bundles/org.simantics.g2d/src/org/simantics/g2d/tooltip/AWTTooltipProvider.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.g2d.tooltip;
  13
  14 import java.awt.Frame;
  15 import java.awt.GraphicsDevice;
  16 import java.awt.GraphicsEnvironment;
  17 import java.awt.Rectangle;
  18
  19 import javax.swing.SwingUtilities;
  20
  21 import org.simantics.g2d.element.IElement;
  22
  23 /**
  24  * AWT based tooltip.
  25  *
  26  * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
  27  *
  28  */
  29 public abstract class AWTTooltipProvider implements TooltipProvider {
  30
  31         private Frame frame;
  32
  33         /**
  34          * Construct popup UI.
  35          * @param frame
  36          * @param element
  37          */
  38         public abstract void constructPopup(Frame frame,IElement element);
  39
  40         @Override
  41         public void showTooltip(final IElement element, final int x, final int y) {
  42                 SwingUtilities.invokeLater(new Runnable() {
  43                         @Override
  44                         public void run() {
  45                                 if (frame != null) {
  46                                         frame.setVisible(false);
  47                                         frame.dispose();
  48                                         frame = null;
  49                                 }
  50
  51                                 frame = new Frame();
  52                                 frame.setFocusableWindowState(false);
  53                                 frame.setUndecorated(true);
  54
  55                                 constructPopup(frame, element);
  56
  57                                 frame.pack();
  58
  59                                 setTooltipPosition(x,y);
  60
  61                                 frame.setVisible(true);
  62                         }
  63                 });
  64         }
  65
  66         /**
  67          *
  68          * @param x
  69          * @param y
  70          */
  71         private void setTooltipPosition(int x, int y) {
  72
  73                 GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
  74                 for (GraphicsDevice gd : ge.getScreenDevices()) {
  75                         Rectangle r = gd.getDefaultConfiguration().getBounds();
  76                         if (r.contains(x, y)) {
  77                                 Rectangle ttr = new Rectangle(x, y, frame.getWidth(), frame.getHeight());
  78                                 //ttr.y -= frame.getHeight();
  79                                 ttr.y += 24;
  80                                 if (!r.contains(ttr)) {
  81                                         ttr.y = Math.max(r.y, ttr.y);
  82                                         ttr.y = Math.min(r.y + r.height, ttr.y + ttr.height) - ttr.height;
  83                                         ttr.x = Math.max(r.x, ttr.x);
  84                                         ttr.x = Math.min(r.x + r.width, ttr.x + ttr.width) - ttr.width;
  85                                 }
  86                                 frame.setLocation(ttr.x,ttr.y);
  87                                 return;
  88                         }
  89                 }
  90         }
  91
  92
  93         @Override
  94         public void hideTooltip(IElement element) {
  95                 SwingUtilities.invokeLater(new Runnable() {
  96                         @Override
  97                         public void run() {
  98                                 frame.setVisible(false);
  99                                 frame.dispose();
 100                                 frame = null;
 101
 102                         }
 103                 });
 104         }
 105 }