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gtk/gdk/x11/gdkdevice-xi2.c

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/* 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gdkx11device-xi2.h"
#include "gdkdeviceprivate.h"
#include "gdkintl.h"
#include "gdkasync.h"
#include "gdkprivate-x11.h"
#include <stdlib.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/extensions/XInput2.h>
#include <math.h>
/* for the use of round() */
#include "fallback-c89.c"
typedef struct _ScrollValuator ScrollValuator;
struct _ScrollValuator
{
guint n_valuator : 4;
guint direction : 4;
guint last_value_valid : 1;
gdouble last_value;
gdouble increment;
};
struct _GdkX11DeviceXI2
{
GdkDevice parent_instance;
gint device_id;
GArray *scroll_valuators;
gdouble *last_axes;
};
struct _GdkX11DeviceXI2Class
{
GdkDeviceClass parent_class;
};
G_DEFINE_TYPE (GdkX11DeviceXI2, gdk_x11_device_xi2, GDK_TYPE_DEVICE)
static void gdk_x11_device_xi2_finalize (GObject *object);
static void gdk_x11_device_xi2_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gdk_x11_device_xi2_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gdk_x11_device_xi2_get_state (GdkDevice *device,
GdkWindow *window,
gdouble *axes,
GdkModifierType *mask);
static void gdk_x11_device_xi2_set_window_cursor (GdkDevice *device,
GdkWindow *window,
GdkCursor *cursor);
static void gdk_x11_device_xi2_warp (GdkDevice *device,
GdkScreen *screen,
gdouble x,
gdouble y);
static void gdk_x11_device_xi2_query_state (GdkDevice *device,
GdkWindow *window,
GdkWindow **root_window,
GdkWindow **child_window,
gdouble *root_x,
gdouble *root_y,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask);
static GdkGrabStatus gdk_x11_device_xi2_grab (GdkDevice *device,
GdkWindow *window,
gboolean owner_events,
GdkEventMask event_mask,
GdkWindow *confine_to,
GdkCursor *cursor,
guint32 time_);
static void gdk_x11_device_xi2_ungrab (GdkDevice *device,
guint32 time_);
static GdkWindow * gdk_x11_device_xi2_window_at_position (GdkDevice *device,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask,
gboolean get_toplevel);
static void gdk_x11_device_xi2_select_window_events (GdkDevice *device,
GdkWindow *window,
GdkEventMask event_mask);
enum {
PROP_0,
PROP_DEVICE_ID
};
static void
gdk_x11_device_xi2_class_init (GdkX11DeviceXI2Class *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkDeviceClass *device_class = GDK_DEVICE_CLASS (klass);
object_class->finalize = gdk_x11_device_xi2_finalize;
object_class->get_property = gdk_x11_device_xi2_get_property;
object_class->set_property = gdk_x11_device_xi2_set_property;
device_class->get_state = gdk_x11_device_xi2_get_state;
device_class->set_window_cursor = gdk_x11_device_xi2_set_window_cursor;
device_class->warp = gdk_x11_device_xi2_warp;
device_class->query_state = gdk_x11_device_xi2_query_state;
device_class->grab = gdk_x11_device_xi2_grab;
device_class->ungrab = gdk_x11_device_xi2_ungrab;
device_class->window_at_position = gdk_x11_device_xi2_window_at_position;
device_class->select_window_events = gdk_x11_device_xi2_select_window_events;
g_object_class_install_property (object_class,
PROP_DEVICE_ID,
g_param_spec_int ("device-id",
P_("Device ID"),
P_("Device identifier"),
0, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
}
static void
gdk_x11_device_xi2_init (GdkX11DeviceXI2 *device)
{
device->scroll_valuators = g_array_new (FALSE, FALSE, sizeof (ScrollValuator));
}
static void
gdk_x11_device_xi2_finalize (GObject *object)
{
GdkX11DeviceXI2 *device = GDK_X11_DEVICE_XI2 (object);
g_array_free (device->scroll_valuators, TRUE);
g_free (device->last_axes);
G_OBJECT_CLASS (gdk_x11_device_xi2_parent_class)->finalize (object);
}
static void
gdk_x11_device_xi2_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (object);
switch (prop_id)
{
case PROP_DEVICE_ID:
g_value_set_int (value, device_xi2->device_id);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_x11_device_xi2_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (object);
