#endif
#include "wx/defs.h"
+
+#if wxUSE_DRAG_AND_DROP
+
#include "wx/object.h"
#include "wx/string.h"
+#include "wx/dataobj.h"
#include "wx/cursor.h"
+#include "wx/icon.h"
+#include "wx/gdicmn.h"
//-------------------------------------------------------------------------
// classes
class wxWindow;
-class wxDataObject;
-class wxTextDataObject;
-class wxFileDataObject;
-
class wxDropTarget;
class wxTextDropTarget;
class wxFileDropTarget;
+class wxPrivateDropTarget;
class wxDropSource;
//-------------------------------------------------------------------------
-// wxDataObject
+// wxDropTarget
//-------------------------------------------------------------------------
-class wxDataObject: public wxObject
-{
-public:
-
- wxDataObject() {};
- ~wxDataObject() {};
-
- virtual wxDataFormat GetPreferredFormat() const = 0;
- virtual bool IsSupportedFormat( wxDataFormat format ) const = 0;
- virtual size_t GetDataSize() const = 0;
- virtual void GetDataHere( void *data ) const = 0;
-
-};
-
-// ----------------------------------------------------------------------------
-// wxTextDataObject is a specialization of wxDataObject for text data
-// ----------------------------------------------------------------------------
-
-class wxTextDataObject : public wxDataObject
+class wxDropTarget: public wxObject
{
public:
- wxTextDataObject() { }
- wxTextDataObject(const wxString& strText) : m_strText(strText) { }
- void Init(const wxString& strText) { m_strText = strText; }
-
- virtual wxDataFormat GetPreferredFormat() const
- { return wxDF_TEXT; }
+ wxDropTarget();
+ ~wxDropTarget();
- virtual bool IsSupportedFormat(wxDataFormat format) const
- { return format == wxDF_TEXT; }
-
- virtual size_t GetDataSize() const
- { return m_strText.Len() + 1; } // +1 for trailing '\0'
+ /* may be overridden to react to events */
+ virtual void OnEnter();
+ virtual void OnLeave();
+
+ /* may be overridden to reject certain formats or drops
+ on certain areas. always returns TRUE by default
+ indicating that you'd accept the data from the drag. */
+ virtual bool OnMove( int x, int y );
- virtual void GetDataHere( void *data ) const
- { memcpy(data, m_strText.c_str(), GetDataSize()); }
-
-private:
- wxString m_strText;
+ /* has to be overridden to accept a drop event. call
+ IsSupported() to ask which formats are available
+ and then call RequestData() to indicate the format
+ you request. */
+ virtual bool OnDrop( int x, int y );
-};
-
-// ----------------------------------------------------------------------------
-// wxFileDataObject is a specialization of wxDataObject for file names
-// ----------------------------------------------------------------------------
+ /* this gets called once the data has actually arrived. get
+ it with GetData(). this has to be overridden. */
+ virtual bool OnData( int x, int y );
-class wxFileDataObject : public wxDataObject
-{
-public:
+ /* called from within OnDrop() to request a certain format
+ from the drop event. */
+ bool RequestData( wxDataFormat format );
- wxFileDataObject(void) { }
- void AddFile( const wxString &file )
- { m_files += file; m_files += '\0'; }
+ /* called to query what formats are available */
+ bool IsSupported( wxDataFormat format );
+
+ /* fill data with data from the dragging source */
+ bool GetData( wxDataObject *data );
- virtual wxDataFormat GetPreferredFormat() const
- { return wxDF_FILENAME; }
-
- virtual bool IsSupportedFormat( wxDataFormat format ) const
- { return format == wxDF_FILENAME; }
+// implementation
+
+ void RegisterWidget( GtkWidget *widget );
+ void UnregisterWidget( GtkWidget *widget );
- virtual size_t GetDataSize() const
- { return m_files.Len(); } // no trailing '\0'
+ GdkDragContext *m_dragContext;
+ GtkWidget *m_dragWidget;
+ GtkSelectionData *m_dragData;
+ guint m_dragTime;
+ bool m_firstMotion; /* gdk has no "gdk_drag_enter" event */
- virtual void GetDataHere( void *data ) const
- { memcpy(data, m_files.c_str(), GetDataSize()); }
-
-private:
- wxString m_files;
-
+ void SetDragContext( GdkDragContext *dc ) { m_dragContext = dc; }
+ void SetDragWidget( GtkWidget *w ) { m_dragWidget = w; }
+ void SetDragData( GtkSelectionData *sd ) { m_dragData = sd; }
+ void SetDragTime( guint time ) { m_dragTime = time; }
};
+
//-------------------------------------------------------------------------
-// wxDropTarget
+// wxTextDropTarget
//-------------------------------------------------------------------------
-class wxDropTarget: public wxObject
+class wxTextDropTarget: public wxDropTarget
{
- public:
+public:
- wxDropTarget();
- ~wxDropTarget();
-
- virtual void OnEnter() { }
- virtual void OnLeave() { }
- virtual bool OnDrop( long x, long y, const void *data, size_t size ) = 0;
+ wxTextDropTarget() {}
- // Override these to indicate what kind of data you support:
-
- virtual size_t GetFormatCount() const = 0;
- virtual wxDataFormat GetFormat(size_t n) const = 0;
-
