projects/dwt-win: dwt/dnd/DragSource.d comparison

comparison dwt/dnd/DragSource.d @ 194:3afcd4ddcf90

Update to SWT 3.3.2

author	Frank Benoit <benoit@tionex.de>
date	Wed, 19 Mar 2008 21:48:31 +0100
parents	04e357b8343d
children	ab60f3309436

comparison

equal deleted inserted replaced

-:d0bbd290530f
+:3afcd4ddcf90
 Control control;
 Listener controlListener;
 Transfer[] transferAgents;
 DragSourceEffect dragEffect;
 Composite topControl;
+HWND hwndDrag;
 // ole interfaces
 _IDropSourceImpl iDropSource;
 _IDataObjectImpl iDataObject;
 int refCount;
 int dataEffect = DND.DROP_NONE;
 static const char[] DEFAULT_DRAG_SOURCE_EFFECT = "DEFAULT_DRAG_SOURCE_EFFECT"; //$NON-NLS-1$
 static const char[] DRAGSOURCEID = "DragSource"; //$NON-NLS-1$
 static const int CFSTR_PERFORMEDDROPEFFECT;
+static final TCHAR[] WindowClass = "#32770\0";
 static this(){
 CFSTR_PERFORMEDDROPEFFECT  = Transfer.registerType("Performed DropEffect");     //$NON-NLS-1$
 }
 /**
 * Creates a new <code>DragSource</code> to handle dragging from the specified <code>Control</code>.
 if (!event.doit || transferAgents is null || transferAgents.length is 0 ) return;
 uint[1] pdwEffect;
 int operations = opToOs(getStyle());
 Display display = control.getDisplay();
-char[] key = "org.eclipse.swt.internal.win32.runMessagesInIdle"; //$NON-NLS-1$
+char[] key = "dwt.internal.win32.runMessagesInIdle"; //$NON-NLS-1$
 Object oldValue = display.getData(key);
 display.setData(key, new ValueWrapperBool(true));
 ImageList imagelist = null;
 Image image = event.image;
+hwndDrag = null;
+topControl = null;
 if (image !is null) {
 imagelist = new ImageList(DWT.NONE);
 imagelist.add(image);
 topControl = control.getShell();
-OS.ImageList_BeginDrag(imagelist.getHandle(), 0, 0, 0);
+/*
-Point location = topControl.getLocation();
+* Bug in Windows. The image is inverted if the shell is RIGHT_TO_LEFT.
+* The fix is to create a transparent window that covers the shell client
+* area and use it during the drag to prevent the image from being inverted.
+* On XP if the shell is RTL, the image is not displayed.
+*/
+int offset = 0;
+hwndDrag = topControl.handle;
+if ((topControl.getStyle() & DWT.RIGHT_TO_LEFT) !is 0) {
+offset = image.getBounds().width;
+RECT rect;
+OS.GetClientRect (topControl.handle, &rect);
+hwndDrag = OS.CreateWindowEx (
+OS.WS_EX_TRANSPARENT | OS.WS_EX_NOINHERITLAYOUT,
+WindowClass.ptr,
+null,
+OS.WS_CHILD | OS.WS_CLIPSIBLINGS,
+0, 0,
+rect.right - rect.left, rect.bottom - rect.top,
+topControl.handle,
+null,
+OS.GetModuleHandle (null),
+null);
+OS.ShowWindow (hwndDrag, OS.SW_SHOW);
+}
+OS.ImageList_BeginDrag(imagelist.getHandle(), 0, offset, 0);
 /*
 * Feature in Windows. When ImageList_DragEnter() is called,
 * it takes a snapshot of the screen  If a drag is started
 * when another window is in front, then the snapshot will
 * contain part of the other window, causing pixel corruption.
