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41
42#ifndef QDND_P_H
43#define QDND_P_H
44
45//
46// W A R N I N G
47// -------------
48//
49// This file is not part of the Qt API. It exists for the convenience
50// of other Qt classes. This header file may change from version to
51// version without notice, or even be removed.
52//
53// We mean it.
54//
55
56#include "QtCore/qobject.h"
57#include "QtCore/qmap.h"
58#include "QtGui/qmime.h"
59#include "QtGui/qdrag.h"
60#include "QtGui/qpixmap.h"
61#include "QtGui/qcursor.h"
62#include "QtCore/qpoint.h"
63#include "private/qobject_p.h"
64#ifdef Q_WS_MAC
65# include "private/qt_mac_p.h"
66#endif
67
68#if defined(Q_WS_WIN)
69# include <qt_windows.h>
70# include <objidl.h>
71#endif
72
73QT_BEGIN_NAMESPACE
74
75class QEventLoop;
76
77#if !(defined(QT_NO_DRAGANDDROP) && defined(QT_NO_CLIPBOARD))
78
79class Q_GUI_EXPORT QInternalMimeData : public QMimeData
80{
81 Q_OBJECT
82public:
83 QInternalMimeData();
84 ~QInternalMimeData();
85
86 bool hasFormat(const QString &mimeType) const;
87 QStringList formats() const;
88 static bool canReadData(const QString &mimeType);
89
90
91 static QStringList formatsHelper(const QMimeData *data);
92 static bool hasFormatHelper(const QString &mimeType, const QMimeData *data);
93 static QByteArray renderDataHelper(const QString &mimeType, const QMimeData *data);
94
95protected:
96 QVariant retrieveData(const QString &mimeType, QVariant::Type type) const;
97
98 virtual bool hasFormat_sys(const QString &mimeType) const = 0;
99 virtual QStringList formats_sys() const = 0;
100 virtual QVariant retrieveData_sys(const QString &mimeType, QVariant::Type type) const = 0;
101};
102
103#ifdef Q_WS_WIN
104class QOleDataObject : public IDataObject
105{
106public:
107 explicit QOleDataObject(QMimeData *mimeData);
108 virtual ~QOleDataObject();
109
110 void releaseQt();
111 const QMimeData *mimeData() const;
112 DWORD reportedPerformedEffect() const;
113
114 // IUnknown methods
115 STDMETHOD(QueryInterface)(REFIID riid, void FAR* FAR* ppvObj);
116 STDMETHOD_(ULONG,AddRef)(void);
117 STDMETHOD_(ULONG,Release)(void);
118
119 // IDataObject methods
120 STDMETHOD(GetData)(LPFORMATETC pformatetcIn, LPSTGMEDIUM pmedium);
121 STDMETHOD(GetDataHere)(LPFORMATETC pformatetc, LPSTGMEDIUM pmedium);
122 STDMETHOD(QueryGetData)(LPFORMATETC pformatetc);
123 STDMETHOD(GetCanonicalFormatEtc)(LPFORMATETC pformatetc, LPFORMATETC pformatetcOut);
124 STDMETHOD(SetData)(LPFORMATETC pformatetc, STGMEDIUM FAR * pmedium,
125 BOOL fRelease);
126 STDMETHOD(EnumFormatEtc)(DWORD dwDirection, LPENUMFORMATETC FAR* ppenumFormatEtc);
127 STDMETHOD(DAdvise)(FORMATETC FAR* pFormatetc, DWORD advf,
128 LPADVISESINK pAdvSink, DWORD FAR* pdwConnection);
129 STDMETHOD(DUnadvise)(DWORD dwConnection);
130 STDMETHOD(EnumDAdvise)(LPENUMSTATDATA FAR* ppenumAdvise);
131
132private:
133 ULONG m_refs;
134 QPointer<QMimeData> data;
135 int CF_PERFORMEDDROPEFFECT;
136 DWORD performedEffect;
137};
138
139class QOleEnumFmtEtc : public IEnumFORMATETC
140{
141public:
142 explicit QOleEnumFmtEtc(const QVector<FORMATETC> &fmtetcs);
143 explicit QOleEnumFmtEtc(const QVector<LPFORMATETC> &lpfmtetcs);
144 virtual ~QOleEnumFmtEtc();
145
146 bool isNull() const;
147
148 // IUnknown methods
149 STDMETHOD(QueryInterface)(REFIID riid, void FAR* FAR* ppvObj);
150 STDMETHOD_(ULONG,AddRef)(void);
151 STDMETHOD_(ULONG,Release)(void);
152
153 // IEnumFORMATETC methods
154 STDMETHOD(Next)(ULONG celt, LPFORMATETC rgelt, ULONG FAR* pceltFetched);
155 STDMETHOD(Skip)(ULONG celt);
156 STDMETHOD(Reset)(void);
157 STDMETHOD(Clone)(LPENUMFORMATETC FAR* newEnum);
158
159private:
160 bool copyFormatEtc(LPFORMATETC dest, LPFORMATETC src) const;
161
162 ULONG m_dwRefs;
163 ULONG m_nIndex;
164 QVector<LPFORMATETC> m_lpfmtetcs;
165 bool m_isNull;
166};
167
168#endif
169
170#endif //QT_NO_DRAGANDDROP && QT_NO_CLIPBOARD
171
172#ifndef QT_NO_DRAGANDDROP
173
174class QDragPrivate : public QObjectPrivate
175{
176public:
177 QWidget *source;
178 QWidget *target;
179 QMimeData *data;
180 QPixmap pixmap;
181 QPoint hotspot;
182 Qt::DropActions possible_actions;
183 Qt::DropAction executed_action;
184 QMap<Qt::DropAction, QPixmap> customCursors;
185 Qt::DropAction defaultDropAction;
186};
187
188class QDropData : public QInternalMimeData
189{
190 Q_OBJECT
191public:
192 QDropData();
193 ~QDropData();
194
195protected:
196 bool hasFormat_sys(const QString &mimeType) const;
197 QStringList formats_sys() const;
198 QVariant retrieveData_sys(const QString &mimeType, QVariant::Type type) const;
199
200#if defined(Q_WS_WIN)
201public:
202 LPDATAOBJECT currentDataObject;
203#endif
204};
205
206class QDragManager: public QObject {
207 Q_OBJECT
208
209 QDragManager();
210 ~QDragManager();
211 // only friend classes can use QDragManager.
