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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DragSource.java')
-rwxr-xr-xbundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DragSource.java482
1 files changed, 0 insertions, 482 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DragSource.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DragSource.java
deleted file mode 100755
index 38b3e08568..0000000000
--- a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DragSource.java
+++ /dev/null
@@ -1,482 +0,0 @@
-package org.eclipse.swt.dnd;
-
-/*
- * (c) Copyright IBM Corp. 2000, 2001.
- * All Rights Reserved
- */
-
-import org.eclipse.swt.*;
-import org.eclipse.swt.widgets.*;
-import org.eclipse.swt.internal.*;
-import org.eclipse.swt.internal.motif.*;
-
-/**
- *
- * Class <code>DragSource</code> defines the source object for a drag and drop transfer.
- *
- * IMPORTANT: This class is <em>not</em> intended to be subclassed.
- *
- * <p>This class defines the following items:<ul>
- * <li>the <code>Control</code> that the user clicks on to intiate a drag;
- * <li>the data that will be transferred on a successful drop;
- * <li>and the modes (move, copy, link) of transfer that are allowed.
- * </ul></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
- * but it can also 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 interface
- * <code>DragSourceListener</code> which uses the class <code>DragSourceEvent</code>.
- * The application is required to take the appropriate action to remove the data from the drag source
- * when a successful move operation occurs.</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> <dd>DND.DROP_NONE, DND.DROP_COPY, DND.DROP_MOVE, DND.DROP_LINK
- * <dt><b>Events</b> <dd>DND.DragEnd, DND.DragSetData
- * </dl>
- */
-public class DragSource extends Widget {
-
- private Callback convertProc;
- private Callback dragDropFinish;
- private Callback dropFinish;
-
- // info for registering as a drag source
- private Control control;
- private Listener controlListener;
- private Transfer[] transferAgents = new Transfer[0];
-
- private boolean moveRequested;
-
- int dragContext;
-
-/**
- * Creates a new <code>DragSource</code> to handle dragging from the specified <code>Control</code>.
- *
- * @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
- *
- */
-public DragSource(Control control, int style) {
- super (control, checkStyle(style));
-
- this.control = control;
-
- 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){
- DragSource.this.drag();
- }
-
- }
- };
- this.control.addListener (SWT.Dispose, controlListener);
- this.control.addListener (SWT.DragDetect, controlListener);
-
- this.addListener (SWT.Dispose, new Listener () {
- public void handleEvent (Event event) {
- onDispose();
- }
- });
-}
-/**
- * Adds the listener to receive events.
- *
- * @param listener the listener
- *
- * @exception SWTError
- * <ul><li>ERROR_THREAD_INVALID_ACCESS when called from the wrong thread</li>
- * <li>ERROR_WIDGET_DISPOSED when the widget has been disposed</li>
- * <li>ERROR_NULL_ARGUMENT when listener is null</li></ul>
- */
-public void addDragListener(DragSourceListener listener) {
- if (listener == null) DND.error (SWT.ERROR_NULL_ARGUMENT);
- DNDListener typedListener = new DNDListener (listener);
- addListener (DND.DragStart, typedListener);
- addListener (DND.DragSetData, typedListener);
- addListener (DND.DragEnd, typedListener);
-}
-static int checkStyle (int style) {
- if (style == SWT.NONE) return DND.DROP_MOVE;
- return style;
-}
-private int convertProcCallback(int widget, int pSelection, int pTarget, int pType_return, int ppValue_return, int pLength_return, int pFormat_return, int max_length, int client_data, int request_id) {
- /*
- pSelection - atom specifying which property is being used to transfer the selection (only support _MOTIF_DROP)
- pTarget - atom specifying the type in which the requestor wants the information
- pType_return - [out] type atom that data has been converted to (usually the same as pTarget)
- ppValue_return - [out] set to a pointer to a block of memory
- pLength_return - [out] number of elements in the array
- pFormat_return - [out] size in bits of each element in the array
-
- */
-
- if (pSelection == 0 )
- return 0;
-
- // is this a drop?
- int[] selection = new int[1];
- OS.memmove(selection, pSelection, 4);
- int motifDropAtom = Transfer.registerType("_MOTIF_DROP\0");
- if (selection[0] != motifDropAtom) return 0;
-
- // get the target value from pTarget
- int[] target = new int[1];
- OS.memmove(target, pTarget, 4);
-
- // handle the "Move" case
- if (target[0] == Transfer.registerType("DELETE\0")) { // DELETE corresponds to a Move request
- moveRequested = true;
- OS.memmove(pType_return,new int[]{Transfer.registerType("NULL\0")}, 4);
- OS.memmove(ppValue_return, new int[]{0}, 4);
- OS.memmove(pLength_return, new int[]{0}, 4);
- OS.memmove(pFormat_return, new int[]{8}, 4);
- return 1;
- }
-
- // do we support the requested data type?
