popup menu support

examples/example1/src/main.d

@@ -75,6 +75,14 @@ extern (C) int UIAppMain(string[] args) {
 		editItem.add(new Action(EditorActions.Undo, "Undo"d, "edit-undo", KeyCode.KEY_Z, KeyFlag.Control));
 		editItem.add(new Action(EditorActions.Redo, "Redo"d, "edit-redo", KeyCode.KEY_Y, KeyFlag.Control));
 		editItem.add(new Action(20, "Preferences..."d));
+
+		MenuItem editPopupItem = new MenuItem(null);
+		editPopupItem.add(new Action(EditorActions.Copy, "Copy"d, "edit-copy", KeyCode.KEY_C, KeyFlag.Control));
+		editPopupItem.add(new Action(EditorActions.Paste, "Paste"d, "edit-paste", KeyCode.KEY_V, KeyFlag.Control));
+		editPopupItem.add(new Action(EditorActions.Cut, "Cut"d, "edit-cut", KeyCode.KEY_X, KeyFlag.Control));
+		editPopupItem.add(new Action(EditorActions.Undo, "Undo"d, "edit-undo", KeyCode.KEY_Z, KeyFlag.Control));
+		editPopupItem.add(new Action(EditorActions.Redo, "Redo"d, "edit-redo", KeyCode.KEY_Y, KeyFlag.Control));
+
 		MenuItem windowItem = new MenuItem(new Action(3, "&Window"d));
         windowItem.add(new Action(30, "Preferences"d));
         MenuItem helpItem = new MenuItem(new Action(4, "Help"d));
@@ -119,7 +127,7 @@ extern (C) int UIAppMain(string[] args) {
 		hlayout.addChild((new ImageWidget()).drawableId("btn_check").padding(Rect(5,5,5,5)).alignment(Align.Center));
 	    hlayout.addChild((new TextWidget()).text("in horizontal layout"));
 		hlayout.addChild((new ImageWidget()).drawableId("exit").padding(Rect(5,5,5,5)).alignment(Align.Center));
-        hlayout.addChild((new EditLine("editline", "Some text to edit"d)).alignment(Align.Center).layoutWidth(FILL_PARENT));
+		hlayout.addChild((new EditLine("editline", "Some text to edit"d)).popupMenu(editPopupItem).alignment(Align.Center).layoutWidth(FILL_PARENT));
 		//hlayout.addChild((new Button()).text(">>")); //.textColor(0x40FF4000)
 	    hlayout.backgroundColor = 0x8080C0;
 	    layout.addChild(hlayout);
@@ -278,6 +286,7 @@ extern (C) int UIAppMain(string[] args) {
 		EditLine editLine = new EditLine("editline1", "Single line editor sample text");
         editors.addChild(createEditorSettingsControl(editLine));
 		editors.addChild(editLine);
+		editLine.popupMenu = editPopupItem;
 
         // EditBox sample
 		editors.addChild(new TextWidget(null, "EditBox: Multiline editor"d));
@@ -296,6 +305,7 @@ extern (C) int UIAppMain(string[] args) {
         editBox.minFontSize(12).maxFontSize(75); // allow font zoom with Ctrl + MouseWheel
         editors.addChild(createEditorSettingsControl(editBox));
 		editors.addChild(editBox);
+		editBox.popupMenu = editPopupItem;
 
 		editors.addChild(new TextWidget(null, "EditBox: additional view for the same content (split view testing)"d));
         EditBox editBox2 = new EditBox("editbox2", ""d);

src/dlangui/platforms/common/platform.d

@@ -85,10 +85,12 @@ class Window {
 
     protected PopupWidget[] _popups;
     /// show new popup
-    PopupWidget showPopup(Widget content, Widget anchor = null, uint alignment = PopupAlign.Center) {
+    PopupWidget showPopup(Widget content, Widget anchor = null, uint alignment = PopupAlign.Center, int x = 0, int y = 0) {
         PopupWidget res = new PopupWidget(content, this);
         res.anchor.widget = anchor !is null ? anchor : _mainWidget;
         res.anchor.alignment = alignment;
+		res.anchor.x = x;
+		res.anchor.y = y;
         _popups ~= res;
         if (_mainWidget !is null)
             _mainWidget.requestLayout();

src/dlangui/widgets/editors.d

@@ -25,6 +25,8 @@ import dlangui.widgets.controls;
 import dlangui.core.signals;
 import dlangui.core.collections;
 import dlangui.platforms.common.platform;
+import dlangui.widgets.menu;
+import dlangui.widgets.popup;
 
 import std.algorithm;
 
