X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/848332140be2d53aea32d0702f4c0e06c149d24b..d67fc8b73514909eb198223333e11be4d900f431:/src/gtk/dnd.cpp diff --git a/src/gtk/dnd.cpp b/src/gtk/dnd.cpp index 884ad11f27..0ce223efb4 100644 --- a/src/gtk/dnd.cpp +++ b/src/gtk/dnd.cpp @@ -1,5 +1,5 @@ /////////////////////////////////////////////////////////////////////////////// -// Name: dnd.cpp +// Name: src/gtk/dnd.cpp // Purpose: wxDropTarget class // Author: Robert Roebling // Id: $Id$ @@ -10,24 +10,22 @@ // 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 +#include "wx/scopeguard.h" -#include -#include +#include //---------------------------------------------------------------------------- // global data @@ -41,7 +39,12 @@ 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) -static const wxChar *TRACE_DND = _T("dnd"); +#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 @@ -145,7 +148,7 @@ static wxDragResult ConvertFromGTK(long action) case GDK_ACTION_MOVE: return wxDragMove; } - + return wxDragNone; } @@ -159,11 +162,9 @@ static void target_drag_leave( GtkWidget *WXUNUSED(widget), 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 ); + drop_target->GTKSetDragContext( context ); /* we don't need return values. this event is just for information */ @@ -173,7 +174,7 @@ static void target_drag_leave( GtkWidget *WXUNUSED(widget), drop_target->m_firstMotion = true; /* after this, invalidate the drop_target's GdkDragContext */ - drop_target->SetDragContext( (GdkDragContext*) NULL ); + drop_target->GTKSetDragContext( NULL ); } } @@ -189,86 +190,65 @@ static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget), 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 ); - - // 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 result; - if (drop_target->GetDefaultAction() == wxDragNone) - { - // use default action set by wxDropSource::DoDragDrop() - if ( (gs_flagsForDrag & wxDrag_DefaultMove) == wxDrag_DefaultMove && - (context->actions & GDK_ACTION_MOVE ) ) +#if 0 + wxPrintf( "motion\n" ); + GList *tmp_list; + for (tmp_list = context->targets; tmp_list; tmp_list = tmp_list->next) { - // move is requested by the program and allowed by GTK+ - do it, even - // though suggested_action may be currently wxDragCopy - result = wxDragMove; + wxString atom = wxString::FromAscii( gdk_atom_name (GDK_POINTER_TO_ATOM (tmp_list->data)) ); + wxPrintf( "Atom: %s\n", atom ); } - else // use whatever GTK+ says we should - { - result = ConvertFromGTK(context->suggested_action); +#endif - 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 + // 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) { - if (context->actions & GDK_ACTION_COPY) - result = wxDragCopy; - else if (context->actions & GDK_ACTION_MOVE) - result = wxDragMove; - else - result = wxDragNone; + 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, result ); + // 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, result ); + // give program a chance to react (i.e. to say no by returning FALSE) + result = drop_target->OnDragOver( x, y, suggested_action ); } - bool ret = wxIsDragResultOk( result ); + 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) && + (context->actions & result_action)); + if (ret) - { - GdkDragAction action; - if (result == wxDragCopy) - action = GDK_ACTION_COPY; - else if (result == wxDragLink) - action = GDK_ACTION_LINK; - else - action = GDK_ACTION_MOVE; - - gdk_drag_status( context, action, time ); - } + gdk_drag_status( context, result_action, time ); - /* after this, invalidate the drop_target's GdkDragContext */ - drop_target->SetDragContext( (GdkDragContext*) NULL ); + // after this, invalidate the drop_target's GdkDragContext + drop_target->GTKSetDragContext( NULL ); - /* this has to be done because GDK has no "drag_enter" event */ + // this has to be done because GDK has no "drag_enter" event drop_target->m_firstMotion = false; return ret; @@ -287,35 +267,38 @@ static gboolean target_drag_drop( GtkWidget *widget, 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 ); + 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->SetDragWidget( widget ); + drop_target->GTKSetDragWidget( 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; -*/ + drop_target->GTKSetDragTime( time ); /* reset the block here as someone might very well show a dialog as a reaction to a drop and this @@ -336,38 +319,25 @@ static gboolean target_drag_drop( GtkWidget *widget, } else { - wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned