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gtk/gdk/directfb/gdkdnd-directfb.c

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team.
*/
/*
* GTK+ DirectFB backend
* Copyright (C) 2001-2002 convergence integrated media GmbH
* Copyright (C) 2002-2004 convergence GmbH
* Written by Denis Oliver Kropp <dok@convergence.de> and
* Sven Neumann <sven@convergence.de>
*/
#include "config.h"
#include "gdk.h"
#include "gdkdirectfb.h"
#include "gdkprivate-directfb.h"
#include "gdkdnd.h"
#include "gdkproperty.h"
typedef struct _GdkDragContextPrivate GdkDragContextPrivate;
typedef enum
{
GDK_DRAG_STATUS_DRAG,
GDK_DRAG_STATUS_MOTION_WAIT,
GDK_DRAG_STATUS_ACTION_WAIT,
GDK_DRAG_STATUS_DROP
} GtkDragStatus;
/* Structure that holds information about a drag in progress.
* this is used on both source and destination sides.
*/
struct _GdkDragContextPrivate
{
GdkAtom local_selection;
guint16 last_x; /* Coordinates from last event */
guint16 last_y;
guint drag_status : 4; /* current status of drag */
};
/* Drag Contexts */
static GList *contexts = NULL;
static GdkDragContext *current_dest_drag = NULL;
#define GDK_DRAG_CONTEXT_PRIVATE_DATA(ctx) ((GdkDragContextPrivate *) GDK_DRAG_CONTEXT (ctx)->windowing_data)
static void gdk_drag_context_finalize (GObject *object);
G_DEFINE_TYPE (GdkDragContext, gdk_drag_context, G_TYPE_OBJECT)
static void
gdk_drag_context_init (GdkDragContext *dragcontext)
{
GdkDragContextPrivate *private;
private = G_TYPE_INSTANCE_GET_PRIVATE (dragcontext,
GDK_TYPE_DRAG_CONTEXT,
GdkDragContextPrivate);
dragcontext->windowing_data = private;
contexts = g_list_prepend (contexts, dragcontext);
}
static void
gdk_drag_context_class_init (GdkDragContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gdk_drag_context_finalize;
g_type_class_add_private (object_class, sizeof (GdkDragContextPrivate));
}
static void
gdk_drag_context_finalize (GObject *object)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (object);
g_list_free (context->targets);
if (context->source_window)
g_object_unref (context->source_window);
if (context->dest_window)
g_object_unref (context->dest_window);
contexts = g_list_remove (contexts, context);
G_OBJECT_CLASS (gdk_drag_context_parent_class)->finalize (object);
}
GdkDragContext *
gdk_drag_context_new (void)
{
return g_object_new (gdk_drag_context_get_type (), NULL);
}
static GdkDragContext *
gdk_drag_context_find (gboolean is_source,
GdkWindow *source,
GdkWindow *dest)
{
GdkDragContext *context;
GdkDragContextPrivate *private;
GList *list;
for (list = contexts; list; list = list->next)
{
context = (GdkDragContext *) list->data;
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (context);
if ((!context->is_source == !is_source) &&
((source == NULL) ||
(context->source_window && (context->source_window == source))) &&
((dest == NULL) ||
(context->dest_window && (context->dest_window == dest))))
return context;
}
return NULL;
}
/************************** Public API ***********************/
void
_gdk_dnd_init (void)
{
}
/* Source side */
static void
local_send_leave (GdkDragContext *context,
guint32 time)
{
GdkEvent event;
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_LOCAL) &&
(current_dest_drag->source_window == context->source_window))
{
event.dnd.type = GDK_DRAG_LEAVE;
event.dnd.window = context->dest_window;
/* Pass ownership of context to the event */
event.dnd.context = current_dest_drag;
event.dnd.send_event = FALSE;
event.dnd.time = time;
current_dest_drag = NULL;
gdk_event_put (&event);
}
}
static void
local_send_enter (GdkDragContext *context,
guint32 time)
{
GdkDragContextPrivate *private;
GdkDragContext *new_context;
GdkEvent event;
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (context);
if (!private->local_selection)
private->local_selection = gdk_atom_intern ("LocalDndSelection", FALSE);
if (current_dest_drag != NULL)
{
g_object_unref (current_dest_drag);
current_dest_drag = NULL;
}
new_context = gdk_drag_context_new ();
new_context->protocol = GDK_DRAG_PROTO_LOCAL;
new_context->is_source = FALSE;
new_context->source_window = g_object_ref (context->source_window);
new_context->dest_window = g_object_ref (context->dest_window);
new_context->targets = g_list_copy (context->targets);
gdk_window_set_events (new_context->source_window,
gdk_window_get_events (new_context->source_window) |
GDK_PROPERTY_CHANGE_MASK);
new_context->actions = context->actions;
event.dnd.type = GDK_DRAG_ENTER;
event.dnd.window = context->dest_window;
event.dnd.send_event = FALSE;
event.dnd.context = new_context;
event.dnd.time = time;
current_dest_drag = new_context;
