Mercurial > projects > dwt-win
annotate dwt/custom/CLabel.d @ 213:36f5cb12e1a2
Update to SWT 3.4M7
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sat, 17 May 2008 17:34:28 +0200 |
| parents | ab60f3309436 |
| children | fd9c62a2998e |
| rev | line source |
|---|---|
| 155 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2000, 2006 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 dwt.custom.CLabel; | |
| 14 | |
| 15 | |
| 16 import dwt.DWT; | |
| 17 import dwt.DWTException; | |
| 18 import dwt.accessibility.ACC; | |
| 19 import dwt.accessibility.Accessible; | |
| 20 import dwt.accessibility.AccessibleAdapter; | |
| 21 import dwt.accessibility.AccessibleControlAdapter; | |
| 22 import dwt.accessibility.AccessibleControlEvent; | |
| 23 import dwt.accessibility.AccessibleEvent; | |
| 24 import dwt.events.DisposeEvent; | |
| 25 import dwt.events.DisposeListener; | |
| 26 import dwt.events.PaintEvent; | |
| 27 import dwt.events.PaintListener; | |
| 28 import dwt.events.TraverseEvent; | |
| 29 import dwt.events.TraverseListener; | |
| 30 import dwt.graphics.Color; | |
| 31 import dwt.graphics.Font; | |
| 32 import dwt.graphics.GC; | |
| 33 import dwt.graphics.Image; | |
| 34 import dwt.graphics.Point; | |
| 35 import dwt.graphics.Rectangle; | |
| 213 | 36 import dwt.graphics.TextLayout; |
| 155 | 37 import dwt.widgets.Canvas; |
| 38 import dwt.widgets.Composite; | |
| 39 import dwt.widgets.Control; | |
| 40 import dwt.widgets.Display; | |
| 41 | |
| 42 static import tango.text.Unicode; | |
| 43 static import tango.text.convert.Utf; | |
| 44 import dwt.dwthelper.utils; | |
| 45 | |
| 46 /** | |
| 47 * A Label which supports aligned text and/or an image and different border styles. | |
| 48 * <p> | |
| 49 * If there is not enough space a CLabel uses the following strategy to fit the | |
| 50 * information into the available space: | |
| 51 * <pre> | |
| 52 * ignores the indent in left align mode | |
| 53 * ignores the image and the gap | |
| 54 * shortens the text by replacing the center portion of the label with an ellipsis | |
| 55 * shortens the text by removing the center portion of the label | |
| 56 * </pre> | |
| 57 * <p> | |
| 58 * <dl> | |
| 59 * <dt><b>Styles:</b> | |
| 60 * <dd>LEFT, RIGHT, CENTER, SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd> | |
| 61 * <dt><b>Events:</b> | |
| 62 * <dd></dd> | |
| 63 * </dl> | |
| 64 * | |
| 65 * </p><p> | |
| 66 * IMPORTANT: This class is <em>not</em> intended to be subclassed. | |
| 67 * </p> | |
| 68 */ | |
| 69 public class CLabel : Canvas { | |
| 70 | |
| 71 alias Canvas.computeSize computeSize; | |
| 72 | |
| 73 /** Gap between icon and text */ | |
| 74 private static const int GAP = 5; | |
| 75 /** Left and right margins */ | |
| 76 private static const int INDENT = 3; | |
| 77 /** a string inserted in the middle of text that has been shortened */ | |
|
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78 private static const String ELLIPSIS = "..."; //$NON-NLS-1$ // could use the ellipsis glyph on some platforms "\u2026" |
| 155 | 79 /** the alignment. Either CENTER, RIGHT, LEFT. Default is LEFT*/ |
| 80 private int align_ = DWT.LEFT; | |
| 81 private int hIndent = INDENT; | |
| 82 private int vIndent = INDENT; | |
| 83 /** the current text */ | |
|
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84 private String text; |
| 155 | 85 /** the current icon */ |
| 86 private Image image; | |
| 87 // The tooltip is used for two purposes - the application can set | |
| 88 // a tooltip or the tooltip can be used to display the full text when the | |
| 89 // the text has been truncated due to the label being too short. | |
| 90 // The appToolTip stores the tooltip set by the application. Control.tooltiptext | |
| 91 // contains whatever tooltip is currently being displayed. | |
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92 private String appToolTipText; |
| 155 | 93 |
| 94 private Image backgroundImage; | |
| 95 private Color[] gradientColors; | |
| 96 private int[] gradientPercents; | |
| 97 private bool gradientVertical; | |
| 98 private Color background; | |
| 99 | |
