gtk2/gdk/x11/gdkdevice-core.c

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2010-05-25 22:38:44 +00:00
/* GDK - The GIMP Drawing Kit
* Copyright (C) 2009 Carlos Garnacho <carlosg@gnome.org>
*
* 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.
*/
#include "config.h"
#include <gdk/gdkwindow.h>
#include "gdkdevice-core.h"
#include "gdkprivate-x11.h"
#include "gdkx.h"
static gboolean gdk_device_core_get_history (GdkDevice *device,
GdkWindow *window,
guint32 start,
guint32 stop,
GdkTimeCoord ***events,
guint *n_events);
static void gdk_device_core_get_state (GdkDevice *device,
GdkWindow *window,
gdouble *axes,
GdkModifierType *mask);
static void gdk_device_core_set_window_cursor (GdkDevice *device,
GdkWindow *window,
GdkCursor *cursor);
static void gdk_device_core_warp (GdkDevice *device,
GdkScreen *screen,
gint x,
gint y);
static gboolean gdk_device_core_query_state (GdkDevice *device,
GdkWindow *window,
GdkWindow **root_window,
GdkWindow **child_window,
gint *root_x,
gint *root_y,
gint *win_x,
gint *win_y,
GdkModifierType *mask);
static GdkGrabStatus gdk_device_core_grab (GdkDevice *device,
GdkWindow *window,
gboolean owner_events,
GdkEventMask event_mask,
GdkWindow *confine_to,
GdkCursor *cursor,
guint32 time_);
static void gdk_device_core_ungrab (GdkDevice *device,
guint32 time_);
static GdkWindow * gdk_device_core_window_at_position (GdkDevice *device,
gint *win_x,
gint *win_y,
GdkModifierType *mask,
gboolean get_toplevel);
static void gdk_device_core_select_window_events (GdkDevice *device,
GdkWindow *window,
GdkEventMask event_mask);
G_DEFINE_TYPE (GdkDeviceCore, gdk_device_core, GDK_TYPE_DEVICE)
static void
gdk_device_core_class_init (GdkDeviceCoreClass *klass)
{
GdkDeviceClass *device_class = GDK_DEVICE_CLASS (klass);
device_class->get_history = gdk_device_core_get_history;
device_class->get_state = gdk_device_core_get_state;
device_class->set_window_cursor = gdk_device_core_set_window_cursor;
device_class->warp = gdk_device_core_warp;
device_class->query_state = gdk_device_core_query_state;
device_class->grab = gdk_device_core_grab;
device_class->ungrab = gdk_device_core_ungrab;
device_class->window_at_position = gdk_device_core_window_at_position;
device_class->select_window_events = gdk_device_core_select_window_events;
}
static void
gdk_device_core_init (GdkDeviceCore *device_core)
{
GdkDevice *device;
device = GDK_DEVICE (device_core);
_gdk_device_add_axis (device, GDK_NONE, GDK_AXIS_X, 0, 0, 1);
_gdk_device_add_axis (device, GDK_NONE, GDK_AXIS_Y, 0, 0, 1);
}
static gboolean
impl_coord_in_window (GdkWindow *window,
int impl_x,
int impl_y)
{
GdkWindowObject *priv = (GdkWindowObject *) window;
if (impl_x < priv->abs_x ||
impl_x > priv->abs_x + priv->width)
return FALSE;
if (impl_y < priv->abs_y ||
impl_y > priv->abs_y + priv->height)
return FALSE;
return TRUE;
}
static gboolean
gdk_device_core_get_history (GdkDevice *device,
GdkWindow *window,
guint32 start,
guint32 stop,
GdkTimeCoord ***events,
guint *n_events)
{
GdkWindowObject *priv;
XTimeCoord *xcoords;
GdkTimeCoord **coords;
GdkWindow *impl_window;
int tmp_n_events;
int i, j;
impl_window = _gdk_window_get_impl_window (window);
xcoords = XGetMotionEvents (GDK_DRAWABLE_XDISPLAY (window),
GDK_DRAWABLE_XID (impl_window),
start, stop, &tmp_n_events);
if (!xcoords)
return FALSE;
priv = (GdkWindowObject *) window;
coords = _gdk_device_allocate_history (device, tmp_n_events);
for (i = 0, j = 0; i < tmp_n_events; i++)
{
if (impl_coord_in_window (window, xcoords[i].x, xcoords[i].y))
