// Name: dnd.cpp
// Purpose: wxDropTarget class
// Author: Robert Roebling
-// Copyright: Robert Roebling
-// Licence: wxWindows license
+// Id: $Id$
+// Copyright: (c) 1998 Robert Roebling
+// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#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/intl.h"
+#include "wx/utils.h"
+#include "gdk/gdk.h"
+#include "gtk/gtk.h"
#include "gdk/gdkprivate.h"
-#include <X11/Xlib.h>
+#include "gtk/gtkdnd.h"
+#include "gtk/gtkselection.h"
-// ----------------------------------------------------------------------------
-// global
-// ----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+// 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 * gv_xpm[] = {
+"40 34 3 1",
+" s None c None",
+". c black",
+"X c white",
+" ",
+" ",
+" ...... ",
+" ..XXXXXX.. ",
+" .XXXXXXXXXX. ",
+" .XXXXXXXXXXXX. ",
+" .XXXXXXXXXXXX. ",
+" .XXXXXXXXXXXXXX. ",
+" .XXX..XXXX..XXX. ",
+" ....XX....XX....XX. ",
+" .XXX.XXX..XXXX..XXX.... ",
+" .XXXXXXXXXXXXXXXXXXX.XXX. ",
+" .XXXXXXXXXXXXXXXXXXXXXXXX. ",
+" .XXXXXXXXXXXXXXXXXXXXXXXX. ",
+" ..XXXXXXXXXXXXXXXXXXXXXX. ",
+" .XXXXXXXXXXXXXXXXXX... ",
+" ..XXXXXXXXXXXXXXXX. ",
+" .XXXXXXXXXXXXXXXX. ",
+" .XXXXXXXXXXXXXXXX. ",
+" .XXXXXXXXXXXXXXXXX. ",
+" .XXXXXXXXXXXXXXXXX. ",
+" .XXXXXXXXXXXXXXXXXX. ",
+" .XXXXXXXXXXXXXXXXXXX. ",
+" .XXXXXXXXXXXXXXXXXXXXX. ",
+" .XXXXXXXXXXXXXX.XXXXXXX. ",
+" .XXXXXXX.XXXXXXX.XXXXXXX. ",
+" .XXXXXXXX.XXXXXXX.XXXXXXX. ",
+" .XXXXXXX...XXXXX...XXXXX. ",
+" .XXXXXXX. ..... ..... ",
+" ..XXXX.. ",
+" .... ",
+" ",
+" ",
+" "};
+
+/* 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. ",
+" ......................... "};
+
+
+
// ----------------------------------------------------------------------------
-// wxDropTarget
+// "drag_leave"
// ----------------------------------------------------------------------------
-wxDropTarget::wxDropTarget()
+static void target_drag_leave( GtkWidget *WXUNUSED(widget),
+ GdkDragContext *context,
+ guint WXUNUSED(time),
+ wxDropTarget *drop_target )
{
-};
+ if (g_isIdle) wxapp_install_idle_handler();
-wxDropTarget::~wxDropTarget()
-{
-};
+ /* inform the wxDropTarget about the current GdkDragContext.
