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author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Sat, 09 Aug 2008 17:00:02 +0200
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-1:000000000000 0:380af2bdd8e5
1 /*******************************************************************************
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
10 *******************************************************************************/
11 module dwt.widgets.Spinner;
12
13 import dwt.dwthelper.utils;
14
15 import dwt.DWT;
16 import dwt.DWTException;
17 import dwt.events.ModifyListener;
18 import dwt.events.SelectionEvent;
19 import dwt.events.SelectionListener;
20 import dwt.events.VerifyListener;
21 import dwt.graphics.Point;
22 import dwt.graphics.Rectangle;
23 import dwt.internal.cocoa.NSAttributedString;
24 import dwt.internal.cocoa.NSCell;
25 import dwt.internal.cocoa.NSMutableDictionary;
26 import dwt.internal.cocoa.NSRect;
27 import dwt.internal.cocoa.NSSize;
28 import dwt.internal.cocoa.NSStepper;
29 import dwt.internal.cocoa.NSString;
30 import dwt.internal.cocoa.NSTextField;
31 import dwt.internal.cocoa.OS;
32 import dwt.internal.cocoa.SWTStepper;
33 import dwt.internal.cocoa.SWTTextField;
34 import dwt.internal.cocoa.SWTView;
35
36 /**
37 * Instances of this class are selectable user interface
38 * objects that allow the user to enter and modify numeric
39 * values.
40 * <p>
41 * Note that although this class is a subclass of <code>Composite</code>,
42 * it does not make sense to add children to it, or set a layout on it.
43 * </p><p>
44 * <dl>
45 * <dt><b>Styles:</b></dt>
46 * <dd>READ_ONLY, WRAP</dd>
47 * <dt><b>Events:</b></dt>
48 * <dd>Selection, Modify, Verify</dd>
49 * </dl>
50 * </p><p>
51 * IMPORTANT: This class is <em>not</em> intended to be subclassed.
52 * </p>
53 *
54 * @since 3.1
55 */
56 public class Spinner extends Composite {
57 NSTextField textView;
58 NSStepper buttonView;
59 int pageIncrement = 10;
60 int digits = 0;
61
62 static int GAP = 0;
63
64 /**
65 * Constructs a new instance of this class given its parent
66 * and a style value describing its behavior and appearance.
67 * <p>
68 * The style value is either one of the style constants defined in
69 * class <code>DWT</code> which is applicable to instances of this
70 * class, or must be built by <em>bitwise OR</em>'ing together
71 * (that is, using the <code>int</code> "|" operator) two or more
72 * of those <code>DWT</code> style constants. The class description
73 * lists the style constants that are applicable to the class.
74 * Style bits are also inherited from superclasses.
75 * </p>
76 *
77 * @param parent a composite control which will be the parent of the new instance (cannot be null)
78 * @param style the style of control to construct
79 *
80 * @exception IllegalArgumentException <ul>
81 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
82 * </ul>
83 * @exception DWTException <ul>
84 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
85 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
86 * </ul>
87 *
88 * @see DWT#READ_ONLY
89 * @see DWT#WRAP
90 * @see Widget#checkSubclass
91 * @see Widget#getStyle
92 */
93 public Spinner (Composite parent, int style) {
94 super (parent, checkStyle (style));
95 }
96
97 /**
98 * Adds the listener to the collection of listeners who will
99 * be notified when the receiver's text is modified, by sending
100 * it one of the messages defined in the <code>ModifyListener</code>
101 * interface.
102 *
103 * @param listener the listener which should be notified
104 *
105 * @exception IllegalArgumentException <ul>
106 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
107 * </ul>
108 * @exception DWTException <ul>
109 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
110 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
111 * </ul>
112 *
113 * @see ModifyListener
114 * @see #removeModifyListener
115 */
116 public void addModifyListener (ModifyListener listener) {
117 checkWidget ();
118 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
119 TypedListener typedListener = new TypedListener (listener);
120 addListener (DWT.Modify, typedListener);
121 }
122
123 /**
124 * Adds the listener to the collection of listeners who will
125 * be notified when the control is selected by the user, by sending
126 * it one of the messages defined in the <code>SelectionListener</code>
127 * interface.
