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7b5d569973c2bf329a666c38e1612ca836695576
wxWidgets/src/gtk/dnd.cpp
Robert Roebling 7b5d569973 Added wxDropSource::GiveFeedBack(). 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4145 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1999-10-22 22:43:21 +00:00

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///////////////////////////////////////////////////////////////////////////////
// Name: dnd.cpp
// Purpose: wxDropTarget class
// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#pragma implementation "dnd.h"
#endif
#include "wx/dnd.h"
#if wxUSE_DRAG_AND_DROP
#include "wx/window.h"
#include "wx/app.h"
#include "wx/gdicmn.h"
#include "wx/intl.h"
#include "wx/utils.h"
#include "gdk/gdk.h"
#include "gtk/gtk.h"
#include "gdk/gdkprivate.h"
#include "gtk/gtkdnd.h"
#include "gtk/gtkselection.h"
//-----------------------------------------------------------------------------
// idle system
//-----------------------------------------------------------------------------
extern void wxapp_install_idle_handler();
extern bool g_isIdle;
//-----------------------------------------------------------------------------
// thread system
//-----------------------------------------------------------------------------
#if wxUSE_THREADS
extern void wxapp_install_thread_wakeup();
extern void wxapp_uninstall_thread_wakeup();
#endif
//----------------------------------------------------------------------------
// global data
//----------------------------------------------------------------------------
extern bool g_blockEventsOnDrag;
//----------------------------------------------------------------------------
// standard icons
//----------------------------------------------------------------------------
/* XPM */
static char * page_xpm[] = {
/* width height ncolors chars_per_pixel */
"32 32 5 1",
/* colors */
" s None c None",
". c black",
"X c wheat",
"o c tan",
"O c #6699FF",
/* pixels */
" ................... ",
" .XXXXXXXXXXXXXXXXX.. ",
" .XXXXXXXXXXXXXXXXX.o. ",
" .XXXXXXXXXXXXXXXXX.oo. ",
" .XXXXXXXXXXXXXXXXX.ooo. ",
" .XXXXXXXXXXXXXXXXX.oooo. ",
" .XXXXXXXXXXXXXXXXX....... ",
" .XXXXXOOOOOOOOOOXXXooooo. ",
" .XXXXXXXXXXXXXXXXXXooooo. ",
" .XXXXXOOOOOOOOOOXXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXXXOOOOOOOOOXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXXOOOOOOOOOOXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXOOOOOOOOOOXXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXXXOOOOOOOOOXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXXOOOOOOOOOOXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXOOOOOOOOOOXXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXXOOOOOOOOOOXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXOOOOOOOXXXXXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" .XXXXXXXXXXXXXXXXXXXXXXX. ",
" ......................... "};
// ----------------------------------------------------------------------------
// "drag_leave"
// ----------------------------------------------------------------------------
static void target_drag_leave( GtkWidget *WXUNUSED(widget),
GdkDragContext *context,
guint WXUNUSED(time),
wxDropTarget *drop_target )
{
if (g_isIdle) wxapp_install_idle_handler();
/* inform the wxDropTarget about the current GdkDragContext.
this is only valid for the duration of this call */
drop_target->SetDragContext( context );
/* we don't need return values. this event is just for
information */
drop_target->OnLeave();
/* this has to be done because GDK has no "drag_enter" event */
drop_target->m_firstMotion = TRUE;
/* after this, invalidate the drop_target's GdkDragContext */
drop_target->SetDragContext( (GdkDragContext*) NULL );
}
// ----------------------------------------------------------------------------
// "drag_motion"
// ----------------------------------------------------------------------------
static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget),
GdkDragContext *context,
gint x,
gint y,
guint time,
wxDropTarget *drop_target )
{
if (g_isIdle) wxapp_install_idle_handler();
/* Owen Taylor: "if the coordinates not in a drop zone,
return FALSE, otherwise call gtk_drag_status() and
return TRUE" */
/* inform the wxDropTarget about the current GdkDragContext.
