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dolphin/Externals/wxWidgets3/src/gtk/dnd.cpp

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///////////////////////////////////////////////////////////////////////////////
// Name: src/gtk/dnd.cpp
// Purpose: wxDropTarget class
// Author: Robert Roebling
// Copyright: (c) 1998 Robert Roebling
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#if wxUSE_DRAG_AND_DROP
#include "wx/dnd.h"
#ifndef WX_PRECOMP
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/app.h"
#include "wx/utils.h"
#include "wx/window.h"
#include "wx/gdicmn.h"
#endif
#include "wx/scopeguard.h"
#include <gtk/gtk.h>
#include "wx/gtk/private/gtk2-compat.h"
//----------------------------------------------------------------------------
// global data
//----------------------------------------------------------------------------
extern bool g_blockEventsOnDrag;
// the flags used for the last DoDragDrop()
static long gs_flagsForDrag = 0;
// the trace mask we use with wxLogTrace() - call
// wxLog::AddTraceMask(TRACE_DND) to enable the trace messages from here
// (there are quite a few of them, so don't enable this by default)
#define TRACE_DND "dnd"
// global variables because GTK+ DnD want to have the
// mouse event that caused it
extern GdkEvent *g_lastMouseEvent;
extern int g_lastButtonNumber;
//----------------------------------------------------------------------------
// standard icons
//----------------------------------------------------------------------------
/* Copyright (c) Julian Smart */
static const char * page_xpm[] = {
/* columns rows colors chars-per-pixel */
"32 32 37 1",
"5 c #7198D9",
", c #769CDA",
"2 c #DCE6F6",
"i c #FFFFFF",
"e c #779DDB",
": c #9AB6E4",
"9 c #EAF0FA",
"- c #B1C7EB",
"$ c #6992D7",
"y c #F7F9FD",
"= c #BED0EE",
"q c #F0F5FC",
"; c #A8C0E8",
"@ c #366BC2",
" c None",
"u c #FDFEFF",
"8 c #5987D3",
"* c #C4D5F0",
"7 c #7CA0DC",
"O c #487BCE",
"< c #6B94D7",
"& c #CCDAF2",
"> c #89A9DF",
"3 c #5584D1",
"w c #82A5DE",
"1 c #3F74CB",
"+ c #3A70CA",
". c #3569BF",
"% c #D2DFF4",
"# c #3366BB",
"r c #F5F8FD",
"0 c #FAFCFE",
"4 c #DFE8F7",
"X c #5E8AD4",
"o c #5282D0",
"t c #B8CCEC",
"6 c #E5EDF9",
/* pixels */
" ",
" ",
" ",
" ",
" ",
" .XXXooOO++@# ",
" $%&*=-;::>,<1 ",
" $2%&*=-;::><:3 ",
" $42%&*=-;::<&:3 ",
" 56477<<<<8<<9&:X ",
" 59642%&*=-;<09&:5 ",
" 5q9642%&*=-<<<<<# ",
" 5qqw777<<<<<88:>+ ",
" erqq9642%&*=t;::+ ",
" eyrqq9642%&*=t;:O ",
" eyywwww777<<<<t;O ",
" e0yyrqq9642%&*=to ",
" e00yyrqq9642%&*=o ",
" eu0wwwwwww777<&*X ",
" euu00yyrqq9642%&X ",
" eiuu00yyrqq9642%X ",
" eiiwwwwwwwwww742$ ",
" eiiiuu00yyrqq964$ ",
" eiiiiuu00yyrqq96$ ",
" eiiiiiuu00yyrqq95 ",
" eiiiiiiuu00yyrqq5 ",
" eeeeeeeeeeeeee55e ",
" ",
" ",
" ",
" ",
" "
};
// ============================================================================
// private functions
// ============================================================================
// ----------------------------------------------------------------------------
// convert between GTK+ and wxWidgets DND constants
// ----------------------------------------------------------------------------
static wxDragResult ConvertFromGTK(long action)
{
switch ( action )
{
case GDK_ACTION_COPY:
return wxDragCopy;
case GDK_ACTION_LINK:
return wxDragLink;
case GDK_ACTION_MOVE:
return wxDragMove;
}
return wxDragNone;
}
// ----------------------------------------------------------------------------
// "drag_leave"
// ----------------------------------------------------------------------------
extern "C" {
static void target_drag_leave( GtkWidget *WXUNUSED(widget),
GdkDragContext *context,
guint WXUNUSED(time),
wxDropTarget *drop_target )
{
/* inform the wxDropTarget about the current GdkDragContext.
