wxWidgets/include/wx/gtk/dnd.h
Robert Roebling dc86cb34c3 DnD fixes
Image fixes
  Clipboard API


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@952 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1998-11-02 14:12:29 +00:00

222 lines
6.0 KiB
C++

///////////////////////////////////////////////////////////////////////////////
// Name: dnd.h
// Purpose: declaration of the wxDropTarget class
// Author: Robert Roebling
// RCS-ID: $Id$
// Copyright: (c) 1998 Vadim Zeitlin, Robert Roebling
// Licence: wxWindows license
///////////////////////////////////////////////////////////////////////////////
#ifndef __GTKDNDH__
#define __GTKDNDH__
#ifdef __GNUG__
#pragma interface
#endif
#include "wx/defs.h"
#include "wx/object.h"
#include "wx/string.h"
#include "wx/cursor.h"
//-------------------------------------------------------------------------
// classes
//-------------------------------------------------------------------------
class wxWindow;
class wxDataObject;
class wxTextDataObject;
class wxFileDataObject;
class wxDropTarget;
class wxTextDropTarget;
class wxFileDropTarget;
class wxDropSource;
//-------------------------------------------------------------------------
// wxDataObject
//-------------------------------------------------------------------------
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
{
public:
wxTextDataObject() { }
wxTextDataObject(const wxString& strText) : m_strText(strText) { }
void Init(const wxString& strText) { m_strText = strText; }
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'
virtual void GetDataHere( void *data ) const
{ memcpy(data, 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 += '\0'; }
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(); } // no trailing '\0'
virtual void GetDataHere( void *data ) const
{ memcpy(data, m_files.c_str(), GetDataSize()); }
private:
wxString m_files;
};
//-------------------------------------------------------------------------
// wxDropTarget
//-------------------------------------------------------------------------
class wxDropTarget: public wxObject
{
public:
wxDropTarget();
~wxDropTarget();
virtual void OnEnter() { }
virtual void OnLeave() { }
virtual bool OnDrop( long x, long y, const void *data, size_t size ) = 0;
// 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 );
};
//-------------------------------------------------------------------------
// wxTextDropTarget
//-------------------------------------------------------------------------
class wxTextDropTarget: public wxDropTarget
{
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:
virtual size_t GetFormatCount() const;
virtual wxDataFormat GetFormat(size_t n) const;
};
// ----------------------------------------------------------------------------
// A drop target which accepts files (dragged from File Manager or Explorer)
// ----------------------------------------------------------------------------
class wxFileDropTarget: public wxDropTarget
{
public:
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 size_t GetFormatCount() const;
virtual wxDataFormat GetFormat(size_t n) const;
};
//-------------------------------------------------------------------------
// wxDropSource
//-------------------------------------------------------------------------
enum wxDragResult
{
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
wxDragCancel // the operation was cancelled by user (not an error)
};
class wxDropSource: public wxObject
{
public:
wxDropSource( wxWindow *win );
wxDropSource( wxDataObject &data, wxWindow *win );
~wxDropSource(void);
void SetData( wxDataObject &data );
wxDragResult DoDragDrop( bool bAllowMove = FALSE );
virtual bool GiveFeedback( wxDragResult WXUNUSED(effect), bool WXUNUSED(bScrolling) ) { return TRUE; };
// implementation
void RegisterWindow(void);
void UnregisterWindow(void);
GtkWidget *m_widget;
wxWindow *m_window;
wxDragResult m_retValue;
wxDataObject *m_data;
wxCursor m_defaultCursor;
wxCursor m_goaheadCursor;
};
#endif
//__GTKDNDH__