{
coords[j]->time = xcoords[i].time;
coords[j]->axes[0] = xcoords[i].x - priv->abs_x;
coords[j]->axes[1] = xcoords[i].y - priv->abs_y;
j++;
}
}
XFree (xcoords);
/* free the events we allocated too much */
for (i = j; i < tmp_n_events; i++)
{
g_free (coords[i]);
coords[i] = NULL;
}
tmp_n_events = j;
if (tmp_n_events == 0)
{
gdk_device_free_history (coords, tmp_n_events);
return FALSE;
}
if (n_events)
*n_events = tmp_n_events;
if (events)
*events = coords;
else if (coords)
gdk_device_free_history (coords, tmp_n_events);
return TRUE;
}
static void
gdk_device_core_get_state (GdkDevice *device,
GdkWindow *window,
gdouble *axes,
GdkModifierType *mask)
{
gint x_int, y_int;
gdk_window_get_pointer (window, &x_int, &y_int, mask);
if (axes)
{
axes[0] = x_int;
axes[1] = y_int;
}
}
static void
gdk_device_core_set_window_cursor (GdkDevice *device,
GdkWindow *window,
GdkCursor *cursor)
{
GdkCursorPrivate *cursor_private;
Cursor xcursor;
cursor_private = (GdkCursorPrivate*) cursor;
if (!cursor)
xcursor = None;
else
xcursor = cursor_private->xcursor;
XDefineCursor (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
xcursor);
}
static void
gdk_device_core_warp (GdkDevice *device,
GdkScreen *screen,
gint x,
gint y)
{
Display *xdisplay;
Window dest;
xdisplay = GDK_DISPLAY_XDISPLAY (gdk_device_get_display (device));
dest = GDK_WINDOW_XWINDOW (gdk_screen_get_root_window (screen));
XWarpPointer (xdisplay, None, dest, 0, 0, 0, 0, x, y);
}
static gboolean
gdk_device_core_query_state (GdkDevice *device,
GdkWindow *window,
GdkWindow **root_window,
GdkWindow **child_window,
gint *root_x,
gint *root_y,
gint *win_x,
gint *win_y,
GdkModifierType *mask)
{
GdkDisplay *display;
Window xroot_window, xchild_window;
int xroot_x, xroot_y, xwin_x, xwin_y;
unsigned int xmask;
display = gdk_drawable_get_display (window);
if (!XQueryPointer (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
&xroot_window,
&xchild_window,
&xroot_x,
&xroot_y,
&xwin_x,
&xwin_y,
&xmask))
{
return FALSE;
}
if (root_window)
*root_window = gdk_window_lookup_for_display (display, xroot_window);
if (child_window)
*child_window = gdk_window_lookup_for_display (display, xchild_window);
if (root_x)
*root_x = xroot_x;
if (root_y)
*root_y = xroot_y;
if (win_x)
*win_x = xwin_x;
if (win_y)
*win_y = xwin_y;
if (mask)
*mask = xmask;
return TRUE;
}
static GdkGrabStatus
gdk_device_core_grab (GdkDevice *device,
GdkWindow *window,
gboolean owner_events,
GdkEventMask event_mask,
GdkWindow *confine_to,
GdkCursor *cursor,
guint32 time_)
{
GdkDisplay *display;
Window xwindow, xconfine_to;
int status;
display = gdk_device_get_display (device);
xwindow = GDK_WINDOW_XID (window);
if (confine_to)
confine_to = _gdk_window_get_impl_window (confine_to);
if (!confine_to || GDK_WINDOW_DESTROYED (confine_to))
xconfine_to = None;
else
xconfine_to = GDK_WINDOW_XID (confine_to);
if (device->source == GDK_SOURCE_KEYBOARD)
{
/* Device is a keyboard */
status = XGrabKeyboard (GDK_DISPLAY_XDISPLAY (display),
xwindow,
owner_events,
GrabModeAsync, GrabModeAsync,
time_);
}
else
{
Cursor xcursor;
guint xevent_mask;
gint i;
/* Device is a pointer */
if (!cursor)
xcursor = None;
else
{
_gdk_x11_cursor_update_theme (cursor);
xcursor = ((GdkCursorPrivate *) cursor)->xcursor;
}
xevent_mask = 0;
for (i = 0; i < _gdk_nenvent_masks; i++)
{
if (event_mask & (1 << (i + 1)))
xevent_mask |= _gdk_event_mask_table[i];
}
/* We don't want to set a native motion hint mask, as we're emulating motion
* hints. If we set a native one we just wouldn't get any events.
