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annotate org.eclipse.swt.gtk.linux.x86/src/org/eclipse/swt/dnd/DropTarget.d @ 47:65761bc28ab2
swt linux again compilable for d1.
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Fri, 27 Mar 2009 11:43:53 +0100 |
| parents | f713da8bc051 |
| children | ddbfe84d86df |
| rev | line source |
|---|---|
| 25 | 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.dnd.DropTarget; | |
| 14 | |
| 15 | |
| 16 | |
| 17 import org.eclipse.swt.SWT; | |
| 18 import org.eclipse.swt.SWTError; | |
| 19 import org.eclipse.swt.SWTException; | |
| 20 import org.eclipse.swt.graphics.Point; | |
| 21 import org.eclipse.swt.internal.gtk.OS; | |
| 22 import org.eclipse.swt.widgets.Combo; | |
| 23 import org.eclipse.swt.widgets.Control; | |
| 24 import org.eclipse.swt.widgets.Display; | |
| 25 import org.eclipse.swt.widgets.Event; | |
| 26 import org.eclipse.swt.widgets.Listener; | |
| 27 import org.eclipse.swt.widgets.Table; | |
| 28 import org.eclipse.swt.widgets.Tree; | |
| 29 import org.eclipse.swt.widgets.Widget; | |
| 30 import org.eclipse.swt.dnd.DND; | |
| 31 import org.eclipse.swt.dnd.Transfer; | |
| 32 import org.eclipse.swt.dnd.DropTargetEffect; | |
| 33 import org.eclipse.swt.dnd.DNDEvent; | |
| 34 import org.eclipse.swt.dnd.DNDListener; | |
| 35 import org.eclipse.swt.dnd.TransferData; | |
| 36 import org.eclipse.swt.dnd.DropTargetListener; | |
| 37 import org.eclipse.swt.dnd.TableDropTargetEffect; | |
| 38 import org.eclipse.swt.dnd.TreeDropTargetEffect; | |
| 39 import java.lang.all; | |
| 40 | |
|
47
65761bc28ab2
swt linux again compilable for d1.
Frank Benoit <benoit@tionex.de>
parents:
25
diff
changeset
|
41 import java.lang.Thread; |
| 25 | 42 static import tango.stdc.string; |
| 43 | |
| 44 /** | |
| 45 * | |
| 46 * Class <code>DropTarget</code> defines the target object for a drag and drop transfer. | |
| 47 * | |
| 48 * IMPORTANT: This class is <em>not</em> intended to be subclassed. | |
| 49 * | |
| 50 * <p>This class identifies the <code>Control</code> over which the user must position the cursor | |
| 51 * in order to drop the data being transferred. It also specifies what data types can be dropped on | |
| 52 * this control and what operations can be performed. You may have several DropTragets in an | |
| 53 * application but there can only be a one to one mapping between a <code>Control</code> and a <code>DropTarget</code>. | |
| 54 * The DropTarget can receive data from within the same application or from other applications | |
| 55 * (such as text dragged from a text editor like Word).</p> | |
| 56 * | |
| 57 * <code><pre> | |
| 58 * int operations = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK; | |
| 59 * Transfer[] types = new Transfer[] {TextTransfer.getInstance()}; | |
| 60 * DropTarget target = new DropTarget(label, operations); | |
| 61 * target.setTransfer(types); | |
| 62 * </code></pre> | |
| 63 * | |
| 64 * <p>The application is notified of data being dragged over this control and of when a drop occurs by | |
| 65 * implementing the interface <code>DropTargetListener</code> which uses the class | |
| 66 * <code>DropTargetEvent</code>. The application can modify the type of drag being performed | |
| 67 * on this Control at any stage of the drag by modifying the <code>event.detail</code> field or the | |
| 68 * <code>event.currentDataType</code> field. When the data is dropped, it is the responsibility of | |
| 69 * the application to copy this data for its own purposes. | |
| 70 * | |
| 71 * <code><pre> | |
| 72 * target.addDropListener (new DropTargetListener() { | |
| 73 * public void dragEnter(DropTargetEvent event) {}; | |
| 74 * public void dragOver(DropTargetEvent event) {}; | |
| 75 * public void dragLeave(DropTargetEvent event) {}; | |
| 76 * public void dragOperationChanged(DropTargetEvent event) {}; | |
| 77 * public void dropAccept(DropTargetEvent event) {} | |
| 78 * public void drop(DropTargetEvent event) { | |
| 79 * // A drop has occurred, copy over the data | |
| 80 * if (event.data is null) { // no data to copy, indicate failure in event.detail | |
| 81 * event.detail = DND.DROP_NONE; | |
| 82 * return; | |
| 83 * } | |
| 84 * label.setText ((String) event.data); // data copied to label text | |
| 85 * } | |
| 86 * }); | |
| 87 * </pre></code> | |
| 88 * | |
| 89 * <dl> | |
| 90 * <dt><b>Styles</b></dt> <dd>DND.DROP_NONE, DND.DROP_COPY, DND.DROP_MOVE, DND.DROP_LINK</dd> | |
| 91 * <dt><b>Events</b></dt> <dd>DND.DragEnter, DND.DragLeave, DND.DragOver, DND.DragOperationChanged, | |
| 92 * DND.DropAccept, DND.Drop </dd> | |
| 93 * </dl> | |
| 94 * | |
| 95 * @see <a href="http://www.eclipse.org/swt/snippets/#dnd">Drag and Drop snippets</a> | |
| 96 * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: DNDExample</a> | |
| 97 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> | |
