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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/cocoa/org/eclipse/swt/dnd/DragSource.java')
| -rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/cocoa/org/eclipse/swt/dnd/DragSource.java | 848 |
1 files changed, 0 insertions, 848 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/cocoa/org/eclipse/swt/dnd/DragSource.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/cocoa/org/eclipse/swt/dnd/DragSource.java deleted file mode 100644 index efecaca1a9..0000000000 --- a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/cocoa/org/eclipse/swt/dnd/DragSource.java +++ /dev/null @@ -1,848 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2000, 2009 IBM Corporation and others. - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * which accompanies this distribution, and is available at - * http://www.eclipse.org/legal/epl-v10.html - * - * Contributors: - * IBM Corporation - initial API and implementation - *******************************************************************************/ -package org.eclipse.swt.dnd; - - -import org.eclipse.swt.*; -import org.eclipse.swt.graphics.*; -import org.eclipse.swt.internal.*; -import org.eclipse.swt.internal.cocoa.*; -import org.eclipse.swt.widgets.*; -/** - * - * <code>DragSource</code> defines the source object for a drag and drop transfer. - * - * <p>IMPORTANT: This class is <em>not</em> intended to be subclassed.</p> - * - * <p>A drag source is the object which originates a drag and drop operation. For the specified widget, - * it defines the type of data that is available for dragging and the set of operations that can - * be performed on that data. The operations can be any bit-wise combination of DND.MOVE, DND.COPY or - * DND.LINK. The type of data that can be transferred is specified by subclasses of Transfer such as - * TextTransfer or FileTransfer. The type of data transferred can be a predefined system type or it - * can be a type defined by the application. For instructions on how to define your own transfer type, - * refer to <code>ByteArrayTransfer</code>.</p> - * - * <p>You may have several DragSources in an application but you can only have one DragSource - * per Control. Data dragged from this DragSource can be dropped on a site within this application - * or it can be dropped on another application such as an external Text editor.</p> - * - * <p>The application supplies the content of the data being transferred by implementing the - * <code>DragSourceListener</code> and associating it with the DragSource via DragSource#addDragListener.</p> - * - * <p>When a successful move operation occurs, the application is required to take the appropriate - * action to remove the data from its display and remove any associated operating system resources or - * internal references. Typically in a move operation, the drop target makes a copy of the data - * and the drag source deletes the original. However, sometimes copying the data can take a long - * time (such as copying a large file). Therefore, on some platforms, the drop target may actually - * move the data in the operating system rather than make a copy. This is usually only done in - * file transfers. In this case, the drag source is informed in the DragEnd event that a - * DROP_TARGET_MOVE was performed. It is the responsibility of the drag source at this point to clean - * up its displayed information. No action needs to be taken on the operating system resources.</p> - * - * <p> The following example shows a Label widget that allows text to be dragged from it.