@@ -897,6 +899,36 @@ class EditWidgetBase : WidgetGroup, EditableContentListener {
 		]);
     }
 
+	protected MenuItem _popupMenu;
+	@property MenuItem popupMenu() { return _popupMenu; }
+	@property EditWidgetBase popupMenu(MenuItem popupMenu) {
+		_popupMenu = popupMenu;
+		return this;
+	}
+	/// returns true if widget can show popup (e.g. by mouse right click at point x,y)
+	override bool canShowPopupMenu(int x, int y) {
+		if (_popupMenu is null)
+			return false;
+		if (_popupMenu.onBeforeOpeningSubmenu.assigned)
+			if (!_popupMenu.onBeforeOpeningSubmenu(_popupMenu))
+				return false;
+		return true;
+	}
+	/// shows popup at (x,y)
+	override void showPopupMenu(int x, int y) {
+		/// if preparation signal handler assigned, call it; don't show popup if false is returned from handler
+		if (_popupMenu.onBeforeOpeningSubmenu.assigned)
+			if (!_popupMenu.onBeforeOpeningSubmenu(_popupMenu))
+				return;
+		PopupMenu popupMenu = new PopupMenu(_popupMenu);
+		PopupWidget popup = window.showPopup(popupMenu, this, PopupAlign.Point | PopupAlign.Right, x, y);
+		popup.flags = PopupFlags.CloseOnClickOutside;
+	}
+
+	void onPopupMenuItem(MenuItem item) {
+		// TODO
+	}
+
     /// when true, Tab / Shift+Tab presses are processed internally in widget (e.g. insert tab character) instead of focus change navigation.
     @property bool wantTabs() {
         return _wantTabs;
@@ -1630,7 +1662,7 @@ class EditWidgetBase : WidgetGroup, EditableContentListener {
                 return handleAction(new Action(EditorActions.ScrollLineUp));
             }
         }
-	    return false;
+	    return super.onMouseEvent(event);
     }
 
 

src/dlangui/widgets/menu.d

@@ -97,6 +97,12 @@ class MenuItem {
     @property const(Action) action() const { return _action; }
     /// sets item action
     @property MenuItem action(Action a) { _action = a; return this; }
+
+	/// handle menu item click
+	Signal!(void, MenuItem) onMenuItem;
+	/// prepare for opening of submenu, return true if opening is allowed
+	Signal!(bool, MenuItem) onBeforeOpeningSubmenu;
+
     this() {
         _enabled = true;
     }

src/dlangui/widgets/popup.d

@@ -32,10 +32,14 @@ enum PopupAlign : uint {
     Below = 2,
     /// place popup below anchor widget close to right bound (when no space enough, align near left bound)
     Right = 4,
+	/// align to specified point
+	Point = 8,
 }
 
 struct PopupAnchor {
     Widget widget;
+	int x;
+	int y;
     uint  alignment = PopupAlign.Center;
 }
 
@@ -105,6 +109,10 @@ class PopupWidget : LinearLayout {
         Rect r;
         Point anchorPt;
 
+		if (anchor.alignment & PopupAlign.Point) {
+			r.left = anchor.x;
+			r.top = anchor.y;
+		} else {
 			if (anchor.alignment & PopupAlign.Center) {
 	            // center around center of anchor widget
 	            r.left = anchorrc.middlex - w / 2;
@@ -116,6 +124,7 @@ class PopupWidget : LinearLayout {
 	            r.left = anchorrc.right;
 	            r.top = anchorrc.top;
 	        }
+		}
         r.right = r.left + w;
         r.bottom = r.top + h;
         r.moveToFit(rc);

src/dlangui/widgets/widget.d

@@ -866,6 +866,12 @@ class Widget {
 	            return true;
 	        }
 		}
+		if (event.action == MouseAction.ButtonDown && event.button == MouseButton.Right) {
+			if (canShowPopupMenu(event.x, event.y)) {
+				showPopupMenu(event.x, event.y);
+				return true;
+			}
+		}
         if (canFocus && event.action == MouseAction.ButtonDown && event.button == MouseButton.Left) {
             setFocus();
             return true;
@@ -1034,6 +1040,17 @@ class Widget {
         }
     }
 
+	// ===========================================================
+	// popup menu support
+	/// 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;
+	}
+	/// shows popup menu at (x,y)
+	void showPopupMenu(int x, int y) {
+		// override to show popup
+	}
+
     // ===========================================================
     // Widget hierarhy methods