| 98 */ | |
| 99 public class DropTarget : Widget { | |
| 100 | |
| 101 Control control; | |
| 102 Listener controlListener; | |
| 103 Transfer[] transferAgents; | |
| 104 DropTargetEffect dropEffect; | |
| 105 | |
| 106 // Track application selections | |
| 107 TransferData selectedDataType; | |
| 108 int selectedOperation; | |
| 109 | |
| 110 // workaround - There is no event for "operation changed" so track operation based on key state | |
| 111 int keyOperation = -1; | |
| 112 | |
| 113 // workaround - Simulate events when the mouse is not moving | |
| 114 long dragOverStart; | |
| 115 Runnable dragOverHeartbeat; | |
| 116 DNDEvent dragOverEvent; | |
| 117 | |
| 118 int drag_motion_handler; | |
| 119 int drag_leave_handler; | |
| 120 int drag_data_received_handler; | |
| 121 int drag_drop_handler; | |
| 122 | |
| 123 static const String DEFAULT_DROP_TARGET_EFFECT = "DEFAULT_DROP_TARGET_EFFECT"; //$NON-NLS-1$ | |
| 124 static const int DRAGOVER_HYSTERESIS = 50; | |
| 125 | |
| 126 // static Callback Drag_Motion; | |
| 127 // static Callback Drag_Leave; | |
| 128 // static Callback Drag_Data_Received; | |
| 129 // static Callback Drag_Drop; | |
| 130 // | |
| 131 // static this(){ | |
| 132 // Drag_Motion = new Callback(DropTarget.class, "Drag_Motion", 5); //$NON-NLS-1$ | |
| 133 // if (Drag_Motion.getAddress() is 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); | |
| 134 // Drag_Leave = new Callback(DropTarget.class, "Drag_Leave", 3); //$NON-NLS-1$ | |
| 135 // if (Drag_Leave.getAddress() is 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); | |
| 136 // Drag_Data_Received = new Callback(DropTarget.class, "Drag_Data_Received", 7); //$NON-NLS-1$ | |
| 137 // if (Drag_Data_Received.getAddress() is 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); | |
| 138 // Drag_Drop = new Callback(DropTarget.class, "Drag_Drop", 5); //$NON-NLS-1$ | |
| 139 // if (Drag_Drop.getAddress() is 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); | |
| 140 // } | |
| 141 | |
| 142 /** | |
| 143 * Creates a new <code>DropTarget</code> to allow data to be dropped on the specified | |
| 144 * <code>Control</code>. | |
| 145 * Creating an instance of a DropTarget may cause system resources to be allocated | |
| 146 * depending on the platform. It is therefore mandatory that the DropTarget instance | |
| 147 * be disposed when no longer required. | |
| 148 * | |
| 149 * @param control the <code>Control</code> over which the user positions the cursor to drop the data | |
| 150 * @param style the bitwise OR'ing of allowed operations; this may be a combination of any of | |
| 151 * DND.DROP_NONE, DND.DROP_COPY, DND.DROP_MOVE, DND.DROP_LINK | |
| 152 * | |
| 153 * @exception SWTException <ul> | |
| 154 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> | |
| 155 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> | |
| 156 * </ul> | |
| 157 * @exception SWTError <ul> | |
| 158 * <li>ERROR_CANNOT_INIT_DROP - unable to initiate drop target; this will occur if more than one | |
| 159 * drop target is created for a control or if the operating system will not allow the creation | |
| 160 * of the drop target</li> | |
| 161 * </ul> | |
| 162 * | |
| 163 * <p>NOTE: ERROR_CANNOT_INIT_DROP should be an SWTException, since it is a | |
| 164 * recoverable error, but can not be changed due to backward compatibility.</p> | |
| 165 * | |
| 166 * @see Widget#dispose | |
| 167 * @see DropTarget#checkSubclass | |
| 168 * @see DND#DROP_NONE | |
| 169 * @see DND#DROP_COPY | |
| 170 * @see DND#DROP_MOVE | |
| 171 * @see DND#DROP_LINK | |
| 172 */ | |
| 173 public this(Control control, int style) { | |
| 174 super(control, checkStyle(style)); | |
| 175 this.control = control; | |
| 176 // if (Drag_Motion is null || Drag_Leave is null || Drag_Data_Received is null || Drag_Drop is null) { | |
| 177 // DND.error(DND.ERROR_CANNOT_INIT_DROP); | |
| 178 // } | |
| 179 if (control.getData(DND.DROP_TARGET_KEY) !is null) { | |
| 180 DND.error(DND.ERROR_CANNOT_INIT_DROP); | |
| 181 } | |
| 182 control.setData(DND.DROP_TARGET_KEY, this); | |
| 183 | |
| 184 drag_motion_handler = OS.g_signal_connect(control.handle, OS.drag_motion.ptr, cast(GCallback)&Drag_Motion, null); | |
| 185 drag_leave_handler = OS.g_signal_connect(control.handle, OS.drag_leave.ptr, cast(GCallback)&Drag_Leave, null); | |
| 186 drag_data_received_handler = OS.g_signal_connect(control.handle, OS.drag_data_received.ptr, cast(GCallback)&Drag_Data_Received, null); | |
| 187 drag_drop_handler = OS.g_signal_connect(control.handle, OS.drag_drop.ptr, cast(GCallback)&Drag_Drop, null); | |
| 188 | |
| 189 // Dispose listeners | |
| 190 controlListener = new class() Listener{ | |
| 191 public void handleEvent(Event event){ | |
| 192 if (!this.outer.isDisposed()){ | |
| 193 this.outer.dispose(); | |
| 194 } | |
| 195 } | |
| 196 }; | |
