Mercurial > projects > dwt-linux
annotate dwt/widgets/Label.d @ 207:12feeed18183
Allow Label.setText with null argument.
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sun, 09 Mar 2008 10:58:49 +0100 |
| parents | 17f8449522fd |
| children | 380bad9f6852 |
| rev | line source |
|---|---|
| 72 | 1 /******************************************************************************* |
| 64 | 2 * Copyright (c) 2000, 2006 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 | |
| 72 | 10 * Port to the D programming language: |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 64 | 12 *******************************************************************************/ |
| 13 module dwt.widgets.Label; | |
| 14 | |
| 15 | |
| 71 | 16 import dwt.DWT; |
| 64 | 17 import dwt.internal.gtk.OS; |
| 18 import dwt.graphics.Point; | |
| 19 import dwt.graphics.Image; | |
| 20 import dwt.widgets.Control; | |
| 21 import dwt.widgets.Composite; | |
| 22 import dwt.widgets.ImageList; | |
| 23 | |
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24 import dwt.dwthelper.utils; |
| 64 | 25 |
| 26 /** | |
| 27 * Instances of this class represent a non-selectable | |
| 28 * user interface object that displays a string or image. | |
| 29 * When SEPARATOR is specified, displays a single | |
| 30 * vertical or horizontal line. | |
| 31 * <dl> | |
| 32 * <dt><b>Styles:</b></dt> | |
| 33 * <dd>SEPARATOR, HORIZONTAL, VERTICAL</dd> | |
| 34 * <dd>SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd> | |
| 35 * <dd>CENTER, LEFT, RIGHT, WRAP</dd> | |
| 36 * <dt><b>Events:</b></dt> | |
| 37 * <dd>(none)</dd> | |
| 38 * </dl> | |
| 39 * <p> | |
| 40 * Note: Only one of SHADOW_IN, SHADOW_OUT and SHADOW_NONE may be specified. | |
| 41 * SHADOW_NONE is a HINT. Only one of HORIZONTAL and VERTICAL may be specified. | |
| 42 * Only one of CENTER, LEFT and RIGHT may be specified. | |
| 43 * </p><p> | |
| 44 * IMPORTANT: This class is intended to be subclassed <em>only</em> | |
| 71 | 45 * within the DWT implementation. |
| 64 | 46 * </p> |
| 47 */ | |
| 48 public class Label : Control { | |
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49 |
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50 alias Control.computeSize computeSize; |
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51 alias Control.mnemonicHit mnemonicHit; |
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52 alias Control.mnemonicMatch mnemonicMatch; |
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53 alias Control.setBackgroundColor setBackgroundColor; |
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54 alias Control.setBounds setBounds; |
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55 alias Control.setForegroundColor setForegroundColor; |
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56 |
| 64 | 57 GtkWidget* frameHandle, labelHandle, imageHandle; |
| 58 ImageList imageList; | |
| 59 Image image; | |
| 60 char[] text; | |
| 61 | |
| 62 /** | |
| 63 * Constructs a new instance of this class given its parent | |
| 64 * and a style value describing its behavior and appearance. | |
| 65 * <p> | |
| 66 * The style value is either one of the style constants defined in | |
| 71 | 67 * class <code>DWT</code> which is applicable to instances of this |
| 64 | 68 * class, or must be built by <em>bitwise OR</em>'ing together |
