Mercurial > projects > dwt-linux
annotate dwt/widgets/ProgressBar.d @ 240:ce446666f5a2
Update to SWT 3.4M7
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Mon, 12 May 2008 19:13:01 +0200 |
| parents | efba9cd3ee94 |
| children | c0d810de7093 |
| rev | line source |
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1 /******************************************************************************* |
| 84 | 2 * Copyright (c) 2000, 2007 IBM Corporation and others. |
| 3 * All rights reserved. This program and the accompanying materials | |
| 4 * are made available under the terms of the Eclipse Public License v1.0 | |
| 5 * which accompanies this distribution, and is available at | |
| 6 * http://www.eclipse.org/legal/epl-v10.html | |
| 7 * | |
| 8 * Contributors: | |
| 9 * IBM Corporation - initial API and implementation | |
| 108 | 10 * Port to the D programming language: |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 84 | 12 *******************************************************************************/ |
| 13 module dwt.widgets.ProgressBar; | |
| 14 | |
| 15 | |
| 16 | |
| 17 import dwt.DWT; | |
| 18 import dwt.DWTException; | |
| 19 import dwt.internal.gtk.OS; | |
| 20 | |
| 21 import dwt.widgets.Control; | |
| 22 import dwt.widgets.Composite; | |
| 23 import dwt.widgets.Display; | |
| 24 | |
| 25 import Math = tango.math.Math; | |
|
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26 import tango.io.Stdout; |
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27 |
| 84 | 28 /** |
| 29 * Instances of the receiver represent an unselectable | |
| 30 * user interface object that is used to display progress, | |
| 31 * typically in the form of a bar. | |
| 32 * <dl> | |
| 33 * <dt><b>Styles:</b></dt> | |
| 34 * <dd>SMOOTH, HORIZONTAL, VERTICAL, INDETERMINATE</dd> | |
| 35 * <dt><b>Events:</b></dt> | |
| 36 * <dd>(none)</dd> | |
| 37 * </dl> | |
| 38 * <p> | |
| 39 * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified. | |
| 40 * </p><p> | |
| 41 * IMPORTANT: This class is intended to be subclassed <em>only</em> | |
| 42 * within the DWT implementation. | |
| 43 * </p> | |
| 44 */ | |
| 45 public class ProgressBar : Control { | |
| 46 CallbackData callbackData; | |
| 47 int timerId, minimum = 0, maximum = 100, selection = 0; | |
| 48 static const int DELAY = 100; | |
| 49 | |
| 50 /** | |
| 51 * Constructs a new instance of this class given its parent | |
| 52 * and a style value describing its behavior and appearance. | |
| 53 * <p> | |
| 54 * The style value is either one of the style constants defined in | |
| 55 * class <code>DWT</code> which is applicable to instances of this | |
| 56 * class, or must be built by <em>bitwise OR</em>'ing together | |
| 57 * (that is, using the <code>int</code> "|" operator) two or more | |
| 58 * of those <code>DWT</code> style constants. The class description | |
| 59 * lists the style constants that are applicable to the class. | |
| 60 * Style bits are also inherited from superclasses. | |
| 61 * </p> | |
| 62 * | |
| 63 * @param parent a composite control which will be the parent of the new instance (cannot be null) | |
| 64 * @param style the style of control to construct | |
| 65 * | |
| 66 * @exception IllegalArgumentException <ul> | |
| 67 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> | |
| 68 * </ul> | |
| 69 * @exception DWTException <ul> | |
| 70 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> | |
| 71 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> | |
| 72 * </ul> | |
| 73 * | |
| 74 * @see DWT#SMOOTH | |
| 75 * @see DWT#HORIZONTAL | |
| 76 * @see DWT#VERTICAL | |
| 77 * @see Widget#checkSubclass | |
| 78 * @see Widget#getStyle | |
| 79 */ | |
| 80 public this (Composite parent, int style) { | |
| 81 super (parent, checkStyle(style)); | |
| 82 } | |
| 83 | |
| 84 static int checkStyle (int style) { | |
| 85 style |= DWT.NO_FOCUS; | |
| 86 return checkBits (style, DWT.HORIZONTAL, DWT.VERTICAL, 0, 0, 0, 0); | |
