1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <com/sun/star/datatransfer/dnd/DNDConstants.hpp>
#include <com/sun/star/datatransfer/XTransferable.hpp>
#include <rtl/unload.h>
#include <stdio.h>
#include "target.hxx"
#include "idroptarget.hxx"
#include "globals.hxx"
#include "targetdropcontext.hxx"
#include "targetdragcontext.hxx"
#include <rtl/ustring.h>
using namespace cppu;
using namespace osl;
using namespace com::sun::star::datatransfer;
using namespace com::sun::star::datatransfer::dnd;
using namespace com::sun::star::datatransfer::dnd::DNDConstants;
#define WM_REGISTERDRAGDROP WM_USER + 1
#define WM_REVOKEDRAGDROP WM_USER + 2
//--> TRA
extern Reference< XTransferable > g_XTransferable;
//<-- TRA
extern rtl_StandardModuleCount g_moduleCount;
DWORD WINAPI DndTargetOleSTAFunc(LPVOID pParams);
DropTarget::DropTarget( const Reference<XComponentContext>& rxContext):
WeakComponentImplHelper3<XInitialization,XDropTarget, XServiceInfo>(m_mutex),
m_hWnd( NULL),
m_threadIdWindow(0),
m_threadIdTarget(0),
m_hOleThread(0),
m_oleThreadId( 0),
m_pDropTarget( NULL),
m_xContext( rxContext ),
m_bActive(sal_True),
m_nDefaultActions(ACTION_COPY|ACTION_MOVE|ACTION_LINK|ACTION_DEFAULT),
m_nCurrentDropAction( ACTION_NONE),
m_nLastDropAction(0),
m_bDropComplete(false)
{
g_moduleCount.modCnt.acquire( &g_moduleCount.modCnt );
}
DropTarget::~DropTarget()
{
g_moduleCount.modCnt.release( &g_moduleCount.modCnt );
}
// called from WeakComponentImplHelperX::dispose
// WeakComponentImplHelper calls disposing before it destroys
// itself.
// NOTE: RevokeDragDrop decrements the ref count on the IDropTarget
// interface. (m_pDropTarget)
// If the HWND is invalid then it doesn't decrement and
// the IDropTarget object will live on. MEMORY LEAK
void SAL_CALL DropTarget::disposing()
{
if( m_threadIdTarget)
{
// Call RevokeDragDrop and wait for the OLE thread to die;
PostThreadMessage( m_threadIdTarget, WM_REVOKEDRAGDROP, (WPARAM)this, 0);
WaitForSingleObject( m_hOleThread, INFINITE);
CloseHandle( m_hOleThread);
//OSL_ENSURE( SUCCEEDED( hr), "HWND not valid!" );
}
else
{
RevokeDragDrop( m_hWnd);
m_hWnd= 0;
}
if( m_pDropTarget)
{
CoLockObjectExternal( m_pDropTarget, FALSE, TRUE);
m_pDropTarget->Release();
}
if( m_oleThreadId)
{
if( m_oleThreadId == CoGetCurrentProcess() )
OleUninitialize();
}
}
void SAL_CALL DropTarget::initialize( const Sequence< Any >& aArguments )
throw(Exception, RuntimeException)
{
// The window must be registered for Dnd by RegisterDragDrop. We must ensure
// that RegisterDragDrop is called from an STA ( OleInitialize) thread.
// As long as the window is registered we need to receive OLE messages in
// an OLE thread. That is to say, if DropTarget::initialize was called from an
// MTA thread then we create an OLE thread in which the window is registered.
// The thread will stay alive until aver RevokeDragDrop has been called.
// Additionally even if RegisterDragDrop is called from an STA thread we have
// to ensure that it is called from the same thread that created the Window
// otherwise meesages sent during DND won't reach the windows message queue.