| 69 * (that is, using the <code>int</code> "|" operator) two or more | |
| 71 | 70 * of those <code>DWT</code> style constants. The class description |
| 64 | 71 * lists the style constants that are applicable to the class. |
| 72 * Style bits are also inherited from superclasses. | |
| 73 * </p> | |
| 74 * | |
| 75 * @param parent a composite control which will be the parent of the new instance (cannot be null) | |
| 76 * @param style the style of control to construct | |
| 77 * | |
| 78 * @exception IllegalArgumentException <ul> | |
| 79 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> | |
| 80 * </ul> | |
| 71 | 81 * @exception DWTException <ul> |
| 64 | 82 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| 83 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> | |
| 84 * </ul> | |
| 85 * | |
| 71 | 86 * @see DWT#SEPARATOR |
| 87 * @see DWT#HORIZONTAL | |
| 88 * @see DWT#VERTICAL | |
| 89 * @see DWT#SHADOW_IN | |
| 90 * @see DWT#SHADOW_OUT | |
| 91 * @see DWT#SHADOW_NONE | |
| 92 * @see DWT#CENTER | |
| 93 * @see DWT#LEFT | |
| 94 * @see DWT#RIGHT | |
| 95 * @see DWT#WRAP | |
| 64 | 96 * @see Widget#checkSubclass |
| 97 * @see Widget#getStyle | |
| 98 */ | |
| 99 public this (Composite parent, int style) { | |
| 100 super (parent, checkStyle (style)); | |
| 101 } | |
| 102 | |
| 103 static int checkStyle (int style) { | |
| 71 | 104 style |= DWT.NO_FOCUS; |
| 105 if ((style & DWT.SEPARATOR) !is 0) { | |
| 106 style = checkBits (style, DWT.VERTICAL, DWT.HORIZONTAL, 0, 0, 0, 0); | |
| 107 return checkBits (style, DWT.SHADOW_OUT, DWT.SHADOW_IN, DWT.SHADOW_NONE, 0, 0, 0); | |
| 64 | 108 } |
| 71 | 109 return checkBits (style, DWT.LEFT, DWT.CENTER, DWT.RIGHT, 0, 0, 0); |
| 64 | 110 } |
| 111 | |
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112 override void addRelation (Control control) { |
| 64 | 113 if (!control.isDescribedByLabel ()) return; |
| 114 if (labelHandle is null) return; | |
| 115 auto accessible = OS.gtk_widget_get_accessible (labelHandle); | |
| 116 auto controlAccessible = OS.gtk_widget_get_accessible (control.handle); | |
| 117 if (accessible !is null && controlAccessible !is null) { | |
| 118 OS.atk_object_add_relationship (controlAccessible, OS.ATK_RELATION_LABELLED_BY, accessible); | |
| 119 } | |
| 120 } | |
| 121 | |
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122 public override Point computeSize (int wHint, int hHint, bool changed) { |
| 64 | 123 checkWidget (); |
| 71 | 124 if (wHint !is DWT.DEFAULT && wHint < 0) wHint = 0; |
| 125 if (hHint !is DWT.DEFAULT && hHint < 0) hHint = 0; | |
| 126 if ((style & DWT.SEPARATOR) !is 0) { | |
| 127 if ((style & DWT.HORIZONTAL) !is 0) { | |
| 128 if (wHint is DWT.DEFAULT) wHint = DEFAULT_WIDTH; | |
| 64 | 129 } else { |
| 71 | 130 if (hHint is DWT.DEFAULT) hHint = DEFAULT_HEIGHT; |
| 64 | 131 } |
| 132 } | |
| 71 | 133 bool fixWrap = labelHandle !is null && (style & DWT.WRAP) !is 0; |
| 64 | 134 if (fixWrap || frameHandle !is null) forceResize (); |
| 135 int labelWidth, labelHeight; | |
| 136 if (fixWrap) { | |
| 137 OS.gtk_widget_get_size_request (labelHandle, &labelWidth, &labelHeight); | |
| 138 OS.gtk_widget_set_size_request (labelHandle, wHint, hHint); | |
| 139 } | |
| 140 Point size; | |
| 141 if (frameHandle !is null) { | |
| 142 int reqWidth, reqHeight; | |