</p> - * - * <code><pre> - * // Enable a label as a Drag Source - * Label label = new Label(shell, SWT.NONE); - * // This example will allow text to be dragged - * Transfer[] types = new Transfer[] {TextTransfer.getInstance()}; - * // This example will allow the text to be copied or moved to the drop target - * int operations = DND.DROP_MOVE | DND.DROP_COPY; - * - * DragSource source = new DragSource(label, operations); - * source.setTransfer(types); - * source.addDragListener(new DragSourceListener() { - * public void dragStart(DragSourceEvent e) { - * // Only start the drag if there is actually text in the - * // label - this text will be what is dropped on the target. - * if (label.getText().length() == 0) { - * event.doit = false; - * } - * }; - * public void dragSetData(DragSourceEvent event) { - * // A drop has been performed, so provide the data of the - * // requested type. - * // (Checking the type of the requested data is only - * // necessary if the drag source supports more than - * // one data type but is shown here as an example). - * if (TextTransfer.getInstance().isSupportedType(event.dataType)){ - * event.data = label.getText(); - * } - * } - * public void dragFinished(DragSourceEvent event) { - * // A Move operation has been performed so remove the data - * // from the source - * if (event.detail == DND.DROP_MOVE) - * label.setText(""); - * } - * }); - * </pre></code> - * - * - * <dl> - * <dt><b>Styles</b></dt> <dd>DND.DROP_NONE, DND.DROP_COPY, DND.DROP_MOVE, DND.DROP_LINK</dd> - * <dt><b>Events</b></dt> <dd>DND.DragStart, DND.DragSetData, DND.DragEnd</dd> - * </dl> - * - * @see <a href="http://www.eclipse.org/swt/snippets/#dnd">Drag and Drop snippets</a> - * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: DNDExample</a> - * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> - * @noextend This class is not intended to be subclassed by clients. - */ -public class DragSource extends Widget { - - // TODO: These should either move out of Display or be accessible to this class. - static byte[] types = {'*','\0'}; - static int size = C.PTR_SIZEOF, align = C.PTR_SIZEOF == 4 ? 2 : 3; - - static Callback dragSource2Args, dragSource3Args, dragSource4Args, dragSource5Args, dragSource6Args; - static final byte[] SWT_OBJECT = {'S', 'W', 'T', '_', 'O', 'B', 'J', 'E', 'C', 'T', '\0'}; - static int /*long*/ proc2 = 0, proc3 = 0, proc4 = 0, proc5 = 0, proc6 = 0; - - static { - String className = "SWTDragSourceDelegate"; - - Class clazz = DragSource.class; - - dragSource2Args = new Callback(clazz, "dragSourceProc", 2); - proc2 = dragSource2Args.getAddress(); - if (proc2 == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS); - - dragSource3Args = new Callback(clazz, "dragSourceProc", 3); - proc3 = dragSource3Args.getAddress(); - if (proc3 == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS); - - dragSource4Args = new Callback(clazz, "dragSourceProc", 4); - proc4 = dragSource4Args.getAddress(); - if (proc4 == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS); - - dragSource5Args = new Callback(clazz, "dragSourceProc", 5); - proc5 = dragSource5Args.getAddress(); - if (proc5 == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS); - - dragSource6Args = new Callback(clazz, "dragSourceProc", 6); - proc6 = dragSource6Args.getAddress(); - if (proc6 == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS); - - int /*long*/ cls = OS.objc_allocateClassPair(OS.class_NSObject, className, 0); - OS.class_addIvar(cls, SWT_OBJECT, size, (byte)align, types); - - int /*long*/ draggedImage_endedAt_operationProc = OS.CALLBACK_draggedImage_endedAt_operation_(proc5); - - // Add the NSDraggingSource callbacks - OS.class_addMethod(cls, OS.sel_draggingSourceOperationMaskForLocal_, proc3, "@:I"); - OS.class_addMethod(cls, OS.sel_draggedImage_beganAt_, proc4, "@:@{NSPoint=ff}"); - OS.class_addMethod(cls, OS.sel_draggedImage_endedAt_operation_, draggedImage_endedAt_operationProc, "@:@{NSPoint=ff}I"); - OS.class_addMethod(cls, OS.sel_ignoreModifierKeysWhileDragging, proc3, "@:"); - - // Add the NSPasteboard delegate callback - OS.class_addMethod(cls, OS.sel_pasteboard_provideDataForType_, proc4, "@:@@"); - - OS.objc_registerClassPair(cls); - } - - // info