Mercurial > projects > dwt-win
annotate dwt/widgets/Scale.d @ 77:205350493476
Accessible linkable dummy.
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 05 Feb 2008 14:31:31 +0100 |
parents | adfa8c39be39 |
children | 1801ddeb8f32 |
rev | line source |
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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 |
77 | 10 * Port to the D programming language: |
11 * Frank Benoit <benoit@tionex.de> | |
31
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12 *******************************************************************************/ |
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13 module dwt.widgets.Scale; |
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14 |
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15 import dwt.DWT; |
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16 import dwt.DWTException; |
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17 import dwt.events.SelectionListener; |
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18 import dwt.graphics.Point; |
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19 import dwt.internal.win32.OS; |
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20 |
62 | 21 import dwt.widgets.Control; |
22 import dwt.widgets.Composite; | |
63 | 23 import dwt.widgets.TypedListener; |
24 import dwt.widgets.Event; | |
62 | 25 |
26 import dwt.dwthelper.utils; | |
27 | |
31
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28 /** |
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29 * Instances of the receiver represent a selectable user |
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30 * interface object that present a range of continuous |
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31 * numeric values. |
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32 * <dl> |
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33 * <dt><b>Styles:</b></dt> |
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34 * <dd>HORIZONTAL, VERTICAL</dd> |
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35 * <dt><b>Events:</b></dt> |
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36 * <dd>Selection</dd> |
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37 * </dl> |
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38 * <p> |
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39 * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified. |
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40 * </p><p> |
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41 * <p> |
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42 * IMPORTANT: This class is intended to be subclassed <em>only</em> |
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43 * within the DWT implementation. |
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44 * </p> |
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45 */ |
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46 |
62 | 47 public class Scale : Control { |
54
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48 |
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49 alias Control.computeSize computeSize; |
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50 alias Control.setBackgroundImage setBackgroundImage; |
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51 alias Control.windowProc windowProc; |
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52 |
31
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53 bool ignoreResize; |
62 | 54 static const WNDPROC TrackBarProc; |
55 static const TCHAR[] TrackBarClass = OS.TRACKBAR_CLASS; | |
56 static this() { | |
57 WNDCLASS lpWndClass; | |
58 OS.GetClassInfo (null, TrackBarClass.ptr, &lpWndClass); | |
31
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59 TrackBarProc = lpWndClass.lpfnWndProc; |
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60 /* |
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61 * Feature in Windows. The track bar window class |
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62 * does not include CS_DBLCLKS. This mean that these |
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63 * controls will not get double click messages such as |
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64 * WM_LBUTTONDBLCLK. The fix is to register a new |
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65 * window class with CS_DBLCLKS. |
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66 * |
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67 * NOTE: Screen readers look for the exact class name |
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68 * of the control in order to provide the correct kind |
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69 * of assistance. Therefore, it is critical that the |
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70 * new window class have the same name. It is possible |
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71 * to register a local window class with the same name |
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72 * as a global class. Since bits that affect the class |
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73 * are being changed, it is possible that other native |
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74 * code, other than DWT, could create a control with |
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75 * this class name, and fail unexpectedly. |
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76 */ |
62 | 77 auto hInstance = OS.GetModuleHandle (null); |
78 auto hHeap = OS.GetProcessHeap (); | |
31
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79 lpWndClass.hInstance = hInstance; |
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80 lpWndClass.style &= ~OS.CS_GLOBALCLASS; |
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81 lpWndClass.style |= OS.CS_DBLCLKS; |
63 | 82 int byteCount = (TrackBarClass.length+1) * TCHAR.sizeof; |
62 | 83 auto lpszClassName = cast(TCHAR*) OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, byteCount); |
63 | 84 OS.MoveMemory (lpszClassName, TrackBarClass.ptr, byteCount); |
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85 lpWndClass.lpszClassName = lpszClassName; |
63 | 86 OS.RegisterClass (&lpWndClass); |
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87 OS.HeapFree (hHeap, 0, lpszClassName); |
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88 } |
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89 |
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90 /** |
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91 * Constructs a new instance of this class given its parent |
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92 * and a style value describing its behavior and appearance. |
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93 * <p> |
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94 * The style value is either one of the style constants defined in |
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95 * class <code>DWT</code> which is applicable to instances of this |
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96 * class, or must be built by <em>bitwise OR</em>'ing together |
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97 * (that is, using the <code>int</code> "|" operator) two or more |
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98 * of those <code>DWT</code> style constants. The class description |
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99 * lists the style constants that are applicable to the class. |
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100 * Style bits are also inherited from superclasses. |
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101 * </p> |
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102 * |
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103 * @param parent a composite control which will be the parent of the new instance (cannot be null) |
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104 * @param style the style of control to construct |
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105 * |
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106 * @exception IllegalArgumentException <ul> |
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107 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
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108 * </ul> |
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109 * @exception DWTException <ul> |
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110 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
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111 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
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112 * </ul> |
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113 * |
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114 * @see DWT#HORIZONTAL |
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115 * @see DWT#VERTICAL |
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116 * @see Widget#checkSubclass |