| 143 OS.gtk_widget_get_size_request (handle, &reqWidth, &reqHeight); | |
| 144 OS.gtk_widget_set_size_request (handle, wHint, hHint); | |
| 145 size = computeNativeSize (frameHandle, -1, -1, changed); | |
| 146 OS.gtk_widget_set_size_request (handle, reqWidth, reqHeight); | |
| 147 } else { | |
| 148 size = computeNativeSize (handle, wHint, hHint, changed); | |
| 149 } | |
| 150 if (fixWrap) { | |
| 151 OS.gtk_widget_set_size_request (labelHandle, labelWidth, labelHeight); | |
| 152 } | |
| 153 /* | |
| 154 * Feature in GTK. Instead of using the font height to determine | |
| 155 * the preferred height of the widget, GTK uses the text metrics. | |
| 156 * The fix is to ensure that the preferred height is at least as | |
| 157 * tall as the font height. | |
| 158 * | |
| 159 * NOTE: This work around does not fix the case when there are | |
| 160 * muliple lines of text. | |
| 161 */ | |
| 71 | 162 if (hHint is DWT.DEFAULT && labelHandle !is null) { |
| 64 | 163 auto layout = OS.gtk_label_get_layout (cast(GtkLabel*)labelHandle); |
| 164 auto context = OS.pango_layout_get_context (layout); | |
| 165 auto lang = OS.pango_context_get_language (context); | |
| 166 auto font = getFontDescription (); | |
| 167 auto metrics = OS.pango_context_get_metrics (context, font, lang); | |
| 168 int ascent = OS.PANGO_PIXELS (OS.pango_font_metrics_get_ascent (metrics)); | |
| 169 int descent = OS.PANGO_PIXELS (OS.pango_font_metrics_get_descent (metrics)); | |
| 170 OS.pango_font_metrics_unref (metrics); | |
| 171 int fontHeight = ascent + descent; | |
| 172 int buffer; | |
| 173 OS.g_object_get1 (labelHandle, OS.ypad.ptr, &buffer); | |
| 174 fontHeight += 2 * buffer; | |
| 175 if (frameHandle !is null) { | |
| 176 auto style = OS.gtk_widget_get_style (frameHandle); | |
| 177 fontHeight += 2 * OS.gtk_style_get_ythickness (style); | |
| 178 fontHeight += 2 * OS.gtk_container_get_border_width (cast(GtkContainer*)frameHandle); | |
| 179 } | |
| 180 size.y = Math.max (size.y, fontHeight); | |
| 181 } | |
| 182 return size; | |
| 183 } | |
| 184 | |
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185 override void createHandle (int index) { |
| 64 | 186 state |= HANDLE | THEME_BACKGROUND; |
| 187 fixedHandle = cast(GtkWidget*)OS.g_object_new (display.gtk_fixed_get_type (), null); | |
| 71 | 188 if (fixedHandle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 189 OS.gtk_fixed_set_has_window (cast(GtkFixed*)fixedHandle, true); |
| 71 | 190 if ((style & DWT.SEPARATOR) !is 0) { |
| 191 if ((style & DWT.HORIZONTAL)!is 0) { | |
| 64 | 192 handle = OS.gtk_hseparator_new (); |
| 193 } else { | |
| 194 handle = OS.gtk_vseparator_new (); | |
| 195 } | |
| 71 | 196 if (handle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 197 } else { |
| 198 handle = OS.gtk_hbox_new (false, 0); | |
| 71 | 199 if (handle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 200 labelHandle = OS.gtk_label_new_with_mnemonic (null); |
| 71 | 201 if (labelHandle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 202 imageHandle = OS.gtk_image_new (); |
| 71 | 203 if (imageHandle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 204 OS.gtk_container_add (cast(GtkContainer*)handle, labelHandle); |
| 205 OS.gtk_container_add (cast(GtkContainer*)handle, imageHandle); | |
| 206 } | |
| 71 | 207 if ((style & DWT.BORDER) !is 0) { |
| 64 | 208 frameHandle = OS.gtk_frame_new (null); |
