Mercurial > projects > dwt-linux
annotate dwt/widgets/Scale.d @ 364:2bcb17ebe0be default tip
fix: thx torhu
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sun, 08 Nov 2009 20:57:46 +0100 |
| parents | c0d810de7093 |
| children |
| rev | line source |
|---|---|
| 72 | 1 /******************************************************************************* |
| 259 | 2 * Copyright (c) 2000, 2008 IBM Corporation and others. |
| 61 | 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 | |
| 72 | 10 * Port to the D programming language: |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 61 | 12 *******************************************************************************/ |
| 13 module dwt.widgets.Scale; | |
| 14 | |
| 15 | |
| 16 import dwt.widgets.Control; | |
| 17 import dwt.widgets.Composite; | |
| 18 import dwt.widgets.TypedListener; | |
| 71 | 19 import dwt.DWT; |
| 61 | 20 import dwt.internal.gtk.OS; |
| 21 import dwt.graphics.Point; | |
| 22 import dwt.events.SelectionListener; | |
| 23 | |
| 24 /** | |
| 25 * Instances of the receiver represent a selectable user | |
| 26 * interface object that present a range of continuous | |
| 27 * numeric values. | |
| 28 * <dl> | |
| 29 * <dt><b>Styles:</b></dt> | |
| 30 * <dd>HORIZONTAL, VERTICAL</dd> | |
| 31 * <dt><b>Events:</b></dt> | |
| 32 * <dd>Selection</dd> | |
| 33 * </dl> | |
| 34 * <p> | |
| 35 * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified. | |
| 36 * </p><p> | |
| 37 * <p> | |
| 38 * IMPORTANT: This class is intended to be subclassed <em>only</em> | |
| 71 | 39 * within the DWT implementation. |
| 61 | 40 * </p> |
| 259 | 41 * |
| 42 * @see <a href="http://www.eclipse.org/swt/snippets/#scale">Scale snippets</a> | |
| 43 * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Example: ControlExample</a> | |
| 44 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> | |
| 61 | 45 */ |
| 46 public class Scale : Control { | |
| 47 | |
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48 alias Control.computeSize computeSize; |
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49 |
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50 |
| 61 | 51 /** |
| 52 * Constructs a new instance of this class given its parent | |
| 53 * and a style value describing its behavior and appearance. | |
| 54 * <p> | |
| 55 * The style value is either one of the style constants defined in | |
| 71 | 56 * class <code>DWT</code> which is applicable to instances of this |
| 61 | 57 * class, or must be built by <em>bitwise OR</em>'ing together |
| 58 * (that is, using the <code>int</code> "|" operator) two or more | |
| 71 | 59 * of those <code>DWT</code> style constants. The class description |
| 61 | 60 * lists the style constants that are applicable to the class. |
| 61 * Style bits are also inherited from superclasses. | |
| 62 * </p> | |
| 63 * | |
| 64 * @param parent a composite control which will be the parent of the new instance (cannot be null) | |
| 65 * @param style the style of control to construct | |
| 66 * | |
| 67 * @exception IllegalArgumentException <ul> | |
| 68 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> | |
| 69 * </ul> | |
| 71 | 70 * @exception DWTException <ul> |
| 61 | 71 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| 72 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> | |
| 73 * </ul> | |
| 74 * | |
| 71 | 75 * @see DWT#HORIZONTAL |
| 76 * @see DWT#VERTICAL | |
| 61 | 77 * @see Widget#checkSubclass |
| 78 * @see Widget#getStyle | |
| 79 */ | |
| 80 public this (Composite parent, int style) { | |
| 81 super (parent, checkStyle (style)); | |
| 82 } | |
| 83 | |
| 84 /** | |
| 85 * Adds the listener to the collection of listeners who will | |
| 86 * be notified when the user changes the receiver's value, by sending | |
| 87 * it one of the messages defined in the <code>SelectionListener</code> | |
| 88 * interface. | |
| 89 * <p> | |
| 90 * <code>widgetSelected</code> is called when the user changes the receiver's value. | |
| 91 * <code>widgetDefaultSelected</code> is not called. | |
| 92 * </p> | |
| 93 * | |
| 94 * @param listener the listener which should be notified | |