| 100 private static int DRAW_FLAGS = DWT.DRAW_MNEMONIC | DWT.DRAW_TAB | DWT.DRAW_TRANSPARENT | DWT.DRAW_DELIMITER; | |
| 101 | |
| 102 /** | |
| 103 * Constructs a new instance of this class given its parent | |
| 104 * and a style value describing its behavior and appearance. | |
| 105 * <p> | |
| 106 * The style value is either one of the style constants defined in | |
| 107 * class <code>DWT</code> which is applicable to instances of this | |
| 108 * class, or must be built by <em>bitwise OR</em>'ing together | |
| 109 * (that is, using the <code>int</code> "|" operator) two or more | |
| 110 * of those <code>DWT</code> style constants. The class description | |
| 111 * lists the style constants that are applicable to the class. | |
| 112 * Style bits are also inherited from superclasses. | |
| 113 * </p> | |
| 114 * | |
| 115 * @param parent a widget which will be the parent of the new instance (cannot be null) | |
| 116 * @param style the style of widget to construct | |
| 117 * | |
| 118 * @exception IllegalArgumentException <ul> | |
| 119 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> | |
| 120 * </ul> | |
| 121 * @exception DWTException <ul> | |
| 122 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> | |
| 123 * </ul> | |
| 124 * | |
| 125 * @see DWT#LEFT | |
| 126 * @see DWT#RIGHT | |
| 127 * @see DWT#CENTER | |
| 128 * @see DWT#SHADOW_IN | |
| 129 * @see DWT#SHADOW_OUT | |
| 130 * @see DWT#SHADOW_NONE | |
| 131 * @see #getStyle() | |
| 132 */ | |
| 133 public this(Composite parent, int style) { | |
| 134 super(parent, checkStyle(style)); | |
| 135 if ((style & (DWT.CENTER | DWT.RIGHT)) is 0) style |= DWT.LEFT; | |
| 136 if ((style & DWT.CENTER) !is 0) align_ = DWT.CENTER; | |
| 137 if ((style & DWT.RIGHT) !is 0) align_ = DWT.RIGHT; | |
| 138 if ((style & DWT.LEFT) !is 0) align_ = DWT.LEFT; | |
| 139 | |
| 140 addPaintListener(new class() PaintListener{ | |
| 141 public void paintControl(PaintEvent event) { | |
| 142 onPaint(event); | |
| 143 } | |
| 144 }); | |
| 145 | |
| 146 addDisposeListener(new class() DisposeListener{ | |
| 147 public void widgetDisposed(DisposeEvent event) { | |
| 148 onDispose(event); | |
| 149 } | |
| 150 }); | |
| 151 | |
| 152 addTraverseListener(new class() TraverseListener { | |
| 153 public void keyTraversed(TraverseEvent event) { | |
| 154 if (event.detail is DWT.TRAVERSE_MNEMONIC) { | |
| 155 onMnemonic(event); | |
| 156 } | |
| 157 } | |
| 158 }); | |
| 159 | |
| 160 initAccessible(); | |
| 161 | |
| 162 } | |
| 163 /** | |
| 164 * Check the style bits to ensure that no invalid styles are applied. | |
| 165 */ | |
| 166 private static int checkStyle (int style) { | |
| 167 if ((style & DWT.BORDER) !is 0) style |= DWT.SHADOW_IN; | |
| 168 int mask = DWT.SHADOW_IN | DWT.SHADOW_OUT | DWT.SHADOW_NONE | DWT.LEFT_TO_RIGHT | DWT.RIGHT_TO_LEFT; | |
| 169 style = style & mask; | |
| 170 return style |= DWT.NO_FOCUS | DWT.DOUBLE_BUFFERED; | |
| 171 } | |
| 172 | |
| 173 //protected void checkSubclass () { | |
| 174 // String name = getClass().getName (); | |
| 175 // String validName = CLabel.class.getName(); | |
| 176 // if (!validName.equals(name)) { | |
| 177 // DWT.error (DWT.ERROR_INVALID_SUBCLASS); | |
| 178 // } | |
| 179 //} | |
| 180 | |
| 181 public override Point computeSize(int wHint, int hHint, bool changed) { | |
| 182 checkWidget(); | |
| 183 Point e = getTotalSize(image, text); | |
| 184 if (wHint is DWT.DEFAULT){ | |
| 185 e.x += 2*hIndent; | |
| 186 } else { | |
| 187 e.x = wHint; | |
| 188 } | |
| 189 if (hHint is DWT.DEFAULT) { | |
| 190 e.y += 2*vIndent; | |
| 191 } else { | |
| 192 e.y = hHint; | |
| 193 } | |
| 194 return e; | |
| 195 } | |
| 196 /** | |
| 197 * Draw a rectangle in the given colors. | |
| 198 */ | |
| 199 private void drawBevelRect(GC gc, int x, int y, int w, int h, Color topleft, Color bottomright) { | |
| 200 gc.setForeground(bottomright); | |
| 201 gc.drawLine(x+w, y, x+w, y+h); | |
| 202 gc.drawLine(x, y+h, x+w, y+h); | |
| 203 | |
| 204 gc.setForeground(topleft); | |
| 205 gc.drawLine(x, y, x+w-1, y); | |
| 206 gc.drawLine(x, y, x, y+h-1); | |
| 207 } | |
| 208 /* | |
| 209 * Return the lowercase of the first non-'&' character following | |