+ this is only valid for the duration of this call */
+ drop_target->SetDragContext( context );
-void wxDropTarget::Drop( GdkEvent *event, int x, int y )
-{
- printf( "Drop data is of type %s.\n", event->dropdataavailable.data_type );
-
- OnDrop( x, y, (char *)event->dropdataavailable.data);
-};
+ /* we don't need return values. this event is just for
+ information */
+ drop_target->OnLeave();
-void wxDropTarget::UnregisterWidget( GtkWidget *widget )
+ /* 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 (!widget) return;
-
- gtk_widget_dnd_drop_set( widget, FALSE, NULL, 0, FALSE );
-};
+ if (g_isIdle) wxapp_install_idle_handler();
-void wxDropTarget::RegisterWidget( GtkWidget *widget )
+ /* 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 );
+
+ bool ret = FALSE;
+
+ if (drop_target->m_firstMotion)
+ {
+ /* the first "drag_motion" event substitutes a "drag_enter" event */
+ ret = drop_target->OnEnter( x, y );
+ }
+ else
+ {
+ /* give program a chance to react (i.e. to say no by returning FALSE) */
+ ret = drop_target->OnMove( x, y );
+ }
+
+ /* we don't yet handle which "actions" (i.e. copy or move)
+ the target accepts. so far we simply accept the
+ suggested action. TODO. */
+ if (ret)
+ gdk_drag_status( context, context->suggested_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 )
{
- wxString formats;
- int valid = 0;
-
- for ( uint i = 0; i < GetFormatCount(); i++ )
- {
- wxDataFormat df = GetFormat( i );
- switch (df)
+ 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 );
+
+ 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
{
- case wxDF_TEXT:
- if (i > 0) formats += ";";
- formats += "text/plain";
- valid++;
- break;
- case wxDF_FILENAME:
- if (i > 0) formats += ";";
- formats += "url:any";
- valid++;
- break;
- default:
- break;
- };
- }
-
- char *str = WXSTRINGCAST formats;
-
- gtk_widget_dnd_drop_set( widget, TRUE, &str, valid, FALSE );
-};
+ 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 );
+
+ /* 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;
+}
// ----------------------------------------------------------------------------
-// wxTextDropTarget
+// "drag_data_received"
// ----------------------------------------------------------------------------
-bool wxTextDropTarget::OnDrop( long x, long y, const void *pData )
+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 )
{
- OnDropText( x, y, (const char*)pData );
- return TRUE;
-};
+ 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
+//----------------------------------------------------------------------------
-bool wxTextDropTarget::OnDropText( long x, long y, const char *psz )
+wxDropTarget::wxDropTarget( wxDataObject *data )
+ : wxDropTargetBase( data )
{
- printf( "Got dropped text: %s.\n", psz );
- printf( "At x: %d, y: %d.\n", (int)x, (int)y );
- return TRUE;
-};
+ m_firstMotion = TRUE;
+ m_dragContext = (GdkDragContext*) NULL;
+ m_dragWidget = (GtkWidget*) NULL;
+ m_dragData = (GtkSelectionData*) NULL;
+ m_dragTime = 0;
+}
+
+bool wxDropTarget::OnEnter( int WXUNUSED(x), int WXUNUSED(y) )
+{
+ if (!m_dataObject)
+ return FALSE;
+
+ return (GetMatchingPair() != (GdkAtom) 0);
+}
+
+bool wxDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) )
+{
+ if (!m_dataObject)
+ return FALSE;
+
+ return (GetMatchingPair() != (GdkAtom) 0);
+}
-size_t wxTextDropTarget::GetFormatCount() const
+bool wxDropTarget::OnDrop( int WXUNUSED(x), int WXUNUSED(y) )
{
- return 1;
+ if (!m_dataObject)
+ return FALSE;
+
+ return (GetMatchingPair() != (GdkAtom) 0);
}
-wxDataFormat wxTextDropTarget::GetFormat(size_t WXUNUSED(n)) const
+bool wxDropTarget::OnData( int WXUNUSED(x), int WXUNUSED(y) )
{
- return wxDF_TEXT;
+ 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 );
+ if (name) wxLogDebug( "Drop target: drag has format: %s", name );
+#endif
+ 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 );
}
// ----------------------------------------------------------------------------
-// wxFileDropTarget
+// wxTextDropTarget
// ----------------------------------------------------------------------------
