Mercurial > projects > dwt-linux
annotate dwt/widgets/CoolItem.d @ 255:5a30aa9820f3
removed tango.stdc.stringz imports and allow null for arrays and string arguments.
author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 15 Jun 2008 22:32:20 +0200 |
parents | ce446666f5a2 |
children | c0d810de7093 |
rev | line source |
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150
f2e04420fd6c
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1 /******************************************************************************* |
76 | 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> | |
76 | 12 *******************************************************************************/ |
13 module dwt.widgets.CoolItem; | |
14 | |
15 import dwt.DWT; | |
16 import dwt.DWTException; | |
17 import dwt.events.SelectionEvent; | |
18 import dwt.events.SelectionListener; | |
19 import dwt.graphics.Color; | |
20 import dwt.graphics.GC; | |
21 import dwt.graphics.Image; | |
22 import dwt.graphics.ImageData; | |
23 import dwt.graphics.PaletteData; | |
24 import dwt.graphics.Point; | |
25 import dwt.graphics.RGB; | |
26 import dwt.graphics.Rectangle; | |
27 import dwt.widgets.Item; | |
28 import dwt.widgets.Control; | |
29 import dwt.widgets.CoolBar; | |
30 import dwt.widgets.ToolBar; | |
31 import dwt.widgets.Event; | |
32 import dwt.widgets.TypedListener; | |
33 import dwt.widgets.ToolBar; | |
34 import dwt.widgets.ToolItem; | |
35 import dwt.widgets.Listener; | |
36 | |
37 /** | |
38 * Instances of this class are selectable user interface | |
39 * objects that represent the dynamically positionable | |
40 * areas of a <code>CoolBar</code>. | |
41 * <dl> | |
42 * <dt><b>Styles:</b></dt> | |
43 * <dd>DROP_DOWN</dd> | |
44 * <dt><b>Events:</b></dt> | |
45 * <dd>Selection</dd> | |
46 * </dl> | |
47 * <p> | |
48 * IMPORTANT: This class is <em>not</em> intended to be subclassed. | |
49 * </p> | |
50 */ | |
51 public class CoolItem : Item { | |
52 Control control; | |
53 CoolBar parent; | |
54 bool ideal; | |
55 int preferredWidth, preferredHeight, minimumWidth, minimumHeight, requestedWidth; | |
56 Rectangle itemBounds; | |
57 | |
58 static const int MARGIN_WIDTH = 4; | |
59 static const int GRABBER_WIDTH = 2; | |
60 static const int MINIMUM_WIDTH = (2 * MARGIN_WIDTH) + GRABBER_WIDTH; | |
61 | |
62 private int CHEVRON_HORIZONTAL_TRIM = -1; //platform dependent values | |
63 private int CHEVRON_VERTICAL_TRIM = -1; | |
64 private static const int CHEVRON_LEFT_MARGIN = 2; | |
65 private static const int CHEVRON_IMAGE_WIDTH = 8; //Width to draw the double arrow | |
66 | |
67 ToolBar chevron; | |
68 bool wrap; | |
69 Image arrowImage = null; | |
70 | |
71 /** | |
72 * Constructs a new instance of this class given its parent | |
73 * (which must be a <code>CoolBar</code>) and a style value | |
74 * describing its behavior and appearance. The item is added | |
75 * to the end of the items maintained by its parent. | |
76 * <p> | |
77 * The style value is either one of the style constants defined in | |
78 * class <code>DWT</code> which is applicable to instances of this | |
79 * class, or must be built by <em>bitwise OR</em>'ing together | |
80 * (that is, using the <code>int</code> "|" operator) two or more | |
81 * of those <code>DWT</code> style constants. The class description | |
82 * lists the style constants that are applicable to the class. | |
83 * Style bits are also inherited from superclasses. | |
84 * </p> | |
85 * | |
86 * @param parent a composite control which will be the parent of the new instance (cannot be null) | |
87 * @param style the style of control to construct | |
88 * | |
89 * @exception IllegalArgumentException <ul> | |
90 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> | |
91 * </ul> | |
92 * @exception DWTException <ul> | |
93 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> | |
94 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> | |
95 * </ul> | |
96 * | |
97 * @see DWT#DROP_DOWN | |
98 * @see Widget#checkSubclass | |
99 * @see Widget#getStyle | |
100 */ | |
101 public this (CoolBar parent, int style) { | |
102 super(parent, style); | |
103 itemBounds = new Rectangle(0, 0, 0, 0); | |
104 this.parent = parent; | |
105 parent.createItem (this, parent.getItemCount()); | |
106 calculateChevronTrim (); | |
107 } | |
108 /** | |
109 * Constructs a new instance of this class given its parent | |
110 * (which must be a <code>CoolBar</code>), a style value | |