| 210 * an '&' character in the given string. If there are no '&' | |
| 211 * characters in the given string, return '\0'. | |
| 212 */ | |
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213 dchar _findMnemonic (String string) { |
| 155 | 214 if (string is null) return '\0'; |
| 215 int index = 0; | |
| 216 int length = string.length; | |
| 217 do { | |
| 218 while (index < length && string[index] !is '&') index++; | |
| 219 if (++index >= length) return '\0'; | |
| 220 if (string[index] !is '&') { | |
| 221 dchar[1] tmp; uint ate; | |
| 222 dchar[] tmp2 = tango.text.convert.Utf.toString32( string[index .. Math.min( index + 4, string.length ) ], tmp, &ate ); | |
| 223 assert( tmp2.length == 1 ); | |
| 224 return tango.text.Unicode.toLower( tmp2 )[0]; | |
| 225 } | |
| 226 index++; | |
| 227 } while (index < length); | |
| 228 return '\0'; | |
| 229 } | |
| 230 /** | |
| 231 * Returns the alignment. | |
| 232 * The alignment style (LEFT, CENTER or RIGHT) is returned. | |
| 233 * | |
| 234 * @return DWT.LEFT, DWT.RIGHT or DWT.CENTER | |
| 235 */ | |
| 236 public int getAlignment() { | |
| 237 //checkWidget(); | |
| 238 return align_; | |
| 239 } | |
| 240 /** | |
| 241 * Return the CLabel's image or <code>null</code>. | |
| 242 * | |
| 243 * @return the image of the label or null | |
| 244 */ | |
| 245 public Image getImage() { | |
| 246 //checkWidget(); | |
| 247 return image; | |
| 248 } | |
| 249 /** | |
| 250 * Compute the minimum size. | |
| 251 */ | |
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252 private Point getTotalSize(Image image, String text) { |
| 155 | 253 Point size = new Point(0, 0); |
| 254 | |
| 255 if (image !is null) { | |
| 256 Rectangle r = image.getBounds(); | |
| 257 size.x += r.width; | |
| 258 size.y += r.height; | |
| 259 } | |
| 260 | |
| 261 GC gc = new GC(this); | |
| 262 if (text !is null && text.length > 0) { | |
| 263 Point e = gc.textExtent(text, DRAW_FLAGS); | |
| 264 size.x += e.x; | |
| 265 size.y = Math.max(size.y, e.y); | |
| 266 if (image !is null) size.x += GAP; | |
| 267 } else { | |
| 268 size.y = Math.max(size.y, gc.getFontMetrics().getHeight()); | |
| 269 } | |
| 270 gc.dispose(); | |
| 271 | |
| 272 return size; | |
| 273 } | |
| 274 public override int getStyle () { | |
| 275 int style = super.getStyle(); | |
| 276 switch (align_) { | |
| 277 case DWT.RIGHT: style |= DWT.RIGHT; break; | |
| 278 case DWT.CENTER: style |= DWT.CENTER; break; | |
| 279 case DWT.LEFT: style |= DWT.LEFT; break; | |
| 280 default: | |
| 281 } | |
| 282 return style; | |
| 283 } | |
| 284 | |
| 285 /** | |
| 286 * Return the Label's text. | |
| 287 * | |
| 288 * @return the text of the label or null | |
| 289 */ | |
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290 public String getText() { |
| 155 | 291 //checkWidget(); |
| 292 return text; | |
| 293 } | |
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parents:
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diff
changeset
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294 public override String getToolTipText () { |
| 155 | 295 checkWidget(); |
| 296 return appToolTipText; | |
| 297 } | |
| 298 private void initAccessible() { | |
| 299 Accessible accessible = getAccessible(); | |
| 300 accessible.addAccessibleListener(new class() AccessibleAdapter { | |
| 301 public void getName(AccessibleEvent e) { | |
| 302 e.result = getText(); | |
| 303 } | |
| 304 | |
| 305 public void getHelp(AccessibleEvent e) { | |
| 306 e.result = getToolTipText(); | |
| 307 } | |
| 308 | |
| 309 public void getKeyboardShortcut(AccessibleEvent e) { | |
| 310 dchar mnemonic = _findMnemonic(this.outer.text); | |
| 311 if (mnemonic !is '\0') { | |
| 312 dchar[1] d; | |
| 313 d[0] = mnemonic; | |
| 314 e.result = "Alt+" ~ tango.text.convert.Utf.toString(d); //$NON-NLS-1$ | |
| 315 } | |
| 316 } | |
| 317 }); | |
| 318 | |
| 319 accessible.addAccessibleControlListener(new class() AccessibleControlAdapter { | |
| 320 public void getChildAtPoint(AccessibleControlEvent e) { | |
| 321 e.childID = ACC.CHILDID_SELF; | |
| 322 } | |
| 323 | |
| 324 public void getLocation(AccessibleControlEvent e) { | |
