New pipeline widget framework

negstation/widgets/base_widget.py

@@ -11,24 +11,68 @@ class BaseWidget:
     name: str = "BaseWidget"
     register: bool = False
 
-    def __init__(self, manager: "EditorManager", logger: logging.Logger):
+    def __init__(
+        self,
+        manager: "EditorManager",
+        logger: logging.Logger,
+        window_width: int = 300,
+        window_height: int = 200,
+    ):
         self.manager = manager
         self.logger = logger
+        self.window_width = window_width
+        self.window_height = window_height
+        self.window_offset_x = 0
+        self.window_offset_y = 0
         self.window_tag = dpg.generate_uuid()
         self.config = {}
 
     def create(self):
+        """Called by negstation itself, creates the window"""
+        with dpg.window(
+            label=self.name,
+            tag=self.window_tag,
+            width=self.window_width,
+            height=self.window_height,
+            on_close=self._on_window_close,
+        ):
+            self.window_handler = dpg.add_item_handler_registry()
+            dpg.add_item_resize_handler(
+                callback=self._on_window_resize, parent=self.window_handler
+            )
+            dpg.bind_item_handler_registry(self.window_tag, self.window_handler)
+
+            self.create_content()
+
+    def create_content(self):
+        """Must be implemented by the widget, creates the content of the window"""
         raise NotImplementedError
 
     def update(self):
+        """Must be implemented by the widget, is called in the render loop every frame"""
         pass
 
+    def on_resize(self, width: int, height: int):
+        """Must be implemented by the widget, is called after a resize"""
+        pass
+
+    # Internal but public funtions
+
     def get_config(self):
+        """Caled by negstation itself, returns the saved widget config"""
         return self.config
 
+    # Callbacks
+
     def _on_window_close(self):
         try:
             dpg.delete_item(self.window_tag)
             self.manager.widgets.remove(self)
         except ValueError:
             pass
+
+    def _on_window_resize(self, data):
+        win_w, win_h = dpg.get_item_rect_size(self.window_tag)
+        self.window_height = win_h
+        self.window_width = win_w
+        self.on_resize(win_w, win_h)