proper modelica text model editing

Added direct graph navigation without activating Matplotlib toolbar modes:
Mouse wheel zooms in and out around the cursor. Left-click dragging pans the graph. Matplotlib toolbar modes still work and take precedence when activated. The existing Home button can reset the view.
2026-07-21 17:16:06 +02:00 · 2026-07-21 15:29:58 +02:00 · 2026-07-21 15:24:24 +02:00 · 2026-07-21 15:14:12 +02:00
24 changed files with 1617 additions and 142 deletions
--- a/BEdit/.vscode/tasks.json
+++ b/BEdit/.vscode/tasks.json
@@ -115,6 +115,14 @@
            "options": {"cwd": "${workspaceFolder}"},
            "problemMatcher": []
        },
+        {
+            "label": "Qt: Compile Simulation Window UI to Python",
+            "type": "shell",
+            "command": "pyside6-uic",
+            "args": ["--from-imports", "${workspaceFolder}/ui/simulation_window.ui", "-o", "${workspaceFolder}/src/bedit/gui/generated/ui_simulation_window.py"],
+            "options": {"cwd": "${workspaceFolder}"},
+            "problemMatcher": []
+        },
        {
            "label": "Qt: Build Designer Files",
            "dependsOrder": "sequence",
@@ -125,7 +133,8 @@
                "Qt: Compile Component Options UI to Python",
                "Qt: Compile Port Options UI to Python",
                "Qt: Compile Shape Options UI to Python",
-                "Qt: Compile Icon Editor UI to Python"
+                "Qt: Compile Icon Editor UI to Python",
+                "Qt: Compile Simulation Window UI to Python"
            ],
            "problemMatcher": [],
            "group": {
--- a/BEdit/AGENTS.md
+++ b/BEdit/AGENTS.md
@@ -104,6 +104,11 @@ Keep the root of `src/bedit` minimal. New UI modules should go into the relevant
  named BEdit `$name$` macro completions editable there; arbitrary `$name$`
  expressions are highlighted as BEvalues. Highlight colors and bold/italic
  styles are persisted under `syntax/<category>/` in application settings.
+- Text component sources may contain private Modelica declarations in
+  `source.declarations`. The text-definition editor exposes declarations above
+  `source.initialEquations` and `source.equations`, with the same highlighting
+  and completion in all three fields. The composer emits each in its matching
+  Modelica section.
 - Application-wide messages use `core.application_log.get_logger()`. The main
  window installs the Qt log-panel handler; core code must only use standard
  Python logging and must not import the GUI handler.
@@ -116,6 +121,8 @@ Keep the root of `src/bedit` minimal. New UI modules should go into the relevant
  per component instance from graph connections and exposed while compiling as
  `$portname_N$`; array connection endpoints receive stable one-based indices in
  graph connection order.
+- Simulation → Export Model composes through `Simulation.compose_source()` without
+  building the model, then writes the generated source as a `.mo` file.
 - OpenModelica integration belongs in `core/simulation/openmodelica.py`. Its
  persistent worker and OMC session start lazily on the first queued request.
  Never perform OMPython work directly on the Qt GUI thread. Result and error
@@ -131,6 +138,8 @@ Keep the root of `src/bedit` minimal. New UI modules should go into the relevant
  progress, log, and future result views. Extend graph presentation through its
  Designer-owned `resultsLayout` and the
  `clear_result_views()`/`load_result_views()` hooks.
+- Simulation-window geometry, dock/toolbar state, and central-results visibility
+  persist under `simulationWindow/` through `application_settings()`.
 - Standalone simulation results are modeled in `core/simulation/results.py`.
  Its versioned schema retains model status, messages, metadata, and plottable
  traces so the simulation window can open results without an active document.
@@ -139,6 +148,22 @@ Keep the root of `src/bedit` minimal. New UI modules should go into the relevant
 - After a successful OpenModelica run, `<model>_res.csv` is parsed on the worker
  before temporary-directory cleanup. `SimulationResults.data` stores every CSV
  column as a numeric array, including `time`, for later plotting and persistence.
+- The simulation window's dockable Signals tree derives hierarchy from dot-separated
+  result-column names and bracketed array indices (`a[1]` becomes `a → 1`). Leaf
+  items retain the exact full column name in `UserRole`; plotting code should
+  consume `SimulationWindow.selected_signal_names()`.
+- Simulation graph tabs persist as `SimulationResults.graphs`; every graph has a
+  stable ID, editable title, and its own `traces` list. Runtime graph widgets belong
+  in `GraphWorkspacePage.plot_layout`, not in the serialized core model. The
+  Signals tree checkboxes edit the active graph's traces, and each page embeds a
+  Matplotlib QtAgg canvas. Each graph persists its own `x_axis` signal (default
+  `time`), selectable from the Signals tree context menu.
+- Embedded Matplotlib canvases provide cursor-centered wheel zoom and direct
+  left-button drag panning without activating navigation-toolbar modes. Their
+  custom navigation toolbar restores an explicit data-derived home view.
+- Rerunning the same composed model retains graph tabs, ordering, titles, X axes,
+  and surviving trace settings while replacing numeric data. Missing signals are
+  pruned from traces/X-axis selection and newly returned columns appear in the tree.
 - The optional OpenModelica executable is persisted as
  `simulation/openModelicaPath`. The GUI passes it into `Simulation`; core must
  not read `QSettings`. An empty path uses OMPython/PATH discovery, while an
--- a/BEdit/pyproject.toml
+++ b/BEdit/pyproject.toml
@@ -9,6 +9,7 @@ description = "A starter Qt desktop application"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
+    "matplotlib>=3.8,<4",
    "msgpack>=1.0,<2",
    "PySide6>=6.7,<7",
    "OMPython>4.0",
--- a/BEdit/resources/icons/list-add.png
+++ b/BEdit/resources/icons/list-add.png
--- a/BEdit/resources/icons/list-remove.png
+++ b/BEdit/resources/icons/list-remove.png
--- a/BEdit/resources/resources.qrc
+++ b/BEdit/resources/resources.qrc
@@ -1,5 +1,7 @@
 <RCC>
  <qresource prefix="icons">
+    <file>icons/list-remove.png</file>
+    <file>icons/list-add.png</file>
    <file>icons/view-form-table.png</file>
    <file>icons/office-chart-line.png</file>
    <file>icons/run-build.png</file>
--- a/BEdit/resources/resources_rc.py
+++ b/BEdit/resources/resources_rc.py
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+\xad\xf7\x7f\xdf\xd9\xde\x82\x83\xcdk\xb03n\x86\x9cR\
+\xc0\xb4D\xb7\xea\xc5V\xde\x82<\xea!H^H\x0d\
+ \xdf\x1c\xbc\xb9ym\xa0W7*\xb4\xe6\xf3 c\
+\xc0Dx\xa2\xf9q\xc8@Add$`\xdeN\x0d\
+\xe0N\xff\xec\x05\xd9\x1c=?\xee\xf3\xe5\xfb\x22Z\xa0\
+,\x83\xeb\x18*\xab\xc2 \x9b\xb9\x12\xa0n\xffD\x7f\
+\xf1\x12V0\x1e\xfa\xdf\xf3\x7f\x00j\xf0\xda\xe8\xbc\xba\
+\xd0\x0a\x00\x00\x00\x00IEND\xaeB`\x82\
 \x00\x00\x04<\
 \x89\
 PNG\x0d\x0a\x1a\x0a\x00\x00\x00\x0dIHDR\x00\
@@ -2649,6 +2813,10 @@ qt_resource_name = b"\
 \x0f\xba\x1e'\
 \x00d\
 \x00r\x00a\x00w\x00-\x00p\x00a\x00t\x00h\x00.\x00p\x00n\x00g\
+\x00\x0f\
+\x020\x8b\xe7\
+\x00l\
+\x00i\x00s\x00t\x00-\x00r\x00e\x00m\x00o\x00v\x00e\x00.\x00p\x00n\x00g\
 \x00\x0d\
 \x0b\xe6\x1f\xa7\
 \x00d\
@@ -2723,6 +2891,10 @@ qt_resource_name = b"\
 \x00o\
 \x00f\x00f\x00i\x00c\x00e\x00-\x00c\x00h\x00a\x00r\x00t\x00-\x00l\x00i\x00n\x00e\
 \x00.\x00p\x00n\x00g\
+\x00\x0c\
+\x09\xc6\x19'\
+\x00l\
+\x00i\x00s\x00t\x00-\x00a\x00d\x00d\x00.\x00p\x00n\x00g\
 \x00\x10\
 \x03\xe6\xd3g\
 \x00d\
@@ -2749,67 +2921,71 @@ qt_resource_struct = b"\
 \x00\x00\x00\x00\x00\x00\x00\x00\
 \x00\x00\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x00\x02\
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-\x00\x00\x00\x00\x00\x02\x00\x00\x00\x1e\x00\x00\x00\x03\
+\x00\x00\x00\x00\x00\x02\x00\x00\x00 \x00\x00\x00\x03\
 \x00\x00\x00\x00\x00\x00\x00\x00\
-\x00\x00\x01\xfe\x00\x00\x00\x00\x00\x01\x00\x00N\xe8\
+\x00\x00\x02\x22\x00\x00\x00\x00\x00\x01\x00\x00S\x15\
 \x00\x00\x01\x9f{C\xf1'\
-\x00\x00\x02>\x00\x00\x00\x00\x00\x01\x00\x00Z\x1a\
+\x00\x00\x02b\x00\x00\x00\x00\x00\x01\x00\x00^G\
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-\x00\x00\x02\xec\x00\x00\x00\x00\x00\x01\x00\x00tV\
+\x00\x00\x03\x10\x00\x00\x00\x00\x00\x01\x00\x00x\x83\
 \x00\x00\x01\x9f{0\xc99\
-\x00\x00\x03\xa4\x00\x00\x00\x00\x00\x01\x00\x00\x8d\xaa\
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+\x00\x00\x01\x9f\x84\xbd\x03\xb8\
+\x00\x00\x03\xc8\x00\x00\x00\x00\x00\x01\x00\x00\x91\xd7\
 \x00\x00\x01\x9f\x84\x8f\x00\xb9\
-\x00\x00\x01\xc4\x00\x00\x00\x00\x00\x01\x00\x00D2\
+\x00\x00\x01\xe8\x00\x00\x00\x00\x00\x01\x00\x00H_\
 \x00\x00\x01\x9f\x7f&\x83\xcd\
-\x00\x00\x01\xa4\x00\x00\x00\x00\x00\x01\x00\x00<J\
+\x00\x00\x01\xc8\x00\x00\x00\x00\x00\x01\x00\x00@w\
 \x00\x00\x01\x9f{C\xf1\x18\
-\x00\x00\x03\xd4\x00\x00\x00\x00\x00\x01\x00\x00\x91\x1b\
+\x00\x00\x04\x16\x00\x00\x00\x00\x00\x01\x00\x00\x9b\x1b\
 \x00\x00\x01\x9f\x7fY\xceg\
-\x00\x00\x02\xa2\x00\x00\x00\x00\x00\x01\x00\x00f\xc8\
+\x00\x00\x02\xc6\x00\x00\x00\x00\x00\x01\x00\x00j\xf5\
 \x00\x00\x01\x9f\x7fV\xd5\xc0\
-\x00\x00\x03Z\x00\x00\x00\x00\x00\x01\x00\x00\x84\xc5\
+\x00\x00\x03~\x00\x00\x00\x00\x00\x01\x00\x00\x88\xf2\
 \x00\x00\x01\x9f\x7f&\x83r\
-\x00\x00\x02\xce\x00\x00\x00\x00\x00\x01\x00\x00m[\
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-\x00\x00\x01\xe0\x00\x00\x00\x00\x00\x01\x00\x00Kh\
+\x00\x00\x02\x04\x00\x00\x00\x00\x00\x01\x00\x00O\x95\
 \x00\x00\x01\x9f{C\xf1.\
-\x00\x00\x03\xfa\x00\x00\x00\x00\x00\x01\x00\x00\x95[\
+\x00\x00\x04<\x00\x00\x00\x00\x00\x01\x00\x00\x9f[\
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-\x00\x00\x01\x84\x00\x00\x00\x00\x00\x01\x00\x006\x9c\
+\x00\x00\x01\xa8\x00\x00\x00\x00\x00\x01\x00\x00:\xc9\
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-\x00\x00\x04&\x00\x00\x00\x00\x00\x01\x00\x00\x97\x0c\
+\x00\x00\x04h\x00\x00\x00\x00\x00\x01\x00\x00\xa1\x0c\
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+\x00\x00\x01\x9f\x84\xbd\x03\xde\
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 \x00\x00\x01\x9f{0\xc9R\
 "