| 71 | 209 if (frameHandle is null) error (DWT.ERROR_NO_HANDLES); |
| 64 | 210 OS.gtk_container_add (cast(GtkContainer*)fixedHandle, frameHandle); |
| 211 OS.gtk_container_add (cast(GtkContainer*)frameHandle, handle); | |
| 212 OS.gtk_frame_set_shadow_type (cast(GtkFrame*)frameHandle, OS.GTK_SHADOW_ETCHED_IN); | |
| 213 } else { | |
| 214 OS.gtk_container_add (cast(GtkContainer*)fixedHandle, handle); | |
| 215 } | |
| 71 | 216 if ((style & DWT.SEPARATOR) !is 0) return; |
| 217 if ((style & DWT.WRAP) !is 0) OS.gtk_label_set_line_wrap (cast(GtkLabel*)labelHandle, true); | |
| 218 if ((style & DWT.LEFT) !is 0) { | |
| 64 | 219 OS.gtk_misc_set_alignment (cast(GtkMisc*)labelHandle, 0.0f, 0.0f); |
| 220 OS.gtk_label_set_justify (cast(GtkLabel*)labelHandle, OS.GTK_JUSTIFY_LEFT); | |
| 221 OS.gtk_misc_set_alignment (cast(GtkMisc*)imageHandle, 0.0f, 0.5f); | |
| 222 return; | |
| 223 } | |
| 71 | 224 if ((style & DWT.CENTER) !is 0) { |
| 64 | 225 OS.gtk_misc_set_alignment (cast(GtkMisc*)labelHandle, 0.5f, 0.0f); |
| 226 OS.gtk_label_set_justify (cast(GtkLabel*)labelHandle, OS.GTK_JUSTIFY_CENTER); | |
| 227 OS.gtk_misc_set_alignment (cast(GtkMisc*)imageHandle, 0.5f, 0.5f); | |
| 228 return; | |
| 229 } | |
| 71 | 230 if ((style & DWT.RIGHT) !is 0) { |
| 64 | 231 OS.gtk_misc_set_alignment (cast(GtkMisc*)labelHandle, 1.0f, 0.0f); |
| 232 OS.gtk_label_set_justify (cast(GtkLabel*)labelHandle, OS.GTK_JUSTIFY_RIGHT); | |
| 233 OS.gtk_misc_set_alignment (cast(GtkMisc*)imageHandle, 1.0f, 0.5f); | |
| 234 return; | |
| 235 } | |
| 236 } | |
| 237 | |
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238 override void createWidget (int index) { |
| 64 | 239 super.createWidget (index); |
| 240 text = ""; | |
| 241 } | |
| 242 | |
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243 override void deregister () { |
| 64 | 244 super.deregister (); |
| 245 if (frameHandle !is null) display.removeWidget (frameHandle); | |
| 246 if (labelHandle !is null) display.removeWidget (labelHandle); | |
| 247 if (imageHandle !is null) display.removeWidget (imageHandle); | |
| 248 } | |
| 249 | |
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250 override GtkWidget* eventHandle () { |
| 64 | 251 return fixedHandle; |
| 252 } | |
| 253 | |
| 254 /** | |
| 255 * Returns a value which describes the position of the | |
| 256 * text or image in the receiver. The value will be one of | |
| 257 * <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code> | |
| 258 * unless the receiver is a <code>SEPARATOR</code> label, in | |
| 259 * which case, <code>NONE</code> is returned. | |
| 260 * | |
| 261 * @return the alignment | |
| 262 * | |
| 71 | 263 * @exception DWTException <ul> |
| 64 | 264 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 265 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 266 * </ul> | |
| 267 */ | |
| 268 public int getAlignment () { | |
| 269 checkWidget (); | |
| 71 | 270 if ((style & DWT.SEPARATOR) !is 0) return 0; |
| 271 if ((style & DWT.LEFT) !is 0) return DWT.LEFT; | |
| 272 if ((style & DWT.CENTER) !is 0) return DWT.CENTER; | |
| 273 if ((style & DWT.RIGHT) !is 0) return DWT.RIGHT; | |
| 274 return DWT.LEFT; | |
| 64 | 275 } |
| 276 | |
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277 public override int getBorderWidth () { |
| 64 | 278 checkWidget(); |