| 325 Rectangle rect = getDisplay().map(getParent(), null, getBounds()); | |
| 326 e.x = rect.x; | |
| 327 e.y = rect.y; | |
| 328 e.width = rect.width; | |
| 329 e.height = rect.height; | |
| 330 } | |
| 331 | |
| 332 public void getChildCount(AccessibleControlEvent e) { | |
| 333 e.detail = 0; | |
| 334 } | |
| 335 | |
| 336 public void getRole(AccessibleControlEvent e) { | |
| 337 e.detail = ACC.ROLE_LABEL; | |
| 338 } | |
| 339 | |
| 340 public void getState(AccessibleControlEvent e) { | |
| 341 e.detail = ACC.STATE_READONLY; | |
| 342 } | |
| 343 }); | |
| 344 } | |
| 345 void onDispose(DisposeEvent event) { | |
| 346 gradientColors = null; | |
| 347 gradientPercents = null; | |
| 348 backgroundImage = null; | |
| 349 text = null; | |
| 350 image = null; | |
| 351 appToolTipText = null; | |
| 352 } | |
| 353 void onMnemonic(TraverseEvent event) { | |
| 354 dchar mnemonic = _findMnemonic(text); | |
| 355 if (mnemonic is '\0') return; | |
| 356 dchar[1] d; uint ate; | |
| 357 auto r = tango.text.convert.Utf.toString32( [event.character][], d, &ate ); | |
| 358 if (tango.text.Unicode.toLower(r)[0] !is mnemonic) return; | |
| 359 Composite control = this.getParent(); | |
| 360 while (control !is null) { | |
| 361 Control [] children = control.getChildren(); | |
| 362 int index = 0; | |
| 363 while (index < children.length) { | |
| 364 if (children [index] is this) break; | |
| 365 index++; | |
| 366 } | |
| 367 index++; | |
| 368 if (index < children.length) { | |
| 369 if (children [index].setFocus ()) { | |
| 370 event.doit = true; | |
| 371 event.detail = DWT.TRAVERSE_NONE; | |
| 372 } | |
| 373 } | |
| 374 control = control.getParent(); | |
| 375 } | |
| 376 } | |
| 377 | |
| 378 void onPaint(PaintEvent event) { | |
| 379 Rectangle rect = getClientArea(); | |
| 380 if (rect.width is 0 || rect.height is 0) return; | |
| 381 | |
| 382 bool shortenText_ = false; | |
|
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parents:
155
diff
changeset
|
383 String t = text; |
| 155 | 384 Image img = image; |
| 385 int availableWidth = Math.max(0, rect.width - 2*hIndent); | |
| 386 Point extent = getTotalSize(img, t); | |
| 387 if (extent.x > availableWidth) { | |
| 388 img = null; | |
| 389 extent = getTotalSize(img, t); | |
| 390 if (extent.x > availableWidth) { | |
| 391 shortenText_ = true; | |
| 392 } | |
| 393 } | |
| 394 | |
| 395 GC gc = event.gc; | |
|
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parents:
155
diff
changeset
|
396 String[] lines = text is null ? null : splitString(text); |
| 155 | 397 |
| 398 // shorten the text | |
| 399 if (shortenText_) { | |
| 400 extent.x = 0; | |
| 401 for(int i = 0; i < lines.length; i++) { | |
| 402 Point e = gc.textExtent(lines[i], DRAW_FLAGS); | |
| 403 if (e.x > availableWidth) { | |
| 404 lines[i] = shortenText(gc, lines[i], availableWidth); | |
| 405 extent.x = Math.max(extent.x, getTotalSize(null, lines[i]).x); | |
| 406 } else { | |
| 407 extent.x = Math.max(extent.x, e.x); | |
| 408 } | |
| 409 } | |
| 410 if (appToolTipText is null) { | |
| 411 super.setToolTipText(text); | |
| 412 } | |
| 413 } else { | |
| 414 super.setToolTipText(appToolTipText); | |
| 415 } | |
| 416 | |
| 417 // determine horizontal position | |
| 418 int x = rect.x + hIndent; | |
| 419 if (align_ is DWT.CENTER) { | |
| 420 x = (rect.width - extent.x)/2; | |
| 421 } | |
| 422 if (align_ is DWT.RIGHT) { | |
| 423 x = rect.width - hIndent - extent.x; | |
| 424 } | |
| 425 | |
| 426 // draw a background image behind the text | |
| 427 try { | |
| 428 if (backgroundImage !is null) { | |
| 429 // draw a background image behind the text | |
| 430 Rectangle imageRect = backgroundImage.getBounds(); | |
| 431 // tile image to fill space | |
| 432 gc.setBackground(getBackground()); | |
| 433 gc.fillRectangle(rect); | |
| 434 int xPos = 0; | |
| 435 while (xPos < rect.width) { | |
| 436 int yPos = 0; | |
| 437 while (yPos < rect.height) { | |
| 438 gc.drawImage(backgroundImage, xPos, yPos); | |
| 439 yPos += imageRect.height; | |
| 440 } | |
| 441 xPos += imageRect.width; | |
| 442 } | |
| 443 } else if (gradientColors !is null) { | |