// Calling AttachThreadInput first would resolve this problem but would block
// the message queue of the calling thread. So if the current thread
// (even if it's an STA thread) and the thread that created the window are not
// identical we need to create a new thread as we do when the calling thread is
// an MTA thread.
if( aArguments.getLength() > 0)
{
// Get the window handle from aArgument. It is needed for RegisterDragDrop.
m_hWnd= *(HWND*)aArguments[0].getValue();
OSL_ASSERT( IsWindow( m_hWnd) );
// Obtain the id of the thread that created the window
m_threadIdWindow= GetWindowThreadProcessId( m_hWnd, NULL);
HRESULT hr= OleInitialize( NULL);
// Current thread is MTA or Current thread and Window thread are not identical
if( hr == RPC_E_CHANGED_MODE || GetCurrentThreadId() != m_threadIdWindow )
{
OSL_ENSURE( ! m_threadIdTarget,"initialize was called twice");
// create the IDropTargetImplementation
m_pDropTarget= new IDropTargetImpl( *static_cast<DropTarget*>( this) );
m_pDropTarget->AddRef();
// Obtain the id of the thread that created the window
m_threadIdWindow= GetWindowThreadProcessId( m_hWnd, NULL);
// The event is set by the thread that we will create momentarily.
// It indicates that the thread is ready to receive messages.
HANDLE m_evtThreadReady= CreateEvent( NULL, FALSE, FALSE, NULL);
m_hOleThread= CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)DndTargetOleSTAFunc,
&m_evtThreadReady, 0, &m_threadIdTarget);
WaitForSingleObject( m_evtThreadReady, INFINITE);
CloseHandle( m_evtThreadReady);
PostThreadMessage( m_threadIdTarget, WM_REGISTERDRAGDROP, (WPARAM)static_cast<DropTarget*>(this), 0);
}
else if( hr == S_OK || hr == S_FALSE)
{
// current thread is STA
// If OleInitialize has been called by the caller then we must not call
// OleUninitialize
if( hr == S_OK)
{
// caller did not call OleInitialize, so we call OleUninitialize
// remember the thread that will call OleUninitialize
m_oleThreadId= CoGetCurrentProcess(); // get a unique thread id
}
// Get the window handle from aArgument. It is needed for RegisterDragDrop.
// create the IDropTargetImplementation
m_pDropTarget= new IDropTargetImpl( *static_cast<DropTarget*>( this) );
m_pDropTarget->AddRef();
// CoLockObjectExternal is prescribed by the protocol. It bumps up the ref count
if( SUCCEEDED( CoLockObjectExternal( m_pDropTarget, TRUE, FALSE)))
{
if( FAILED( RegisterDragDrop( m_hWnd, m_pDropTarget) ) )
{
// do clean up if drag and drop is not possible
CoLockObjectExternal( m_pDropTarget, FALSE, FALSE);
m_pDropTarget->Release();
m_hWnd= NULL;
}
}
}
else
throw Exception();
}
}
// This function is called as extra thread from DragSource::startDrag.
// The function carries out a drag and drop operation by calling
// DoDragDrop. The thread also notifies all XSourceListener.
DWORD WINAPI DndTargetOleSTAFunc(LPVOID pParams)
{
HRESULT hr= OleInitialize( NULL);
if( SUCCEEDED( hr) )
{
MSG msg;
// force the creation of a message queue
PeekMessage( &msg, (HWND)NULL, 0, 0, PM_NOREMOVE);
// Signal the creator ( DropTarget::initialize) that the thread is
// ready to receive messages.
SetEvent( *(HANDLE*) pParams);
// Thread id is needed for attaching this message queue to the one of the
// thread where the window was created.