| 87 } | |
| 88 | |
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89 override void createHandle (int index) { |
| 84 | 90 state |= HANDLE; |
| 91 fixedHandle = cast(GtkWidget*)OS.g_object_new (display.gtk_fixed_get_type (), null); | |
| 92 if (fixedHandle is null) error (DWT.ERROR_NO_HANDLES); | |
| 93 OS.gtk_fixed_set_has_window (fixedHandle, true); | |
| 94 handle = OS.gtk_progress_bar_new (); | |
| 95 if (handle is null) error (DWT.ERROR_NO_HANDLES); | |
| 96 OS.gtk_container_add (fixedHandle, handle); | |
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97 int orientation = ((style & DWT.VERTICAL) !is 0 ) ? OS.GTK_PROGRESS_BOTTOM_TO_TOP : OS.GTK_PROGRESS_LEFT_TO_RIGHT; |
| 84 | 98 OS.gtk_progress_bar_set_orientation (handle, orientation); |
| 99 if ((style & DWT.INDETERMINATE) !is 0) { | |
| 100 timerId = display.doWindowTimerAdd( &callbackData, DELAY, handle ); | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 /** | |
| 105 * Returns the maximum value which the receiver will allow. | |
| 106 * | |
| 107 * @return the maximum | |
| 108 * | |
| 109 * @exception DWTException <ul> | |
| 110 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 111 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 112 * </ul> | |
| 113 */ | |
| 114 public int getMaximum () { | |
| 115 checkWidget (); | |
| 116 return maximum; | |
| 117 } | |
| 118 | |
| 119 /** | |
| 120 * Returns the minimum value which the receiver will allow. | |
| 121 * | |
| 122 * @return the minimum | |
| 123 * | |
| 124 * @exception DWTException <ul> | |
| 125 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 126 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 127 * </ul> | |
| 128 */ | |
| 129 public int getMinimum () { | |
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130 checkWidget (); |
| 84 | 131 return minimum; |
| 132 } | |
| 133 | |
| 134 /** | |
| 135 * Returns the single 'selection' that is the receiver's position. | |
| 136 * | |
| 137 * @return the selection | |
| 138 * | |
| 139 * @exception DWTException <ul> | |
| 140 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 141 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 142 * </ul> | |
| 143 */ | |
| 144 public int getSelection () { | |
| 145 checkWidget (); | |
| 146 return selection; | |
| 147 } | |
| 148 | |
| 240 | 149 public int getState () { |
| 150 checkWidget (); | |
| 151 return DWT.NORMAL; | |
| 152 } | |
| 153 | |
| 84 | 154 override int gtk_realize (GtkWidget* widget) { |
| 155 int result = super.gtk_realize (widget); | |
| 156 if (result !is 0) return result; | |
| 157 /* | |
| 158 * Bug in GTK. When a progress bar has been unrealized after being | |
| 159 * realized at least once, gtk_progress_bar_set_fraction() GP's. The | |
| 160 * fix is to update the progress bar state only when realized and restore | |
| 161 * the state when the progress bar becomes realized. | |
| 162 */ | |
| 163 updateBar (selection, minimum, maximum); | |
| 164 return 0; | |
| 165 } | |
| 166 | |
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167 override void releaseWidget () { |
| 84 | 168 super.releaseWidget (); |
| 169 if (timerId !is 0) OS.gtk_timeout_remove (timerId); | |
| 170 timerId = 0; | |
| 171 } | |
| 172 | |
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173 override void setParentBackground () { |
| 84 | 174 /* |
| 175 * Bug in GTK. For some reason, some theme managers will crash | |
| 176 * when the progress bar is inheriting the background from a parent. | |
| 177 * The fix is to stop inheriting the background. This is acceptable | |
| 178 * since progress bars do not use the inherited background. | |
| 179 */ | |
| 180 } | |
| 181 | |
| 182 /** | |
| 183 * Sets the maximum value that the receiver will allow. This new | |
| 184 * value will be ignored if it is not greater than the receiver's current | |
| 185 * minimum value. If the new maximum is applied then the receiver's | |
