///////////////////////////////////////////////////////////////////////////////
-// Name: dnd.cpp
+// Name: src/gtk/dnd.cpp
// Purpose: wxDropTarget class
// Author: Robert Roebling
// Id: $Id$
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
-#include "wx/dnd.h"
-#include "wx/log.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 "wx/dnd.h"
-#include "wx/gtk/private.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 <gdk/gdkprivate.h>
+#include "wx/scopeguard.h"
-#include <gtk/gtkdnd.h>
-#include <gtk/gtkselection.h>
-
-//-----------------------------------------------------------------------------
-// idle system
-//-----------------------------------------------------------------------------
-
-extern void wxapp_install_idle_handler();
-extern bool g_isIdle;
+#include <gtk/gtk.h>
//----------------------------------------------------------------------------
// global data
// the flags used for the last DoDragDrop()
static long gs_flagsForDrag = 0;
+#ifdef __WXDEBUG__
// 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)
static const wxChar *TRACE_DND = _T("dnd");
+#endif
+
+// global variables because GTK+ DnD want to have the
+// mouse event that caused it
+extern GdkEvent *g_lastMouseEvent;
+extern int g_lastButtonNumber;
//----------------------------------------------------------------------------
// standard icons
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 );
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" */
+#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->SetDragContext( context );
if (drop_target->GetDefaultAction() == wxDragNone)
{
// use default action set by wxDropSource::DoDragDrop()
- if ( (gs_flagsForDrag & wxDrag_DefaultMove) == wxDrag_DefaultMove &&
+ if ( (gs_flagsForDrag & wxDrag_DefaultMove) == wxDrag_DefaultMove &&
(context->actions & GDK_ACTION_MOVE ) )
- {
- // move is requested by the program and allowed by GTK+ - do it, even
- // though suggested_action may be currently wxDragCopy
- result = wxDragMove;
- }
- else // use whatever GTK+ says we should
- {
- result = ConvertFromGTK(context->suggested_action);
-
- if ( (result == wxDragMove) && !(gs_flagsForDrag & wxDrag_AllowMove) )
{
- // we're requested to move but we can't
- result = wxDragCopy;
+ // move is requested by the program and allowed by GTK+ - do it, even
+ // though suggested_action may be currently wxDragCopy
+ result = wxDragMove;
+ }
+ else // use whatever GTK+ says we should
+ {
+ result = ConvertFromGTK(context->suggested_action);
+
+ if ( (result == wxDragMove) && !(gs_flagsForDrag & wxDrag_AllowMove) )
+ {
+ // we're requested to move but we can't
+ result = wxDragCopy;
+ }
}
- }
}
else if (drop_target->GetDefaultAction() == wxDragMove &&
(context->actions & GDK_ACTION_MOVE))
{
+
result = wxDragMove;
}
else
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.. */
if (!ret)
{
+#ifdef __WXDEBUG__
wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned FALSE") );
+#endif
/* cancel the whole thing */
gtk_drag_finish( context,
}
else
{
- wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned TRUE") );
+#ifdef __WXDEBUG__
+ wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned true") );
+#endif
#if wxUSE_THREADS
/* disable GUI threads */
GdkAtom format = drop_target->GetMatchingPair();
// this does happen somehow, see bug 555111
- wxCHECK_MSG( format, FALSE, _T("no matching GdkAtom for format?") )
+ wxCHECK_MSG( format, FALSE, _T("no matching GdkAtom for format?") );
/*
GdkDragAction action = GDK_ACTION_MOVE;
guint time,
wxDropTarget *drop_target )
{
- if (g_isIdle) wxapp_install_idle_handler();
-
/* Owen Taylor: "call gtk_drag_finish() with
success == TRUE" */
return;
}
+#ifdef __WXDEBUG__
wxLogTrace(TRACE_DND, wxT( "Drop target: data received event") );
+#endif
/* inform the wxDropTarget about the current GtkSelectionData.