| 444 // draw a gradient behind the text | |
| 445 final Color oldBackground = gc.getBackground(); | |
| 446 if (gradientColors.length is 1) { | |
| 447 if (gradientColors[0] !is null) gc.setBackground(gradientColors[0]); | |
| 448 gc.fillRectangle(0, 0, rect.width, rect.height); | |
| 449 } else { | |
| 450 final Color oldForeground = gc.getForeground(); | |
| 451 Color lastColor = gradientColors[0]; | |
| 452 if (lastColor is null) lastColor = oldBackground; | |
| 453 int pos = 0; | |
| 454 for (int i = 0; i < gradientPercents.length; ++i) { | |
| 455 gc.setForeground(lastColor); | |
| 456 lastColor = gradientColors[i + 1]; | |
| 457 if (lastColor is null) lastColor = oldBackground; | |
| 458 gc.setBackground(lastColor); | |
| 459 if (gradientVertical) { | |
| 460 final int gradientHeight = (gradientPercents[i] * rect.height / 100) - pos; | |
| 461 gc.fillGradientRectangle(0, pos, rect.width, gradientHeight, true); | |
| 462 pos += gradientHeight; | |
| 463 } else { | |
| 464 final int gradientWidth = (gradientPercents[i] * rect.width / 100) - pos; | |
| 465 gc.fillGradientRectangle(pos, 0, gradientWidth, rect.height, false); | |
| 466 pos += gradientWidth; | |
| 467 } | |
| 468 } | |
| 469 if (gradientVertical && pos < rect.height) { | |
| 470 gc.setBackground(getBackground()); | |
| 471 gc.fillRectangle(0, pos, rect.width, rect.height - pos); | |
| 472 } | |
| 473 if (!gradientVertical && pos < rect.width) { | |
| 474 gc.setBackground(getBackground()); | |
| 475 gc.fillRectangle(pos, 0, rect.width - pos, rect.height); | |
| 476 } | |
| 477 gc.setForeground(oldForeground); | |
| 478 } | |
| 479 gc.setBackground(oldBackground); | |
| 480 } else { | |
| 481 if (background !is null || (getStyle() & DWT.DOUBLE_BUFFERED) is 0) { | |
| 482 gc.setBackground(getBackground()); | |
| 483 gc.fillRectangle(rect); | |
| 484 } | |
| 485 } | |
| 486 } catch (DWTException e) { | |
| 487 if ((getStyle() & DWT.DOUBLE_BUFFERED) is 0) { | |
| 488 gc.setBackground(getBackground()); | |
| 489 gc.fillRectangle(rect); | |
| 490 } | |
| 491 } | |
| 492 | |
| 493 // draw border | |
| 494 int style = getStyle(); | |
| 495 if ((style & DWT.SHADOW_IN) !is 0 || (style & DWT.SHADOW_OUT) !is 0) { | |
| 496 paintBorder(gc, rect); | |
| 497 } | |
| 498 | |
| 499 // draw the image | |
| 500 if (img !is null) { | |
| 501 Rectangle imageRect = img.getBounds(); | |
| 502 gc.drawImage(img, 0, 0, imageRect.width, imageRect.height, | |
| 503 x, (rect.height-imageRect.height)/2, imageRect.width, imageRect.height); | |
| 504 x += imageRect.width + GAP; | |
| 505 extent.x -= imageRect.width + GAP; | |
| 506 } | |
| 507 // draw the text | |
| 508 if (lines !is null) { | |
| 509 int lineHeight = gc.getFontMetrics().getHeight(); | |
| 510 int textHeight = lines.length * lineHeight; | |
| 511 int lineY = Math.max(vIndent, rect.y + (rect.height - textHeight) / 2); | |
| 512 gc.setForeground(getForeground()); | |
| 513 for (int i = 0; i < lines.length; i++) { | |
| 514 int lineX = x; | |
| 515 if (lines.length > 1) { | |
| 516 if (align_ is DWT.CENTER) { | |
| 517 int lineWidth = gc.textExtent(lines[i], DRAW_FLAGS).x; | |
| 518 lineX = x + Math.max(0, (extent.x - lineWidth) / 2); | |
| 519 } | |
| 520 if (align_ is DWT.RIGHT) { | |
| 521 int lineWidth = gc.textExtent(lines[i], DRAW_FLAGS).x; | |
| 522 lineX = Math.max(x, rect.x + rect.width - hIndent - lineWidth); | |
| 523 } | |
| 524 } | |
| 525 gc.drawText(lines[i], lineX, lineY, DRAW_FLAGS); | |
| 526 lineY += lineHeight; | |
| 527 } | |
| 528 } | |
| 529 } | |
| 530 /** | |
| 531 * Paint the Label's border. | |
| 532 */ | |
| 533 private void paintBorder(GC gc, Rectangle r) { | |
| 534 Display disp= getDisplay(); | |
| 535 | |
| 536 Color c1 = null; | |
| 537 Color c2 = null; | |
| 538 | |
| 539 int style = getStyle(); | |
| 540 if ((style & DWT.SHADOW_IN) !is 0) { | |
| 541 c1 = disp.getSystemColor(DWT.COLOR_WIDGET_NORMAL_SHADOW); | |
| 542 c2 = disp.getSystemColor(DWT.COLOR_WIDGET_HIGHLIGHT_SHADOW); | |
| 543 } | |
| 544 if ((style & DWT.SHADOW_OUT) !is 0) { | |
| 545 c1 = disp.getSystemColor(DWT.COLOR_WIDGET_LIGHT_SHADOW); | |
| 546 c2 = disp.getSystemColor(DWT.COLOR_WIDGET_NORMAL_SHADOW); | |
