drag fixes

modules/core_widgets/uiitem.lua

@@ -2,7 +2,7 @@ function UIItem:onDragEnter(mousePos)
   if self:isVirtual() then return false end
 
   local item = self:getItem()
-  if not item then return true end
+  if not item then return false end
 
   self:setBorderWidth(1)
 

modules/core_widgets/uiminiwindow.lua

@@ -24,6 +24,7 @@ function UIMiniWindow:onDragEnter(mousePos)
   local oldPos = self:getPosition()
   self.movingReference = { x = mousePos.x - oldPos.x, y = mousePos.y - oldPos.y }
   self:setPosition(oldPos)
+  return true
 end
 
 function UIMiniWindow:onDragLeave(droppedWidget, mousePos)

modules/core_widgets/uiwindow.lua

@@ -25,6 +25,7 @@ end
 function UIWindow:onDragEnter(mousePos)
   self:breakAnchors()
   self.movingReference = { x = mousePos.x - self:getX(), y = mousePos.y - self:getY() }
+  return true
 end
 
 function UIWindow:onDragLeave(droppedWidget, mousePos)

src/framework/ui/uimanager.cpp

@@ -26,6 +26,7 @@
 #include <framework/otml/otml.h>
 #include <framework/graphics/graphics.h>
 #include <framework/platform/platformwindow.h>
+#include <framework/core/eventdispatcher.h>
 
 UIManager g_ui;
 
@@ -78,8 +79,12 @@ void UIManager::inputEvent(const InputEvent& event)
             break;
         case Fw::MousePressInputEvent:
             m_mouseReceiver->propagateOnMousePress(event.mousePos, event.mouseButton);
-            if(event.mouseButton == Fw::MouseLeftButton)
+            if(event.mouseButton == Fw::MouseLeftButton && m_mouseReceiver->isVisible()) {
-                updatePressedWidget(m_mouseReceiver->recursiveGetChildByPos(event.mousePos), event.mousePos);
+                UIWidgetPtr pressedWidget = m_mouseReceiver->recursiveGetChildByPos(event.mousePos);
+                if(pressedWidget && !pressedWidget->isEnabled())
+                    pressedWidget = nullptr;
+                updatePressedWidget(pressedWidget, event.mousePos);
+            }
             break;
         case Fw::MouseReleaseInputEvent:
             m_mouseReceiver->propagateOnMouseRelease(event.mousePos, event.mouseButton);
@@ -123,18 +128,32 @@ void UIManager::updatePressedWidget(const UIWidgetPtr& newPressedWidget, const P
     if(oldPressedWidget) {
         oldPressedWidget->updateState(Fw::PressedState);
 
+        if(oldPressedWidget->isEnabled()) {
             // when releasing mouse inside pressed widget area send onClick event
-        if(!clickedPos.isNull() && oldPressedWidget->containsPoint(clickedPos))
+            if(!clickedPos.isNull() && oldPressedWidget->containsPoint(clickedPos)) {
+                // onMouseRelease will be already fired by mouseReceiver
                 oldPressedWidget->onClick(clickedPos);
             // must send mouse events even if the mouse is outside widget area when releasing a pressed widget
-        else
+            } else
                 oldPressedWidget->onMouseRelease(clickedPos, Fw::MouseLeftButton);
         }
     }
+}
 
 void UIManager::updateHoveredWidget()
 {
+    if(m_hoverUpdateScheduled)
+        return;
+
+    g_dispatcher.addEvent([this] {
+        if(!m_rootWidget)
+            return;
+
+        m_hoverUpdateScheduled = false;
         UIWidgetPtr hoveredWidget = m_rootWidget->recursiveGetChildByPos(g_window.getMousePosition());
+        if(hoveredWidget && !hoveredWidget->isEnabled())
+            hoveredWidget = nullptr;
+
         if(hoveredWidget != m_hoveredWidget) {
             UIWidgetPtr oldHovered = m_hoveredWidget;
             m_hoveredWidget = hoveredWidget;
@@ -143,54 +162,46 @@ void UIManager::updateHoveredWidget()
             if(hoveredWidget)
                 hoveredWidget->updateState(Fw::HoverState);
         }
+    });
+    m_hoverUpdateScheduled = true;
 }
 
