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comparison org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/widgets/ExpandItem.d @ 0:6dd524f61e62

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add dwt win and basic java stuff
author Frank Benoit <benoit@tionex.de>
date Mon, 02 Mar 2009 14:44:16 +0100
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-1:000000000000 0:6dd524f61e62
1 /*******************************************************************************
2 * Copyright (c) 2000, 2008 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 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module org.eclipse.swt.widgets.ExpandItem;
14
15 import org.eclipse.swt.widgets.Item;
16 import org.eclipse.swt.widgets.Widget;
17
18 import org.eclipse.swt.graphics.GC;
19 import org.eclipse.swt.graphics.Image;
20 import org.eclipse.swt.internal.win32.OS;
21 import org.eclipse.swt.widgets.Control;
22 import org.eclipse.swt.widgets.ExpandBar;
23 import org.eclipse.swt.widgets.Item;
24
25 import org.eclipse.swt.SWT;
26 import org.eclipse.swt.SWTException;
27 import org.eclipse.swt.graphics.GC;
28 import org.eclipse.swt.graphics.Image;
29 import org.eclipse.swt.graphics.Rectangle;
30 import org.eclipse.swt.internal.win32.OS;
31
32 import java.lang.all;
33
34 /**
35 * Instances of this class represent a selectable user interface object
36 * that represents a expandable item in a expand bar.
37 * <p>
38 * <dl>
39 * <dt><b>Styles:</b></dt>
40 * <dd>(none)</dd>
41 * <dt><b>Events:</b></dt>
42 * <dd>(none)</dd>
43 * </dl>
44 * </p><p>
45 * IMPORTANT: This class is <em>not</em> intended to be subclassed.
46 * </p>
47 *
48 * @see ExpandBar
49 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
50 *
51 * @since 3.2
52 */
53 public class ExpandItem : Item {
54 ExpandBar parent;
55 Control control;
56 bool expanded, hover;
57 int x, y, width, height;
58 int imageHeight, imageWidth;
59 static const int TEXT_INSET = 6;
60 static const int BORDER = 1;
61 static const int CHEVRON_SIZE = 24;
62
63 /**
64 * Constructs a new instance of this class given its parent
65 * and a style value describing its behavior and appearance.
66 * <p>
67 * The style value is either one of the style constants defined in
68 * class <code>SWT</code> which is applicable to instances of this
69 * class, or must be built by <em>bitwise OR</em>'ing together
70 * (that is, using the <code>int</code> "|" operator) two or more
71 * of those <code>SWT</code> style constants. The class description
72 * lists the style constants that are applicable to the class.
73 * Style bits are also inherited from superclasses.
74 * </p>
75 *
76 * @param parent a composite control which will be the parent of the new instance (cannot be null)
77 * @param style the style of control to construct
78 *
79 * @exception IllegalArgumentException <ul>
80 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
81 * </ul>
82 * @exception SWTException <ul>
83 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
84 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
85 * </ul>
86 *
87 * @see Widget#checkSubclass
88 * @see Widget#getStyle
89 */
90 public this (ExpandBar parent, int style) {
91 this (parent, style, checkNull (parent).getItemCount ());
92 }
93
94 /**
95 * Constructs a new instance of this class given its parent, a
96 * style value describing its behavior and appearance, and the index
97 * at which to place it in the items maintained by its parent.
98 * <p>
99 * The style value is either one of the style constants defined in
100 * class <code>SWT</code> which is applicable to instances of this
101 * class, or must be built by <em>bitwise OR</em>'ing together
102 * (that is, using the <code>int</code> "|" operator) two or more
103 * of those <code>SWT</code> style constants. The class description
104 * lists the style constants that are applicable to the class.
105 * Style bits are also inherited from superclasses.