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117 * @see Widget#getStyle |
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118 */ |
62 | 119 public this (Composite parent, int style) { |
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120 super (parent, checkStyle (style)); |
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121 } |
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122 |
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123 /** |
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124 * Adds the listener to the collection of listeners who will |
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125 * be notified when the user changes the receiver's value, by sending |
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126 * it one of the messages defined in the <code>SelectionListener</code> |
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127 * interface. |
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128 * <p> |
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129 * <code>widgetSelected</code> is called when the user changes the receiver's value. |
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130 * <code>widgetDefaultSelected</code> is not called. |
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131 * </p> |
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132 * |
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133 * @param listener the listener which should be notified |
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134 * |
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135 * @exception IllegalArgumentException <ul> |
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136 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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137 * </ul> |
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138 * @exception DWTException <ul> |
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139 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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140 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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141 * </ul> |
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142 * |
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143 * @see SelectionListener |
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144 * @see #removeSelectionListener |
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145 */ |
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146 public void addSelectionListener(SelectionListener listener) { |
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147 checkWidget (); |
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148 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); |
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149 TypedListener typedListener = new TypedListener (listener); |
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150 addListener (DWT.Selection,typedListener); |
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151 addListener (DWT.DefaultSelection,typedListener); |
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152 } |
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153 |
62 | 154 override LRESULT callWindowProc (HWND hwnd, int msg, int wParam, int lParam) { |
155 if (handle is null) return LRESULT.ZERO; | |
156 return cast(LRESULT)OS.CallWindowProc (TrackBarProc, hwnd, msg, wParam, lParam); | |
31
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157 } |
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158 |
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159 static int checkStyle (int style) { |
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160 return checkBits (style, DWT.HORIZONTAL, DWT.VERTICAL, 0, 0, 0, 0); |
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161 } |
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162 |
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163 override public Point computeSize (int wHint, int hHint, bool changed) { |
31
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164 checkWidget (); |
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165 int border = getBorderWidth (); |
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166 int width = border * 2, height = border * 2; |
62 | 167 RECT rect; |
168 OS.SendMessage (handle, OS.TBM_GETTHUMBRECT, 0, &rect); | |
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169 if ((style & DWT.HORIZONTAL) !is 0) { |
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170 width += OS.GetSystemMetrics (OS.SM_CXHSCROLL) * 10; |
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171 int scrollY = OS.GetSystemMetrics (OS.SM_CYHSCROLL); |
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172 height += (rect.top * 2) + scrollY + (scrollY / 3); |
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173 } else { |
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174 int scrollX = OS.GetSystemMetrics (OS.SM_CXVSCROLL); |
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175 width += (rect.left * 2) + scrollX + (scrollX / 3); |
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176 height += OS.GetSystemMetrics (OS.SM_CYVSCROLL) * 10; |
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177 } |
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178 if (wHint !is DWT.DEFAULT) width = wHint + (border * 2); |
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179 if (hHint !is DWT.DEFAULT) height = hHint + (border * 2); |
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180 return new Point (width, height); |
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181 } |
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182 |
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183 override void createHandle () { |
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184 super.createHandle (); |
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185 state |= THEME_BACKGROUND | DRAW_BACKGROUND; |
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186 OS.SendMessage (handle, OS.TBM_SETRANGEMAX, 0, 100); |
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187 OS.SendMessage (handle, OS.TBM_SETPAGESIZE, 0, 10); |
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188 OS.SendMessage (handle, OS.TBM_SETTICFREQ, 10, 0); |
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189 } |
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190 |
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191 override int defaultForeground () { |
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192 return OS.GetSysColor (OS.COLOR_BTNFACE); |
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193 } |
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194 |
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195 /** |
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196 * Returns the amount that the receiver's value will be |
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197 * modified by when the up/down (or right/left) arrows |
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198 * are pressed. |
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199 * |
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200 * @return the increment |
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201 * |
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202 * @exception DWTException <ul> |
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203 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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204 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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205 * </ul> |
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206 */ |
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207 public int getIncrement () { |
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208 checkWidget (); |
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209 return OS.SendMessage (handle, OS.TBM_GETLINESIZE, 0, 0); |
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210 } |
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211 |
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212 /** |
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213 * Returns the maximum value which the receiver will allow. |
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214 * |
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215 * @return the maximum |
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216 * |
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217 * @exception DWTException <ul> |
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218 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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219 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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220 * </ul> |
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221 */ |
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222 public int getMaximum () { |
