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1
11 package org.eclipse.swt.widgets;
12
13
14 import org.eclipse.swt.internal.win32.*;
15 import org.eclipse.swt.*;
16 import org.eclipse.swt.graphics.*;
17 import org.eclipse.swt.events.*;
18
19
67 public class Slider extends Control {
68 int increment, pageIncrement;
69 boolean ignoreFocus;
70 static final int ScrollBarProc;
71 static final TCHAR ScrollBarClass = new TCHAR (0, "SCROLLBAR", true);
72 static {
73 WNDCLASS lpWndClass = new WNDCLASS ();
74 OS.GetClassInfo (0, ScrollBarClass, lpWndClass);
75 ScrollBarProc = lpWndClass.lpfnWndProc;
76 }
77
78
107 public Slider (Composite parent, int style) {
108 super (parent, checkStyle (style));
109 }
110
111
143 public void addSelectionListener (SelectionListener listener) {
144 checkWidget ();
145 if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
146 TypedListener typedListener = new TypedListener(listener);
147 addListener (SWT.Selection,typedListener);
148 addListener (SWT.DefaultSelection,typedListener);
149 }
150
151 int callWindowProc (int hwnd, int msg, int wParam, int lParam) {
152 if (handle == 0) return 0;
153
161 switch (msg) {
162 case OS.WM_LBUTTONDOWN:
163 case OS.WM_LBUTTONDBLCLK:
164 display.runDeferredEvents ();
165 }
166 return OS.CallWindowProc (ScrollBarProc, hwnd, msg, wParam, lParam);
167 }
168
169 static int checkStyle (int style) {
170 return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0);
171 }
172
173 public Point computeSize (int wHint, int hHint, boolean changed) {
174 checkWidget ();
175 int border = getBorderWidth ();
176 int width = border * 2, height = border * 2;
177 if ((style & SWT.HORIZONTAL) != 0) {
178 width += OS.GetSystemMetrics (OS.SM_CXHSCROLL) * 10;
179 height += OS.GetSystemMetrics (OS.SM_CYHSCROLL);
180 } else {
181 width += OS.GetSystemMetrics (OS.SM_CXVSCROLL);
182 height += OS.GetSystemMetrics (OS.SM_CYVSCROLL) * 10;
183 }
184 if (wHint != SWT.DEFAULT) width = wHint + (border * 2);
185 if (hHint != SWT.DEFAULT) height = hHint + (border * 2);
186 return new Point (width, height);
187 }
188
189 void createWidget () {
190 super.createWidget ();
191 increment = 1;
192 pageIncrement = 10;
193
199 SCROLLINFO info = new SCROLLINFO ();
200 info.cbSize = SCROLLINFO.sizeof;
201 info.fMask = OS.SIF_ALL;
202 info.nMax = 100;
203 info.nPage = 11;
204 OS.SetScrollInfo (handle, OS.SB_CTL, info, true);
205 }
206
207 int defaultBackground () {
208 return OS.GetSysColor (OS.COLOR_SCROLLBAR);
209 }
210
211 int defaultForeground () {
212 return OS.GetSysColor (OS.COLOR_BTNFACE);
213 }
214
215 void enableWidget (boolean enabled) {
216 super.enableWidget (enabled);
217 if (!OS.IsWinCE) {
218 int flags = enabled ? OS.ESB_ENABLE_BOTH : OS.ESB_DISABLE_BOTH;
219 OS.EnableScrollBar (handle, OS.SB_CTL, flags);
220 }
221 if (enabled) {
222 state &= ~DISABLED;
223 } else {
224 state |= DISABLED;
225 }
226 }
227
228 public boolean getEnabled () {
229 checkWidget ();