111 * describing its behavior and appearance, and the index | |
112 * at which to place it in the items maintained by its parent. | |
113 * <p> | |
114 * The style value is either one of the style constants defined in | |
115 * class <code>DWT</code> which is applicable to instances of this | |
116 * class, or must be built by <em>bitwise OR</em>'ing together | |
117 * (that is, using the <code>int</code> "|" operator) two or more | |
118 * of those <code>DWT</code> style constants. The class description | |
119 * lists the style constants that are applicable to the class. | |
120 * Style bits are also inherited from superclasses. | |
121 * </p> | |
122 * | |
123 * @param parent a composite control which will be the parent of the new instance (cannot be null) | |
124 * @param style the style of control to construct | |
125 * @param index the zero-relative index at which to store the receiver in its parent | |
126 * | |
127 * @exception IllegalArgumentException <ul> | |
128 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> | |
129 * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</li> | |
130 * </ul> | |
131 * @exception DWTException <ul> | |
132 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> | |
133 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> | |
134 * </ul> | |
135 * | |
136 * @see DWT#DROP_DOWN | |
137 * @see Widget#checkSubclass | |
138 * @see Widget#getStyle | |
139 */ | |
140 public this (CoolBar parent, int style, int index) { | |
141 super(parent, style); | |
142 itemBounds = new Rectangle(0, 0, 0, 0); | |
143 this.parent = parent; | |
144 parent.createItem (this, index); | |
145 calculateChevronTrim (); | |
146 } | |
147 /** | |
148 * Adds the listener to the collection of listeners that will | |
149 * be notified when the control is selected by the user, by sending it one | |
150 * of the messages defined in the <code>SelectionListener</code> | |
151 * interface. | |
152 * <p> | |
153 * If <code>widgetSelected</code> is called when the mouse is over | |
154 * the drop-down arrow (or 'chevron') portion of the cool item, | |
155 * the event object detail field contains the value <code>DWT.ARROW</code>, | |
156 * and the x and y fields in the event object represent the point at | |
157 * the bottom left of the chevron, where the menu should be popped up. | |
158 * <code>widgetDefaultSelected</code> is not called. | |
159 * </p> | |
160 * | |
161 * @param listener the listener which should be notified when the control is selected by the user | |
162 * | |
163 * @exception IllegalArgumentException <ul> | |
164 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
165 * </ul> | |
166 * @exception DWTException <ul> | |
167 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
168 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
169 * </ul> | |
170 * | |
171 * @see SelectionListener | |
172 * @see #removeSelectionListener | |
173 * @see SelectionEvent | |
174 * | |
175 * @since 2.0 | |
176 */ | |
177 public void addSelectionListener(SelectionListener listener) { | |
178 checkWidget(); | |
179 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); | |
180 TypedListener typedListener = new TypedListener (listener); | |
181 addListener (DWT.Selection,typedListener); | |
182 addListener (DWT.DefaultSelection,typedListener); | |
183 } | |
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184 protected override void checkSubclass () { |
76 | 185 if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS); |
186 } | |
187 /* | |
188 * Find the trim size of the Toolbar widget in the current platform. | |
189 */ | |
190 void calculateChevronTrim () { | |
191 ToolBar tb = new ToolBar (parent, DWT.FLAT); | |
192 ToolItem ti = new ToolItem (tb, DWT.PUSH); | |
193 Image image = new Image (display, 1, 1); | |
194 ti.setImage (image); | |
195 Point size = tb.computeSize (DWT.DEFAULT, DWT.DEFAULT); | |
196 size = parent.fixPoint(size.x, size.y); | |
197 CHEVRON_HORIZONTAL_TRIM = size.x - 1; | |
198 CHEVRON_VERTICAL_TRIM = size.y - 1; | |
199 tb.dispose (); | |
200 ti.dispose (); | |
201 image.dispose (); | |
202 } | |
203 /** | |
204 * Returns the preferred size of the receiver. | |
205 * <p> | |
206 * The <em>preferred size</em> of a <code>CoolItem</code> is the size that | |
207 * it would best be displayed at. The width hint and height hint arguments | |