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223 checkWidget (); |
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224 return OS.SendMessage (handle, OS.TBM_GETRANGEMAX, 0, 0); |
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225 } |
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226 |
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227 /** |
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228 * Returns the minimum value which the receiver will allow. |
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229 * |
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230 * @return the minimum |
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231 * |
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232 * @exception DWTException <ul> |
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233 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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234 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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235 * </ul> |
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236 */ |
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237 public int getMinimum () { |
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238 checkWidget (); |
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239 return OS.SendMessage (handle, OS.TBM_GETRANGEMIN, 0, 0); |
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240 } |
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241 |
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242 /** |
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243 * Returns the amount that the receiver's value will be |
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244 * modified by when the page increment/decrement areas |
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245 * are selected. |
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246 * |
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247 * @return the page increment |
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248 * |
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249 * @exception DWTException <ul> |
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250 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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251 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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252 * </ul> |
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253 */ |
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254 public int getPageIncrement () { |
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255 checkWidget (); |
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256 return OS.SendMessage (handle, OS.TBM_GETPAGESIZE, 0, 0); |
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257 } |
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258 |
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259 /** |
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260 * Returns the 'selection', which is the receiver's position. |
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261 * |
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262 * @return the selection |
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263 * |
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264 * @exception DWTException <ul> |
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265 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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266 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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267 * </ul> |
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268 */ |
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269 public int getSelection () { |
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270 checkWidget (); |
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271 return OS.SendMessage (handle, OS.TBM_GETPOS, 0, 0); |
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272 } |
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273 |
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274 /** |
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275 * Removes the listener from the collection of listeners who will |
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276 * be notified when the user changes the receiver's value. |
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277 * |
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278 * @param listener the listener which should no longer be notified |
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279 * |
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280 * @exception IllegalArgumentException <ul> |
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281 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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282 * </ul> |
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283 * @exception DWTException <ul> |
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284 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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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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286 * </ul> |
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287 * |
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288 * @see SelectionListener |
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289 * @see #addSelectionListener |
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290 */ |
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291 public void removeSelectionListener(SelectionListener listener) { |
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292 checkWidget (); |
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293 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); |
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294 if (eventTable is null) return; |
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295 eventTable.unhook (DWT.Selection, listener); |
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296 eventTable.unhook (DWT.DefaultSelection,listener); |
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297 } |
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298 |
63 | 299 override void setBackgroundImage (HBITMAP hImage) { |
31
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300 super.setBackgroundImage (hImage); |
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301 /* |
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302 * Bug in Windows. Changing the background color of the Scale |
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303 * widget and calling InvalidateRect() still draws with the old |
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304 * color. The fix is to send a fake WM_SIZE event to cause |
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305 * it to redraw with the new background color. |
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306 */ |
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307 ignoreResize = true; |
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308 OS.SendMessage (handle, OS.WM_SIZE, 0, 0); |
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309 ignoreResize = false; |
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310 } |
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311 |
54
0f25be5cbe6f
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312 override void setBackgroundPixel (int pixel) { |
31
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313 super.setBackgroundPixel (pixel); |
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314 /* |
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315 * Bug in Windows. Changing the background color of the Scale |
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316 * widget and calling InvalidateRect() still draws with the old |
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317 * color. The fix is to send a fake WM_SIZE event to cause |
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318 * it to redraw with the new background color. |
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319 */ |
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320 ignoreResize = true; |
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321 OS.SendMessage (handle, OS.WM_SIZE, 0, 0); |
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322 ignoreResize = false; |
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323 } |
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324 |
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325 /** |
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326 * Sets the amount that the receiver's value will be |
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327 * modified by when the up/down (or right/left) arrows |
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328 * are pressed to the argument, which must be at least |
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329 * one. |
