popup and menu improvements

src/dlangui/platforms/common/platform.d

@@ -78,6 +78,7 @@ class Window {
                 for (int j = i; j < _popups.length - 1; j++)
                     _popups[j] = _popups[j + 1];
                 _popups.length--;
+                p.onClose();
                 destroy(p);
                 // force redraw
                 _mainWidget.invalidate();
@@ -340,14 +341,25 @@ class Window {
             processed = checkRemoveTracking(event);
         }
         if (!res) {
+            bool insideOneOfPopups = false;
             for (int i = cast(int)_popups.length - 1; i >= 0; i--) {
 				auto p = _popups[i];
-                if (dispatchMouseEvent(p, event))
-                    return true;
+                if (p.isPointInside(event.x, event.y))
+                    insideOneOfPopups = true;
+            }
+            for (int i = cast(int)_popups.length - 1; i >= 0; i--) {
+				auto p = _popups[i];
+                if (!insideOneOfPopups) {
+                    if (p.onMouseEventOutside(event)) // stop loop when true is returned, but allow other main widget to handle event
+                        break;
+                } else {
+                    if (dispatchMouseEvent(p, event))
+                        return true;
+                }
             }
             res = dispatchMouseEvent(_mainWidget, event);
         }
-        return res || processed;
+        return res || processed || _mainWidget.needDraw;
     }
 
     /// checks content widgets for necessary redraw and/or layout

src/dlangui/widgets/menu.d

@@ -102,11 +102,20 @@ class MenuWidgetBase : ListWidget {
         ownAdapter = adapter;
     }
 
+    protected void onPopupClosed(PopupWidget p) {
+        _openedPopup = null;
+        _openedMenu = null;
+        selectItem(-1);
+    }
+
 	protected void openSubmenu(MenuItemWidget itemWidget) {
-		if (_openedPopup !is null)
+		if (_openedPopup !is null) {
 			_openedPopup.close();
+        }
 		PopupMenu popupMenu = new PopupMenu(itemWidget.item, this);
 		PopupWidget popup = window.showPopup(popupMenu, itemWidget, PopupAlign.Below);
+        popup.onPopupCloseListener = &onPopupClosed;
+        popup.flags = PopupFlags.CloseOnClickOutside;
 		_openedPopup = popup;
 		_openedMenu = popupMenu;
 	}

src/dlangui/widgets/popup.d

@@ -17,10 +17,29 @@ struct PopupAnchor {
     uint  alignment = PopupAlign.Center;
 }
 
+/// popup behavior flags - for PopupWidget.flags property
+enum PopupFlags : uint {
+    /// close popup when mouse button clicked outside of its bounds
+    CloseOnClickOutside = 1,
+}
+
 /// popup widget container
 class PopupWidget : LinearLayout {
     protected PopupAnchor _anchor;
     protected bool _modal;
+
+    protected uint _flags;
+    protected void delegate(PopupWidget popup) _onPopupCloseListener;
+    /// popup close listener (called right before closing)
+    @property void delegate(PopupWidget popup) onPopupCloseListener() { return _onPopupCloseListener; }
+    /// set popup close listener (to call right before closing)
+    @property PopupWidget onPopupCloseListener(void delegate(PopupWidget popup) listener) { _onPopupCloseListener = listener; return this; }
+
+    /// returns popup behavior flags (combination of PopupFlags)
+    @property uint flags() { return _flags; }
+    /// set popup behavior flags (combination of PopupFlags)
+    @property PopupWidget flags(uint flags) { _flags = flags; return this; }
+
     /// access to popup anchor
     @property ref PopupAnchor anchor() { return _anchor; }
     /// returns true if popup is modal
@@ -37,6 +56,12 @@ class PopupWidget : LinearLayout {
 		window.removePopup(this);
 	}
 
+    /// just call on close listener
+    void onClose() {
+        if (_onPopupCloseListener !is null)
+            _onPopupCloseListener(this);
+    }
+
     /// Set widget rectangle to specified value and layout widget contents. (Step 2 of two phase layout).
     override void layout(Rect rc) {
         if (visibility == Visibility.Gone) {
@@ -77,4 +102,18 @@ class PopupWidget : LinearLayout {
         //styleId = "POPUP_MENU";
         addChild(content);
     }
+
+    /// called for mouse activity outside shown popup bounds
+    bool onMouseEventOutside(MouseEvent event) {
+        if (visibility != Visibility.Visible)
+            return false;
+        if (_flags & PopupFlags.CloseOnClickOutside) {
+            if (event.action == MouseAction.ButtonDown) {
+                // clicked outside - close popup
+                close();
+                return false;
+            }
+        }
+        return false;
+    }
 }