/[pcsx2_0.9.7]/branch/r3113_0.9.7_beta/3rdparty/wxWidgets/src/msw/ole/dropsrc.cpp
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Contents of /branch/r3113_0.9.7_beta/3rdparty/wxWidgets/src/msw/ole/dropsrc.cpp

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Revision 32 - (show annotations) (download)
Tue Sep 7 03:29:01 2010 UTC (9 years, 11 months ago) by william
File size: 7766 byte(s)
branching from upstream revision (http://pcsx2.googlecode.com/svn/trunk
): r3113 to
https://svn.netsolutions.dnsalias.com/websvn/ps2/pcsx2/pcsx2_0.9.7/branch/r3113_0.9.7_beta
1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: src/msw/ole/dropsrc.cpp
3 // Purpose: implementation of wxIDropSource and wxDropSource
4 // Author: Vadim Zeitlin
5 // Modified by:
6 // Created: 10.05.98
7 // RCS-ID: $Id: dropsrc.cpp 38920 2006-04-26 08:21:31Z ABX $
8 // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
9 // Licence: wxWindows licence
10 ///////////////////////////////////////////////////////////////////////////////
11
12 // ============================================================================
13 // declarations
14 // ============================================================================
15
16 // ----------------------------------------------------------------------------
17 // headers
18 // ----------------------------------------------------------------------------
19
20 // For compilers that support precompilation, includes "wx.h".
21 #include "wx/wxprec.h"
22
23 #if defined(__BORLANDC__)
24 #pragma hdrstop
25 #endif
26
27 #if wxUSE_OLE && wxUSE_DRAG_AND_DROP
28
29 #ifndef WX_PRECOMP
30 #include "wx/window.h"
31 #include "wx/log.h"
32 #endif
33
34 #include "wx/dnd.h"
35
36 #include "wx/msw/private.h"
37
38 // for some compilers, the entire ole2.h must be included, not only oleauto.h
39 #if wxUSE_NORLANDER_HEADERS || defined(__WATCOMC__) || defined(__WXWINCE__)
40 #include <ole2.h>
41 #endif
42
43 #include <oleauto.h>
44
45 #include "wx/msw/ole/oleutils.h"
46
47 // ----------------------------------------------------------------------------
48 // wxIDropSource implementation of IDropSource interface
49 // ----------------------------------------------------------------------------
50
51 class wxIDropSource : public IDropSource
52 {
53 public:
54 wxIDropSource(wxDropSource *pDropSource);
55 virtual ~wxIDropSource() { }
56
57 // IDropSource
58 STDMETHODIMP QueryContinueDrag(BOOL fEscapePressed, DWORD grfKeyState);
59 STDMETHODIMP GiveFeedback(DWORD dwEffect);
60
61 DECLARE_IUNKNOWN_METHODS;
62
63 private:
64 DWORD m_grfInitKeyState; // button which started the d&d operation
65 wxDropSource *m_pDropSource; // pointer to C++ class we belong to
66
67 DECLARE_NO_COPY_CLASS(wxIDropSource)
68 };
69
70 // ============================================================================
71 // Implementation
72 // ============================================================================
73
74 // ----------------------------------------------------------------------------
75 // wxIDropSource implementation
76 // ----------------------------------------------------------------------------
77 BEGIN_IID_TABLE(wxIDropSource)
78 ADD_IID(Unknown)
79 ADD_IID(DropSource)
80 END_IID_TABLE;
81
82 IMPLEMENT_IUNKNOWN_METHODS(wxIDropSource)
83
84 wxIDropSource::wxIDropSource(wxDropSource *pDropSource)
85 {
86 wxASSERT( pDropSource != NULL );
87
88 m_pDropSource = pDropSource;
89 m_grfInitKeyState = 0;
90 }
91
92 // Name : wxIDropSource::QueryContinueDrag
93 // Purpose : decide if drag operation must be continued or not
94 // Returns : HRESULT: S_OK if we should continue
95 // DRAGDROP_S_DROP to drop right now
96 // DRAGDROP_S_CANCEL to cancel everything
97 // Params : [in] BOOL fEscapePressed <Esc> pressed since last call?
98 // [in] DWORD grfKeyState mask containing state of kbd keys
99 // Notes : as there is no reasonably simple portable way to implement this
100 // function, we currently don't give the possibility to override the
101 // default behaviour implemented here
102 STDMETHODIMP wxIDropSource::QueryContinueDrag(BOOL fEscapePressed,
103 DWORD grfKeyState)
104 {
105 if ( fEscapePressed )
106 return DRAGDROP_S_CANCEL;
107
108 // initialize ourself with the drag begin button
109 if ( m_grfInitKeyState == 0 ) {
110 m_grfInitKeyState = grfKeyState & (MK_LBUTTON | MK_RBUTTON | MK_MBUTTON);
111 }
112
113 if ( !(grfKeyState & m_grfInitKeyState) ) {
114 // button which started d&d released, go!