for registering as a drag source - Control control; - Listener controlListener; - Transfer[] transferAgents = new Transfer[0]; - DragSourceEffect dragEffect; - Image dragImageFromListener; - private int dragOperations; - SWTDragSourceDelegate dragSourceDelegate; - - static final String DEFAULT_DRAG_SOURCE_EFFECT = "DEFAULT_DRAG_SOURCE_EFFECT"; //$NON-NLS-1$ - - private int /*long*/ delegateJniRef; - private Point dragOffset; - -/** - * Creates a new <code>DragSource</code> to handle dragging from the specified <code>Control</code>. - * Creating an instance of a DragSource may cause system resources to be allocated depending on the platform. - * It is therefore mandatory that the DragSource instance be disposed when no longer required. - * - * @param control the <code>Control</code> that the user clicks on to initiate the drag - * @param style the bitwise OR'ing of allowed operations; this may be a combination of any of - * DND.DROP_NONE, DND.DROP_COPY, DND.DROP_MOVE, DND.DROP_LINK - * - * @exception SWTException <ul> - * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> - * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> - * </ul> - * @exception SWTError <ul> - * <li>ERROR_CANNOT_INIT_DRAG - unable to initiate drag source; this will occur if more than one - * drag source is created for a control or if the operating system will not allow the creation - * of the drag source</li> - * </ul> - * - * <p>NOTE: ERROR_CANNOT_INIT_DRAG should be an SWTException, since it is a - * recoverable error, but can not be changed due to backward compatibility.</p> - * - * @see Widget#dispose - * @see DragSource#checkSubclass - * @see DND#DROP_NONE - * @see DND#DROP_COPY - * @see DND#DROP_MOVE - * @see DND#DROP_LINK - */ -public DragSource(Control control, int style) { - super (control, checkStyle(style)); - this.control = control; - if (control.getData(DND.DRAG_SOURCE_KEY) != null) { - DND.error(DND.ERROR_CANNOT_INIT_DRAG); - } - control.setData(DND.DRAG_SOURCE_KEY, this); - - controlListener = new Listener () { - public void handleEvent (Event event) { - if (event.type == SWT.Dispose) { - if (!DragSource.this.isDisposed()) { - DragSource.this.dispose(); - } - } - if (event.type == SWT.DragDetect) { - if (!DragSource.this.isDisposed()) { - if (event.widget instanceof Table || event.widget instanceof Tree) { - DragSource.this.dragOutlineViewStart(event); - } else { - DragSource.this.drag(event); - } - } - } - } - }; - control.addListener (SWT.Dispose, controlListener); - control.addListener (SWT.DragDetect, controlListener); - - this.addListener(SWT.Dispose, new Listener() { - public void handleEvent(Event e) { - onDispose(); - } - }); - - Object effect = control.getData(DEFAULT_DRAG_SOURCE_EFFECT); - if (effect instanceof DragSourceEffect) { - dragEffect = (DragSourceEffect) effect; - } else if (control instanceof Tree) { - dragEffect = new TreeDragSourceEffect((Tree) control); - } else if (control instanceof Table) { - dragEffect = new TableDragSourceEffect((Table) control); - } - - delegateJniRef = OS.NewGlobalRef(this); - if (delegateJniRef == 0) SWT.error(SWT.ERROR_NO_HANDLES); - - // The dragSourceDelegate implements the pasteboard callback to provide the dragged data, so we always need - // to create it. NSDraggingSource methods are ignored in the table and tree case. - dragSourceDelegate = (SWTDragSourceDelegate)new SWTDragSourceDelegate().alloc().init(); - OS.object_setInstanceVariable(dragSourceDelegate.id, SWT_OBJECT, delegateJniRef); - - // Tables and trees already implement dragging, so we need to override their drag methods instead of creating a dragging source. - if (control instanceof Tree || control instanceof Table) { - int /*long*/ cls = OS.object_getClass(control.view.id); - - if (cls == 0) { - DND.error(DND.ERROR_CANNOT_INIT_DRAG); - } - - // If we already added it, no need to do it again. - int /*long*/ procPtr = OS.class_getMethodImplementation(cls, OS.sel_draggingSourceOperationMaskForLocal_); - if (procPtr == proc3) return; - - int /*long*/ draggedImage_endedAt_operationProc = OS.CALLBACK_draggedImage_endedAt_operation_(proc5); - - // Add the NSDraggingSource overrides. - OS.class_addMethod(cls, OS.sel_draggingSourceOperationMaskForLocal_, proc3, "@:I"); - OS.class_addMethod(cls, OS.sel_draggedImage_beganAt_, proc4, "@:@{NSPoint=ff}"); - OS.class_addMethod(cls, OS.sel_draggedImage_endedAt_operation_, draggedImage_endedAt_operationProc, "@:@{NSPoint=ff}I"); - OS.class_addMethod(cls, OS.sel_ignoreModifierKeysWhileDragging, proc3, "@:"); - - // Override to return the drag effect's image. - OS.class_addMethod(cls, OS.sel_dragImageForRowsWithIndexes_tableColumns_event_offset_, proc6, "@:@@@^NSPoint"); - } - -} - -/** - * Adds the listener to the collection of listeners who will - * be notified when a drag and drop operation is in progress, by sending - * it one of the messages defined in the <code>DragSourceListener</code> - * interface. - * - * <p><ul> - * <li><code>dragStart</code> is called when the user has begun the actions required to drag the widget. - * This event gives the application the chance to decide if a drag should be started. - * <li><code>dragSetData</code> is called when the data is required from the drag source. - * <li><code>dragFinished</code> is called when the drop has successfully completed (mouse up - * over a valid target) or has been terminated (such as hitting the ESC key). Perform cleanup - * such as removing data from the source side on a successful move operation. - * </ul></p> - * - * @param listener the listener which should be notified - * - * @exception IllegalArgumentException <ul> - * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> - * </ul> - * @exception SWTException <ul> - * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> - * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> - * </ul> - * - * @see DragSourceListener - * @see #getDragListeners - * @see #removeDragListener - * @see DragSourceEvent - */ -public void addDragListener(DragSourceListener listener) { - if (listener == null) DND.error (SWT.ERROR_NULL_ARGUMENT); - DNDListener typedListener = new DNDListener (listener); - typedListener.dndWidget = this; - addListener (DND.DragStart, typedListener); - addListener (DND.DragSetData, typedListener); - addListener (DND.DragEnd, typedListener); -} - -void callSuper(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0, NSPoint arg1, int /*long*/ arg2) { - objc_super super_struct = new objc_super(); - super_struct.receiver = id; - super_struct.super_class = OS.objc_msgSend(id, OS.sel_superclass); - OS.objc_msgSendSuper(super_struct, sel, arg0, arg1, arg2); -} - -void callSuper(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0, int /*long*/ arg1) { - objc_super super_struct = new objc_super(); - super_struct.receiver = id; - super_struct.super_class = OS.objc_msgSend(id, OS.sel_superclass); - OS.objc_msgSendSuper(super_struct, sel, arg0, arg1); -} - -int /*long*/ callSuperObject(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0, int /*long*/ arg1, int /*long*/ arg2, int /*long*/ arg3) { - objc_super super_struct = new objc_super(); - super_struct.receiver = id; - super_struct.super_class = OS.objc_msgSend(id, OS.sel_superclass); - return OS.objc_msgSendSuper(super_struct, sel, arg0, arg1, arg2, arg3); -} - -protected void checkSubclass () { - String name = getClass().getName (); - String validName = DragSource.class.getName(); - if (!validName.equals(name)) { - DND.error (SWT.ERROR_INVALID_SUBCLASS); - } -} - -static int checkStyle (int style) { - if (style == SWT.NONE) return DND.DROP_MOVE; - return style; -} - -void drag(Event dragDetectEvent) { - - DNDEvent event = startDrag(dragDetectEvent); - if (event == null) return; - - // Start the drag here from the Control's view. - NSEvent currEvent = NSApplication.sharedApplication().currentEvent(); - NSPoint pt = currEvent.locationInWindow(); - NSPoint viewPt = control.view.convertPoint_fromView_(pt, null); - - // Get the image for the drag. The drag should happen from the middle of the image. - NSImage dragImage = null; - Image defaultDragImage = null; - try { - Image image = event.image; - - // If no image was provided, just create a trivial image. dragImage requires a non-null image. - if (image == null) { - int width = 20, height = 20; - Image newDragImage = new Image(Display.getCurrent(), width, height); - GC imageGC = new GC(newDragImage); - Color grayColor = new Color(Display.getCurrent(), 50, 50, 50); - imageGC.setForeground(grayColor); - imageGC.drawRectangle(0, 0, 19, 19); - imageGC.dispose(); - ImageData newImageData = newDragImage.getImageData(); - newImageData.alpha = (int)(255 * .4); - defaultDragImage = new Image(Display.getCurrent(), newImageData); - newDragImage.dispose(); - grayColor.dispose(); - image = defaultDragImage; - event.offsetX = width / 2; - event.offsetY = height / 2; - } - - dragImage = image.handle; - - NSSize imageSize = dragImage.size(); - viewPt.x -= event.offsetX; - - if (control.view.isFlipped()) - viewPt.y += imageSize.height - event.offsetY; - else - viewPt.y -= event.offsetY; - - // The third argument to dragImage is ignored as of 10.4. - NSSize ignored = new NSSize(); - - control.view.dragImage(dragImage, viewPt, ignored, NSApplication.sharedApplication().currentEvent(), NSPasteboard.pasteboardWithName(OS.NSDragPboard), dragSourceDelegate, true); - - } finally { - if (defaultDragImage != null) defaultDragImage.dispose(); - } -} - -void dragOutlineViewStart(Event dragDetectEvent) { - DNDEvent event = startDrag(dragDetectEvent); - if (event == null) return; - - // Save off the custom image, if any. - dragImageFromListener = event.image; - - // Save the computed offset for the image. This needs to be passed back in dragImageForRowsWithIndexes - // so the proxy image originates from the selection and not centered under the mouse. - dragOffset = new Point(event.offsetX, event.offsetY); -} - -void draggedImage_beganAt(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0, int /*long*/ arg1) { - if (new NSObject(id).isKindOfClass(OS.class_NSTableView)) { - callSuper(id, sel, arg0, arg1); - } -} - -void draggedImage_endedAt_operation(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0, NSPoint arg1, int /*long*/ arg2) { - int swtOperation = osOpToOp(arg2); - Event event = new DNDEvent(); - event.widget = this; - event.time = (int)System.currentTimeMillis(); - event.doit = swtOperation != DND.DROP_NONE; - event.detail = swtOperation; - notifyListeners(DND.DragEnd, event); - dragImageFromListener = null; - - if (new NSObject(id).isKindOfClass(OS.class_NSTableView)) { - callSuper(id, sel, arg0, arg1, arg2); - } -} - -int /*long*/ dragImageForRowsWithIndexes_tableColumns_event_offset(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0, int /*long*/ arg1, int /*long*/ arg2, int /*long*/ arg3) { - if (dragImageFromListener != null) { - NSPoint point = new NSPoint(); - point.x = dragOffset.x; - point.y = dragOffset.y; - OS.memmove(arg3, point, NSPoint.sizeof); - return dragImageFromListener.handle.id; - } else { - return callSuperObject(id, sel, arg0, arg1, arg2, arg3); - } -} - -/** - * Cocoa NSDraggingSource implementations - */ -int /*long*/ draggingSourceOperationMaskForLocal(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0) { - // Drag operations are same for local or remote drags. - return dragOperations; -} - -static int /*long*/ dragSourceProc(int /*long*/ id, int /*long*/ sel) { - Display display = Display.findDisplay(Thread.currentThread()); - if (display == null || display.isDisposed()) return 0; - Widget widget = display.findWidget(id); - if (widget == null) return 0; - DragSource ds = null; - - if (widget instanceof DragSource) { - ds = (DragSource)widget; - } else { - ds = (DragSource)widget.getData(DND.DRAG_SOURCE_KEY); - } - - if (ds == null) return 0; - - if (sel == OS.sel_ignoreModifierKeysWhileDragging) { - return (ds.ignoreModifierKeysWhileDragging(id, sel) ? 