| 547 } | |
| 548 | |
| 549 if (c1 !is null && c2 !is null) { | |
| 550 gc.setLineWidth(1); | |
| 551 drawBevelRect(gc, r.x, r.y, r.width-1, r.height-1, c1, c2); | |
| 552 } | |
| 553 } | |
| 554 /** | |
| 555 * Set the alignment of the CLabel. | |
| 556 * Use the values LEFT, CENTER and RIGHT to align image and text within the available space. | |
| 557 * | |
| 558 * @param align the alignment style of LEFT, RIGHT or CENTER | |
| 559 * | |
| 560 * @exception DWTException <ul> | |
| 561 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 562 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 563 * <li>ERROR_INVALID_ARGUMENT - if the value of align is not one of DWT.LEFT, DWT.RIGHT or DWT.CENTER</li> | |
| 564 * </ul> | |
| 565 */ | |
| 566 public void setAlignment(int align_) { | |
| 567 checkWidget(); | |
| 568 if (align_ !is DWT.LEFT && align_ !is DWT.RIGHT && align_ !is DWT.CENTER) { | |
| 569 DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 570 } | |
| 571 if (this.align_ !is align_) { | |
| 572 this.align_ = align_; | |
| 573 redraw(); | |
| 574 } | |
| 575 } | |
| 576 | |
| 577 public override void setBackground (Color color) { | |
| 578 super.setBackground (color); | |
| 579 // Are these settings the same as before? | |
| 580 if (backgroundImage is null && | |
| 581 gradientColors is null && | |
| 582 gradientPercents is null) { | |
| 583 if (color is null) { | |
| 584 if (background is null) return; | |
| 585 } else { | |
| 586 if (color ==/*eq*/ background) return; | |
| 587 } | |
| 588 } | |
| 589 background = color; | |
| 590 backgroundImage = null; | |
| 591 gradientColors = null; | |
| 592 gradientPercents = null; | |
| 593 redraw (); | |
| 594 } | |
| 595 | |
| 596 /** | |
| 597 * Specify a gradient of colours to be drawn in the background of the CLabel. | |
| 598 * <p>For example, to draw a gradient that varies from dark blue to blue and then to | |
| 599 * white and stays white for the right half of the label, use the following call | |
| 600 * to setBackground:</p> | |
| 601 * <pre> | |
| 602 * clabel.setBackground(new Color[]{display.getSystemColor(DWT.COLOR_DARK_BLUE), | |
| 603 * display.getSystemColor(DWT.COLOR_BLUE), | |
| 604 * display.getSystemColor(DWT.COLOR_WHITE), | |
| 605 * display.getSystemColor(DWT.COLOR_WHITE)}, | |
| 606 * new int[] {25, 50, 100}); | |
| 607 * </pre> | |
| 608 * | |
| 609 * @param colors an array of Color that specifies the colors to appear in the gradient | |
| 610 * in order of appearance from left to right; The value <code>null</code> | |
| 611 * clears the background gradient; the value <code>null</code> can be used | |
| 612 * inside the array of Color to specify the background color. | |
| 613 * @param percents an array of integers between 0 and 100 specifying the percent of the width | |
| 614 * of the widget at which the color should change; the size of the percents | |
| 615 * array must be one less than the size of the colors array. | |
| 616 * | |
| 617 * @exception DWTException <ul> | |
| 618 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 619 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 620 * <li>ERROR_INVALID_ARGUMENT - if the values of colors and percents are not consistent</li> | |
| 621 * </ul> | |
| 622 */ | |
| 623 public void setBackground(Color[] colors, int[] percents) { | |
| 624 setBackground(colors, percents, false); | |
| 625 } | |
| 626 /** | |
| 627 * Specify a gradient of colours to be drawn in the background of the CLabel. | |
| 628 * <p>For example, to draw a gradient that varies from dark blue to white in the vertical, | |
| 629 * direction use the following call | |
| 630 * to setBackground:</p> | |
| 631 * <pre> | |
| 632 * clabel.setBackground(new Color[]{display.getSystemColor(DWT.COLOR_DARK_BLUE), | |
| 633 * display.getSystemColor(DWT.COLOR_WHITE)}, | |
| 634 * new int[] {100}, true); | |
| 635 * </pre> | |
| 636 * | |
| 637 * @param colors an array of Color that specifies the colors to appear in the gradient | |
| 638 * in order of appearance from left/top to right/bottom; The value <code>null</code> | |
| 639 * clears the background gradient; the value <code>null</code> can be used | |