| 279 if (frameHandle !is null) { | |
| 280 return OS.gtk_style_get_xthickness (OS.gtk_widget_get_style (frameHandle)); | |
| 281 } | |
| 282 return 0; | |
| 283 } | |
| 284 | |
| 285 /** | |
| 286 * Returns the receiver's image if it has one, or null | |
| 287 * if it does not. | |
| 288 * | |
| 289 * @return the receiver's image | |
| 290 * | |
| 71 | 291 * @exception DWTException <ul> |
| 64 | 292 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 293 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 294 * </ul> | |
| 295 */ | |
| 296 public Image getImage () { | |
| 297 checkWidget (); | |
| 298 return image; | |
| 299 } | |
| 300 | |
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301 override char[] getNameText () { |
| 64 | 302 return getText (); |
| 303 } | |
| 304 | |
| 305 /** | |
| 306 * Returns the receiver's text, which will be an empty | |
| 307 * string if it has never been set or if the receiver is | |
| 308 * a <code>SEPARATOR</code> label. | |
| 309 * | |
| 310 * @return the receiver's text | |
| 311 * | |
| 71 | 312 * @exception DWTException <ul> |
| 64 | 313 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 314 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 315 * </ul> | |
| 316 */ | |
| 317 public char[] getText () { | |
| 318 checkWidget (); | |
| 71 | 319 if ((style & DWT.SEPARATOR) !is 0) return ""; |
| 64 | 320 return text; |
| 321 } | |
| 322 | |
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323 override void hookEvents () { |
| 64 | 324 super.hookEvents(); |
| 325 if (labelHandle !is null) { | |
| 326 OS.g_signal_connect_closure_by_id (labelHandle, display.signalIds [MNEMONIC_ACTIVATE], 0, display.closures [MNEMONIC_ACTIVATE], false); | |
| 327 } | |
| 328 } | |
| 329 | |
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330 override bool isDescribedByLabel () { |
| 64 | 331 return false; |
| 332 } | |
| 333 | |
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334 override bool mnemonicHit (wchar key) { |
| 64 | 335 if (labelHandle is null) return false; |
| 336 bool result = super.mnemonicHit (labelHandle, key); | |
| 337 if (result) { | |
| 338 Composite control = this.parent; | |
| 339 while (control !is null) { | |
| 340 Control [] children = control._getChildren (); | |
| 341 int index = 0; | |
| 342 while (index < children.length) { | |
| 343 if (children [index] is this) break; | |
| 344 index++; | |
| 345 } | |
| 346 index++; | |
| 347 if (index < children.length) { | |
| 348 if (children [index].setFocus ()) return result; | |
| 349 } | |
| 350 control = control.parent; | |
| 351 } | |
| 352 } | |
| 353 return result; | |
| 354 } | |
| 355 | |
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356 override bool mnemonicMatch (wchar key) { |
| 64 | 357 if (labelHandle is null) return false; |
| 358 return mnemonicMatch (labelHandle, key); | |
| 359 } | |
| 360 | |
| 361 override void register () { | |
| 362 super.register (); | |
| 363 if (frameHandle !is null) display.addWidget (frameHandle, this); | |
| 364 if (labelHandle !is null) display.addWidget (labelHandle, this); | |
| 365 if (imageHandle !is null) display.addWidget (imageHandle, this); | |
| 366 } | |
| 367 | |
| 368 override void releaseHandle () { | |
| 369 super.releaseHandle (); | |
| 370 frameHandle = imageHandle = labelHandle = null; | |
| 371 } | |
| 372 | |