1 : 0); - } - - return 0; -} - -static int /*long*/ dragSourceProc(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0) { - Display display = Display.findDisplay(Thread.currentThread()); - if (display == null || display.isDisposed()) return 0; - Widget widget = display.findWidget(id); - if (widget == null) return 0; - DragSource ds = null; - - if (widget instanceof DragSource) { - ds = (DragSource)widget; - } else { - ds = (DragSource)widget.getData(DND.DRAG_SOURCE_KEY); - } - - if (ds == null) return 0; - - if (sel == OS.sel_draggingSourceOperationMaskForLocal_) { - return ds.draggingSourceOperationMaskForLocal(id, sel, arg0); - } - - return 0; -} - -static int /*long*/ dragSourceProc(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0, int /*long*/ arg1) { - Display display = Display.findDisplay(Thread.currentThread()); - if (display == null || display.isDisposed()) return 0; - Widget widget = display.findWidget(id); - if (widget == null) return 0; - DragSource ds = null; - - if (widget instanceof DragSource) { - ds = (DragSource)widget; - } else { - ds = (DragSource)widget.getData(DND.DRAG_SOURCE_KEY); - } - - if (ds == null) return 0; - - if (sel == OS.sel_draggedImage_beganAt_) { - ds.draggedImage_beganAt(id, sel, arg0, arg1); - } else if (sel == OS.sel_pasteboard_provideDataForType_) { - ds.pasteboard_provideDataForType(id, sel, arg0, arg1); - } - - return 0; -} - -static int /*long*/ dragSourceProc(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0, int /*long*/ arg1, int /*long*/ arg2) { - Display display = Display.findDisplay(Thread.currentThread()); - if (display == null || display.isDisposed()) return 0; - Widget widget = display.findWidget(id); - if (widget == null) return 0; - DragSource ds = null; - - if (widget instanceof DragSource) { - ds = (DragSource)widget; - } else { - ds = (DragSource)widget.getData(DND.DRAG_SOURCE_KEY); - } - - if (ds == null) return 0; - - if (sel == OS.sel_draggedImage_endedAt_operation_) { - NSPoint point = new NSPoint(); - OS.memmove(point, arg1, NSPoint.sizeof); - ds.draggedImage_endedAt_operation(id, sel, arg0, point, arg2); - } - - return 0; -} - -static int /*long*/ dragSourceProc(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0, int /*long*/ arg1, int /*long*/ arg2, int /*long*/ arg3) { - Display display = Display.findDisplay(Thread.currentThread()); - if (display == null || display.isDisposed()) return 0; - Widget widget = display.findWidget(id); - if (widget == null) return 0; - DragSource ds = null; - - if (widget instanceof DragSource) { - ds = (DragSource)widget; - } else { - ds = (DragSource)widget.getData(DND.DRAG_SOURCE_KEY); - } - - if (ds == null) return 0; - - if (sel == OS.sel_dragImageForRowsWithIndexes_tableColumns_event_offset_) { - return ds.dragImageForRowsWithIndexes_tableColumns_event_offset(id, sel, arg0, arg1, arg2, arg3); - } - - return 0; -} - -/** - * Returns the Control which is registered for this DragSource. This is the control that the - * user clicks in to initiate dragging. - * - * @return the Control which is registered for this DragSource - */ -public Control getControl () { - return control; -} - -/** - * Returns an array of listeners who will be notified when a drag and drop - * operation is in progress, by sending it one of the messages defined in - * the <code>DragSourceListener</code> interface. - * - * @return the listeners who will be notified when a drag and drop - * operation is in progress - * - * @exception SWTException <ul> - * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> - * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> - * </ul> - * - * @see DragSourceListener - * @see #addDragListener - * @see #removeDragListener - * @see DragSourceEvent - * - * @since 3.4 - */ -public DragSourceListener[] getDragListeners() { - Listener[] listeners = getListeners(DND.DragStart); - int length = listeners.length; - DragSourceListener[] dragListeners = new DragSourceListener[length]; - int count = 0; - for (int i = 0; i < length; i++) { - Listener listener = listeners[i]; - if (listener instanceof DNDListener) { - dragListeners[count] = (DragSourceListener) ((DNDListener) listener).getEventListener(); - count++; - } - } - if (count == length) return dragListeners; - DragSourceListener[] result = new DragSourceListener[count]; - System.arraycopy(dragListeners, 0, result, 0, count); - return result; -} - -/** - * Returns the drag effect that is registered for this DragSource. This drag - * effect will be used during a drag and drop operation. - * - * @return the drag effect that is registered for this DragSource - * - * @since 3.3 - */ -public DragSourceEffect getDragSourceEffect() { - return dragEffect; -} - -/** - * Returns the list of data types that can be transferred by this DragSource. - * - * @return the list of data types that can be transferred by this DragSource - */ -public Transfer[] getTransfer(){ - return transferAgents; -} - -/** - * We always want the modifier keys to potentially update the drag. - */ -boolean ignoreModifierKeysWhileDragging(int /*long*/ id, int /*long*/ sel) { - return false; -} - -void onDispose() { - if (control == null) - return; - - if (controlListener != null) { - control.removeListener(SWT.Dispose, controlListener); - control.removeListener(SWT.DragDetect, controlListener); - } - controlListener = null; - control.setData(DND.DRAG_SOURCE_KEY, null); - control = null; - transferAgents = null; - - if (delegateJniRef != 0) OS.DeleteGlobalRef(delegateJniRef); - delegateJniRef = 0; - - if (dragSourceDelegate != null) { - OS.object_setInstanceVariable(dragSourceDelegate.id, SWT_OBJECT, 0); - dragSourceDelegate.release(); - } -} - -int opToOsOp(int operation) { - int osOperation = 0; - if ((operation & DND.DROP_COPY) != 0){ - osOperation |= OS.NSDragOperationCopy; - } - if ((operation & DND.DROP_LINK) != 0) { - osOperation |= OS.NSDragOperationLink; - } - if ((operation & DND.DROP_MOVE) != 0) { - osOperation |= OS.NSDragOperationMove; - } - if ((operation & DND.DROP_TARGET_MOVE) != 0) { - osOperation |= OS.NSDragOperationDelete; - } - return osOperation; -} - -int osOpToOp(int /*long*/ osOperation){ - int operation = 0; - if ((osOperation & OS.NSDragOperationCopy) != 0){ - operation |= DND.DROP_COPY; - } - if ((osOperation & OS.NSDragOperationLink) != 0) { - operation |= DND.DROP_LINK; - } - if ((osOperation & OS.NSDragOperationDelete) != 0) { - operation |= DND.DROP_TARGET_MOVE; - } - if ((osOperation & OS.NSDragOperationMove) != 0) { - operation |= DND.DROP_MOVE; - } - if (osOperation == OS.NSDragOperationEvery) { - operation = DND.DROP_COPY | DND.DROP_MOVE | DND.DROP_LINK; - } - return operation; -} - -void pasteboard_provideDataForType(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0, int /*long*/ arg1) { - NSPasteboard pasteboard = new NSPasteboard(arg0); - NSString dataType = new NSString(arg1); - if (pasteboard == null || dataType == null) return; - TransferData transferData = new TransferData(); - transferData.type = Transfer.registerType(dataType.getString()); - DNDEvent event = new DNDEvent(); - event.widget = this; - event.time = (int)System.currentTimeMillis(); - event.dataType = transferData; - notifyListeners(DND.DragSetData, event); - if (!event.doit) return; - Transfer transfer = null; - for (int i = 0; i < transferAgents.length; i++) { - Transfer transferAgent = transferAgents[i]; - if (transferAgent != null && transferAgent.isSupportedType(transferData)) { - transfer = transferAgent; - break; - } - } - if (transfer == null) return; - transfer.javaToNative(event.data, transferData); - if (transferData.data == null) return; - - NSObject tdata = transferData.data; - - if (dataType.isEqual(OS.NSStringPboardType) || - dataType.isEqual(OS.NSHTMLPboardType) || - dataType.isEqual(OS.NSRTFPboardType)) { - pasteboard.setString((NSString) tdata, dataType); - } else if (dataType.isEqual(OS.NSURLPboardType)) { - NSURL url = (NSURL) tdata; - url.writeToPasteboard(pasteboard); - } else if (dataType.isEqual(OS.NSFilenamesPboardType)) { - pasteboard.setPropertyList((NSArray) tdata, dataType); - } else { - pasteboard.setData((NSData) tdata, dataType); - } -} - -/** - * Removes the listener from the collection of listeners who will - * be notified when a drag and drop operation is in progress. - * - * @param listener the listener which should no longer be notified - * - * @exception IllegalArgumentException <ul> - * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> - * </ul> - * @exception SWTException <ul> - * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> - * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> - * </ul> - * - * @see DragSourceListener - * @see #addDragListener - * @see #getDragListeners - */ -public void removeDragListener(DragSourceListener listener) { - if (listener == null) DND.error (SWT.ERROR_NULL_ARGUMENT); - removeListener (DND.DragStart, listener); - removeListener (DND.DragSetData, listener); - removeListener (DND.DragEnd, listener); -} - -/** - * Specifies the drag effect for this DragSource. This drag effect will be - * used during a drag and drop operation. - * - * @param effect the drag effect that is registered for this DragSource - * - * @since 3.3 - */ -public void setDragSourceEffect(DragSourceEffect effect) { - dragEffect = effect; -} -/** - * Specifies the list of data types that can be transferred by this DragSource. - * The application must be able to provide data to match each of these types when - * a successful drop has occurred. - * - * @param transferAgents a list of Transfer objects which define the types of data that can be - * dragged from this source - */ -public void setTransfer(Transfer[] transferAgents){ - this.transferAgents = transferAgents; -} - -DNDEvent startDrag(Event dragEvent) { - DNDEvent event = new DNDEvent(); - event.widget = this; - event.x = dragEvent.x; - event.y = dragEvent.y; - event.time = dragEvent.time; - event.doit = true; - notifyListeners(DND.DragStart, event); - if (!event.doit || transferAgents == null || transferAgents.length == 0) return null; - - NSPasteboard dragBoard = NSPasteboard.pasteboardWithName(OS.NSDragPboard); - NSMutableArray nativeTypeArray = NSMutableArray.arrayWithCapacity(10); - Transfer fileTrans = null; - - for (int i = 0; i < transferAgents.length; i++) { - Transfer transfer = transferAgents[i]; - if (transfer != null) { - String[] typeNames = transfer.getTypeNames(); - - for (int j = 0; j < typeNames.length; j++) { - nativeTypeArray.addObject(NSString.stringWith(typeNames[j])); - } - - if (transfer instanceof FileTransfer) { - fileTrans = transfer; - } - } - } - - if (nativeTypeArray != null) - dragBoard.declareTypes(nativeTypeArray, dragSourceDelegate); - - if (fileTrans != null) { - int[] types = fileTrans.getTypeIds(); - TransferData transferData = new TransferData(); - transferData.type = types[0]; - DNDEvent event2 = new DNDEvent(); - event2.widget = this; - event2.time = (int)System.currentTimeMillis(); - event2.dataType = transferData; - notifyListeners(DND.DragSetData, event2); - if (event2.data != null) { - for (int j = 0; j < types.length; j++) { - transferData.type = types[j]; - fileTrans.javaToNative(event2.data, transferData); - if (transferData.data != null) { - dragBoard.setPropertyList(transferData.data, OS.NSFilenamesPboardType); - } - } - } - } - - // Save off the drag operations -- AppKit will call back to us to request them during the drag. - dragOperations = opToOsOp(getStyle()); - - return event; -} -} |