Mercurial > projects > dwt-linux
annotate dwt/widgets/Canvas.d @ 322:96b14a31d9b3
Added missing dwthelper.utils imports. (catched by llvmdc)
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Mon, 06 Oct 2008 21:02:12 +0200 |
| parents | c0d810de7093 |
| children |
| rev | line source |
|---|---|
| 72 | 1 /******************************************************************************* |
| 259 | 2 * Copyright (c) 2000, 2008 IBM Corporation and others. |
| 37 | 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 | |
| 72 | 10 * Port to the D programming language: |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 37 | 12 *******************************************************************************/ |
| 13 module dwt.widgets.Canvas; | |
| 14 | |
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15 import dwt.dwthelper.utils; |
| 37 | 16 import dwt.graphics.Point; |
| 17 import dwt.internal.gtk.OS; | |
| 71 | 18 import dwt.DWT; |
| 37 | 19 import dwt.widgets.Composite; |
| 20 import dwt.widgets.Caret; | |
| 21 import dwt.widgets.Control; | |
| 240 | 22 import dwt.widgets.IME; |
| 37 | 23 import dwt.graphics.GC; |
| 24 import dwt.graphics.Rectangle; | |
| 25 import dwt.graphics.Font; | |
| 26 | |
| 27 /** | |
| 28 * Instances of this class provide a surface for drawing | |
| 29 * arbitrary graphics. | |
| 30 * <dl> | |
| 31 * <dt><b>Styles:</b></dt> | |
| 32 * <dd>(none)</dd> | |
| 33 * <dt><b>Events:</b></dt> | |
| 34 * <dd>(none)</dd> | |
| 35 * </dl> | |
| 36 * <p> | |
| 37 * This class may be subclassed by custom control implementors | |
| 38 * who are building controls that are <em>not</em> constructed | |
| 39 * from aggregates of other controls. That is, they are either | |
| 71 | 40 * painted using DWT graphics calls or are handled by native |
| 37 | 41 * methods. |
| 42 * </p> | |
| 43 * | |
| 44 * @see Composite | |
| 259 | 45 * @see <a href="http://www.eclipse.org/swt/snippets/#canvas">Canvas snippets</a> |
| 46 * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Example: ControlExample</a> | |
| 47 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> | |
| 37 | 48 */ |
| 49 public class Canvas : Composite { | |
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50 |
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51 alias Composite.setBounds setBounds; |
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52 |
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53 Caret caret; |
| 240 | 54 IME ime; |
| 37 | 55 |
| 56 this () {} | |
| 57 | |
| 58 /** | |
| 59 * Constructs a new instance of this class given its parent | |
| 60 * and a style value describing its behavior and appearance. | |
| 61 * <p> | |
| 62 * The style value is either one of the style constants defined in | |
| 71 | 63 * class <code>DWT</code> which is applicable to instances of this |
| 37 | 64 * class, or must be built by <em>bitwise OR</em>'ing together |
| 65 * (that is, using the <code>int</code> "|" operator) two or more | |
| 71 | 66 * of those <code>DWT</code> style constants. The class description |
| 37 | 67 * lists the style constants that are applicable to the class. |
| 68 * Style bits are also inherited from superclasses. | |
| 69 * </p> | |
| 70 * | |
| 71 * @param parent a composite control which will be the parent of the new instance (cannot be null) | |
| 72 * @param style the style of control to construct | |
| 73 * | |
| 74 * @exception IllegalArgumentException <ul> | |
| 75 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> | |
| 76 * </ul> | |
| 71 | 77 * @exception DWTException <ul> |
| 37 | 78 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| 79 * </ul> | |
| 80 * | |
| 71 | 81 * @see DWT |
| 37 | 82 * @see Widget#checkSubclass |
| 83 * @see Widget#getStyle | |
| 84 */ | |
| 85 public this (Composite parent, int style) { | |
| 240 | 86 super (parent, checkStyle (style)); |
| 37 | 87 } |
| 88 | |
| 89 /** | |
| 90 * Fills the interior of the rectangle specified by the arguments, | |
| 91 * with the receiver's background. | |
| 92 * | |
| 93 * @param gc the gc where the rectangle is to be filled | |
| 94 * @param x the x coordinate of the rectangle to be filled | |
| 95 * @param y the y coordinate of the rectangle to be filled | |
| 96 * @param width the width of the rectangle to be filled | |
| 97 * @param height the height of the rectangle to be filled | |
| 98 * | |
| 99 * @exception IllegalArgumentException <ul> | |
| 100 * <li>ERROR_NULL_ARGUMENT - if the gc is null</li> | |
| 101 * <li>ERROR_INVALID_ARGUMENT - if the gc has been disposed</li> | |
| 102 * </ul> | |
| 71 | 103 * @exception DWTException <ul> |
| 37 | 104 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 105 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 106 * </ul> | |
| 107 * | |
| 108 * @since 3.2 | |
| 109 */ | |
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110 override public void drawBackground (GC gc, int x, int y, int width, int height) { |
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111 checkWidget (); |
| 71 | 112 if (gc is null) error (DWT.ERROR_NULL_ARGUMENT); |
| 113 if (gc.isDisposed ()) error (DWT.ERROR_INVALID_ARGUMENT); | |
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114 super.drawBackground (gc, x, y, width, height); |
| 37 | 115 } |
| 116 | |
| 117 /** | |
| 118 * Returns the caret. | |
| 119 * <p> | |
| 120 * The caret for the control is automatically hidden | |
| 121 * and shown when the control is painted or resized, | |
| 122 * when focus is gained or lost and when an the control | |
| 123 * is scrolled. To avoid drawing on top of the caret, | |
| 124 * the programmer must hide and show the caret when | |
| 125 * drawing in the window any other time. | |
| 126 * </p> | |
| 127 * | |
| 259 | 128 * @return the caret for the receiver, may be null |
| 37 | 129 * |
| 71 | 130 * @exception DWTException <ul> |
| 37 | 131 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 132 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 133 * </ul> | |
| 134 */ | |
| 135 public Caret getCaret () { | |