| 95 * | |
| 96 * @exception IllegalArgumentException <ul> | |
| 97 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
| 98 * </ul> | |
| 71 | 99 * @exception DWTException <ul> |
| 61 | 100 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 101 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 102 * </ul> | |
| 103 * | |
| 104 * @see SelectionListener | |
| 105 * @see #removeSelectionListener | |
| 106 */ | |
| 107 public void addSelectionListener (SelectionListener listener) { | |
| 108 checkWidget (); | |
| 71 | 109 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); |
| 61 | 110 TypedListener typedListener = new TypedListener (listener); |
| 71 | 111 addListener (DWT.Selection,typedListener); |
| 112 addListener (DWT.DefaultSelection,typedListener); | |
| 61 | 113 } |
| 114 | |
| 115 static int checkStyle (int style) { | |
| 71 | 116 return checkBits (style, DWT.HORIZONTAL, DWT.VERTICAL, 0, 0, 0, 0); |
| 61 | 117 } |
| 118 | |
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119 public override Point computeSize (int wHint, int hHint, bool changed) { |
| 61 | 120 checkWidget(); |
| 71 | 121 if (wHint !is DWT.DEFAULT && wHint < 0) wHint = 0; |
| 122 if (hHint !is DWT.DEFAULT && hHint < 0) hHint = 0; | |
| 61 | 123 Point size = computeNativeSize(handle, wHint, hHint, changed); |
| 71 | 124 if ((style & DWT.HORIZONTAL) !is 0) { |
| 125 if (wHint is DWT.DEFAULT) size.x = 2 * size.x; | |
| 61 | 126 } else { |
| 71 | 127 if (hHint is DWT.DEFAULT) size.y = 2 * size.y; |
| 61 | 128 } |
| 129 return size; | |
| 130 } | |
| 131 | |
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132 override void createHandle (int index) { |
| 61 | 133 state |= HANDLE | THEME_BACKGROUND; |
| 134 fixedHandle = cast(GtkWidget*)OS.g_object_new (display.gtk_fixed_get_type (), null); | |
| 71 | 135 if (fixedHandle is null) error (DWT.ERROR_NO_HANDLES); |
| 61 | 136 OS.gtk_fixed_set_has_window (cast(GtkFixed*)fixedHandle, true); |
| 137 auto hAdjustment = OS.gtk_adjustment_new (0, 0, 100, 1, 10, 0); | |
| 71 | 138 if (hAdjustment is null) error (DWT.ERROR_NO_HANDLES); |
| 139 if ((style & DWT.HORIZONTAL) !is 0) { | |
| 61 | 140 handle = cast(GtkWidget*)OS.gtk_hscale_new (cast(GtkAdjustment*)hAdjustment); |
| 141 } else { | |
| 142 handle = cast(GtkWidget*)OS.gtk_vscale_new (cast(GtkAdjustment*)hAdjustment); | |
| 143 } | |
| 71 | 144 if (handle is null) error (DWT.ERROR_NO_HANDLES); |
| 61 | 145 OS.gtk_container_add (cast(GtkContainer*)fixedHandle, handle); |
| 146 OS.gtk_scale_set_digits (cast(GtkScale*)handle, 0); | |
| 147 OS.gtk_scale_set_draw_value (cast(GtkScale*)handle, false); | |
| 148 } | |
| 149 | |
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150 override void hookEvents () { |
| 61 | 151 super.hookEvents (); |
| 152 OS.g_signal_connect_closure (handle, OS.value_changed.ptr, display.closures [VALUE_CHANGED], false); | |
| 153 } | |
| 154 | |
| 155 /** | |
| 156 * Returns the amount that the receiver's value will be | |
| 157 * modified by when the up/down (or right/left) arrows | |
| 158 * are pressed. | |
| 159 * | |
| 160 * @return the increment | |
| 161 * | |
| 71 | 162 * @exception DWTException <ul> |
| 61 | 163 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 164 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 165 * </ul> | |
| 166 */ | |
| 167 public int getIncrement () { | |
| 168 checkWidget (); | |
| 169 auto hAdjustment = OS.gtk_range_get_adjustment (cast(GtkRange*)handle); | |
| 170 return cast(int) hAdjustment.step_increment; | |
| 171 } | |
| 172 | |
| 173 /** | |
| 174 * Returns the maximum value which the receiver will allow. | |
| 175 * | |
| 176 * @return the maximum | |
| 177 * | |
| 71 | 178 * @exception DWTException <ul> |
| 61 | 179 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 180 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 181 * </ul> | |
| 182 */ | |
| 183 public int getMaximum () { | |
| 184 checkWidget (); | |
| 185 auto hAdjustment = OS.gtk_range_get_adjustment (cast(GtkRange*)handle); | |
| 186 return cast(int) hAdjustment.upper; | |
| 187 } | |
| 188 | |
| 189 /** | |
| 190 * Returns the minimum value which the receiver will allow. | |