--- a/BEdit/src/bedit/core/model.py
+++ b/BEdit/src/bedit/core/model.py
@@ -344,11 +344,19 @@ class Component:
        if kind == "text":
            raw_source = implementation.get("source", {})
            equations = raw_source.get("equations", "")
+            declarations = raw_source.get("declarations", "")
+            initial_equations = raw_source.get("initialEquations", "")
            parameters = data.get("parameters", raw_source.get("parameters", []))
            if not isinstance(equations, str):
                raise ValueError("Text component equations must be a string")
+            if not isinstance(declarations, str):
+                raise ValueError("Text component declarations must be a string")
+            if not isinstance(initial_equations, str):
+                raise ValueError("Text component initial equations must be a string")
            source = {
                "equations": equations,
+                "declarations": declarations,
+                "initialEquations": initial_equations,
            }
        if not isinstance(parameters, list):
            raise ValueError("Component parameters must be a list")
--- a/BEdit/src/bedit/core/simulation/init.py
+++ b/BEdit/src/bedit/core/simulation/init.py
@@ -4,6 +4,7 @@ from bedit.core.simulation.results import (
    BerSimulationResultsSerializer,
    JsonSimulationResultsSerializer,
    SimulationExecutionResult,
+    SimulationGraph,
    SimulationResults,
    SimulationResultsSerializer,
    SimulationTrace,
@@ -14,6 +15,7 @@ __all__ = [
    "Simulation",
    "SimulationResults",
    "SimulationExecutionResult",
+    "SimulationGraph",
    "SimulationResultsSerializer",
    "SimulationTrace",
    "BerSimulationResultsSerializer",
--- a/BEdit/src/bedit/core/simulation/composer.py
+++ b/BEdit/src/bedit/core/simulation/composer.py
@@ -123,6 +123,14 @@ def emit_model(
            f"{body_indent}parameter {parameter_type} {parameter_name} = {value};"
        )

+    if implementation_kind == "text":
+        declarations = str(implementation.get("source", {}).get("declarations", ""))
+        declarations = expand_bevalues(declarations, macros)
+        lines.extend(
+            f"{body_indent}{line}" if line.strip() else ""
+            for line in declarations.splitlines()
+        )
+
    if implementation_kind == "graph":
        for block in nested_graph.get("blocks", []):
            block_type = model_name_for(block)
@@ -134,8 +142,9 @@ def emit_model(
                f"{body_indent}{junction_type} {_junction_name(junction['id'])};"
            )

-    lines.append(f"{indentation}equation")
    if implementation_kind == "graph":
+        lines.append(f"{indentation}equation")
+
        blocks = {block["id"]: block for block in nested_graph.get("blocks", [])}
        junctions = {
            junction["id"]: junction for junction in nested_graph.get("junctions", [])
@@ -151,8 +160,21 @@ def emit_model(
            # Connector types may require different equations in future.
            lines.append(f"{body_indent}{target} = {source};")
    else:
+        initial_equations = str(
+            implementation.get("source", {}).get("initialEquations", "")
+        )
+        initial_equations = expand_bevalues(initial_equations, macros)
        equations = str(implementation.get("source", {}).get("equations", ""))
        equations = expand_bevalues(equations, macros)
+
+        if initial_equations.strip():
+            lines.append(f"{indentation}initial equation")
+            lines.extend(
+                f"{body_indent}{line}" if line.strip() else ""
+                for line in initial_equations.splitlines()
+            )
+
+        lines.append(f"{indentation}equation")
        lines.extend(
            f"{body_indent}{line}" if line.strip() else ""
            for line in equations.splitlines()
@@ -161,7 +183,6 @@ def emit_model(
    lines.append(f"{indentation}end {model_name};")
    return "\n".join(lines) + "\n"

-
 def cleanup_graph(graph: dict[str, Any]) -> dict[str, Any]:
    """Remove annotations and UI-only data from a serialized component tree."""

--- a/BEdit/src/bedit/core/simulation/results.py
+++ b/BEdit/src/bedit/core/simulation/results.py
@@ -4,6 +4,7 @@ import zlib
 from dataclasses import asdict, dataclass, field
 from pathlib import Path
 from typing import Any
+from uuid import uuid4

 import msgpack

@@ -25,6 +26,16 @@ class SimulationTrace:
    properties: dict[str, Any] = field(default_factory=dict)


+@dataclass
+class SimulationGraph:
+    """One graph workspace tab and its configured traces."""
+
+    id: str = field(default_factory=lambda: str(uuid4()))
+    title: str = "Graph 1"
+    x_axis: str = "time"
+    traces: list[SimulationTrace] = field(default_factory=list)
+
+
@dataclass
 class SimulationResults:
    """Serializable state displayed by the standalone simulation window."""
@@ -33,7 +44,9 @@ class SimulationResults:
    status: dict[str, Any] = field(default_factory=dict)
    messages: list[dict[str, str]] = field(default_factory=list)
    data: dict[str, list[float]] = field(default_factory=dict)
-    traces: list[SimulationTrace] = field(default_factory=list)
+    graphs: list[SimulationGraph] = field(
+        default_factory=lambda: [SimulationGraph()]
+    )
    metadata: dict[str, Any] = field(default_factory=dict)

    def to_dict(self) -> dict[str, Any]:
@@ -44,7 +57,7 @@ class SimulationResults:
            "status": dict(self.status),
            "messages": [dict(message) for message in self.messages],
            "data": {name: list(values) for name, values in self.data.items()},
-            "traces": [asdict(trace) for trace in self.traces],
+            "graphs": [asdict(graph) for graph in self.graphs],
            "metadata": dict(self.metadata),
        }

@@ -55,7 +68,17 @@ class SimulationResults:
        if data.get("version") != RESULTS_VERSION:
            raise ValueError(f"Unsupported simulation-results version: {data.get('version')!r}")
        try:
-            traces = [SimulationTrace(**trace) for trace in data.get("traces", [])]
+            graphs = [
+                SimulationGraph(
+                    id=str(graph["id"]),
+                    title=str(graph["title"]),
+                    x_axis=str(graph.get("x_axis", "time")),
+                    traces=[
+                        SimulationTrace(**trace) for trace in graph.get("traces", [])
+                    ],
+                )
+                for graph in data.get("graphs", [])
+            ]
            return cls(
                model_name=str(data.get("modelName", "")),
                status=dict(data.get("status", {})),
@@ -64,10 +87,10 @@ class SimulationResults:
                    str(name): [float(value) for value in values]
                    for name, values in dict(data.get("data", {})).items()
                },
-                traces=traces,
+                graphs=graphs,
                metadata=dict(data.get("metadata", {})),
            )
-        except (TypeError, ValueError) as error:
+        except (KeyError, TypeError, ValueError) as error:
            raise ValueError("Malformed simulation-results data") from error


--- a/BEdit/src/bedit/core/simulation/service.py
+++ b/BEdit/src/bedit/core/simulation/service.py
@@ -47,13 +47,7 @@ class Simulation:
        """Compose and retain the active graph's Modelica representation."""

        self.model_path = None
-
-        # Create openmodelica model
-        result = compose_graph(graph)
-        self.last_composition_input = result.graph
-        self.id_list = result.objects_by_id
-        self.last_composition_output = result.modelica
-        self.model_name = result.model_name
+        self.compose_source(graph)

        def _model_compiled(result):
            log.info("Compiling OK: %s", result)
@@ -79,6 +73,17 @@ class Simulation:
            error_callback,
        )

+    def compose_source(self, graph: dict[str, Any]) -> tuple[str, str]:
+        """Compose Modelica source without asking OpenModelica to build it."""
+
+        result = compose_graph(graph)
+        self.last_composition_input = result.graph
+        self.id_list = result.objects_by_id
+        self.last_composition_output = result.modelica
+        self.model_name = result.model_name
+        # log.info("Composed OpenModelica model:\n%s", result.modelica)
+        return result.model_name, result.modelica
+
    def run_simulation(
        self,
        graph: dict[str, Any],
--- a/BEdit/src/bedit/gui/controllers/document.py
+++ b/BEdit/src/bedit/gui/controllers/document.py
@@ -168,7 +168,13 @@ class DocumentController(QObject):
            name=self._available_component_name(base_name, self.document.roots.values(), number),
            implementation_kind=kind,
            icon=Icon(text="Graph" if kind == "graph" else "Text"),
-            source={"equations": ""} if kind == "text" else {},
+            source={
+                "declarations": "",
+                "initialEquations": "",
+                "equations": "",
+            }
+            if kind == "text"
+            else {},
        )
        self.undo_stack.push(AddComponentCommand(self, None, component))
        self.activate_component(component.id)
@@ -187,7 +193,13 @@ class DocumentController(QObject):
            name=self._available_component_name(base_name, owner.graph.blocks.values(), number),
            implementation_kind=kind,
            icon=Icon(text="Graph" if kind == "graph" else "Text"),
-            source={"equations": ""} if kind == "text" else {},
+            source={
+                "declarations": "",
+                "initialEquations": "",
+                "equations": "",
+            }
+            if kind == "text"
+            else {},
        )
        self.undo_stack.push(AddComponentCommand(self, owner_id, component))
        return component.id
@@ -427,6 +439,12 @@ class DocumentController(QObject):
            raise ValueError("Open a graph component before composing")
        self.simulation.compose(component.to_dict())

+    def compose_active_graph_source(self) -> tuple[str, str]:
+        component = self.active_component
+        if component is None or component.implementation_kind != "graph":
+            raise ValueError("Open a graph component before exporting a model")
+        return self.simulation.compose_source(component.to_dict())
+
    def run_simulation(
        self,
        progress_callback=None,
@@ -636,6 +654,8 @@ class DocumentController(QObject):
        self,
        inputs: list[Port],
        outputs: list[Port],
+        declarations: str,
+        initial_equations: str,
        equations: str,
        parameters: list[Parameter],
    ) -> None:
@@ -682,6 +702,8 @@ class DocumentController(QObject):
            "outputs": [port.to_dict() for port in outputs],
            "source": {
                "equations": equations,
+                "declarations": declarations,
+                "initialEquations": initial_equations,
            },
            "parameters": [parameter.to_dict() for parameter in parameters],
        }
--- a/BEdit/src/bedit/gui/editors/text_definition.py
+++ b/BEdit/src/bedit/gui/editors/text_definition.py
@@ -14,7 +14,7 @@ PROPERTIES_ROLE = Qt.ItemDataRole.UserRole + 1


 class TextDefinitionEditor(QWidget):
-    """Editor for a text component's equations, ports, and parameters."""
+    """Editor for a text component's Modelica source, ports, and parameters."""

