///////////////////////////////////////////////////////////////////////////////
-// Name: dnd.cpp
+// Name: src/gtk/dnd.cpp
// Purpose: wxDropTarget class
// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
-// Licence: wxWindows licence
+// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "dnd.h"
-#endif
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#if wxUSE_DRAG_AND_DROP
#include "wx/dnd.h"
-#include "wx/window.h"
-#include "wx/app.h"
-#include "wx/gdicmn.h"
-#include <wx/intl.h>
-#include "gdk/gdkprivate.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 <X11/Xlib.h>
+#include "wx/scopeguard.h"
-// ----------------------------------------------------------------------------
-// global
-// ----------------------------------------------------------------------------
+#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
+// ============================================================================
+
// ----------------------------------------------------------------------------
-// wxDropTarget
+// convert between GTK+ and wxWidgets DND constants
// ----------------------------------------------------------------------------
-wxDropTarget::wxDropTarget()
+static wxDragResult ConvertFromGTK(long action)
{
- m_size = 0;
-}
+ switch ( action )
+ {
+ case GDK_ACTION_COPY:
+ return wxDragCopy;
-wxDropTarget::~wxDropTarget()
-{
+ case GDK_ACTION_LINK:
+ return wxDragLink;
+
+ case GDK_ACTION_MOVE:
+ return wxDragMove;
+ }
+
+ return wxDragNone;
}
-void wxDropTarget::Drop( GdkEventDropDataAvailable *event, int x, int y )
+// ----------------------------------------------------------------------------
+// "drag_leave"
+// ----------------------------------------------------------------------------
+
+extern "C" {
+static void target_drag_leave( GtkWidget *WXUNUSED(widget),
+ GdkDragContext *context,
+ guint WXUNUSED(time),
+ wxDropTarget *drop_target )
{
- printf( "Drop data is of type %s.\n", event->data_type );
-
- OnDrop( x, y, (char *)event->data);
+ /* 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 );
+}
}
-void wxDropTarget::UnregisterWidget( GtkWidget *widget )
+// ----------------------------------------------------------------------------
+// "drag_motion"
+// ----------------------------------------------------------------------------
+
+extern "C" {
+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, (gchar **) NULL, 0, FALSE );
+ /* 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) &&
+ (context->actions & 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;
+}
}
-void wxDropTarget::RegisterWidget( GtkWidget *widget )
+// ----------------------------------------------------------------------------
+// "drag_drop"
+// ----------------------------------------------------------------------------
+
+extern "C" {
+static gboolean target_drag_drop( GtkWidget *widget,
+ GdkDragContext *context,
+ gint x,
+ gint y,
+ guint time,
+ wxDropTarget *drop_target )
{
- wxString formats;
- int valid = 0;
-
- for ( size_t i = 0; i < GetFormatCount(); i++ )
- {
- wxDataFormat df = GetFormat( i );
- switch (df)
+ /* 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)
{
- case wxDF_TEXT:
- if (i > 0) formats += ";";
- formats += "text/plain";
- valid++;
- break;
- case wxDF_FILENAME:
- if (i > 0) formats += ";";
- formats += "file:ALL";
- valid++;
- break;
- default:
- break;
+ // 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;
}
- }
-
- char *str = WXSTRINGCAST formats;
-
- gtk_widget_dnd_drop_set( widget, TRUE, &str, valid, 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;
+}
}
// ----------------------------------------------------------------------------
-// wxTextDropTarget
+// "drag_data_received"
// ----------------------------------------------------------------------------
-bool wxTextDropTarget::OnDrop( long x, long y, const void *pData )
+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 )