| 373 override void releaseWidget () { | |
| 374 super.releaseWidget (); | |
| 375 if (imageList !is null) imageList.dispose (); | |
| 376 imageList = null; | |
| 377 image = null; | |
| 378 text = null; | |
| 379 } | |
| 380 | |
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381 override void resizeHandle (int width, int height) { |
| 64 | 382 OS.gtk_widget_set_size_request (fixedHandle, width, height); |
| 383 OS.gtk_widget_set_size_request (frameHandle !is null ? frameHandle : handle, width, height); | |
| 384 } | |
| 385 | |
| 386 /** | |
| 387 * Controls how text and images will be displayed in the receiver. | |
| 388 * The argument should be one of <code>LEFT</code>, <code>RIGHT</code> | |
| 389 * or <code>CENTER</code>. If the receiver is a <code>SEPARATOR</code> | |
| 390 * label, the argument is ignored and the alignment is not changed. | |
| 391 * | |
| 392 * @param alignment the new alignment | |
| 393 * | |
| 71 | 394 * @exception DWTException <ul> |
| 64 | 395 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 396 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 397 * </ul> | |
| 398 */ | |
| 399 public void setAlignment (int alignment) { | |
| 400 checkWidget (); | |
| 71 | 401 if ((style & DWT.SEPARATOR) !is 0) return; |
| 402 if ((alignment & (DWT.LEFT | DWT.RIGHT | DWT.CENTER)) is 0) return; | |
| 403 style &= ~(DWT.LEFT | DWT.RIGHT | DWT.CENTER); | |
| 404 style |= alignment & (DWT.LEFT | DWT.RIGHT | DWT.CENTER); | |
| 405 bool isRTL = (style & DWT.RIGHT_TO_LEFT) !is 0; | |
| 406 if ((style & DWT.LEFT) !is 0) { | |
| 64 | 407 OS.gtk_misc_set_alignment (cast(GtkMisc*)labelHandle, 0.0f, 0.0f); |
| 408 OS.gtk_label_set_justify (cast(GtkLabel*)labelHandle, isRTL ? OS.GTK_JUSTIFY_RIGHT : OS.GTK_JUSTIFY_LEFT); | |
| 409 OS.gtk_misc_set_alignment (cast(GtkMisc*)imageHandle, 0.0f, 0.5f); | |
| 410 return; | |
| 411 } | |
| 71 | 412 if ((style & DWT.CENTER) !is 0) { |
| 64 | 413 OS.gtk_misc_set_alignment (cast(GtkMisc*)labelHandle, 0.5f, 0.0f); |
| 414 OS.gtk_label_set_justify (cast(GtkLabel*)labelHandle, OS.GTK_JUSTIFY_CENTER); | |
| 415 OS.gtk_misc_set_alignment (cast(GtkMisc*)imageHandle, 0.5f, 0.5f); | |
| 416 return; | |
| 417 } | |
| 71 | 418 if ((style & DWT.RIGHT) !is 0) { |
| 64 | 419 OS.gtk_misc_set_alignment (cast(GtkMisc*)labelHandle, 1.0f, 0.0f); |
| 420 OS.gtk_label_set_justify (cast(GtkLabel*)labelHandle, isRTL ? OS.GTK_JUSTIFY_LEFT : OS.GTK_JUSTIFY_RIGHT); | |
| 421 OS.gtk_misc_set_alignment (cast(GtkMisc*)imageHandle, 1.0f, 0.5f); | |
| 422 return; | |
| 423 } | |
| 424 } | |
| 425 | |
| 426 override void setBackgroundColor (GdkColor* color) { | |
| 427 super.setBackgroundColor (color); | |
| 428 setBackgroundColor(fixedHandle, color); | |
| 429 if (labelHandle !is null) setBackgroundColor(labelHandle, color); | |
| 430 if (imageHandle !is null) setBackgroundColor(imageHandle, color); | |
| 431 } | |
| 432 | |
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433 override int setBounds (int x, int y, int width, int height, bool move, bool resize) { |
| 64 | 434 /* |
| 435 * Bug in GTK. For some reason, when the label is | |
| 436 * wrappable and its container is resized, it does not | |
| 437 * cause the label to be wrapped. The fix is to | |
| 438 * determine the size that will wrap the label | |
| 439 * and expilictly set that size to force the label | |