    modifiedChanged = Signal(bool)
    definitionEdited = Signal()
@@ -32,7 +32,10 @@ class TextDefinitionEditor(QWidget):
            QHeaderView.ResizeMode.Stretch
        )
        self.ui.columnSplitter.setSizes([560, 340])
+        self.ui.sourceSplitter.setSizes([180, 180, 240])
        self.ui.definitionSplitter.setSizes([300, 300])
+        self.ui.declarationsEdit.textChanged.connect(self._mark_modified)
+        self.ui.initialEquationsEdit.textChanged.connect(self._mark_modified)
        self.ui.equationsEdit.textChanged.connect(self._mark_modified)
        self.ui.portsTable.cellChanged.connect(self._symbols_modified)
        self.ui.parametersTable.cellChanged.connect(self._symbols_modified)
@@ -52,6 +55,14 @@ class TextDefinitionEditor(QWidget):
    def equations(self) -> str:
        return self.ui.equationsEdit.toPlainText()

+    @property
+    def declarations(self) -> str:
+        return self.ui.declarationsEdit.toPlainText()
+
+    @property
+    def initial_equations(self) -> str:
+        return self.ui.initialEquationsEdit.toPlainText()
+
    @property
    def ports(self) -> tuple[list[Port], list[Port]]:
        inputs: list[Port] = []
@@ -87,12 +98,16 @@ class TextDefinitionEditor(QWidget):

    def set_definition(
        self,
+        declarations: str,
+        initial_equations: str,
        equations: str,
        inputs: list[Port],
        outputs: list[Port],
        parameters: list[Parameter],
    ) -> None:
        self._loading = True
+        self.ui.declarationsEdit.setPlainText(declarations)
+        self.ui.initialEquationsEdit.setPlainText(initial_equations)
        self.ui.equationsEdit.setPlainText(equations)
        self.ui.portsTable.setRowCount(0)
        for port in inputs:
@@ -102,11 +117,7 @@ class TextDefinitionEditor(QWidget):
        self.ui.parametersTable.setRowCount(0)
        for parameter in parameters:
            self._append_parameter(parameter)
-        self.ui.equationsEdit.set_symbols(
-            [port.name for port in inputs],
-            [port.name for port in outputs],
-            [parameter.name for parameter in parameters],
-        )
+        self._set_editor_symbols(inputs, outputs, parameters)
        self._loading = False
        self.set_modified(False)
        self._update_buttons()
@@ -128,11 +139,22 @@ class TextDefinitionEditor(QWidget):

    def _refresh_editor_symbols(self) -> None:
        inputs, outputs = self.ports
-        self.ui.equationsEdit.set_symbols(
+        self._set_editor_symbols(inputs, outputs, self.parameters)
+
+    def _set_editor_symbols(
+        self,
+        inputs: list[Port],
+        outputs: list[Port],
+        parameters: list[Parameter],
+    ) -> None:
+        symbols = (
            [port.name for port in inputs],
            [port.name for port in outputs],
-            [parameter.name for parameter in self.parameters],
+            [parameter.name for parameter in parameters],
        )
+        self.ui.declarationsEdit.set_symbols(*symbols)
+        self.ui.initialEquationsEdit.set_symbols(*symbols)
+        self.ui.equationsEdit.set_symbols(*symbols)

    def _new_combo(self, values: list[tuple[str, str]], current: str) -> QComboBox:
        combo = QComboBox(self)
--- a/BEdit/src/bedit/gui/generated/resources_rc.py
+++ b/BEdit/src/bedit/gui/generated/resources_rc.py
@@ -862,6 +862,75 @@ N\xa7\xd3>==\xfd\xa1\xc3\xe1\x98\x92$\xe9I\x00\
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 `\x82\
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+mI\xdc\x224`\xfaE~\xe9\x0e\xa4\xd3=B\xa7\
+F\xe9\xe8\xe8\x1dE\x90B&\xd1)\x0c\xc4`,c\
+\x19\xcbX\x06\xf2'\xe3\xdf\x9d\x06\x06\xf6\x92\x0e\x00\x00\
+\x00\x22zTXtSoftware\x00\x00\
+x\xda+//\xd7\xcb\xcc\xcb.NN,H\xd5\xcb\
+/J\x07\x006\xd8\x06X\x10S\xca\x5c\x00\x00\x00\x00\
+IEND\xaeB`\x82\
 \x00\x00\x02V\
 \x89\
 PNG\x0d\x0a\x1a\x0a\x00\x00\x00\x0dIHDR\x00\
@@ -2383,6 +2452,101 @@ u1\xb8\xdd0`x\xe8F\xf9\x1e\xe19\xea\x8a\x03\
 |f\x1e\x89\xd1\x9ef\xbdhx\x0fE4mL\xaf\
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 \x00\x00\x00\x00IEND\xaeB`\x82\
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+\x89\
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@@ -2649,6 +2813,10 @@ qt_resource_name = b"\
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 \x00d\
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@@ -2723,6 +2891,10 @@ qt_resource_name = b"\
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@@ -2749,67 +2921,71 @@ qt_resource_struct = b"\
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 "

--- a/BEdit/src/bedit/gui/generated/ui_main_window.py
+++ b/BEdit/src/bedit/gui/generated/ui_main_window.py
@@ -56,50 +56,53 @@ class Ui_MainWindow(object):
        icon4 = QIcon()
        icon4.addFile(u":/icons/icons/office-chart-line.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
        self.actionSimulationWindow.setIcon(icon4)
+        self.actionExportModel = QAction(MainWindow)
+        self.actionExportModel.setObjectName(u"actionExportModel")
+        icon5 = QIcon()
+        icon5.addFile(u":/icons/icons/document-save-as.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionExportModel.setIcon(icon5)
        self.actionNew = QAction(MainWindow)
        self.actionNew.setObjectName(u"actionNew")
-        icon5 = QIcon()
-        icon5.addFile(u":/icons/icons/document-new.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionNew.setIcon(icon5)
+        icon6 = QIcon()
+        icon6.addFile(u":/icons/icons/document-new.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionNew.setIcon(icon6)
        self.actionRotateClockwise = QAction(MainWindow)
        self.actionRotateClockwise.setObjectName(u"actionRotateClockwise")
-        icon6 = QIcon()
-        icon6.addFile(u":/icons/icons/transform-rotate.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionRotateClockwise.setIcon(icon6)
+        icon7 = QIcon()
+        icon7.addFile(u":/icons/icons/transform-rotate.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionRotateClockwise.setIcon(icon7)
        self.actionZoomIn = QAction(MainWindow)
        self.actionZoomIn.setObjectName(u"actionZoomIn")
-        icon7 = QIcon()
-        icon7.addFile(u":/icons/icons/zoom-in.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionZoomIn.setIcon(icon7)
+        icon8 = QIcon()
+        icon8.addFile(u":/icons/icons/zoom-in.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionZoomIn.setIcon(icon8)
        self.actionZoomOut = QAction(MainWindow)
        self.actionZoomOut.setObjectName(u"actionZoomOut")
-        icon8 = QIcon()
-        icon8.addFile(u":/icons/icons/zoom-out.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionZoomOut.setIcon(icon8)
+        icon9 = QIcon()
+        icon9.addFile(u":/icons/icons/zoom-out.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionZoomOut.setIcon(icon9)
        self.actionCenterView = QAction(MainWindow)
        self.actionCenterView.setObjectName(u"actionCenterView")
-        icon9 = QIcon()
-        icon9.addFile(u":/icons/icons/zoom-original.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionCenterView.setIcon(icon9)
+        icon10 = QIcon()
+        icon10.addFile(u":/icons/icons/zoom-original.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionCenterView.setIcon(icon10)
        self.actionOpen = QAction(MainWindow)
        self.actionOpen.setObjectName(u"actionOpen")
-        icon10 = QIcon()
-        icon10.addFile(u":/icons/icons/document-open.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionOpen.setIcon(icon10)
+        icon11 = QIcon()
+        icon11.addFile(u":/icons/icons/document-open.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionOpen.setIcon(icon11)
        self.actionReloadLibraries = QAction(MainWindow)
        self.actionReloadLibraries.setObjectName(u"actionReloadLibraries")
        self.actionReloadSimulation = QAction(MainWindow)
        self.actionReloadSimulation.setObjectName(u"actionReloadSimulation")
        self.actionSave = QAction(MainWindow)
        self.actionSave.setObjectName(u"actionSave")
-        icon11 = QIcon()
-        icon11.addFile(u":/icons/icons/document-save.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionSave.setIcon(icon11)
+        icon12 = QIcon()
+        icon12.addFile(u":/icons/icons/document-save.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionSave.setIcon(icon12)
        self.actionSaveAs = QAction(MainWindow)
        self.actionSaveAs.setObjectName(u"actionSaveAs")
-        icon12 = QIcon()
-        icon12.addFile(u":/icons/icons/document-save-as.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionSaveAs.setIcon(icon12)
+        self.actionSaveAs.setIcon(icon5)
        self.actionExit = QAction(MainWindow)
        self.actionExit.setObjectName(u"actionExit")
        self.actionClose = QAction(MainWindow)
@@ -295,7 +298,7 @@ class Ui_MainWindow(object):

        self.rotateToolButton = QToolButton(self.workspaceHeader)
        self.rotateToolButton.setObjectName(u"rotateToolButton")
-        self.rotateToolButton.setIcon(icon6)
+        self.rotateToolButton.setIcon(icon7)

        self.workspaceHeaderLayout.addWidget(self.rotateToolButton)