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330 * |
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331 * @param increment the new increment (must be greater than zero) |
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332 * |
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333 * @exception DWTException <ul> |
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334 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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335 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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336 * </ul> |
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337 */ |
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338 public void setIncrement (int increment) { |
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339 checkWidget (); |
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340 if (increment < 1) return; |
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341 int minimum = OS.SendMessage (handle, OS.TBM_GETRANGEMIN, 0, 0); |
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342 int maximum = OS.SendMessage (handle, OS.TBM_GETRANGEMAX, 0, 0); |
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343 if (increment > maximum - minimum) return; |
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344 OS.SendMessage (handle, OS.TBM_SETLINESIZE, 0, increment); |
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345 } |
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346 |
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347 /** |
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348 * Sets the maximum value that the receiver will allow. This new |
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349 * value will be ignored if it is not greater than the receiver's current |
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350 * minimum value. If the new maximum is applied then the receiver's |
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351 * selection value will be adjusted if necessary to fall within its new range. |
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352 * |
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353 * @param value the new maximum, which must be greater than the current minimum |
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354 * |
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355 * @exception DWTException <ul> |
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356 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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357 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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358 * </ul> |
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359 */ |
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360 public void setMaximum (int value) { |
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361 checkWidget (); |
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362 int minimum = OS.SendMessage (handle, OS.TBM_GETRANGEMIN, 0, 0); |
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363 if (0 <= minimum && minimum < value) { |
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364 OS.SendMessage (handle, OS.TBM_SETRANGEMAX, 1, value); |
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365 } |
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366 } |
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367 |
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368 /** |
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369 * Sets the minimum value that the receiver will allow. This new |
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370 * value will be ignored if it is negative or is not less than the receiver's |
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371 * current maximum value. If the new minimum is applied then the receiver's |
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372 * selection value will be adjusted if necessary to fall within its new range. |
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373 * |
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374 * @param value the new minimum, which must be nonnegative and less than the current maximum |
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375 * |
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376 * @exception DWTException <ul> |
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377 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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378 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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379 * </ul> |
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380 */ |
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381 public void setMinimum (int value) { |
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382 checkWidget (); |
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383 int maximum = OS.SendMessage (handle, OS.TBM_GETRANGEMAX, 0, 0); |
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384 if (0 <= value && value < maximum) { |
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385 OS.SendMessage (handle, OS.TBM_SETRANGEMIN, 1, value); |
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386 } |
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387 } |
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388 |
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389 /** |
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390 * Sets the amount that the receiver's value will be |
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391 * modified by when the page increment/decrement areas |
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392 * are selected to the argument, which must be at least |
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393 * one. |
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394 * |
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395 * @param pageIncrement the page increment (must be greater than zero) |
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396 * |
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397 * @exception DWTException <ul> |
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398 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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399 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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400 * </ul> |
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401 */ |
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402 public void setPageIncrement (int pageIncrement) { |
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403 checkWidget (); |
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404 if (pageIncrement < 1) return; |
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405 int minimum = OS.SendMessage (handle, OS.TBM_GETRANGEMIN, 0, 0); |
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406 int maximum = OS.SendMessage (handle, OS.TBM_GETRANGEMAX, 0, 0); |
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407 if (pageIncrement > maximum - minimum) return; |
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408 OS.SendMessage (handle, OS.TBM_SETPAGESIZE, 0, pageIncrement); |
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409 OS.SendMessage (handle, OS.TBM_SETTICFREQ, pageIncrement, 0); |
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410 } |
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411 |
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412 /** |
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413 * Sets the 'selection', which is the receiver's value, |
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414 * to the argument which must be greater than or equal to zero. |
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415 * |
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416 * @param value the new selection (must be zero or greater) |
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417 * |
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418 * @exception DWTException <ul> |
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419 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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420 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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421 * </ul> |
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422 */ |
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423 public void setSelection (int value) { |
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424 checkWidget (); |
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425 OS.SendMessage (handle, OS.TBM_SETPOS, 1, value); |
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426 } |
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427 |
54
0f25be5cbe6f
Added aliases and overrides from generated file, remaining widgets. Thanks torhu for doing this job.