128 * <p>
129 * <code>widgetSelected</code> is not called for texts.
130 * <code>widgetDefaultSelected</code> is typically called when ENTER is pressed in a single-line text.
131 * </p>
132 *
133 * @param listener the listener which should be notified when the control is selected by the user
134 *
135 * @exception IllegalArgumentException <ul>
136 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
137 * </ul>
138 * @exception DWTException <ul>
139 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
140 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
141 * </ul>
142 *
143 * @see SelectionListener
144 * @see #removeSelectionListener
145 * @see SelectionEvent
146 */
147 public void addSelectionListener(SelectionListener listener) {
148 checkWidget ();
149 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
150 TypedListener typedListener = new TypedListener(listener);
151 addListener (DWT.Selection,typedListener);
152 addListener (DWT.DefaultSelection,typedListener);
153 }
154
155 /**
156 * Adds the listener to the collection of listeners who will
157 * be notified when the receiver's text is verified, by sending
158 * it one of the messages defined in the <code>VerifyListener</code>
159 * interface.
160 *
161 * @param listener the listener which should be notified
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 VerifyListener
172 * @see #removeVerifyListener
173 */
174 void addVerifyListener (VerifyListener listener) {
175 checkWidget();
176 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
177 TypedListener typedListener = new TypedListener (listener);
178 addListener (DWT.Verify, typedListener);
179 }
180
181 static int checkStyle (int style) {
182 /*
183 * Even though it is legal to create this widget
184 * with scroll bars, they serve no useful purpose
185 * because they do not automatically scroll the
186 * widget's client area. The fix is to clear
187 * the DWT style.
188 */
189 return style & ~(DWT.H_SCROLL | DWT.V_SCROLL);
190 }
191
192 protected void checkSubclass () {
193 if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
194 }
195
196 public Point computeSize (int wHint, int hHint, bool changed) {
197 checkWidget ();
198 float width = 0, height = 0;
199 String string = Double.toString (buttonView.maxValue ());
200 NSMutableDictionary dict = NSMutableDictionary.dictionaryWithCapacity (1);
201 dict.setObject(textView.font (), OS.NSFontAttributeName ());
202 int length = string.length ();
203 char [] chars = new char [length];
204 string.getChars (0, length, chars, 0);
205 NSString nsString = NSString.stringWithCharacters (chars, length);
206 NSAttributedString str = ((NSAttributedString) new NSAttributedString ().alloc ()).initWithString_attributes_ (nsString, dict);
207 NSSize size = str.size ();
208 str.release ();
209 width = size.width;
210 height = size.height;
211 NSRect frameRect = textView.frame();
212 NSCell cell = new NSCell (textView.cell ());
213 NSRect cellRect = cell.drawingRectForBounds(frameRect);
214 width += frameRect.width - cellRect.width;
215 height += frameRect.height - cellRect.height;
216 width += GAP;
217 NSRect oldRect = buttonView.frame ();
218 buttonView.sizeToFit();
219 NSRect newRect = buttonView.frame ();
220 buttonView.setFrame (oldRect);
221 width += newRect.width;
222 height = Math.max (height, newRect.height);
223 if (wHint !is DWT.DEFAULT) width = wHint;
224 if (hHint !is DWT.DEFAULT) height = hHint;
225 Rectangle trim = computeTrim (0, 0, (int) width, (int) height);
226 return new Point (trim.width, trim.height);
227 }
228
229 /**
230 * Copies the selected text.
231 * <p>
232 * The current selection is copied to the clipboard.