@@ -441,6 +444,7 @@ class Ui_MainWindow(object):
        self.menuSimulation.addAction(self.actionSimulationSettings)
        self.menuSimulation.addAction(self.actionGraphParameters)
        self.menuSimulation.addAction(self.actionCompose)
+        self.menuSimulation.addAction(self.actionExportModel)
        self.menuSimulation.addAction(self.actionSimulationWindow)
        self.menuSimulation.addAction(self.actionRunSimulation)
        self.fileToolbar.addAction(self.actionNew)
@@ -496,6 +500,10 @@ class Ui_MainWindow(object):
        self.actionSimulationWindow.setText(QCoreApplication.translate("MainWindow", u"Simulation Window", None))
 #if QT_CONFIG(statustip)
        self.actionSimulationWindow.setStatusTip(QCoreApplication.translate("MainWindow", u"Show the simulation results window", None))
+#endif // QT_CONFIG(statustip)
+        self.actionExportModel.setText(QCoreApplication.translate("MainWindow", u"Export Model\u2026", None))
+#if QT_CONFIG(statustip)
+        self.actionExportModel.setStatusTip(QCoreApplication.translate("MainWindow", u"Save the composed OpenModelica model to a file", None))
 #endif // QT_CONFIG(statustip)
        self.actionNew.setText(QCoreApplication.translate("MainWindow", u"&New", None))
 #if QT_CONFIG(statustip)
--- a/BEdit/src/bedit/gui/generated/ui_simulation_window.py
+++ b/BEdit/src/bedit/gui/generated/ui_simulation_window.py
@@ -16,10 +16,11 @@ from PySide6.QtGui import (QAction, QBrush, QColor, QConicalGradient,
    QIcon, QImage, QKeySequence, QLinearGradient,
    QPainter, QPalette, QPixmap, QRadialGradient,
    QTransform)
-from PySide6.QtWidgets import (QApplication, QDockWidget, QHBoxLayout, QLabel,
-    QListWidget, QListWidgetItem, QMainWindow, QMenu,
-    QMenuBar, QProgressBar, QSizePolicy, QToolBar,
-    QVBoxLayout, QWidget)
+from PySide6.QtWidgets import (QAbstractItemView, QApplication, QDockWidget, QHBoxLayout,
+    QHeaderView, QLabel, QListWidget, QListWidgetItem,
+    QMainWindow, QMenu, QMenuBar, QProgressBar,
+    QSizePolicy, QTabWidget, QToolBar, QTreeWidget,
+    QTreeWidgetItem, QVBoxLayout, QWidget)
 from . import resources_rc

 class Ui_SimulationWindow(object):
@@ -60,15 +61,26 @@ class Ui_SimulationWindow(object):
        self.actionToggleResults.setObjectName(u"actionToggleResults")
        self.actionToggleResults.setCheckable(True)
        self.actionToggleResults.setChecked(True)
+        self.actionAddGraph = QAction(SimulationWindow)
+        self.actionAddGraph.setObjectName(u"actionAddGraph")
+        icon5 = QIcon()
+        icon5.addFile(u":/icons/icons/list-add.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionAddGraph.setIcon(icon5)
+        self.actionRemoveGraph = QAction(SimulationWindow)
+        self.actionRemoveGraph.setObjectName(u"actionRemoveGraph")
+        icon6 = QIcon()
+        icon6.addFile(u":/icons/icons/list-remove.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionRemoveGraph.setIcon(icon6)
        self.centralWidget = QWidget(SimulationWindow)
        self.centralWidget.setObjectName(u"centralWidget")
        self.resultsLayout = QVBoxLayout(self.centralWidget)
        self.resultsLayout.setObjectName(u"resultsLayout")
-        self.resultsPlaceholder = QLabel(self.centralWidget)
-        self.resultsPlaceholder.setObjectName(u"resultsPlaceholder")
-        self.resultsPlaceholder.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        self.graphTabs = QTabWidget(self.centralWidget)
+        self.graphTabs.setObjectName(u"graphTabs")
+        self.graphTabs.setTabsClosable(False)
+        self.graphTabs.setMovable(True)

-        self.resultsLayout.addWidget(self.resultsPlaceholder)
+        self.resultsLayout.addWidget(self.graphTabs)

        SimulationWindow.setCentralWidget(self.centralWidget)
        self.menuBar = QMenuBar(SimulationWindow)
@@ -84,7 +96,13 @@ class Ui_SimulationWindow(object):
        self.menuToolbars.setObjectName(u"menuToolbars")
        self.menuHelp = QMenu(self.menuBar)
        self.menuHelp.setObjectName(u"menuHelp")
+        self.menuGraph = QMenu(self.menuBar)
+        self.menuGraph.setObjectName(u"menuGraph")
        SimulationWindow.setMenuBar(self.menuBar)
+        self.workspaceToolbar = QToolBar(SimulationWindow)
+        self.workspaceToolbar.setObjectName(u"workspaceToolbar")
+        self.workspaceToolbar.setToolButtonStyle(Qt.ToolButtonStyle.ToolButtonIconOnly)
+        SimulationWindow.addToolBar(Qt.ToolBarArea.TopToolBarArea, self.workspaceToolbar)
        self.fileToolbar = QToolBar(SimulationWindow)
        self.fileToolbar.setObjectName(u"fileToolbar")
        self.fileToolbar.setToolButtonStyle(Qt.ToolButtonStyle.ToolButtonIconOnly)
@@ -130,9 +148,26 @@ class Ui_SimulationWindow(object):

        self.logDock.setWidget(self.logDockContents)
        SimulationWindow.addDockWidget(Qt.DockWidgetArea.BottomDockWidgetArea, self.logDock)
+        self.signalsDock = QDockWidget(SimulationWindow)
+        self.signalsDock.setObjectName(u"signalsDock")
+        self.signalsDockContents = QWidget()
+        self.signalsDockContents.setObjectName(u"signalsDockContents")
+        self.signalsLayout = QVBoxLayout(self.signalsDockContents)
+        self.signalsLayout.setObjectName(u"signalsLayout")
+        self.signalsTree = QTreeWidget(self.signalsDockContents)
+        self.signalsTree.setObjectName(u"signalsTree")
+        self.signalsTree.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)
+        self.signalsTree.setSelectionMode(QAbstractItemView.SelectionMode.ExtendedSelection)
+        self.signalsTree.setHeaderHidden(True)
+
+        self.signalsLayout.addWidget(self.signalsTree)
+
+        self.signalsDock.setWidget(self.signalsDockContents)
+        SimulationWindow.addDockWidget(Qt.DockWidgetArea.RightDockWidgetArea, self.signalsDock)

        self.menuBar.addAction(self.menuFile.menuAction())
        self.menuBar.addAction(self.menuView.menuAction())
+        self.menuBar.addAction(self.menuGraph.menuAction())
        self.menuBar.addAction(self.menuHelp.menuAction())
        self.menuFile.addAction(self.actionOpen)
        self.menuFile.addAction(self.actionSave)
@@ -145,10 +180,14 @@ class Ui_SimulationWindow(object):
        self.menuView.addAction(self.menuToolbars.menuAction())
        self.menuHelp.addAction(self.actionAbout)
        self.menuHelp.addAction(self.actionAboutQt)
+        self.menuGraph.addAction(self.actionAddGraph)
+        self.menuGraph.addAction(self.actionRemoveGraph)
+        self.workspaceToolbar.addAction(self.actionAddGraph)
+        self.workspaceToolbar.addAction(self.actionRemoveGraph)
+        self.fileToolbar.addAction(self.actionClear)
        self.fileToolbar.addAction(self.actionOpen)
        self.fileToolbar.addAction(self.actionSave)
        self.fileToolbar.addAction(self.actionSaveAs)
-        self.fileToolbar.addAction(self.actionClear)

        self.retranslateUi(SimulationWindow)

@@ -177,17 +216,29 @@ class Ui_SimulationWindow(object):
        self.actionAbout.setText(QCoreApplication.translate("SimulationWindow", u"&About Simulation Window", None))
        self.actionAboutQt.setText(QCoreApplication.translate("SimulationWindow", u"About &Qt", None))
        self.actionToggleResults.setText(QCoreApplication.translate("SimulationWindow", u"Results", None))
-        self.resultsPlaceholder.setText(QCoreApplication.translate("SimulationWindow", u"Simulation graphs and result controls can be added here.", None))
+        self.actionAddGraph.setText(QCoreApplication.translate("SimulationWindow", u"Add Graph", None))
+#if QT_CONFIG(statustip)
+        self.actionAddGraph.setStatusTip(QCoreApplication.translate("SimulationWindow", u"Add a graph workspace tab", None))
+#endif // QT_CONFIG(statustip)
+        self.actionRemoveGraph.setText(QCoreApplication.translate("SimulationWindow", u"Remove Current Graph", None))
+#if QT_CONFIG(statustip)
+        self.actionRemoveGraph.setStatusTip(QCoreApplication.translate("SimulationWindow", u"Remove the current graph workspace tab", None))
+#endif // QT_CONFIG(statustip)
        self.menuFile.setTitle(QCoreApplication.translate("SimulationWindow", u"&File", None))
        self.menuView.setTitle(QCoreApplication.translate("SimulationWindow", u"&View", None))
        self.menuPanels.setTitle(QCoreApplication.translate("SimulationWindow", u"&Panels", None))
        self.menuToolbars.setTitle(QCoreApplication.translate("SimulationWindow", u"&Toolbars", None))
        self.menuHelp.setTitle(QCoreApplication.translate("SimulationWindow", u"&Help", None))
+        self.menuGraph.setTitle(QCoreApplication.translate("SimulationWindow", u"&Graph", None))
+        self.workspaceToolbar.setWindowTitle(QCoreApplication.translate("SimulationWindow", u"Workspace", None))
        self.fileToolbar.setWindowTitle(QCoreApplication.translate("SimulationWindow", u"File", None))
        self.statusDock.setWindowTitle(QCoreApplication.translate("SimulationWindow", u"Status", None))
        self.timeLabel.setText(QCoreApplication.translate("SimulationWindow", u"Time: 0 s", None))
        self.progressBar.setFormat(QCoreApplication.translate("SimulationWindow", u"%p%", None))
        self.statusLabel.setText(QCoreApplication.translate("SimulationWindow", u"No simulation has been run yet.", None))
        self.logDock.setWindowTitle(QCoreApplication.translate("SimulationWindow", u"Log", None))
+        self.signalsDock.setWindowTitle(QCoreApplication.translate("SimulationWindow", u"Signals", None))
+        ___qtreewidgetitem = self.signalsTree.headerItem()
+        ___qtreewidgetitem.setText(0, QCoreApplication.translate("SimulationWindow", u"Signal", None))
    # retranslateUi

--- a/BEdit/src/bedit/gui/generated/ui_text_definition_editor.py
+++ b/BEdit/src/bedit/gui/generated/ui_text_definition_editor.py
@@ -34,7 +34,31 @@ class Ui_TextDefinitionEditor(object):
        self.columnSplitter.setObjectName(u"columnSplitter")
        self.columnSplitter.setOrientation(Qt.Orientation.Horizontal)
        self.columnSplitter.setChildrenCollapsible(False)
-        self.equationsGroup = QGroupBox(self.columnSplitter)
+        self.sourceSplitter = QSplitter(self.columnSplitter)
+        self.sourceSplitter.setObjectName(u"sourceSplitter")
+        self.sourceSplitter.setOrientation(Qt.Orientation.Vertical)
+        self.sourceSplitter.setChildrenCollapsible(False)
+        self.declarationsGroup = QGroupBox(self.sourceSplitter)
+        self.declarationsGroup.setObjectName(u"declarationsGroup")
+        self.declarationsLayout = QVBoxLayout(self.declarationsGroup)
+        self.declarationsLayout.setObjectName(u"declarationsLayout")
+        self.declarationsEdit = OpenModelicaEditor(self.declarationsGroup)
+        self.declarationsEdit.setObjectName(u"declarationsEdit")
+
+        self.declarationsLayout.addWidget(self.declarationsEdit)
+
+        self.sourceSplitter.addWidget(self.declarationsGroup)
+        self.initialEquationsGroup = QGroupBox(self.sourceSplitter)
+        self.initialEquationsGroup.setObjectName(u"initialEquationsGroup")
+        self.initialEquationsLayout = QVBoxLayout(self.initialEquationsGroup)
+        self.initialEquationsLayout.setObjectName(u"initialEquationsLayout")
+        self.initialEquationsEdit = OpenModelicaEditor(self.initialEquationsGroup)
+        self.initialEquationsEdit.setObjectName(u"initialEquationsEdit")
+
+        self.initialEquationsLayout.addWidget(self.initialEquationsEdit)
+
+        self.sourceSplitter.addWidget(self.initialEquationsGroup)
+        self.equationsGroup = QGroupBox(self.sourceSplitter)
        self.equationsGroup.setObjectName(u"equationsGroup")
        self.equationsLayout = QVBoxLayout(self.equationsGroup)
        self.equationsLayout.setObjectName(u"equationsLayout")
@@ -43,7 +67,8 @@ class Ui_TextDefinitionEditor(object):

        self.equationsLayout.addWidget(self.equationsEdit)