230 return (state & DISABLED) == 0;
231 }
232
233
245 public int getIncrement () {
246 checkWidget ();
247 return increment;
248 }
249
250
260 public int getMaximum () {
261 checkWidget ();
262 SCROLLINFO info = new SCROLLINFO ();
263 info.cbSize = SCROLLINFO.sizeof;
264 info.fMask = OS.SIF_RANGE;
265 OS.GetScrollInfo (handle, OS.SB_CTL, info);
266 return info.nMax;
267 }
268
269
279 public int getMinimum () {
280 checkWidget ();
281 SCROLLINFO info = new SCROLLINFO ();
282 info.cbSize = SCROLLINFO.sizeof;
283 info.fMask = OS.SIF_RANGE;
284 OS.GetScrollInfo (handle, OS.SB_CTL, info);
285 return info.nMin;
286 }
287
288
300 public int getPageIncrement () {
301 checkWidget ();
302 return pageIncrement;
303 }
304
305
315 public int getSelection () {
316 checkWidget ();
317 SCROLLINFO info = new SCROLLINFO ();
318 info.cbSize = SCROLLINFO.sizeof;
319 info.fMask = OS.SIF_POS;
320 OS.GetScrollInfo (handle, OS.SB_CTL, info);
321 return info.nPos;
322 }
323
324
335 public int getThumb () {
336 checkWidget ();
337 SCROLLINFO info = new SCROLLINFO ();
338 info.cbSize = SCROLLINFO.sizeof;
339 info.fMask = OS.SIF_PAGE;
340 OS.GetScrollInfo (handle, OS.SB_CTL, info);
341 if (info.nPage != 0) --info.nPage;
342 return info.nPage;
343 }
344
345
362 public void removeSelectionListener (SelectionListener listener) {
363 checkWidget ();
364 if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
365 if (eventTable == null) return;
366 eventTable.unhook (SWT.Selection, listener);
367 eventTable.unhook (SWT.DefaultSelection,listener);
368 }
369
370 void setBounds (int x, int y, int width, int height, int flags) {
371 super.setBounds (x, y, width, height, flags);
372
378 if (OS.GetFocus () == handle) {
379 ignoreFocus = true;
380 OS.SendMessage (handle, OS.WM_SETFOCUS, 0, 0);
381 ignoreFocus = false;
382 }
383 }
384
385
398 public void setIncrement (int value) {
399 checkWidget ();
400 if (value < 1) return;
401 increment = value;
402 }
403
404
417 public void setMaximum (int value) {
418 checkWidget ();
419 if (value < 0) return;
420 SCROLLINFO info = new SCROLLINFO ();
421 info.cbSize = SCROLLINFO.sizeof;
422 info.fMask = OS.SIF_RANGE | OS.SIF_DISABLENOSCROLL;
423 OS.GetScrollInfo (handle, OS.SB_CTL, info);
424 if (value - info.nMin - info.nPage < 1) return;
425 info.nMax = value;
426 SetScrollInfo (handle, OS.SB_CTL, info, true);
427 }
428
429
442 public void setMinimum (int value) {
443 checkWidget ();
444 if (value < 0) return;
445 SCROLLINFO info = new SCROLLINFO ();
446 info.cbSize = SCROLLINFO.sizeof;
447 info.fMask = OS.SIF_RANGE | OS.SIF_DISABLENOSCROLL;
448 OS.GetScrollInfo (handle, OS.SB_CTL, info);
449 if (info.nMax - value - info.nPage < 1) return;
450 info.nMin = value;
451 SetScrollInfo (handle, OS.SB_CTL, info, true);
452 }
453
454
467 public void setPageIncrement (int value) {
468 checkWidget ();
469 if (value < 1) return;
470 pageIncrement = value;
471 }
472
