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Upload of whole dwt tree
author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Sat, 09 Aug 2008 17:00:02 +0200
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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 *******************************************************************************/
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11 module dwt.widgets.Slider;
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12
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13 import dwt.dwthelper.utils;
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14
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15
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16 import dwt.DWT;
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17 import dwt.DWTException;
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18 import dwt.events.SelectionEvent;
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19 import dwt.events.SelectionListener;
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20 import dwt.graphics.Point;
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21 import dwt.internal.cocoa.NSRect;
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22 import dwt.internal.cocoa.NSScroller;
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23 import dwt.internal.cocoa.OS;
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24 import dwt.internal.cocoa.SWTScroller;
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25
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26 /**
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27 * Instances of this class are selectable user interface
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28 * objects that represent a range of positive, numeric values.
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29 * <p>
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30 * At any given moment, a given slider will have a
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31 * single 'selection' that is considered to be its
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32 * value, which is constrained to be within the range of
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33 * values the slider represents (that is, between its
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34 * <em>minimum</em> and <em>maximum</em> values).
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35 * </p><p>
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36 * Typically, sliders will be made up of five areas:
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37 * <ol>
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38 * <li>an arrow button for decrementing the value</li>
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39 * <li>a page decrement area for decrementing the value by a larger amount</li>
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40 * <li>a <em>thumb</em> for modifying the value by mouse dragging</li>
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41 * <li>a page increment area for incrementing the value by a larger amount</li>
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42 * <li>an arrow button for incrementing the value</li>
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43 * </ol>
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44 * Based on their style, sliders are either <code>HORIZONTAL</code>
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45 * (which have a left facing button for decrementing the value and a
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46 * right facing button for incrementing it) or <code>VERTICAL</code>
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47 * (which have an upward facing button for decrementing the value
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48 * and a downward facing buttons for incrementing it).
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49 * </p><p>
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50 * On some platforms, the size of the slider's thumb can be
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51 * varied relative to the magnitude of the range of values it
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52 * represents (that is, relative to the difference between its
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53 * maximum and minimum values). Typically, this is used to
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54 * indicate some proportional value such as the ratio of the
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55 * visible area of a document to the total amount of space that
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56 * it would take to display it. DWT supports setting the thumb
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57 * size even if the underlying platform does not, but in this
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58 * case the appearance of the slider will not change.
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59 * </p>
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60 * <dl>
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61 * <dt><b>Styles:</b></dt>
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62 * <dd>HORIZONTAL, VERTICAL</dd>
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63 * <dt><b>Events:</b></dt>
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64 * <dd>Selection</dd>
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65 * </dl>
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66 * <p>
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67 * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified.
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68 * </p><p>
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69 * IMPORTANT: This class is <em>not</em> intended to be subclassed.
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70 * </p>
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71 *
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72 * @see ScrollBar
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73 */
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74 public class Slider extends Control {
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75 bool dragging;
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76 int minimum, maximum, thumb;
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77 int increment = 1;
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78 int pageIncrement = 10;
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79
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80 /**
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81 * Constructs a new instance of this class given its parent
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82 * and a style value describing its behavior and appearance.
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83 * <p>
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84 * The style value is either one of the style constants defined in
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85 * class <code>DWT</code> which is applicable to instances of this
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86 * class, or must be built by <em>bitwise OR</em>'ing together
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87 * (that is, using the <code>int</code> "|" operator) two or more
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88 * of those <code>DWT</code> style constants. The class description
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89 * lists the style constants that are applicable to the class.
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90 * Style bits are also inherited from superclasses.
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91 * </p>
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92 *
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93 * @param parent a composite control which will be the parent of the new instance (cannot be null)
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94 * @param style the style of control to construct
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95 *
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96 * @exception IllegalArgumentException <ul>
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97 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
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98 * </ul>
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99 * @exception DWTException <ul>
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100 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
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101 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
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102 * </ul>
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103 *
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104 * @see DWT#HORIZONTAL
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105 * @see DWT#VERTICAL
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106 * @see Widget#checkSubclass
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107 * @see Widget#getStyle
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108 */
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109 public Slider (Composite parent, int style) {
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110 super (parent, checkStyle (style));
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111 }
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112
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113 /**
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114 * Adds the listener to the collection of listeners who will
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115 * be notified when the user changes the receiver's value, by sending
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116 * it one of the messages defined in the <code>SelectionListener</code>
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117 * interface.
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118 * <p>
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119 * When <code>widgetSelected</code> is called, the event object detail field contains one of the following values:
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120 * <code>DWT.NONE</code> - for the end of a drag.