-        self.columnSplitter.addWidget(self.equationsGroup)
+        self.sourceSplitter.addWidget(self.equationsGroup)
+        self.columnSplitter.addWidget(self.sourceSplitter)
        self.definitionSplitter = QSplitter(self.columnSplitter)
        self.definitionSplitter.setObjectName(u"definitionSplitter")
        self.definitionSplitter.setOrientation(Qt.Orientation.Vertical)
@@ -141,6 +166,8 @@ class Ui_TextDefinitionEditor(object):
    # setupUi

    def retranslateUi(self, TextDefinitionEditor):
+        self.declarationsGroup.setTitle(QCoreApplication.translate("TextDefinitionEditor", u"Declarations", None))
+        self.initialEquationsGroup.setTitle(QCoreApplication.translate("TextDefinitionEditor", u"Initial Equations", None))
        self.equationsGroup.setTitle(QCoreApplication.translate("TextDefinitionEditor", u"Equations", None))
        self.portsGroup.setTitle(QCoreApplication.translate("TextDefinitionEditor", u"Ports", None))
        ___qtablewidgetitem = self.portsTable.horizontalHeaderItem(0)
--- a/BEdit/src/bedit/gui/main_window.py
+++ b/BEdit/src/bedit/gui/main_window.py
@@ -181,6 +181,7 @@ class MainWindow(QMainWindow):
        )
        self.ui.actionGraphParameters.triggered.connect(self.show_graph_parameters)
        self.ui.actionCompose.triggered.connect(self.compose_active_graph)
+        self.ui.actionExportModel.triggered.connect(self.export_model)
        self.ui.actionSimulationWindow.triggered.connect(self.show_simulation_window)
        self.ui.actionRunSimulation.triggered.connect(self.run_simulation)
        self.document_controller.undo_stack.canUndoChanged.connect(self.ui.actionUndo.setEnabled)
@@ -261,6 +262,35 @@ class MainWindow(QMainWindow):
            self.log.error("Composition failed: %s", error)
            QMessageBox.warning(self, "Cannot compose", str(error))

+    @Slot()
+    def export_model(self) -> None:
+        try:
+            model_name, source = self.document_controller.compose_active_graph_source()
+        except ValueError as error:
+            self.log.error("Model export composition failed: %s", error)
+            QMessageBox.warning(self, "Cannot Export Model", str(error))
+            return
+        file_name, _selected_filter = QFileDialog.getSaveFileName(
+            self,
+            "Export OpenModelica Model",
+            f"{model_name}.mo",
+            "Modelica Models (*.mo);;All Files (*)",
+        )
+        if not file_name:
+            return
+        path = Path(file_name)
+        if not path.suffix:
+            path = path.with_suffix(".mo")
+        temporary_path = path.with_suffix(path.suffix + ".tmp")
+        try:
+            temporary_path.write_text(source, encoding="utf-8")
+            temporary_path.replace(path)
+        except OSError as error:
+            self.log.error("Could not export model %s: %s", path, error)
+            QMessageBox.critical(self, "Cannot Export Model", str(error))
+            return
+        self.log.info("Exported OpenModelica model to %s", path)
+
    @Slot()
    def show_simulation_window(self) -> None:
        self._simulation_window.show()
@@ -274,7 +304,7 @@ class MainWindow(QMainWindow):
        self.show_simulation_window()
        try:
            self.document_controller.run_simulation(*callbacks)
-            window.set_model_name(self.simulation.model_name)
+            window.prepare_run_model(self.simulation.model_name)
        except Exception as error:
            self.log.exception("Simulation run failed")
            window.report_start_error(error)
@@ -307,6 +337,7 @@ class MainWindow(QMainWindow):
            self.ui.actionSimulationSettings.setEnabled(False)
            self.ui.actionGraphParameters.setEnabled(False)
            self.ui.actionCompose.setEnabled(False)
+            self.ui.actionExportModel.setEnabled(False)
            self.ui.actionRunSimulation.setEnabled(False)
            self._update_edit_actions()
            return
@@ -318,6 +349,7 @@ class MainWindow(QMainWindow):
        self.ui.actionSimulationSettings.setEnabled(is_graph)
        self.ui.actionGraphParameters.setEnabled(is_graph)
        self.ui.actionCompose.setEnabled(is_graph)
+        self.ui.actionExportModel.setEnabled(is_graph)
        self.ui.actionRunSimulation.setEnabled(is_graph)
        self.ui.workspaceModeLabel.setText("Graph" if is_graph else "Text")
        self.ui.workspaceStack.setCurrentWidget(
@@ -505,6 +537,8 @@ class MainWindow(QMainWindow):
        if component is None:
            return
        self.ui.textDefinitionEditor.set_definition(
+            component.source.get("declarations", ""),
+            component.source.get("initialEquations", ""),
            component.source.get("equations", ""),
            component.inputs,
            component.outputs,
@@ -522,7 +556,8 @@ class MainWindow(QMainWindow):
        answer = QMessageBox.question(
            self,
            "Apply text component changes?",
-            "The text component has unapplied equation, port, or parameter changes.",
+            "The text component has unapplied declaration, initial-equation, "
+            "equation, port, or parameter changes.",
            QMessageBox.StandardButton.Apply
            | QMessageBox.StandardButton.Discard
            | QMessageBox.StandardButton.Cancel,
@@ -540,6 +575,8 @@ class MainWindow(QMainWindow):
                self.document_controller.replace_active_text_definition(
                    inputs,
                    outputs,
+                    self.ui.textDefinitionEditor.declarations,
+                    self.ui.textDefinitionEditor.initial_equations,
                    self.ui.textDefinitionEditor.equations,
                    self.ui.textDefinitionEditor.parameters,
                )
@@ -672,6 +709,8 @@ class MainWindow(QMainWindow):
        if scene is not None:
            scene.update()
        self.ui.graphView.viewport().update()
+        self.ui.textDefinitionEditor.ui.declarationsEdit.reload_highlighting()
+        self.ui.textDefinitionEditor.ui.initialEquationsEdit.reload_highlighting()
        self.ui.textDefinitionEditor.ui.equationsEdit.reload_highlighting()

    def _document_opened_changed(self, opened: bool) -> None:
--- a/BEdit/src/bedit/gui/simulation_window.py
+++ b/BEdit/src/bedit/gui/simulation_window.py
@@ -1,17 +1,33 @@
 import re
 from pathlib import Path

+from matplotlib.backend_bases import MouseButton
+from matplotlib.backends.backend_qtagg import FigureCanvasQTAgg, NavigationToolbar2QT
+from matplotlib.figure import Figure
 from PySide6.QtCore import Qt, Signal
-from PySide6.QtWidgets import QFileDialog, QMainWindow, QMessageBox
+from PySide6.QtGui import QCloseEvent
+from PySide6.QtWidgets import (
+    QFileDialog,
+    QInputDialog,
+    QMainWindow,
+    QMenu,
+    QMessageBox,
+    QTreeWidgetItem,
+    QVBoxLayout,
+    QWidget,
+)

 from bedit.core.simulation.openmodelica import SimulationMessage, SimulationProgress
 from bedit.core.simulation.results import (
    SimulationExecutionResult,
+    SimulationGraph,
    SimulationResults,
+    SimulationTrace,
    load_simulation_results,
    save_simulation_results,
 )
 from bedit.gui.generated.ui_simulation_window import Ui_SimulationWindow
+from bedit.gui.preferences import application_settings


 class SimulationWindow(QMainWindow):
@@ -26,9 +42,12 @@ class SimulationWindow(QMainWindow):
        super().__init__(parent)
        self.ui = Ui_SimulationWindow()
        self.ui.setupUi(self)
+        self.settings = application_settings()
        self._running = False
        self._run_generation = 0
        self._file_path: Path | None = None
+        self._rebuilding_graph_tabs = False
+        self._updating_signal_checks = False
        self.results = SimulationResults()
        self._connect_actions()
        self._populate_view_menu()
@@ -36,6 +55,7 @@ class SimulationWindow(QMainWindow):
            self.ui.statusDock, self.ui.logDock, Qt.Orientation.Vertical
        )
        self.ui.statusDock.setFixedHeight(self.ui.statusDock.sizeHint().height())
+        self._restore_window_layout()
        self.progressReceived.connect(self._show_progress)
        self.messageReceived.connect(self._show_message)
        self.simulationFinished.connect(self._show_finished)
@@ -52,19 +72,57 @@ class SimulationWindow(QMainWindow):
            lambda: QMessageBox.aboutQt(self, "About Qt Framework")
        )
        self.ui.actionToggleResults.toggled.connect(self.ui.centralWidget.setVisible)
+        self.ui.actionAddGraph.triggered.connect(self.add_graph_tab)
+        self.ui.actionRemoveGraph.triggered.connect(self.remove_current_graph_tab)
+        self.ui.graphTabs.tabBarDoubleClicked.connect(self.rename_graph_tab)
+        self.ui.graphTabs.tabBar().tabMoved.connect(self._move_graph_tab)
+        self.ui.graphTabs.currentChanged.connect(self._current_graph_changed)
+        self.ui.signalsTree.itemChanged.connect(self._signal_check_changed)
+        self.ui.signalsTree.customContextMenuRequested.connect(
+            self.show_signal_context_menu
+        )

    def _populate_view_menu(self) -> None:
        self.ui.menuPanels.addAction(self.ui.actionToggleResults)
-        for panel in (self.ui.statusDock, self.ui.logDock):
+        for panel in (self.ui.statusDock, self.ui.logDock, self.ui.signalsDock):
            self.ui.menuPanels.addAction(panel.toggleViewAction())
        self.ui.menuToolbars.addAction(self.ui.fileToolbar.toggleViewAction())
+        self.ui.menuToolbars.addAction(self.ui.workspaceToolbar.toggleViewAction())

-    def begin_run(self, model_name: str = "") -> tuple:
-        """Reset the viewer and return callbacks bound to this run."""
+    def _restore_window_layout(self) -> None:
+        geometry = self.settings.value("simulationWindow/geometry")
+        if geometry is not None:
+            self.restoreGeometry(geometry)
+        state = self.settings.value("simulationWindow/state")
+        if state is not None:
+            self.restoreState(state)
+        results_visible = self.settings.value(
+            "simulationWindow/resultsVisible", True, type=bool
+        )
+        self.ui.actionToggleResults.setChecked(results_visible)

-        self.clear(model_name=model_name)
+    def _save_window_layout(self) -> None:
+        self.settings.setValue("simulationWindow/geometry", self.saveGeometry())
+        self.settings.setValue("simulationWindow/state", self.saveState())
+        self.settings.setValue(
+            "simulationWindow/resultsVisible",
+            self.ui.actionToggleResults.isChecked(),
+        )
+        self.settings.sync()
+
+    def begin_run(self) -> tuple:
+        """Reset transient run state while retaining the current workspace."""
+
+        self._run_generation += 1
        generation = self._run_generation
        self._running = True
+        self._file_path = None
+        self.results.status = {}
+        self.results.messages.clear()
+        self.results.metadata.clear()
+        self.ui.progressBar.setValue(0)
+        self.ui.timeLabel.setText("Time: 0 s")
+        self.ui.messageList.clear()
        self.ui.statusLabel.setText("Preparing simulation…")
        return (
            lambda progress: self._report_progress(generation, progress),
@@ -73,9 +131,18 @@ class SimulationWindow(QMainWindow):
            lambda error: self._report_error(generation, error),
        )