{
- OnDropText( x, y, (const char*)pData );
- return TRUE;
+ /* 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(context->action);
+
+ 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
+//----------------------------------------------------------------------------
-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 = NULL;
+ m_dragWidget = NULL;
+ m_dragData = NULL;
+ m_dragTime = 0;
}
-size_t wxTextDropTarget::GetFormatCount() const
+wxDragResult wxDropTarget::OnDragOver( wxCoord WXUNUSED(x),
+ wxCoord WXUNUSED(y),
+ wxDragResult def )
{
- return 1;
+ return def;
}
-wxDataFormat wxTextDropTarget::GetFormat(size_t WXUNUSED(n)) const
+bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
{
- return wxDF_TEXT;
+ return true;
}
-// ----------------------------------------------------------------------------
-// wxFileDropTarget
-// ----------------------------------------------------------------------------
+wxDragResult wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
+ wxDragResult def )
+{
+ return GetData() ? def : wxDragNone;
+}
-bool wxFileDropTarget::OnDropFiles( long x, long y, size_t nFiles, const char * const aszFiles[] )
+wxDragResult wxDropTarget::GTKFigureOutSuggestedAction()
{
- printf( "Got %d dropped files.\n", (int)nFiles );
- printf( "At x: %d, y: %d.\n", (int)x, (int)y );
- for (size_t i = 0; i < nFiles; i++)
- {
- printf( aszFiles[i] );
- printf( "\n" );
- }
- return TRUE;
+ 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))
+ {
+
+ 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;
}
-bool wxFileDropTarget::OnDrop(long x, long y, const void *pData )
+wxDataFormat wxDropTarget::GetMatchingPair()
{
- size_t number = 0;
- char *text = (char*) pData;
- for (int i = 0; i < m_size; i++)
- if (text[i] == 0) number++;
-
- if (number == 0) return TRUE;
-
- char **files = new char*[number];
-
- text = (char*) pData;
- for (size_t i = 0; i < number; i++)
- {
- files[i] = text;
- int len = strlen( text );
- text += len+1;
- }
-
- bool ret = OnDropFiles(x, y, 1, files );
-
- free( files );
-
- return ret;
-}
-
-size_t wxFileDropTarget::GetFormatCount() const
+ return wxDataFormat( GTKGetMatchingPair() );
+}
+
+GdkAtom wxDropTarget::GTKGetMatchingPair(bool quiet)
{
- return 1;
+ if (!m_dataObject)
+ return (GdkAtom) 0;
+
+ if (!m_dragContext)
+ return (GdkAtom) 0;
+
+ GList *child = m_dragContext->targets;
+ 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;
}
-wxDataFormat wxFileDropTarget::GetFormat(size_t WXUNUSED(n)) const
+bool wxDropTarget::GetData()
{
- return wxDF_FILENAME;
+ 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;
}
-//-------------------------------------------------------------------------
-// wxDropSource
-//-------------------------------------------------------------------------
+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);
+}
-//-----------------------------------------------------------------------------
-// drag request
+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;
+ }
-void gtk_drag_callback( GtkWidget *widget, GdkEvent *event, wxDropSource *source )
+ 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( context->action );
+
+ 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 )
{
- printf( "Data requested for dropping.\n" );
-
- wxDataObject *data = source->m_data;
-
- size_t 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 = wxDragCopy;
-}
-
-wxDropSource::wxDropSource( wxWindow *win )
+ 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 )
{
- g_blockEventsOnDrag = TRUE;
-
- m_window = win;
- m_widget = win->m_widget;
- if (win->m_wxwindow) m_widget = win->m_wxwindow;
-
- m_data = (wxDataObject *) NULL;
- m_retValue = wxDragCancel;
+ source->GiveFeedback( ConvertFromGTK(source->m_dragContext->action) );
- m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
- m_goaheadCursor = wxCursor( wxCURSOR_HAND );
