raylib home ui: show/hide events (#36058)

* it's a widget

* proper events

* bottom

selfdrive/ui/layouts/main.py

@@ -63,14 +63,20 @@ class MainLayout(Widget):
       # Don't hide sidebar from interactive timeout
       if self._current_mode != MainState.ONROAD:
         self._sidebar.set_visible(False)
-      self._current_mode = MainState.ONROAD
+      self._set_current_layout(MainState.ONROAD)
     else:
-      self._current_mode = MainState.HOME
+      self._set_current_layout(MainState.HOME)
       self._sidebar.set_visible(True)
 
+  def _set_current_layout(self, layout: MainState):
+    if layout != self._current_mode:
+      self._layouts[self._current_mode].hide_event()
+      self._current_mode = layout
+      self._layouts[self._current_mode].show_event()
+
   def open_settings(self, panel_type: PanelType):
     self._layouts[MainState.SETTINGS].set_current_panel(panel_type)
-    self._current_mode = MainState.SETTINGS
+    self._set_current_layout(MainState.SETTINGS)
     self._sidebar.set_visible(False)
 
   def _on_settings_clicked(self):

selfdrive/ui/layouts/settings/settings.py

@@ -44,7 +44,7 @@ class PanelType(IntEnum):
 @dataclass
 class PanelInfo:
   name: str
-  instance: object
+  instance: Widget
   button_rect: rl.Rectangle = rl.Rectangle(0, 0, 0, 0)
 
 
@@ -153,8 +153,14 @@ class SettingsLayout(Widget):
 
   def set_current_panel(self, panel_type: PanelType):
     if panel_type != self._current_panel:
+      self._panels[self._current_panel].instance.hide_event()
       self._current_panel = panel_type
+      self._panels[self._current_panel].instance.show_event()
 
-  def close_settings(self):
-    if self._close_callback:
-      self._close_callback()
+  def show_event(self):
+    super().show_event()
+    self._panels[self._current_panel].instance.show_event()
+
+  def hide_event(self):
+    super().hide_event()
+    self._panels[self._current_panel].instance.hide_event()

system/ui/widgets/__init__.py

@@ -129,3 +129,10 @@ class Widget(abc.ABC):
   def _handle_mouse_release(self, mouse_pos: MousePos) -> bool:
     """Optionally handle mouse release events."""
     return False
+
+  def show_event(self):
+    """Optionally handle show event. Parent must manually call this"""
+
+  def hide_event(self):
+    """Optionally handle hide event. Parent must manually call this"""
+