#if wxUSE_DRAG_AND_DROP
#include "wx/dataobj.h"
+#include "wx/cursor.h"
// ----------------------------------------------------------------------------
// constants
wxDragCancel // the operation was cancelled by user (not an error)
};
+inline WXDLLEXPORT bool wxIsDragResultOk(wxDragResult res)
+{
+ return res == wxDragCopy || res == wxDragMove;
+}
+
// ----------------------------------------------------------------------------
// wxDropSource is the object you need to create (and call DoDragDrop on it)
// to initiate a drag-and-drop operation
class WXDLLEXPORT wxDropSourceBase
{
public:
- wxDropSourceBase() { m_data = (wxDataObject *)NULL; }
+ wxDropSourceBase(const wxCursor &cursorCopy = wxNullCursor,
+ const wxCursor &cursorMove = wxNullCursor,
+ const wxCursor &cursorStop = wxNullCursor)
+ : m_cursorCopy(cursorCopy),
+ m_cursorMove(cursorMove),
+ m_cursorStop(cursorStop)
+ { m_data = (wxDataObject *)NULL; }
virtual ~wxDropSourceBase() { }
// set the data which is transfered by drag and drop
- void SetData(wxDataObject& data)
+ void SetData(wxDataObject& data)
{ m_data = &data; }
-
+
wxDataObject *GetDataObject()
{ return m_data; }
+ // set the icon corresponding to given drag result
+ void SetCursor(wxDragResult res, const wxCursor& cursor)
+ {
+ if ( res == wxDragCopy )
+ m_cursorCopy = cursor;
+ else if ( res == wxDragMove )
+ m_cursorMove = cursor;
+ else
+ m_cursorStop = cursor;
+ }
+
// start drag action, see enum wxDragResult for return value description
//
// if bAllowMove is TRUE, data can be moved, if not - only copied
virtual wxDragResult DoDragDrop(bool bAllowMove = FALSE) = 0;
// override to give feedback depending on the current operation result
- // "effect"
- virtual bool GiveFeedback( wxDragResult WXUNUSED(effect),
- bool WXUNUSED(bScrolling) )
+ // "effect" and return TRUE if you did something, FALSE to let the library
+ // give the default feedback
+ virtual bool GiveFeedback(wxDragResult WXUNUSED(effect)) { return FALSE; }
+
+protected:
+ const wxCursor& GetCursor(wxDragResult res) const
{
- return TRUE;
+ if ( res == wxDragCopy )
+ return m_cursorCopy;
+ else if ( res == wxDragMove )
+ return m_cursorMove;
+ else
+ return m_cursorStop;
}
-protected:
wxDataObject *m_data;
+
+ // the cursors to use for feedback
+ wxCursor m_cursorCopy, m_cursorMove, m_cursorStop;
};
// ----------------------------------------------------------------------------
wxDataObject *GetDataObject() const
{ return m_dataObject; }
void SetDataObject(wxDataObject *dataObject)
- { if (m_dataObject) delete m_dataObject;
- m_dataObject = dataObject; }
+ { if (m_dataObject) delete m_dataObject;
+ m_dataObject = dataObject; }
// these functions are called when data is moved over position (x, y) and
// may return either wxDragCopy, wxDragMove or wxDragNone depending on
virtual wxDragResult OnDragOver(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
wxDragResult def)
{ return def; }
-
+
// called when mouse leaves the window: might be used to remove the
// feedback which was given in OnEnter()
virtual void OnLeave() { }
-
+
// this function is called when data is dropped at position (x, y) - if it
// returns TRUE, OnData() will be called immediately afterwards which will
// allow to retrieve the data dropped.
// called after OnDrop() returns TRUE: you will usually just call
// GetData() from here and, probably, also refresh something to update the
- // new data
- virtual bool OnData(wxCoord x, wxCoord y) = 0;
+ // new data and, finally, return the code indicating how did the operation
+ // complete (returning default value in case of success and wxDragError on
+ // failure is usually ok)
+ virtual wxDragResult OnData(wxCoord x, wxCoord y, wxDragResult def) = 0;
// may be called *only* from inside OnData() and will fill m_dataObject
// with the data from the drop source if it returns TRUE
wxDataObject *m_dataObject;
};
-// ----------------------------------------------------------------------------
-// the platform-specific headers also define standard wxDropTarget
-// implementations wxTextDropTarget and wxFileDropTarget
-// ----------------------------------------------------------------------------
-
// ----------------------------------------------------------------------------
// include platform dependent class declarations
// ----------------------------------------------------------------------------
#include "wx/stubs/dnd.h"
#endif
+// ----------------------------------------------------------------------------
+// standard wxDropTarget implementations (implemented in common/dobjcmn.cpp)
+// ----------------------------------------------------------------------------
+
+// A simple wxDropTarget derived class for text data: you only need to
+// override OnDropText() to get something working
+class WXDLLEXPORT wxTextDropTarget : public wxDropTarget
+{
+public:
+ wxTextDropTarget();
+
+ virtual bool OnDropText(wxCoord x, wxCoord y, const wxString& text) = 0;
+
+ virtual wxDragResult OnData(wxCoord x, wxCoord y, wxDragResult def);
+};
+
+// A drop target which accepts files (dragged from File Manager or Explorer)
+class WXDLLEXPORT wxFileDropTarget : public wxDropTarget
+{
+public:
+ wxFileDropTarget();
+
+ // parameters are the number of files and the array of file names
+ virtual bool OnDropFiles(wxCoord x, wxCoord y,
+ const wxArrayString& filenames) = 0;
+
+ virtual wxDragResult OnData(wxCoord x, wxCoord y, wxDragResult def);
+};
+
#endif // wxUSE_DRAG_AND_DROP
#endif // _WX_DND_H_BASE_
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