this is only valid for the duration of this call */
drop_target->GTKSetDragContext( 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->GTKSetDragContext( NULL );
}
}
// ----------------------------------------------------------------------------
// "drag_motion"
// ----------------------------------------------------------------------------
extern "C" {
static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget),
GdkDragContext *context,
gint x,
gint y,
guint time,
wxDropTarget *drop_target )
{
/* Owen Taylor: "if the coordinates not in a drop zone,
return FALSE, otherwise call gtk_drag_status() and
return TRUE" */
#if 0
wxPrintf( "motion\n" );
GList *tmp_list;
for (tmp_list = context->targets; tmp_list; tmp_list = tmp_list->next)
{
wxString atom = wxString::FromAscii( gdk_atom_name (GDK_POINTER_TO_ATOM (tmp_list->data)) );
wxPrintf( "Atom: %s\n", atom );
}
#endif
// Inform the wxDropTarget about the current GdkDragContext.
// This is only valid for the duration of this call.
drop_target->GTKSetDragContext( context );
// Does the source actually accept the data type?
if (drop_target->GTKGetMatchingPair() == (GdkAtom) 0)
{
drop_target->GTKSetDragContext( NULL );
return FALSE;
}
wxDragResult suggested_action = drop_target->GTKFigureOutSuggestedAction();
wxDragResult result = wxDragNone;
if (drop_target->m_firstMotion)
{
// the first "drag_motion" event substitutes a "drag_enter" event
result = drop_target->OnEnter( x, y, suggested_action );
}
else
{
// give program a chance to react (i.e. to say no by returning FALSE)
result = drop_target->OnDragOver( x, y, suggested_action );
}
GdkDragAction result_action = GDK_ACTION_DEFAULT;
if (result == wxDragCopy)
result_action = GDK_ACTION_COPY;
else if (result == wxDragLink)
result_action = GDK_ACTION_LINK;
else
result_action = GDK_ACTION_MOVE;
// is result action actually supported
bool ret = (result_action != GDK_ACTION_DEFAULT) &&
(gdk_drag_context_get_actions(context) & result_action);
if (ret)
gdk_drag_status( context, result_action, time );
// after this, invalidate the drop_target's GdkDragContext
drop_target->GTKSetDragContext( NULL );
// this has to be done because GDK has no "drag_enter" event
drop_target->m_firstMotion = false;
return ret;
}
}
// ----------------------------------------------------------------------------
// "drag_drop"
// ----------------------------------------------------------------------------
extern "C" {
static gboolean target_drag_drop( GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time,
wxDropTarget *drop_target )
{
/* 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()" */
/* inform the wxDropTarget about the current GdkDragContext.
this is only valid for the duration of this call */
drop_target->GTKSetDragContext( context );
// Does the source actually accept the data type?
if (drop_target->GTKGetMatchingPair() == (GdkAtom) 0)
{
// cancel the whole thing
gtk_drag_finish( context,
FALSE, // no success
FALSE, // don't delete data on dropping side
time );
drop_target->GTKSetDragContext( NULL );
drop_target->m_firstMotion = true;
return FALSE;
}
/* inform the wxDropTarget about the current drag widget.
this is only valid for the duration of this call */
drop_target->GTKSetDragWidget( widget );
/* inform the wxDropTarget about the current drag time.
