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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
18
40 public class Label extends Control {
41 String  text = "";
42 Image image;
43 static final int MARGIN = 4;
44 static final boolean IMAGE_AND_TEXT = false;
45 static final int LabelProc;
46 static final TCHAR LabelClass = new TCHAR (0, "STATIC", true);
47 static {
48 WNDCLASS lpWndClass = new WNDCLASS ();
49 OS.GetClassInfo (0, LabelClass, lpWndClass);
50 LabelProc = lpWndClass.lpfnWndProc;
51 }
52
53
90 public Label (Composite parent, int style) {
91 super (parent, checkStyle (style));
92 }
93
94 int callWindowProc (int hwnd, int msg, int wParam, int lParam) {
95 if (handle == 0) return 0;
96 return OS.CallWindowProc (LabelProc, hwnd, msg, wParam, lParam);
97 }
98
99 static int checkStyle (int style) {
100 style |= SWT.NO_FOCUS;
101 if ((style & SWT.SEPARATOR) != 0) {
102 style = checkBits (style, SWT.VERTICAL, SWT.HORIZONTAL, 0, 0, 0, 0);
103 return checkBits (style, SWT.SHADOW_OUT, SWT.SHADOW_IN, SWT.SHADOW_NONE, 0, 0, 0);
104 }
105 return checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0);
106 }
107
108 public Point computeSize (int wHint, int hHint, boolean changed) {
109 checkWidget ();
110 int width = 0, height = 0, border = getBorderWidth ();
111 if ((style & SWT.SEPARATOR) != 0) {
112 int lineWidth = OS.GetSystemMetrics (OS.SM_CXBORDER);
113 if ((style & SWT.HORIZONTAL) != 0) {
114 width = DEFAULT_WIDTH; height = lineWidth * 2;
115 } else {
116 width = lineWidth * 2; height = DEFAULT_HEIGHT;
117 }
118 if (wHint != SWT.DEFAULT) width = wHint;
119 if (hHint != SWT.DEFAULT) height = hHint;
120 width += border * 2; height += border * 2;
121 return new Point (width, height);
122 }
123 int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
124 boolean drawText = true;
125 boolean drawImage = (bits & OS.SS_OWNERDRAW) == OS.SS_OWNERDRAW;
126 if (drawImage) {
127 if (image != null) {
128 Rectangle rect = image.getBounds();
129 width += rect.width;
130 height += rect.height;
131 if (IMAGE_AND_TEXT) {
132 if (text.length () != 0) width += MARGIN;
133 } else {
134 drawText = false;
135 }
136 }
137 }
138 if (drawText) {
139 int hDC = OS.GetDC (handle);
140 int newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0);
141 int oldFont = OS.SelectObject (hDC, newFont);
142 int length = OS.GetWindowTextLength (handle);
143 if (length == 0) {
144 TEXTMETRIC tm = OS.IsUnicode ? (TEXTMETRIC) new TEXTMETRICW () : new TEXTMETRICA ();
145 OS.GetTextMetrics (hDC, tm);
146 height = Math.max (height, tm.tmHeight);
147 } else {
148 RECT rect = new RECT ();
149 int flags = OS.DT_CALCRECT | OS.DT_EDITCONTROL | OS.DT_EXPANDTABS;
150 if ((style & SWT.WRAP) != 0 && wHint != SWT.DEFAULT) {
151 flags |= OS.DT_WORDBREAK;
152 rect.right = Math.max (0, wHint - width);
153 }
154 TCHAR buffer = new TCHAR (getCodePage (), length + 1);
155 OS.GetWindowText (handle, buffer, length + 1);
156 OS.DrawText (hDC, buffer, length, rect, flags);
157 width += rect.right - rect.left;
158 height = Math.max (height, rect.bottom - rect.top);
159 }
