bundles/org.simantics.diagram/src/org/simantics/diagram/ui/SWTPopupMenuParticipantAwt.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.diagram.ui;
  13
  14 import java.awt.geom.Point2D;
  15
  16 import org.eclipse.swt.SWT;
  17 import org.eclipse.swt.events.MenuEvent;
  18 import org.eclipse.swt.graphics.Point;
  19 import org.eclipse.swt.widgets.Control;
  20 import org.eclipse.swt.widgets.Display;
  21 import org.eclipse.swt.widgets.Menu;
  22 import org.eclipse.swt.widgets.Shell;
  23 import org.eclipse.ui.IWorkbenchPartSite;
  24 import org.simantics.g2d.diagram.DiagramHints;
  25
  26 /**
  27  * This is a SWTPopupMenu implementation with workaround for SWT popup menus that do not work when overlaid top of AWT widgets in Linux/GTK
  28  *
  29  * @see https://bugs.eclipse.org/bugs/show_bug.cgi?id=392101
  30  *
  31  *
  32  * @author Marko Luukkainen
  33  *
  34  */
  35 public class SWTPopupMenuParticipantAwt extends SWTPopupMenuParticipant {
  36
  37         Shell shell;
  38         Menu menu;
  39
  40     public SWTPopupMenuParticipantAwt(IWorkbenchPartSite site, Control control, Display display, String menuId) {
  41                 super(site, control, display, menuId);
  42         }
  43
  44     @Override
  45     protected void runDispose() {
  46         if (shell != null) {
  47                 shell.dispose();
  48                 shell = null;
  49         }
  50
  51         super.runDispose();
  52     }
  53
  54
  55     @Override
  56     protected void createControl() {
  57         if(shell == null) {
  58             shell = new Shell(control.getShell(),SWT.NO_TRIM|SWT.NO_FOCUS|SWT.ON_TOP);
  59             shell.setSize(4, 4);
  60             shell.setVisible(false);
  61         }
  62         menuManager = createPopupMenu();
  63         if (menuManager != null) {
  64                 menu = menuManager.createContextMenu(shell);
  65             menu.addMenuListener(menuListener);
  66             shell.setMenu(menu);
  67             if (site != null) {
  68                 site.registerContextMenu(menuManager.getId(), menuManager, wbsp);
  69             }
  70         }
  71     }
  72
  73     @Override
  74     protected void menuHidden(MenuEvent e) {
  75         if (shell != null)
  76                 shell.setVisible(false);
  77         super.menuHidden(e);
  78     }
  79
  80         /**
  81      * @param newValue
  82      * @thread canvas-thread (AWT)
  83      */
  84     protected void showPopup(Point2D newValue) {
  85         final Point2D cp = (Point2D) newValue;
  86         setHint(DiagramHints.POPUP_MENU_CONTROL_POSITION, cp);
  87         setHint(DiagramHints.POPUP_MENU_CANVAS_POSITION, trUtil.controlToCanvas(cp, null));
  88         display.asyncExec(new Runnable() {
  89             @Override
  90             public void run() {
  91
  92                 if (control == null || control.isDisposed())
  93                     return;
  94                 final Point p = control.toDisplay((int) cp.getX(), (int) cp.getY());
  95
  96                     shell.getDisplay().asyncExec(new Runnable() {
  97                       public void run() {
  98                                 shell.setLocation(p.x-1, p.y-1);
  99                                 shell.setActive();
 100                                 shell.setVisible(true);
 101                       }});
 102                     shell.getDisplay().asyncExec(new Runnable() {
 103                       public void run() {
 104                         menuManager.getMenu().setLocation(p);
 105                     menuManager.getMenu().setVisible(true);
 106                       }});
 107
 108             }
 109         });
 110     }
 111
 112 }