212 friend class QDrag;
213 friend class QDragMoveEvent;
214 friend class QDropEvent;
215 friend class QApplication;
216#ifdef Q_WS_MAC
217 friend class QWidgetPrivate; //dnd is implemented here
218#endif
219
220 bool eventFilter(QObject *, QEvent *);
221 void timerEvent(QTimerEvent*);
222
223public:
224 Qt::DropAction drag(QDrag *);
225
226 void cancel(bool deleteSource = true);
227 void move(const QPoint &);
228 void drop();
229 void updatePixmap();
230 QWidget *source() const { return object ? object->d_func()->source : 0; }
231 QDragPrivate *dragPrivate() const { return object ? object->d_func() : 0; }
232 static QDragPrivate *dragPrivate(QDrag *drag) { return drag ? drag->d_func() : 0; }
233
234 static QDragManager *self();
235 Qt::DropAction defaultAction(Qt::DropActions possibleActions,
236 Qt::KeyboardModifiers modifiers) const;
237
238 QDrag *object;
239
240 void updateCursor();
241
242 bool beingCancelled;
243 bool restoreCursor;
244 bool willDrop;
245 QEventLoop *eventLoop;
246
247 QPixmap dragCursor(Qt::DropAction action) const;
248
249 bool hasCustomDragCursors() const;
250
251 QDropData *dropData;
252
253 void emitActionChanged(Qt::DropAction newAction) { if (object) emit object->actionChanged(newAction); }
254
255 void setCurrentTarget(QWidget *target, bool dropped = false);
256 QWidget *currentTarget();
257
258#ifdef Q_WS_X11
259 QPixmap xdndMimeTransferedPixmap[2];
260 int xdndMimeTransferedPixmapIndex;
261#endif
262
263private:
264#if defined(Q_WS_QWS) || defined(Q_WS_QPA)
265 Qt::DropAction currentActionForOverrideCursor;
266#endif
267#ifdef Q_OS_SYMBIAN
268#ifndef QT_NO_CURSOR
269 QCursor overrideCursor;
270#endif
271#endif
272 QWidget *currentDropTarget;
273
274 static QDragManager *instance;
275 Q_DISABLE_COPY(QDragManager)
276};
277
278
279#if defined(Q_WS_WIN)
280
281class QOleDropTarget : public IDropTarget
282{
283public:
284 QOleDropTarget(QWidget* w);
285 virtual ~QOleDropTarget() {}
286
287 void releaseQt();
288
289 // IUnknown methods
290 STDMETHOD(QueryInterface)(REFIID riid, void FAR* FAR* ppvObj);
291 STDMETHOD_(ULONG, AddRef)(void);
292 STDMETHOD_(ULONG, Release)(void);
293
294 // IDropTarget methods
295 STDMETHOD(DragEnter)(LPDATAOBJECT pDataObj, DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect);
296 STDMETHOD(DragOver)(DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect);
297 STDMETHOD(DragLeave)();
298 STDMETHOD(Drop)(LPDATAOBJECT pDataObj, DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect);
299
300private:
301 ULONG m_refs;
302 QWidget* widget;
303 QPointer<QWidget> currentWidget;
304 QRect answerRect;
305 QPoint lastPoint;
306 DWORD chosenEffect;
307 DWORD lastKeyState;
308
309 void sendDragEnterEvent(QWidget *to, DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect);
310};
311
312#endif
313
314#if defined (Q_WS_MAC)
315class QCocoaDropData : public QInternalMimeData
316{
317 Q_OBJECT
318public:
319 QCocoaDropData(CFStringRef pasteboard);
320 ~QCocoaDropData();
321
322protected:
323 bool hasFormat_sys(const QString &mimeType) const;
324 QStringList formats_sys() const;
325 QVariant retrieveData_sys(const QString &mimeType, QVariant::Type type) const;
326public:
327 CFStringRef dropPasteboard;
328};
329#endif
330
331#endif // !QT_NO_DRAGANDDROP
332
333
334QT_END_NAMESPACE
335
336#endif // QDND_P_H
337