233 * </p>
234 *
235 * @exception DWTException <ul>
236 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
237 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
238 * </ul>
239 */
240 public void copy () {
241 checkWidget ();
242 // short [] selection = new short [2];
243 // if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextSelectionTag, 4, selection, null) !is OS.noErr) return;
244 // if (selection [0] is selection [1]) return;
245 // int [] actualSize = new int [1];
246 // int [] ptr = new int [1];
247 // if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextCFStringTag, 4, ptr, actualSize) !is OS.noErr) return;
248 // CFRange range = new CFRange ();
249 // range.location = selection [0];
250 // range.length = selection [1] - selection [0];
251 // char [] buffer= new char [range.length];
252 // OS.CFStringGetCharacters (ptr [0], range, buffer);
253 // OS.CFRelease (ptr [0]);
254 // copyToClipboard (buffer);
255 }
256
257 void createHandle () {
258 SWTView widget = (SWTView)new SWTView().alloc();
259 widget.initWithFrame(new NSRect());
260 // widget.setDrawsBackground(false);
261 widget.setTag(jniRef);
262 NSStepper buttonWidget = (NSStepper)new SWTStepper().alloc();
263 buttonWidget.initWithFrame(new NSRect());
264 buttonWidget.setValueWraps((style & DWT.WRAP) !is 0);
265 buttonWidget.setTarget(buttonWidget);
266 buttonWidget.setAction(OS.sel_sendSelection);
267 buttonWidget.setTag(jniRef);
268 NSTextField textWidget = (NSTextField)new SWTTextField().alloc();
269 textWidget.initWithFrame(new NSRect());
270 // textWidget.setTarget(widget);
271 textWidget.setTag(jniRef);
272 textWidget.setEditable((style & DWT.READ_ONLY) is 0);
273 widget.addSubview_(textWidget);
274 widget.addSubview_(buttonWidget);
275 buttonView = buttonWidget;
276 textView = textWidget;
277 view = widget;
278 parent.contentView().addSubview_(widget);
279 setSelection (0, false, true, false);
280 }
281
282 /**
283 * Cuts the selected text.
284 * <p>
285 * The current selection is first copied to the
286 * clipboard and then deleted from the widget.
287 * </p>
288 *
289 * @exception DWTException <ul>
290 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
291 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
292 * </ul>
293 */
294 public void cut () {
295 checkWidget ();
296 if ((style & DWT.READ_ONLY) !is 0) return;
297 // short [] selection = new short [2];
298 // if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextSelectionTag, 4, selection, null) !is OS.noErr) return;
299 // if (selection [0] is selection [1]) return;
300 // char [] buffer = setText ("", selection [0], selection [1], true);
301 // if (buffer !is null) {
302 // copyToClipboard (buffer);
303 // }
304 }
305
306 void enableWidget (bool enabled) {
307 buttonView.setEnabled(enabled);
308 textView.setEnabled(enabled);
309 }
310
311 /**
312 * Returns the number of decimal places used by the receiver.
313 *
314 * @return the digits
315 *
316 * @exception DWTException <ul>
317 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
318 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
319 * </ul>
320 */
321 public int getDigits () {
322 checkWidget ();
323 return digits;
324 }
325
326 /**
327 * Returns the amount that the receiver's value will be
328 * modified by when the up/down arrows are pressed.
329 *
330 * @return the increment
331 *
332 * @exception DWTException <ul>
333 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
334 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
335 * </ul>
336 */
337 public int getIncrement () {
338 checkWidget ();
339 return (int)buttonView.increment();
340 }
341
342 /**
343 * Returns the maximum value which the receiver will allow.
344 *
345 * @return the maximum
346 *
347 * @exception DWTException <ul>
348 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
349 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
350 * </ul>
351 */
352 public int getMaximum () {
353 checkWidget ();
354 return (int)buttonView.maxValue();
355 }
356
357 /**
358 * Returns the minimum value which the receiver will allow.
359 *
360 * @return the minimum
361 *
362 * @exception DWTException <ul>
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 int getMinimum () {
368 checkWidget ();
369 return (int)buttonView.minValue();
370 }
371
372 /**
373 * Returns the amount that the receiver's position will be
374 * modified by when the page up/down keys are pressed.