 void UIManager::updateDraggingWidget(const UIWidgetPtr& draggingWidget, const Point& clickedPos)
 {
     UIWidgetPtr oldDraggingWidget = m_draggingWidget;
+    m_draggingWidget = nullptr;
     if(oldDraggingWidget) {
-        auto clickedChildren = m_rootWidget->recursiveGetChildrenByPos(clickedPos);
         UIWidgetPtr droppedWidget;
+        if(!clickedPos.isNull()) {
+            auto clickedChildren = m_rootWidget->recursiveGetChildrenByPos(clickedPos);
             for(const UIWidgetPtr& child : clickedChildren) {
                 if(child->onDrop(oldDraggingWidget, clickedPos)) {
                     droppedWidget = child;
                     break;
                 }
             }
-
-        oldDraggingWidget->onDragLeave(droppedWidget, clickedPos);
         }
 
-    m_draggingWidget = draggingWidget;
+        oldDraggingWidget->onDragLeave(droppedWidget, clickedPos);
-
-    if(oldDraggingWidget)
         oldDraggingWidget->updateState(Fw::DraggingState);
+    }
 
     if(draggingWidget) {
+        if(draggingWidget->onDragEnter(clickedPos)) {
+            m_draggingWidget = draggingWidget;
             draggingWidget->updateState(Fw::DraggingState);
-        draggingWidget->onDragEnter(clickedPos);
+        }
     }
 }
 
 void UIManager::onWidgetAppear(const UIWidgetPtr& widget)
 {
-    if(widget->getRootParent() != m_rootWidget || !widget->isVisible())
-        return;
-
-    if(widget->getRect().contains(g_window.getMousePosition()))
     updateHoveredWidget();
 }
 
 void UIManager::onWidgetDisappear(const UIWidgetPtr& widget)
 {
-    if(widget->getRootParent() != m_rootWidget || widget->isVisible())
-        return;
-
-    if(m_hoveredWidget == widget)
     updateHoveredWidget();
-
-    if(m_pressedWidget == widget)
-        updatePressedWidget(nullptr);
 }
 
 void UIManager::onWidgetDestroy(const UIWidgetPtr& widget)
@@ -207,6 +218,9 @@ void UIManager::onWidgetDestroy(const UIWidgetPtr& widget)
 
     if(m_pressedWidget == widget)
         updatePressedWidget(nullptr);
+
+    if(m_draggingWidget == widget)
+        updateDraggingWidget(nullptr);
 }
 
 bool UIManager::importStyle(const std::string& file)

src/framework/ui/uimanager.h

@@ -39,7 +39,7 @@ public:
 
     void updatePressedWidget(const UIWidgetPtr& newPressedWidget, const Point& clickedPos = Point());
     void updateHoveredWidget();
-    void updateDraggingWidget(const UIWidgetPtr& draggingWidget, const Point& clickedPos);
+    void updateDraggingWidget(const UIWidgetPtr& draggingWidget, const Point& clickedPos = Point());
 
     bool importStyle(const std::string& file);
     void importStyleFromOTML(const OTMLNodePtr& styleNode);
@@ -78,6 +78,7 @@ private:
     UIWidgetPtr m_draggingWidget;
     UIWidgetPtr m_hoveredWidget;
     UIWidgetPtr m_pressedWidget;
+    Boolean<false> m_hoverUpdateScheduled;
     bool m_isOnInputEvent;
     Boolean<false> m_drawDebugBoxes;
     std::map<std::string, OTMLNodePtr> m_styles;

src/framework/ui/uiwidget.cpp

@@ -571,9 +571,6 @@ void UIWidget::grabMouse()
 
 void UIWidget::ungrabMouse()
 {
-    if(m_destroyed)
-        return;
-
     if(g_ui.getMouseReceiver() == asUIWidget())
         g_ui.resetMouseReceiver();
 }
@@ -588,9 +585,6 @@ void UIWidget::grabKeyboard()
 
 void UIWidget::ungrabKeyboard()
 {
-    if(m_destroyed)
-        return;
-
     if(g_ui.getKeyboardReceiver() == asUIWidget())
         g_ui.resetKeyboardReceiver();
 }
@@ -756,6 +750,7 @@ void UIWidget::setEnabled(bool enabled)
 
         updateState(Fw::DisabledState);
         updateState(Fw::ActiveState);
+        updateState(Fw::HoverState);
     }
 }
 