this is only valid for the duration of this call */
drop_target->SetDragContext( context );
wxDragResult result = wxDragMove;
if (context->suggested_action == GDK_ACTION_COPY) result = wxDragCopy;
if (drop_target->m_firstMotion)
{
/* the first "drag_motion" event substitutes a "drag_enter" event */
result = drop_target->OnEnter( x, y, result );
}
else
{
/* give program a chance to react (i.e. to say no by returning FALSE) */
result = drop_target->OnDragOver( x, y, result );
}
bool ret = result != wxDragNone;
if (ret)
{
GdkDragAction action = GDK_ACTION_MOVE;
if (result == wxDragCopy) action = GDK_ACTION_COPY;
gdk_drag_status( context, action, time );
}
/* after this, invalidate the drop_target's GdkDragContext */
drop_target->SetDragContext( (GdkDragContext*) NULL );
/* this has to be done because GDK has no "drag_enter" event */
drop_target->m_firstMotion = FALSE;
return ret;
}
// ----------------------------------------------------------------------------
// "drag_drop"
// ----------------------------------------------------------------------------
static gboolean target_drag_drop( GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time,
wxDropTarget *drop_target )
{
if (g_isIdle) wxapp_install_idle_handler();
/* Owen Taylor: "if the drop is not in a drop zone,
return FALSE, otherwise, if you aren't accepting
the drop, call gtk_drag_finish() with success == FALSE
otherwise call gtk_drag_data_get()" */
// printf( "drop.\n" );
/* this seems to make a difference between not accepting
due to wrong target area and due to wrong format. let
us hope that this is not required.. */
/* inform the wxDropTarget about the current GdkDragContext.
this is only valid for the duration of this call */
drop_target->SetDragContext( context );
/* inform the wxDropTarget about the current drag widget.
this is only valid for the duration of this call */
drop_target->SetDragWidget( widget );
/* inform the wxDropTarget about the current drag time.
this is only valid for the duration of this call */
drop_target->SetDragTime( time );
/*
wxDragResult result = wxDragMove;
if (context->suggested_action == GDK_ACTION_COPY) result = wxDragCopy;
*/
bool ret = drop_target->OnDrop( x, y );
if (!ret)
{
wxLogDebug( wxT( "Drop target: OnDrop returned TRUE") );
/* cancel the whole thing */
gtk_drag_finish( context,
FALSE, /* no success */
FALSE, /* don't delete data on dropping side */
time );
}
else
{
wxLogDebug( wxT( "Drop target: OnDrop returned TRUE") );
#if wxUSE_THREADS
/* disable GUI threads */
wxapp_uninstall_thread_wakeup();
#endif
GdkAtom format = drop_target->GetMatchingPair();
wxASSERT( format );
/*
GdkDragAction action = GDK_ACTION_MOVE;
if (result == wxDragCopy) action == GDK_ACTION_COPY;
context->action = action;
*/
/* this should trigger an "drag_data_received" event */
gtk_drag_get_data( widget,
context,
format,
time );
#if wxUSE_THREADS
/* re-enable GUI threads */
wxapp_install_thread_wakeup();
#endif
}
/* after this, invalidate the drop_target's GdkDragContext */
drop_target->SetDragContext( (GdkDragContext*) NULL );
/* after this, invalidate the drop_target's drag widget */
drop_target->SetDragWidget( (GtkWidget*) NULL );
/* this has to be done because GDK has no "drag_enter" event */
drop_target->m_firstMotion = TRUE;
return ret;
}
// ----------------------------------------------------------------------------
// "drag_data_received"
// ----------------------------------------------------------------------------
static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *data,
guint WXUNUSED(info),
guint time,
wxDropTarget *drop_target )
{
if (g_isIdle) wxapp_install_idle_handler();
/* Owen Taylor: "call gtk_drag_finish() with
success == TRUE" */
if ((data->length <= 0) || (data->format != 8))
{
/* negative data length and non 8-bit data format
qualifies for junk */
gtk_drag_finish (context, FALSE, FALSE, time);
return;
}
wxLogDebug( wxT( "Drop target: data received event") );
/* inform the wxDropTarget about the current GtkSelectionData.
