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annotate org.eclipse.jface/src/org/eclipse/jface/preference/ScaleFieldEditor.d @ 125:c43718956f21 default tip

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Updated the snippets status.
author Jacob Carlborg <doob@me.com>
date Thu, 11 Aug 2011 19:55:14 +0200
parents 12b890a6392a
children
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1 /*******************************************************************************
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2 * Copyright (c) 2003, 2006 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.jface.preference.ScaleFieldEditor;
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14
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15 import org.eclipse.jface.preference.FieldEditor;
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16
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17 import org.eclipse.swt.SWT;
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18 import org.eclipse.swt.events.DisposeEvent;
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19 import org.eclipse.swt.events.DisposeListener;
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20 import org.eclipse.swt.events.SelectionAdapter;
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21 import org.eclipse.swt.events.SelectionEvent;
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22 import org.eclipse.swt.layout.GridData;
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23 import org.eclipse.swt.widgets.Composite;
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24 import org.eclipse.swt.widgets.Control;
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25 import org.eclipse.swt.widgets.Scale;
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26
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27 import java.lang.all;
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28 import java.util.Set;
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29
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30 /**
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31 * A field editor for an integer type preference. This class may be used as is,
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32 * or subclassed as required.
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33 *
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34 * @since 3.0
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35 */
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36 public class ScaleFieldEditor : FieldEditor {
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37
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38 /**
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39 * Value that will feed Scale.setIncrement(int).
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40 */
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41 private int incrementValue;
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42
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43 /**
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44 * Value that will feed Scale.setMaximum(int).
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45 */
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46 private int maxValue;
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47
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48 /**
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49 * Value that will feed Scale.setMinimum(int).
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50 */
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51 private int minValue;
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52
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53 /**
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54 * Old integer value.
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55 */
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56 private int oldValue;
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57
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58 /**
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59 * Value that will feed Scale.setPageIncrement(int).
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60 */
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61 private int pageIncrementValue;
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62
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63 /**
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64 * The scale, or <code>null</code> if none.
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65 */
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66 protected Scale scale;
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67
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68 /**
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69 * Creates a scale field editor.
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70 *
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71 * @param name
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72 * the name of the preference this field editor works on
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73 * @param labelText
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74 * the label text of the field editor
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75 * @param parent
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76 * the parent of the field editor's control
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77 */
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78 public this(String name, String labelText, Composite parent) {
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79 super(name, labelText, parent);
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80 setDefaultValues();
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81 }
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82
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83 /**
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84 * Creates a scale field editor with particular scale values.
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85 *
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86 * @param name
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87 * the name of the preference this field editor works on
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88 * @param labelText
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89 * the label text of the field editor
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90 * @param parent
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91 * the parent of the field editor's control
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92 * @param min
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93 * the value used for Scale.setMinimum(int).
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94 * @param max
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95 * the value used for Scale.setMaximum(int).
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96 * @param increment
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97 * the value used for Scale.setIncrement(int).
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98 * @param pageIncrement
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99 * the value used for Scale.setPageIncrement(int).