@@ -764,12 +759,6 @@ void UIWidget::setVisible(bool visible)
     if(m_visible != visible) {
         m_visible = visible;
 
-        // visibility can change the current hovered widget
-        if(visible)
-            g_ui.onWidgetAppear(asUIWidget());
-        else
-            g_ui.onWidgetDisappear(asUIWidget());
-
         // hiding a widget make it lose focus
         if(!visible && isFocused()) {
             if(UIWidgetPtr parent = getParent())
@@ -780,6 +769,12 @@ void UIWidget::setVisible(bool visible)
         updateParentLayout();
 
         updateState(Fw::ActiveState);
+
+        // visibility can change the current hovered widget
+        if(visible)
+            g_ui.onWidgetAppear(asUIWidget());
+        else
+            g_ui.onWidgetDisappear(asUIWidget());
     }
 }
 
@@ -1033,7 +1028,7 @@ void UIWidget::updateState(Fw::WidgetState state)
                 }
             } while(widget = parent);
 
-            updateChildren = true;
+            updateChildren = newStatus != oldStatus;
             break;
         }
         case Fw::FocusState: {
@@ -1041,7 +1036,8 @@ void UIWidget::updateState(Fw::WidgetState state)
             break;
         }
         case Fw::HoverState: {
-            newStatus = (g_ui.getHoveredWidget() == asUIWidget());
+            updateChildren = true;
+            newStatus = (g_ui.getHoveredWidget() == asUIWidget() && isEnabled());
             break;
         }
         case Fw::PressedState: {
@@ -1054,7 +1050,6 @@ void UIWidget::updateState(Fw::WidgetState state)
         }
         case Fw::DisabledState: {
             bool enabled = true;
-            updateChildren = true;
             UIWidgetPtr widget = asUIWidget();
             do {
                 if(!widget->isExplicitlyEnabled()) {
@@ -1063,6 +1058,7 @@ void UIWidget::updateState(Fw::WidgetState state)
                 }
             } while(widget = widget->getParent());
             newStatus = !enabled;
+            updateChildren = newStatus != oldStatus;
             break;
         }
         case Fw::FirstState: {
@@ -1085,7 +1081,6 @@ void UIWidget::updateState(Fw::WidgetState state)
             return;
     }
 
-    if(setState(state, newStatus)) {
     if(updateChildren) {
         // do a backup of children list, because it may change while looping it
         UIWidgetList children = m_children;
@@ -1093,6 +1088,7 @@ void UIWidget::updateState(Fw::WidgetState state)
             child->updateState(state);
     }
 
+    if(setState(state, newStatus)) {
         if(state == Fw::FocusState) {
             g_dispatcher.addEvent(std::bind(&UIWidget::onFocusChange, asUIWidget(), newStatus, m_lastFocusReason));
         } else if(state == Fw::HoverState)
@@ -1200,105 +1196,66 @@ void UIWidget::onStyleApply(const std::string& styleName, const OTMLNodePtr& sty
 
 void UIWidget::onGeometryChange(const Rect& oldRect, const Rect& newRect)
 {
-    if(m_destroyed)
-        return;
-
     callLuaField("onGeometryChange", oldRect, newRect);
 }
 
 void UIWidget::onFocusChange(bool focused, Fw::FocusReason reason)
 {
-    if(m_destroyed)
-        return;
-
     callLuaField("onFocusChange", focused, reason);
 }
 
 void UIWidget::onChildFocusChange(const UIWidgetPtr& focusedChild, const UIWidgetPtr& unfocusedChild, Fw::FocusReason reason)
 {
-    if(m_destroyed)
-        return;
-
     callLuaField("onChildFocusChange", focusedChild, unfocusedChild, reason);
 }
 
 void UIWidget::onHoverChange(bool hovered)
 {
-    if(m_destroyed)
-        return;
-
     callLuaField("onHoverChange", hovered);
 }
 