208 * allow the caller to ask the instance questions such as "Given a particular | |
209 * width, how high does it need to be to show all of the contents?" | |
210 * To indicate that the caller does not wish to constrain a particular | |
211 * dimension, the constant <code>DWT.DEFAULT</code> is passed for the hint. | |
212 * </p> | |
213 * | |
214 * @param wHint the width hint (can be <code>DWT.DEFAULT</code>) | |
215 * @param hHint the height hint (can be <code>DWT.DEFAULT</code>) | |
216 * @return the preferred size | |
217 * | |
218 * @exception DWTException <ul> | |
219 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
220 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
221 * </ul> | |
222 * | |
223 * @see Layout | |
224 * @see #getBounds | |
225 * @see #getSize | |
226 * @see Control#getBorderWidth | |
227 * @see Scrollable#computeTrim | |
228 * @see Scrollable#getClientArea | |
229 */ | |
230 public Point computeSize (int wHint, int hHint) { | |
231 checkWidget(); | |
232 int width = wHint, height = hHint; | |
233 if (wHint is DWT.DEFAULT) width = 32; | |
234 if (hHint is DWT.DEFAULT) height = 32; | |
235 if ((parent.style & DWT.VERTICAL) !is 0) { | |
236 height += MINIMUM_WIDTH; | |
237 } else { | |
238 width += MINIMUM_WIDTH; | |
239 } | |
240 return new Point (width, height); | |
241 } | |
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242 public override void dispose () { |
76 | 243 if (isDisposed()) return; |
244 | |
245 /* | |
246 * Must call parent.destroyItem() before super.dispose(), since it needs to | |
247 * query the bounds to properly remove the item. | |
248 */ | |
249 parent.destroyItem(this); | |
250 super.dispose (); | |
251 parent = null; | |
252 control = null; | |
253 | |
254 /* | |
255 * Although the parent for the chevron is the CoolBar (CoolItem can not be the parent) | |
256 * it has to be disposed with the item | |
257 */ | |
258 if (chevron !is null && !chevron.isDisposed()) chevron.dispose(); | |
259 chevron = null; | |
260 if (arrowImage !is null && !arrowImage.isDisposed()) arrowImage.dispose(); | |
261 arrowImage = null; | |
262 } | |
263 | |
264 Image createArrowImage (int width, int height) { | |
265 Point point = parent.fixPoint(width, height); | |
266 width = point.x; | |
267 height = point.y; | |
268 Color foreground = parent.getForeground (); | |
269 Color black = display.getSystemColor (DWT.COLOR_BLACK); | |
270 Color background = parent.getBackground (); | |
271 | |
272 PaletteData palette = new PaletteData ( [foreground.getRGB(), background.getRGB(), black.getRGB() ] ); | |
273 ImageData imageData = new ImageData (width, height, 4, palette); | |
274 imageData.transparentPixel = 1; | |
275 Image image = new Image (display, imageData); | |
276 | |
240 | 277 GC gc = new GC (image, parent.getStyle() & DWT.RIGHT_TO_LEFT); |
76 | 278 gc.setBackground (background); |
279 gc.fillRectangle (0, 0, width, height); | |
280 gc.setForeground (black); | |
281 | |
282 int startX = 0 ; | |
283 if ((parent.style & DWT.VERTICAL) !is 0) { | |
284 startX = width - CHEVRON_IMAGE_WIDTH; | |
285 } | |
286 int startY = height / 6; | |
287 int step = 2; | |
288 gc.drawLine (startX, startY, startX + step, startY + step); | |
289 gc.drawLine (startX, startY + (2 * step), startX + step, startY + step); | |
290 startX++; | |
291 gc.drawLine (startX, startY, startX + step, startY + step); | |
292 gc.drawLine (startX, startY + (2 * step), startX + step, startY + step); | |
293 startX += 3; | |
294 gc.drawLine (startX, startY, startX + step, startY + step); | |
295 gc.drawLine (startX, startY + (2 * step), startX + step, startY + step); | |
296 startX++; | |
297 gc.drawLine (startX, startY, startX + step, startY + step); | |
298 gc.drawLine (startX, startY + (2 * step), startX + step, startY + step); | |
299 gc.dispose (); | |
300 return image; | |
301 } | |
302 /** | |
303 * Returns a rectangle describing the receiver's size and location | |
304 * relative to its parent. | |
305 * | |
306 * @return the receiver's bounding rectangle | |
307 * | |
308 * @exception DWTException <ul> | |
309 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
310 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
311 * </ul> | |
312 */ | |
313 public Rectangle getBounds () { | |
314 checkWidget(); | |
315 return parent.fixRectangle(itemBounds.x, itemBounds.y, itemBounds.width, itemBounds.height); | |
316 } | |
317 Rectangle internalGetBounds () { | |