| 197 control.addListener(SWT.Dispose, controlListener); | |
| 198 | |
| 199 this.addListener(SWT.Dispose, new class() Listener { | |
| 200 public void handleEvent(Event event){ | |
| 201 onDispose(); | |
| 202 } | |
| 203 }); | |
| 204 | |
| 205 Object effect = control.getData(DEFAULT_DROP_TARGET_EFFECT); | |
| 206 if ( auto de = cast(DropTargetEffect)effect ) { | |
| 207 dropEffect = de; | |
| 208 } else if ( auto table = cast(Table)control ) { | |
| 209 dropEffect = new TableDropTargetEffect(table); | |
| 210 } else if ( auto tree = cast(Tree) control ) { | |
| 211 dropEffect = new TreeDropTargetEffect(tree); | |
| 212 } | |
| 213 | |
| 214 dragOverHeartbeat = new class() Runnable { | |
| 215 public void run() { | |
| 216 Control control = this.outer.control; | |
| 217 if (control is null || control.isDisposed() || dragOverStart is 0) return; | |
| 218 long time = System.currentTimeMillis(); | |
| 219 int delay = DRAGOVER_HYSTERESIS; | |
| 220 if (time < dragOverStart) { | |
| 221 delay = cast(int)(dragOverStart - time); | |
| 222 } else { | |
| 223 dragOverEvent.time += DRAGOVER_HYSTERESIS; | |
| 224 int allowedOperations = dragOverEvent.operations; | |
| 225 TransferData[] allowedTypes = dragOverEvent.dataTypes; | |
| 226 //pass a copy of data types in to listeners in case application modifies it | |
| 227 TransferData[] dataTypes = new TransferData[allowedTypes.length]; | |
| 228 System.arraycopy(allowedTypes, 0, dataTypes, 0, dataTypes.length); | |
| 229 | |
| 230 DNDEvent event = new DNDEvent(); | |
| 231 event.widget = dragOverEvent.widget; | |
| 232 event.x = dragOverEvent.x; | |
| 233 event.y = dragOverEvent.y; | |
| 234 event.time = dragOverEvent.time; | |
| 235 event.feedback = DND.FEEDBACK_SELECT; | |
| 236 event.dataTypes = dataTypes; | |
| 237 event.dataType = selectedDataType; | |
| 238 event.operations = dragOverEvent.operations; | |
| 239 event.detail = selectedOperation; | |
| 240 if (dropEffect !is null) { | |
| 241 event.item = dropEffect.getItem(dragOverEvent.x, dragOverEvent.y); | |
| 242 } | |
| 243 selectedDataType = null; | |
| 244 selectedOperation = DND.DROP_NONE; | |
| 245 notifyListeners(DND.DragOver, event); | |
| 246 if (event.dataType !is null) { | |
| 247 for (int i = 0; i < allowedTypes.length; i++) { | |
| 248 if (allowedTypes[i].type is event.dataType.type) { | |
| 249 selectedDataType = event.dataType; | |
| 250 break; | |
| 251 } | |
| 252 } | |
| 253 } | |
| 254 if (selectedDataType !is null && (event.detail & allowedOperations) !is 0) { | |
| 255 selectedOperation = event.detail; | |
| 256 } | |
| 257 } | |
| 258 control = this.outer.control; | |
| 259 if (control is null || control.isDisposed()) return; | |
| 260 control.getDisplay().timerExec(delay, dragOverHeartbeat); | |
| 261 } | |
| 262 }; | |
| 263 } | |
| 264 | |
| 265 static int checkStyle (int style) { | |
| 266 if (style is SWT.NONE) return DND.DROP_MOVE; | |
| 267 return style; | |
| 268 } | |
| 269 | |
| 270 private static extern(C) void Drag_Data_Received ( | |
| 271 GtkWidget *widget, | |
| 272 GdkDragContext *context, | |
| 273 int x, | |
| 274 int y, | |
| 275 GtkSelectionData *data, | |
| 276 uint info, | |
| 277 uint time, | |
| 278 void* user_data) | |
| 279 { | |
| 280 DropTarget target = FindDropTarget(widget); | |
| 281 if (target is null) return; | |
| 282 target.drag_data_received (widget, context, cast(int)/*64*/x, cast(int)/*64*/y, data, cast(int)/*64*/info, cast(int)/*64*/time); | |
| 283 } | |
| 284 | |
| 285 private static extern(C) int Drag_Drop( | |
| 286 GtkWidget *widget, | |
| 287 GdkDragContext *context, | |
| 288 int x, | |
| 289 int y, | |
| 290 uint time, | |
| 291 void* user_data) | |
| 292 { | |
| 293 DropTarget target = FindDropTarget(widget); | |
| 294 if (target is null) return 0; | |
| 295 return target.drag_drop (widget, context, cast(int)/*64*/x, cast(int)/*64*/y, cast(int)/*64*/time) ? 1 : 0; | |
| 296 } | |
| 297 | |
| 298 private static extern(C) void Drag_Leave ( | |
| 299 GtkWidget *widget, | |
| 300 GdkDragContext *context, | |
| 301 uint time, | |
| 302 void* user_data) | |
| 303 { | |
| 304 DropTarget target = FindDropTarget(widget); | |
| 305 if (target is null) return; | |
| 306 target.drag_leave (widget, context, cast(int)/*64*/time); | |
| 307 } | |
| 308 | |
| 309 private static extern(C) int Drag_Motion ( | |
| 310 GtkWidget *widget, | |
| 311 GdkDragContext *context, | |
| 312 int x, | |
| 313 int y, | |
| 314 uint time, | |
| 315 void* user_data) | |
| 316 { | |
| 317 DropTarget target = FindDropTarget(widget); | |
| 318 if (target is null) return 0; | |
| 319 return target.drag_motion (widget, context, cast(int)/*64*/x, cast(int)/*64*/y, cast(int)/*64*/time) ? 1 : 0; | |
| 320 } | |
| 321 | |
| 322 static DropTarget FindDropTarget(GtkWidget* handle) { | |
|
47
65761bc28ab2
swt linux again compilable for d1.