*/
xevent_mask &= ~PointerMotionHintMask;
status = XGrabPointer (GDK_DISPLAY_XDISPLAY (display),
xwindow,
owner_events,
xevent_mask,
GrabModeAsync, GrabModeAsync,
xconfine_to,
xcursor,
time_);
}
return _gdk_x11_convert_grab_status (status);
}
static void
gdk_device_core_ungrab (GdkDevice *device,
guint32 time_)
{
GdkDisplay *display;
display = gdk_device_get_display (device);
if (device->source == GDK_SOURCE_KEYBOARD)
XUngrabKeyboard (GDK_DISPLAY_XDISPLAY (display), time_);
else
XUngrabPointer (GDK_DISPLAY_XDISPLAY (display), time_);
}
static GdkWindow *
gdk_device_core_window_at_position (GdkDevice *device,
gint *win_x,
gint *win_y,
GdkModifierType *mask,
gboolean get_toplevel)
{
GdkDisplay *display;
GdkScreen *screen;
Display *xdisplay;
GdkWindow *window;
Window xwindow, root, child, last;
int xroot_x, xroot_y, xwin_x, xwin_y;
unsigned int xmask;
last = None;
display = gdk_device_get_display (device);
screen = gdk_display_get_default_screen (display);
/* This function really only works if the mouse pointer is held still
* during its operation. If it moves from one leaf window to another
* than we'll end up with inaccurate values for win_x, win_y
* and the result.
*/
gdk_x11_display_grab (display);
xdisplay = GDK_SCREEN_XDISPLAY (screen);
xwindow = GDK_SCREEN_XROOTWIN (screen);
XQueryPointer (xdisplay, xwindow,
&root, &child,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&xmask);
if (root == xwindow)
xwindow = child;
else
xwindow = root;
while (xwindow)
{
last = xwindow;
XQueryPointer (xdisplay, xwindow,
&root, &xwindow,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&xmask);
if (get_toplevel && last != root &&
(window = gdk_window_lookup_for_display (display, last)) != NULL &&
GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN)
{
xwindow = last;
break;
}
}
gdk_x11_display_ungrab (display);
window = gdk_window_lookup_for_display (display, last);
if (win_x)
*win_x = (window) ? xwin_x : -1;
if (win_y)
*win_y = (window) ? xwin_y : -1;
if (mask)
*mask = xmask;
return window;
}
static void
gdk_device_core_select_window_events (GdkDevice *device,
GdkWindow *window,
GdkEventMask event_mask)
{
GdkEventMask filter_mask, window_mask;
guint xmask = 0;
gint i;
window_mask = gdk_window_get_events (window);
filter_mask = (GDK_POINTER_MOTION_MASK &
GDK_POINTER_MOTION_HINT_MASK &
GDK_BUTTON_MOTION_MASK &
GDK_BUTTON1_MOTION_MASK &
GDK_BUTTON2_MOTION_MASK &
GDK_BUTTON3_MOTION_MASK &
GDK_BUTTON_PRESS_MASK &
GDK_BUTTON_RELEASE_MASK &
GDK_KEY_PRESS_MASK &
GDK_KEY_RELEASE_MASK &
GDK_ENTER_NOTIFY_MASK &
GDK_LEAVE_NOTIFY_MASK &
GDK_FOCUS_CHANGE_MASK &
GDK_PROXIMITY_IN_MASK &
GDK_PROXIMITY_OUT_MASK &
GDK_SCROLL_MASK);
/* Filter out non-device events */
event_mask &= filter_mask;
/* Unset device events on window mask */
window_mask &= ~(filter_mask);
/* Combine masks */
event_mask |= window_mask;
for (i = 0; i < _gdk_nenvent_masks; i++)
{
if (event_mask & (1 << (i + 1)))
xmask |= _gdk_event_mask_table[i];
}
if (GDK_WINDOW_XID (window) != GDK_WINDOW_XROOTWIN (window))
xmask |= StructureNotifyMask | PropertyChangeMask;
XSelectInput (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XWINDOW (window),
xmask);
}