DWORD threadId= GetCurrentThreadId();
// We force the creation of a thread message queue. This is necessary
// for a later call to AttachThreadInput
while( GetMessage(&msg, (HWND)NULL, 0, 0) )
{
if( msg.message == WM_REGISTERDRAGDROP)
{
DropTarget *pTarget= (DropTarget*)msg.wParam;
// This thread is attached to the thread that created the window. Hence
// this thread also receives all mouse and keyboard messages which are
// needed
AttachThreadInput( threadId , pTarget->m_threadIdWindow, TRUE );
if( SUCCEEDED( CoLockObjectExternal(pTarget-> m_pDropTarget, TRUE, FALSE)))
{
if( FAILED( RegisterDragDrop( pTarget-> m_hWnd, pTarget-> m_pDropTarget) ) )
{
// do clean up if drag and drop is not possible
CoLockObjectExternal( pTarget->m_pDropTarget, FALSE, FALSE);
pTarget->m_pDropTarget->Release();
pTarget->m_hWnd= NULL;
}
}
}
else if( msg.message == WM_REVOKEDRAGDROP)
{
DropTarget *pTarget= (DropTarget*)msg.wParam;
RevokeDragDrop( pTarget-> m_hWnd);
// Detach this thread from the window thread
AttachThreadInput( threadId, pTarget->m_threadIdWindow, FALSE);
pTarget->m_hWnd= 0;
break;
}
TranslateMessage( &msg);
DispatchMessage( &msg);
}
OleUninitialize();
}
return 0;
}
// XServiceInfo
OUString SAL_CALL DropTarget::getImplementationName( ) throw (RuntimeException)
{
return OUString(RTL_CONSTASCII_USTRINGPARAM(DNDTARGET_IMPL_NAME));
}
// XServiceInfo
sal_Bool SAL_CALL DropTarget::supportsService( const OUString& ServiceName ) throw (RuntimeException)
{
if( ServiceName == DNDTARGET_SERVICE_NAME )
return sal_True;
return sal_False;
}
Sequence< OUString > SAL_CALL DropTarget::getSupportedServiceNames( ) throw (RuntimeException)
{
OUString names[1]= {OUString(RTL_CONSTASCII_USTRINGPARAM(DNDTARGET_SERVICE_NAME))};
return Sequence<OUString>(names, 1);
}
// XDropTarget ----------------------------------------------------------------
void SAL_CALL DropTarget::addDropTargetListener( const Reference< XDropTargetListener >& dtl )
throw(RuntimeException)
{
rBHelper.addListener( ::getCppuType( &dtl ), dtl );
}
void SAL_CALL DropTarget::removeDropTargetListener( const Reference< XDropTargetListener >& dtl )
throw(RuntimeException)
{
rBHelper.removeListener( ::getCppuType( &dtl ), dtl );
}
sal_Bool SAL_CALL DropTarget::isActive( ) throw(RuntimeException)
{
return m_bActive; //m_bDropTargetRegistered;
}
void SAL_CALL DropTarget::setActive( sal_Bool _b ) throw(RuntimeException)
{
MutexGuard g(m_mutex);
m_bActive= _b;
}
sal_Int8 SAL_CALL DropTarget::getDefaultActions( ) throw(RuntimeException)
{
return m_nDefaultActions;
}
void SAL_CALL DropTarget::setDefaultActions( sal_Int8 actions ) throw(RuntimeException)
{
OSL_ENSURE( actions < 8, "No valid default actions");
m_nDefaultActions= actions;
}
HRESULT DropTarget::DragEnter( IDataObject *pDataObj,
DWORD grfKeyState,
POINTL pt,
DWORD *pdwEffect)
{
#if defined DBG_CONSOLE_OUT
printf("\nDropTarget::DragEnter state: %x effect %d", grfKeyState, *pdwEffect);
#endif
if( m_bActive )
{
// Intersection of pdwEffect and the allowed actions ( setDefaultActions)
m_nCurrentDropAction= getFilteredActions( grfKeyState, *pdwEffect);
// m_nLastDropAction has to be set by a listener. If no listener calls
//XDropTargetDragContext::acceptDrag and specifies an action then pdwEffect