| 440 * to wrap. | |
| 441 * | |
| 442 * This part of the fix causes the label to be | |
| 443 * resized to the preferred size but it still | |
| 444 * won't draw properly. | |
| 445 */ | |
| 71 | 446 bool fixWrap = resize && labelHandle !is null && (style & DWT.WRAP) !is 0; |
| 64 | 447 if (fixWrap) OS.gtk_widget_set_size_request (labelHandle, -1, -1); |
| 448 int result = super.setBounds (x, y, width, height, move, resize); | |
| 449 /* | |
| 450 * Bug in GTK. For some reason, when the label is | |
| 451 * wrappable and its container is resized, it does not | |
| 452 * cause the label to be wrapped. The fix is to | |
| 453 * determine the size that will wrap the label | |
| 454 * and expilictly set that size to force the label | |
| 455 * to wrap. | |
| 456 * | |
| 457 * This part of the fix forces the label to be | |
| 458 * resized so that it will draw wrapped. | |
| 459 */ | |
| 460 if (fixWrap) { | |
| 461 int labelWidth = OS.GTK_WIDGET_WIDTH (handle); | |
| 462 int labelHeight = OS.GTK_WIDGET_HEIGHT (handle); | |
| 463 OS.gtk_widget_set_size_request (labelHandle, labelWidth, labelHeight); | |
| 464 /* | |
| 465 * Bug in GTK. Setting the size request should invalidate the label's | |
| 466 * layout, but it does not. The fix is to resize the label directly. | |
| 467 */ | |
| 468 GtkRequisition requisition; | |
| 469 OS.gtk_widget_size_request (labelHandle, &requisition); | |
| 470 GtkAllocation allocation; | |
| 471 allocation.x = OS.GTK_WIDGET_X (labelHandle); | |
| 472 allocation.y = OS.GTK_WIDGET_Y (labelHandle); | |
| 473 allocation.width = labelWidth; | |
| 474 allocation.height = labelHeight; | |
| 475 OS.gtk_widget_size_allocate (labelHandle, &allocation); | |
| 476 } | |
| 477 return result; | |
| 478 } | |
| 479 | |
| 480 override void setFontDescription (PangoFontDescription* font) { | |
| 481 super.setFontDescription (font); | |
| 482 if (labelHandle !is null) OS.gtk_widget_modify_font (labelHandle, font); | |
| 483 if (imageHandle !is null) OS.gtk_widget_modify_font (imageHandle, font); | |
| 484 } | |
| 485 | |
| 486 override void setForegroundColor (GdkColor* color) { | |
| 487 super.setForegroundColor (color); | |
| 488 setForegroundColor (fixedHandle, color); | |
| 489 if (labelHandle !is null) setForegroundColor (labelHandle, color); | |
| 490 if (imageHandle !is null) setForegroundColor (imageHandle, color); | |
| 491 } | |
| 492 | |
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493 override void setOrientation () { |
| 64 | 494 super.setOrientation (); |
| 71 | 495 if ((style & DWT.RIGHT_TO_LEFT) !is 0) { |
| 64 | 496 if (labelHandle !is null) OS.gtk_widget_set_direction (labelHandle, OS.GTK_TEXT_DIR_RTL); |
| 497 if (imageHandle !is null) OS.gtk_widget_set_direction (imageHandle, OS.GTK_TEXT_DIR_RTL); | |
| 71 | 498 if ((style & DWT.LEAD) !is 0) { |
| 64 | 499 if (labelHandle !is null) OS.gtk_label_set_justify (cast(GtkLabel*)labelHandle, OS.GTK_JUSTIFY_RIGHT); |
| 500 } | |
| 71 | 501 if ((style & DWT.TRAIL) !is 0) { |
| 64 | 502 if (labelHandle !is null) OS.gtk_label_set_justify (cast(GtkLabel*)labelHandle, OS.GTK_JUSTIFY_LEFT); |
| 503 } | |
| 504 } | |
| 505 } | |
| 506 | |
| 507 /** | |
| 508 * Sets the receiver's image to the argument, which may be | |
| 509 * null indicating that no image should be displayed. | |
| 510 * | |