-    def set_model_name(self, model_name: str | None) -> None:
-        if model_name:
+    def prepare_run_model(self, model_name: str | None) -> None:
+        """Retain graph configuration only when rerunning the same model."""
+
+        if not model_name:
+            return
+        if self.results.model_name != model_name:
+            self.results = SimulationResults(model_name=model_name)
+            self.clear_result_views()
+            self.load_result_views()
+        else:
            self.results.model_name = model_name
+        self.ui.statusLabel.setText("Preparing simulation…")
        self._update_title()

    def clear(self, checked: bool = False, *, model_name: str = "") -> None:
@@ -91,6 +158,7 @@ class SimulationWindow(QMainWindow):
        self.ui.timeLabel.setText("Time: 0 s")
        self.ui.messageList.clear()
        self.clear_result_views()
+        self.load_result_views()
        self._update_title()

    def clear_result_views(self) -> None:
@@ -100,9 +168,10 @@ class SimulationWindow(QMainWindow):
        ``resultsLayout`` and reset here.
        """

-        self.ui.resultsPlaceholder.setText(
-            "Simulation graphs and result controls can be added here."
-        )
+        self._rebuilding_graph_tabs = True
+        self._clear_graph_tab_widgets()
+        self._rebuilding_graph_tabs = False
+        self.ui.signalsTree.clear()

    def load_result_views(self) -> None:
        """Populate custom plots from ``self.results.data`` and traces.
@@ -110,14 +179,206 @@ class SimulationWindow(QMainWindow):
        This is the intended integration point for a future plotting widget.
        """

-        data_count = len(self.results.data)
-        trace_count = len(self.results.traces)
-        if data_count or trace_count:
-            sample_count = len(next(iter(self.results.data.values()), []))
-            self.ui.resultsPlaceholder.setText(
-                f"{data_count} data column(s), {sample_count} sample(s), and "
-                f"{trace_count} configured trace(s) loaded; add graph rendering here."
+        self._rebuild_graph_tabs()
+        self._rebuild_signal_tree()
+
+    def _rebuild_graph_tabs(self) -> None:
+        current_page = self.ui.graphTabs.currentWidget()
+        current_graph_id = (
+            current_page.graph_id
+            if isinstance(current_page, GraphWorkspacePage)
+            else None
        )
+        self._rebuilding_graph_tabs = True
+        self._clear_graph_tab_widgets()
+        for graph in self.results.graphs:
+            self.ui.graphTabs.addTab(
+                GraphWorkspacePage(graph, self.results), graph.title
+            )
+        if current_graph_id is not None:
+            for index, graph in enumerate(self.results.graphs):
+                if graph.id == current_graph_id:
+                    self.ui.graphTabs.setCurrentIndex(index)
+                    break
+        self._rebuilding_graph_tabs = False
+        self._update_graph_actions()
+        self._sync_signal_checks()
+
+    def _clear_graph_tab_widgets(self) -> None:
+        while self.ui.graphTabs.count():
+            page = self.ui.graphTabs.widget(0)
+            self.ui.graphTabs.removeTab(0)
+            page.deleteLater()
+
+    def add_graph_tab(self) -> None:
+        used_titles = {graph.title for graph in self.results.graphs}
+        number = 1
+        while f"Graph {number}" in used_titles:
+            number += 1
+        graph = SimulationGraph(title=f"Graph {number}")
+        self.results.graphs.append(graph)
+        index = self.ui.graphTabs.addTab(
+            GraphWorkspacePage(graph, self.results), graph.title
+        )
+        self.ui.graphTabs.setCurrentIndex(index)
+        self._update_graph_actions()
+
+    def remove_current_graph_tab(self) -> None:
+        index = self.ui.graphTabs.currentIndex()
+        if index < 0 or index >= len(self.results.graphs):
+            return
+        self.results.graphs.pop(index)
+        page = self.ui.graphTabs.widget(index)
+        self.ui.graphTabs.removeTab(index)
+        page.deleteLater()
+        self._update_graph_actions()
+        self._sync_signal_checks()
+
+    def rename_graph_tab(self, index: int) -> None:
+        if index < 0 or index >= len(self.results.graphs):
+            return
+        graph = self.results.graphs[index]
+        title, accepted = QInputDialog.getText(
+            self, "Rename Graph", "Title:", text=graph.title
+        )
+        title = title.strip()
+        if accepted and title:
+            graph.title = title
+            self.ui.graphTabs.setTabText(index, title)
+            page = self.ui.graphTabs.widget(index)
+            if isinstance(page, GraphWorkspacePage):
+                page.refresh_chart()
+
+    def _move_graph_tab(self, old_index: int, new_index: int) -> None:
+        if self._rebuilding_graph_tabs or old_index == new_index:
+            return
+        graph = self.results.graphs.pop(old_index)
+        self.results.graphs.insert(new_index, graph)
+        self._sync_signal_checks()
+
+    def _update_graph_actions(self) -> None:
+        self.ui.actionRemoveGraph.setEnabled(bool(self.results.graphs))
+
+    def _rebuild_signal_tree(self) -> None:
+        """Build a hierarchy while retaining each leaf's complete signal name."""
+
+        tree = self.ui.signalsTree
+        self._updating_signal_checks = True
+        try:
+            tree.clear()
+            items: dict[tuple[str, ...], QTreeWidgetItem] = {}
+            for signal_name in sorted(self.results.data, key=str.casefold):
+                parts = _signal_tree_parts(signal_name)
+                if not parts:
+                    continue
+                parent = tree.invisibleRootItem()
+                for depth, part in enumerate(parts, start=1):
+                    path = parts[:depth]
+                    item = items.get(path)
+                    if item is None:
+                        item = QTreeWidgetItem(parent, [part])
+                        items[path] = item
+                    parent = item
+                parent.setData(0, Qt.ItemDataRole.UserRole, signal_name)
+                parent.setToolTip(0, signal_name)
+                parent.setFlags(parent.flags() | Qt.ItemFlag.ItemIsUserCheckable)
+                parent.setCheckState(0, Qt.CheckState.Unchecked)
+            tree.expandToDepth(0)
+        finally:
+            self._updating_signal_checks = False
+        self._sync_signal_checks()
+
+    def _current_graph_changed(self, _index: int) -> None:
+        if not self._rebuilding_graph_tabs:
+            self._sync_signal_checks()
+
+    def _current_graph(self) -> SimulationGraph | None:
+        index = self.ui.graphTabs.currentIndex()
+        if 0 <= index < len(self.results.graphs):
+            return self.results.graphs[index]
+        return None
+
+    def _sync_signal_checks(self) -> None:
+        graph = self._current_graph()
+        enabled = {trace.name for trace in graph.traces} if graph else set()
+        self._updating_signal_checks = True
+        try:
+            root = self.ui.signalsTree.invisibleRootItem()
+            pending = [root.child(index) for index in range(root.childCount())]
+            while pending:
+                item = pending.pop()
+                pending.extend(
+                    item.child(index) for index in range(item.childCount())
+                )
+                signal_name = item.data(0, Qt.ItemDataRole.UserRole)
+                if isinstance(signal_name, str):
+                    item.setCheckState(
+                        0,
+                        Qt.CheckState.Checked
+                        if signal_name in enabled
+                        else Qt.CheckState.Unchecked,
+                    )
+        finally:
+            self._updating_signal_checks = False
+        self.ui.signalsTree.setEnabled(graph is not None)
+
+    def _signal_check_changed(self, item: QTreeWidgetItem, _column: int) -> None:
+        if self._updating_signal_checks:
+            return
+        signal_name = item.data(0, Qt.ItemDataRole.UserRole)
+        graph = self._current_graph()
+        if not isinstance(signal_name, str) or graph is None:
+            return
+        enabled = item.checkState(0) == Qt.CheckState.Checked
+        existing = next(
+            (trace for trace in graph.traces if trace.name == signal_name), None
+        )
+        if enabled and existing is None:
+            graph.traces.append(SimulationTrace(name=signal_name))
+        elif not enabled and existing is not None:
+            graph.traces.remove(existing)
+        page = self.ui.graphTabs.currentWidget()
+        if isinstance(page, GraphWorkspacePage):
+            page.refresh_chart()
+
+    def selected_signal_names(self) -> list[str]:
+        """Return full column names selected for future plotting actions."""
+
+        names = []
+        for item in self.ui.signalsTree.selectedItems():
+            name = item.data(0, Qt.ItemDataRole.UserRole)
+            if isinstance(name, str):
+                names.append(name)
+        return names
+
+    def show_signal_context_menu(self, position) -> None:
+        item = self.ui.signalsTree.itemAt(position)
+        signal_name = (
+            item.data(0, Qt.ItemDataRole.UserRole) if item is not None else None
+        )
+        graph = self._current_graph()
+        if not isinstance(signal_name, str) or graph is None:
+            return
+        menu = QMenu(self)
+        use_as_x_action = menu.addAction("Use as X Axis")
+        use_as_x_action.setCheckable(True)
+        use_as_x_action.setChecked(graph.x_axis == signal_name)
+        selected = menu.exec(
+            self.ui.signalsTree.viewport().mapToGlobal(position)
+        )
+        if selected is use_as_x_action:
+            self.set_x_axis_signal(signal_name)
+
+    def set_x_axis_signal(self, signal_name: str) -> None:
+        """Set the current graph's persisted horizontal data column."""
+
+        graph = self._current_graph()
+        if graph is None or signal_name not in self.results.data:
+            return
+        graph.x_axis = signal_name
+        page = self.ui.graphTabs.currentWidget()
+        if isinstance(page, GraphWorkspacePage):
+            page.refresh_chart()

    def open_results(self) -> None:
        file_name, _selected_filter = QFileDialog.getOpenFileName(
@@ -231,6 +492,19 @@ class SimulationWindow(QMainWindow):
        self.results.status.update(phase="Simulation finished", progress=10000)
        if isinstance(result, SimulationExecutionResult):
            self.results.data = result.data
+            available_signals = set(result.data)
+            for graph in self.results.graphs:
+                graph.traces = [
+                    trace
+                    for trace in graph.traces
+                    if trace.name in available_signals
+                ]
+                if graph.x_axis not in available_signals:
+                    graph.x_axis = (
+                        "time"
+                        if "time" in available_signals
+                        else next(iter(result.data), "")
+                    )
            self.results.metadata["processReturnCode"] = result.return_code
            self.results.metadata["sourceResultFile"] = Path(result.result_file).name
        else:
@@ -256,11 +530,197 @@ class SimulationWindow(QMainWindow):
            "<p>View live progress and open or save simulation results.</p>",
        )

+    def closeEvent(self, event: QCloseEvent) -> None:  # noqa: N802 (Qt API name)
+        self._save_window_layout()
+        super().closeEvent(event)
+
    @property
    def is_running(self) -> bool:
        return self._running