106 * </p>
107 *
108 * @param parent a composite control which will be the parent of the new instance (cannot be null)
109 * @param style the style of control to construct
110 * @param index the zero-relative index to store the receiver in its parent
111 *
112 * @exception IllegalArgumentException <ul>
113 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
114 * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</li>
115 * </ul>
116 * @exception SWTException <ul>
117 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
118 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
119 * </ul>
120 *
121 * @see Widget#checkSubclass
122 * @see Widget#getStyle
123 */
124 public this (ExpandBar parent, int style, int index) {
125 super (parent, style);
126 this.parent = parent;
127 parent.createItem (this, style, index);
128 }
129
130 static ExpandBar checkNull (ExpandBar control) {
131 if (control is null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
132 return control;
133 }
134
135 private void drawChevron (HDC hDC, RECT* rect) {
136 HBRUSH oldBrush = OS.SelectObject (hDC, OS.GetSysColorBrush (OS.COLOR_BTNFACE));
137 OS.PatBlt (hDC, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, OS.PATCOPY);
138 OS.SelectObject (hDC, oldBrush);
139 rect.left += 4;
140 rect.top += 4;
141 rect.right -= 4;
142 rect.bottom -= 4;
143 HPEN hPen = OS.CreatePen (OS.PS_SOLID, 1, parent.foreground);
144 HPEN oldPen = OS.SelectObject (hDC, hPen);
145 int [] polyline1, polyline2;
146 if (expanded) {
147 int px = rect.left + 5;
148 int py = rect.top + 7;
149 polyline1 = [
150 px,py, px+1,py, px+1,py-1, px+2,py-1, px+2,py-2, px+3,py-2, px+3,py-3,
151 px+3,py-2, px+4,py-2, px+4,py-1, px+5,py-1, px+5,py, px+7,py];
152 py += 4;
153 polyline2 = [
154 px,py, px+1,py, px+1,py-1, px+2,py-1, px+2,py-2, px+3,py-2, px+3,py-3,
155 px+3,py-2, px+4,py-2, px+4,py-1, px+5,py-1, px+5,py, px+7,py];
156 } else {
157 int px = rect.left + 5;
158 int py = rect.top + 4;
159 polyline1 = [
160 px,py, px+1,py, px+1,py+1, px+2,py+1, px+2,py+2, px+3,py+2, px+3,py+3,
161 px+3,py+2, px+4,py+2, px+4,py+1, px+5,py+1, px+5,py, px+7,py];
162 py += 4;
163 polyline2 = [
164 px,py, px+1,py, px+1,py+1, px+2,py+1, px+2,py+2, px+3,py+2, px+3,py+3,
165 px+3,py+2, px+4,py+2, px+4,py+1, px+5,py+1, px+5,py, px+7,py];
166 }
167 OS.Polyline (hDC, cast(POINT*)polyline1.ptr, polyline1.length / 2);
168 OS.Polyline (hDC, cast(POINT*)polyline2.ptr, polyline2.length / 2);
169 if (hover) {
170 HPEN whitePen = OS.CreatePen (OS.PS_SOLID, 1, OS.GetSysColor (OS.COLOR_3DHILIGHT));
171 HPEN darkGrayPen = OS.CreatePen (OS.PS_SOLID, 1, OS.GetSysColor (OS.COLOR_3DSHADOW));
172 OS.SelectObject (hDC, whitePen);
173 int [] points1 = [
174 rect.left, rect.bottom,
175 rect.left, rect.top,
176 rect.right, rect.top];
177 OS.Polyline (hDC, cast(POINT*)points1.ptr, points1.length / 2);
178 OS.SelectObject (hDC, darkGrayPen);
179 int [] points2 = [
180 rect.right, rect.top,
181 rect.right, rect.bottom,
182 rect.left, rect.bottom];
183 OS.Polyline (hDC, cast(POINT*)points2.ptr, points2.length / 2);
184 OS.SelectObject (hDC, oldPen);
185 OS.DeleteObject (whitePen);
186 OS.DeleteObject (darkGrayPen);
187 } else {
188 OS.SelectObject (hDC, oldPen);
189 }
190 OS.DeleteObject (hPen);
191 }
192
193 void drawItem (GC gc, HTHEME hTheme, RECT* clipRect, bool drawFocus) {
194 auto hDC = gc.handle;
195 int headerHeight = parent.getBandHeight ();
196 RECT rect;
197 OS.SetRect (&rect, x, y, x + width, y + headerHeight);
198 if (hTheme !is null) {
199 OS.DrawThemeBackground (hTheme, hDC, OS.EBP_NORMALGROUPHEAD, 0, &rect, clipRect);
200 } else {
201 HBRUSH oldBrush = OS.SelectObject (hDC, OS.GetSysColorBrush (OS.COLOR_BTNFACE));
202 OS.PatBlt (hDC, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, OS.PATCOPY);