(GDK_DRAG_CONTEXT_PRIVATE_DATA (new_context))->local_selection =
private->local_selection;
gdk_event_put (&event);
}
static void
local_send_motion (GdkDragContext *context,
gint x_root,
gint y_root,
GdkDragAction action,
guint32 time)
{
GdkEvent event;
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_LOCAL) &&
(current_dest_drag->source_window == context->source_window))
{
event.dnd.type = GDK_DRAG_MOTION;
event.dnd.window = current_dest_drag->dest_window;
event.dnd.send_event = FALSE;
event.dnd.context = current_dest_drag;
event.dnd.time = time;
event.dnd.x_root = x_root;
event.dnd.y_root = y_root;
current_dest_drag->suggested_action = action;
current_dest_drag->actions = action;
(GDK_DRAG_CONTEXT_PRIVATE_DATA (current_dest_drag))->last_x = x_root;
(GDK_DRAG_CONTEXT_PRIVATE_DATA (current_dest_drag))->last_y = y_root;
GDK_DRAG_CONTEXT_PRIVATE_DATA (context)->drag_status = GDK_DRAG_STATUS_MOTION_WAIT;
gdk_event_put (&event);
}
}
static void
local_send_drop (GdkDragContext *context,
guint32 time)
{
GdkEvent event;
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_LOCAL) &&
(current_dest_drag->source_window == context->source_window))
{
GdkDragContextPrivate *private;
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (current_dest_drag);
event.dnd.type = GDK_DROP_START;
event.dnd.window = current_dest_drag->dest_window;
event.dnd.send_event = FALSE;
event.dnd.context = current_dest_drag;
event.dnd.time = time;
event.dnd.x_root = private->last_x;
event.dnd.y_root = private->last_y;
gdk_event_put (&event);
}
}
static void
gdk_drag_do_leave (GdkDragContext *context,
guint32 time)
{
if (context->dest_window)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_LOCAL:
local_send_leave (context, time);
break;
default:
break;
}
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
GdkDragContext *
gdk_drag_begin (GdkWindow *window,
GList *targets)
{
GList *list;
GdkDragContext *new_context;
g_return_val_if_fail (window != NULL, NULL);
g_object_ref (window);
new_context = gdk_drag_context_new ();
new_context->is_source = TRUE;
new_context->source_window = window;
new_context->targets = NULL;
new_context->actions = 0;
for (list = targets; list; list = list->next)
new_context->targets = g_list_append (new_context->targets, list->data);
return new_context;
}
guint32
gdk_drag_get_protocol_for_display(GdkDisplay *display, guint32 xid,
GdkDragProtocol *protocol)
{
GdkWindow *window;
window = gdk_window_lookup ((GdkNativeWindow) xid);
if (window &&
g_object_get_data (G_OBJECT (window), "gdk-dnd-registered") != NULL)
{
*protocol = GDK_DRAG_PROTO_LOCAL;
return xid;
}
*protocol = GDK_DRAG_PROTO_NONE;
return 0;
}
void
gdk_drag_find_window_for_screen (GdkDragContext *context,
GdkWindow *drag_window,
GdkScreen *screen,
gint x_root,
gint y_root,
GdkWindow **dest_window,
GdkDragProtocol *protocol)
{
GdkWindow *dest;
g_return_if_fail (context != NULL);
dest = gdk_window_get_pointer (NULL, &x_root, &y_root, NULL);
if (context->dest_window != dest)
{
guint32 recipient;
/* Check if new destination accepts drags, and which protocol */
if ((recipient = gdk_drag_get_protocol (GDK_WINDOW_DFB_ID (dest),
protocol)))
{
*dest_window = gdk_window_lookup ((GdkNativeWindow) recipient);
if (dest_window)
g_object_ref (*dest_window);
}
else
*dest_window = NULL;
}
else
{
*dest_window = context->dest_window;
if (*dest_window)
g_object_ref (*dest_window);
*protocol = context->protocol;
}
}
gboolean
gdk_drag_motion (GdkDragContext *context,
GdkWindow *dest_window,
GdkDragProtocol protocol,
gint x_root,
gint y_root,
GdkDragAction suggested_action,
GdkDragAction possible_actions,
guint32 time)
{
GdkDragContextPrivate *private;
g_return_val_if_fail (context != NULL, FALSE);
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (context);
if (context->dest_window != dest_window)
{
GdkEvent event;
/* Send a leave to the last destination */
gdk_drag_do_leave (context, time);
private->drag_status = GDK_DRAG_STATUS_DRAG;
/* Check if new destination accepts drags, and which protocol */
if (dest_window)
{
context->dest_window = g_object_ref (dest_window);
context->protocol = protocol;
switch (protocol)
{
case GDK_DRAG_PROTO_LOCAL:
local_send_enter (context, time);
break;
default:
break;
}
context->suggested_action = suggested_action;
}
else
{
context->dest_window = NULL;
context->action = 0;
}
/* Push a status event, to let the client know that
* the drag changed
*/
event.dnd.type = GDK_DRAG_STATUS;
event.dnd.window = context->source_window;
/* We use this to signal a synthetic status. Perhaps
* we should use an extra field...