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121 * <code>DWT.DRAG</code>.
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122 * <code>DWT.HOME</code>.
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123 * <code>DWT.END</code>.
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124 * <code>DWT.ARROW_DOWN</code>.
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125 * <code>DWT.ARROW_UP</code>.
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126 * <code>DWT.PAGE_DOWN</code>.
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127 * <code>DWT.PAGE_UP</code>.
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128 * <code>widgetDefaultSelected</code> is not called.
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129 * </p>
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130 *
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131 * @param listener the listener which should be notified when the user changes the receiver's value
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132 *
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133 * @exception IllegalArgumentException <ul>
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134 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
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135 * </ul>
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136 * @exception DWTException <ul>
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137 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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138 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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139 * </ul>
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140 *
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141 * @see SelectionListener
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142 * @see #removeSelectionListener
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143 * @see SelectionEvent
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144 */
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145 public void addSelectionListener(SelectionListener listener) {
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146 checkWidget();
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147 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
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148 TypedListener typedListener = new TypedListener(listener);
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149 addListener(DWT.Selection,typedListener);
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150 addListener(DWT.DefaultSelection,typedListener);
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151 }
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152
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153 static int checkStyle (int style) {
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154 return checkBits (style, DWT.HORIZONTAL, DWT.VERTICAL, 0, 0, 0, 0);
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155 }
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156
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157 public Point computeSize (int wHint, int hHint, bool changed) {
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158 checkWidget();
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159 int width = 0, height = 0;
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160 if ((style & DWT.HORIZONTAL) !is 0) {
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161 height = (int)NSScroller.scrollerWidth();
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162 width = height * 10;
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163 } else {
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164 width = (int)NSScroller.scrollerWidth();
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165 height = width * 10;
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166 }
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167 if (wHint !is DWT.DEFAULT) width = wHint;
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168 if (hHint !is DWT.DEFAULT) height = hHint;
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169 return new Point (width, height);
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170 }
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171
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172 void createHandle () {
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173 NSScroller widget = (NSScroller)new SWTScroller().alloc();
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174 NSRect rect = new NSRect();
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175 if ((style & DWT.HORIZONTAL) !is 0) {
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176 rect.width = 1;
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177 } else {
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178 rect.height = 1;
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179 }
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180 widget.initWithFrame(rect);
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181 widget.setEnabled(true);
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182 widget.setTarget(widget);
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183 widget.setAction(OS.sel_sendSelection);
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184 widget.setTag(jniRef);
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185 view = widget;
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186 parent.contentView().addSubview_(widget);
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187 updateBar(0, minimum, maximum, thumb);
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188 }
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189
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190 void createWidget () {
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191 maximum = 100;
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192 thumb = 10;
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193 super.createWidget();
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194 }
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195
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196 /**
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197 * Returns the amount that the receiver's value will be
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198 * modified by when the up/down (or right/left) arrows
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199 * are pressed.
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200 *
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201 * @return the increment
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202 *
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203 * @exception DWTException <ul>
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204 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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205 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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206 * </ul>
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207 */
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208 public int getIncrement () {
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209 checkWidget();
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210 return increment;
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211 }
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212
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213 /**
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214 * Returns the maximum value which the receiver will allow.
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215 *
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216 * @return the maximum
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217 *
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218 * @exception DWTException <ul>
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219 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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220 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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221 * </ul>
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222 */
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223 public int getMaximum () {
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224 checkWidget();
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225 return maximum;
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226 }
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227
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228 /**
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229 * Returns the minimum value which the receiver will allow.
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230 *
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231 * @return the minimum
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232 *
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233 * @exception DWTException <ul>
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234 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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235 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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236 * </ul>
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237 */
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238 public int getMinimum () {
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239 checkWidget();
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240 return minimum;
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241 }
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242
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243 /**
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244 * Returns the amount that the receiver's value will be
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245 * modified by when the page increment/decrement areas
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246 * are selected.
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247 *
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248 * @return the page increment
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249 *
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250 * @exception DWTException <ul>
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251 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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252 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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253 * </ul>
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254 */
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255 public int getPageIncrement () {
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parents:
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256 checkWidget();
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257 return pageIncrement;
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258 }
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259
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260 /**
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261 * Returns the 'selection', which is the receiver's value.