| 186 * selection value will be adjusted if necessary to fall within its new range. | |
| 187 * | |
| 188 * @param value the new maximum, which must be greater than the current minimum | |
| 189 * | |
| 190 * @exception DWTException <ul> | |
| 191 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 192 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 193 * </ul> | |
| 194 */ | |
| 195 public void setMaximum (int value) { | |
| 196 checkWidget (); | |
| 197 if (value <= minimum) return; | |
| 198 maximum = value; | |
| 199 selection = Math.min (selection, maximum); | |
| 200 updateBar (selection, minimum, maximum); | |
| 201 } | |
| 202 | |
| 203 /** | |
| 204 * Sets the minimum value that the receiver will allow. This new | |
| 205 * value will be ignored if it is negative or is not less than the receiver's | |
| 206 * current maximum value. If the new minimum is applied then the receiver's | |
| 207 * selection value will be adjusted if necessary to fall within its new range. | |
| 208 * | |
| 209 * @param value the new minimum, which must be nonnegative and less than the current maximum | |
| 210 * | |
| 211 * @exception DWTException <ul> | |
| 212 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 213 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 214 * </ul> | |
| 215 */ | |
| 216 public void setMinimum (int value) { | |
| 217 checkWidget (); | |
| 218 if (value < 0 || value >= maximum) return; | |
| 219 minimum = value; | |
| 220 selection = Math.max (selection, minimum); | |
| 221 updateBar (selection, minimum, maximum); | |
| 222 } | |
| 223 | |
| 224 /** | |
| 225 * Sets the single 'selection' that is the receiver's | |
| 226 * position to the argument which must be greater than or equal | |
| 227 * to zero. | |
| 228 * | |
| 229 * @param value the new selection (must be zero or greater) | |
| 230 * | |
| 231 * @exception DWTException <ul> | |
| 232 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 233 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 234 * </ul> | |
| 235 */ | |
| 236 public void setSelection (int value) { | |
| 237 checkWidget (); | |
| 238 selection = Math.max (minimum, Math.min (maximum, value)); | |
| 239 updateBar (selection, minimum, maximum); | |
| 240 } | |
| 241 | |
| 240 | 242 public void setState (int state) { |
| 243 checkWidget (); | |
| 244 //NOT IMPLEMENTED | |
| 245 } | |
| 246 | |
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247 override int /*long*/ timerProc (GtkWidget* widget) { |
| 84 | 248 if (isVisible ()) OS.gtk_progress_bar_pulse (handle); |
| 249 return 1; | |
| 250 } | |
| 251 | |
| 252 void updateBar (int selection, int minimum, int maximum) { | |
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de2578a843a7
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parents:
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diff
changeset
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253 /* |
| 84 | 254 * Bug in GTK. When a progress bar has been unrealized after being |
| 255 * realized at least once, gtk_progress_bar_set_fraction() GP's. The | |
| 256 * fix is to update the progress bar state only when realized and restore | |
| 257 * the state when the progress bar becomes realized. | |
| 258 */ | |
| 259 if ((OS.GTK_WIDGET_FLAGS (handle) & OS.GTK_REALIZED) is 0) return; | |
| 260 | |
| 261 double fraction = minimum is maximum ? 1 : cast(double)(selection - minimum) / (maximum - minimum); | |
| 262 OS.gtk_progress_bar_set_fraction (handle, fraction); | |
| 263 /* | |
| 264 * Feature in GTK. The progress bar does | |
| 265 * not redraw right away when a value is | |
| 266 * changed. This is not strictly incorrect | |
| 267 * but unexpected. The fix is to force all | |
| 268 * outstanding redraws to be delivered. | |
| 269 */ | |
| 270 auto window = paintWindow (); | |
| 271 OS.gdk_window_process_updates (window, false); | |
| 272 OS.gdk_flush (); | |
| 273 } | |
| 274 } |