this is only valid for the duration of this call */
drop_target->GTKSetDragTime( time );
/* reset the block here as someone might very well
show a dialog as a reaction to a drop and this
wouldn't work without events */
g_blockEventsOnDrag = false;
bool ret = drop_target->OnDrop( x, y );
if (!ret)
{
wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned FALSE") );
/* cancel the whole thing */
gtk_drag_finish( context,
FALSE, /* no success */
FALSE, /* don't delete data on dropping side */
time );
}
else
{
wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned true") );
GdkAtom format = drop_target->GTKGetMatchingPair();
// this does happen somehow, see bug 555111
wxCHECK_MSG( format, FALSE, wxT("no matching GdkAtom for format?") );
/* this should trigger an "drag_data_received" event */
gtk_drag_get_data( widget,
context,
format,
time );
}
/* after this, invalidate the drop_target's GdkDragContext */
drop_target->GTKSetDragContext( NULL );
/* after this, invalidate the drop_target's drag widget */
drop_target->GTKSetDragWidget( NULL );
/* this has to be done because GDK has no "drag_enter" event */
drop_target->m_firstMotion = true;
return ret;
}
}
// ----------------------------------------------------------------------------
// "drag_data_received"
// ----------------------------------------------------------------------------
extern "C" {
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 )
{
/* Owen Taylor: "call gtk_drag_finish() with
success == TRUE" */
if (gtk_selection_data_get_length(data) <= 0 || gtk_selection_data_get_format(data) != 8)
{
/* negative data length and non 8-bit data format
qualifies for junk */
gtk_drag_finish (context, FALSE, FALSE, time);
return;
}
wxLogTrace(TRACE_DND, 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->GTKSetDragData( data );
wxDragResult result = ConvertFromGTK(gdk_drag_context_get_selected_action(context));
if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) )
{
wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned true") );
/* tell GTK that data transfer was successful */
gtk_drag_finish( context, TRUE, FALSE, time );
}
else
{
wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned FALSE") );
/* tell GTK that data transfer was not successful */
gtk_drag_finish( context, FALSE, FALSE, time );
}
/* after this, invalidate the drop_target's drag data */
drop_target->GTKSetDragData( NULL );
}
}
//----------------------------------------------------------------------------
// wxDropTarget
//----------------------------------------------------------------------------
wxDropTarget::wxDropTarget( wxDataObject *data )
: wxDropTargetBase( data )
{
m_firstMotion = true;
m_dragContext = NULL;
m_dragWidget = NULL;
m_dragData = NULL;
m_dragTime = 0;
}
wxDragResult wxDropTarget::OnDragOver( wxCoord WXUNUSED(x),
wxCoord WXUNUSED(y),
wxDragResult def )
{
return def;
}
bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
{
return true;
}
wxDragResult wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
wxDragResult def )
{
return GetData() ? def : wxDragNone;
}
wxDragResult wxDropTarget::GTKFigureOutSuggestedAction()
{
if (!m_dragContext)
return wxDragError;
// GTK+ always supposes that we want to copy the data by default while we
// might want to move it, so examine not only suggested_action - which is
// only good if we don't have our own preferences - but also the actions
// field
wxDragResult suggested_action = wxDragNone;