+ return 0;
+}
}
-wxDropSource::wxDropSource( wxDataObject &data, wxWindow *win )
+//---------------------------------------------------------------------------
+// wxDropSource
+//---------------------------------------------------------------------------
+
+wxDropSource::wxDropSource(wxWindow *win,
+ const wxIcon &iconCopy,
+ const wxIcon &iconMove,
+ const wxIcon &iconNone)
{
- g_blockEventsOnDrag = TRUE;
-
- m_window = win;
- m_widget = win->m_widget;
- if (win->m_wxwindow) m_widget = win->m_wxwindow;
- m_retValue = wxDragCancel;
-
- m_data = &data;
+ 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;
- m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
- m_goaheadCursor = wxCursor( wxCURSOR_HAND );
+ SetIcons(iconCopy, iconMove, iconNone);
}
-void wxDropSource::SetData( wxDataObject &data )
+wxDropSource::wxDropSource(wxDataObject& data,
+ wxWindow *win,
+ const wxIcon &iconCopy,
+ const wxIcon &iconMove,
+ const wxIcon &iconNone)
{
- m_data = &data;
+ 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);
}
-wxDropSource::~wxDropSource(void)
+void wxDropSource::SetIcons(const wxIcon &iconCopy,
+ const wxIcon &iconMove,
+ const wxIcon &iconNone)
{
-// if (m_data) delete m_data;
+ 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;
+}
- g_blockEventsOnDrag = FALSE;
+wxDropSource::~wxDropSource()
+{
}
-
-wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) )
+
+void wxDropSource::PrepareIcon( int action, GdkDragContext *context )
{
- if (gdk_dnd.dnd_grabbed) return (wxDragResult) wxDragNone;
- if (gdk_dnd.drag_really) return (wxDragResult) wxDragNone;
-
- wxASSERT_MSG( m_data, "wxDragSource: no data" );
-
- if (!m_data) return (wxDragResult) wxDragNone;
- if (m_data->GetDataSize() == 0) return (wxDragResult) wxDragNone;
-
- 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 = (GdkWindow **) 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, (GdkModifierType *) 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)
+ // 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;
+
+ GdkBitmap *mask;
+ if ( icon->GetMask() )
+ mask = icon->GetMask()->GetBitmap();
+ else
+ mask = NULL;
+
+ GdkPixmap *pixmap = icon->GetPixmap();
+
+ gint 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 (m_iconWindow, TRUE);
+
+ gtk_widget_pop_colormap ();
+
+ gtk_widget_set_size_request (m_iconWindow, width, height);
+ gtk_widget_realize (m_iconWindow);
+
+ g_signal_connect (m_iconWindow, "configure_event",
+ G_CALLBACK (gtk_dnd_window_configure_callback), this);
+
+ 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);
+
+ gtk_drag_set_icon_widget( context, m_iconWindow, 0, 0 );
+}
+
+wxDragResult wxDropSource::DoDragDrop(int flags)
{
- if (!m_data) return;
+ wxCHECK_MSG( m_data && m_data->GetFormatCount(), wxDragNone,
+ wxT("Drop source: no data") );
+
+ // still in drag
+ if (g_blockEventsOnDrag)
+ return wxDragNone;
- wxString formats;
-
- wxDataFormat df = m_data->GetPreferredFormat();
-
- switch (df)
+ // 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++)
{
- case wxDF_TEXT:
- formats += "text/plain";
- break;
- case wxDF_FILENAME:
- formats += "file:ALL";
- break;
- default:
- break;
+ 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 );
}
-
- char *str = WXSTRINGCAST formats;
-
- gtk_widget_dnd_drag_set( m_widget, TRUE, &str, 1 );
+ 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;
- gtk_signal_connect( GTK_OBJECT(m_widget), "drag_request_event",
- GTK_SIGNAL_FUNC(gtk_drag_callback), (gpointer)this );
+ 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::UnregisterWindow(void)
+void wxDropSource::GTKConnectDragSignals()
{
- if (!m_widget) return;
-
- gtk_widget_dnd_drag_set( m_widget, FALSE, (gchar **) NULL, 0 );
-
- gtk_signal_disconnect_by_data( GTK_OBJECT(m_widget), (gpointer)this );
+ 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
projects / wxWidgets.git / blobdiff