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136 checkWidget(); |
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137 return caret; |
| 37 | 138 } |
| 139 | |
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140 override Point getIMCaretPos () { |
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141 if (caret is null) return super.getIMCaretPos (); |
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142 return new Point (caret.x, caret.y); |
| 37 | 143 } |
| 144 | |
| 259 | 145 /** |
| 146 * Returns the IME. | |
| 147 * | |
| 148 * @return the IME | |
| 149 * | |
| 150 * @exception DWTException <ul> | |
| 151 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 152 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 153 * </ul> | |
| 154 * | |
| 155 * @since 3.4 | |
| 156 */ | |
| 240 | 157 public IME getIME () { |
| 158 checkWidget (); | |
| 159 return ime; | |
| 160 } | |
| 161 | |
| 162 override int /*long*/ gtk_button_press_event (GtkWidget* widget, GdkEventButton* event) { | |
| 163 if (ime !is null) { | |
| 164 auto result = ime.gtk_button_press_event (widget, event); | |
| 165 if (result !is 0) return result; | |
| 166 } | |
| 167 return super.gtk_button_press_event (widget, event); | |
| 168 } | |
| 169 | |
| 170 override int /*long*/ gtk_commit (GtkIMContext* imcontext, char* text) { | |
| 171 if (ime !is null) { | |
| 172 auto result = ime.gtk_commit (imcontext, text); | |
| 173 if (result !is 0) return result; | |
| 174 } | |
| 175 return super.gtk_commit (imcontext, text); | |
| 176 } | |
| 177 | |
| 37 | 178 override int /*long*/ gtk_expose_event (GtkWidget* widget, GdkEventExpose* event) { |
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179 if ((state & OBSCURED) !is 0) return 0; |
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180 bool isFocus = caret !is null && caret.isFocusCaret (); |
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181 if (isFocus) caret.killFocus (); |
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182 auto result = super.gtk_expose_event (widget, event); |
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183 if (isFocus) caret.setFocus (); |
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184 return result; |
| 37 | 185 } |
| 186 | |
| 187 override int /*long*/ gtk_focus_in_event (GtkWidget* widget, GdkEventFocus* event) { | |
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188 auto result = super.gtk_focus_in_event (widget, event); |
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189 if (caret !is null) caret.setFocus (); |
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190 return result; |
| 37 | 191 } |
| 192 | |
| 193 override int /*long*/ gtk_focus_out_event (GtkWidget* widget, GdkEventFocus* event) { | |
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194 auto result = super.gtk_focus_out_event (widget, event); |
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195 if (caret !is null) caret.killFocus (); |
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196 return result; |
| 37 | 197 } |
| 198 | |
| 240 | 199 override int /*long*/ gtk_preedit_changed (GtkIMContext* imcontext) { |
| 200 if (ime !is null) { | |
| 201 auto result = ime.gtk_preedit_changed (imcontext); | |
| 202 if (result !is 0) return result; | |
| 203 } | |
| 204 return super.gtk_preedit_changed (imcontext); | |
| 205 } | |
| 206 | |
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207 override void redrawWidget (int x, int y, int width, int height, bool redrawAll, bool all, bool trim) { |
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208 bool isFocus = caret !is null && caret.isFocusCaret (); |
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209 if (isFocus) caret.killFocus (); |
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210 super.redrawWidget (x, y, width, height, redrawAll, all, trim); |
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211 if (isFocus) caret.setFocus (); |
| 37 | 212 } |
| 213 | |
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214 override void releaseChildren (bool destroy) { |
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215 if (caret !is null) { |
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216 caret.release (false); |
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217 caret = null; |
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218 } |
| 240 | 219 if (ime !is null) { |
| 220 ime.release (false); | |
| 221 ime = null; | |
| 222 } | |
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223 super.releaseChildren (destroy); |
| 37 | 224 } |
| 225 | |
| 226 /** | |
| 227 * Scrolls a rectangular area of the receiver by first copying | |
| 228 * the source area to the destination and then causing the area | |
| 229 * of the source which is not covered by the destination to | |
| 230 * be repainted. Children that intersect the rectangle are | |
| 231 * optionally moved during the operation. In addition, outstanding | |
| 232 * paint events are flushed before the source area is copied to | |
| 233 * ensure that the contents of the canvas are drawn correctly. | |
| 234 * | |
| 235 * @param destX the x coordinate of the destination | |
| 236 * @param destY the y coordinate of the destination | |
| 237 * @param x the x coordinate of the source | |
| 238 * @param y the y coordinate of the source | |
| 239 * @param width the width of the area | |
| 240 * @param height the height of the area | |
| 241 * @param all <code>true</code>if children should be scrolled, and <code>false</code> otherwise | |
| 242 * | |
| 71 | 243 * @exception DWTException <ul> |
| 37 | 244 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| 245 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 246 * </ul> | |
| 247 */ | |
| 248 public void scroll (int destX, int destY, int x, int y, int width, int height, bool all) { | |
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249 checkWidget(); |
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250 if (width <= 0 || height <= 0) return; |