+class GraphWorkspacePage(QWidget):
+    """Matplotlib view of one persisted simulation graph definition."""
+
+    def __init__(
+        self, graph: SimulationGraph, results: SimulationResults, parent=None
+    ) -> None:
+        super().__init__(parent)
+        self.graph_id = graph.id
+        self.graph = graph
+        self.results = results
+        self.plot_layout = QVBoxLayout(self)
+        self.figure = Figure(layout="constrained")
+        self.canvas = InteractiveFigureCanvas(self.figure)
+        self.axes = self.figure.add_subplot(111)
+        self.canvas.axes = self.axes
+        self.navigation_toolbar = GraphNavigationToolbar(self.canvas, self)
+        self.canvas.navigation_toolbar = self.navigation_toolbar
+        self.plot_layout.addWidget(self.navigation_toolbar)
+        self.plot_layout.addWidget(self.canvas)
+        self.refresh_chart()
+
+    def refresh_chart(self) -> None:
+        self.axes.clear()
+        x_values = self.results.data.get(self.graph.x_axis)
+        for trace in self.graph.traces:
+            y_values = self.results.data.get(trace.name)
+            if y_values is None:
+                continue
+            horizontal = x_values if x_values is not None else range(len(y_values))
+            sample_count = min(len(horizontal), len(y_values))
+            color = trace.properties.get("color")
+            self.axes.plot(
+                list(horizontal)[:sample_count],
+                y_values[:sample_count],
+                label=trace.name,
+                color=color if isinstance(color, str) and color else None,
+            )
+        self.axes.set_title(self.graph.title)
+        self.axes.set_xlabel(self.graph.x_axis if x_values is not None else "sample")
+        self.axes.grid(True, alpha=0.25)
+        if self.axes.lines:
+            self.axes.legend()
+        self.axes.relim()
+        self.axes.autoscale_view()
+        self.canvas.set_home_view()
+        self.canvas.draw_idle()
+
+
+class GraphNavigationToolbar(NavigationToolbar2QT):
+    """Navigation toolbar whose Home action includes direct canvas navigation."""
+
+    def home(self, *args) -> None:
+        del args
+        self.canvas.reset_home_view()
+
+
+class InteractiveFigureCanvas(FigureCanvasQTAgg):
+    """Matplotlib canvas with always-available wheel zoom and drag pan."""
+
+    def __init__(self, figure: Figure) -> None:
+        super().__init__(figure)
+        self.axes = None
+        self.navigation_toolbar = None
+        self._pan_start = None
+        self._home_view = None
+        self.mpl_connect("scroll_event", self._zoom_at_cursor)
+        self.mpl_connect("button_press_event", self._start_pan)
+        self.mpl_connect("motion_notify_event", self._pan)
+        self.mpl_connect("button_release_event", self._finish_pan)
+
+    def _toolbar_is_active(self) -> bool:
+        return bool(
+            self.navigation_toolbar is not None
+            and self.navigation_toolbar.mode
+        )
+
+    def set_home_view(self) -> None:
+        if self.axes is not None:
+            self._home_view = (self.axes.get_xlim(), self.axes.get_ylim())
+
+    def reset_home_view(self) -> None:
+        if self.axes is None or self._home_view is None:
+            return
+        x_limits, y_limits = self._home_view
+        self.axes.set_xlim(x_limits)
+        self.axes.set_ylim(y_limits)
+        self.draw_idle()
+
+    def _zoom_at_cursor(self, event) -> None:
+        if (
+            self.axes is None
+            or event.inaxes is not self.axes
+            or event.xdata is None
+            or event.ydata is None
+            or self._toolbar_is_active()
+        ):
+            return
+        scale = 0.8 if event.button == "up" else 1.25
+        left, right = self.axes.get_xlim()
+        bottom, top = self.axes.get_ylim()
+        self.axes.set_xlim(
+            event.xdata - (event.xdata - left) * scale,
+            event.xdata + (right - event.xdata) * scale,
+        )
+        self.axes.set_ylim(
+            event.ydata - (event.ydata - bottom) * scale,
+            event.ydata + (top - event.ydata) * scale,
+        )
+        self.draw_idle()
+
+    def _start_pan(self, event) -> None:
+        if (
+            self.axes is None
+            or event.inaxes is not self.axes
+            or event.button != MouseButton.LEFT
+            or self._toolbar_is_active()
+        ):
+            return
+        self._pan_start = (
+            event.x,
+            event.y,
+            self.axes.get_xlim(),
+            self.axes.get_ylim(),
+        )
+
+    def _pan(self, event) -> None:
+        if (
+            self.axes is None
+            or self._pan_start is None
+            or event.x is None
+            or event.y is None
+        ):
+            return
+        start_x, start_y, x_limits, y_limits = self._pan_start
+        width = max(self.axes.bbox.width, 1.0)
+        height = max(self.axes.bbox.height, 1.0)
+        delta_x = (event.x - start_x) * (x_limits[1] - x_limits[0]) / width
+        delta_y = (event.y - start_y) * (y_limits[1] - y_limits[0]) / height
+        self.axes.set_xlim(x_limits[0] - delta_x, x_limits[1] - delta_x)
+        self.axes.set_ylim(y_limits[0] - delta_y, y_limits[1] - delta_y)
+        self.draw_idle()
+
+    def _finish_pan(self, _event) -> None:
+        self._pan_start = None
+
+
 def _safe_file_stem(model_name: str) -> str:
    stem = re.sub(r"[^A-Za-z0-9_.-]+", "_", model_name).strip("._")
    return stem or "simulation"
+
+
+def _signal_tree_parts(signal_name: str) -> tuple[str, ...]:
+    """Split a result name into readable component, variable, and index levels.
+
+    OpenModelica emits state derivatives as names such as ``der(block.x)``.
+    Keep those traces available, but display them below a ``Derivatives`` group
+    on their owning component instead of creating a misleading top-level
+    ``der(block`` branch.
+    """
+
+    derivative = re.fullmatch(r"der\((.+)\)", signal_name)
+    if derivative is not None:
+        inner_name = derivative.group(1)
+        inner_parts = _signal_tree_parts(inner_name)
+        if inner_parts:
+            index_count = len(re.findall(r"\[[^\]]+\]", inner_name.rsplit(".", 1)[-1]))
+            variable_index = max(0, len(inner_parts) - index_count - 1)
+            return (
+                *inner_parts[:variable_index],
+                "Derivatives",
+                *inner_parts[variable_index:],
+            )
+        return ("Derivatives", signal_name)
+
+    parts: list[str] = []
+    for segment in signal_name.split("."):
+        if not segment:
+            continue
+        match = re.fullmatch(r"([^\[]+)((?:\[[^\]]+\])+)", segment)
+        if match is None:
+            parts.append(segment)
+            continue
+        parts.append(match.group(1))
+        parts.extend(re.findall(r"\[([^\]]+)\]", match.group(2)))
+    return tuple(parts)
--- a/BEdit/ui/main_window.ui
+++ b/BEdit/ui/main_window.ui
@@ -552,6 +552,7 @@
    <addaction name="actionSimulationSettings"/>
    <addaction name="actionGraphParameters"/>
    <addaction name="actionCompose"/>
+    <addaction name="actionExportModel"/>
    <addaction name="actionSimulationWindow"/>
    <addaction name="actionRunSimulation"/>
   </widget>
@@ -715,6 +716,18 @@
    <string>Show the simulation results window</string>
   </property>
  </action>
+  <action name="actionExportModel">
+   <property name="icon">
+    <iconset resource="../resources/resources.qrc">
+     <normaloff>:/icons/icons/document-save-as.png</normaloff>:/icons/icons/document-save-as.png</iconset>
+   </property>
+   <property name="text">
+    <string>Export Model…</string>
+   </property>
+   <property name="statusTip">
+    <string>Save the composed OpenModelica model to a file</string>
+   </property>
+  </action>
  <action name="actionNew">
   <property name="icon">
    <iconset resource="../resources/resources.qrc">
--- a/BEdit/ui/simulation_window.ui
+++ b/BEdit/ui/simulation_window.ui
@@ -20,12 +20,12 @@
  <widget class="QWidget" name="centralWidget">
   <layout class="QVBoxLayout" name="resultsLayout">
    <item>
-     <widget class="QLabel" name="resultsPlaceholder">
-      <property name="text">
-       <string>Simulation graphs and result controls can be added here.</string>
+     <widget class="QTabWidget" name="graphTabs">
+      <property name="tabsClosable">
+       <bool>false</bool>
      </property>
-      <property name="alignment">
-       <set>Qt::AlignmentFlag::AlignCenter</set>
+      <property name="movable">
+       <bool>true</bool>
      </property>
     </widget>
    </item>
@@ -76,10 +76,34 @@
    <addaction name="actionAbout"/>
    <addaction name="actionAboutQt"/>
   </widget>
+   <widget class="QMenu" name="menuGraph">
+    <property name="title">
+     <string>&amp;Graph</string>
+    </property>
+    <addaction name="actionAddGraph"/>
+    <addaction name="actionRemoveGraph"/>
+   </widget>
   <addaction name="menuFile"/>
   <addaction name="menuView"/>
+   <addaction name="menuGraph"/>
   <addaction name="menuHelp"/>
  </widget>
+  <widget class="QToolBar" name="workspaceToolbar">
+   <property name="windowTitle">
+    <string>Workspace</string>
+   </property>
+   <property name="toolButtonStyle">
+    <enum>Qt::ToolButtonStyle::ToolButtonIconOnly</enum>
+   </property>
+   <attribute name="toolBarArea">
+    <enum>TopToolBarArea</enum>
+   </attribute>
+   <attribute name="toolBarBreak">
+    <bool>false</bool>
+   </attribute>
+   <addaction name="actionAddGraph"/>
+   <addaction name="actionRemoveGraph"/>
+  </widget>
  <widget class="QToolBar" name="fileToolbar">
   <property name="windowTitle">
    <string>File</string>
@@ -93,10 +117,10 @@
   <attribute name="toolBarBreak">
    <bool>false</bool>
   </attribute>
+   <addaction name="actionClear"/>
   <addaction name="actionOpen"/>
   <addaction name="actionSave"/>
   <addaction name="actionSaveAs"/>
-   <addaction name="actionClear"/>
  </widget>
  <widget class="QDockWidget" name="statusDock">
   <property name="windowTitle">
@@ -162,6 +186,36 @@
    </layout>
   </widget>
  </widget>
+  <widget class="QDockWidget" name="signalsDock">
+   <property name="windowTitle">
+    <string>Signals</string>
+   </property>
+   <attribute name="dockWidgetArea">
+    <number>2</number>
+   </attribute>
+   <widget class="QWidget" name="signalsDockContents">
+    <layout class="QVBoxLayout" name="signalsLayout">
+     <item>
+      <widget class="QTreeWidget" name="signalsTree">
+       <property name="contextMenuPolicy">
+        <enum>Qt::ContextMenuPolicy::CustomContextMenu</enum>
+       </property>
+       <property name="selectionMode">
+        <enum>QAbstractItemView::SelectionMode::ExtendedSelection</enum>
+       </property>
+       <property name="headerHidden">
+        <bool>true</bool>
+       </property>
+       <column>
+        <property name="text">
+         <string>Signal</string>
+        </property>
+       </column>
+      </widget>
+     </item>
+    </layout>
+   </widget>
+  </widget>
  <action name="actionOpen">
   <property name="icon">
    <iconset resource="../resources/resources.qrc">
@@ -236,6 +290,30 @@
    <string>Results</string>
   </property>
  </action>
+  <action name="actionAddGraph">
+   <property name="icon">
+    <iconset resource="../resources/resources.qrc">
+     <normaloff>:/icons/icons/list-add.png</normaloff>:/icons/icons/list-add.png</iconset>
+   </property>
+   <property name="text">
+    <string>Add Graph</string>
+   </property>
+   <property name="statusTip">
+    <string>Add a graph workspace tab</string>
+   </property>
+  </action>
+  <action name="actionRemoveGraph">
+   <property name="icon">
+    <iconset resource="../resources/resources.qrc">
+     <normaloff>:/icons/icons/list-remove.png</normaloff>:/icons/icons/list-remove.png</iconset>
+   </property>
+   <property name="text">
+    <string>Remove Current Graph</string>
+   </property>
+   <property name="statusTip">
+    <string>Remove the current graph workspace tab</string>
+   </property>
+  </action>
 </widget>
 <resources>
  <include location="../resources/resources.qrc"/>
--- a/BEdit/ui/text_definition_editor.ui
+++ b/BEdit/ui/text_definition_editor.ui
@@ -12,12 +12,28 @@
    <widget class="QSplitter" name="columnSplitter">
     <property name="orientation"><enum>Qt::Orientation::Horizontal</enum></property>
     <property name="childrenCollapsible"><bool>false</bool></property>
+     <widget class="QSplitter" name="sourceSplitter">
+      <property name="orientation"><enum>Qt::Orientation::Vertical</enum></property>
+      <property name="childrenCollapsible"><bool>false</bool></property>
+      <widget class="QGroupBox" name="declarationsGroup">