-void UIWidget::onDragEnter(const Point& mousePos)
+bool UIWidget::onDragEnter(const Point& mousePos)
 {
-    if(m_destroyed)
+    return callLuaField<bool>("onDragEnter", mousePos);
-        return;
-
-    callLuaField("onDragEnter", mousePos);
 }
 
 void UIWidget::onDragLeave(UIWidgetPtr droppedWidget, const Point& mousePos)
 {
-    if(m_destroyed)
-        return;
-
     callLuaField("onDragLeave", droppedWidget, mousePos);
 }
 
 bool UIWidget::onDragMove(const Point& mousePos, const Point& mouseMoved)
 {
-    if(m_destroyed)
-        return false;
-
     return callLuaField("onDragMove", mousePos, mouseMoved);
 }
 
 bool UIWidget::onDrop(UIWidgetPtr draggedWidget, const Point& mousePos)
 {
-    if(m_destroyed)
-        return false;
-
     return callLuaField<bool>("onDrop", draggedWidget, mousePos);
 }
 
 bool UIWidget::onKeyText(const std::string& keyText)
 {
-    if(m_destroyed)
-        return false;
-
     return callLuaField<bool>("onKeyText", keyText);
 }
 
 bool UIWidget::onKeyDown(uchar keyCode, int keyboardModifiers)
 {
-    if(m_destroyed)
-        return false;
-
     return callLuaField<bool>("onKeyDown", keyCode, keyboardModifiers);
 }
 
 bool UIWidget::onKeyPress(uchar keyCode, int keyboardModifiers, int autoRepeatTicks)
 {
-    if(m_destroyed)
-        return false;
-
     return callLuaField<bool>("onKeyPress", keyCode, keyboardModifiers, autoRepeatTicks);
 }
 
 bool UIWidget::onKeyUp(uchar keyCode, int keyboardModifiers)
 {
-    if(m_destroyed)
-        return false;
-
     return callLuaField<bool>("onKeyUp", keyCode, keyboardModifiers);
 }
 
 bool UIWidget::onMousePress(const Point& mousePos, Fw::MouseButton button)
 {
-    if(m_destroyed)
-        return false;
-
     if(button == Fw::MouseLeftButton) {
         if(m_clickTimer.running() && m_clickTimer.ticksElapsed() <= 500) {
             if(onDoubleClick(mousePos))
@@ -1315,41 +1272,26 @@ bool UIWidget::onMousePress(const Point& mousePos, Fw::MouseButton button)
 
 bool UIWidget::onMouseRelease(const Point& mousePos, Fw::MouseButton button)
 {
-    if(m_destroyed)
-        return false;
-
     return callLuaField<bool>("onMouseRelease", mousePos, button);
 }
 
 bool UIWidget::onMouseMove(const Point& mousePos, const Point& mouseMoved)
 {
-    if(m_destroyed)
-        return false;
-
     return callLuaField<bool>("onMouseMove", mousePos, mouseMoved);
 }
 
 bool UIWidget::onMouseWheel(const Point& mousePos, Fw::MouseWheelDirection direction)
 {
-    if(m_destroyed)
-        return false;
-
     return callLuaField<bool>("onMouseWheel", mousePos, direction);
 }
 
 bool UIWidget::onClick(const Point& mousePos)
 {
-    if(m_destroyed)
-        return false;
-
     return callLuaField<bool>("onClick", mousePos);
 }
 
 bool UIWidget::onDoubleClick(const Point& mousePos)
 {
-    if(m_destroyed)
-        return false;
-
     return callLuaField<bool>("onDoubleClick", mousePos);
 }
 

src/framework/ui/uiwidget.h

@@ -170,7 +170,7 @@ protected:
     virtual void onFocusChange(bool focused, Fw::FocusReason reason);
     virtual void onChildFocusChange(const UIWidgetPtr& focusedChild, const UIWidgetPtr& unfocusedChild, Fw::FocusReason reason);
     virtual void onHoverChange(bool hovered);
-    virtual void onDragEnter(const Point& mousePos);
+    virtual bool onDragEnter(const Point& mousePos);
     virtual void onDragLeave(UIWidgetPtr droppedWidget, const Point& mousePos);
     virtual bool onDragMove(const Point& mousePos, const Point& mouseMoved);
     virtual bool onDrop(UIWidgetPtr draggedWidget, const Point& mousePos);