| 640 * inside the array of Color to specify the background color. | |
| 641 * @param percents an array of integers between 0 and 100 specifying the percent of the width/height | |
| 642 * of the widget at which the color should change; the size of the percents | |
| 643 * array must be one less than the size of the colors array. | |
| 644 * @param vertical indicate the direction of the gradient. True is vertical and false is horizontal. | |
| 645 * | |
| 646 * @exception DWTException <ul> | |
| 647 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 648 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 649 * <li>ERROR_INVALID_ARGUMENT - if the values of colors and percents are not consistent</li> | |
| 650 * </ul> | |
| 651 * | |
| 652 * @since 3.0 | |
| 653 */ | |
| 654 public void setBackground(Color[] colors, int[] percents, bool vertical) { | |
| 655 checkWidget(); | |
| 656 if (colors !is null) { | |
| 657 if (percents is null || percents.length !is colors.length - 1) { | |
| 658 DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 659 } | |
| 660 if (getDisplay().getDepth() < 15) { | |
| 661 // Don't use gradients on low color displays | |
| 662 colors = [colors[colors.length - 1]]; | |
| 663 percents = null; | |
| 664 } | |
| 665 for (int i = 0; i < percents.length; i++) { | |
| 666 if (percents[i] < 0 || percents[i] > 100) { | |
| 667 DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 668 } | |
| 669 if (i > 0 && percents[i] < percents[i-1]) { | |
| 670 DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 671 } | |
| 672 } | |
| 673 } | |
| 674 | |
| 675 // Are these settings the same as before? | |
| 676 final Color background = getBackground(); | |
| 677 if (backgroundImage is null) { | |
| 678 if ((gradientColors !is null) && (colors !is null) && | |
| 679 (gradientColors.length is colors.length)) { | |
| 680 bool same = false; | |
| 681 for (int i = 0; i < gradientColors.length; i++) { | |
| 682 same = (gradientColors[i] is colors[i]) || | |
| 683 ((gradientColors[i] is null) && (colors[i] is background)) || | |
| 684 ((gradientColors[i] is background) && (colors[i] is null)); | |
| 685 if (!same) break; | |
| 686 } | |
| 687 if (same) { | |
| 688 for (int i = 0; i < gradientPercents.length; i++) { | |
| 689 same = gradientPercents[i] is percents[i]; | |
| 690 if (!same) break; | |
| 691 } | |
| 692 } | |
| 693 if (same && this.gradientVertical is vertical) return; | |
| 694 } | |
| 695 } else { | |
| 696 backgroundImage = null; | |
| 697 } | |
| 698 // Store the new settings | |
| 699 if (colors is null) { | |
| 700 gradientColors = null; | |
| 701 gradientPercents = null; | |
| 702 gradientVertical = false; | |
| 703 } else { | |
| 704 gradientColors = new Color[colors.length]; | |
| 705 for (int i = 0; i < colors.length; ++i) | |
| 706 gradientColors[i] = (colors[i] !is null) ? colors[i] : background; | |
| 707 gradientPercents = new int[percents.length]; | |
| 708 for (int i = 0; i < percents.length; ++i) | |
| 709 gradientPercents[i] = percents[i]; | |
| 710 gradientVertical = vertical; | |
| 711 } | |
| 712 // Refresh with the new settings | |
| 713 redraw(); | |
| 714 } | |
| 715 /** | |
| 716 * Set the image to be drawn in the background of the label. | |
| 717 * | |
| 718 * @param image the image to be drawn in the background | |
| 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 public void setBackground(Image image) { | |
| 726 checkWidget(); | |
| 727 if (image is backgroundImage) return; | |
| 728 if (image !is null) { | |
| 729 gradientColors = null; | |
| 730 gradientPercents = null; | |
| 731 } | |
| 732 backgroundImage = image; | |
| 733 redraw(); | |
| 734 | |
| 735 } | |
| 736 public override void setFont(Font font) { | |
| 737 super.setFont(font); | |
| 738 redraw(); | |
| 739 } | |
| 740 /** | |
| 741 * Set the label's Image. | |
| 742 * The value <code>null</code> clears it. | |
| 743 * | |
| 744 * @param image the image to be displayed in the label or null | |
| 745 * | |
| 746 * @exception DWTException <ul> | |
| 747 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 748 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 749 * </ul> | |