+       <property name="title"><string>Declarations</string></property>
+       <layout class="QVBoxLayout" name="declarationsLayout">
+        <item><widget class="OpenModelicaEditor" name="declarationsEdit"/></item>
+       </layout>
+      </widget>
+      <widget class="QGroupBox" name="initialEquationsGroup">
+       <property name="title"><string>Initial Equations</string></property>
+       <layout class="QVBoxLayout" name="initialEquationsLayout">
+        <item><widget class="OpenModelicaEditor" name="initialEquationsEdit"/></item>
+       </layout>
+      </widget>
      <widget class="QGroupBox" name="equationsGroup">
       <property name="title"><string>Equations</string></property>
       <layout class="QVBoxLayout" name="equationsLayout">
        <item><widget class="OpenModelicaEditor" name="equationsEdit"/></item>
       </layout>
      </widget>
+     </widget>
     <widget class="QSplitter" name="definitionSplitter">
      <property name="orientation"><enum>Qt::Orientation::Vertical</enum></property>
      <property name="childrenCollapsible"><bool>false</bool></property>
--- a/BEdit/untitled.bedit.json
+++ b/BEdit/untitled.bedit.json
@@ -165,7 +165,9 @@
              "implementation": {
                "kind": "text",
                "source": {
-                  "equations": "y = v;"
+                  "equations": "y = v;",
+                  "declarations": "",
+                  "initialEquations": ""
                }
              }
            },
@@ -270,7 +272,9 @@
              "implementation": {
                "kind": "text",
                "source": {
-                  "equations": "y = k*u;"
+                  "equations": "y = k*u;",
+                  "declarations": "",
+                  "initialEquations": ""
                }
              }
            },
@@ -377,7 +381,9 @@
              "implementation": {
                "kind": "text",
                "source": {
-                  "equations": "y = v+sin(time);"
+                  "equations": "y = v+sin(10*time);",
+                  "declarations": "",
+                  "initialEquations": ""
                }
              }
            },
@@ -482,7 +488,9 @@
              "implementation": {
                "kind": "text",
                "source": {
-                  "equations": "y = k*u;"
+                  "equations": "y = k*u;",
+                  "declarations": "",
+                  "initialEquations": ""
                }
              }
            },
@@ -579,7 +587,255 @@
              "implementation": {
                "kind": "text",
                "source": {
-                  "equations": "y = sum(u[i] for i in 1:$u_N$ );"
+                  "equations": "y = sum(u[i] for i in 1:$u_N$ );",
+                  "declarations": "",
+                  "initialEquations": ""
+                }
+              }
+            },
+            {
+              "id": "78c8fcb6-bd46-4b85-aa91-3276a8d1e8cb",
+              "name": "Integrate0",
+              "position": {
+                "x": 224.0,
+                "y": -96.0
+              },
+              "rotation": 0.0,
+              "interface": {
+                "inputs": [
+                  {
+                    "id": "port-df34ce84",
+                    "name": "u",
+                    "position": {
+                      "x": 0.0,
+                      "y": 0.0
+                    },
+                    "properties": {
+                      "iconPosition": {
+                        "x": 64.0,
+                        "y": 64.0
+                      }
+                    },
+                    "type": "signal",
+                    "multipleConnections": false
+                  }
+                ],
+                "outputs": [
+                  {
+                    "id": "port-fe9e6486",
+                    "name": "y",
+                    "position": {
+                      "x": 0.0,
+                      "y": 0.0
+                    },
+                    "properties": {
+                      "iconPosition": {
+                        "x": 88.0,
+                        "y": 40.0
+                      }
+                    },
+                    "type": "signal",
+                    "multipleConnections": false
+                  }
+                ]
+              },
+              "parameters": [
+                {
+                  "id": "parameter-61a43a86",
+                  "name": "y_start",
+                  "type": "real",
+                  "value": "0"
+                }
+              ],
+              "icon": {
+                "shape": "rectangle",
+                "fill": "#f4f4f4",
+                "border": "#303030",
+                "text": "Text",
+                "size": {
+                  "width": 128.0,
+                  "height": 128.0
+                },
+                "elements": [
+                  {
+                    "cornerRadius": 5.0,
+                    "fill": "#f4f4f4",
+                    "height": 64.0,
+                    "lineStyle": "solid",
+                    "lineWidth": 1.5,
+                    "stroke": "#303030",
+                    "type": "rectangle",
+                    "width": 64.0,
+                    "x": 32.0,
+                    "y": 32.0
+                  },
+                  {
+                    "color": "#00007f",
+                    "fill": "#ffffff",
+                    "fontSize": 24.0,
+                    "height": 48.0,
+                    "lineStyle": "solid",
+                    "lineWidth": 1.5,
+                    "stroke": "#00007f",
+                    "text": "dt",
+                    "type": "text",
+                    "width": 48.0,
+                    "x": 48.0,
+                    "y": 40.0
+                  },
+                  {
+                    "type": "text",
+                    "x": 32.0,
+                    "y": 32.0,
+                    "width": 32.0,
+                    "height": 56.0,
+                    "fill": "none",
+                    "stroke": "#00007f",
+                    "lineWidth": 1.5,
+                    "lineStyle": "none",
+                    "text": "\u222b",
+                    "fontSize": 35.0,
+                    "color": "#00007f"
+                  }
+                ]
+              },
+              "properties": {
+                "showName": true
+              },
+              "library": {
+                "showSubtree": true
+              },
+              "implementation": {
+                "kind": "text",
+                "source": {
+                  "equations": "der(y) = u;",
+                  "declarations": "",
+                  "initialEquations": "y = y_start;"
+                }
+              }
+            },
+            {
+              "id": "f2caf59f-5688-46b4-b17d-bdc911580d7b",
+              "name": "Differentiate0",
+              "position": {
+                "x": 224.0,
+                "y": 32.0
+              },
+              "rotation": 0.0,
+              "interface": {
+                "inputs": [
+                  {
+                    "id": "port-df34ce84",
+                    "name": "u",
+                    "position": {
+                      "x": 0.0,
+                      "y": 0.0
+                    },
+                    "properties": {
+                      "iconPosition": {
+                        "x": 64.0,
+                        "y": 64.0
+                      }
+                    },
+                    "type": "signal",
+                    "multipleConnections": false
+                  }
+                ],
+                "outputs": [
+                  {
+                    "id": "port-fe9e6486",
+                    "name": "y",
+                    "position": {
+                      "x": 0.0,
+                      "y": 0.0
+                    },
+                    "properties": {
+                      "iconPosition": {
+                        "x": 88.0,
+                        "y": 40.0
+                      }
+                    },
+                    "type": "signal",
+                    "multipleConnections": false
+                  }
+                ]
+              },
+              "parameters": [
+                {
+                  "id": "parameter-61a43a86",
+                  "name": "x_start",
+                  "type": "real",
+                  "value": "0"
+                },
+                {
+                  "id": "parameter-d110667b",
+                  "name": "y_start",
+                  "type": "real",
+                  "value": "0"
+                },
+                {
+                  "id": "parameter-873b503d",
+                  "name": "k",
+                  "type": "real",
+                  "value": "1"
+                },
+                {
+                  "id": "parameter-a55752c7",
+                  "name": "T",
+                  "type": "real",
+                  "value": "0.01"
+                }
+              ],
+              "icon": {
+                "shape": "rectangle",
+                "fill": "#f4f4f4",
+                "border": "#303030",
+                "text": "Text",
+                "size": {
+                  "width": 128.0,
+                  "height": 128.0
+                },
+                "elements": [
+                  {
+                    "cornerRadius": 5.0,
+                    "fill": "#f4f4f4",
+                    "height": 64.0,
+                    "lineStyle": "solid",
+                    "lineWidth": 1.5,
+                    "stroke": "#303030",
+                    "type": "rectangle",
+                    "width": 64.0,
+                    "x": 32.0,
+                    "y": 32.0
+                  },
+                  {
+                    "color": "#00007f",
+                    "fill": "#ffffff",
+                    "fontSize": 22.0,
+                    "height": 48.0,
+                    "lineStyle": "solid",
+                    "lineWidth": 1.5,
+                    "stroke": "#00007f",
+                    "text": "d/dt",
+                    "type": "text",
+                    "width": 64.0,
+                    "x": 32.0,
+                    "y": 40.0
+                  }
+                ]
+              },
+              "properties": {
+                "showName": true
+              },
+              "library": {
+                "showSubtree": true
+              },
+              "implementation": {
+                "kind": "text",
+                "source": {
+                  "equations": "assert(T > 0, \"Differentiate time constant T must be positive\");\n\nder(x) = (u - x)/T;\ny = (k/T)*(u - x);",
+                  "declarations": "Real x(start=x_start);",
+                  "initialEquations": "y = y_start;"
                }
              }
            }
@@ -644,6 +900,41 @@
              "properties": {
                "waypoints": []
              }
+            },
+            {
+              "id": "33e15cc2-7f33-469e-91a8-921c04f6b823",
+              "source": {
+                "block": "59bb51be-8185-4b0b-a894-e38db61aff18",
+                "port": "port-a2f0dea6"
+              },
+              "target": {
+                "block": "78c8fcb6-bd46-4b85-aa91-3276a8d1e8cb",
+                "port": "port-df34ce84"
+              },
+              "name": "",
+              "properties": {
+                "waypoints": []
+              }
+            },
+            {
+              "id": "26e10b34-f168-4492-b4f2-fb46d8a4aafa",
+              "source": {
+                "block": "59bb51be-8185-4b0b-a894-e38db61aff18",
+                "port": "port-a2f0dea6"
+              },
+              "target": {
+                "block": "f2caf59f-5688-46b4-b17d-bdc911580d7b",
+                "port": "port-df34ce84"
+              },
+              "name": "",
+              "properties": {
+                "waypoints": [
+                  {
+                    "x": 160.0,
+                    "y": 96.0
+                  }
+                ]
+              }
            }
          ],
          "annotations": [],
Author	SHA1	Message	Date
Joppe Blondel	48ac9e2f59	proper modelica text model editing	2026-07-21 17:16:06 +02:00
Joppe Blondel	2f6487e510	Added direct graph navigation without activating Matplotlib toolbar modes: Mouse wheel zooms in and out around the cursor. Left-click dragging pans the graph. Matplotlib toolbar modes still work and take precedence when activated. The existing Home button can reset the view.	2026-07-21 15:29:58 +02:00
Joppe Blondel	eb8f77ce64	better signal graphing	2026-07-21 15:24:24 +02:00
Joppe Blondel	35d933ccbb	Added signal graphing	2026-07-21 15:14:12 +02:00