Frank Benoit <benoit@tionex.de>
parents:
25
diff
changeset
|
323 Display display = Display.findDisplay(Thread.currentThread()); |
| 25 | 324 if (display is null || display.isDisposed()) return null; |
| 325 Widget widget = display.findWidget(handle); | |
| 326 if (widget is null) return null; | |
| 327 return cast(DropTarget)widget.getData(DND.DROP_TARGET_KEY); | |
| 328 } | |
| 329 | |
| 330 /** | |
| 331 * Adds the listener to the collection of listeners who will | |
| 332 * be notified when a drag and drop operation is in progress, by sending | |
| 333 * it one of the messages defined in the <code>DropTargetListener</code> | |
| 334 * interface. | |
| 335 * | |
| 336 * <p><ul> | |
| 337 * <li><code>dragEnter</code> is called when the cursor has entered the drop target boundaries | |
| 338 * <li><code>dragLeave</code> is called when the cursor has left the drop target boundaries and just before | |
| 339 * the drop occurs or is cancelled. | |
| 340 * <li><code>dragOperationChanged</code> is called when the operation being performed has changed | |
| 341 * (usually due to the user changing the selected modifier key(s) while dragging) | |
| 342 * <li><code>dragOver</code> is called when the cursor is moving over the drop target | |
| 343 * <li><code>dropAccept</code> is called just before the drop is performed. The drop target is given | |
| 344 * the chance to change the nature of the drop or veto the drop by setting the <code>event.detail</code> field | |
| 345 * <li><code>drop</code> is called when the data is being dropped | |
| 346 * </ul></p> | |
| 347 * | |
| 348 * @param listener the listener which should be notified | |
| 349 * | |
| 350 * @exception IllegalArgumentException <ul> | |
| 351 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
| 352 * </ul> | |
| 353 * @exception SWTException <ul> | |
| 354 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 355 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 356 * </ul> | |
| 357 * | |
| 358 * @see DropTargetListener | |
| 359 * @see #getDropListeners | |
| 360 * @see #removeDropListener | |
| 361 * @see DropTargetEvent | |
| 362 */ | |
| 363 public void addDropListener(DropTargetListener listener) { | |
| 364 if (listener is null) DND.error (SWT.ERROR_NULL_ARGUMENT); | |
| 365 DNDListener typedListener = new DNDListener (listener); | |
| 366 typedListener.dndWidget = this; | |
| 367 addListener (DND.DragEnter, typedListener); | |
| 368 addListener (DND.DragLeave, typedListener); | |
| 369 addListener (DND.DragOver, typedListener); | |
| 370 addListener (DND.DragOperationChanged, typedListener); | |
| 371 addListener (DND.Drop, typedListener); | |
| 372 addListener (DND.DropAccept, typedListener); | |
| 373 } | |
| 374 | |
| 375 protected override void checkSubclass () { | |
| 376 String name = this.classinfo.name; | |
| 377 String validName = DropTarget.classinfo.name; | |
| 378 if ( validName !=/*eq*/ name ) { | |
| 379 DND.error (SWT.ERROR_INVALID_SUBCLASS); | |
| 380 } | |
| 381 } | |
| 382 | |
| 383 void drag_data_received ( | |
| 384 GtkWidget *widget, | |
| 385 GdkDragContext *context, | |
| 386 int x, | |
| 387 int y, | |
| 388 GtkSelectionData *data, | |
| 389 uint info, | |
| 390 uint time ) | |
| 391 { | |
| 392 DNDEvent event = new DNDEvent(); | |
| 393 if (data is null || !setEventData(context, x, y, time, event)) { | |
| 394 keyOperation = -1; | |
| 395 return; | |
| 396 } | |
| 397 keyOperation = -1; | |
| 398 | |
| 399 int allowedOperations = event.operations; | |
| 400 | |
| 401 // Get data in a Java format | |
| 402 Object object = null; | |
| 403 TransferData transferData = new TransferData(); | |
| 404 if (data.data !is null) { | |
| 405 transferData.type = data.type; | |
| 406 transferData.length = data.length; | |
| 407 transferData.pValue = data.data; | |
| 408 transferData.format = data.format; | |
| 409 for (int i = 0; i < transferAgents.length; i++) { | |
| 410 Transfer transfer = transferAgents[i]; | |
| 411 if (transfer !is null && transfer.isSupportedType(transferData)) { | |
| 412 object = transfer.nativeToJava(transferData); | |
| 413 break; | |
| 414 } | |
| 415 } | |
| 416 } | |
| 417 if (object is null) { | |
| 418 selectedOperation = DND.DROP_NONE; | |
| 419 } | |
| 420 | |
| 421 event.detail = selectedOperation; | |
| 422 event.dataType = transferData; | |
| 423 event.data = object; | |
| 424 selectedOperation = DND.DROP_NONE; | |