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100 */
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101 public this(String name, String labelText, Composite parent,
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102 int min, int max, int increment, int pageIncrement) {
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103 super(name, labelText, parent);
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104 setValues(min, max, increment, pageIncrement);
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105 }
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106
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107 /*
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108 * (non-Javadoc)
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109 *
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110 * @see org.eclipse.jface.preference.FieldEditor#adjustForNumColumns(int)
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111 */
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112 protected override void adjustForNumColumns(int numColumns) {
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113 (cast(GridData) scale.getLayoutData()).horizontalSpan = numColumns - 1;
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114 }
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115
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116 /*
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117 * (non-Javadoc)
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118 *
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119 * @see org.eclipse.jface.preference.FieldEditor#doFillIntoGrid(org.eclipse.swt.widgets.Composite,
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120 * int)
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121 */
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122 protected override void doFillIntoGrid(Composite parent, int numColumns) {
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123 Control control = getLabelControl(parent);
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124 GridData gd = new GridData();
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125 control.setLayoutData(gd);
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126
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127 scale = getScaleControl(parent);
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128 gd = new GridData(GridData.FILL_HORIZONTAL);
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129 gd.verticalAlignment = GridData.FILL;
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130 gd.horizontalSpan = numColumns - 1;
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131 gd.grabExcessHorizontalSpace = true;
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132 scale.setLayoutData(gd);
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133 updateScale();
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134 }
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135
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136 /*
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137 * (non-Javadoc)
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138 *
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139 * @see org.eclipse.jface.preference.FieldEditor#doLoad()
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140 */
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141 protected override void doLoad() {
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142 if (scale !is null) {
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143 int value = getPreferenceStore().getInt(getPreferenceName());
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144 scale.setSelection(value);
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145 oldValue = value;
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146 }
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147 }
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148
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149 /*
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150 * (non-Javadoc)
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151 *
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152 * @see org.eclipse.jface.preference.FieldEditor#doLoadDefault()
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153 */
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154 protected override void doLoadDefault() {
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155 if (scale !is null) {
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156 int value = getPreferenceStore().getDefaultInt(getPreferenceName());
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157 scale.setSelection(value);
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158 }
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159 valueChanged();
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160 }
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161
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162 /*
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163 * (non-Javadoc)
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164 *
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165 * @see org.eclipse.jface.preference.FieldEditor#doStore()
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166 */
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167 protected override void doStore() {
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168 getPreferenceStore()
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169 .setValue(getPreferenceName(), scale.getSelection());
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170 }
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171
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172 /**
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173 * Returns the value that will be used for Scale.setIncrement(int).
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174 *
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175 * @return the value.
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176 * @see org.eclipse.swt.widgets.Scale#setIncrement(int)
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177 */
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178 public int getIncrement() {
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179 return incrementValue;
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180 }
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181
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182 /**
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183 * Returns the value that will be used for Scale.setMaximum(int).
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184 *
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185 * @return the value.
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186 * @see org.eclipse.swt.widgets.Scale#setMaximum(int)
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187 */
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188 public int getMaximum() {
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189 return maxValue;
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190 }
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191
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192 /**
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193 * Returns the value that will be used for Scale.setMinimum(int).
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194 *
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195 * @return the value.
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196 * @see org.eclipse.swt.widgets.Scale#setMinimum(int)
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197 */
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198 public int getMinimum() {
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199 return minValue;
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200 }
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201
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202 /*
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203 * (non-Javadoc)
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204 *
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205 * @see org.eclipse.jface.preference.FieldEditor#getNumberOfControls()
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206 */
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207 public override int getNumberOfControls() {
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208 return 2;
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209 }
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210
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211 /**
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212 * Returns the value that will be used for Scale.setPageIncrement(int).
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213 *
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214 * @return the value.
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215 * @see org.eclipse.swt.widgets.Scale#setPageIncrement(int)
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216 */
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217 public int getPageIncrement() {
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218 return pageIncrementValue;
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219 }
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220
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221 /**
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222 * Returns this field editor's scale control.
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223 *
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224 * @return the scale control, or <code>null</code> if no scale field is
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225 * created yet
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226 */
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227 public Scale getScaleControl() {
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228 return scale;
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229 }
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230
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231 /**
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232 * Returns this field editor's scale control. The control is created if it
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233 * does not yet exist.