375 *
376 * @return the page increment
377 *
378 * @exception DWTException <ul>
379 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
380 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
381 * </ul>
382 */
383 public int getPageIncrement () {
384 checkWidget ();
385 return pageIncrement;
386 }
387
388 /**
389 * Returns the <em>selection</em>, which is the receiver's position.
390 *
391 * @return the selection
392 *
393 * @exception DWTException <ul>
394 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
395 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
396 * </ul>
397 */
398 public int getSelection () {
399 checkWidget ();
400 return (int)((NSStepper)buttonView).doubleValue();
401 }
402
403 int getSelectionText () {
404 return -1;
405 }
406
407 /**
408 * Pastes text from clipboard.
409 * <p>
410 * The selected text is deleted from the widget
411 * and new text inserted from the clipboard.
412 * </p>
413 *
414 * @exception DWTException <ul>
415 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
416 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
417 * </ul>
418 */
419 public void paste () {
420 checkWidget ();
421 if ((style & DWT.READ_ONLY) !is 0) return;
422 // String text = getClipboardText ();
423 // short [] selection = new short [2];
424 // if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextSelectionTag, 4, selection, null) !is OS.noErr) return;
425 // setText (text, selection [0], selection [1], true);
426 }
427
428 void releaseHandle () {
429 super.releaseHandle();
430 if (buttonView !is null) {
431 buttonView.setTag(-1);
432 buttonView.release();
433 }
434 if (textView !is null) {
435 textView.setTag(-1);
436 textView.release();
437 }
438 buttonView = null;
439 textView = null;
440 }
441
442 /**
443 * Removes the listener from the collection of listeners who will
444 * be notified when the receiver's text is modified.
445 *
446 * @param listener the listener which should no longer be notified
447 *
448 * @exception IllegalArgumentException <ul>
449 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
450 * </ul>
451 * @exception DWTException <ul>
452 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
453 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
454 * </ul>
455 *
456 * @see ModifyListener
457 * @see #addModifyListener
458 */
459 public void removeModifyListener (ModifyListener listener) {
460 checkWidget ();
461 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
462 if (eventTable is null) return;
463 eventTable.unhook (DWT.Modify, listener);
464 }
465
466 /**
467 * Removes the listener from the collection of listeners who will
468 * be notified when the control is selected by the user.
469 *
470 * @param listener the listener which should no longer be notified
471 *
472 * @exception IllegalArgumentException <ul>
473 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
474 * </ul>
475 * @exception DWTException <ul>
476 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
477 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
478 * </ul>
479 *
480 * @see SelectionListener
481 * @see #addSelectionListener
482 */
483 public void removeSelectionListener(SelectionListener listener) {
484 checkWidget ();
485 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
486 if (eventTable is null) return;
487 eventTable.unhook (DWT.Selection, listener);
488 eventTable.unhook (DWT.DefaultSelection,listener);
489 }
490
491 /**
492 * Removes the listener from the collection of listeners who will
493 * be notified when the control is verified.
494 *
495 * @param listener the listener which should be notified
496 *
497 * @exception IllegalArgumentException <ul>
498 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
499 * </ul>
500 * @exception DWTException <ul>
501 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
502 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
503 * </ul>
504 *
505 * @see VerifyListener
506 * @see #addVerifyListener
507 */
508 void removeVerifyListener (VerifyListener listener) {
509 checkWidget ();
510 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
511 if (eventTable is null) return;
512 eventTable.unhook (DWT.Verify, listener);
513 }
514
515 void sendSelection () {
516 setSelection (getSelection(), false, true, true);
517 }
518
519 int setBounds (int x, int y, int width, int height, bool move, bool resize) {
520 int result = super.setBounds(x, y, width, height, move, resize);
521 if ((result & RESIZED) !is 0) {
522 buttonView.sizeToFit();
523 NSRect buttonFrame = buttonView.bounds();
524 NSRect frame = view.frame();
525 buttonFrame.x = frame.width - buttonFrame.width;
526 buttonFrame.y = 0;
527 frame.x = 0;
528 frame.y = 0;
529 frame.width -= buttonFrame.width + GAP;
530 textView.setFrame(frame);
531 buttonView.setFrame(buttonFrame);
532 }
533 return result;
534 }
535
536 /**
537 * Sets the number of decimal places used by the receiver.