| 240 | 251 if ((style & DWT.MIRRORED) !is 0) { |
| 252 int clientWidth = getClientWidth (); | |
| 253 x = clientWidth - width - x; | |
| 254 destX = clientWidth - width - destX; | |
| 255 } | |
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256 int deltaX = destX - x, deltaY = destY - y; |
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257 if (deltaX is 0 && deltaY is 0) return; |
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258 if (!isVisible ()) return; |
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259 bool isFocus = caret !is null && caret.isFocusCaret (); |
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260 if (isFocus) caret.killFocus (); |
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261 auto window = paintWindow (); |
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262 auto visibleRegion = OS.gdk_drawable_get_visible_region (window); |
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263 GdkRectangle* srcRect = new GdkRectangle (); |
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264 srcRect.x = x; |
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265 srcRect.y = y; |
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266 srcRect.width = width; |
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267 srcRect.height = height; |
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268 auto copyRegion = OS.gdk_region_rectangle (srcRect); |
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269 OS.gdk_region_intersect(copyRegion, visibleRegion); |
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270 auto invalidateRegion = OS.gdk_region_rectangle (srcRect); |
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271 OS.gdk_region_subtract (invalidateRegion, visibleRegion); |
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272 OS.gdk_region_offset (invalidateRegion, deltaX, deltaY); |
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273 GdkRectangle* copyRect = new GdkRectangle(); |
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274 OS.gdk_region_get_clipbox (copyRegion, copyRect); |
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275 if (copyRect.width !is 0 && copyRect.height !is 0) { |
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276 update (); |
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277 } |
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278 Control control = findBackgroundControl (); |
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279 if (control is null) control = this; |
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280 if (control.backgroundImage !is null) { |
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281 redrawWidget (x, y, width, height, false, false, false); |
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282 redrawWidget (destX, destY, width, height, false, false, false); |
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283 } else { |
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284 // GC gc = new GC (this); |
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285 // gc.copyArea (x, y, width, height, destX, destY); |
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286 // gc.dispose (); |
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287 auto gdkGC = OS.gdk_gc_new (window); |
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288 OS.gdk_gc_set_exposures (gdkGC, true); |
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289 OS.gdk_draw_drawable (window, gdkGC, window, copyRect.x, copyRect.y, copyRect.x + deltaX, copyRect.y + deltaY, copyRect.width, copyRect.height); |
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290 OS.g_object_unref (gdkGC); |
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291 bool disjoint = (destX + width < x) || (x + width < destX) || (destY + height < y) || (y + height < destY); |
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292 if (disjoint) { |
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293 GdkRectangle* rect = new GdkRectangle (); |
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294 rect.x = x; |
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295 rect.y = y; |
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296 rect.width = width; |
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297 rect.height = height; |
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298 OS.gdk_region_union_with_rect (invalidateRegion, rect); |
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299 } else { |
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300 GdkRectangle* rect = new GdkRectangle (); |
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301 if (deltaX !is 0) { |
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302 int newX = destX - deltaX; |
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303 if (deltaX < 0) newX = destX + width; |
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304 rect.x = newX; |
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305 rect.y = y; |
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306 rect.width = Math.abs(deltaX); |
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307 rect.height = height; |
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308 OS.gdk_region_union_with_rect (invalidateRegion, rect); |
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309 } |
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310 if (deltaY !is 0) { |
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311 int newY = destY - deltaY; |
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312 if (deltaY < 0) newY = destY + height; |
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313 rect.x = x; |
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314 rect.y = newY; |
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315 rect.width = width; |
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316 rect.height = Math.abs(deltaY); |
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317 OS.gdk_region_union_with_rect (invalidateRegion, rect); |