// will be DROPEFFECT_NONE throughout
m_nLastDropAction= ACTION_DEFAULT | ACTION_MOVE;
m_currentDragContext= static_cast<XDropTargetDragContext*>( new TargetDragContext(
static_cast<DropTarget*>(this) ) );
//--> TRA
// shortcut
if ( g_XTransferable.is( ) )
m_currentData = g_XTransferable;
else
{
// Convert the IDataObject to a XTransferable
m_currentData= m_aDataConverter.createTransferableFromDataObj(
m_xContext, IDataObjectPtr(pDataObj));
}
//<-- TRA
if( m_nCurrentDropAction != ACTION_NONE)
{
DropTargetDragEnterEvent e;
e.SupportedDataFlavors= m_currentData->getTransferDataFlavors();
e.DropAction= m_nCurrentDropAction;
e.Source= Reference<XInterface>( static_cast<XDropTarget*>(this),UNO_QUERY);
e.Context= m_currentDragContext;
POINT point={ pt.x, pt.y};
ScreenToClient( m_hWnd, &point);
e.LocationX= point.x;
e.LocationY= point.y;
e.SourceActions= dndOleDropEffectsToActions( *pdwEffect);
fire_dragEnter( e);
// Check if the action derived from grfKeyState (m_nCurrentDropAction) or the action set
// by the listener (m_nCurrentDropAction) is allowed by the source. Only a allowed action is set
// in pdwEffect. The listener notification is asynchron, that is we cannot expext that the listener
// has already reacted to the notification.
// If there is more then one valid action which is the case when ALT or RIGHT MOUSE BUTTON is pressed
// then getDropEffect returns DROPEFFECT_MOVE which is the default value if no other modifier is pressed.
// On drop the target should present the user a dialog from which the user may change the action.
sal_Int8 allowedActions= dndOleDropEffectsToActions( *pdwEffect);
*pdwEffect= dndActionsToSingleDropEffect( m_nLastDropAction & allowedActions);
}
else
{
*pdwEffect= DROPEFFECT_NONE;
}
}
return S_OK;
}
HRESULT DropTarget::DragOver( DWORD grfKeyState,
POINTL pt,
DWORD *pdwEffect)
{
if( m_bActive)
{
m_nCurrentDropAction= getFilteredActions( grfKeyState, *pdwEffect);
if( m_nCurrentDropAction)
{
DropTargetDragEvent e;
e.DropAction= m_nCurrentDropAction;
e.Source= Reference<XInterface>(static_cast<XDropTarget*>(this),UNO_QUERY);
e.Context= m_currentDragContext;
POINT point={ pt.x, pt.y};
ScreenToClient( m_hWnd, &point);
e.LocationX= point.x;
e.LocationY= point.y;
e.SourceActions= dndOleDropEffectsToActions( *pdwEffect);
// if grfKeyState has changed since the last DragOver then fire events.
// A listener might change m_nCurrentDropAction by calling the
// XDropTargetDragContext::acceptDrag function. But this is not important
// because in the afterwards fired dragOver event the action reflects
// grgKeyState again.
if( m_nLastDropAction != m_nCurrentDropAction)
fire_dropActionChanged( e);
// The Event contains a XDropTargetDragContext implementation.
fire_dragOver( e);
// Check if the action derived from grfKeyState (m_nCurrentDropAction) or the action set
// by the listener (m_nCurrentDropAction) is allowed by the source. Only a allowed action is set
// in pdwEffect. The listener notification is asynchron, that is we cannot expext that the listener
// has already reacted to the notification.
// If there is more then one valid action which is the case when ALT or RIGHT MOUSE BUTTON is pressed
// then getDropEffect returns DROPEFFECT_MOVE which is the default value if no other modifier is pressed.