160 if (newFont != 0) OS.SelectObject (hDC, oldFont);
161 OS.ReleaseDC (handle, hDC);
162 }
163 if (wHint != SWT.DEFAULT) width = wHint;
164 if (hHint != SWT.DEFAULT) height = hHint;
165 width += border * 2;
166 height += border * 2;
167
173 if (OS.IsWinCE && !drawImage) width += 2;
174 return new Point (width, height);
175 }
176
177 void createHandle () {
178 super.createHandle ();
179 state |= THEME_BACKGROUND;
180 }
181
182
196 public int getAlignment () {
197 checkWidget ();
198 if ((style & SWT.SEPARATOR) != 0) return 0;
199 if ((style & SWT.LEFT) != 0) return SWT.LEFT;
200 if ((style & SWT.CENTER) != 0) return SWT.CENTER;
201 if ((style & SWT.RIGHT) != 0) return SWT.RIGHT;
202 return SWT.LEFT;
203 }
204
205
216 public Image getImage () {
217 checkWidget ();
218 return image;
219 }
220
221 String getNameText () {
222 return getText ();
223 }
224
225
237 public String getText () {
238 checkWidget ();
239 if ((style & SWT.SEPARATOR) != 0) return "";
240 return text;
241 }
242
243 boolean mnemonicHit (char key) {
244 Composite control = this.parent;
245 while (control != null) {
246 Control [] children = control._getChildren ();
247 int index = 0;
248 while (index < children.length) {
249 if (children [index] == this) break;
250 index++;
251 }
252 index++;
253 if (index < children.length) {
254 if (children [index].setFocus ()) return true;
255 }
256 control = control.parent;
257 }
258 return false;
259 }
260
261 boolean mnemonicMatch (char key) {
262 char mnemonic = findMnemonic (getText ());
263 if (mnemonic == '\0') return false;
264 return Character.toUpperCase (key) == Character.toUpperCase (mnemonic);
265 }
266
267 void releaseWidget () {
268 super.releaseWidget ();
269 text = null;
270 image = null;
271 }
272
273
286 public void setAlignment (int alignment) {
287 checkWidget ();
288 if ((style & SWT.SEPARATOR) != 0) return;
289 if ((alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) == 0) return;
290 style &= ~(SWT.LEFT | SWT.RIGHT | SWT.CENTER);
291 style |= alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER);
292 int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
293 if ((bits & OS.SS_OWNERDRAW) != OS.SS_OWNERDRAW) {
294 bits &= ~(OS.SS_LEFTNOWORDWRAP | OS.SS_CENTER | OS.SS_RIGHT);
295 if ((style & SWT.LEFT) != 0) {
296 if ((style & SWT.WRAP) != 0) {
297 bits |= OS.SS_LEFT;
298 } else {
299 bits |= OS.SS_LEFTNOWORDWRAP;
300 }
301 }
302 if ((style & SWT.CENTER) != 0) bits |= OS.SS_CENTER;
303 if ((style & SWT.RIGHT) != 0) bits |= OS.SS_RIGHT;
304 OS.SetWindowLong (handle, OS.GWL_STYLE, bits);
305 }
306 OS.InvalidateRect (handle, null, true);
307 }
308
309
323 public void setImage (Image image) {
324 checkWidget ();
325 if ((style & SWT.SEPARATOR) != 0) return;
326 if (image != null && image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
327 this.image = image;
328 int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
329 if ((bits & OS.SS_OWNERDRAW) != OS.SS_OWNERDRAW) {
330 bits &= ~(OS.SS_LEFTNOWORDWRAP | OS.SS_CENTER | OS.SS_RIGHT);
331 bits |= OS.SS_OWNERDRAW;
332 OS.SetWindowLong (handle, OS.GWL_STYLE, bits);