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318 } |
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319 } |
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320 OS.gdk_window_invalidate_region(window, invalidateRegion, all); |
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321 OS.gdk_region_destroy (visibleRegion); |
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322 OS.gdk_region_destroy (copyRegion); |
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323 OS.gdk_region_destroy (invalidateRegion); |
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324 } |
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325 if (all) { |
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326 Control [] children = _getChildren (); |
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327 for (int i=0; i<children.length; i++) { |
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328 Control child = children [i]; |
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329 Rectangle rect = child.getBounds (); |
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330 if (Math.min(x + width, rect.x + rect.width) >= Math.max (x, rect.x) && |
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331 Math.min(y + height, rect.y + rect.height) >= Math.max (y, rect.y)) { |
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332 child.setLocation (rect.x + deltaX, rect.y + deltaY); |
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333 } |
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334 } |
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335 } |
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336 if (isFocus) caret.setFocus (); |
| 37 | 337 } |
| 338 | |
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339 override int setBounds (int x, int y, int width, int height, bool move, bool resize) { |
|
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340 bool isFocus = caret !is null && caret.isFocusCaret (); |
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341 if (isFocus) caret.killFocus (); |
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342 int result = super.setBounds (x, y, width, height, move, resize); |
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343 if (isFocus) caret.setFocus (); |
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344 return result; |
| 37 | 345 } |
| 346 | |
| 347 /** | |
| 348 * Sets the receiver's caret. | |
| 349 * <p> | |
| 350 * The caret for the control is automatically hidden | |
| 351 * and shown when the control is painted or resized, | |
| 352 * when focus is gained or lost and when an the control | |
| 353 * is scrolled. To avoid drawing on top of the caret, | |
| 354 * the programmer must hide and show the caret when | |
| 355 * drawing in the window any other time. | |
| 356 * </p> | |
| 357 * @param caret the new caret for the receiver, may be null | |
| 358 * | |
| 359 * @exception IllegalArgumentException <ul> | |
| 360 * <li>ERROR_INVALID_ARGUMENT - if the caret has been disposed</li> | |
| 361 * </ul> | |
| 71 | 362 * @exception DWTException <ul> |
| 37 | 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 void setCaret (Caret caret) { | |
|
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368 checkWidget(); |
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369 Caret newCaret = caret; |
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370 Caret oldCaret = this.caret; |
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371 this.caret = newCaret; |
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372 if (hasFocus ()) { |
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373 if (oldCaret !is null) oldCaret.killFocus (); |
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374 if (newCaret !is null) { |
| 71 | 375 if (newCaret.isDisposed()) error(DWT.ERROR_INVALID_ARGUMENT); |
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376 newCaret.setFocus (); |
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377 } |
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378 } |
| 37 | 379 } |
| 380 | |
|
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381 override public void setFont (Font font) { |
|
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382 checkWidget(); |
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383 if (caret !is null) caret.setFont (font); |
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384 super.setFont (font); |
| 37 | 385 } |
| 386 | |
| 259 | 387 /** |
| 388 * Sets the receiver's IME. | |
| 389 * | |
| 390 * @param ime the new IME for the receiver, may be null | |
| 391 * | |
| 392 * @exception IllegalArgumentException <ul> | |
| 393 * <li>ERROR_INVALID_ARGUMENT - if the IME has been disposed</li> | |
| 394 * </ul> | |
| 395 * @exception DWTException <ul> | |
| 396 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 397 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 398 * </ul> | |
| 399 * | |
| 400 * @since 3.4 | |
| 401 */ | |
| 240 | 402 public void setIME (IME ime) { |
| 403 checkWidget (); | |
| 404 if (ime !is null && ime.isDisposed()) error(DWT.ERROR_INVALID_ARGUMENT); | |
| 405 this.ime = ime; | |
| 406 } | |
| 407 | |
| 37 | 408 void updateCaret () { |
|
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409 auto imHandle = imHandle (); |
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410 if (imHandle is null) return; |
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411 GdkRectangle* rect = new GdkRectangle (); |
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412 rect.x = caret.x; |
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413 rect.y = caret.y; |
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414 rect.width = caret.width; |
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415 rect.height = caret.height; |
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changeset
|
416 OS.gtk_im_context_set_cursor_location (imHandle, rect); |
| 37 | 417 } |
| 418 | |
| 419 } |