// On drop the target should present the user a dialog from which the user may change the action.
sal_Int8 allowedActions= dndOleDropEffectsToActions( *pdwEffect);
// set the last action to the current if listener has not changed the value yet
*pdwEffect= dndActionsToSingleDropEffect( m_nLastDropAction & allowedActions);
}
else
{
*pdwEffect= DROPEFFECT_NONE;
}
}
#if defined DBG_CONSOLE_OUT
printf("\nDropTarget::DragOver %d", *pdwEffect );
#endif
return S_OK;
}
HRESULT DropTarget::DragLeave( void)
{
#if defined DBG_CONSOLE_OUT
printf("\nDropTarget::DragLeave");
#endif
if( m_bActive)
{
m_currentData=0;
m_currentDragContext= 0;
m_currentDropContext= 0;
m_nLastDropAction= 0;
if( m_nDefaultActions != ACTION_NONE)
{
DropTargetEvent e;
e.Source= static_cast<XDropTarget*>(this);
fire_dragExit( e);
}
}
return S_OK;
}
HRESULT DropTarget::Drop( IDataObject * /*pDataObj*/,
DWORD grfKeyState,
POINTL pt,
DWORD *pdwEffect)
{
#if defined DBG_CONSOLE_OUT
printf("\nDropTarget::Drop");
#endif
if( m_bActive)
{
m_bDropComplete= sal_False;
m_nCurrentDropAction= getFilteredActions( grfKeyState, *pdwEffect);
m_currentDropContext= static_cast<XDropTargetDropContext*>( new TargetDropContext( static_cast<DropTarget*>(this )) );
if( m_nCurrentDropAction)
{
DropTargetDropEvent e;
e.DropAction= m_nCurrentDropAction;
e.Source= Reference<XInterface>( static_cast<XDropTarget*>(this), UNO_QUERY);
e.Context= m_currentDropContext;
POINT point={ pt.x, pt.y};
ScreenToClient( m_hWnd, &point);
e.LocationX= point.x;
e.LocationY= point.y;
e.SourceActions= dndOleDropEffectsToActions( *pdwEffect);
e.Transferable= m_currentData;
fire_drop( e);
//if fire_drop returns than a listener might have modified m_nCurrentDropAction
if( m_bDropComplete == sal_True)
{
sal_Int8 allowedActions= dndOleDropEffectsToActions( *pdwEffect);
*pdwEffect= dndActionsToSingleDropEffect( m_nCurrentDropAction & allowedActions);
}
else
*pdwEffect= DROPEFFECT_NONE;
}
else
*pdwEffect= DROPEFFECT_NONE;
m_currentData= 0;
m_currentDragContext= 0;
m_currentDropContext= 0;
m_nLastDropAction= 0;
}
return S_OK;
}
void DropTarget::fire_drop( const DropTargetDropEvent& dte)
{
OInterfaceContainerHelper* pContainer= rBHelper.getContainer( getCppuType( (Reference<XDropTargetListener>* )0 ) );
if( pContainer)
{
OInterfaceIteratorHelper iter( *pContainer);
while( iter.hasMoreElements())
{
Reference<XDropTargetListener> listener( static_cast<XDropTargetListener*>( iter.next()));
listener->drop( dte);
}
}
}
void DropTarget::fire_dragEnter( const DropTargetDragEnterEvent& e )
{
OInterfaceContainerHelper* pContainer= rBHelper.getContainer( getCppuType( (Reference<XDropTargetListener>* )0 ) );
if( pContainer)
{
OInterfaceIteratorHelper iter( *pContainer);
while( iter.hasMoreElements())
{
Reference<XDropTargetListener> listener( static_cast<XDropTargetListener*>( iter.next()));
listener->dragEnter( e);
}
}
}
void DropTarget::fire_dragExit( const DropTargetEvent& dte )
{
OInterfaceContainerHelper* pContainer= rBHelper.getContainer( getCppuType( (Reference<XDropTargetListener>* )0 ) );
if( pContainer)
{
OInterfaceIteratorHelper iter( *pContainer);
while( iter.hasMoreElements())
{
Reference<XDropTargetListener> listener( static_cast<XDropTargetListener*>( iter.next()));
listener->dragExit( dte);
}
}
}
void DropTarget::fire_dragOver( const DropTargetDragEvent& dtde )
{
OInterfaceContainerHelper* pContainer= rBHelper.getContainer( getCppuType( (Reference<XDropTargetListener>* )0 ) );
if( pContainer)
{