333 }
334 OS.InvalidateRect (handle, null, true);
335 }
336
337
364 public void setText (String string) {
365 checkWidget ();
366 if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
367 if ((style & SWT.SEPARATOR) != 0) return;
368
374 if (string.equals (text)) return;
375 text = string;
376 if (image == null || !IMAGE_AND_TEXT) {
377 int oldBits = OS.GetWindowLong (handle, OS.GWL_STYLE), newBits = oldBits;
378 newBits &= ~OS.SS_OWNERDRAW;
379 if ((style & SWT.LEFT) != 0) {
380 if ((style & SWT.WRAP) != 0) {
381 newBits |= OS.SS_LEFT;
382 } else {
383 newBits |= OS.SS_LEFTNOWORDWRAP;
384 }
385 }
386 if ((style & SWT.CENTER) != 0) newBits |= OS.SS_CENTER;
387 if ((style & SWT.RIGHT) != 0) newBits |= OS.SS_RIGHT;
388 if (oldBits != newBits) OS.SetWindowLong (handle, OS.GWL_STYLE, newBits);
389 }
390 string = Display.withCrLf (string);
391 TCHAR buffer = new TCHAR (getCodePage (), string, true);
392 OS.SetWindowText (handle, buffer);
393
401 if (OS.COMCTL32_MAJOR < 6 || !OS.IsAppThemed ()) {
402 if (findImageControl () != null) OS.InvalidateRect (handle, null, true);
403 }
404 }
405
406 int widgetExtStyle () {
407 int bits = super.widgetExtStyle () & ~OS.WS_EX_CLIENTEDGE;
408 if ((style & SWT.BORDER) != 0) return bits | OS.WS_EX_STATICEDGE;
409 return bits;
410 }
411
412 int widgetStyle () {
413 int bits = super.widgetStyle () | OS.SS_NOTIFY;
414 if ((style & SWT.SEPARATOR) != 0) return bits | OS.SS_OWNERDRAW;
415 if (OS.WIN32_VERSION >= OS.VERSION (5, 0)) {
416 if ((style & SWT.WRAP) != 0) bits |= OS.SS_EDITCONTROL;
417 }
418 if ((style & SWT.CENTER) != 0) return bits | OS.SS_CENTER;
419 if ((style & SWT.RIGHT) != 0) return bits | OS.SS_RIGHT;
420 if ((style & SWT.WRAP) != 0) return bits | OS.SS_LEFT;
421 return bits | OS.SS_LEFTNOWORDWRAP;
422 }
423
424 TCHAR windowClass () {
425 return LabelClass;
426 }
427
428 int windowProc () {
429 return LabelProc;
430 }
431
432 LRESULT WM_ERASEBKGND (int wParam, int lParam) {
433 LRESULT result = super.WM_ERASEBKGND (wParam, lParam);
434 if (result != null) return result;
435 int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
436 if ((bits & OS.SS_OWNERDRAW) == OS.SS_OWNERDRAW) {
437 return LRESULT.ONE;
438 }
439
447 if (OS.COMCTL32_MAJOR < 6 || !OS.IsAppThemed ()) {
448 if (findImageControl () != null) {
449 drawBackground (wParam);
450 return LRESULT.ONE;
451 }
452 }
453 return result;
454 }
455
456 LRESULT WM_SIZE (int wParam, int lParam) {
457 LRESULT result = super.WM_SIZE (wParam, lParam);
458 if (isDisposed ()) return result;
459 if ((style & SWT.SEPARATOR) != 0) {
460 OS.InvalidateRect (handle, null, true);
461 return result;
462 }
463 int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
464 if ((bits & OS.SS_OWNERDRAW) == OS.SS_OWNERDRAW) {
465 OS.InvalidateRect (handle, null, true);
466 return result;
467 }
468
475 if ((bits & OS.SS_LEFTNOWORDWRAP) != OS.SS_LEFTNOWORDWRAP) {
476 OS.InvalidateRect (handle, null, true);
477 return result;
478 }
479 return result;
480 }
481
482 LRESULT WM_UPDATEUISTATE (int wParam, int lParam) {
483 LRESULT result = super.WM_UPDATEUISTATE (wParam, lParam);
