fix(lua): Store and update the 'zone' rectangle for Lua widgets. (#3060)

* Store 'zone' rectangle dat in Lua registry and update it when the screen layout changes or full screen mode changes. Allows Lua widgets to adjust to layout changes.

* Call widget 'update' function is layout has changed.

radio/src/gui/colorlcd/widget.cpp

@@ -98,10 +98,6 @@ void Widget::onCancel()
 
 void Widget::update()
 {
-  auto container = dynamic_cast<WidgetsContainer*>(parent);
-  if (container) {
-    container->updateZones();
-  }
 }
 
 void Widget::setFullscreen(bool enable)
@@ -113,7 +109,10 @@ void Widget::setFullscreen(bool enable)
   if (!enable) {
 
     // Reset all zones in container
-    Widget::update();
+    auto container = dynamic_cast<WidgetsContainer*>(parent);
+    if (container)
+      container->updateZones();
+
     setWindowFlags(getWindowFlags() & ~OPAQUE);
     lv_obj_set_style_bg_opa(lvobj, LV_OPA_0, LV_PART_MAIN);
 
@@ -135,9 +134,10 @@ void Widget::setFullscreen(bool enable)
   // Enter Fullscreen Mode
   else {
 
-    // Set window opaque (inhibits redraw from windows bellow)
+    // Set window opaque (inhibits redraw from windows below)
     setWindowFlags(getWindowFlags() | OPAQUE);
     lv_obj_set_style_bg_opa(lvobj, LV_OPA_MAX, LV_PART_MAIN);
+    updateZoneRect(parent->getRect());
     setRect(parent->getRect());
     fullscreen = true;
 

radio/src/gui/colorlcd/widget.h

@@ -106,6 +106,9 @@ class Widget : public Button
     // Called at regular time interval, even if the widget cannot be seen
     virtual void background() {}
 
+    // Update widget 'zone' data (for Lua widgets)
+    virtual void updateZoneRect(rect_t rect) {}
+
   protected:
     const WidgetFactory * factory;
     PersistentData * persistentData;

radio/src/gui/colorlcd/widgets/widgets_container_impl.h

@@ -136,6 +136,7 @@ class WidgetsContainerImpl : public WidgetsContainer
       if (widgets[i]) {
         auto zone = getZone(i);
         widgets[i]->setRect(zone);
+        widgets[i]->updateZoneRect(zone);
       }
     }
   }