const GdkDragAction actions = gdk_drag_context_get_actions(m_dragContext);
if (GetDefaultAction() == wxDragNone)
{
// use default action set by wxDropSource::DoDragDrop()
if ( (gs_flagsForDrag & wxDrag_DefaultMove) == wxDrag_DefaultMove &&
(actions & GDK_ACTION_MOVE))
{
// move is requested by the program and allowed by GTK+ - do it, even
// though suggested_action may be currently wxDragCopy
suggested_action = wxDragMove;
}
else // use whatever GTK+ says we should
{
suggested_action = ConvertFromGTK(gdk_drag_context_get_suggested_action(m_dragContext));
#if 0
// RR: I don't understand the code below: if the drag comes from
// a different app, the gs_flagsForDrag is invalid; if it
// comes from the same wx app, then GTK+ hopefully won't
// suggest something we didn't allow in the frist place
// in DoDrop()
if ( (suggested_action == wxDragMove) && !(gs_flagsForDrag & wxDrag_AllowMove) )
{
// we're requested to move but we can't
suggested_action = wxDragCopy;
}
#endif
}
}
else if (GetDefaultAction() == wxDragMove &&
(actions & GDK_ACTION_MOVE))
{
suggested_action = wxDragMove;
}
else
{
if (actions & GDK_ACTION_COPY)
suggested_action = wxDragCopy;
else if (actions & GDK_ACTION_MOVE)
suggested_action = wxDragMove;
else if (actions & GDK_ACTION_LINK)
suggested_action = wxDragLink;
else
suggested_action = wxDragNone;
}
return suggested_action;
}
wxDataFormat wxDropTarget::GetMatchingPair()
{
return wxDataFormat( GTKGetMatchingPair() );
}
GdkAtom wxDropTarget::GTKGetMatchingPair(bool quiet)
{
if (!m_dataObject)
return (GdkAtom) 0;
if (!m_dragContext)
return (GdkAtom) 0;
const GList* child = gdk_drag_context_list_targets(m_dragContext);
while (child)
{
GdkAtom formatAtom = (GdkAtom)(child->data);
wxDataFormat format( formatAtom );
if ( !quiet )
{
wxLogTrace(TRACE_DND, wxT("Drop target: drag has format: %s"),
format.GetId().c_str());
}
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(gtk_selection_data_get_target(m_dragData));
if (!m_dataObject->IsSupportedFormat( dragFormat ))
return false;
m_dataObject->SetData(dragFormat,
(size_t)gtk_selection_data_get_length(m_dragData),
(const void*)gtk_selection_data_get_data(m_dragData));
return true;
}
void wxDropTarget::GtkUnregisterWidget( GtkWidget *widget )
{
wxCHECK_RET( widget != NULL, wxT("unregister widget is NULL") );
gtk_drag_dest_unset( widget );
g_signal_handlers_disconnect_by_func (widget,
(gpointer) target_drag_leave, this);
g_signal_handlers_disconnect_by_func (widget,
(gpointer) target_drag_motion, this);
g_signal_handlers_disconnect_by_func (widget,
(gpointer) target_drag_drop, this);
g_signal_handlers_disconnect_by_func (widget,
(gpointer) target_drag_data_received, this);
}
void wxDropTarget::GtkRegisterWidget( 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 */
NULL, /* we don't supply any formats here */
0, /* number of targets = 0 */
(GdkDragAction) 0 ); /* we don't supply any actions here */
g_signal_connect (widget, "drag_leave",
G_CALLBACK (target_drag_leave), this);
g_signal_connect (widget, "drag_motion",
G_CALLBACK (target_drag_motion), this);
g_signal_connect (widget, "drag_drop",
G_CALLBACK (target_drag_drop), this);
g_signal_connect (widget, "drag_data_received",
G_CALLBACK (target_drag_data_received), this);
}
//----------------------------------------------------------------------------
// "drag_data_get"
//----------------------------------------------------------------------------
extern "C" {
static void
source_drag_data_get (GtkWidget *WXUNUSED(widget),
