Merge pull request #559 from and3md/menu_and_popup_menu

Possibility to add popup menu to any widget, menu behavior fixes.

src/dlangui/platforms/common/platform.d

@@ -1505,8 +1505,11 @@ class Window : CustomEventTarget {
                 if (p is modal)
                     break;
                 if (!insideOneOfPopups) {
-                    if (p.onMouseEventOutside(event)) // stop loop when true is returned, but allow other main widget to handle event
-                        break;
+                    if (event.action == MouseAction.ButtonDown)
+                        return true; // mouse button down should do nothing when click outside when popup visible
+                    if (p.onMouseEventOutside(event)) {
+                        return true; // mouse button up should do nothing when click outside when popup visible
+                    }
                 } else {
                     if (dispatchMouseEvent(p, event, cursorIsSet))
                         return true;

src/dlangui/widgets/appframe.d

@@ -256,7 +256,7 @@ class AppFrame : VerticalLayout, MenuItemClickHandler, MenuItemActionHandler {
     }
 
     /// override to handle main menu actions
-    bool onMenuItemAction(const Action action) {
+    override bool onMenuItemAction(const Action action) {
         // default handling: dispatch action using window (first offered to focused control, then to main widget)
         return window.dispatchAction(action);
     }

src/dlangui/widgets/editors.d

@@ -849,13 +849,6 @@ class EditWidgetBase : ScrollWidgetBase, EditableContentListener, MenuItemAction
         acceleratorMap.add([ACTION_EDITOR_FIND_NEXT, ACTION_EDITOR_FIND_PREV]);
     }
 
-    protected MenuItem _popupMenu;
-    @property MenuItem popupMenu() { return _popupMenu; }
-    @property EditWidgetBase popupMenu(MenuItem popupMenu) {
-        _popupMenu = popupMenu;
-        return this;
-    }
-
     ///
     override bool onMenuItemAction(const Action action) {
         return dispatchAction(action);

src/dlangui/widgets/grid.d

@@ -1005,7 +1005,7 @@ class GridWidgetBase : ScrollWidgetBase, GridModelAdapter, MenuItemActionHandler
     }
 
     /// handle popup menu action
-    protected bool onMenuItemAction(const Action action) {
+    protected override bool onMenuItemAction(const Action action) {
         if (menuItemAction.assigned)
             return menuItemAction(action);
         return false;

src/dlangui/widgets/menu.d

@@ -937,7 +937,7 @@ class MainMenu : MenuWidgetBase {
         super(null, null, Orientation.Horizontal);
         id = "MAIN_MENU";
         styleId = STYLE_MAIN_MENU;
-        _clickOnButtonDown = true;
+        _clickOnButtonDown = false;
         selectOnHover = false;
     }
 
@@ -945,7 +945,7 @@ class MainMenu : MenuWidgetBase {
         super(null, item, Orientation.Horizontal);
         id = "MAIN_MENU";
         styleId = STYLE_MAIN_MENU;
-        _clickOnButtonDown = true;
+        _clickOnButtonDown = false;
         selectOnHover = false;
     }
 

src/dlangui/widgets/popup.d

@@ -174,10 +174,10 @@ class PopupWidget : LinearLayout {
         if (visibility != Visibility.Visible)
             return false;
         if (_flags & PopupFlags.CloseOnClickOutside) {
-            if (event.action == MouseAction.ButtonDown) {
+            if (event.action == MouseAction.ButtonUp) {
                 // clicked outside - close popup
                 close();
-                return false;
+                return true;
             }
         }
         if (_flags & PopupFlags.CloseOnMouseMoveOutside) {

src/dlangui/widgets/widget.d

@@ -41,6 +41,7 @@ public {
     import dlangui.core.i18n;
     import dlangui.core.collections;
     import dlangui.widgets.styles;
+    import dlangui.widgets.menu;
 
     import dlangui.graphics.drawbuf;
     import dlangui.graphics.resources;
@@ -153,7 +154,7 @@ enum CursorType {
  *
  */
 @dmlwidget
-class Widget {
+class Widget : MenuItemActionHandler {
 protected:
     /// widget id
     string _id;
@@ -1506,13 +1507,38 @@ public:
 
     // ===========================================================
     // popup menu support
+    override bool onMenuItemAction(const Action action) {
+        return dispatchAction(action);
+    }
+
+    protected MenuItem _popupMenu;
+    @property MenuItem popupMenu() { return _popupMenu; }
+    @property Widget popupMenu(MenuItem popupMenu) {
+        _popupMenu = popupMenu;
+        return this;
+    }
+    
     /// returns true if widget can show popup menu (e.g. by mouse right click at point x,y)
     bool canShowPopupMenu(int x, int y) {
-        return false;
+        if (_popupMenu is null)
+            return false;
+        if (_popupMenu.openingSubmenu.assigned)
+            if (!_popupMenu.openingSubmenu(_popupMenu))
+                return false;
+        return true;
     }
     /// shows popup menu at (x,y)
     void showPopupMenu(int x, int y) {
-        // override to show popup
+        /// if preparation signal handler assigned, call it; don't show popup if false is returned from handler
+        if (_popupMenu.openingSubmenu.assigned)
+            if (!_popupMenu.openingSubmenu(_popupMenu))
+                return;
+        _popupMenu.updateActionState(this);
+        import dlangui.widgets.popup;
+        PopupMenu popupMenu = new PopupMenu(_popupMenu);
+        popupMenu.menuItemAction = this;
+        PopupWidget popup = window.showPopup(popupMenu, this, PopupAlign.Point | PopupAlign.Right, x, y);
+        popup.flags = PopupFlags.CloseOnClickOutside;
     }
     /// override to change popup menu items state
     bool isActionEnabled(const Action action) {