484
492 boolean redraw = findImageControl () != null;
493 if (!redraw) {
494 if ((state & THEME_BACKGROUND) != 0) {
495 if (OS.COMCTL32_MAJOR >= 6 && OS.IsAppThemed ()) {
496 redraw = findThemeControl () != null;
497 }
498 }
499 }
500 if (redraw) {
501 OS.InvalidateRect (handle, null, false);
502 int code = OS.DefWindowProc (handle, OS.WM_UPDATEUISTATE, wParam, lParam);
503 return new LRESULT (code);
504 }
505 return result;
506 }
507
508 LRESULT wmColorChild (int wParam, int lParam) {
509
517 LRESULT result = super.wmColorChild (wParam, lParam);
518 if (OS.COMCTL32_MAJOR < 6 || !OS.IsAppThemed ()) {
519 int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
520 if ((bits & OS.SS_OWNERDRAW) != OS.SS_OWNERDRAW) {
521 if (findImageControl () != null) {
522 OS.SetBkMode (wParam, OS.TRANSPARENT);
523 return new LRESULT (OS.GetStockObject (OS.NULL_BRUSH));
524 }
525 }
526 }
527 return result;
528 }
529
530 LRESULT WM_PAINT (int wParam, int lParam) {
531 if (OS.IsWinCE) {
532 boolean drawImage = image != null;
533 boolean drawSeparator = (style & SWT.SEPARATOR) != 0 && (style & SWT.SHADOW_NONE) == 0;
534 if (drawImage || drawSeparator) {
535 LRESULT result = null;
536 PAINTSTRUCT ps = new PAINTSTRUCT ();
537 GCData data = new GCData ();
538 data.ps = ps;
539 data.hwnd = handle;
540 GC gc = new_GC (data);
541 if (gc != null) {
542 drawBackground (gc.handle);
543 RECT clientRect = new RECT();
544 OS.GetClientRect (handle, clientRect);
545 if (drawSeparator) {
546 RECT rect = new RECT ();
547 int lineWidth = OS.GetSystemMetrics (OS.SM_CXBORDER);
548 int flags = (style & SWT.SHADOW_IN) != 0 ? OS.EDGE_SUNKEN : OS.EDGE_ETCHED;
549 if ((style & SWT.HORIZONTAL) != 0) {
550 int bottom = clientRect.top + Math.max (lineWidth * 2, (clientRect.bottom - clientRect.top) / 2);
551 OS.SetRect (rect, clientRect.left, clientRect.top, clientRect.right, bottom);
552 OS.DrawEdge (gc.handle, rect, flags, OS.BF_BOTTOM);
553 } else {
554 int right = clientRect.left + Math.max (lineWidth * 2, (clientRect.right - clientRect.left) / 2);
555 OS.SetRect (rect, clientRect.left, clientRect.top, right, clientRect.bottom);
556 OS.DrawEdge (gc.handle, rect, flags, OS.BF_RIGHT);
557 }
558 result = LRESULT.ONE;
559 }
560 if (drawImage) {
561 Rectangle imageBounds = image.getBounds ();
562 int x = 0;
563 if ((style & SWT.CENTER) != 0) {
564 x = Math.max (0, (clientRect.right - imageBounds.width) / 2);
565 } else {
566 if ((style & SWT.RIGHT) != 0) {
567 x = Math.max (0, (clientRect.right - imageBounds.width));
568 }
569 }
570 gc.drawImage (image, x, Math.max (0, (clientRect.bottom - imageBounds.height) / 2));
571 result = LRESULT.ONE;
572 }
573 int width = ps.right - ps.left;
574 int height = ps.bottom - ps.top;
575 if (width != 0 && height != 0) {
576 Event event = new Event ();
577 event.gc = gc;
578 event.x = ps.left;
579 event.y = ps.top;
580 event.width = width;
581 event.height = height;
582 sendEvent (SWT.Paint, event);
583 event.gc = null;
585 }
586 gc.dispose ();
587 }
588 return result;
589 }
590 }
591 return super.WM_PAINT(wParam, lParam);
592 }