this is only valid for the duration of this call */
drop_target->SetDragData( data );
if (drop_target->OnData( x, y ))
{
wxLogDebug( wxT( "Drop target: OnData returned TRUE") );
/* tell GTK that data transfer was successfull */
gtk_drag_finish( context, TRUE, FALSE, time );
}
else
{
wxLogDebug( wxT( "Drop target: OnData returned FALSE") );
/* tell GTK that data transfer was not successfull */
gtk_drag_finish( context, FALSE, FALSE, time );
}
/* after this, invalidate the drop_target's drag data */
drop_target->SetDragData( (GtkSelectionData*) NULL );
}
//----------------------------------------------------------------------------
// wxDropTarget
//----------------------------------------------------------------------------
wxDropTarget::wxDropTarget( wxDataObject *data )
: wxDropTargetBase( data )
{
m_firstMotion = TRUE;
m_dragContext = (GdkDragContext*) NULL;
m_dragWidget = (GtkWidget*) NULL;
m_dragData = (GtkSelectionData*) NULL;
m_dragTime = 0;
}
wxDragResult wxDropTarget::OnDragOver( wxCoord WXUNUSED(x),
wxCoord WXUNUSED(y),
wxDragResult def )
{
// GetMatchingPair() checks for m_dataObject too, no need to do it here
// disable the debug message from GetMatchingPair() - there are too many
// of them otherwise
#ifdef __WXDEBUG__
wxLogNull noLog;
#endif // Debug
return (GetMatchingPair() != (GdkAtom) 0) ? def : wxDragNone;
}
bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
{
if (!m_dataObject)
return FALSE;
return (GetMatchingPair() != (GdkAtom) 0);
}
bool wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
{
if (!m_dataObject)
return FALSE;
if (GetMatchingPair() == (GdkAtom) 0)
return FALSE;
return GetData();
}
GdkAtom wxDropTarget::GetMatchingPair()
{
if (!m_dataObject)
return (GdkAtom) 0;
if (!m_dragContext)
return (GdkAtom) 0;
GList *child = m_dragContext->targets;
while (child)
{
GdkAtom formatAtom = (GdkAtom) GPOINTER_TO_INT(child->data);
wxDataFormat format( formatAtom );
#ifdef __WXDEBUG__
char *name = gdk_atom_name( formatAtom );
wxLogDebug("Drop target: drag has format: %s", name ? name : "unnamed");
#endif // Debug
if (m_dataObject->IsSupportedFormat( format ))
return formatAtom;
child = child->next;
}
return (GdkAtom) 0;
}
bool wxDropTarget::GetData()
{
if (!m_dragData)
return FALSE;
if (!m_dataObject)
return FALSE;
wxDataFormat dragFormat( m_dragData->target );
if (!m_dataObject->IsSupportedFormat( dragFormat ))
return FALSE;
if (dragFormat.GetType() == wxDF_TEXT)
{
wxTextDataObject *text_object = (wxTextDataObject*)m_dataObject;
text_object->SetText( (const char*)m_dragData->data );
return TRUE;
}
if (dragFormat.GetType() == wxDF_FILENAME)
{
wxFileDataObject *file_object = (wxFileDataObject*)m_dataObject;
file_object->SetData( 0, (const char*)m_dragData->data );
return TRUE;
}
m_dataObject->SetData( dragFormat, (size_t)m_dragData->length, (const void*)m_dragData->data );
return TRUE;
}
void wxDropTarget::UnregisterWidget( GtkWidget *widget )
{
wxCHECK_RET( widget != NULL, wxT("unregister widget is NULL") );
gtk_drag_dest_unset( widget );
gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this );
gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this );
gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this );
gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this );
}
void wxDropTarget::RegisterWidget( GtkWidget *widget )
{
wxCHECK_RET( widget != NULL, wxT("register widget is NULL") );