115 return DRAGDROP_S_DROP;
116 }
117
118 return S_OK;
119 }
120
121 // Name : wxIDropSource::GiveFeedback
122 // Purpose : give UI feedback according to current state of operation
123 // Returns : STDMETHODIMP
124 // Params : [in] DWORD dwEffect - what would happen if we dropped now
125 // Notes : default implementation is ok in more than 99% of cases
126 STDMETHODIMP wxIDropSource::GiveFeedback(DWORD dwEffect)
127 {
128 wxDragResult effect;
129 if ( dwEffect & DROPEFFECT_COPY )
130 effect = wxDragCopy;
131 else if ( dwEffect & DROPEFFECT_MOVE )
132 effect = wxDragMove;
133 else
134 effect = wxDragNone;
135
136 if ( m_pDropSource->GiveFeedback(effect) )
137 return S_OK;
138
139 return DRAGDROP_S_USEDEFAULTCURSORS;
140 }
141
142 // ----------------------------------------------------------------------------
143 // wxDropSource implementation
144 // ----------------------------------------------------------------------------
145
146 // ctors
147
148 // common part of all ctors
149 void wxDropSource::Init()
150 {
151 m_pIDropSource = new wxIDropSource(this);
152 m_pIDropSource->AddRef();
153 }
154
155 wxDropSource::wxDropSource(wxWindow* WXUNUSED(win),
156 const wxCursor &cursorCopy,
157 const wxCursor &cursorMove,
158 const wxCursor &cursorStop)
159 : wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
160 {
161 Init();
162 }
163
164 wxDropSource::wxDropSource(wxDataObject& data,
165 wxWindow* WXUNUSED(win),
166 const wxCursor &cursorCopy,
167 const wxCursor &cursorMove,
168 const wxCursor &cursorStop)
169 : wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
170 {
171 Init();
172 SetData(data);
173 }
174
175 wxDropSource::~wxDropSource()
176 {
177 m_pIDropSource->Release();
178 }
179
180 // Name : DoDragDrop
181 // Purpose : start drag and drop operation
182 // Returns : wxDragResult - the code of performed operation
183 // Params : [in] int flags: specifies if moving is allowe (or only copying)
184 // Notes : you must call SetData() before if you had used def ctor
185 wxDragResult wxDropSource::DoDragDrop(int flags)
186 {
187 wxCHECK_MSG( m_data != NULL, wxDragNone, wxT("No data in wxDropSource!") );
188
189 DWORD dwEffect;
190 HRESULT hr = ::DoDragDrop(m_data->GetInterface(),
191 m_pIDropSource,
192 (flags & wxDrag_AllowMove)
193 ? DROPEFFECT_COPY | DROPEFFECT_MOVE
194 : DROPEFFECT_COPY,
195 &dwEffect);
196
197 if ( hr == DRAGDROP_S_CANCEL ) {
198 return wxDragCancel;
199 }
200 else if ( hr == DRAGDROP_S_DROP ) {
201 if ( dwEffect & DROPEFFECT_COPY ) {
202 return wxDragCopy;
203 }
204 else if ( dwEffect & DROPEFFECT_MOVE ) {
205 // consistency check: normally, we shouldn't get "move" at all
206 // here if we don't allow it, but in practice it does happen quite often
207 return (flags & wxDrag_AllowMove) ? wxDragMove : wxDragCopy;
208 }
209 else {
210 // not copy or move
211 return wxDragNone;
212 }
213 }
214 else {
215 if ( FAILED(hr) ) {
216 wxLogApiError(wxT("DoDragDrop"), hr);
217 wxLogError(wxT("Drag & drop operation failed."));
218 }
219 else {
220 wxLogDebug(wxT("Unexpected success return code %08lx from DoDragDrop."),
221 hr);
222 }
223
224 return wxDragError;
225 }
226 }
227
228 // Name : wxDropSource::GiveFeedback
229 // Purpose : visually inform the user about d&d operation state
230 // Returns : bool: true if we do all ourselves or false for default feedback
231 // Params : [in] DragResult effect - what would happen if we dropped now
232 // Notes : here we just leave this stuff for default implementation
233 bool wxDropSource::GiveFeedback(wxDragResult effect)
234 {
235 const wxCursor& cursor = GetCursor(effect);
236 if ( cursor.Ok() )
237 {
238 ::SetCursor((HCURSOR)cursor.GetHCURSOR());
239
240 return true;
241 }
242 else
243 {
244 return false;
245 }
246 }
247
248 #endif // wxUSE_OLE && wxUSE_DRAG_AND_DROP

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