 OS.UpdateWindow (topControl.handle);
 } else {
 int flags = OS.RDW_UPDATENOW | OS.RDW_ALLCHILDREN;
 OS.RedrawWindow (topControl.handle, null, null, flags);
 }
-OS.ImageList_DragEnter(topControl.handle, dragEvent.x - location.x, dragEvent.y - location.y);
+POINT pt;
-}
+pt.x = dragEvent.x;
-int result = COM.DoDragDrop(iDataObject, iDropSource, operations, pdwEffect.ptr);
+pt.y = dragEvent.y;
-if (imagelist !is null) {
+OS.MapWindowPoints (control.handle, null, &pt, 1);
-OS.ImageList_DragLeave(topControl.handle);
+RECT rect;
-OS.ImageList_EndDrag();
+OS.GetWindowRect (hwndDrag, &rect);
-imagelist.dispose();
+OS.ImageList_DragEnter(hwndDrag, pt.x - rect.left, pt.y - rect.top);
-topControl = null;
+}
-}
+int result = COM.DRAGDROP_S_CANCEL;
-display.setData(key, oldValue);
+try {
+result = COM.DoDragDrop(iDataObject, iDropSource, operations, pdwEffect.ptr);
+} finally {
+// ensure that we don't leave transparent window around
+if (hwndDrag !is null) {
+OS.ImageList_DragLeave(hwndDrag);
+OS.ImageList_EndDrag();
+imagelist.dispose();
+if (hwndDrag !is topControl.handle) OS.DestroyWindow(hwndDrag);
+hwndDrag = null;
+topControl = null;
+}
+display.setData(key, oldValue);
+}
 int operation = osToOp(pdwEffect[0]);
 if (dataEffect is DND.DROP_MOVE) {
 operation = (operation is DND.DROP_NONE || operation is DND.DROP_COPY) ? DND.DROP_TARGET_MOVE : DND.DROP_MOVE;
 } else {
 if (dataEffect !is DND.DROP_NONE) {
 package .LRESULT GiveFeedback(DWORD dwEffect) {
 return COM.DRAGDROP_S_USEDEFAULTCURSORS;
 }
 package .LRESULT QueryContinueDrag(int fEscapePressed, DWORD grfKeyState) {
+if (topControl !is null && topControl.isDisposed()) return COM.DRAGDROP_S_CANCEL;
 if (fEscapePressed !is 0){
-if (topControl !is null) OS.ImageList_DragLeave(topControl.handle);
+if (hwndDrag !is null) OS.ImageList_DragLeave(hwndDrag);
 return COM.DRAGDROP_S_CANCEL;
 }
 /*
 * Bug in Windows.  On some machines that do not have XBUTTONs,
 * the MK_XBUTTON1 and OS.MK_XBUTTON2 bits are sometimes set,
 * for the extra buttons only when they exist.
 */
 int mask = OS.MK_LBUTTON | OS.MK_MBUTTON | OS.MK_RBUTTON;
 //  if (display.xMouse) mask |= OS.MK_XBUTTON1 | OS.MK_XBUTTON2;
 if ((grfKeyState & mask) is 0) {
-if (topControl !is null) OS.ImageList_DragLeave(topControl.handle);
+if (hwndDrag !is null) OS.ImageList_DragLeave(hwndDrag);
 return COM.DRAGDROP_S_DROP;
 }
-if (topControl !is null) {
+if (hwndDrag !is null) {
-Display display = getDisplay();
+POINT pt;
-Point pt = display.getCursorLocation();
+OS.GetCursorPos (&pt);
-Point location = topControl.getLocation();
+RECT rect;
-OS.ImageList_DragMove(pt.x - location.x, pt.y - location.y);
+OS.GetWindowRect (hwndDrag, &rect);
+OS.ImageList_DragMove (pt.x - rect.left, pt.y - rect.top);
 }
 return COM.S_OK;
 }
 private void onDispose() {

Mercurial > projects > dwt-win

comparison dwt/dnd/DragSource.d @ 194:3afcd4ddcf90