don't waste time sending out update UI events for separators, they can't be updated...

[wxWidgets.git] / src / gtk / dnd.cpp

diff --git a/src/gtk/dnd.cpp b/src/gtk/dnd.cpp
index 6ef44f891a2bb405b016da6016b844d7de6399b6..2c54f0805d376a51b24b3ca900e63924cd20af6b 100644 (file)
--- a/src/gtk/dnd.cpp
+++ b/src/gtk/dnd.cpp
@@ -23,12 +23,9 @@
     #include "wx/gdicmn.h"
 #endif
 
     #include "wx/gdicmn.h"
 #endif
 

-#include "wx/gtk/private.h"
+#include "wx/scopeguard.h"

 
 

-#include <gdk/gdkprivate.h>
-
-#include <gtk/gtkdnd.h>
-#include <gtk/gtkselection.h>
+#include <gtk/gtk.h>

 
 //----------------------------------------------------------------------------
 // global data
 
 //----------------------------------------------------------------------------
 // global data


@@ -39,10 +36,17 @@ extern bool g_blockEventsOnDrag;
 // the flags used for the last DoDragDrop()
 static long gs_flagsForDrag = 0;
 
 // 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");
 // 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
 
 //----------------------------------------------------------------------------
 // standard icons


@@ -160,8 +164,6 @@ static void target_drag_leave( GtkWidget *WXUNUSED(widget),
                                guint WXUNUSED(time),
                                wxDropTarget *drop_target )
 {
                                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 );
     /* inform the wxDropTarget about the current GdkDragContext.
        this is only valid for the duration of this call */
     drop_target->SetDragContext( context );


@@ -190,12 +192,20 @@ static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget),
                                     guint time,
                                     wxDropTarget *drop_target )
 {
                                     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" */
 
     /* 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 );
     /* inform the wxDropTarget about the current GdkDragContext.
        this is only valid for the duration of this call */
     drop_target->SetDragContext( context );


@@ -208,27 +218,28 @@ static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget),
     if (drop_target->GetDefaultAction() == wxDragNone)
     {
         // use default action set by wxDropSource::DoDragDrop()
     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 ) )
             (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))
     {
     }
     else if (drop_target->GetDefaultAction() == wxDragMove &&
                 (context->actions & GDK_ACTION_MOVE))
     {

+        

        result = wxDragMove;
     }
     else
        result = wxDragMove;
     }
     else


@@ -288,15 +299,11 @@ static gboolean target_drag_drop( GtkWidget *widget,
                                   guint time,
                                   wxDropTarget *drop_target )
 {
                                   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()" */
 
     /* 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.. */
     /* 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.. */


@@ -327,7 +334,9 @@ static gboolean target_drag_drop( GtkWidget *widget,
 
     if (!ret)
     {
 
     if (!ret)
     {

+#ifdef __WXDEBUG__

         wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned FALSE") );
         wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned FALSE") );

+#endif

 
         /* cancel the whole thing */
         gtk_drag_finish( context,
 
         /* cancel the whole thing */
         gtk_drag_finish( context,


@@ -337,7 +346,9 @@ static gboolean target_drag_drop( GtkWidget *widget,
     }
     else
     {
     }
     else
     {

+#ifdef __WXDEBUG__

         wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned true") );
         wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned true") );

+#endif

 
 #if wxUSE_THREADS
         /* disable GUI threads */
 
 #if wxUSE_THREADS
         /* disable GUI threads */


@@ -391,8 +402,6 @@ static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
                                        guint time,
                                        wxDropTarget *drop_target )
 {
                                        guint time,
                                        wxDropTarget *drop_target )
 {

-    if (g_isIdle) wxapp_install_idle_handler();
-

     /* Owen Taylor: "call gtk_drag_finish() with
        success == TRUE" */
 
     /* Owen Taylor: "call gtk_drag_finish() with
        success == TRUE" */
 


@@ -405,7 +414,9 @@ static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
         return;
     }
 
         return;
     }
 

+#ifdef __WXDEBUG__

     wxLogTrace(TRACE_DND, wxT( "Drop target: data received event") );
     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 */
 
     /* inform the wxDropTarget about the current GtkSelectionData.
        this is only valid for the duration of this call */


@@ -415,14 +426,18 @@ static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
 
     if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) )
     {
 
     if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) )
     {

+#ifdef __WXDEBUG__

         wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned true") );
         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
     {
 
         /* 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") );
         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 );
 
         /* tell GTK that data transfer was not successful */
         gtk_drag_finish( context, FALSE, FALSE, time );


@@ -590,12 +605,12 @@ source_drag_data_get  (GtkWidget          *WXUNUSED(widget),
                        guint               WXUNUSED(time),
                        wxDropSource       *drop_source )
 {
                        guint               WXUNUSED(time),
                        wxDropSource       *drop_source )
 {

-    if (g_isIdle) wxapp_install_idle_handler();
-

     wxDataFormat format( selection_data->target );
 
     wxDataFormat format( selection_data->target );
 

+#ifdef __WXDEBUG__

     wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"),
                format.GetId().c_str());
     wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"),
                format.GetId().c_str());

+#endif

 
     drop_source->m_retValue = wxDragCancel;
 
 
     drop_source->m_retValue = wxDragCancel;
 