- boolean dataMatch = true;
- TransferData transferData = new TransferData();
- transferData.type = target[0];
- for (int i = 0; i < transferAgents.length; i++){
- if (transferAgents[i].isSupportedType(transferData)){
- dataMatch = true;
- break;
- }
- }
- if (!dataMatch) return 0;
-
- DNDEvent event = new DNDEvent();
- event.widget = control;
- //event.time = ??;
- event.dataType = transferData;
- try {
- notifyListeners(DND.DragSetData,event);
- } catch (Throwable err) {
- return 0;
- }
-
- if (event.data == null) return 0;
-
- Transfer transferAgent = null;
- for (int i = 0; i < transferAgents.length; i++){
- if (transferAgents[i].isSupportedType(transferData)){
- transferAgent = transferAgents[i];
- break;
- }
- }
- if (transferAgent == null) return 0;
-
- transferAgent.javaToNative(event.data, transferData);
- if (transferData.result == 1){
- OS.memmove(ppValue_return, new int[]{transferData.pValue}, 4);
- OS.memmove(pType_return, new int[]{transferData.type}, 4);
- OS.memmove(pLength_return, new int[]{transferData.length}, 4);
- OS.memmove(pFormat_return, new int[]{transferData.format}, 4);
- return 1;
- } else {
- OS.memmove(ppValue_return, new int[]{0}, 4);
- OS.memmove(pLength_return, new int[]{0}, 4);
- OS.memmove(pFormat_return, new int[]{8}, 4);
- return 0;
- }
-}
-private void drag() {
- if (transferAgents == null)
- return;
-
- // Current event must be a Button Press event
- Display display = control.getDisplay ();
- if (display.xEvent.type != OS.ButtonPress) return;
-
- DNDEvent event = new DNDEvent();
- event.widget = this;
- event.time = display.xEvent.pad2;
- event.doit = true;
-
- try {
- notifyListeners(DND.DragStart, event);
- } catch (Throwable e) {
- event.doit = false;
- }
-
- if (!event.doit) {
- int time = display.xEvent.pad2; // corresponds to time field in XButtonEvent
- int dc = OS.XmGetDragContext(control.handle, time);
- if (dc != 0){
- OS.XmDragCancel(dc);
- }
- return;
- }
-
- // set the protocol (optional)
- // not implemented
-
- // create pixmaps for icons (optional)
- // not implemented
-
- // Copy targets to global memory
- TransferData[] transferData = new TransferData[0];
- for (int i = 0; i < transferAgents.length; i++){
- TransferData[] data = transferAgents[i].getSupportedTypes();
- TransferData[] newTransferData = new TransferData[transferData.length + data.length];
- System.arraycopy(transferData, 0, newTransferData, 0, transferData.length);
- System.arraycopy(data, 0, newTransferData, transferData.length, data.length);
- transferData = newTransferData;
- }
- int[] dataTypes = new int[transferData.length];
- for (int i = 0; i < transferData.length; i++){
- dataTypes[i] = transferData[i].type;
- }
- int pExportTargets = OS.XtMalloc(dataTypes.length * 4);
- OS.memmove(pExportTargets, dataTypes, dataTypes.length * 4);
-
- if (convertProc == null)
- convertProc = new Callback(this, "convertProcCallback", 10);
- if (convertProc == null) return;
-
- int[] args = new int[]{
- OS.XmNexportTargets, pExportTargets,
- OS.XmNnumExportTargets, dataTypes.length,
- OS.XmNdragOperations, opToOsOp(getStyle()),
- OS.XmNconvertProc, convertProc.getAddress(),
- OS.XmNoperationCursorIcon, 0,
- OS.XmNsourceCursorIcon, 0,
- OS.XmNstateCursorIcon, 0,
- OS.XmNclientData, 0,
- OS.XmNblendModel, OS.XmBLEND_ALL
- };
-
- // look for existing drag contexts
- int time = display.xEvent.pad2; // corresponds to time field in XButtonEvent
- dragContext = OS.XmGetDragContext(control.handle, time);
- if (dragContext != 0){
- OS.XtSetValues(dragContext, args, args.length /2);
- } else {
- dragContext = OS.XmDragStart(this.control.handle, display.xEvent, args, args.length / 2);
- }
- OS.XtFree(pExportTargets);
- if (dragContext == 0) return;
-
- // register a call back to clean up when drop is done (optional)
- if (dragDropFinish == null)
- dragDropFinish = new Callback(this, "dragDropFinishCallback", 3);
- OS.XtAddCallback(dragContext, OS.XmNdragDropFinishCallback, dragDropFinish.getAddress(), 0);
-
- // register a call back to tell user what happened (optional)
