class wxWindow;
+class wxDataObject;
+class wxTextDataObject;
+class wxFileDataObject;
+
class wxDropTarget;
class wxTextDropTarget;
-class wxDragSource;
-class wxTextDragSource;
+class wxFileDropTarget;
+
+class wxDropSource;
+
+//-------------------------------------------------------------------------
+// wxDataObject
+//-------------------------------------------------------------------------
+
+class wxDataObject: public wxObject
+{
+public:
+ // all data formats (values are the same as in windows.h, do not change!)
+ enum StdFormat
+ {
+ Invalid,
+ Text,
+ Bitmap,
+ MetafilePict,
+ Sylk,
+ Dif,
+ Tiff,
+ OemText,
+ Dib,
+ Palette,
+ Pendata,
+ Riff,
+ Wave,
+ UnicodeText,
+ EnhMetafile,
+ Hdrop,
+ Locale,
+ Max
+ };
+
+ // function to return symbolic name of clipboard format (debug messages)
+ static const char *GetFormatName(wxDataFormat format);
+
+ // ctor & dtor
+ wxDataObject() {};
+ ~wxDataObject() {};
+
+ // pure virtuals to override
+ // get the best suited format for our data
+ virtual wxDataFormat GetPreferredFormat() const = 0;
+ // decide if we support this format (should be one of values of
+ // StdFormat enumerations or a user-defined format)
+ virtual bool IsSupportedFormat(wxDataFormat format) const = 0;
+ // get the (total) size of data
+ virtual size_t GetDataSize() const = 0;
+ // copy raw data to provided pointer
+ virtual void GetDataHere(void *pBuf) const = 0;
+
+};
+
+// ----------------------------------------------------------------------------
+// wxTextDataObject is a specialization of wxDataObject for text data
+// ----------------------------------------------------------------------------
+
+class wxTextDataObject : public wxDataObject
+{
+public:
+ // ctors
+ wxTextDataObject() { }
+ wxTextDataObject(const wxString& strText) : m_strText(strText) { }
+ void Init(const wxString& strText) { m_strText = strText; }
+
+ // implement base class pure virtuals
+ virtual wxDataFormat GetPreferredFormat() const
+ { return wxDF_TEXT; }
+ virtual bool IsSupportedFormat(wxDataFormat format) const
+ { return format == wxDF_TEXT; }
+ virtual size_t GetDataSize() const
+ { return m_strText.Len() + 1; } // +1 for trailing '\0'of course
+ virtual void GetDataHere(void *pBuf) const
+ { memcpy(pBuf, m_strText.c_str(), GetDataSize()); }
+
+private:
+ wxString m_strText;
+
+};
+// ----------------------------------------------------------------------------
+// wxFileDataObject is a specialization of wxDataObject for file names
+// ----------------------------------------------------------------------------
+
+class wxFileDataObject : public wxDataObject
+{
+public:
+
+ wxFileDataObject(void) { }
+ void AddFile( const wxString &file )
+ { m_files += file; m_files += ";"; }
+
+ // implement base class pure virtuals
+ virtual wxDataFormat GetPreferredFormat() const
+ { return wxDF_FILENAME; }
+ virtual bool IsSupportedFormat(wxDataFormat format) const
+ { return format == wxDF_FILENAME; }
+ virtual size_t GetDataSize() const
+ { return m_files.Len() + 1; } // +1 for trailing '\0'of course
+ virtual void GetDataHere(void *pBuf) const
+ { memcpy(pBuf, m_files.c_str(), GetDataSize()); }
+
+private:
+ wxString m_files;
+
+};
//-------------------------------------------------------------------------
// wxDropTarget
//-------------------------------------------------------------------------
wxDropTarget();
~wxDropTarget();
+
virtual void OnEnter() { }
virtual void OnLeave() { }
virtual bool OnDrop( long x, long y, const void *pData ) = 0;
- public:
-
+// protected:
+
+ friend wxWindow;
+
+ // Override these to indicate what kind of data you support:
+
+ virtual size_t GetFormatCount() const = 0;
+ virtual wxDataFormat GetFormat(size_t n) const = 0;
+
void Drop( GdkEvent *event, int x, int y );
- virtual void RegisterWidget( GtkWidget *widget ) = 0;
+ void RegisterWidget( GtkWidget *widget );
void UnregisterWidget( GtkWidget *widget );
};
wxTextDropTarget() {};
virtual bool OnDrop( long x, long y, const void *pData );
virtual bool OnDropText( long x, long y, const char *psz );
- virtual void RegisterWidget( GtkWidget *widget );
+
+ protected:
+
+ virtual size_t GetFormatCount() const;
+ virtual wxDataFormat GetFormat(size_t n) const;
};
-//-------------------------------------------------------------------------
-// wxDragSource
-//-------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// A drop target which accepts files (dragged from File Manager or Explorer)
+// ----------------------------------------------------------------------------
-class wxDragSource: public wxObject
+class wxFileDropTarget: public wxDropTarget
{
public:
+
+ wxFileDropTarget() {};
+
+ virtual bool OnDrop(long x, long y, const void *pData);
+ virtual bool OnDropFiles( long x, long y,
+ size_t nFiles, const char * const aszFiles[]);
- wxDragSource( wxWindow *win );
- ~wxDragSource(void);
- void SetData( char *data, long size );
- void Start( int x, int y );
-
- public:
-
- void ConnectWindow(void);
- void UnconnectWindow(void);
- virtual void RegisterWindow(void) = 0;
- void UnregisterWindow(void);
+ protected:
- GtkWidget *m_widget;
- wxWindow *m_window;
- char *m_data;
- long m_size;
- wxCursor m_defaultCursor;
- wxCursor m_goaheadCursor;
+ virtual size_t GetFormatCount() const;
+ virtual wxDataFormat GetFormat(size_t n) const;
};
//-------------------------------------------------------------------------
-// wxTextDragSource
+// wxDropSource
//-------------------------------------------------------------------------
-class wxTextDragSource: public wxDragSource
+class wxDropSource: public wxObject
{
public:
- wxTextDragSource( wxWindow *win ) : wxDragSource(win) {};
- void SetTextData( const wxString &text );
- void RegisterWindow(void);
+ enum DragResult
+ {
+ Error, // error prevented the d&d operation from completing
+ None, // drag target didn't accept the data
+ Copy, // the data was successfully copied
+ Move, // the data was successfully moved
+ Cancel // the operation was cancelled by user (not an error)
+ };
+
+ wxDropSource( wxWindow *win );
+ wxDropSource( wxDataObject &data, wxWindow *win );
+
+ ~wxDropSource(void);
- private:
+ void SetData( wxDataObject &data );
+ DragResult DoDragDrop( bool bAllowMove = FALSE );
+
+ virtual bool GiveFeedback( DragResult WXUNUSED(effect), bool WXUNUSED(bScrolling) ) { return TRUE; };
+
+ protected:
- wxString m_tmp;
+ friend void gtk_drag_callback( GtkWidget *widget, GdkEvent *event, wxDropSource *source );
+
+ void RegisterWindow(void);
+ void UnregisterWindow(void);
+
+ GtkWidget *m_widget;
+ wxWindow *m_window;
+ DragResult m_retValue;
+ wxDataObject *m_data;
+
+ wxCursor m_defaultCursor;
+ wxCursor m_goaheadCursor;
};
#endif
projects / wxWidgets.git / blobdiff