Initial revision

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/dnd.cpp

@@ -0,0 +1,207 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        dnd.cpp
+// Purpose:     wxDropTarget class
+// Author:      Robert Roebling
+// Copyright:   Robert Roebling
+// Licence:     wxWindows license
+///////////////////////////////////////////////////////////////////////////////
+
+#ifdef __GNUG__
+#pragma implementation "dnd.h"
+#endif
+
+#include "wx/dnd.h"
+#include "wx/window.h"
+#include "wx/app.h"
+#include "wx/gdicmn.h"
+
+#include "gdk/gdkprivate.h"
+
+#include <X11/Xlib.h>
+
+// ----------------------------------------------------------------------------
+// global
+// ----------------------------------------------------------------------------
+
+extern bool g_blockEventsOnDrag;
+
+// ----------------------------------------------------------------------------
+// wxDropTarget
+// ----------------------------------------------------------------------------
+
+wxDropTarget::wxDropTarget()
+{
+};
+
+wxDropTarget::~wxDropTarget()
+{
+};
+
+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);
+};
+
+void wxDropTarget::UnregisterWidget( GtkWidget *widget )
+{
+  gtk_widget_dnd_drop_set( widget, FALSE, NULL, 0, FALSE );
+};
+
+// ----------------------------------------------------------------------------
+// wxTextDropTarget
+// ----------------------------------------------------------------------------
+
+bool wxTextDropTarget::OnDrop( long x, long y, const void *pData )
+{
+  OnDropText( x, y, (const char*)pData );
+  return TRUE;
+};
+
+bool wxTextDropTarget::OnDropText( long x, long y, const char *psz )
+{
+  printf( "Got dropped text: %s.\n", psz );
+  printf( "At x: %d, y: %d.\n", (int)x, (int)y );
+  return TRUE;
+};
+
+void wxTextDropTarget::RegisterWidget( GtkWidget *widget )
+{
+  char *accepted_drop_types[] = { "text/plain" };
+  gtk_widget_dnd_drop_set( widget, TRUE, accepted_drop_types, 1, FALSE );
+};
+
+//-------------------------------------------------------------------------
+// wxDragSource
+//-------------------------------------------------------------------------
+
+//-----------------------------------------------------------------------------
+// drag request
+
+void gtk_drag_callback( GtkWidget *widget, GdkEvent *event, wxDragSource *drag )
+{
+  printf( "OnDragRequest.\n" );
+  
+  gtk_widget_dnd_data_set( widget, event, drag->m_data, drag->m_size );
+};
+
+wxDragSource::wxDragSource( wxWindow *win )
+{
+  g_blockEventsOnDrag = TRUE;
+
+  m_window = win;
+  m_widget = win->m_widget;
+  if (win->m_wxwindow) m_widget = win->m_wxwindow;
+ 
+  m_data = NULL;
+  m_size = 0;
+  
+  m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
+  m_goaheadCursor = wxCursor( wxCURSOR_HAND );
+};
+
+wxDragSource::~wxDragSource(void)
+{
+  g_blockEventsOnDrag = FALSE;
+};
+   
+void wxDragSource::SetData( char *data, const long size )
+{
+  m_size = size;
+  m_data = data;
+};
+
+void wxDragSource::Start( int x, int y )
+{
+  if (gdk_dnd.dnd_grabbed) return;
+  if (gdk_dnd.drag_really) return;
+  if (m_size == 0) return;
+  if (!m_data) return;
+  
+  GdkWindowPrivate *wp = (GdkWindowPrivate*) m_widget->window;
+  
+  RegisterWindow();
+  ConnectWindow();
+  
+  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;
+  gdk_dnd_display_drag_cursor( x, y, FALSE, TRUE );
+  
+  while (gdk_dnd.drag_really || gdk_dnd.drag_perhaps) wxYield();
+  
+  UnconnectWindow();
+  UnregisterWindow();
+};
+
+void wxDragSource::ConnectWindow(void)
+{
+  gtk_signal_connect( GTK_OBJECT(m_widget), "drag_request_event",
+    GTK_SIGNAL_FUNC(gtk_drag_callback), (gpointer)this );
+};
+
+void wxDragSource::UnconnectWindow(void)
+{
+  if (!m_widget) return;
+  
+  gtk_signal_disconnect_by_data( GTK_OBJECT(m_widget), (gpointer)this );
+};
+
+void wxDragSource::UnregisterWindow(void)
+{
+  if (!m_widget) return;
+  
+  gtk_widget_dnd_drag_set( m_widget, FALSE, NULL, 0 );
+};
+  
+//-------------------------------------------------------------------------
+// wxTextDragSource
+//-------------------------------------------------------------------------
+
+void wxTextDragSource::SetTextData( const wxString &text )
+{
+  m_tmp = text;
+  SetData( WXSTRINGCAST(m_tmp), m_tmp.Length()+1 );
+};
+
+void wxTextDragSource::RegisterWindow(void)
+{
+  if (!m_widget) return;
+  
+  char *accepted_drop_types[] = { "text/plain" };
+  gtk_widget_dnd_drag_set( m_widget, TRUE, accepted_drop_types, 1 );
+};
+