473 boolean SetScrollInfo (int hwnd, int flags, SCROLLINFO info, boolean fRedraw) {
474
482 if ((state & DISABLED) != 0) fRedraw = false;
483 boolean result = OS.SetScrollInfo (hwnd, flags, info, fRedraw);
484 if ((state & DISABLED) != 0) {
485 OS.EnableWindow (handle, false);
486 if (!OS.IsWinCE) {
487 OS.EnableScrollBar (handle, OS.SB_CTL, OS.ESB_DISABLE_BOTH);
488 }
489 }
490
491
498 if (OS.GetFocus () == handle) {
499 ignoreFocus = true;
500 OS.SendMessage (handle, OS.WM_SETFOCUS, 0, 0);
501 ignoreFocus = false;
502 }
503 return result;
504 }
505
506
518 public void setSelection (int value) {
519 checkWidget ();
520 SCROLLINFO info = new SCROLLINFO ();
521 info.cbSize = SCROLLINFO.sizeof;
522 info.fMask = OS.SIF_POS;
523 info.nPos = value;
524 SetScrollInfo (handle, OS.SB_CTL, info, true);
525 }
526
527
541 public void setThumb (int value) {
542 checkWidget ();
543 if (value < 1) return;
544 SCROLLINFO info = new SCROLLINFO ();
545 info.cbSize = SCROLLINFO.sizeof;
546 info.fMask = OS.SIF_PAGE | OS.SIF_RANGE | OS.SIF_DISABLENOSCROLL;
547 OS.GetScrollInfo (handle, OS.SB_CTL, info);
548 info.nPage = value;
549 if (info.nPage != 0) info.nPage++;
550 SetScrollInfo (handle, OS.SB_CTL, info, true);
551 }
552
553
574 public void setValues (int selection, int minimum, int maximum, int thumb, int increment, int pageIncrement) {
575 checkWidget ();
576 if (minimum < 0) return;
577 if (maximum < 0) return;
578 if (thumb < 1) return;
579 if (increment < 1) return;
580 if (pageIncrement < 1) return;
581 this.increment = increment;
582 this.pageIncrement = pageIncrement;
583 SCROLLINFO info = new SCROLLINFO ();
584 info.cbSize = SCROLLINFO.sizeof;
585 info.fMask = OS.SIF_POS | OS.SIF_PAGE | OS.SIF_RANGE | OS.SIF_DISABLENOSCROLL;
586 info.nPos = selection;
587 info.nMin = minimum;
588 info.nMax = maximum;
589 info.nPage = thumb;
590 if (info.nPage != 0) info.nPage++;
591 SetScrollInfo (handle, OS.SB_CTL, info, true);
592 }
593
594 int widgetExtStyle () {
595
601 int bits = super.widgetExtStyle ();
602 if ((style & SWT.BORDER) != 0) bits &= ~OS.WS_EX_CLIENTEDGE;
603 return bits;
604 }
605
606 int widgetStyle () {
607 int bits = super.widgetStyle () | OS.WS_TABSTOP;
608
613 if ((style & SWT.BORDER) != 0) bits &= ~OS.WS_BORDER;
614 if ((style & SWT.HORIZONTAL) != 0) return bits | OS.SBS_HORZ;
615 return bits | OS.SBS_VERT;
616 }
617
618 TCHAR windowClass () {
619 return ScrollBarClass;
620 }
621
622 int windowProc () {
623 return ScrollBarProc;
624 }
625
626 LRESULT WM_KEYDOWN (int wParam, int lParam) {
627 LRESULT result = super.WM_KEYDOWN (wParam, lParam);
628 if (result != null) return result;
629 if ((style & SWT.VERTICAL) != 0) return result;
630
639 if ((style & SWT.MIRRORED) != 0) {
640 switch (wParam) {
641 case OS.VK_LEFT:
642 case OS.VK_RIGHT: {
643 int key = wParam == OS.VK_LEFT ? OS.VK_RIGHT : OS.VK_LEFT;
644 int code = callWindowProc (handle, OS.WM_KEYDOWN, key, lParam);
645 return new LRESULT (code);
646 }
647 }
648 }