/* gtk_drag_dest_set() determines what default behaviour we'd like
GTK to supply. we don't want to specify out targets (=formats)
or actions in advance (i.e. not GTK_DEST_DEFAULT_MOTION and
not GTK_DEST_DEFAULT_DROP). instead we react individually to
"drag_motion" and "drag_drop" events. this makes it possible
to allow dropping on only a small area. we should set
GTK_DEST_DEFAULT_HIGHLIGHT as this will switch on the nice
highlighting if dragging over standard controls, but this
seems to be broken without the other two. */
gtk_drag_dest_set( widget,
(GtkDestDefaults) 0, /* no default behaviour */
(GtkTargetEntry*) NULL, /* we don't supply any formats here */
0, /* number of targets = 0 */
(GdkDragAction) 0 ); /* we don't supply any actions here */
gtk_signal_connect( GTK_OBJECT(widget), "drag_leave",
GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this );
gtk_signal_connect( GTK_OBJECT(widget), "drag_motion",
GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this );
gtk_signal_connect( GTK_OBJECT(widget), "drag_drop",
GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this );
gtk_signal_connect( GTK_OBJECT(widget), "drag_data_received",
GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this );
}
// ----------------------------------------------------------------------------
// wxTextDropTarget
// ----------------------------------------------------------------------------
wxTextDropTarget::wxTextDropTarget()
: wxDropTarget(new wxTextDataObject)
{
}
bool wxTextDropTarget::OnData(wxCoord x, wxCoord y)
{
if ( !GetData() )
return FALSE;
return OnDropText(x, y, ((wxTextDataObject *)m_dataObject)->GetText());
}
// ----------------------------------------------------------------------------
// wxFileDropTarget
// ----------------------------------------------------------------------------
wxFileDropTarget::wxFileDropTarget()
: wxDropTarget(new wxFileDataObject)
{
}
bool wxFileDropTarget::OnData(wxCoord x, wxCoord y)
{
if ( !GetData() )
return FALSE;
return OnDropFiles(x, y,
((wxFileDataObject *)m_dataObject)->GetFilenames());
}
//----------------------------------------------------------------------------
// "drag_data_get"
//----------------------------------------------------------------------------
static void
source_drag_data_get (GtkWidget *WXUNUSED(widget),
GdkDragContext *context,
GtkSelectionData *selection_data,
guint WXUNUSED(info),
guint WXUNUSED(time),
wxDropSource *drop_source )
{
if (g_isIdle) wxapp_install_idle_handler();
wxDataFormat format( selection_data->target );
wxLogDebug( wxT("Drop source: format requested: %s"), format.GetId().c_str() );
drop_source->m_retValue = wxDragCancel;
wxDataObject *data = drop_source->GetDataObject();
if (!data)
{
wxLogDebug( wxT("Drop source: no data object") );
return;
}
if (!data->IsSupportedFormat(format))
{
wxLogDebug( wxT("Drop source: unsupported format") );
return;
}
if (data->GetDataSize(format) == 0)
{
wxLogDebug( wxT("Drop source: empty data") );
return;
}
size_t size = data->GetDataSize(format);
// printf( "data size: %d.\n", (int)data_size );
guchar *d = new guchar[size];
if (!data->GetDataHere( format, (void*)d ))
{
delete[] d;
return;
}
#if wxUSE_THREADS
/* disable GUI threads */
wxapp_uninstall_thread_wakeup();
#endif
gtk_selection_data_set( selection_data,
selection_data->target,
8, // 8-bit
d,
size );
#if wxUSE_THREADS
/* enable GUI threads */
wxapp_install_thread_wakeup();
#endif
delete[] d;