203 OS.SelectObject (hDC, oldBrush);
204 }
205 if (image !is null) {
206 rect.left += ExpandItem.TEXT_INSET;
207 if (imageHeight > headerHeight) {
208 gc.drawImage (image, rect.left, rect.top + headerHeight - imageHeight);
209 } else {
210 gc.drawImage (image, rect.left, rect.top + (headerHeight - imageHeight) / 2);
211 }
212 rect.left += imageWidth;
213 }
214 if (text.length > 0) {
215 rect.left += ExpandItem.TEXT_INSET;
216 TCHAR[] buffer = StrToTCHARs ( text/+, parent.getCodePage ()+/ );
217 if (hTheme !is null) {
218 OS.DrawThemeText (hTheme, hDC, OS.EBP_NORMALGROUPHEAD, 0, buffer.ptr, buffer.length, OS.DT_VCENTER | OS.DT_SINGLELINE, 0, &rect);
219 } else {
220 int oldBkMode = OS.SetBkMode (hDC, OS.TRANSPARENT);
221 OS.DrawText (hDC, buffer.ptr, buffer.length, &rect, OS.DT_VCENTER | OS.DT_SINGLELINE);
222 OS.SetBkMode (hDC, oldBkMode);
223 }
224 }
225 int chevronSize = ExpandItem.CHEVRON_SIZE;
226 rect.left = rect.right - chevronSize;
227 rect.top = y + (headerHeight - chevronSize) / 2;
228 rect.bottom = rect.top + chevronSize;
229 if (hTheme !is null) {
230 int partID = expanded ? OS.EBP_NORMALGROUPCOLLAPSE : OS.EBP_NORMALGROUPEXPAND;
231 int stateID = hover ? OS.EBNGC_HOT : OS.EBNGC_NORMAL;
232 OS.DrawThemeBackground (hTheme, hDC, partID, stateID, &rect, clipRect);
233 } else {
234 drawChevron (hDC, &rect);
235 }
236 if (drawFocus) {
237 OS.SetRect (&rect, x + 1, y + 1, x + width - 2, y + headerHeight - 2);
238 OS.DrawFocusRect (hDC, &rect);
239 }
240 if (expanded) {
241 if (!parent.isAppThemed ()) {
242 HPEN pen = OS.CreatePen (OS.PS_SOLID, 1, OS.GetSysColor (OS.COLOR_BTNFACE));
243 HPEN oldPen = OS.SelectObject (hDC, pen);
244 int [] points = [
245 x, y + headerHeight,
246 x, y + headerHeight + height,
247 x + width - 1, y + headerHeight + height,
248 x + width - 1, y + headerHeight - 1];
249 OS.Polyline (hDC, cast(POINT*) points.ptr, points.length / 2);
250 OS.SelectObject (hDC, oldPen);
251 OS.DeleteObject (pen);
252 }
253 }
254 }
255
256 override void destroyWidget () {
257 parent.destroyItem (this);
258 releaseHandle ();
259 }
260
261 /**
262 * Returns the control that is shown when the item is expanded.
263 * If no control has been set, return <code>null</code>.
264 *
265 * @return the control
266 *
267 * @exception SWTException <ul>
268 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
269 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
270 * </ul>
271 */
272 public Control getControl () {
273 checkWidget ();
274 return control;
275 }
276
277 /**
278 * Returns <code>true</code> if the receiver is expanded,
279 * and false otherwise.
280 *
281 * @return the expanded state
282 *
283 * @exception SWTException <ul>
284 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
285 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
286 * </ul>
287 */
288 public bool getExpanded () {
289 checkWidget ();
290 return expanded;
291 }
292
293 /**
294 * Returns the height of the receiver's header
295 *
296 * @return the height of the header
297 *
298 * @exception SWTException <ul>
299 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
300 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
301 * </ul>
302 */
303 public int getHeaderHeight () {
304 checkWidget ();
305 return Math.max (parent.getBandHeight (), imageHeight);
306 }
307
308 /**
309 * Gets the height of the receiver.
310 *
311 * @return the height
312 *
313 * @exception SWTException <ul>
314 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
315 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
316 * </ul>
317 */
318 public int getHeight () {
319 checkWidget ();
320 return height;
321 }
322
323 /**
324 * Returns the receiver's parent, which must be a <code>ExpandBar</code>.