538 * <p>
539 * The digit setting is used to allow for floating point values in the receiver.
540 * For example, to set the selection to a floating point value of 1.37 call setDigits() with
541 * a value of 2 and setSelection() with a value of 137. Similarly, if getDigits() has a value
542 * of 2 and getSelection() returns 137 this should be interpreted as 1.37. This applies to all
543 * numeric APIs.
544 * </p>
545 *
546 * @param value the new digits (must be greater than or equal to zero)
547 *
548 * @exception IllegalArgumentException <ul>
549 * <li>ERROR_INVALID_ARGUMENT - if the value is less than zero</li>
550 * </ul>
551 * @exception DWTException <ul>
552 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
553 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
554 * </ul>
555 */
556 public void setDigits (int value) {
557 checkWidget ();
558 if (value < 0) error (DWT.ERROR_INVALID_ARGUMENT);
559 // if (value is digits) return;
560 // digits = value;
561 // int pos = OS.GetControl32BitValue (buttonHandle);
562 // setSelection (pos, false, true, false);
563 }
564
565 /**
566 * Sets the amount that the receiver's value will be
567 * modified by when the up/down arrows are pressed to
568 * the argument, which must be at least one.
569 *
570 * @param value the new increment (must be greater than zero)
571 *
572 * @exception DWTException <ul>
573 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
574 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
575 * </ul>
576 */
577 public void setIncrement (int value) {
578 checkWidget ();
579 if (value < 1) return;
580 buttonView.setIncrement(value);
581 }
582
583 /**
584 * Sets the maximum value that the receiver will allow. This new
585 * value will be ignored if it is not greater than the receiver's current
586 * minimum value. If the new maximum is applied then the receiver's
587 * selection value will be adjusted if necessary to fall within its new range.
588 *
589 * @param value the new maximum, which must be greater than the current minimum
590 *
591 * @exception DWTException <ul>
592 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
593 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
594 * </ul>
595 */
596 public void setMaximum (int value) {
597 checkWidget ();
598 if (value < 0) return;
599 int min = getMinimum ();
600 if (value <= min) return;
601 int pos = getSelection();
602 buttonView.setMaxValue(value);
603 if (pos > value) setSelection (value, true, true, false);
604 }
605
606 /**
607 * Sets the minimum value that the receiver will allow. This new
608 * value will be ignored if it is negative or is not less than the receiver's
609 * current maximum value. If the new minimum is applied then the receiver's
610 * selection value will be adjusted if necessary to fall within its new range.
611 *
612 * @param value the new minimum, which must be nonnegative and less than the current maximum
613 *
614 * @exception DWTException <ul>
615 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
616 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
617 * </ul>
618 */
619 public void setMinimum (int value) {
620 checkWidget ();
621 if (value < 0) return;
622 int max = getMaximum();
623 if (value >= max) return;
624 int pos = getSelection();
625 buttonView.setMinValue(value);
626 if (pos < value) setSelection (value, true, true, false);
627 }
628
629 /**
630 * Sets the amount that the receiver's position will be
631 * modified by when the page up/down keys are pressed
632 * to the argument, which must be at least one.
633 *
634 * @param value the page increment (must be greater than zero)
635 *
636 * @exception DWTException <ul>
637 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
638 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
639 * </ul>
640 */
641 public void setPageIncrement (int value) {
642 checkWidget ();
643 if (value < 1) return;
644 pageIncrement = value;
645 }
646
647 /**
648 * Sets the <em>selection</em>, which is the receiver's
649 * position, to the argument. If the argument is not within
650 * the range specified by minimum and maximum, it will be
651 * adjusted to fall within this range.