-bool wxFileDropTarget::OnDropFiles( long x, long y, size_t nFiles, const char * const WXUNUSED(aszFiles)[] )
+wxTextDropTarget::wxTextDropTarget()
+ : wxDropTarget(new wxTextDataObject)
{
- printf( "Got %d dropped files.\n", (int)nFiles );
- printf( "At x: %d, y: %d.\n", (int)x, (int)y );
- return TRUE;
}
-bool wxFileDropTarget::OnDrop(long x, long y, const void *WXUNUSED(pData) )
+bool wxTextDropTarget::OnData(wxCoord x, wxCoord y)
{
- char *str = "/this/is/a/path.txt";
+ if ( !GetData() )
+ return FALSE;
- return OnDropFiles(x, y, 1, &str );
+ return OnDropText(x, y, ((wxTextDataObject *)m_dataObject)->GetText());
}
-size_t wxFileDropTarget::GetFormatCount() const
+// ----------------------------------------------------------------------------
+// wxFileDropTarget
+// ----------------------------------------------------------------------------
+
+wxFileDropTarget::wxFileDropTarget()
+ : wxDropTarget(new wxFileDataObject)
{
- return 1;
}
-wxDataFormat wxFileDropTarget::GetFormat(size_t WXUNUSED(n)) const
+bool wxFileDropTarget::OnData(wxCoord x, wxCoord y)
{
- return wxDF_FILENAME;
+ if ( !GetData() )
+ return FALSE;
+
+ return OnDropFiles(x, y,
+ ((wxFileDataObject *)m_dataObject)->GetFilenames());
}
-//-------------------------------------------------------------------------
-// wxDropSource
-//-------------------------------------------------------------------------
+//----------------------------------------------------------------------------
+// "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();
-//-----------------------------------------------------------------------------
-// drag request
+ 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;
+ }
-void gtk_drag_callback( GtkWidget *widget, GdkEvent *event, wxDropSource *source )
+#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 )
{
- printf( "Data requested for dropping.\n" );
-
- wxDataObject *data = source->m_data;
-
- uint size = data->GetDataSize();
- char *ptr = new char[size];
- data->GetDataHere( ptr );
-
- gtk_widget_dnd_data_set( widget, event, ptr, size );
-
- delete ptr;
-
- source->m_retValue = wxDropSource::Copy;
-};
-
-wxDropSource::wxDropSource( wxWindow *win )
+ 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) )
{
- g_blockEventsOnDrag = TRUE;
-
- m_window = win;
- m_widget = win->m_widget;
- if (win->m_wxwindow) m_widget = win->m_wxwindow;
-
- m_data = NULL;
- m_retValue = Cancel;
-
- m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
- m_goaheadCursor = wxCursor( wxCURSOR_HAND );
-};
-
-wxDropSource::wxDropSource( wxDataObject &data, wxWindow *win )
+ 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 )
{
- g_blockEventsOnDrag = TRUE;
-
- m_window = win;
- m_widget = win->m_widget;
- if (win->m_wxwindow) m_widget = win->m_wxwindow;
- m_retValue = Cancel;
-
- m_data = &data;
-
- m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
- m_goaheadCursor = wxCursor( wxCURSOR_HAND );
-};
-
-void wxDropSource::SetData( wxDataObject &data )
+ if (g_isIdle) wxapp_install_idle_handler();
+
+// printf( "drag_end.\n" );
+
+ drop_source->m_waiting = FALSE;
+}
+
+//---------------------------------------------------------------------------
+// wxDropSource
+//---------------------------------------------------------------------------
+
+wxDropSource::wxDropSource( wxWindow *win, const wxIcon &go, const wxIcon &stop )
{
- m_data = &data;
-};
+ g_blockEventsOnDrag = TRUE;
+ m_waiting = TRUE;
+
+ m_window = win;
+ m_widget = win->m_widget;
+ if (win->m_wxwindow) m_widget = win->m_wxwindow;
+
+ m_retValue = wxDragCancel;
-wxDropSource::~wxDropSource(void)
+ m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
+ m_goaheadCursor = wxCursor( wxCURSOR_HAND );
+
+ m_goIcon = go;
+ if (wxNullIcon == go) m_goIcon = wxIcon( page_xpm );
+ m_stopIcon = stop;
+ if (wxNullIcon == stop) m_stopIcon = wxIcon( gv_xpm );
+}
+
+wxDropSource::wxDropSource( wxDataObject& data, wxWindow *win,
+ const wxIcon &go, const wxIcon &stop )
{