- // implementation
-
- void RegisterWidget( GtkWidget *widget );
- void UnregisterWidget( GtkWidget *widget );
+ virtual bool OnMove( int x, int y );
+ virtual bool OnDrop( int x, int y );
+ virtual bool OnData( int x, int y );
+
+ /* you have to override OnDropData to get at the text */
+ virtual bool OnDropText( int x, int y, const wxChar *text ) = 0;
+
};
//-------------------------------------------------------------------------
-// wxTextDropTarget
+// wxPrivateDropTarget
//-------------------------------------------------------------------------
-class wxTextDropTarget: public wxDropTarget
+class wxPrivateDropTarget: public wxDropTarget
{
- public:
+public:
- wxTextDropTarget() {};
- virtual bool OnDrop( long x, long y, const void *data, size_t size );
- virtual bool OnDropText( long x, long y, const char *psz );
-
- protected:
+ /* sets id to "application/myprogram" where "myprogram" is the
+ same as wxApp->GetAppName() */
+ wxPrivateDropTarget();
+ /* see SetId() below for explanation */
+ wxPrivateDropTarget( const wxString &id );
+
+ virtual bool OnMove( int x, int y );
+ virtual bool OnDrop( int x, int y );
+ virtual bool OnData( int x, int y );
- virtual size_t GetFormatCount() const;
- virtual wxDataFormat GetFormat(size_t n) const;
+ /* you have to override OnDropData to get at the data */
+ virtual bool OnDropData( int x, int y, void *data, size_t size ) = 0;
+
+ /* the string ID identifies the format of clipboard or DnD data. a word
+ processor would e.g. add a wxTextDataObject and a wxPrivateDataObject
+ to the clipboard - the latter with the Id "application/wxword" or
+ "image/png". */
+ void SetId( const wxString& id ) { m_id = id; }
+ wxString GetId() { return m_id; }
+
+private:
+
+ wxString m_id;
};
-// ----------------------------------------------------------------------------
+//----------------------------------------------------------------------------
// A drop target which accepts files (dragged from File Manager or Explorer)
-// ----------------------------------------------------------------------------
+//----------------------------------------------------------------------------
class wxFileDropTarget: public wxDropTarget
{
- public:
+public:
- wxFileDropTarget() {};
+ wxFileDropTarget() {}
- virtual bool OnDrop( long x, long y, const void *data, size_t size );
- virtual bool OnDropFiles( long x, long y,
- size_t nFiles, const char * const aszFiles[] );
-
- protected:
+ virtual bool OnMove( int x, int y );
+ virtual bool OnDrop( int x, int y );
+ virtual bool OnData( int x, int y );
- virtual size_t GetFormatCount() const;
- virtual wxDataFormat GetFormat(size_t n) const;
+ /* you have to override OnDropFiles to get at the file names */
+ virtual bool OnDropFiles( int x, int y, size_t nFiles, const wxChar * const aszFiles[] ) = 0;
+
};
//-------------------------------------------------------------------------
wxDragError, // error prevented the d&d operation from completing
wxDragNone, // drag target didn't accept the data
wxDragCopy, // the data was successfully copied
- wxDragMove, // the data was successfully moved
+ wxDragMove, // the data was successfully moved (MSW only)
wxDragCancel // the operation was cancelled by user (not an error)
};
class wxDropSource: public wxObject
{
- public:
+public:
- wxDropSource( wxWindow *win );
- wxDropSource( wxDataObject &data, wxWindow *win );
+ /* constructor. set data later with SetData() */
+ wxDropSource( wxWindow *win, const wxIcon &go = wxNullIcon, const wxIcon &stop = wxNullIcon );
- ~wxDropSource(void);
+ /* constructor for setting one data object */
+ wxDropSource( wxDataObject *data, wxWindow *win, const wxIcon &go = wxNullIcon, const wxIcon &stop = wxNullIcon );
- void SetData( wxDataObject &data );
- wxDragResult DoDragDrop( bool bAllowMove = FALSE );
+ /* constructor for setting several data objects via wxDataBroker */
+ wxDropSource( wxDataBroker *data, wxWindow *win );
+
+ ~wxDropSource();
- virtual bool GiveFeedback( wxDragResult WXUNUSED(effect), bool WXUNUSED(bScrolling) ) { return TRUE; };
+ /* set several dataobjects via wxDataBroker */
+ void SetData( wxDataBroker *data );
+
+ /* set one dataobject */
+ void SetData( wxDataObject *data );
+
+ /* start drag action */
+ wxDragResult DoDragDrop( bool bAllowMove = FALSE );
+
+ /* override to give feedback */
+ virtual bool GiveFeedback( wxDragResult WXUNUSED(effect), bool WXUNUSED(bScrolling) ) { return TRUE; }
- // implementation
+ /* GTK implementation */
- void RegisterWindow(void);
- void UnregisterWindow(void);
+ void RegisterWindow();
+ void UnregisterWindow();
GtkWidget *m_widget;
wxWindow *m_window;
wxDragResult m_retValue;
- wxDataObject *m_data;
+ wxDataBroker *m_data;
wxCursor m_defaultCursor;
wxCursor m_goaheadCursor;
+
+ wxIcon m_goIcon;
+ wxIcon m_stopIcon;
+
+ bool m_waiting;
};
+#endif
+
+ // wxUSE_DRAG_AND_DROP
+
#endif
//__GTKDNDH__
projects / wxWidgets.git / blobdiff