@@ -603,20 +618,26 @@ source_drag_data_get  (GtkWidget          *WXUNUSED(widget),
 
     if (!data)
     {
 
     if (!data)
     {

+#ifdef __WXDEBUG__

         wxLogTrace(TRACE_DND, wxT("Drop source: no data object") );
         wxLogTrace(TRACE_DND, wxT("Drop source: no data object") );

-        return;
+#endif
+       return;

     }
 
     if (!data->IsSupportedFormat(format))
     {
     }
 
     if (!data->IsSupportedFormat(format))
     {

+#ifdef __WXDEBUG__

         wxLogTrace(TRACE_DND, wxT("Drop source: unsupported format") );
         wxLogTrace(TRACE_DND, wxT("Drop source: unsupported format") );

-        return;
+#endif
+       return;

     }
 
     if (data->GetDataSize(format) == 0)
     {
     }
 
     if (data->GetDataSize(format) == 0)
     {

+#ifdef __WXDEBUG__

         wxLogTrace(TRACE_DND, wxT("Drop source: empty data") );
         wxLogTrace(TRACE_DND, wxT("Drop source: empty data") );

-        return;
+#endif
+       return;

     }
 
     size_t size = data->GetDataSize(format);
     }
 
     size_t size = data->GetDataSize(format);


@@ -649,38 +670,6 @@ source_drag_data_get  (GtkWidget          *WXUNUSED(widget),
 }
 }
 
 }
 }
 

-//----------------------------------------------------------------------------
-// "drag_data_delete"
-//----------------------------------------------------------------------------
-
-extern "C" {
-static void source_drag_data_delete( GtkWidget *WXUNUSED(widget),
-                                     GdkDragContext *WXUNUSED(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"
 //----------------------------------------------------------------------------
 //----------------------------------------------------------------------------
 // "drag_end"
 //----------------------------------------------------------------------------


@@ -690,8 +679,6 @@ static void source_drag_end( GtkWidget          *WXUNUSED(widget),
                              GdkDragContext     *WXUNUSED(context),
                              wxDropSource       *drop_source )
 {
                              GdkDragContext     *WXUNUSED(context),
                              wxDropSource       *drop_source )
 {

-    if (g_isIdle) wxapp_install_idle_handler();
-

     // printf( "Drag source: drag_end.\n" );
 
     drop_source->m_waiting = false;
     // printf( "Drag source: drag_end.\n" );
 
     drop_source->m_waiting = false;


@@ -706,8 +693,6 @@ extern "C" {
 static gint
 gtk_dnd_window_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDropSource *source )
 {
 static gint
 gtk_dnd_window_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDropSource *source )
 {

-    // don't need to install idle handler, its done from "event" signal
-

     source->GiveFeedback( ConvertFromGTK(source->m_dragContext->action) );
 
     return 0;
     source->GiveFeedback( ConvertFromGTK(source->m_dragContext->action) );
 
     return 0;


@@ -804,7 +789,7 @@ void wxDropSource::PrepareIcon( int action, GdkDragContext *context )
 
     m_iconWindow = gtk_window_new (GTK_WINDOW_POPUP);
     gtk_widget_set_events (m_iconWindow, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
 
     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 ();
 
 
     gtk_widget_pop_colormap ();
 


@@ -831,10 +816,16 @@ wxDragResult wxDropSource::DoDragDrop(int flags)
     if (g_blockEventsOnDrag)
         return wxDragNone;
 
     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;
+
+    // we can only start a drag after a mouse event
+    if (g_lastMouseEvent == NULL)
+        return wxDragNone;

 
 

-    RegisterWindow();
+    GTKConnectDragSignals();
+    wxON_BLOCK_EXIT_OBJ0(*this, wxDropSource::GTKDisconnectDragSignals);

 
     m_waiting = true;
 
 
     m_waiting = true;
 


@@ -846,110 +837,72 @@ wxDragResult wxDropSource::DoDragDrop(int flags)
     for (size_t i = 0; i < count; i++)
     {
         GdkAtom atom = array[i];
     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 ));
         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;
 
     }
     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;
+    int action = GDK_ACTION_COPY;
+    if ( flags & wxDrag_AllowMove )
+        action |= GDK_ACTION_MOVE;

 
 

-#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;
-
-        // 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,
                 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 );

 
 

-    UnregisterWindow();
+    while (m_waiting)
+        gtk_main_iteration();

 
 

-    // this shouldn't be needed but somehow, sometimes, without this the cursor
-    // stays grabbed even when the DND operation ends and the application
-    // becomes unresponsive and has to be killed resulting in loss of all
-    // unsaved data, so while this fix is ugly it's still better than
-    // alternative
-    if ( gdk_pointer_is_grabbed() )
-        gdk_pointer_ungrab(GDK_CURRENT_TIME);
+    m_retValue = ConvertFromGTK(context->action);
+    if ( m_retValue == wxDragNone )
+         m_retValue = wxDragCancel;

 
     return m_retValue;
 }
 
 
     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_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);
 
 }
 
     g_signal_connect (m_widget, "drag_end",
                       G_CALLBACK (source_drag_end), this);
 
 }
 

-void wxDropSource::UnregisterWindow()
+void wxDropSource::GTKDisconnectDragSignals()

 {
     if (!m_widget)
         return;
 
 {
     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_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);
     g_signal_handlers_disconnect_by_func (m_widget,
                                           (gpointer) source_drag_end,
                                           this);