-// if (m_data) delete m_data;
+ m_waiting = TRUE;
+
+ SetData( data );
+
+ m_window = win;
+ m_widget = win->m_widget;
+ if (win->m_wxwindow) m_widget = win->m_wxwindow;
+ m_retValue = wxDragCancel;
+
+ m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
+ m_goaheadCursor = wxCursor( wxCURSOR_HAND );
- g_blockEventsOnDrag = FALSE;
-};
-
-wxDropSource::DragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) )
+ m_goIcon = go;
+ if (wxNullIcon == go) m_goIcon = wxIcon( page_xpm );
+ m_stopIcon = stop;
+ if (wxNullIcon == stop) m_stopIcon = wxIcon( gv_xpm );
+}
+
+wxDropSource::~wxDropSource()
{
- if (gdk_dnd.dnd_grabbed) return None;
- if (gdk_dnd.drag_really) return None;
-
- wxASSERT_MSG( data, "wxDragSource: no data" );
-
- if (!m_data) return None;
- if (m_data->GetDataSize() == 0) return None;
-
- GdkWindowPrivate *wp = (GdkWindowPrivate*) m_widget->window;
-
- RegisterWindow();
-
- gdk_dnd.drag_perhaps = TRUE;
-
- gdk_dnd.dnd_drag_start.x = 5;
- gdk_dnd.dnd_drag_start.y = 5;
- gdk_dnd.real_sw = wp;
-
- if (gdk_dnd.drag_startwindows)
- {
- g_free( gdk_dnd.drag_startwindows );
- gdk_dnd.drag_startwindows = NULL;
- };
- gdk_dnd.drag_numwindows = gdk_dnd.drag_really = 0;
-
- XWindowAttributes dnd_winattr;
- XGetWindowAttributes( gdk_display, wp->xwindow, &dnd_winattr );
- wp->dnd_drag_savedeventmask = dnd_winattr.your_event_mask;
-
- gdk_dnd_drag_addwindow( m_widget->window );
-
- GdkEventDragBegin ev;
- ev.type = GDK_DRAG_BEGIN;
- ev.window = m_widget->window;
- ev.u.allflags = 0;
- ev.u.flags.protocol_version = DND_PROTOCOL_VERSION;
-
- gdk_event_put( (GdkEvent*)&ev );
-
- XGrabPointer( gdk_display, wp->xwindow, False,
- ButtonMotionMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
- GrabModeAsync, GrabModeAsync, gdk_root_window, None, CurrentTime );
-
- gdk_dnd_set_drag_cursors( m_defaultCursor.GetCursor(), m_goaheadCursor.GetCursor() );
-
- gdk_dnd.dnd_grabbed = TRUE;
- gdk_dnd.drag_really = 1;
-
- int x = 0;
- int y = 0;
- gdk_window_get_pointer( m_widget->window, &x, &y, NULL );
-
- gdk_dnd_display_drag_cursor( x, y, FALSE, TRUE );
-
- while (gdk_dnd.drag_really || gdk_dnd.drag_perhaps) wxYield();
-
- UnregisterWindow();
-
- g_blockEventsOnDrag = FALSE;
-
- return m_retValue;
-};
-
-void wxDropSource::RegisterWindow(void)
+ g_blockEventsOnDrag = FALSE;
+}
+
+wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) )
{
- if (!m_data) return;
+ 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();
- wxString formats;
+ m_waiting = TRUE;
+
+ GtkTargetList *target_list = gtk_target_list_new( (GtkTargetEntry*) NULL, 0 );
- wxDataFormat df = m_data->GetPreferredFormat();
-
- switch (df)
+ 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)
{
- case wxDF_TEXT:
- formats += "text/plain";
- break;
- case wxDF_FILENAME:
- formats += "url:any";
- break;
- default:
- break;
+ GdkDragContext *context = gtk_drag_begin( m_widget,
+ target_list,
+ GDK_ACTION_COPY,
+ button_number, /* number of mouse button which started drag */
+ (GdkEvent*) &event );
+
+ wxMask *mask = m_goIcon.GetMask();
+ GdkBitmap *bm = (GdkBitmap *) NULL;
+ if (mask) bm = mask->GetBitmap();
+ GdkPixmap *pm = m_goIcon.GetPixmap();
+
+ gtk_drag_set_icon_pixmap( context,
+ gtk_widget_get_colormap( m_widget ),
+ pm,
+ bm,
+ 0,
+ 0 );
+
+ while (m_waiting) gtk_main_iteration();;
}
-
- char *str = WXSTRINGCAST formats;
-
- gtk_widget_dnd_drag_set( m_widget, TRUE, &str, 1 );
- gtk_signal_connect( GTK_OBJECT(m_widget), "drag_request_event",
- GTK_SIGNAL_FUNC(gtk_drag_callback), (gpointer)this );
-};
+#if wxUSE_THREADS
+ /* re-enable GUI threads */
+ wxapp_install_thread_wakeup();
+#endif
+
+ g_blockEventsOnDrag = FALSE;
+
+ UnregisterWindow();
+
+ return m_retValue;
+}
-void wxDropSource::UnregisterWindow(void)
+void wxDropSource::RegisterWindow()
{
- if (!m_widget) return;
-
- gtk_widget_dnd_drag_set( m_widget, FALSE, NULL, 0 );
-
- gtk_signal_disconnect_by_data( GTK_OBJECT(m_widget), (gpointer)this );
-};
+ 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
projects / wxWidgets.git / blobdiff