OInterfaceIteratorHelper iter( *pContainer );
while( iter.hasMoreElements())
{
Reference<XDropTargetListener> listener( static_cast<XDropTargetListener*>( iter.next()));
listener->dragOver( dtde);
}
}
}
void DropTarget::fire_dropActionChanged( const DropTargetDragEvent& dtde )
{
OInterfaceContainerHelper* pContainer= rBHelper.getContainer( getCppuType( (Reference<XDropTargetListener>* )0 ) );
if( pContainer)
{
OInterfaceIteratorHelper iter( *pContainer);
while( iter.hasMoreElements())
{
Reference<XDropTargetListener> listener( static_cast<XDropTargetListener*>( iter.next()));
listener->dropActionChanged( dtde);
}
}
}
// Non - interface functions ============================================================
// DropTarget fires events to XDropTargetListeners. The event object contains an
// XDropTargetDropContext implementaion. When the listener calls on that interface
// then the calls are delegated from DropContext (XDropTargetDropContext) to these
// functions.
// Only one listener which visible area is affected is allowed to call on
// XDropTargetDropContext
// Returning sal_False would cause the XDropTargetDropContext or ..DragContext implementation
// to throw an InvalidDNDOperationException, meaning that a Drag is not currently performed.
// return sal_False results in throwing a InvalidDNDOperationException in the caller.
void DropTarget::_acceptDrop(sal_Int8 dropOperation, const Reference<XDropTargetDropContext>& context)
{
if( context == m_currentDropContext)
{
m_nCurrentDropAction= dropOperation;
}
}
void DropTarget::_rejectDrop( const Reference<XDropTargetDropContext>& context)
{
if( context == m_currentDropContext)
{
m_nCurrentDropAction= ACTION_NONE;
}
}
void DropTarget::_dropComplete(sal_Bool success, const Reference<XDropTargetDropContext>& context)
{
if(context == m_currentDropContext)
{
m_bDropComplete= success;
}
}
// --------------------------------------------------------------------------------------
// DropTarget fires events to XDropTargetListeners. The event object can contains an
// XDropTargetDragContext implementaion. When the listener calls on that interface
// then the calls are delegated from DragContext (XDropTargetDragContext) to these
// functions.
// Only one listener which visible area is affected is allowed to call on
// XDropTargetDragContext
void DropTarget::_acceptDrag( sal_Int8 dragOperation, const Reference<XDropTargetDragContext>& context)
{
if( context == m_currentDragContext)
{
m_nLastDropAction= dragOperation;
}
}
void DropTarget::_rejectDrag( const Reference<XDropTargetDragContext>& context)
{
if(context == m_currentDragContext)
{
m_nLastDropAction= ACTION_NONE;
}
}
//--------------------------------------------------------------------------------------
// This function determines the action dependend on the pressed
// key modifiers ( CTRL, SHIFT, ALT, Right Mouse Button). The result
// is then checked against the allowed actions which can be set through
// XDropTarget::setDefaultActions. Only those values which are also
// default actions are returned. If setDefaultActions has not been called
// beforehand the default actions comprise all possible actions.
// params: grfKeyState - the modifier keys and mouse buttons currently pressed
inline sal_Int8 DropTarget::getFilteredActions( DWORD grfKeyState, DWORD dwEffect)
{
sal_Int8 actions= dndOleKeysToAction( grfKeyState, dndOleDropEffectsToActions( dwEffect));
return actions & m_nDefaultActions;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|