GdkDragContext *context,
GtkSelectionData *selection_data,
guint WXUNUSED(info),
guint WXUNUSED(time),
wxDropSource *drop_source )
{
wxDataFormat format(gtk_selection_data_get_target(selection_data));
wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"),
format.GetId().c_str());
drop_source->m_retValue = wxDragError;
wxDataObject *data = drop_source->GetDataObject();
if (!data)
{
wxLogTrace(TRACE_DND, wxT("Drop source: no data object") );
return;
}
if (!data->IsSupportedFormat(format))
{
wxLogTrace(TRACE_DND, wxT("Drop source: unsupported format") );
return;
}
if (data->GetDataSize(format) == 0)
{
wxLogTrace(TRACE_DND, 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;
}
drop_source->m_retValue = ConvertFromGTK(gdk_drag_context_get_selected_action(context));
gtk_selection_data_set( selection_data,
gtk_selection_data_get_target(selection_data),
8, // 8-bit
d,
size );
delete[] d;
}
}
//----------------------------------------------------------------------------
// "drag_end"
//----------------------------------------------------------------------------
extern "C" {
static void source_drag_end( GtkWidget *WXUNUSED(widget),
GdkDragContext *WXUNUSED(context),
wxDropSource *drop_source )
{
drop_source->m_waiting = false;
}
}
//-----------------------------------------------------------------------------
// "configure_event" from m_iconWindow
//-----------------------------------------------------------------------------
extern "C" {
static gint
gtk_dnd_window_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDropSource *source )
{
source->GiveFeedback(ConvertFromGTK(gdk_drag_context_get_selected_action(source->m_dragContext)));
return 0;
}
}
//---------------------------------------------------------------------------
// wxDropSource
//---------------------------------------------------------------------------
wxDropSource::wxDropSource(wxWindow *win,
const wxIcon &iconCopy,
const wxIcon &iconMove,
const wxIcon &iconNone)
{
m_waiting = true;
m_iconWindow = NULL;
m_window = win;
m_widget = win->m_widget;
if (win->m_wxwindow) m_widget = win->m_wxwindow;
m_retValue = wxDragNone;
SetIcons(iconCopy, iconMove, iconNone);
}
wxDropSource::wxDropSource(wxDataObject& data,
wxWindow *win,
const wxIcon &iconCopy,
const wxIcon &iconMove,
const wxIcon &iconNone)
{
m_waiting = true;
SetData( data );
m_iconWindow = NULL;
m_window = win;
m_widget = win->m_widget;
if (win->m_wxwindow) m_widget = win->m_wxwindow;
m_retValue = wxDragNone;
SetIcons(iconCopy, iconMove, iconNone);
}
void wxDropSource::SetIcons(const wxIcon &iconCopy,
const wxIcon &iconMove,
const wxIcon &iconNone)
{
m_iconCopy = iconCopy;
m_iconMove = iconMove;
m_iconNone = iconNone;
if ( !m_iconCopy.IsOk() )
m_iconCopy = wxIcon(page_xpm);
if ( !m_iconMove.IsOk() )
m_iconMove = m_iconCopy;
if ( !m_iconNone.IsOk() )
m_iconNone = m_iconCopy;
}
wxDropSource::~wxDropSource()
{
}
void wxDropSource::PrepareIcon( int action, GdkDragContext *context )
{
// get the right icon to display
wxIcon *icon = NULL;
if ( action & GDK_ACTION_MOVE )
icon = &m_iconMove;
else if ( action & GDK_ACTION_COPY )
icon = &m_iconCopy;
else
icon = &m_iconNone;
#ifndef __WXGTK3__
GdkBitmap *mask;
if ( icon->GetMask() )
mask = *icon->GetMask();
else
mask = NULL;
GdkPixmap *pixmap = icon->GetPixmap();
GdkColormap *colormap = gtk_widget_get_colormap( m_widget );
gtk_widget_push_colormap (colormap);
#endif
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 (m_iconWindow, TRUE);