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234 *
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235 * @param parent
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236 * the parent
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237 * @return the scale control
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238 */
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239 private Scale getScaleControl(Composite parent) {
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240 if (scale is null) {
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241 scale = new Scale(parent, SWT.HORIZONTAL);
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242 scale.setFont(parent.getFont());
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243 scale.addSelectionListener(new class SelectionAdapter {
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244 public void widgetSelected(SelectionEvent event) {
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245 valueChanged();
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246 }
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247 });
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248 scale.addDisposeListener(new class DisposeListener {
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249 public void widgetDisposed(DisposeEvent event) {
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250 scale = null;
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251 }
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252 });
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253 } else {
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254 checkParent(scale, parent);
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255 }
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256 return scale;
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257 }
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258
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259 /**
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260 * Set default values for the various scale fields. These defaults are:<br>
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261 * <ul>
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262 * <li>Minimum = 0
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263 * <li>Maximim = 10
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264 * <li>Increment = 1
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265 * <li>Page Increment = 1
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266 * </ul>
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267 */
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268 private void setDefaultValues() {
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269 setValues(0, 10, 1, 1);
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270 }
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271
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272 /*
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273 * (non-Javadoc)
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274 *
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275 * @see org.eclipse.jface.preference.FieldEditor#setFocus()
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276 */
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277 public override void setFocus() {
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278 if (scale !is null && !scale.isDisposed()) {
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279 scale.setFocus();
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280 }
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281 }
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282
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283 /**
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284 * Set the value to be used for Scale.setIncrement(int) and update the
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285 * scale.
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286 *
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287 * @param increment
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288 * a value greater than 0.
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289 * @see org.eclipse.swt.widgets.Scale#setIncrement(int)
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290 */
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291 public void setIncrement(int increment) {
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292 this.incrementValue = increment;
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293 updateScale();
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294 }
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295
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296 /**
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297 * Set the value to be used for Scale.setMaximum(int) and update the
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298 * scale.
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299 *
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300 * @param max
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301 * a value greater than 0.
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302 * @see org.eclipse.swt.widgets.Scale#setMaximum(int)
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303 */
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304 public void setMaximum(int max) {
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305 this.maxValue = max;
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306 updateScale();
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307 }
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308
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309 /**
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310 * Set the value to be used for Scale.setMinumum(int) and update the
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311 * scale.
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312 *
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313 * @param min
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314 * a value greater than 0.
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315 * @see org.eclipse.swt.widgets.Scale#setMinimum(int)
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316 */
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317 public void setMinimum(int min) {
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318 this.minValue = min;
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319 updateScale();
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320 }
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321
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322 /**
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323 * Set the value to be used for Scale.setPageIncrement(int) and update the
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324 * scale.
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325 *
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326 * @param pageIncrement
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327 * a value greater than 0.
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328 * @see org.eclipse.swt.widgets.Scale#setPageIncrement(int)
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329 */
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330 public void setPageIncrement(int pageIncrement) {
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331 this.pageIncrementValue = pageIncrement;
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332 updateScale();
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333 }
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334
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335 /**
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336 * Set all Scale values.
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337 *
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338 * @param min
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339 * the value used for Scale.setMinimum(int).
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340 * @param max
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341 * the value used for Scale.setMaximum(int).
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342 * @param increment
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343 * the value used for Scale.setIncrement(int).
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344 * @param pageIncrement
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345 * the value used for Scale.setPageIncrement(int).
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346 */
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347 private void setValues(int min, int max, int increment, int pageIncrement) {
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348 this.incrementValue = increment;
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349 this.maxValue = max;
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350 this.minValue = min;
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351 this.pageIncrementValue = pageIncrement;
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352 updateScale();
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353 }
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354
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355 /**
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356 * Update the scale particulars with set values.
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357 */
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358 private void updateScale() {
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359 if (scale !is null && !scale.isDisposed()) {
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360 scale.setMinimum(getMinimum());
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361 scale.setMaximum(getMaximum());
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362 scale.setIncrement(getIncrement());
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363 scale.setPageIncrement(getPageIncrement());
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364 }
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365 }
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366
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367 /**
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368 * Informs this field editor's listener, if it has one, about a change to
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369 * the value (<code>VALUE</code> property) provided that the old and new
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370 * values are different.
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371 * <p>
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372 * This hook is <em>not</em> called when the scale is initialized (or
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373 * reset to the default value) from the preference store.
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374 * </p>
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375 */
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376 protected void valueChanged() {
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377 setPresentsDefaultValue(false);
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378
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379 int newValue = scale.getSelection();
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380 if (newValue !is oldValue) {
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381 fireStateChanged(IS_VALID, false, true);
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382 fireValueChanged(VALUE, new Integer(oldValue),
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383 new Integer(newValue));
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384 oldValue = newValue;
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385 }
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386 }
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387 }