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262 *
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263 * @return the selection
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264 *
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265 * @exception DWTException <ul>
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parents:
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266 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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267 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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268 * </ul>
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269 */
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270 public int getSelection () {
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parents:
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271 checkWidget();
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parents:
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272 NSScroller widget = (NSScroller)view;
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273 float value = widget.floatValue();
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parents:
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274 return (int)((maximum - thumb - minimum) * value + minimum);
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275 }
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276
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277 /**
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parents:
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278 * Returns the size of the receiver's thumb relative to the
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parents:
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279 * difference between its maximum and minimum values.
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parents:
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280 *
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281 * @return the thumb value
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parents:
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282 *
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283 * @exception DWTException <ul>
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parents:
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284 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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parents:
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285 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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parents:
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286 * </ul>
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parents:
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287 */
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288 public int getThumb () {
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parents:
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289 checkWidget();
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parents:
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290 return thumb;
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parents:
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291 }
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parents:
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292
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parents:
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293 /**
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parents:
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294 * Removes the listener from the collection of listeners who will
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parents:
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295 * be notified when the user changes the receiver's value.
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parents:
diff changeset
296 *
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parents:
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297 * @param listener the listener which should no longer be notified
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parents:
diff changeset
298 *
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parents:
diff changeset
299 * @exception IllegalArgumentException <ul>
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parents:
diff changeset
300 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
301 * </ul>
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parents:
diff changeset
302 * @exception DWTException <ul>
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parents:
diff changeset
303 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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parents:
diff changeset
304 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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parents:
diff changeset
305 * </ul>
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parents:
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306 *
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parents:
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307 * @see SelectionListener
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parents:
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308 * @see #addSelectionListener
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
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309 */
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parents:
diff changeset
310 public void removeSelectionListener(SelectionListener listener) {
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parents:
diff changeset
311 checkWidget();
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parents:
diff changeset
312 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
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parents:
diff changeset
313 if (eventTable is null) return;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
314 eventTable.unhook(DWT.Selection, listener);
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parents:
diff changeset
315 eventTable.unhook(DWT.DefaultSelection,listener);
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parents:
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316 }
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parents:
diff changeset
317
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parents:
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318 void sendSelection () {
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parents:
diff changeset
319 Event event = new Event();
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
320 int hitPart = ((NSScroller)view).hitPart();
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parents:
diff changeset
321 int value = getSelection ();
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parents:
diff changeset
322 switch (hitPart) {
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
323 case OS.NSScrollerDecrementLine:
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parents:
diff changeset
324 event.detail = DWT.ARROW_UP;
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parents:
diff changeset
325 value -= increment;
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parents:
diff changeset
326 break;
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parents:
diff changeset
327 case OS.NSScrollerDecrementPage:
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
328 value -= pageIncrement;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
329 event.detail = DWT.PAGE_UP;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
330 break;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
331 case OS.NSScrollerIncrementLine:
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
332 value += increment;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
333 event.detail = DWT.PAGE_DOWN;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
334 break;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
335 case OS.NSScrollerIncrementPage:
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
336 value += pageIncrement;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
337 event.detail = DWT.ARROW_DOWN;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
338 break;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
339 case OS.NSScrollerKnob:
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
340 event.detail = DWT.DRAG;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
341 break;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
342 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
343 if (event.detail !is DWT.DRAG) {
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parents:
diff changeset
344 setSelection(value);
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
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345 }
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parents:
diff changeset
346 sendEvent(DWT.Selection, event);
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
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347 }
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
348
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
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349 /**
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
350 * Sets the amount that the receiver's value will be
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
351 * modified by when the up/down (or right/left) arrows
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
352 * are pressed to the argument, which must be at least
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
353 * one.
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
354 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
355 * @param value the new increment (must be greater than zero)
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
356 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
357 * @exception DWTException <ul>
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
358 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
359 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
360 * </ul>
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
361 */
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
362 public void setIncrement (int value) {
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parents:
diff changeset
363 checkWidget();
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
364 if (value < 1) return;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
365 increment = value;
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
366 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
367
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
368 /**
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
369 * Sets the maximum. If this value is negative or less than or
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
370 * equal to the minimum, the value is ignored. If necessary, first
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
371 * the thumb and then the selection are adjusted to fit within the
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
372 * new range.