318 return new Rectangle(itemBounds.x, itemBounds.y, itemBounds.width, itemBounds.height); | |
319 } | |
320 /** | |
321 * Returns the control that is associated with the receiver. | |
322 * | |
323 * @return the control that is contained by the receiver | |
324 * | |
325 * @exception DWTException <ul> | |
326 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
327 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
328 * </ul> | |
329 */ | |
330 public Control getControl () { | |
331 checkWidget(); | |
332 return control; | |
333 } | |
334 /** | |
335 * Returns the minimum size that the cool item can | |
336 * be resized to using the cool item's gripper. | |
337 * | |
338 * @return a point containing the minimum width and height of the cool item, in pixels | |
339 * | |
340 * @exception DWTException <ul> | |
341 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
342 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
343 * </ul> | |
344 * | |
345 * @since 2.0 | |
346 */ | |
347 public Point getMinimumSize () { | |
348 checkWidget(); | |
349 return parent.fixPoint(minimumWidth, minimumHeight); | |
350 } | |
351 /** | |
352 * Returns the receiver's parent, which must be a <code>CoolBar</code>. | |
353 * | |
354 * @return the receiver's parent | |
355 * | |
356 * @exception DWTException <ul> | |
357 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
358 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
359 * </ul> | |
360 */ | |
361 public CoolBar getParent () { | |
362 checkWidget(); | |
363 return parent; | |
364 } | |
365 /** | |
366 * Returns a point describing the receiver's ideal size. | |
367 * The x coordinate of the result is the ideal width of the receiver. | |
368 * The y coordinate of the result is the ideal height of the receiver. | |
369 * | |
370 * @return the receiver's ideal size | |
371 * | |
372 * @exception DWTException <ul> | |
373 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
374 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
375 * </ul> | |
376 */ | |
377 public Point getPreferredSize () { | |
378 checkWidget(); | |
379 return parent.fixPoint(preferredWidth, preferredHeight); | |
380 } | |
381 /** | |
382 * Returns a point describing the receiver's size. The | |
383 * x coordinate of the result is the width of the receiver. | |
384 * The y coordinate of the result is the height of the | |
385 * receiver. | |
386 * | |
387 * @return the receiver's size | |
388 * | |
389 * @exception DWTException <ul> | |
390 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
391 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
392 * </ul> | |
393 */ | |
394 public Point getSize () { | |
395 checkWidget(); | |
396 return parent.fixPoint(itemBounds.width, itemBounds.height); | |
397 } | |
398 int internalGetMinimumWidth () { | |
399 int width = minimumWidth + MINIMUM_WIDTH; | |
400 if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) { | |
401 width += CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN; | |
402 } | |
403 return width; | |
404 } | |
405 /* | |
406 * Called when the chevron is selected. | |
407 */ | |
408 void onSelection (Event ev) { | |
409 Rectangle bounds = chevron.getBounds(); | |
410 Event event = new Event(); | |
411 event.detail = DWT.ARROW; | |
412 if ((parent.style & DWT.VERTICAL) !is 0) { | |
413 event.x = bounds.x + bounds.width; | |
414 event.y = bounds.y; | |
415 } else { | |
416 event.x = bounds.x; | |
417 event.y = bounds.y + bounds.height; | |
418 } | |
419 postEvent (DWT.Selection, event); | |
420 } | |
421 /** | |
422 * Removes the listener from the collection of listeners that | |
423 * will be notified when the control is selected by the user. | |
424 * | |
425 * @param listener the listener which should no longer be notified | |
426 * | |
427 * @exception IllegalArgumentException <ul> | |
428 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
429 * </ul> | |
430 * @exception DWTException <ul> | |
431 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
432 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
433 * </ul> | |
434 * | |
435 * @see SelectionListener | |
436 * @see #addSelectionListener | |
437 * | |
438 * @since 2.0 | |
439 */ | |
440 public void removeSelectionListener(SelectionListener listener) { | |
441 checkWidget(); | |
442 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); | |
443 if (eventTable is null) return; | |
444 eventTable.unhook (DWT.Selection, listener); | |