| 425 notifyListeners(DND.Drop, event); | |
| 426 if ((allowedOperations & event.detail) is event.detail) { | |
| 427 selectedOperation = event.detail; | |
| 428 } | |
| 429 //stop native handler | |
| 430 OS.g_signal_stop_emission_by_name(widget, OS.drag_data_received.ptr); | |
| 431 | |
| 432 //notify source of action taken | |
| 433 OS.gtk_drag_finish(context, selectedOperation !is DND.DROP_NONE, selectedOperation is DND.DROP_MOVE, time); | |
| 434 return; | |
| 435 } | |
| 436 | |
| 437 bool drag_drop( | |
| 438 GtkWidget *widget, | |
| 439 GdkDragContext *context, | |
| 440 int x, | |
| 441 int y, | |
| 442 uint time) | |
| 443 { | |
| 444 DNDEvent event = new DNDEvent(); | |
| 445 if (!setEventData(context, x, y, time, event)) { | |
| 446 keyOperation = -1; | |
| 447 return false; | |
| 448 } | |
| 449 keyOperation = -1; | |
| 450 | |
| 451 int allowedOperations = event.operations; | |
| 452 TransferData[] allowedDataTypes = new TransferData[event.dataTypes.length]; | |
| 453 System.arraycopy(event.dataTypes, 0, allowedDataTypes, 0, allowedDataTypes.length); | |
| 454 | |
| 455 event.dataType = selectedDataType; | |
| 456 event.detail = selectedOperation; | |
| 457 selectedDataType = null; | |
| 458 selectedOperation = DND.DROP_NONE; | |
| 459 notifyListeners(DND.DropAccept,event); | |
| 460 if (event.dataType !is null) { | |
| 461 for (int i = 0; i < allowedDataTypes.length; i++) { | |
| 462 if (allowedDataTypes[i].type is event.dataType.type) { | |
| 463 selectedDataType = allowedDataTypes[i]; | |
| 464 break; | |
| 465 } | |
| 466 } | |
| 467 } | |
| 468 if (selectedDataType !is null && ((event.detail & allowedOperations) is event.detail)) { | |
| 469 selectedOperation = event.detail; | |
| 470 } | |
| 471 if (selectedOperation is DND.DROP_NONE) { | |
| 472 // this was not a successful drop | |
| 473 return false; | |
| 474 } | |
| 475 // ask drag source for dropped data | |
| 476 OS.gtk_drag_get_data(widget, context, selectedDataType.type, time); | |
| 477 return true; | |
| 478 } | |
| 479 | |
| 480 void drag_leave( | |
| 481 GtkWidget *widget, | |
| 482 GdkDragContext *context, | |
| 483 uint time ) | |
| 484 { | |
| 485 updateDragOverHover(0, null); | |
| 486 | |
| 487 if (keyOperation is -1) return; | |
| 488 keyOperation = -1; | |
| 489 | |
| 490 DNDEvent event = new DNDEvent(); | |
| 491 event.widget = this; | |
| 492 event.time = time; | |
| 493 event.detail = DND.DROP_NONE; | |
| 494 notifyListeners(DND.DragLeave, event); | |
| 495 } | |
| 496 | |
| 497 bool drag_motion ( | |
| 498 GtkWidget *widget, | |
| 499 GdkDragContext *context, | |
| 500 int x, | |
| 501 int y, | |
| 502 uint time) | |
| 503 { | |
| 504 int oldKeyOperation = keyOperation; | |
| 505 | |
| 506 if (oldKeyOperation is -1) { //drag enter | |
| 507 selectedDataType = null; | |
| 508 selectedOperation = DND.DROP_NONE; | |
| 509 } | |
| 510 | |
| 511 DNDEvent event = new DNDEvent(); | |
| 512 if (!setEventData(context, x, y, time, event)) { | |
| 513 keyOperation = -1; | |
| 514 OS.gdk_drag_status(context, 0, time); | |
| 515 return false; | |
| 516 } | |
| 517 | |
| 518 int allowedOperations = event.operations; | |
| 519 TransferData[] allowedDataTypes = new TransferData[event.dataTypes.length]; | |
| 520 System.arraycopy(event.dataTypes, 0, allowedDataTypes, 0, allowedDataTypes.length); | |
| 521 | |
| 522 if (oldKeyOperation is -1) { | |
| 523 event.type = DND.DragEnter; | |
| 524 } else { | |
| 525 if (keyOperation is oldKeyOperation) { | |
| 526 event.type = DND.DragOver; | |
| 527 event.dataType = selectedDataType; | |
| 528 event.detail = selectedOperation; | |
| 529 } else { | |
| 530 event.type = DND.DragOperationChanged; | |
| 531 event.dataType = selectedDataType; | |
| 532 } | |
| 533 } | |
| 534 updateDragOverHover(DRAGOVER_HYSTERESIS, event); | |
| 535 selectedDataType = null; | |
| 536 selectedOperation = DND.DROP_NONE; | |
| 537 notifyListeners(event.type, event); | |
| 538 if (event.detail is DND.DROP_DEFAULT) { | |
| 539 event.detail = (allowedOperations & DND.DROP_MOVE) !is 0 ? DND.DROP_MOVE : DND.DROP_NONE; | |
| 540 } | |
| 541 if (event.dataType !is null) { | |
| 542 for (int i = 0; i < allowedDataTypes.length; i++) { | |
| 543 if (allowedDataTypes[i].type is event.dataType.type) { | |
| 544 selectedDataType = allowedDataTypes[i]; | |
| 545 break; | |
| 546 } | |
| 547 } | |
| 548 } | |