649 return result;
650 }
651
652 LRESULT WM_LBUTTONDBLCLK (int wParam, int lParam) {
653
661 int oldBits = OS.GetWindowLong (handle, OS.GWL_STYLE);
662 int newBits = oldBits & ~OS.WS_TABSTOP;
663 OS.SetWindowLong (handle, OS.GWL_STYLE, newBits);
664 LRESULT result = super.WM_LBUTTONDBLCLK (wParam, lParam);
665 if (isDisposed ()) return LRESULT.ZERO;
666 OS.SetWindowLong (handle, OS.GWL_STYLE, oldBits);
667 if (result == LRESULT.ZERO) return result;
668
669
676 if (!OS.IsWinCE) {
677 if (OS.GetCapture () == handle) OS.ReleaseCapture ();
678 if (!sendMouseEvent (SWT.MouseUp, 1, handle, OS.WM_LBUTTONUP, wParam, lParam)) {
679 return LRESULT.ZERO;
680 }
681 }
682 return result;
683 }
684
685 LRESULT WM_LBUTTONDOWN (int wParam, int lParam) {
686
694 int oldBits = OS.GetWindowLong (handle, OS.GWL_STYLE);
695 int newBits = oldBits & ~OS.WS_TABSTOP;
696 OS.SetWindowLong (handle, OS.GWL_STYLE, newBits);
697 LRESULT result = super.WM_LBUTTONDOWN (wParam, lParam);
698 if (isDisposed ()) return LRESULT.ZERO;
699 OS.SetWindowLong (handle, OS.GWL_STYLE, oldBits);
700 if (result == LRESULT.ZERO) return result;
701
702
709 if (!OS.IsWinCE) {
710 if (OS.GetCapture () == handle) OS.ReleaseCapture ();
711 if (!sendMouseEvent (SWT.MouseUp, 1, handle, OS.WM_LBUTTONUP, wParam, lParam)) {
712 return LRESULT.ONE;
713 }
714 }
715 return result;
716 }
717
718 LRESULT WM_SETFOCUS (int wParam, int lParam) {
719 if (ignoreFocus) return null;
720 return super.WM_SETFOCUS (wParam, lParam);
721 }
722
723 LRESULT wmScrollChild (int wParam, int lParam) {
724
725
726 int code = wParam & 0xFFFF;
727 if (code == OS.SB_ENDSCROLL) return null;
728
729
730 Event event = new Event ();
731 SCROLLINFO info = new SCROLLINFO ();
732 info.cbSize = SCROLLINFO.sizeof;
733 info.fMask = OS.SIF_TRACKPOS | OS.SIF_POS | OS.SIF_RANGE;
734 OS.GetScrollInfo (handle, OS.SB_CTL, info);
735 info.fMask = OS.SIF_POS;
736 switch (code) {
737 case OS.SB_THUMBPOSITION:
738 event.detail = SWT.NONE;
739 info.nPos = info.nTrackPos;
740 break;
741 case OS.SB_THUMBTRACK:
742 event.detail = SWT.DRAG;
743 info.nPos = info.nTrackPos;
744 break;
745 case OS.SB_TOP:
746 event.detail = SWT.HOME;
747 info.nPos = info.nMin;
748 break;
749 case OS.SB_BOTTOM:
750 event.detail = SWT.END;
751 info.nPos = info.nMax;
752 break;
753 case OS.SB_LINEDOWN:
754 event.detail = SWT.ARROW_DOWN;
755 info.nPos += increment;
756 break;
757 case OS.SB_LINEUP:
758 event.detail = SWT.ARROW_UP;
759 info.nPos = Math.max (info.nMin, info.nPos - increment);
760 break;
761 case OS.SB_PAGEDOWN:
762 event.detail = SWT.PAGE_DOWN;
763 info.nPos += pageIncrement;
764 break;
765 case OS.SB_PAGEUP:
766 event.detail = SWT.PAGE_UP;
767 info.nPos = Math.max (info.nMin, info.nPos - pageIncrement);
768 break;
769 }
770 OS.SetScrollInfo (handle, OS.SB_CTL, info, true);
771
772
779 sendEvent (SWT.Selection, event);
780 return null;
782 }
783
784 }
785 |
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