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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.jface.preference.ColorFieldEditor;
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14
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15 import dwtx.jface.preference.FieldEditor;
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16 import dwtx.jface.preference.ColorSelector;
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17 import dwtx.jface.preference.PreferenceConverter;
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18
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19 import dwt.graphics.Font;
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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.layout.GridData;
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23 import dwt.widgets.Button;
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24 import dwt.widgets.Composite;
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25 import dwt.widgets.Control;
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26 import dwtx.jface.resource.JFaceResources;
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27 import dwtx.jface.util.IPropertyChangeListener;
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28 import dwtx.jface.util.PropertyChangeEvent;
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29
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30 import dwt.dwthelper.utils;
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31
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32 /**
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33 * A field editor for a color type preference.
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34 */
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35 public class ColorFieldEditor : FieldEditor {
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36
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37 /**
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38 * The color selector, or <code>null</code> if none.
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39 */
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40 private ColorSelector colorSelector;
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41
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42 /**
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43 * Creates a new color field editor
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44 */
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45 protected this() {
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46 //No default behavior
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47 }
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48
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49 /**
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50 * Creates a color field editor.
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51 *
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52 * @param name
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53 * the name of the preference this field editor works on
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54 * @param labelText
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55 * the label text of the field editor
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56 * @param parent
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57 * the parent of the field editor's control
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58 */
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59 public this(String name, String labelText, Composite parent) {
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60 super(name, labelText, parent);
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61 }
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62
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63 /*
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64 * (non-Javadoc) Method declared on FieldEditor.
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65 */
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66 protected void adjustForNumColumns(int numColumns) {
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67 (cast(GridData) colorSelector.getButton().getLayoutData()).horizontalSpan = numColumns - 1;
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68 }
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69
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70 /**
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71 * Computes the size of the color image displayed on the button.
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72 * <p>
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73 * This is an internal method and should not be called by clients.
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74 * </p>
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75 *
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76 * @param window
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77 * the window to create a GC on for calculation.
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78 * @return Point The image size
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79 *
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80 */
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81 protected Point computeImageSize(Control window) {
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82 // Make the image height as high as a corresponding character. This
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83 // makes sure that the button has the same size as a "normal" text
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84 // button.
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85 GC gc = new GC(window);
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86 Font f = JFaceResources.getFontRegistry().get(
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87 JFaceResources.DEFAULT_FONT);
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88 gc.setFont(f);
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89 int height = gc.getFontMetrics().getHeight();
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90 gc.dispose();
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91 Point p = new Point(height * 3 - 6, height);
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92 return p;
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93 }
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94
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95
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96 /* (non-Javadoc)
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97 * @see dwtx.jface.preference.FieldEditor#doFillIntoGrid(dwt.widgets.Composite, int)
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98 */
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99 protected void doFillIntoGrid(Composite parent, int numColumns) {
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100 Control control = getLabelControl(parent);
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101 GridData gd = new GridData();
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102 gd.horizontalSpan = numColumns - 1;
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103 control.setLayoutData(gd);
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104
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105 Button colorButton = getChangeControl(parent);
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106 colorButton.setLayoutData(new GridData());
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107
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108 }
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109
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110
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111 /* (non-Javadoc)
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112 * @see dwtx.jface.preference.FieldEditor#doLoad()
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113 */
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114 protected void doLoad() {
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115 if (colorSelector is null) {
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116 return;
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117 }
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118 colorSelector.setColorValue(PreferenceConverter.getColor(
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119 getPreferenceStore(), getPreferenceName()));
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120 }
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121
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122 /*
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123 * (non-Javadoc) Method declared on FieldEditor.
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124 */
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125 protected void doLoadDefault() {
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126 if (colorSelector is null) {
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127 return;
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128 }
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129 colorSelector.setColorValue(PreferenceConverter.getDefaultColor(
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130 getPreferenceStore(), getPreferenceName()));
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131 }
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132
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133 /*
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134 * (non-Javadoc) Method declared on FieldEditor.
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135 */
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136 protected void doStore() {
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137 PreferenceConverter.setValue(getPreferenceStore(), getPreferenceName(),
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138 colorSelector.getColorValue());
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139 }
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140
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141 /**
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142 * Get the color selector used by the receiver.
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143 *
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144 * @return ColorSelector/
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145 */
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146 public ColorSelector getColorSelector() {
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147 return colorSelector;
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148 }
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149
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150 /**
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151 * Returns the change button for this field editor.
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152 *
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153 * @param parent
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154 * The control to create the button in if required.
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155 * @return the change button
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156 */
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157 protected Button getChangeControl(Composite parent) {
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158 if (colorSelector is null) {
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159 colorSelector = new ColorSelector(parent);
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160 colorSelector.addListener(new class IPropertyChangeListener {
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161 // forward the property change of the color selector
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162 public void propertyChange(PropertyChangeEvent event) {
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163 this.outer.fireValueChanged(event.getProperty(),
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164 event.getOldValue(), event.getNewValue());
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165 setPresentsDefaultValue(false);
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166 }
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167 });
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168
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169 } else {
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170 checkParent(colorSelector.getButton(), parent);
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171 }
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172 return colorSelector.getButton();
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173 }
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174
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175 /*
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176 * (non-Javadoc) Method declared on FieldEditor.
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177 */
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178 public int getNumberOfControls() {
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179 return 2;
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180 }
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181
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182 /*
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183 * (non-Javadoc)
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184 *
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185 * @see dwtx.jface.preference.FieldEditor#setEnabled(bool,
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186 * dwt.widgets.Composite)
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187 */
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188 public void setEnabled(bool enabled, Composite parent) {
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189 super.setEnabled(enabled, parent);
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190 getChangeControl(parent).setEnabled(enabled);
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191 }
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192
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193 }
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