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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 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 dwtx.ui.internal.forms.widgets.ObjectSegment;
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14
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15 import dwtx.ui.internal.forms.widgets.ParagraphSegment;
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16 import dwtx.ui.internal.forms.widgets.Locator;
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17 import dwtx.ui.internal.forms.widgets.SelectionData;
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18
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19 import dwt.DWT;
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20 import dwt.graphics.GC;
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21 import dwt.graphics.Point;
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22 import dwt.graphics.Rectangle;
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23
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24 import dwt.dwthelper.utils;
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25
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26 public abstract class ObjectSegment : ParagraphSegment {
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27 public static const int TOP = 1;
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28
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29 public static const int MIDDLE = 2;
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30
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31 public static const int BOTTOM = 3;
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32
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33 private int alignment = BOTTOM;
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34 private bool nowrap=false;
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35 private Rectangle bounds;
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36 private String objectId;
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37
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38 public int getVerticalAlignment() {
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39 return alignment;
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40 }
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41
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42 void setVerticalAlignment(int alignment) {
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43 this.alignment = alignment;
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44 }
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45
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46 public String getObjectId() {
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47 return objectId;
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48 }
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49
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50 void setObjectId(String objectId) {
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51 this.objectId = objectId;
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52 }
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53
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54 protected abstract Point getObjectSize(Hashtable resourceTable, int wHint);
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55
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56 public bool advanceLocator(GC gc, int wHint, Locator loc,
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57 Hashtable objectTable, bool computeHeightOnly) {
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58 Point objectSize = getObjectSize(objectTable, wHint);
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59 int iwidth = 0;
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60 int iheight = 0;
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61 bool newLine = false;
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62
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63 if (objectSize !is null) {
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64 iwidth = objectSize.x + (isSelectable()?2:0);
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65 iheight = objectSize.y + (isSelectable()?2:0);
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66 }
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67 if (wHint !is DWT.DEFAULT && !nowrap && loc.x + iwidth > wHint) {
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68 // new line
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69 if (computeHeightOnly)
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70 loc.collectHeights();
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71 loc.x = loc.indent;
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72 loc.x += iwidth;
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73 loc.y += loc.rowHeight;
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74 loc.width = loc.indent + iwidth;
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75 loc.rowHeight = iheight;
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76 loc.leading = 0;
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77 newLine = true;
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78 } else {
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79 loc.x += iwidth;
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80 loc.width += iwidth;
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81 loc.rowHeight = Math.max(loc.rowHeight, iheight);
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82 }
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83 return newLine;
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84 }
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85
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86 public bool contains(int x, int y) {
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87 if (boundsisnull)
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88 return false;
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89 return bounds.contains(x, y);
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90 }
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91 public bool intersects(Rectangle rect) {
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92 if (boundsisnull)
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93 return false;
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94 return bounds.intersects(rect);
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95 }
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96
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97 public Rectangle getBounds() {
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98 return bounds;
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99 }
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100
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101 public bool isSelectable() {
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102 return false;
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103 }
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104 /**
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105 * @return Returns the nowrap.
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106 */
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107 public bool isNowrap() {
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108 return nowrap;
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109 }
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110 /**
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111 * @param nowrap The nowrap to set.
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112 */
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113 public void setNowrap(bool nowrap) {
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114 this.nowrap = nowrap;
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115 }
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116 public void paint(GC gc, bool hover, Hashtable resourceTable, bool selected, SelectionData selData, Rectangle repaintRegion) {
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117 }
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118
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119 /* (non-Javadoc)
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120 * @see dwtx.ui.internal.forms.widgets.ParagraphSegment#layout(dwt.graphics.GC, int, dwtx.ui.internal.forms.widgets.Locator, java.util.Hashtable, bool, dwtx.ui.internal.forms.widgets.SelectionData)
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121 */
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122 public void layout(GC gc, int width, Locator loc, Hashtable resourceTable,
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123 bool selected) {
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124 Point size = getObjectSize(resourceTable, width);
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125
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126 int objWidth = 0;
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127 int objHeight = 0;
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128 if (size !is null) {
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129 objWidth = size.x + (isSelectable()?2:0);
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130 objHeight = size.y + (isSelectable()?2:0);
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131 } else
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132 return;
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133 loc.width = objWidth;
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134
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135 if (!nowrap && loc.x + objWidth > width) {
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136 // new row
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137 loc.newLine();
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138 loc.rowCounter++;
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139 }
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140 int ix = loc.x;
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141 int iy = loc.y;
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142
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143 if (alignmentisMIDDLE)
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144 iy = loc.getMiddle(objHeight, false);
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145 else if (alignmentisBOTTOM)
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146 iy = loc.getBaseline(objHeight, false);
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147 loc.x += objWidth;
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148 loc.rowHeight = Math.max(loc.rowHeight, objHeight);
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149 bounds = new Rectangle(ix, iy, objWidth, objHeight);
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150 }
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151 /* (non-Javadoc)
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152 * @see dwtx.ui.internal.forms.widgets.ParagraphSegment#computeSelection(dwt.graphics.GC, java.util.Hashtable, bool, dwtx.ui.internal.forms.widgets.SelectionData)
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153 */
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154 public void computeSelection(GC gc, Hashtable resourceTable, SelectionData selData) {
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155 // TODO we should add this to the selection
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156 // if we want to support rich text
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157 }
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158 }
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