this is only valid for the duration of this call */
if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) )
{
- wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned TRUE") );
+#ifdef __WXDEBUG__
+ wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned true") );
+#endif
/* tell GTK that data transfer was successful */
gtk_drag_finish( context, TRUE, FALSE, time );
}
else
{
+#ifdef __WXDEBUG__
wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned FALSE") );
+#endif
/* tell GTK that data transfer was not successful */
gtk_drag_finish( context, FALSE, FALSE, time );
guint WXUNUSED(time),
wxDropSource *drop_source )
{
- if (g_isIdle) wxapp_install_idle_handler();
-
wxDataFormat format( selection_data->target );
+#ifdef __WXDEBUG__
wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"),
format.GetId().c_str());
+#endif
drop_source->m_retValue = wxDragCancel;
if (!data)
{
+#ifdef __WXDEBUG__
wxLogTrace(TRACE_DND, wxT("Drop source: no data object") );
- return;
+#endif
+ return;
}
if (!data->IsSupportedFormat(format))
{
+#ifdef __WXDEBUG__
wxLogTrace(TRACE_DND, wxT("Drop source: unsupported format") );
- return;
+#endif
+ return;
}
if (data->GetDataSize(format) == 0)
{
+#ifdef __WXDEBUG__
wxLogTrace(TRACE_DND, wxT("Drop source: empty data") );
- return;
+#endif
+ return;
}
size_t size = data->GetDataSize(format);
}
}
-//----------------------------------------------------------------------------
-// "drag_data_delete"
-//----------------------------------------------------------------------------
-
-extern "C" {
-static void source_drag_data_delete( GtkWidget *WXUNUSED(widget),
- GdkDragContext *context,
- wxDropSource *WXUNUSED(drop_source) )
-{
- if (g_isIdle)
- wxapp_install_idle_handler();
-
- // printf( "Drag source: drag_data_delete\n" );
-}
-}
-
-//----------------------------------------------------------------------------
-// "drag_begin"
-//----------------------------------------------------------------------------
-
-extern "C" {
-static void source_drag_begin( GtkWidget *WXUNUSED(widget),
- GdkDragContext *WXUNUSED(context),
- wxDropSource *WXUNUSED(drop_source) )
-{
- if (g_isIdle)
- wxapp_install_idle_handler();
-
- // printf( "Drag source: drag_begin.\n" );
-}
-}
-
//----------------------------------------------------------------------------
// "drag_end"
//----------------------------------------------------------------------------
GdkDragContext *WXUNUSED(context),
wxDropSource *drop_source )
{
- if (g_isIdle) wxapp_install_idle_handler();
-
// printf( "Drag source: drag_end.\n" );
drop_source->m_waiting = false;
static gint
gtk_dnd_window_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDropSource *source )
{
- if (g_isIdle)
- wxapp_install_idle_handler();
-
source->GiveFeedback( ConvertFromGTK(source->m_dragContext->action) );
return 0;
GdkPixmap *pixmap = icon->GetPixmap();
gint width,height;
- gdk_window_get_size (pixmap, &width, &height);
+ gdk_drawable_get_size (pixmap, &width, &height);
GdkColormap *colormap = gtk_widget_get_colormap( m_widget );
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_set_app_paintable (m_iconWindow, TRUE);
gtk_widget_pop_colormap ();
if (g_blockEventsOnDrag)
return wxDragNone;
- // disabled for now
- g_blockEventsOnDrag = true;
+ // don't start dragging if no button is down
+ if (g_lastButtonNumber == 0)
+ return wxDragNone;
- RegisterWindow();
+ // 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;
for (size_t i = 0; i < count; i++)
{
GdkAtom atom = array[i];
+#ifdef __WXDEBUG__
wxLogTrace(TRACE_DND, wxT("Drop source: Supported atom %s"), gdk_atom_name( atom ));
- gtk_target_list_add( target_list, atom, 0, 0 );
+#endif
+ 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 = (guint32)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 */
-#endif
-
- /* don't start dragging if no button is down */
- if (button_number)
- {
- int action = GDK_ACTION_COPY;
- if ( flags & wxDrag_AllowMove )
- action |= GDK_ACTION_MOVE;
+ int action = GDK_ACTION_COPY;
+ if ( flags & wxDrag_AllowMove )
+ action |= 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;
+ // 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;
- GdkDragContext *context = gtk_drag_begin( m_widget,
+ GdkDragContext *context = gtk_drag_begin( m_widget,
target_list,
(GdkDragAction)action,
- button_number, /* number of mouse button which started drag */
- (GdkEvent*) &event );
+ g_lastButtonNumber, // number of mouse button which started drag
+ (GdkEvent*) g_lastMouseEvent );
- m_dragContext = context;
-
- PrepareIcon( action, context );
-
- while (m_waiting)
- gtk_main_iteration();
-
- m_retValue = ConvertFromGTK(context->action);
- if ( m_retValue == wxDragNone )
- m_retValue = wxDragCancel;
+ if ( !context )
+ {
+ // this can happen e.g. if gdk_pointer_grab() failed
+ return wxDragError;
}
-#if wxUSE_THREADS
- /* re-enable GUI threads */
-#endif
+ m_dragContext = context;
- g_blockEventsOnDrag = false;
+ PrepareIcon( action, context );
+
+ while (m_waiting)
+ gtk_main_iteration();
- UnregisterWindow();
+ m_retValue = ConvertFromGTK(context->action);
+ if ( m_retValue == wxDragNone )
+ m_retValue = wxDragCancel;
return m_retValue;
}
-void wxDropSource::RegisterWindow()
+void wxDropSource::GTKConnectDragSignals()
{
- if (!m_widget) return;
+ 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_data_delete",
- G_CALLBACK (source_drag_data_delete), this);
- g_signal_connect (m_widget, "drag_begin",
- G_CALLBACK (source_drag_begin), this);
g_signal_connect (m_widget, "drag_end",
G_CALLBACK (source_drag_end), this);
}
-void wxDropSource::UnregisterWindow()
+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_data_delete,
- this);
- g_signal_handlers_disconnect_by_func (m_widget,
- (gpointer) source_drag_begin,
- this);
g_signal_handlers_disconnect_by_func (m_widget,
(gpointer) source_drag_end,
this);
projects / wxWidgets.git / blobdiff