| 750 */ | |
| 751 public void setImage(Image image) { | |
| 752 checkWidget(); | |
| 753 if (image !is this.image) { | |
| 754 this.image = image; | |
| 755 redraw(); | |
| 756 } | |
| 757 } | |
| 758 /** | |
| 759 * Set the label's text. | |
| 760 * The value <code>null</code> clears it. | |
| 761 * | |
| 762 * @param text the text to be displayed in the label or null | |
| 763 * | |
| 764 * @exception DWTException <ul> | |
| 765 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 766 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 767 * </ul> | |
| 768 */ | |
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769 public void setText(String text) { |
| 155 | 770 checkWidget(); |
| 771 if (text is null) text = ""; //$NON-NLS-1$ | |
| 772 if ( text !=/*eq*/ this.text) { | |
| 773 this.text = text; | |
| 774 redraw(); | |
| 775 } | |
| 776 } | |
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777 public override void setToolTipText (String string) { |
| 155 | 778 super.setToolTipText (string); |
| 779 appToolTipText = super.getToolTipText(); | |
| 780 } | |
| 781 /** | |
| 782 * Shorten the given text <code>t</code> so that its length doesn't exceed | |
| 783 * the given width. The default implementation replaces characters in the | |
| 784 * center of the original string with an ellipsis ("..."). | |
| 785 * Override if you need a different strategy. | |
| 786 * | |
| 787 * @param gc the gc to use for text measurement | |
| 788 * @param t the text to shorten | |
| 789 * @param width the width to shorten the text to, in pixels | |
| 790 * @return the shortened text | |
| 791 */ | |
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792 protected String shortenText(GC gc, String t, int width) { |
| 155 | 793 if (t is null) return null; |
| 794 int w = gc.textExtent(ELLIPSIS, DRAW_FLAGS).x; | |
| 795 if (width<=w) return t; | |
| 796 int l = t.length; | |
| 797 int max = l/2; | |
| 798 int min = 0; | |
| 799 int mid = (max+min)/2 - 1; | |
| 800 if (mid <= 0) return t; | |
| 213 | 801 TextLayout layout = new TextLayout (getDisplay()); |
| 802 layout.setText(t); | |
| 803 mid = validateOffset(layout, mid); | |
| 155 | 804 while (min < mid && mid < max) { |
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805 String s1 = t[0 .. mid].dup; |
| 213 | 806 String s2 = t.substring(validateOffset(layout, l-mid), l); |
| 155 | 807 int l1 = gc.textExtent(s1, DRAW_FLAGS).x; |
| 808 int l2 = gc.textExtent(s2, DRAW_FLAGS).x; | |
| 809 if (l1+w+l2 > width) { | |
| 810 max = mid; | |
| 213 | 811 mid = validateOffset(layout, (max+min)/2); |
| 155 | 812 } else if (l1+w+l2 < width) { |
| 813 min = mid; | |
| 213 | 814 mid = validateOffset(layout, (max+min)/2); |
| 155 | 815 } else { |
| 816 min = max; | |
| 817 } | |
| 818 } | |
| 213 | 819 String result = mid is 0 ? t : t.substring(0, mid) ~ ELLIPSIS ~ t.substring(validateOffset(layout, l-mid), l); |
| 820 layout.dispose(); | |
| 821 return result; | |
| 155 | 822 } |
| 213 | 823 int validateOffset(TextLayout layout, int offset) { |
| 824 int nextOffset = layout.getNextOffset(offset, DWT.MOVEMENT_CLUSTER); | |
| 825 if (nextOffset !is offset) return layout.getPreviousOffset(nextOffset, DWT.MOVEMENT_CLUSTER); | |
| 826 return offset; | |
| 827 } | |
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828 private String[] splitString(String text) { |
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829 String[] lines = new String[1]; |
| 155 | 830 int start = 0, pos; |
| 831 do { | |
| 832 pos = tango.text.Util.locate( text, '\n', start); | |
| 833 if (pos is text.length ) { | |
| 834 lines[lines.length - 1] = text[start .. $ ]; | |
| 835 } else { | |
| 836 bool crlf = (pos > 0) && (text[ pos - 1 ] is '\r'); | |
| 837 lines[lines.length - 1] = text[ start .. pos - (crlf ? 1 : 0)]; | |
| 838 start = pos + 1; | |
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839 String[] newLines = new String[lines.length+1]; |
| 155 | 840 System.arraycopy(lines, 0, newLines, 0, lines.length); |
| 841 lines = newLines; | |
| 842 } | |
| 843 } while (pos !is text.length); | |
| 844 return lines; | |
| 845 } | |
| 846 } |