#ifdef __WXGTK3__
gtk_widget_set_visual(m_iconWindow, gtk_widget_get_visual(m_widget));
#else
gtk_widget_pop_colormap ();
#endif
gtk_widget_set_size_request (m_iconWindow, icon->GetWidth(), icon->GetHeight());
gtk_widget_realize (m_iconWindow);
g_signal_connect (m_iconWindow, "configure_event",
G_CALLBACK (gtk_dnd_window_configure_callback), this);
#ifdef __WXGTK3__
cairo_t* cr = gdk_cairo_create(gtk_widget_get_window(m_iconWindow));
icon->SetSourceSurface(cr, 0, 0);
cairo_pattern_t* pattern = cairo_get_source(cr);
gdk_window_set_background_pattern(gtk_widget_get_window(m_iconWindow), pattern);
cairo_destroy(cr);
cairo_surface_t* mask = NULL;
if (icon->GetMask())
mask = *icon->GetMask();
if (mask)
{
cairo_region_t* region = gdk_cairo_region_create_from_surface(mask);
gtk_widget_shape_combine_region(m_iconWindow, region);
cairo_region_destroy(region);
}
#else
gdk_window_set_back_pixmap(gtk_widget_get_window(m_iconWindow), pixmap, false);
if (mask)
gtk_widget_shape_combine_mask (m_iconWindow, mask, 0, 0);
#endif
gtk_drag_set_icon_widget( context, m_iconWindow, 0, 0 );
}
wxDragResult wxDropSource::DoDragDrop(int flags)
{
wxCHECK_MSG( m_data && m_data->GetFormatCount(), wxDragNone,
wxT("Drop source: no data") );
// still in drag
if (g_blockEventsOnDrag)
return wxDragNone;
// don't start dragging if no button is down
if (g_lastButtonNumber == 0)
return wxDragNone;
// we can only start a drag after a mouse event
if (g_lastMouseEvent == NULL)
return wxDragNone;
GTKConnectDragSignals();
wxON_BLOCK_EXIT_OBJ0(*this, wxDropSource::GTKDisconnectDragSignals);
m_waiting = true;
GtkTargetList *target_list = gtk_target_list_new( NULL, 0 );
wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
m_data->GetAllFormats( array );
size_t count = m_data->GetFormatCount();
for (size_t i = 0; i < count; i++)
{
GdkAtom atom = array[i];
wxLogTrace(TRACE_DND, wxT("Drop source: Supported atom %s"),
gdk_atom_name( atom ));
gtk_target_list_add( target_list, atom, 0, 0 );
}
delete[] array;
int allowed_actions = GDK_ACTION_COPY;
if ( flags & wxDrag_AllowMove )
allowed_actions |= GDK_ACTION_MOVE;
// VZ: as we already use g_blockEventsOnDrag it shouldn't be that bad
// to use a global to pass the flags to the drop target but I'd
// surely prefer a better way to do it
gs_flagsForDrag = flags;
m_retValue = wxDragCancel;
GdkDragContext *context = gtk_drag_begin( m_widget,
target_list,
(GdkDragAction)allowed_actions,
g_lastButtonNumber, // number of mouse button which started drag
(GdkEvent*) g_lastMouseEvent );
if ( !context )
{
// this can happen e.g. if gdk_pointer_grab() failed
return wxDragError;
}
m_dragContext = context;
PrepareIcon( allowed_actions, context );
while (m_waiting)
gtk_main_iteration();
g_signal_handlers_disconnect_by_func (m_iconWindow,
(gpointer) gtk_dnd_window_configure_callback, this);
return m_retValue;
}
void wxDropSource::GTKConnectDragSignals()
{
if (!m_widget)
return;
g_blockEventsOnDrag = true;
g_signal_connect (m_widget, "drag_data_get",
G_CALLBACK (source_drag_data_get), this);
g_signal_connect (m_widget, "drag_end",
G_CALLBACK (source_drag_end), this);
}
void wxDropSource::GTKDisconnectDragSignals()
{
if (!m_widget)
return;
g_blockEventsOnDrag = false;
g_signal_handlers_disconnect_by_func (m_widget,
(gpointer) source_drag_data_get,
this);
g_signal_handlers_disconnect_by_func (m_widget,
(gpointer) source_drag_end,
this);
}
#endif
// wxUSE_DRAG_AND_DROP
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