/* so far only copy, no moves. TODO. */
drop_source->m_retValue = wxDragCopy;
}
//----------------------------------------------------------------------------
// "drag_data_delete"
//----------------------------------------------------------------------------
static void source_drag_data_delete( GtkWidget *WXUNUSED(widget),
GdkDragContext *WXUNUSED(context),
wxDropSource *drop_source )
{
if (g_isIdle) wxapp_install_idle_handler();
// printf( "Delete the data!\n" );
drop_source->m_retValue = wxDragMove;
}
//----------------------------------------------------------------------------
// "drag_begin"
//----------------------------------------------------------------------------
static void source_drag_begin( GtkWidget *WXUNUSED(widget),
GdkDragContext *WXUNUSED(context),
wxDropSource *WXUNUSED(drop_source) )
{
if (g_isIdle) wxapp_install_idle_handler();
// printf( "drag_begin.\n" );
}
//----------------------------------------------------------------------------
// "drag_end"
//----------------------------------------------------------------------------
static void source_drag_end( GtkWidget *WXUNUSED(widget),
GdkDragContext *WXUNUSED(context),
wxDropSource *drop_source )
{
if (g_isIdle) wxapp_install_idle_handler();
// printf( "drag_end.\n" );
drop_source->m_waiting = FALSE;
}
//-----------------------------------------------------------------------------
// "configure_event" from m_iconWindow
//-----------------------------------------------------------------------------
static gint
gtk_dnd_window_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDropSource *source )
{
if (g_isIdle)
wxapp_install_idle_handler();
wxDragResult action = wxDragNone;
if (source->m_dragContext->action == GDK_ACTION_COPY) action = wxDragCopy;
if (source->m_dragContext->action == GDK_ACTION_MOVE) action = wxDragMove;
source->GiveFeedback( action, FALSE );
return 0;
}
//---------------------------------------------------------------------------
// wxDropSource
//---------------------------------------------------------------------------
wxDropSource::wxDropSource( wxWindow *win, const wxIcon &icon )
{
g_blockEventsOnDrag = TRUE;
m_waiting = TRUE;
m_iconWindow = (GtkWidget*) NULL;
m_window = win;
m_widget = win->m_widget;
if (win->m_wxwindow) m_widget = win->m_wxwindow;
m_retValue = wxDragCancel;
m_icon = icon;
if (wxNullIcon == icon) m_icon = wxIcon( page_xpm );
}
wxDropSource::wxDropSource( wxDataObject& data, wxWindow *win, const wxIcon &icon )
{
m_waiting = TRUE;
SetData( data );
m_iconWindow = (GtkWidget*) NULL;
m_window = win;
m_widget = win->m_widget;
if (win->m_wxwindow) m_widget = win->m_wxwindow;
m_retValue = wxDragCancel;
m_icon = icon;
if (wxNullIcon == icon) m_icon = wxIcon( page_xpm );
}
wxDropSource::~wxDropSource()
{
g_blockEventsOnDrag = FALSE;
}
void wxDropSource::PrepareIcon( int hot_x, int hot_y, GdkDragContext *context )
{
GdkBitmap *mask = (GdkBitmap *) NULL;
if (m_icon.GetMask()) mask = m_icon.GetMask()->GetBitmap();
GdkPixmap *pixmap = m_icon.GetPixmap();
gint width,height;
gdk_window_get_size (pixmap, &width, &height);
GdkColormap *colormap = gtk_widget_get_colormap( m_widget );
gtk_widget_push_visual (gdk_colormap_get_visual (colormap));
gtk_widget_push_colormap (colormap);
m_iconWindow = gtk_window_new (GTK_WINDOW_POPUP);
gtk_widget_set_events (m_iconWindow, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
gtk_widget_set_app_paintable (GTK_WIDGET (m_iconWindow), TRUE);