445 eventTable.unhook (DWT.DefaultSelection,listener); | |
446 } | |
447 void setBounds (int x, int y, int width, int height) { | |
448 itemBounds.x = x; | |
449 itemBounds.y = y; | |
450 itemBounds.width = width; | |
451 itemBounds.height = height; | |
452 if (control !is null) { | |
453 int controlWidth = width - MINIMUM_WIDTH; | |
454 if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) { | |
455 controlWidth -= CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN; | |
456 } | |
457 control.setBounds (parent.fixRectangle(x + MINIMUM_WIDTH, y, controlWidth, height)); | |
458 } | |
459 updateChevron(); | |
460 } | |
461 /** | |
462 * Sets the control that is associated with the receiver | |
463 * to the argument. | |
464 * | |
465 * @param control the new control that will be contained by the receiver | |
466 * | |
467 * @exception IllegalArgumentException <ul> | |
468 * <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li> | |
469 * <li>ERROR_INVALID_PARENT - if the control is not in the same widget tree</li> | |
470 * </ul> | |
471 * @exception DWTException <ul> | |
472 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
473 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
474 * </ul> | |
475 */ | |
476 public void setControl (Control control) { | |
477 checkWidget(); | |
478 if (control !is null) { | |
479 if (control.isDisposed()) error (DWT.ERROR_INVALID_ARGUMENT); | |
480 if (control.parent !is parent) error (DWT.ERROR_INVALID_PARENT); | |
481 } | |
482 this.control = control; | |
483 if (control !is null) { | |
484 int controlWidth = itemBounds.width - MINIMUM_WIDTH; | |
485 if ((style & DWT.DROP_DOWN) !is 0 && itemBounds.width < preferredWidth) { | |
486 controlWidth -= CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN; | |
487 } | |
488 control.setBounds (parent.fixRectangle(itemBounds.x + MINIMUM_WIDTH, itemBounds.y, controlWidth, itemBounds.height)); | |
489 } | |
490 } | |
491 /** | |
492 * Sets the minimum size that the cool item can be resized to | |
493 * using the cool item's gripper, to the point specified by the arguments. | |
494 * | |
495 * @param width the minimum width of the cool item, in pixels | |
496 * @param height the minimum height of the cool item, in pixels | |
497 * | |
498 * @exception DWTException <ul> | |
499 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
500 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
501 * </ul> | |
502 * | |
503 * @since 2.0 | |
504 */ | |
505 public void setMinimumSize (int width, int height) { | |
506 checkWidget (); | |
507 Point point = parent.fixPoint(width, height); | |
508 minimumWidth = point.x; | |
509 minimumHeight = point.y; | |
510 } | |
511 /** | |
512 * Sets the minimum size that the cool item can be resized to | |
513 * using the cool item's gripper, to the point specified by the argument. | |
514 * | |
515 * @param size a point representing the minimum width and height of the cool item, in pixels | |
516 * | |
517 * @exception IllegalArgumentException <ul> | |
518 * <li>ERROR_NULL_ARGUMENT - if the point is null</li> | |
519 * </ul> | |
520 * @exception DWTException <ul> | |
521 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
522 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
523 * </ul> | |
524 * | |
525 * @since 2.0 | |
526 */ | |
527 public void setMinimumSize (Point size) { | |
528 checkWidget (); | |
529 if (size is null) error(DWT.ERROR_NULL_ARGUMENT); | |
530 setMinimumSize(size.x, size.y); | |
531 } | |
532 /** | |
533 * Sets the receiver's ideal size to the point specified by the arguments. | |
534 * | |
535 * @param width the new ideal width for the receiver | |
536 * @param height the new ideal height for the receiver | |
537 * | |
538 * @exception DWTException <ul> | |
539 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
540 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
541 * </ul> | |
542 */ | |
543 public void setPreferredSize (int width, int height) { | |
544 checkWidget(); | |
545 ideal = true; | |
546 Point point = parent.fixPoint(width, height); | |
547 preferredWidth = Math.max (point.x, MINIMUM_WIDTH); | |
548 preferredHeight = point.y; | |
549 } | |
550 /** | |
551 * Sets the receiver's ideal size to the point specified by the argument. | |
552 * | |
553 * @param size the new ideal size for the receiver | |
554 * | |
555 * @exception IllegalArgumentException <ul> | |