| 191 * | |
| 192 * @return the minimum | |
| 193 * | |
| 71 | 194 * @exception DWTException <ul> |
| 61 | 195 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 196 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 197 * </ul> | |
| 198 */ | |
| 199 public int getMinimum () { | |
| 200 checkWidget (); | |
| 201 auto hAdjustment = OS.gtk_range_get_adjustment (cast(GtkRange*)handle); | |
| 202 return cast(int) hAdjustment.lower; | |
| 203 } | |
| 204 | |
| 205 /** | |
| 206 * Returns the amount that the receiver's value will be | |
| 207 * modified by when the page increment/decrement areas | |
| 208 * are selected. | |
| 209 * | |
| 210 * @return the page increment | |
| 211 * | |
| 71 | 212 * @exception DWTException <ul> |
| 61 | 213 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 214 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 215 * </ul> | |
| 216 */ | |
| 217 public int getPageIncrement () { | |
| 218 checkWidget (); | |
| 219 auto hAdjustment = OS.gtk_range_get_adjustment (cast(GtkRange*)handle); | |
| 220 return cast(int) hAdjustment.page_increment; | |
| 221 } | |
| 222 | |
| 223 /** | |
| 224 * Returns the 'selection', which is the receiver's position. | |
| 225 * | |
| 226 * @return the selection | |
| 227 * | |
| 71 | 228 * @exception DWTException <ul> |
| 61 | 229 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 230 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 231 * </ul> | |
| 232 */ | |
| 233 public int getSelection () { | |
| 234 checkWidget (); | |
| 235 auto hAdjustment = OS.gtk_range_get_adjustment (cast(GtkRange*)handle); | |
| 236 return cast(int) hAdjustment.value; | |
| 237 } | |
| 238 | |
| 239 int /*long*/ gtk_value_changed (int /*long*/ adjustment) { | |
| 71 | 240 postEvent (DWT.Selection); |
| 61 | 241 return 0; |
| 242 } | |
| 243 | |
| 244 /** | |
| 245 * Removes the listener from the collection of listeners who will | |
| 246 * be notified when the user changes the receiver's value. | |
| 247 * | |
| 248 * @param listener the listener which should no longer be notified | |
| 249 * | |
| 250 * @exception IllegalArgumentException <ul> | |
| 251 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
| 252 * </ul> | |
| 71 | 253 * @exception DWTException <ul> |
| 61 | 254 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 255 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 256 * </ul> | |
| 257 * | |
| 258 * @see SelectionListener | |
| 259 * @see #addSelectionListener | |
| 260 */ | |
| 261 public void removeSelectionListener (SelectionListener listener) { | |
| 262 checkWidget (); | |
| 71 | 263 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); |
| 61 | 264 if (eventTable is null) return; |
| 71 | 265 eventTable.unhook (DWT.Selection, listener); |
| 266 eventTable.unhook (DWT.DefaultSelection,listener); | |
| 61 | 267 } |
| 268 | |
| 269 /** | |
| 270 * Sets the amount that the receiver's value will be | |
| 271 * modified by when the up/down (or right/left) arrows | |
| 272 * are pressed to the argument, which must be at least | |
| 273 * one. | |
| 274 * | |
| 275 * @param increment the new increment (must be greater than zero) | |
| 276 * | |
| 71 | 277 * @exception DWTException <ul> |
| 61 | 278 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 279 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 280 * </ul> | |
| 281 */ | |
| 282 public void setIncrement (int value) { | |
| 283 checkWidget (); | |
| 284 if (value < 1) return; | |
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285 OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, null, null, udVALUE_CHANGED); |
| 61 | 286 OS.gtk_range_set_increments (cast(GtkRange*)handle, value, getPageIncrement ()); |
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287 OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, null, null, udVALUE_CHANGED); |
| 61 | 288 } |
| 289 | |
| 290 /** | |
| 291 * Sets the maximum value that the receiver will allow. This new | |
| 292 * value will be ignored if it is not greater than the receiver's current | |
| 293 * minimum value. If the new maximum is applied then the receiver's | |