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
373 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
374 * @param value the new maximum, which must be greater than the current minimum
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
375 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
376 * @exception DWTException <ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
377 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
378 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
379 * </ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
380 */
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
381 public void setMaximum (int value) {
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
382 checkWidget();
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
383 if (value < 0) return;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
384 if (value <= minimum) return;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
385 if (value - minimum < thumb) {
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
386 thumb = value - minimum;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
387 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
388 int selection = Math.max(minimum, Math.min (getSelection (), value - thumb));
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
389 this.maximum = value;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
390 updateBar(selection, minimum, value, thumb);
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
391 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
392
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
393 /**
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
394 * Sets the minimum value. If this value is negative or greater
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
395 * than or equal to the maximum, the value is ignored. If necessary,
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
396 * first the thumb and then the selection are adjusted to fit within
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
397 * the new range.
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
398 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
399 * @param value the new minimum
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
400 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
401 * @exception DWTException <ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
402 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
403 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
404 * </ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
405 */
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
406 public void setMinimum (int value) {
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
407 checkWidget();
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
408 if (value < 0) return;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
409 if (value >= maximum) return;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
410 if (maximum - value < thumb) {
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
411 thumb = maximum - value;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
412 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
413 int selection = Math.min(maximum - thumb, Math.max (getSelection (), value));
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
414 this.minimum = value;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
415 updateBar(selection, value, maximum, thumb);
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
416 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
417
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
418 /**
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
419 * Sets the amount that the receiver's value will be
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
420 * modified by when the page increment/decrement areas
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
421 * are selected to the argument, which must be at least
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
422 * one.
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
423 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
424 * @param value the page increment (must be greater than zero)
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
425 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
426 * @exception DWTException <ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
427 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
428 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
429 * </ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
430 */
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
431 public void setPageIncrement (int value) {
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
432 checkWidget();
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
433 if (value < 1) return;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
434 pageIncrement = value;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
435 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
436
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
437 /**
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
438 * Sets the 'selection', which is the receiver's
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
439 * value, to the argument which must be greater than or equal
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
440 * to zero.
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
441 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
442 * @param value the new selection (must be zero or greater)
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
443 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
444 * @exception DWTException <ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
445 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
446 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
447 * </ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
448 */
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
449 public void setSelection (int value) {
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
450 checkWidget();
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
451 updateBar(value, minimum, maximum, thumb);
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
452 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
453
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
454 void updateBar(int selection, int minimum, int maximum, int thumb) {
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
455 NSScroller widget = (NSScroller)view;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
456 selection = Math.max(minimum, Math.min(maximum - thumb, selection));
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
457 float fraction = minimum is maximum ? 1 : (float)(selection - minimum) / (maximum - thumb - minimum);
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
458 float knob = minimum is maximum ? 1 : (float)(thumb - minimum) / (maximum - minimum);
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
459 widget.setFloatValue(fraction, knob);
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
460 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
461
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
462 /**
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
463 * Sets the size of the receiver's thumb relative to the
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
464 * difference between its maximum and minimum values. This new
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
465 * value will be ignored if it is less than one, and will be
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
466 * clamped if it exceeds the receiver's current range.
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
467 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
468 * @param value the new thumb value, which must be at least one and not
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
469 * larger than the size of the current range
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
470 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
471 * @exception DWTException <ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
472 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
473 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
474 * </ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
475 */
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
476 public void setThumb (int value) {
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
477 checkWidget();
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
478 if (value < 1) return;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
479 value = Math.min (value, maximum - minimum);
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
480 this.thumb = value;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
481 updateBar(getSelection(), minimum, maximum, value);
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
482 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
483
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
484 /**
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
485 * Sets the receiver's selection, minimum value, maximum
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
486 * value, thumb, increment and page increment all at once.
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
487 * <p>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
488 * Note: This is similar to setting the values individually
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
489 * using the appropriate methods, but may be implemented in a
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
490 * more efficient fashion on some platforms.
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
491 * </p>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
492 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
493 * @param selection the new selection value
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
494 * @param minimum the new minimum value
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
495 * @param maximum the new maximum value
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
496 * @param thumb the new thumb value
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
497 * @param increment the new increment value
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
498 * @param pageIncrement the new pageIncrement value
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
499 *
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
500 * @exception DWTException <ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
501 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
502 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
503 * </ul>
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
504 */
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
505 public void setValues (int selection, int minimum, int maximum, int thumb, int increment, int pageIncrement) {
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
506 checkWidget();
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
507 if (minimum < 0) return;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
508 if (maximum < 0) return;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
509 if (thumb < 1) return;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
510 if (increment < 1) return;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
511 if (pageIncrement < 1) return;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
512 thumb = Math.min (thumb, maximum - minimum);
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
513 this.increment = increment;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
514 this.pageIncrement = pageIncrement;
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
515 updateBar(selection, minimum, maximum, thumb);
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
516 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
517
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
518 }