325 *
326 * @return the receiver's parent
327 *
328 * @exception SWTException <ul>
329 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
330 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
331 * </ul>
332 */
333 public ExpandBar getParent () {
334 checkWidget ();
335 return parent;
336 }
337
338 int getPreferredWidth (HTHEME hTheme, HDC hDC) {
339 int width = ExpandItem.TEXT_INSET * 2 + ExpandItem.CHEVRON_SIZE;
340 if (image !is null) {
341 width += ExpandItem.TEXT_INSET + imageWidth;
342 }
343 if (text.length > 0) {
344 RECT rect;
345 TCHAR[] buffer = StrToTCHARs (/+parent.getCodePage (),+/ text);
346 if (hTheme !is null) {
347 OS.GetThemeTextExtent (hTheme, hDC, OS.EBP_NORMALGROUPHEAD, 0, buffer.ptr, buffer.length, OS.DT_SINGLELINE, null, &rect);
348 } else {
349 OS.DrawText (hDC, buffer.ptr, buffer.length, &rect, OS.DT_CALCRECT);
350 }
351 width += (rect.right - rect.left);
352 }
353 return width;
354 }
355
356 bool isHover (int x, int y) {
357 int bandHeight = parent.getBandHeight ();
358 return this.x < x && x < (this.x + width) && this.y < y && y < (this.y + bandHeight);
359 }
360
361 void redraw (bool all) {
362 auto parentHandle = parent.handle;
363 int headerHeight = parent.getBandHeight ();
364 RECT rect;
365 int left = all ? x : x + width - headerHeight;
366 OS.SetRect (&rect, left, y, x + width, y + headerHeight);
367 OS.InvalidateRect (parentHandle, &rect, true);
368 if (imageHeight > headerHeight) {
369 OS.SetRect (&rect, x + ExpandItem.TEXT_INSET, y + headerHeight - imageHeight, x + ExpandItem.TEXT_INSET + imageWidth, y);
370 OS.InvalidateRect (parentHandle, &rect, true);
371 }
372 if (!parent.isAppThemed ()) {
373 OS.SetRect (&rect, x, y + headerHeight, x + width, y + headerHeight + height + 1);
374 OS.InvalidateRect (parentHandle, &rect, true);
375 }
376 }
377
378 override void releaseHandle () {
379 super.releaseHandle ();
380 parent = null;
381 }
382
383 override void releaseWidget () {
384 super.releaseWidget ();
385 control = null;
386 }
387
388 void setBounds (int x, int y, int width, int height, bool move, bool size) {
389 redraw (true);
390 int headerHeight = parent.getBandHeight ();
391 if (move) {
392 if (imageHeight > headerHeight) {
393 y += (imageHeight - headerHeight);
394 }
395 this.x = x;
396 this.y = y;
397 redraw (true);
398 }
399 if (size) {
400 this.width = width;
401 this.height = height;
402 redraw (true);
403 }
404 if (control !is null && !control.isDisposed ()) {
405 if (!parent.isAppThemed ()) {
406 x += BORDER;
407 width = Math.max (0, width - BORDER * 2);
408 height = Math.max (0, height - BORDER);
409 }
410 if (move && size) control.setBounds (x, y + headerHeight, width, height);
411 if (move && !size) control.setLocation (x, y + headerHeight);
412 if (!move && size) control.setSize (width, height);
413 }
414 }
415
416 /**
417 * Sets the control that is shown when the item is expanded.
418 *
419 * @param control the new control (or null)
420 *
421 * @exception IllegalArgumentException <ul>
422 * <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li>
423 * <li>ERROR_INVALID_PARENT - if the control is not in the same widget tree</li>
424 * </ul>
425 * @exception SWTException <ul>
426 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
427 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
428 * </ul>
429 */
430 public void setControl (Control control) {
431 checkWidget ();
432 if (control !is null) {
433 if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
434 if (control.parent !is parent) error (SWT.ERROR_INVALID_PARENT);
435 }
436 this.control = control;
437 if (control !is null) {
438 int headerHeight = parent.getBandHeight ();
439 control.setVisible (expanded);
440 if (!parent.isAppThemed ()) {
441 int width = Math.max (0, this.width - BORDER * 2);
442 int height = Math.max (0, this.height - BORDER);
443 control.setBounds (x + BORDER, y + headerHeight, width, height);
444 } else {
445 control.setBounds (x, y + headerHeight, width, height);
446 }
447 }
448 }
449
450 /**
451 * Sets the expanded state of the receiver.
452 *
453 * @param expanded the new expanded state
454 *
455 * @exception SWTException <ul>
456 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
457 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
458 * </ul>
459 */
460 public void setExpanded (bool expanded) {
461 checkWidget ();
462 this.expanded = expanded;
463 parent.showItem (this);
464 }
465
466 /**
467 * Sets the height of the receiver. This is height of the item when it is expanded,
468 * excluding the height of the header.
469 *
470 * @param height the new height
471 *
472 * @exception SWTException <ul>
473 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
474 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
475 * </ul>
476 */
477 public void setHeight (int height) {
478 checkWidget ();
479 if (height < 0) return;
480 setBounds (0, 0, width, height, false, true);
481 if (expanded) parent.layoutItems (parent.indexOf (this) + 1, true);
482 }
483
484 override public void setImage (Image image) {
485 super.setImage (image);
486 int oldImageHeight = imageHeight;
487 if (image !is null) {
488 Rectangle bounds = image.getBounds ();
489 imageHeight = bounds.height;
490 imageWidth = bounds.width;
491 } else {
492 imageHeight = imageWidth = 0;
493 }
494 if (oldImageHeight !is imageHeight) {
495 parent.layoutItems (parent.indexOf (this), true);
496 } else {
497 redraw (true);
498 }
499 }
500
501 override public void setText (String string) {
502 super.setText (string);
503 redraw (true);
504 }
505 }
506