| 294 * selection value will be adjusted if necessary to fall within its new range. | |
| 295 * | |
| 296 * @param value the new maximum, which must be greater than the current minimum | |
| 297 * | |
| 71 | 298 * @exception DWTException <ul> |
| 61 | 299 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 300 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 301 * </ul> | |
| 302 */ | |
| 303 public void setMaximum (int value) { | |
| 304 checkWidget (); | |
| 305 int minimum = getMinimum(); | |
| 306 if (value <= minimum) return; | |
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307 OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, null, null, udVALUE_CHANGED); |
| 61 | 308 OS.gtk_range_set_range (cast(GtkRange*)handle, minimum, value); |
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309 OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, null, null, udVALUE_CHANGED); |
| 61 | 310 } |
| 311 | |
| 312 /** | |
| 313 * Sets the minimum value that the receiver will allow. This new | |
| 314 * value will be ignored if it is negative or is not less than the receiver's | |
| 315 * current maximum value. If the new minimum is applied then the receiver's | |
| 316 * selection value will be adjusted if necessary to fall within its new range. | |
| 317 * | |
| 318 * @param value the new minimum, which must be nonnegative and less than the current maximum | |
| 319 * | |
| 71 | 320 * @exception DWTException <ul> |
| 61 | 321 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 322 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 323 * </ul> | |
| 324 */ | |
| 325 public void setMinimum (int value) { | |
| 326 checkWidget (); | |
| 327 if (value < 0) return; | |
| 328 int maximum = getMaximum (); | |
| 329 if (value >= maximum) return; | |
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330 OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, null, null, udVALUE_CHANGED); |
| 61 | 331 OS.gtk_range_set_range (cast(GtkRange*)handle, value, maximum); |
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332 OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, null, null, udVALUE_CHANGED); |
| 61 | 333 } |
| 334 | |
| 335 /** | |
| 336 * Sets the amount that the receiver's value will be | |
| 337 * modified by when the page increment/decrement areas | |
| 338 * are selected to the argument, which must be at least | |
| 339 * one. | |
| 340 * | |
| 341 * @param pageIncrement the page increment (must be greater than zero) | |
| 342 * | |
| 71 | 343 * @exception DWTException <ul> |
| 61 | 344 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 345 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 346 * </ul> | |
| 347 */ | |
| 348 public void setPageIncrement (int value) { | |
| 349 checkWidget (); | |
| 350 if (value < 1) return; | |
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351 OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, null, null, udVALUE_CHANGED); |
| 61 | 352 OS.gtk_range_set_increments (cast(GtkRange*)handle, getIncrement (), value); |
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353 OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, null, null, udVALUE_CHANGED); |
| 61 | 354 } |
| 355 | |
| 356 /** | |
| 357 * Sets the 'selection', which is the receiver's value, | |
| 358 * to the argument which must be greater than or equal to zero. | |
| 359 * | |
| 360 * @param value the new selection (must be zero or greater) | |
| 361 * | |
| 71 | 362 * @exception DWTException <ul> |
| 61 | 363 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 364 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 365 * </ul> | |
| 366 */ | |
| 367 public void setSelection (int value) { | |
| 368 checkWidget (); | |
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369 OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, null, null, udVALUE_CHANGED); |
| 61 | 370 OS.gtk_range_set_value (cast(GtkRange*)handle, value); |
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371 OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, null, null, udVALUE_CHANGED); |
| 61 | 372 } |
| 373 | |
| 374 } |