some window moving

src/framework/ui/uimanager.cpp

@@ -79,6 +79,22 @@ void UIManager::inputEvent(const InputEvent& event)
             break;
         case Fw::MouseReleaseInputEvent:
             m_mouseReceiver->propagateOnMouseRelease(event.mousePos, event.mouseButton);
+            if(m_draggingWidget && event.mouseButton == Fw::MouseLeftButton) {
+                auto clickedChildren = m_rootWidget->recursiveGetChildrenByPos(event.mousePos);
+                UIWidgetPtr droppedWidget;
+                for(const UIWidgetPtr& child : clickedChildren) {
+                    if(child != m_draggingWidget) {
+                        droppedWidget = child;
+                        break;
+                    }
+                }
+                if(droppedWidget)
+                    droppedWidget->onDrop(m_draggingWidget, event.mousePos);
+
+                m_draggingWidget->onDragLeave(droppedWidget, event.mousePos);
+                m_draggingWidget->setDragging(false);
+                m_draggingWidget = nullptr;
+            }
             break;
         case Fw::MouseMoveInputEvent:
             m_mouseReceiver->updateState(Fw::HoverState);

src/framework/ui/uiwidget.cpp

@@ -743,12 +743,6 @@ void UIWidget::setPhantom(bool phantom)
 
 void UIWidget::setDragging(bool dragging)
 {
-    if(dragging) {
-        g_ui.setDraggingWidget(asUIWidget());
-    } else {
-        if(g_ui.getDraggingWidget() == asUIWidget())
-            g_ui.setDraggingWidget(nullptr);
-    }
     m_dragging = dragging;
 }
 
@@ -898,6 +892,22 @@ UIWidgetPtr UIWidget::recursiveGetChildByPos(const Point& childPos)
     return nullptr;
 }
 
+UIWidgetList UIWidget::recursiveGetChildrenByPos(const Point& childPos)
+{
+    UIWidgetList children;
+    for(auto it = m_children.rbegin(); it != m_children.rend(); ++it) {
+        const UIWidgetPtr& child = (*it);
+        if(child->isExplicitlyVisible() && child->containsPoint(childPos)) {
+            UIWidgetList subChildren = child->recursiveGetChildrenByPos(childPos);
+            if(!subChildren.empty())
+                children.insert(children.end(), subChildren.begin(), subChildren.end());
+            else if(!child->isPhantom())
+                children.push_back(child);
+        }
+    }
+    return children;
+}
+
 UIWidgetPtr UIWidget::backwardsGetWidgetById(const std::string& id)
 {
     UIWidgetPtr widget = getChildById(id);
@@ -1141,6 +1151,11 @@ void UIWidget::onDragLeave(UIWidgetPtr droppedWidget, const Point& mousePos)
     callLuaField("onDragLeave", droppedWidget, mousePos);
 }
 
+bool UIWidget::onDragMove(const Point& mousePos, const Point& mouseMoved)
+{
+    return callLuaField("onDragMove", mousePos, mouseMoved);
+}
+
 void UIWidget::onDrop(UIWidgetPtr draggedWidget, const Point& mousePos)
 {
     callLuaField("onDrop", draggedWidget, mousePos);
@@ -1184,13 +1199,6 @@ bool UIWidget::onMouseRelease(const Point& mousePos, Fw::MouseButton button)
     if(isPressed() && getRect().contains(mousePos))
         onClick(mousePos);
 
-    UIWidgetPtr draggedWidget = g_ui.getDraggingWidget();
-    if(draggedWidget && button == Fw::MouseLeftButton && (containsPoint(mousePos) || asUIWidget() == g_ui.getRootWidget())) {
-        onDrop(draggedWidget, mousePos);
-        draggedWidget->onDragLeave(asUIWidget(), mousePos);
-        draggedWidget->setDragging(false);
-    }
-
     return callLuaField<bool>("onMouseRelease", mousePos, button);
 }
 
@@ -1202,6 +1210,11 @@ bool UIWidget::onMouseMove(const Point& mousePos, const Point& mouseMoved)
         onDragEnter(mousePos - mouseMoved);
     }
 
+    if(m_dragging) {
+        if(onDragMove(mousePos, mouseMoved))
+            return true;
+    }
+
     return callLuaField<bool>("onMouseMove", mousePos, mouseMoved);
 }
 
@@ -1354,7 +1367,7 @@ bool UIWidget::propagateOnMouseRelease(const Point& mousePos, Fw::MouseButton bu
     UIWidgetList children;
     for(const UIWidgetPtr& child : m_children) {
         // events on hidden or disabled widgets are discarded
-        if(!child->isExplicitlyEnabled() || !child->isExplicitlyVisible())
+        if((!child->isExplicitlyEnabled() || !child->isExplicitlyVisible()) && (!child->isPressed() && button == Fw::MouseLeftButton))
             continue;
 
         // mouse release events go to all children

src/framework/ui/uiwidget.h

@@ -140,6 +140,7 @@ public:
     UIWidgetPtr getChildByIndex(int index);
     UIWidgetPtr recursiveGetChildById(const std::string& id);
     UIWidgetPtr recursiveGetChildByPos(const Point& childPos);
+    UIWidgetList recursiveGetChildrenByPos(const Point& childPos);
     UIWidgetPtr backwardsGetWidgetById(const std::string& id);
 
     UIWidgetPtr asUIWidget() { return std::static_pointer_cast<UIWidget>(shared_from_this()); }
@@ -175,6 +176,7 @@ protected:
     virtual void onHoverChange(bool hovered);
     virtual void onDragEnter(const Point& mousePos);
     virtual void onDragLeave(UIWidgetPtr droppedWidget, const Point& mousePos);
+    virtual bool onDragMove(const Point& mousePos, const Point& mouseMoved);
     virtual void onDrop(UIWidgetPtr draggedWidget, const Point& mousePos);
     virtual bool onKeyText(const std::string& keyText);
     virtual bool onKeyDown(uchar keyCode, int keyboardModifiers);