652 *
653 * @param value the new selection (must be zero or greater)
654 *
655 * @exception DWTException <ul>
656 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
657 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
658 * </ul>
659 */
660 public void setSelection (int value) {
661 checkWidget ();
662 int min = getMinimum();
663 int max = getMaximum();
664 value = Math.min (Math.max (min, value), max);
665 setSelection (value, true, true, false);
666 }
667
668 void setSelection (int value, bool setPos, bool setText, bool notify) {
669 if (setPos) {
670 ((NSStepper)buttonView).setDoubleValue(value);
671 }
672 if (setText) {
673 String string = String.valueOf (value);
674 if (digits > 0) {
675 String decimalSeparator = ".";//getDecimalSeparator ();
676 int index = string.length () - digits;
677 StringBuffer buffer = new StringBuffer ();
678 if (index > 0) {
679 buffer.append (string.substring (0, index));
680 buffer.append (decimalSeparator);
681 buffer.append (string.substring (index));
682 } else {
683 buffer.append ("0");
684 buffer.append (decimalSeparator);
685 while (index++ < 0) buffer.append ("0");
686 buffer.append (string);
687 }
688 string = buffer.toString ();
689 }
690 NSCell cell = new NSCell(textView.cell());
691 if (hooks (DWT.Verify) || filters (DWT.Verify)) {
692 int length = cell.title().length();
693 string = verifyText (string, 0, length, null);
694 if (string is null) return;
695 }
696 cell.setTitle(NSString.stringWith(string));
697 // short [] selection = new short [] {0, (short)string.length ()};
698 // OS.SetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextSelectionTag, 4, selection);
699 sendEvent (DWT.Modify);
700 }
701 if (notify) postEvent (DWT.Selection);
702 }
703
704 /**
705 * Sets the receiver's selection, minimum value, maximum
706 * value, digits, increment and page increment all at once.
707 * <p>
708 * Note: This is similar to setting the values individually
709 * using the appropriate methods, but may be implemented in a
710 * more efficient fashion on some platforms.
711 * </p>
712 *
713 * @param selection the new selection value
714 * @param minimum the new minimum value
715 * @param maximum the new maximum value
716 * @param digits the new digits value
717 * @param increment the new increment value
718 * @param pageIncrement the new pageIncrement value
719 *
720 * @exception DWTException <ul>
721 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
722 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
723 * </ul>
724 *
725 * @since 3.2
726 */
727 public void setValues (int selection, int minimum, int maximum, int digits, int increment, int pageIncrement) {
728 checkWidget ();
729 if (minimum < 0) return;
730 if (maximum <= minimum) return;
731 if (digits < 0) return;
732 if (increment < 1) return;
733 if (pageIncrement < 1) return;
734 selection = Math.min (Math.max (minimum, selection), maximum);
735 this.pageIncrement = pageIncrement;
736 this.digits = digits;
737 buttonView.setIncrement(increment);
738 buttonView.setMaxValue(maximum);
739 buttonView.setMinValue(minimum);
740 setSelection (selection, true, true, false);
741 }
742
743 String verifyText (String string, int start, int end, Event keyEvent) {
744 Event event = new Event ();
745 event.text = string;
746 event.start = start;
747 event.end = end;
748 if (keyEvent !is null) {
749 event.character = keyEvent.character;
750 event.keyCode = keyEvent.keyCode;
751 event.stateMask = keyEvent.stateMask;
752 }
753 int index = 0;
754 if (digits > 0) {
755 String decimalSeparator = ".";//getDecimalSeparator ();
756 index = string.indexOf (decimalSeparator);
757 if (index !is -1) {
758 string = string.substring (0, index) + string.substring (index + 1);
759 }
760 index = 0;
761 }
762 while (index < string.length ()) {
763 if (!Character.isDigit (string.charAt (index))) break;
764 index++;
765 }
766 event.doit = index is string.length ();
767 /*
768 * It is possible (but unlikely), that application
769 * code could have disposed the widget in the verify
770 * event. If this happens, answer null to cancel
771 * the operation.
772 */
773 sendEvent (DWT.Verify, event);
774 if (!event.doit || isDisposed ()) return null;
775 return event.text;
776 }
777
778 }