593
594 LRESULT wmDrawChild (int wParam, int lParam) {
595 DRAWITEMSTRUCT struct = new DRAWITEMSTRUCT ();
596 OS.MoveMemory (struct, lParam, DRAWITEMSTRUCT.sizeof);
597 drawBackground (struct.hDC);
598 if ((style & SWT.SEPARATOR) != 0) {
599 if ((style & SWT.SHADOW_NONE) != 0) return null;
600 RECT rect = new RECT ();
601 int lineWidth = OS.GetSystemMetrics (OS.SM_CXBORDER);
602 int flags = (style & SWT.SHADOW_IN) != 0 ? OS.EDGE_SUNKEN : OS.EDGE_ETCHED;
603 if ((style & SWT.HORIZONTAL) != 0) {
604 int bottom = struct.top + Math.max (lineWidth * 2, (struct.bottom - struct.top) / 2);
605 OS.SetRect (rect, struct.left, struct.top, struct.right, bottom);
606 OS.DrawEdge (struct.hDC, rect, flags, OS.BF_BOTTOM);
607 } else {
608 int right = struct.left + Math.max (lineWidth * 2, (struct.right - struct.left) / 2);
609 OS.SetRect (rect, struct.left, struct.top, right, struct.bottom);
610 OS.DrawEdge (struct.hDC, rect, flags, OS.BF_RIGHT);
611 }
612 } else {
613 int width = struct.right - struct.left;
614 int height = struct.bottom - struct.top;
615 if (width != 0 && height != 0) {
616 boolean drawImage = image != null;
617 boolean drawText = IMAGE_AND_TEXT && text.length () != 0;
618 int margin = drawText && drawImage ? MARGIN : 0;
619 int imageWidth = 0, imageHeight = 0;
620 if (drawImage) {
621 Rectangle rect = image.getBounds ();
622 imageWidth = rect.width;
623 imageHeight = rect.height;
624 }
625 RECT rect = null;
626 TCHAR buffer = null;
627 int textWidth = 0, textHeight = 0, flags = 0;
628 if (drawText) {
629 rect = new RECT ();
630 flags = OS.DT_CALCRECT | OS.DT_EDITCONTROL | OS.DT_EXPANDTABS;
631 if ((style & SWT.LEFT) != 0) flags |= OS.DT_LEFT;
632 if ((style & SWT.CENTER) != 0) flags |= OS.DT_CENTER;
633 if ((style & SWT.RIGHT) != 0) flags |= OS.DT_RIGHT;
634 if ((style & SWT.WRAP) != 0) {
635 flags |= OS.DT_WORDBREAK;
636 rect.right = Math.max (0, width - imageWidth - margin);
637 }
638 buffer = new TCHAR (getCodePage (), text, true);
639 OS.DrawText (struct.hDC, buffer, -1, rect, flags);
640 textWidth = rect.right - rect.left;
641 textHeight = rect.bottom - rect.top;
642 }
643 int x = 0;
644 if ((style & SWT.CENTER) != 0) {
645 x = Math.max (0, (width - imageWidth - textWidth - margin) / 2);
646 } else {
647 if ((style & SWT.RIGHT) != 0) {
648 x = width - imageWidth - textWidth - margin;
649 }
650 }
651 if (drawImage) {
652 GCData data = new GCData();
653 data.device = display;
654 GC gc = GC.win32_new (struct.hDC, data);
655 Image image = getEnabled () ? this.image : new Image (display, this.image, SWT.IMAGE_DISABLE);
656 gc.drawImage (image, x, Math.max (0, (height - imageHeight) / 2));
657 if (image != this.image) image.dispose ();
658 gc.dispose ();
659 x += imageWidth + margin;
660 }
661 if (drawText) {
662 flags &= ~OS.DT_CALCRECT;
663 rect.left = x;
664 rect.right += rect.left;
665 rect.top = Math.max (0, (height - textHeight) / 2);
666 rect.bottom += rect.top;
667 OS.DrawText (struct.hDC, buffer, -1, rect, flags);
668 }
669 }
670 }
671 return null;
672 }
673
674 }
675 |
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