*/
event.dnd.send_event = TRUE;
event.dnd.context = context;
event.dnd.time = time;
gdk_event_put (&event);
}
else
{
context->suggested_action = suggested_action;
}
/* Send a drag-motion event */
private->last_x = x_root;
private->last_y = y_root;
if (context->dest_window)
{
if (private->drag_status == GDK_DRAG_STATUS_DRAG)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_LOCAL:
local_send_motion (context,
x_root, y_root, suggested_action, time);
break;
case GDK_DRAG_PROTO_NONE:
g_warning ("GDK_DRAG_PROTO_NONE is not valid in gdk_drag_motion()");
break;
default:
break;
}
}
else
return TRUE;
}
return FALSE;
}
void
gdk_drag_drop (GdkDragContext *context,
guint32 time)
{
g_return_if_fail (context != NULL);
if (context->dest_window)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_LOCAL:
local_send_drop (context, time);
break;
case GDK_DRAG_PROTO_NONE:
g_warning ("GDK_DRAG_PROTO_NONE is not valid in gdk_drag_drop()");
break;
default:
break;
}
}
}
void
gdk_drag_abort (GdkDragContext *context,
guint32 time)
{
g_return_if_fail (context != NULL);
gdk_drag_do_leave (context, time);
}
/* Destination side */
void
gdk_drag_status (GdkDragContext *context,
GdkDragAction action,
guint32 time)
{
GdkDragContextPrivate *private;
GdkDragContext *src_context;
GdkEvent event;
g_return_if_fail (context != NULL);
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (context);
src_context = gdk_drag_context_find (TRUE,
context->source_window,
context->dest_window);
if (src_context)
{
GdkDragContextPrivate *private;
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (src_context);
if (private->drag_status == GDK_DRAG_STATUS_MOTION_WAIT)
private->drag_status = GDK_DRAG_STATUS_DRAG;
event.dnd.type = GDK_DRAG_STATUS;
event.dnd.window = src_context->source_window;
event.dnd.send_event = FALSE;
event.dnd.context = src_context;
event.dnd.time = time;
src_context->action = action;
gdk_event_put (&event);
}
}
void
gdk_drop_reply (GdkDragContext *context,
gboolean ok,
guint32 time)
{
g_return_if_fail (context != NULL);
}
void
gdk_drop_finish (GdkDragContext *context,
gboolean success,
guint32 time)
{
GdkDragContextPrivate *private;
GdkDragContext *src_context;
GdkEvent event;
g_return_if_fail (context != NULL);
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (context);
src_context = gdk_drag_context_find (TRUE,
context->source_window,
context->dest_window);
if (src_context)
{
g_object_ref (src_context);
event.dnd.type = GDK_DROP_FINISHED;
event.dnd.window = src_context->source_window;
event.dnd.send_event = FALSE;
event.dnd.context = src_context;
gdk_event_put (&event);
}
}
gboolean
gdk_drag_drop_succeeded (GdkDragContext *context)
{
g_warning("gdk_drag_drop_succeeded unimplemented \n");
return TRUE;
}
void
gdk_window_register_dnd (GdkWindow *window)
{
g_return_if_fail (window != NULL);
if (g_object_get_data (G_OBJECT (window), "gdk-dnd-registered") != NULL)
return;
g_object_set_data (G_OBJECT (window),
"gdk-dnd-registered",
GINT_TO_POINTER (TRUE));
}
/*************************************************************
* gdk_drag_get_selection:
* Returns the selection atom for the current source window
* arguments:
*
* results:
*************************************************************/
GdkAtom
gdk_drag_get_selection (GdkDragContext *context)
{
g_return_val_if_fail (context != NULL, GDK_NONE);
if (context->protocol == GDK_DRAG_PROTO_LOCAL)
return (GDK_DRAG_CONTEXT_PRIVATE_DATA (context))->local_selection;
else
return GDK_NONE;
}
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