| 549 if (selectedDataType !is null && (allowedOperations & event.detail) !is 0) { | |
| 550 selectedOperation = event.detail; | |
| 551 } | |
| 552 | |
| 553 switch (selectedOperation) { | |
| 554 case DND.DROP_NONE: | |
| 555 OS.gdk_drag_status(context, 0, time); | |
| 556 break; | |
| 557 case DND.DROP_COPY: | |
| 558 OS.gdk_drag_status(context, OS.GDK_ACTION_COPY, time); | |
| 559 break; | |
| 560 case DND.DROP_MOVE: | |
| 561 OS.gdk_drag_status(context, OS.GDK_ACTION_MOVE, time); | |
| 562 break; | |
| 563 case DND.DROP_LINK: | |
| 564 OS.gdk_drag_status(context, OS.GDK_ACTION_LINK, time); | |
| 565 break; | |
| 566 default: | |
| 567 } | |
| 568 | |
| 569 if (oldKeyOperation is -1) { | |
| 570 dragOverHeartbeat.run(); | |
| 571 } | |
| 572 return true; | |
| 573 } | |
| 574 | |
| 575 /** | |
| 576 * Returns the Control which is registered for this DropTarget. This is the control over which the | |
| 577 * user positions the cursor to drop the data. | |
| 578 * | |
| 579 * @return the Control which is registered for this DropTarget | |
| 580 */ | |
| 581 public Control getControl () { | |
| 582 return control; | |
| 583 } | |
| 584 | |
| 585 /** | |
| 586 * Returns an array of listeners who will be notified when a drag and drop | |
| 587 * operation is in progress, by sending it one of the messages defined in | |
| 588 * the <code>DropTargetListener</code> interface. | |
| 589 * | |
| 590 * @return the listeners who will be notified when a drag and drop | |
| 591 * operation is in progress | |
| 592 * | |
| 593 * @exception SWTException <ul> | |
| 594 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 595 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 596 * </ul> | |
| 597 * | |
| 598 * @see DropTargetListener | |
| 599 * @see #addDropListener | |
| 600 * @see #removeDropListener | |
| 601 * @see DropTargetEvent | |
| 602 * | |
| 603 * @since 3.4 | |
| 604 */ | |
| 605 public DropTargetListener[] getDropListeners() { | |
| 606 Listener[] listeners = getListeners(DND.DragEnter); | |
| 607 int length = listeners.length; | |
| 608 DropTargetListener[] dropListeners = new DropTargetListener[length]; | |
| 609 int count = 0; | |
| 610 for (int i = 0; i < length; i++) { | |
| 611 Listener listener = listeners[i]; | |
| 612 if ( auto l = cast(DNDListener)listener ) { | |
| 613 dropListeners[count] = cast(DropTargetListener) (l.getEventListener()); | |
| 614 count++; | |
| 615 } | |
| 616 } | |
| 617 if (count is length) return dropListeners; | |
| 618 DropTargetListener[] result = new DropTargetListener[count]; | |
| 619 SimpleType!(DropTargetListener).arraycopy(dropListeners, 0, result, 0, count); | |
| 620 return result; | |
| 621 } | |
| 622 | |
| 623 /** | |
| 624 * Returns the drop effect for this DropTarget. This drop effect will be | |
| 625 * used during a drag and drop to display the drag under effect on the | |
| 626 * target widget. | |
| 627 * | |
| 628 * @return the drop effect that is registered for this DropTarget | |
| 629 * | |
| 630 * @since 3.3 | |
| 631 */ | |
| 632 public DropTargetEffect getDropTargetEffect() { | |
| 633 return dropEffect; | |
| 634 } | |
| 635 | |
| 636 int getOperationFromKeyState() { | |
| 637 int state; | |
| 638 OS.gdk_window_get_pointer(null, null, null, &state); | |
| 639 bool ctrl = (state & OS.GDK_CONTROL_MASK) !is 0; | |
| 640 bool shift = (state & OS.GDK_SHIFT_MASK) !is 0; | |
| 641 if (ctrl && shift) return DND.DROP_LINK; | |
| 642 if (ctrl)return DND.DROP_COPY; | |
| 643 if (shift)return DND.DROP_MOVE; | |
| 644 return DND.DROP_DEFAULT; | |
| 645 } | |
| 646 | |
| 647 /** | |
| 648 * Returns a list of the data types that can be transferred to this DropTarget. | |
| 649 * | |
| 650 * @return a list of the data types that can be transferred to this DropTarget | |
| 651 */ | |
| 652 public Transfer[] getTransfer() { | |
| 653 return transferAgents; | |
| 654 } | |
| 655 | |
| 656 void onDispose(){ | |
| 657 if (control is null) return; | |
| 658 OS.g_signal_handler_disconnect(control.handle, drag_motion_handler); | |
| 659 OS.g_signal_handler_disconnect(control.handle, drag_leave_handler); | |
| 660 OS.g_signal_handler_disconnect(control.handle, drag_data_received_handler); | |
| 661 OS.g_signal_handler_disconnect(control.handle, drag_drop_handler); | |
| 662 if (transferAgents.length !is 0) | |
| 663 OS.gtk_drag_dest_unset(control.handle); | |
| 664 transferAgents = null; | |