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428 override int widgetStyle () { |
31
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429 int bits = super.widgetStyle () | OS.WS_TABSTOP | OS.TBS_BOTH | OS.TBS_AUTOTICKS; |
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430 if ((style & DWT.HORIZONTAL) !is 0) return bits | OS.TBS_HORZ | OS.TBS_DOWNISLEFT; |
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431 return bits | OS.TBS_VERT; |
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432 } |
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433 |
63 | 434 override char[] windowClass () { |
435 return TCHARsToStr(TrackBarClass); | |
31
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436 } |
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437 |
54
0f25be5cbe6f
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438 override int windowProc () { |
63 | 439 return cast(int) TrackBarProc; |
31
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440 } |
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441 |
54
0f25be5cbe6f
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442 override LRESULT WM_PAINT (int wParam, int lParam) { |
31
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443 /* |
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444 * Bug in Windows. For some reason, when WM_CTLCOLORSTATIC |
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445 * is used to implement transparency and returns a NULL brush, |
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446 * Windows doesn't always draw the track bar. It seems that |
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447 * it is drawn correctly the first time. It is possible that |
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448 * Windows double buffers the control and the double buffer |
92c102dd64a3
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449 * strategy fails when WM_CTLCOLORSTATIC returns unexpected |
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450 * results. The fix is to send a fake WM_SIZE to force it |
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451 * to redraw every time there is a WM_PAINT. |
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452 */ |
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453 bool fixPaint = findBackgroundControl () !is null; |
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454 if (!fixPaint) { |
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455 if (OS.COMCTL32_MAJOR >= 6 && OS.IsAppThemed ()) { |
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parents:
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456 Control control = findThemeControl (); |
92c102dd64a3
Added all widgets modules as dummy. Most modules of accessible are equal to the linux version, except Accessible.
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457 fixPaint = control !is null; |
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458 } |
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459 } |
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460 if (fixPaint) { |
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461 bool redraw = drawCount is 0 && OS.IsWindowVisible (handle); |
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462 if (redraw) OS.SendMessage (handle, OS.WM_SETREDRAW, 0, 0); |
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463 ignoreResize = true; |
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464 OS.SendMessage (handle, OS.WM_SIZE, 0, 0); |
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465 ignoreResize = false; |
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466 if (redraw) { |
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467 OS.SendMessage (handle, OS.WM_SETREDRAW, 1, 0); |
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468 OS.InvalidateRect (handle, null, false); |
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469 } |
92c102dd64a3
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470 } |
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471 return super.WM_PAINT (wParam, lParam); |
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472 } |
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473 |
54
0f25be5cbe6f
Added aliases and overrides from generated file, remaining widgets. Thanks torhu for doing this job.
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474 override LRESULT WM_SIZE (int wParam, int lParam) { |
63 | 475 if (ignoreResize) return LRESULT.NULL; |
31
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476 return super.WM_SIZE (wParam, lParam); |
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477 } |
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478 |
54
0f25be5cbe6f
Added aliases and overrides from generated file, remaining widgets. Thanks torhu for doing this job.
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479 override LRESULT wmScrollChild (int wParam, int lParam) { |
31
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480 |
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481 /* Do nothing when scrolling is ending */ |
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482 int code = wParam & 0xFFFF; |
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483 switch (code) { |
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484 case OS.TB_ENDTRACK: |
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485 case OS.TB_THUMBPOSITION: |
62 | 486 return LRESULT.NULL; |
31
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487 } |
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488 |
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489 Event event = new Event (); |
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490 /* |
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491 * This code is intentionally commented. The event |
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492 * detail field is not currently supported on all |
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493 * platforms. |
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494 */ |
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495 // switch (code) { |
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496 // case OS.TB_TOP: event.detail = DWT.HOME; break; |
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497 // case OS.TB_BOTTOM: event.detail = DWT.END; break; |
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498 // case OS.TB_LINEDOWN: event.detail = DWT.ARROW_DOWN; break; |
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499 // case OS.TB_LINEUP: event.detail = DWT.ARROW_UP; break; |
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500 // case OS.TB_PAGEDOWN: event.detail = DWT.PAGE_DOWN; break; |
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501 // case OS.TB_PAGEUP: event.detail = DWT.PAGE_UP; break; |
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502 // } |
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503 |
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504 /* |
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505 * Send the event because WM_HSCROLL and WM_VSCROLL |
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506 * are sent from a modal message loop in windows that |
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507 * is active when the user is scrolling. |
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508 */ |
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509 sendEvent (DWT.Selection, event); |
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510 // widget could be disposed at this point |
62 | 511 return LRESULT.NULL; |
31
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512 } |
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513 |
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514 } |
62 | 515 |