556 * <li>ERROR_NULL_ARGUMENT - if the point is null</li> | |
557 * </ul> | |
558 * @exception DWTException <ul> | |
559 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
560 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
561 * </ul> | |
562 */ | |
563 public void setPreferredSize (Point size) { | |
564 checkWidget(); | |
565 if (size is null) error(DWT.ERROR_NULL_ARGUMENT); | |
566 setPreferredSize(size.x, size.y); | |
567 } | |
568 /** | |
569 * Sets the receiver's size to the point specified by the arguments. | |
570 * <p> | |
571 * Note: Attempting to set the width or height of the | |
572 * receiver to a negative number will cause that | |
573 * value to be set to zero instead. | |
574 * </p> | |
575 * | |
576 * @param width the new width for the receiver | |
577 * @param height the new height for the receiver | |
578 * | |
579 * @exception DWTException <ul> | |
580 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
581 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
582 * </ul> | |
583 */ | |
584 public void setSize (int width, int height) { | |
585 checkWidget(); | |
586 Point point = parent.fixPoint(width, height); | |
587 width = Math.max(point.x, minimumWidth + MINIMUM_WIDTH); | |
588 height = point.y; | |
589 if (!ideal) { | |
590 preferredWidth = width; | |
591 preferredHeight = height; | |
592 } | |
593 itemBounds.width = requestedWidth = width; | |
594 itemBounds.height = height; | |
595 if (control !is null) { | |
596 int controlWidth = width - MINIMUM_WIDTH; | |
597 if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) { | |
598 controlWidth -= CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN; | |
599 } | |
600 control.setSize(parent.fixPoint(controlWidth, height)); | |
601 } | |
602 parent.relayout(); | |
603 updateChevron(); | |
604 } | |
605 /** | |
606 * Sets the receiver's size to the point specified by the argument. | |
607 * <p> | |
608 * Note: Attempting to set the width or height of the | |
609 * receiver to a negative number will cause them to be | |
610 * set to zero instead. | |
611 * </p> | |
612 * | |
613 * @param size the new size for the receiver | |
614 * | |
615 * @exception IllegalArgumentException <ul> | |
616 * <li>ERROR_NULL_ARGUMENT - if the point is null</li> | |
617 * </ul> | |
618 * @exception DWTException <ul> | |
619 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
620 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
621 * </ul> | |
622 */ | |
623 public void setSize (Point size) { | |
624 checkWidget(); | |
625 if (size is null) error (DWT.ERROR_NULL_ARGUMENT); | |
626 setSize (size.x, size.y); | |
627 } | |
628 void updateChevron() { | |
629 if (control !is null) { | |
630 int width = itemBounds.width; | |
631 if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) { | |
632 if (chevron is null) { | |
633 chevron = new ToolBar (parent, DWT.FLAT | DWT.NO_FOCUS); | |
634 ToolItem toolItem = new ToolItem (chevron, DWT.PUSH); | |
635 toolItem.addListener (DWT.Selection, new class () Listener { | |
636 public void handleEvent (Event event) { | |
637 this.outer.onSelection (event); | |
638 } | |
639 }); | |
640 } | |
641 int controlHeight, currentImageHeight = 0; | |
642 if ((parent.style & DWT.VERTICAL) !is 0) { | |
643 controlHeight = control.getSize ().x; | |
644 if (arrowImage !is null) currentImageHeight = arrowImage.getBounds().width; | |
645 } else { | |
646 controlHeight = control.getSize ().y; | |
647 if (arrowImage !is null) currentImageHeight = arrowImage.getBounds().height; | |
648 } | |
649 int height = Math.min (controlHeight, itemBounds.height); | |
650 int imageHeight = Math.max(1, height - CHEVRON_VERTICAL_TRIM); | |
651 if (currentImageHeight !is imageHeight) { | |
652 Image image = createArrowImage (CHEVRON_IMAGE_WIDTH, imageHeight); | |
653 chevron.getItem (0).setImage (image); | |
654 if (arrowImage !is null) arrowImage.dispose (); | |
655 arrowImage = image; | |
656 } | |
657 chevron.setBackground (parent.getBackground()); | |
658 chevron.setBounds (parent.fixRectangle ( | |
659 itemBounds.x + width - CHEVRON_LEFT_MARGIN - CHEVRON_IMAGE_WIDTH - CHEVRON_HORIZONTAL_TRIM, | |
660 itemBounds.y, | |
661 CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM, | |
662 height)); | |
663 chevron.setVisible(true); | |
664 } else { | |
665 if (chevron !is null) { | |
666 chevron.setVisible(false); | |
667 } | |
668 } | |
669 } | |
670 } | |
671 } |