- if (dropFinish == null)
- dropFinish = new Callback(this, "dropFinishCallback", 3);
- OS.XtAddCallback(dragContext, OS.XmNdropFinishCallback, dropFinish.getAddress(), 0);
- return;
-}
-
-private int dragDropFinishCallback(int widget, int client_data, int call_data) {
-
- // uncomment the following code when we allow users to specify their own source icons
- // release the pre set source icon
- //int pSourceIcon = OS.XtMalloc(4);
- //int[] args = new int[]{OS.XmNsourceCursorIcon, pSourceIcon};
- //OS.XtGetValues(control.handle, args, args.length / 2);
- //int[] sourceIcon = new int[1];
- //OS.memmove(sourceIcon, pSourceIcon, 4);
- //if (sourceIcon[0] != 0)
- //OS.XtDestroyWidget(sourceIcon[0]);
- //OS.XtFree(pSourceIcon);
-
- dragContext = 0;
-
- if (convertProc != null)
- convertProc.dispose();
- convertProc = null;
-
- if (dragDropFinish != null)
- dragDropFinish.dispose();
- dragDropFinish = null;
-
- if (dropFinish != null)
- dropFinish.dispose();
- dropFinish = null;
-
- return 0;
-}
-private int dropFinishCallback(int widget, int client_data, int call_data) {
-
- XmDropFinishCallback data = new XmDropFinishCallback();
- OS.memmove(data, call_data, XmDropFinishCallback.sizeof);
-
- if (data.dropAction != OS.XmDROP || data.dropSiteStatus != OS.XmDROP_SITE_VALID) return 0;
-
- DNDEvent event = new DNDEvent();
- event.widget = this.control;
- event.time = data.timeStamp;
- if (moveRequested) {
- event.detail = DND.DROP_MOVE;
- } else {
- if (data.operation == OS.XmDROP_MOVE) {
- event.detail = DND.DROP_NONE;
- } else {
- event.detail = osOpToOp(data.operation);
- }
-
- }
- event.doit = (data.completionStatus != 0);
-
- try {
- notifyListeners(DND.DragEnd,event);
- } catch (Throwable err) {
- }
-
- moveRequested = false;
-
- 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;
-}
-/**
-* Gets the Display.
-*/
-public Display getDisplay () {
-
- if (control == null) DND.error(SWT.ERROR_WIDGET_DISPOSED);
- return control.getDisplay ();
-}
-/**
- * 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;
-}
-private void onDispose() {
- if (convertProc != null)
- convertProc.dispose();
- convertProc = null;
-
- if (dragDropFinish != null)
- dragDropFinish.dispose();
- dragDropFinish = null;
-
- if (dropFinish != null)
- dropFinish.dispose();
- dropFinish = null;
-
- if (control != null && controlListener != null) {
- control.removeListener(SWT.Dispose, controlListener);
- control.removeListener(SWT.DragDetect, controlListener);
- }
- control = null;
- controlListener = null;
- transferAgents = null;
-}
-private byte opToOsOp(int operation){
- byte osOperation = OS.XmDROP_NOOP;
-
- if ((operation & DND.DROP_COPY) == DND.DROP_COPY)
- osOperation |= OS.XmDROP_COPY;
- if ((operation & DND.DROP_MOVE) == DND.DROP_MOVE)
- osOperation |= OS.XmDROP_MOVE;
- if ((operation & DND.DROP_LINK) == DND.DROP_LINK)
- osOperation |= OS.XmDROP_LINK;
-
- return osOperation;
-}
-private int osOpToOp(byte osOperation){
- int operation = DND.DROP_NONE;
-
- if ((osOperation & OS.XmDROP_COPY) == OS.XmDROP_COPY)
- operation |= DND.DROP_COPY;
- if ((osOperation & OS.XmDROP_MOVE) == OS.XmDROP_MOVE)
- operation |= DND.DROP_MOVE;
- if ((osOperation & OS.XmDROP_LINK) == OS.XmDROP_LINK)
- operation |= DND.DROP_LINK;
-
- return operation;
-}
-/**
- * Removes the listener.
- *
- * @param listener the listener
- *
- * @exception SWTError
- * <ul><li>ERROR_THREAD_INVALID_ACCESS when called from the wrong thread</li>
- * <li>ERROR_WIDGET_DISPOSED when the widget has been disposed</li>
- * <li>ERROR_NULL_ARGUMENT when listener is null</li></ul>
- */
-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 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.
- */
-public void setTransfer(Transfer[] transferAgents){
- this.transferAgents = transferAgents;
-}
-
-
-protected void checkSubclass () {
- String name = getClass().getName ();
- String validName = DragSource.class.getName();
- if (!validName.equals(name)) {
- DND.error (SWT.ERROR_INVALID_SUBCLASS);
- }
-}
-}

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