| 511 * @param image the image to display on the receiver (may be null) | |
| 512 * | |
| 513 * @exception IllegalArgumentException <ul> | |
| 514 * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> | |
| 515 * </ul> | |
| 71 | 516 * @exception DWTException <ul> |
| 64 | 517 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 518 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 519 * </ul> | |
| 520 */ | |
| 521 public void setImage (Image image) { | |
| 522 checkWidget (); | |
| 71 | 523 if ((style & DWT.SEPARATOR) !is 0) return; |
| 64 | 524 this.image = image; |
| 525 if (imageList !is null) imageList.dispose (); | |
| 526 imageList = null; | |
| 527 if (image !is null) { | |
| 528 imageList = new ImageList (); | |
| 529 int imageIndex = imageList.add (image); | |
| 530 auto pixbuf = imageList.getPixbuf (imageIndex); | |
| 531 OS.gtk_image_set_from_pixbuf (cast(GtkImage*)imageHandle, pixbuf); | |
| 532 OS.gtk_widget_hide (labelHandle); | |
| 533 OS.gtk_widget_show (imageHandle); | |
| 534 } else { | |
| 535 OS.gtk_image_set_from_pixbuf (cast(GtkImage*)imageHandle, null); | |
| 536 OS.gtk_widget_show (labelHandle); | |
| 537 OS.gtk_widget_hide (imageHandle); | |
| 538 } | |
| 539 } | |
| 540 | |
| 541 /** | |
| 542 * Sets the receiver's text. | |
| 543 * <p> | |
| 544 * This method sets the widget label. The label may include | |
| 545 * the mnemonic character and line delimiters. | |
| 546 * </p> | |
| 547 * <p> | |
| 548 * Mnemonics are indicated by an '&' that causes the next | |
| 549 * character to be the mnemonic. When the user presses a | |
| 550 * key sequence that matches the mnemonic, focus is assigned | |
| 551 * to the control that follows the label. On most platforms, | |
| 552 * the mnemonic appears underlined but may be emphasised in a | |
| 553 * platform specific manner. The mnemonic indicator character | |
| 554 * '&' can be escaped by doubling it in the string, causing | |
| 555 * a single '&' to be displayed. | |
| 556 * </p> | |
| 557 * | |
| 558 * @param string the new text | |
| 559 * | |
| 560 * @exception IllegalArgumentException <ul> | |
| 561 * <li>ERROR_NULL_ARGUMENT - if the text is null</li> | |
| 562 * </ul> | |
| 71 | 563 * @exception DWTException <ul> |
| 64 | 564 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 565 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 566 * </ul> | |
| 567 */ | |
| 568 public void setText (char[] string) { | |
| 569 checkWidget (); | |
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570 // DWT extension: allow null for zero length string |
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571 //if (string is null) error (DWT.ERROR_NULL_ARGUMENT); |
| 71 | 572 if ((style & DWT.SEPARATOR) !is 0) return; |
| 64 | 573 text = string; |
| 574 char [] chars = fixMnemonic (string); | |
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575 OS.gtk_label_set_text_with_mnemonic (cast(GtkLabel*)labelHandle, chars.toStringzValidPtr()); |
| 64 | 576 OS.gtk_widget_hide (imageHandle); |
| 577 OS.gtk_widget_show (labelHandle); | |
| 578 } | |
| 579 | |
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580 override void showWidget () { |
| 64 | 581 super.showWidget (); |
| 582 if (frameHandle !is null) OS.gtk_widget_show (frameHandle); | |
| 583 if (labelHandle !is null) OS.gtk_widget_show (labelHandle); | |
| 584 } | |
| 585 } |