TRUE") ); + wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned true") ); -#if wxUSE_THREADS - /* disable GUI threads */ -#endif - - GdkAtom format = drop_target->GetMatchingPair(); + GdkAtom format = drop_target->GTKGetMatchingPair(); // this does happen somehow, see bug 555111 - wxCHECK_MSG( format, FALSE, _T("no matching GdkAtom for format?") ) + wxCHECK_MSG( format, FALSE, wxT("no matching GdkAtom for 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 */ -#endif } /* after this, invalidate the drop_target's GdkDragContext */ - drop_target->SetDragContext( (GdkDragContext*) NULL ); + drop_target->GTKSetDragContext( NULL ); /* after this, invalidate the drop_target's drag widget */ - drop_target->SetDragWidget( (GtkWidget*) NULL ); + drop_target->GTKSetDragWidget( NULL ); /* this has to be done because GDK has no "drag_enter" event */ drop_target->m_firstMotion = true; @@ -390,8 +360,6 @@ static void target_drag_data_received( GtkWidget *WXUNUSED(widget), guint time, wxDropTarget *drop_target ) { - if (g_isIdle) wxapp_install_idle_handler(); - /* Owen Taylor: "call gtk_drag_finish() with success == TRUE" */ @@ -408,13 +376,13 @@ static void target_drag_data_received( GtkWidget *WXUNUSED(widget), /* inform the wxDropTarget about the current GtkSelectionData. this is only valid for the duration of this call */ - drop_target->SetDragData( data ); + drop_target->GTKSetDragData( data ); wxDragResult result = ConvertFromGTK(context->action); if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) ) { - wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned TRUE") ); + wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned true") ); /* tell GTK that data transfer was successful */ gtk_drag_finish( context, TRUE, FALSE, time ); @@ -428,7 +396,7 @@ static void target_drag_data_received( GtkWidget *WXUNUSED(widget), } /* after this, invalidate the drop_target's drag data */ - drop_target->SetDragData( (GtkSelectionData*) NULL ); + drop_target->GTKSetDragData( NULL ); } } @@ -440,9 +408,9 @@ wxDropTarget::wxDropTarget( wxDataObject *data ) : wxDropTargetBase( data ) { m_firstMotion = true; - m_dragContext = (GdkDragContext*) NULL; - m_dragWidget = (GtkWidget*) NULL; - m_dragData = (GtkSelectionData*) NULL; + m_dragContext = NULL; + m_dragWidget = NULL; + m_dragData = NULL; m_dragTime = 0; } @@ -450,38 +418,85 @@ 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; + return def; } bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) ) { - if (!m_dataObject) - return false; - - return (GetMatchingPair() != (GdkAtom) 0); + return true; } wxDragResult wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxDragResult def ) { - if (!m_dataObject) - return wxDragNone; + return GetData() ? def : wxDragNone; +} - if (GetMatchingPair() == (GdkAtom) 0) - return 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; + if (GetDefaultAction() == wxDragNone) + { + // use default action set by wxDropSource::DoDragDrop() + if ( (gs_flagsForDrag & wxDrag_DefaultMove) == wxDrag_DefaultMove && + (m_dragContext->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(m_dragContext->suggested_action); + +#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 && + (m_dragContext->actions & GDK_ACTION_MOVE)) + { - return GetData() ? def : wxDragNone; + suggested_action = wxDragMove; + } + else + { + if (m_dragContext->actions & GDK_ACTION_COPY) + suggested_action = wxDragCopy; + else if (m_dragContext->actions & GDK_ACTION_MOVE) + suggested_action = wxDragMove; + else if (m_dragContext->actions & GDK_ACTION_LINK) + suggested_action = wxDragLink; + else + suggested_action = wxDragNone; + } + + return suggested_action; } -GdkAtom wxDropTarget::GetMatchingPair() +wxDataFormat wxDropTarget::GetMatchingPair() +{ + return wxDataFormat( GTKGetMatchingPair() ); +} + +GdkAtom wxDropTarget::GTKGetMatchingPair(bool quiet) { if (!m_dataObject) return (GdkAtom) 0; @@ -495,10 +510,11 @@ GdkAtom wxDropTarget::GetMatchingPair() GdkAtom formatAtom = (GdkAtom)(child->data); wxDataFormat format( formatAtom ); -#ifdef __WXDEBUG__ - wxLogTrace(TRACE_DND, wxT("Drop target: drag has format: %s"), - format.GetId().c_str()); -#endif // Debug + if ( !quiet ) + { + wxLogTrace(TRACE_DND, wxT("Drop target: drag has format: %s"), + format.GetId().c_str()); + } if (m_dataObject->IsSupportedFormat( format )) return formatAtom; @@ -527,7 +543,7 @@ bool wxDropTarget::GetData() return true; } -void wxDropTarget::UnregisterWidget( GtkWidget *widget ) +void wxDropTarget::GtkUnregisterWidget( GtkWidget *widget ) { wxCHECK_RET( widget != NULL, wxT("unregister widget is NULL") ); @@ -543,7 +559,7 @@ void wxDropTarget::UnregisterWidget( GtkWidget *widget ) (gpointer) target_drag_data_received, this); } -void wxDropTarget::RegisterWidget( GtkWidget *widget ) +void wxDropTarget::GtkRegisterWidget( GtkWidget *widget ) { wxCHECK_RET( widget != NULL, wxT("register widget is NULL") ); @@ -559,7 +575,7 @@ void wxDropTarget::RegisterWidget( GtkWidget *widget ) gtk_drag_dest_set( widget, (GtkDestDefaults) 0, /* no default behaviour */ - (GtkTargetEntry*) NULL, /* we don't supply any formats here */ + NULL, /* we don't supply any formats here */ 0, /* number of targets = 0 */ (GdkDragAction) 0 ); /* we don't supply any actions here */ @@ -583,20 +599,18 @@ void wxDropTarget::RegisterWidget( GtkWidget *widget ) extern "C" { static void source_drag_data_get (GtkWidget *WXUNUSED(widget), - GdkDragContext *WXUNUSED(context), + 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 ); wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"), format.GetId().c_str()); - drop_source->m_retValue = wxDragCancel; + drop_source->m_retValue = wxDragError; wxDataObject *data = drop_source->GetDataObject(); @@ -630,9 +644,7 @@ source_drag_data_get (GtkWidget *WXUNUSED(widget), return; } -#if wxUSE_THREADS - /* disable GUI threads */ -#endif + drop_source->m_retValue = ConvertFromGTK( context->action ); gtk_selection_data_set( selection_data, selection_data->target, @@ -640,46 +652,10 @@ source_drag_data_get (GtkWidget *WXUNUSED(widget), d, size ); -#if wxUSE_THREADS - /* enable GUI threads */ -#endif - delete[] d; } } -//---------------------------------------------------------------------------- -// "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" //---------------------------------------------------------------------------- @@ -689,10 +665,6 @@ static void source_drag_end( GtkWidget *WXUNUSED(widget), GdkDragContext *WXUNUSED(context), wxDropSource *drop_source ) { - if (g_isIdle) wxapp_install_idle_handler(); - - // printf( "Drag source: drag_end.\n" ); - drop_source->m_waiting = false; } } @@ -705,9 +677,6 @@ extern "C" { 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; @@ -725,13 +694,13 @@ wxDropSource::wxDropSource(wxWindow *win, { m_waiting = true; - m_iconWindow = (GtkWidget*) NULL; + m_iconWindow = NULL; m_window = win; m_widget = win->m_widget; if (win->m_wxwindow) m_widget = win->m_wxwindow; - m_retValue = wxDragCancel; + m_retValue = wxDragNone; SetIcons(iconCopy, iconMove, iconNone); } @@ -746,13 +715,13 @@ wxDropSource::wxDropSource(wxDataObject& data, SetData( data ); - m_iconWindow = (GtkWidget*) NULL; + m_iconWindow = NULL; m_window = win; m_widget = win->m_widget; if (win->m_wxwindow) m_widget = win->m_wxwindow; - m_retValue = wxDragCancel; + m_retValue = wxDragNone; SetIcons(iconCopy, iconMove, iconNone); } @@ -792,19 +761,19 @@ void wxDropSource::PrepareIcon( int action, GdkDragContext *context ) if ( icon->GetMask() ) mask = icon->GetMask()->GetBitmap(); else - mask = (GdkBitmap *)NULL; + mask = NULL; 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 (); @@ -831,14 +800,20 @@ wxDragResult wxDropSource::DoDragDrop(int flags) 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; - GtkTargetList *target_list = gtk_target_list_new( (GtkTargetEntry*) NULL, 0 ); + GtkTargetList *target_list = gtk_target_list_new( NULL, 0 ); wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ]; m_data->GetAllFormats( array ); @@ -846,102 +821,69 @@ wxDragResult wxDropSource::DoDragDrop(int flags) 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 )); + wxLogTrace(TRACE_DND, wxT("Drop source: 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 = (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 + int allowed_actions = GDK_ACTION_COPY; + if ( flags & wxDrag_AllowMove ) + allowed_actions |= GDK_ACTION_MOVE; - /* 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; + // 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; + m_retValue = wxDragCancel; - 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 ); - - m_dragContext = context; - - PrepareIcon( action, context ); + (GdkDragAction)allowed_actions, + g_lastButtonNumber, // number of mouse button which started drag + (GdkEvent*) g_lastMouseEvent ); - 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( allowed_actions, context ); - UnregisterWindow(); + while (m_waiting) + gtk_main_iteration(); 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);