| 665 if (controlListener !is null) | |
| 666 control.removeListener(SWT.Dispose, controlListener); | |
| 667 control.setData(DND.DROP_TARGET_KEY, null); | |
| 668 control = null; | |
| 669 controlListener = null; | |
| 670 } | |
| 671 | |
| 672 int opToOsOp(int operation){ | |
| 673 int osOperation = 0; | |
| 674 if ((operation & DND.DROP_COPY) is DND.DROP_COPY) | |
| 675 osOperation |= OS.GDK_ACTION_COPY; | |
| 676 if ((operation & DND.DROP_MOVE) is DND.DROP_MOVE) | |
| 677 osOperation |= OS.GDK_ACTION_MOVE; | |
| 678 if ((operation & DND.DROP_LINK) is DND.DROP_LINK) | |
| 679 osOperation |= OS.GDK_ACTION_LINK; | |
| 680 return osOperation; | |
| 681 } | |
| 682 | |
| 683 int osOpToOp(int osOperation){ | |
| 684 int operation = DND.DROP_NONE; | |
| 685 if ((osOperation & OS.GDK_ACTION_COPY) is OS.GDK_ACTION_COPY) | |
| 686 operation |= DND.DROP_COPY; | |
| 687 if ((osOperation & OS.GDK_ACTION_MOVE) is OS.GDK_ACTION_MOVE) | |
| 688 operation |= DND.DROP_MOVE; | |
| 689 if ((osOperation & OS.GDK_ACTION_LINK) is OS.GDK_ACTION_LINK) | |
| 690 operation |= DND.DROP_LINK; | |
| 691 return operation; | |
| 692 } | |
| 693 | |
| 694 /** | |
| 695 * Removes the listener from the collection of listeners who will | |
| 696 * be notified when a drag and drop operation is in progress. | |
| 697 * | |
| 698 * @param listener the listener which should no longer be notified | |
| 699 * | |
| 700 * @exception IllegalArgumentException <ul> | |
| 701 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
| 702 * </ul> | |
| 703 * @exception SWTException <ul> | |
| 704 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
| 705 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
| 706 * </ul> | |
| 707 * | |
| 708 * @see DropTargetListener | |
| 709 * @see #addDropListener | |
| 710 * @see #getDropListeners | |
| 711 */ | |
| 712 public void removeDropListener(DropTargetListener listener) { | |
| 713 if (listener is null) DND.error (SWT.ERROR_NULL_ARGUMENT); | |
| 714 removeListener (DND.DragEnter, listener); | |
| 715 removeListener (DND.DragLeave, listener); | |
| 716 removeListener (DND.DragOver, listener); | |
| 717 removeListener (DND.DragOperationChanged, listener); | |
| 718 removeListener (DND.Drop, listener); | |
| 719 removeListener (DND.DropAccept, listener); | |
| 720 } | |
| 721 | |
| 722 /** | |
| 723 * Specifies the data types that can be transferred to this DropTarget. If data is | |
| 724 * being dragged that does not match one of these types, the drop target will be notified of | |
| 725 * the drag and drop operation but the currentDataType will be null and the operation | |
| 726 * will be DND.NONE. | |
| 727 * | |
| 728 * @param transferAgents a list of Transfer objects which define the types of data that can be | |
| 729 * dropped on this target | |
| 730 * | |
| 731 * @exception IllegalArgumentException <ul> | |
| 732 * <li>ERROR_NULL_ARGUMENT - if transferAgents is null</li> | |
| 733 * </ul> | |
| 734 */ | |
| 735 public void setTransfer(Transfer[] transferAgents){ | |
| 736 if (transferAgents is null) DND.error(SWT.ERROR_NULL_ARGUMENT); | |
| 737 | |
| 738 if (this.transferAgents.length !is 0) { | |
| 739 OS.gtk_drag_dest_unset(control.handle); | |
| 740 } | |
| 741 this.transferAgents = transferAgents; | |
| 742 | |
| 743 GtkTargetEntry*[] targets; | |
| 744 for (int i = 0; i < transferAgents.length; i++) { | |
| 745 Transfer transfer = transferAgents[i]; | |
| 746 if (transfer !is null) { | |
| 747 int[] typeIds = transfer.getTypeIds(); | |
| 748 String[] typeNames = transfer.getTypeNames(); | |
| 749 for (int j = 0; j < typeIds.length; j++) { | |
| 750 GtkTargetEntry* entry = new GtkTargetEntry(); | |
| 751 entry.target = cast(char*)OS.g_malloc(typeNames[j].length +1); | |
| 752 entry.target[ 0 .. typeNames[j].length ] = typeNames[j]; | |
| 753 entry.target[ typeNames[j].length ] = '\0'; | |
| 754 entry.info = typeIds[j]; | |
| 755 GtkTargetEntry*[] newTargets = new GtkTargetEntry*[targets.length + 1]; | |
| 756 SimpleType!(GtkTargetEntry*).arraycopy(targets, 0, newTargets, 0, targets.length); | |
| 757 newTargets[targets.length] = entry; | |
| 758 targets = newTargets; | |
| 759 } | |
| 760 } | |
| 761 } | |
| 762 | |
| 763 auto pTargets = OS.g_malloc(targets.length * GtkTargetEntry.sizeof); | |
| 764 for (int i = 0; i < targets.length; i++) { | |
