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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/ToolTipHelper.d @ 16:dbfb303e8fb0

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first complete successful compile (win-only)
author Frank Benoit <benoit@tionex.de>
date Wed, 18 Mar 2009 08:56:47 +0100
parents bc29606a740c
children
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module org.eclipse.draw2d.ToolTipHelper;
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14
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15 import java.lang.all;
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16 import java.util.Timer;
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17 import java.util.TimerTask;
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18
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19 import org.eclipse.swt.SWT;
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20 import org.eclipse.swt.events.MouseTrackAdapter;
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21 import org.eclipse.swt.graphics.Point;
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22 import org.eclipse.swt.widgets.Display;
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23 static import org.eclipse.swt.widgets.Control;
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24 static import org.eclipse.swt.graphics.Rectangle;
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25 static import org.eclipse.swt.events.MouseEvent;
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26
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27 import org.eclipse.draw2d.geometry.Dimension;
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28 import org.eclipse.draw2d.IFigure;
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29 import org.eclipse.draw2d.PopUpHelper;
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30 import org.eclipse.draw2d.ColorConstants;
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31
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32 /**
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33 * This class is used by SWTEventDispatcher as support to display Figure tooltips on a
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34 * mouse hover event. Tooltips are drawn directly below the cursor unless the display
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35 * does not allow, in which case the tooltip will be drawn directly above the cursor.
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36 * Tooltips will be displayed with a LineBorder. The background of the tooltips will be
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37 * the standard SWT tooltipBackground color unless the Figure's tooltip has set its own
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38 * background.
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39 */
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40 public class ToolTipHelper
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41 : PopUpHelper
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42 {
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43
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44 private Timer timer;
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45 private IFigure currentTipSource;
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46
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47 /**
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48 * Constructs a ToolTipHelper to be associated with Control <i>c</i>.
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49 *
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50 * @param c the control
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51 * @since 2.0
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52 */
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53 public this(org.eclipse.swt.widgets.Control.Control c) {
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54 super(c, SWT.TOOL | SWT.ON_TOP);
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55 getShell().setBackground(ColorConstants.tooltipBackground);
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56 getShell().setForeground(ColorConstants.tooltipForeground);
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57 }
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58
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59 /*
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60 * Calculates the location where the tooltip will be painted. Returns this as a Point.
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61 * Tooltip will be painted directly below the cursor if possible, otherwise it will be
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62 * painted directly above cursor.
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63 */
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64 private Point computeWindowLocation(IFigure tip, int eventX, int eventY) {
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65 org.eclipse.swt.graphics.Rectangle.Rectangle clientArea = control.getDisplay().getClientArea();
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66 Point preferredLocation = new Point(eventX, eventY + 26);
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67
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68 Dimension tipSize = getLightweightSystem()
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69 .getRootFigure()
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70 .getPreferredSize()
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71 .getExpanded(getShellTrimSize());
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72
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73 // Adjust location if tip is going to fall outside display
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74 if (preferredLocation.y + tipSize.height > clientArea.height)
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75 preferredLocation.y = eventY - tipSize.height;
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76
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77 if (preferredLocation.x + tipSize.width > clientArea.width)
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78 preferredLocation.x -= (preferredLocation.x + tipSize.width) - clientArea.width;
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79
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80 return preferredLocation;
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81 }
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82
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83 /**
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84 * Sets the LightWeightSystem's contents to the passed tooltip, and displays the tip. The
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85 * tip will be displayed only if the tip source is different than the previously viewed
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86 * tip source. (i.e. The cursor has moved off of the previous tooltip source figure.)
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87 * <p>
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88 * The tooltip will be painted directly below the cursor if possible, otherwise it will be
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89 * painted directly above cursor.
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90 *
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91 * @param hoverSource the figure over which the hover event was fired
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92 * @param tip the tooltip to be displayed
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93 * @param eventX the x coordinate of the hover event
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94 * @param eventY the y coordinate of the hover event
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95 * @since 2.0
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96 */
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97 public void displayToolTipNear(IFigure hoverSource, IFigure tip, int eventX, int eventY) {
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98 if (tip !is null && hoverSource !is currentTipSource) {
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99 getLightweightSystem().setContents(tip);
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100 Point displayPoint = computeWindowLocation(tip, eventX, eventY);
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101 Dimension shellSize = getLightweightSystem().getRootFigure()
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102 .getPreferredSize().getExpanded(getShellTrimSize());
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103 setShellBounds(displayPoint.x, displayPoint.y, shellSize.width, shellSize.height);
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104 show();
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105 currentTipSource = hoverSource;
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106 timer = new Timer(true);
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107 timer.schedule(new class() TimerTask {
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108 public void run() {
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109 Display.getDefault().syncExec(dgRunnable( {
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110 hide();
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111 timer.cancel();
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112 }));
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113 }
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114 }, 5000);
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115 }
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116 }
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117
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118 /**
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119 * Disposes of the tooltip's shell and kills the timer.
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120 *
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121 * @see PopUpHelper#dispose()
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122 */
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123 public void dispose() {
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124 if (isShowing()) {
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125 timer.cancel();
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126 hide();
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127 }
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128 getShell().dispose();
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129 }
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130
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131 /**
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132 * @see PopUpHelper#hookShellListeners()
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133 */
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134 protected void hookShellListeners() {
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135 // Close the tooltip window if the mouse enters the tooltip
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136 getShell().addMouseTrackListener(new class() MouseTrackAdapter {
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137 public void mouseEnter(org.eclipse.swt.events.MouseEvent.MouseEvent e) {
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138 hide();
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139 currentTipSource = null;
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140 timer.cancel();
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141 }
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142 });
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143 }
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144
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145 /**
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146 * Displays the hover source's tooltip if a tooltip of another source is currently being
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147 * displayed.
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148 *
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149 * @param figureUnderMouse the figure over which the cursor was when called
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150 * @param tip the tooltip to be displayed
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151 * @param eventX the x coordinate of the cursor
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152 * @param eventY the y coordinate of the cursor
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153 * @since 2.0
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154 */
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155 public void updateToolTip(IFigure figureUnderMouse, IFigure tip, int eventX, int eventY) {
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156 /* If the cursor is not on any Figures, it has been moved
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157 off of the control. Hide the tool tip. */
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158 if (figureUnderMouse is null) {
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159 if (isShowing()) {
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160 hide();
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161 timer.cancel();
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162 }
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163 }
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164 // Makes tooltip appear without a hover event if a tip is currently being displayed
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165 if (isShowing() && figureUnderMouse !is currentTipSource) {
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166 hide();
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167 timer.cancel();
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168 displayToolTipNear(figureUnderMouse, tip, eventX, eventY);
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169 } else if (!isShowing() && figureUnderMouse !is currentTipSource)
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170 currentTipSource = null;
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171 }
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172
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173 }