widget preview while setting up

radio/src/gui/colorlcd/screen_setup.cpp

@@ -155,23 +155,21 @@ class SetupWidgetsPageSlot: public Button
       screen(screen),
       slotIndex(slotIndex)
     {
+      widget = screen->getWidget(slotIndex);
       setPressHandler([=](){
           Menu * menu = new Menu(this);
           menu->addLine("Select a widget", [=]() {
             Menu * menu = new Menu(this);
             for (auto factory: getRegisteredWidgets()) {
               menu->addLine(factory->getName(), [=]() {
-                if (widget) {
-                  widget->deleteLater();
-                }
-                // widget = factory->create(this, {1, 1, width() - 2, height() - 2}, &g_model.screenData[pageIndex].layoutData.zones[slotIndex].widgetData, true);
-                screen->createWidget(slotIndex, factory);
+                if (widget) widget->deleteLater();
+                widget = screen->createWidget(slotIndex, factory);
                 return 0;
               });
             }
             return 0;
           });
-          if (widget /*g_model.screenData[pageIndex].layoutData.zones[slotIndex].widgetName[0]*/) {
+          if (widget) {
             menu->addLine(STR_DELETE, [=]() {
               widget->deleteLater();
               widget = nullptr;
@@ -190,12 +188,14 @@ class SetupWidgetsPageSlot: public Button
       else {
         dc->drawRect(0, 0, width(), height(), 1, DOTTED, DEFAULT_COLOR);
       }
+      if (widget)
+        widget->paint(dc);
     }
 
   protected:
     Layout * screen;
     uint8_t slotIndex;
-    Window * widget = nullptr;
+    Widget * widget = nullptr;
 };
 
 class SetupWidgetsPage: public FormWindow

radio/src/gui/colorlcd/widget.h

@@ -71,6 +71,16 @@ class Widget : public FormField
       return &persistentData->options[index].value;
     }
 
+    inline PersistentData * getPersistentData()
+    {
+      return persistentData;
+    }
+    
+    void paint(BitmapBuffer * dc) override
+    {
+      FormField::paint(dc);
+    }
+  
     virtual void background()
     {
     }

radio/src/gui/colorlcd/widgets_container.h

@@ -30,7 +30,8 @@ class WidgetsContainerInterface
   public:
     virtual unsigned int getZonesCount() const = 0;
     virtual rect_t getZone(unsigned int index) const = 0;
-    virtual void createWidget(unsigned int index, const WidgetFactory * factory) = 0;
+    virtual Widget * createWidget(unsigned int index, const WidgetFactory * factory) = 0;
+    virtual Widget * getWidget(unsigned int index) = 0;
 };
 
 #define WIDGET_NAME_LEN   10
@@ -55,16 +56,25 @@ class WidgetsContainer: public FormGroup, public WidgetsContainerInterface
     {
     }
 
-    void createWidget(unsigned int index, const WidgetFactory * factory) override
+    Widget * createWidget(unsigned int index, const WidgetFactory * factory) override
     {
+      Widget * widget = nullptr;
       memset(persistentData->zones[index].widgetName, 0, sizeof(persistentData->zones[index].widgetName));
       if (factory) {
         strncpy(persistentData->zones[index].widgetName, factory->getName(), sizeof(persistentData->zones[index].widgetName));
-        widgets[index] = factory->create(this, getZone(index), &persistentData->zones[index].widgetData);
-      }
-      else {
-        widgets[index] = nullptr;
+        widget = factory->create(this, getZone(index), &persistentData->zones[index].widgetData);
       }
+      widgets[index] = widget;
+
+      return widget;
+    }
+
+    Widget * getWidget(unsigned int index) override
+    {
+      if (index < N)
+        return widgets[index];
+
+      return nullptr;
     }
 
     virtual void create()