| 765 tango.stdc.string.memmove(pTargets + i*GtkTargetEntry.sizeof, targets[i], GtkTargetEntry.sizeof); | |
| 766 } | |
| 767 | |
| 768 int actions = opToOsOp(getStyle()); | |
| 769 if ( auto c = cast(Combo)control ) { | |
| 770 if ((control.getStyle() & SWT.READ_ONLY) is 0) { | |
| 771 auto entryHandle = OS.gtk_bin_get_child (control.handle); | |
| 772 if (entryHandle !is null) { | |
| 773 OS.gtk_drag_dest_unset(entryHandle); | |
| 774 } | |
| 775 } | |
| 776 } | |
| 777 OS.gtk_drag_dest_set(control.handle, 0, pTargets, targets.length, actions); | |
| 778 | |
| 779 for (int i = 0; i < targets.length; i++) { | |
| 780 OS.g_free(targets[i].target); | |
| 781 } | |
| 782 } | |
| 783 | |
| 784 /** | |
| 785 * Specifies the drop effect for this DropTarget. This drop effect will be | |
| 786 * used during a drag and drop to display the drag under effect on the | |
| 787 * target widget. | |
| 788 * | |
| 789 * @param effect the drop effect that is registered for this DropTarget | |
| 790 * | |
| 791 * @since 3.3 | |
| 792 */ | |
| 793 public void setDropTargetEffect(DropTargetEffect effect) { | |
| 794 dropEffect = effect; | |
| 795 } | |
| 796 | |
| 797 bool setEventData(GdkDragContext* dragContext, int x, int y, int time, DNDEvent event) { | |
| 798 if (dragContext is null) return false; | |
| 799 if (dragContext.targets is null) return false; | |
| 800 | |
| 801 // get allowed operations | |
| 802 int style = getStyle(); | |
| 803 int operations = osOpToOp(dragContext.actions) & style; | |
| 804 if (operations is DND.DROP_NONE) return false; | |
| 805 | |
| 806 // get current operation | |
| 807 int operation = getOperationFromKeyState(); | |
| 808 keyOperation = operation; | |
| 809 if (operation is DND.DROP_DEFAULT) { | |
| 810 if ((style & DND.DROP_DEFAULT) is 0) { | |
| 811 operation = (operations & DND.DROP_MOVE) !is 0 ? DND.DROP_MOVE : DND.DROP_NONE; | |
| 812 } | |
| 813 } else { | |
| 814 if ((operation & operations) is 0) operation = DND.DROP_NONE; | |
| 815 } | |
| 816 | |
| 817 // Get allowed transfer types | |
| 818 int length = OS.g_list_length(dragContext.targets); | |
| 819 TransferData[] dataTypes = new TransferData[0]; | |
| 820 for (int i = 0; i < length; i++) { | |
| 821 auto pData = OS.g_list_nth(dragContext.targets, i); | |
| 822 GtkTargetPair* gtkTargetPair = cast(GtkTargetPair*)pData; | |
| 823 TransferData data = new TransferData(); | |
| 824 data.type = gtkTargetPair.target; | |
| 825 for (int j = 0; j < transferAgents.length; j++) { | |
| 826 Transfer transfer = transferAgents[j]; | |
| 827 if (transfer !is null && transfer.isSupportedType(data)) { | |
| 828 TransferData[] newDataTypes = new TransferData[dataTypes.length + 1]; | |
| 829 System.arraycopy(dataTypes, 0, newDataTypes, 0, dataTypes.length); | |
| 830 newDataTypes[dataTypes.length] = data; | |
| 831 dataTypes = newDataTypes; | |
| 832 break; | |
| 833 } | |
| 834 } | |
| 835 } | |
| 836 if (dataTypes.length is 0) return false; | |
| 837 | |
| 838 auto window = OS.GTK_WIDGET_WINDOW(control.handle); | |
| 839 int origin_x, origin_y; | |
| 840 OS.gdk_window_get_origin(window, &origin_x, &origin_y); | |
| 841 Point coordinates = new Point(origin_x + x, origin_y + y); | |
| 842 | |
| 843 event.widget = this; | |
| 844 event.x = coordinates.x; | |
| 845 event.y = coordinates.y; | |
| 846 event.time = time; | |
| 847 event.feedback = DND.FEEDBACK_SELECT; | |
| 848 event.dataTypes = dataTypes; | |
| 849 event.dataType = dataTypes[0]; | |
| 850 event.operations = operations; | |
| 851 event.detail = operation; | |
| 852 if (dropEffect !is null) { | |
| 853 event.item = dropEffect.getItem(coordinates.x, coordinates.y); | |
| 854 } | |
| 855 return true; | |
| 856 } | |
| 857 | |
| 858 void updateDragOverHover(long delay, DNDEvent event) { | |
| 859 if (delay is 0) { | |
| 860 dragOverStart = 0; | |
| 861 dragOverEvent = null; | |
| 862 return; | |
| 863 } | |
| 864 dragOverStart = System.currentTimeMillis() + delay; | |
| 865 if (dragOverEvent is null) dragOverEvent = new DNDEvent(); | |
| 866 dragOverEvent.x = event.x; | |
| 867 dragOverEvent.y = event.y; | |
| 868 TransferData[] dataTypes = new TransferData[ event.dataTypes.length]; | |
| 869 System.arraycopy( event.dataTypes, 0, dataTypes, 0, dataTypes.length); | |
| 870 dragOverEvent.dataTypes = dataTypes; | |
| 871 dragOverEvent.operations = event.operations; | |
| 872 dragOverEvent.time = event.time; | |
| 873 } | |
| 874 | |
| 875 } |