gtk_widget_pop_visual ();
gtk_widget_pop_colormap ();
gtk_widget_set_usize (m_iconWindow, width, height);
gtk_widget_realize (m_iconWindow);
gtk_signal_connect( GTK_OBJECT(m_iconWindow), "configure_event",
GTK_SIGNAL_FUNC(gtk_dnd_window_configure_callback), (gpointer)this );
gdk_window_set_back_pixmap (m_iconWindow->window, pixmap, FALSE);
if (mask)
gtk_widget_shape_combine_mask (m_iconWindow, mask, 0, 0);
gtk_drag_set_icon_widget( context, m_iconWindow, hot_x, hot_y );
}
wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) )
{
wxASSERT_MSG( m_data, wxT("wxDragSource: no data") );
if (!m_data)
return (wxDragResult) wxDragNone;
if (m_data->GetFormatCount() == 0)
return (wxDragResult) wxDragNone;
g_blockEventsOnDrag = TRUE;
RegisterWindow();
m_waiting = TRUE;
GtkTargetList *target_list = gtk_target_list_new( (GtkTargetEntry*) NULL, 0 );
wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
m_data->GetAllFormats( array );
for (size_t i = 0; i < m_data->GetFormatCount(); i++)
{
GdkAtom atom = array[i];
wxLogDebug( wxT("Supported atom %s"), gdk_atom_name( atom ) );
gtk_target_list_add( target_list, atom, 0, 0 );
}
delete[] array;
GdkEventMotion event;
event.window = m_widget->window;
int x = 0;
int y = 0;
GdkModifierType state;
gdk_window_get_pointer( event.window, &x, &y, &state );
event.x = x;
event.y = y;
event.state = state;
event.time = GDK_CURRENT_TIME;
/* GTK wants to know which button was pressed which caused the dragging */
int button_number = 0;
if (event.state & GDK_BUTTON1_MASK) button_number = 1;
else if (event.state & GDK_BUTTON2_MASK) button_number = 2;
else if (event.state & GDK_BUTTON3_MASK) button_number = 3;
#if wxUSE_THREADS
/* disable GUI threads */
wxapp_uninstall_thread_wakeup();
#endif
/* don't start dragging if no button is down */
if (button_number)
{
GdkDragContext *context = gtk_drag_begin( m_widget,
target_list,
(GdkDragAction)(GDK_ACTION_COPY|GDK_ACTION_MOVE),
button_number, /* number of mouse button which started drag */
(GdkEvent*) &event );
m_dragContext = context;
PrepareIcon( 0, 0, context );
while (m_waiting) gtk_main_iteration();;
}
#if wxUSE_THREADS
/* re-enable GUI threads */
wxapp_install_thread_wakeup();
#endif
g_blockEventsOnDrag = FALSE;
UnregisterWindow();
return m_retValue;
}
void wxDropSource::RegisterWindow()
{
if (!m_widget) return;
gtk_signal_connect( GTK_OBJECT(m_widget), "drag_data_get",
GTK_SIGNAL_FUNC (source_drag_data_get), (gpointer) this);
gtk_signal_connect (GTK_OBJECT(m_widget), "drag_data_delete",
GTK_SIGNAL_FUNC (source_drag_data_delete), (gpointer) this );
gtk_signal_connect (GTK_OBJECT(m_widget), "drag_begin",
GTK_SIGNAL_FUNC (source_drag_begin), (gpointer) this );
gtk_signal_connect (GTK_OBJECT(m_widget), "drag_end",
GTK_SIGNAL_FUNC (source_drag_end), (gpointer) this );
}
void wxDropSource::UnregisterWindow()
{
if (!m_widget) return;
gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
GTK_SIGNAL_FUNC(source_drag_data_get), (gpointer) this );
gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
GTK_SIGNAL_FUNC(source_drag_data_delete), (gpointer) this );
gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
GTK_SIGNAL_FUNC(source_drag_begin), (gpointer) this );
gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
GTK_SIGNAL_FUNC(source_drag_end), (gpointer) this );
}
#endif
// wxUSE_DRAG_AND_DROP
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