canvas: Event improvements and new events (dragstart, dragend)

simgear/canvas/CanvasEvent.hxx

@@ -65,6 +65,11 @@ namespace canvas
       // of the actual event instances.
       virtual ~Event();
 
+      /**
+       * Clone event and set to the given type (Same type if not specified)
+       */
+      virtual Event* clone(int type = 0) const = 0;
+
       /**
        * Get whether this events support bubbling
        */

simgear/canvas/CanvasEventManager.cxx

@@ -114,6 +114,8 @@ namespace canvas
         return handled;
       }
       case Event::DRAG:
+      case Event::DRAG_START:
+      case Event::DRAG_END:
         if( !_last_mouse_down.valid() )
           return false;
         else

simgear/canvas/CanvasEventTypes.hxx

@@ -25,6 +25,8 @@ ENUM_MAPPING(MOUSE_UP,    "mouseup",    MouseEvent)
 ENUM_MAPPING(CLICK,       "click",      MouseEvent)
 ENUM_MAPPING(DBL_CLICK,   "dblclick",   MouseEvent)
 ENUM_MAPPING(DRAG,        "drag",       MouseEvent)
+ENUM_MAPPING(DRAG_START,  "dragstart",  MouseEvent)
+ENUM_MAPPING(DRAG_END,    "dragend",    MouseEvent)
 ENUM_MAPPING(WHEEL,       "wheel",      MouseEvent)
 ENUM_MAPPING(MOUSE_MOVE,  "mousemove",  MouseEvent)
 ENUM_MAPPING(MOUSE_OVER,  "mouseover",  MouseEvent)

simgear/canvas/CanvasWindow.cxx

@@ -212,6 +212,19 @@ namespace canvas
       _resize_left = getRegion().l() + offset.x();
   }
 
+  //----------------------------------------------------------------------------
+  bool Window::handleEvent(const EventPtr& event)
+  {
+    if( auto mouse_event = dynamic_cast<MouseEvent*>(event.get()) )
+    {
+      mouse_event->local_pos =
+      mouse_event->client_pos =
+        mouse_event->screen_pos - toOsg(getPosition());
+    }
+
+    return Image::handleEvent(event);
+  }
+
   //----------------------------------------------------------------------------
   void Window::parseDecorationBorder(const std::string& str)
   {

simgear/canvas/CanvasWindow.hxx

@@ -96,6 +96,8 @@ namespace canvas
       void handleResize( uint8_t mode,
                          const osg::Vec2f& offset = osg::Vec2f() );
 
+      bool handleEvent(const EventPtr& event) override;
+
     protected:
 
       enum Attributes

simgear/canvas/elements/CanvasElement.cxx

@@ -271,8 +271,7 @@ namespace canvas
   //----------------------------------------------------------------------------
   void Element::setFocus()
   {
-    CanvasPtr canvas = _canvas.lock();
+    if( auto canvas = _canvas.lock() )
-    if( canvas )
       canvas->setFocusElement(this);
   }
 

simgear/canvas/elements/CanvasImage.hxx

@@ -93,7 +93,7 @@ namespace canvas
 
       const SGRect<float>& getRegion() const;
 
-      bool handleEvent(const EventPtr& event);
+      bool handleEvent(const EventPtr& event) override;
 
       /**
        *

simgear/canvas/events/CustomEvent.cxx

@@ -46,6 +46,14 @@ namespace canvas
 //    assert( type_map.find(type_id) != type_map.end() );
   }
 
+  //----------------------------------------------------------------------------
+  CustomEvent* CustomEvent::clone(int type) const
+  {
+    auto event = new CustomEvent(*this);
+    event->type = type;
+    return event;
+  }
+
   //----------------------------------------------------------------------------
   void CustomEvent::setDetail(StringMap const& data)
   {

simgear/canvas/events/CustomEvent.hxx

@@ -58,6 +58,8 @@ namespace canvas
                    bool bubbles = false,
                    StringMap const& data = StringMap() );
 
+      CustomEvent* clone(int type = 0) const override;
+
       /**
        * Set user data
        */

simgear/canvas/events/KeyboardEvent.cxx

@@ -69,6 +69,14 @@ namespace canvas
 //      // TODO what to do with wrong event type?
   }
 
+  //----------------------------------------------------------------------------
+  KeyboardEvent* KeyboardEvent::clone(int type) const
+  {
+    auto event = new KeyboardEvent(*this);
+    event->type = type;
+    return event;
+  }
+
   //----------------------------------------------------------------------------
   void KeyboardEvent::setKey(uint32_t key)
   {

simgear/canvas/events/KeyboardEvent.hxx

@@ -45,6 +45,7 @@ namespace canvas
 
       KeyboardEvent();
       KeyboardEvent(const osgGA::GUIEventAdapter& ea);
+      KeyboardEvent* clone(int type = 0) const override;
 
       void setKey(uint32_t key);
       void setUnmodifiedKey(uint32_t key);

simgear/canvas/events/MouseEvent.cxx

@@ -48,6 +48,14 @@ namespace canvas
       button += 1;
   }
 
+  //----------------------------------------------------------------------------
+  MouseEvent* MouseEvent::clone(int type) const
+  {
+    auto event = new MouseEvent(*this);
+    event->type = type;
+    return event;
+  }
+
   //----------------------------------------------------------------------------
   bool MouseEvent::canBubble() const
   {

simgear/canvas/events/MouseEvent.hxx

@@ -36,6 +36,7 @@ namespace canvas
     public:
       MouseEvent();
       MouseEvent(const osgGA::GUIEventAdapter& ea);
+      MouseEvent* clone(int type = 0) const override;
 
       virtual bool canBubble() const;