switch (prop_id)
{
case PROP_DEVICE_ID:
device_xi2->device_id = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_x11_device_xi2_get_state (GdkDevice *device,
GdkWindow *window,
gdouble *axes,
GdkModifierType *mask)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
if (axes)
{
GdkDisplay *display;
XIDeviceInfo *info;
gint i, j, ndevices;
display = gdk_device_get_display (device);
gdk_x11_display_error_trap_push (display);
info = XIQueryDevice (GDK_DISPLAY_XDISPLAY (display),
device_xi2->device_id, &ndevices);
gdk_x11_display_error_trap_pop_ignored (display);
for (i = 0, j = 0; info && i < info->num_classes; i++)
{
XIAnyClassInfo *class_info = info->classes[i];
GdkAxisUse use;
gdouble value;
if (class_info->type != XIValuatorClass)
continue;
value = ((XIValuatorClassInfo *) class_info)->value;
use = gdk_device_get_axis_use (device, j);
switch (use)
{
case GDK_AXIS_X:
case GDK_AXIS_Y:
case GDK_AXIS_IGNORE:
if (gdk_device_get_mode (device) == GDK_MODE_WINDOW)
_gdk_device_translate_window_coord (device, window, j, value, &axes[j]);
else
{
GdkWindow *root_window;
gint root_x, root_y;
root_window = gdk_screen_get_root_window (gdk_window_get_screen (window));
/* FIXME: Maybe root coords chaching should happen here */
gdk_window_get_origin (window, &root_x, &root_y);
_gdk_device_translate_screen_coord (device, window,
root_x, root_y,
gdk_window_get_width (root_window),
gdk_window_get_height (root_window),
j, value,
&axes[j]);
}
break;
default:
_gdk_device_translate_axis (device, j, value, &axes[j]);
break;
}
j++;
}
if (info)
XIFreeDeviceInfo (info);
}
if (mask)
gdk_x11_device_xi2_query_state (device, window,
NULL, NULL,
NULL, NULL,
NULL, NULL,
mask);
}
static void
gdk_x11_device_xi2_set_window_cursor (GdkDevice *device,
GdkWindow *window,
GdkCursor *cursor)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
/* Non-master devices don't have a cursor */
if (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_MASTER)
return;
if (cursor)
XIDefineCursor (GDK_WINDOW_XDISPLAY (window),
device_xi2->device_id,
GDK_WINDOW_XID (window),
gdk_x11_cursor_get_xcursor (cursor));
else
XIUndefineCursor (GDK_WINDOW_XDISPLAY (window),
device_xi2->device_id,
GDK_WINDOW_XID (window));
}
static void
gdk_x11_device_xi2_warp (GdkDevice *device,
GdkScreen *screen,
gdouble x,
gdouble y)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
Window dest;
dest = GDK_WINDOW_XID (gdk_screen_get_root_window (screen));
XIWarpPointer (GDK_SCREEN_XDISPLAY (screen),
device_xi2->device_id,
None, dest,
0, 0, 0, 0,
round (x * GDK_X11_SCREEN(screen)->window_scale),
round (y * GDK_X11_SCREEN(screen)->window_scale));
}
static void
gdk_x11_device_xi2_query_state (GdkDevice *device,
GdkWindow *window,
GdkWindow **root_window,
GdkWindow **child_window,
gdouble *root_x,
gdouble *root_y,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask)
{
GdkWindowImplX11 *impl = GDK_WINDOW_IMPL_X11 (window->impl);
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
GdkDisplay *display;
GdkScreen *default_screen;
Window xroot_window, xchild_window;
gdouble xroot_x, xroot_y, xwin_x, xwin_y;
XIButtonState button_state;
XIModifierState mod_state;
XIGroupState group_state;
display = gdk_window_get_display (window);
default_screen = gdk_display_get_default_screen (display);
if (gdk_device_get_device_type (device) == GDK_DEVICE_TYPE_SLAVE)
{
GdkDevice *master = gdk_device_get_associated_device (device);
if (master)
_gdk_device_query_state (master, window, root_window, child_window,
root_x, root_y, win_x, win_y, mask);
return;
}
if (!GDK_X11_DISPLAY (display)->trusted_client ||
!XIQueryPointer (GDK_WINDOW_XDISPLAY (window),
device_xi2->device_id,
GDK_WINDOW_XID (window),
&xroot_window,
&xchild_window,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state))
{
XSetWindowAttributes attributes;
Display *xdisplay;
Window xwindow, w;
/* FIXME: untrusted clients not multidevice-safe */
xdisplay = GDK_SCREEN_XDISPLAY (default_screen);
xwindow = GDK_SCREEN_XROOTWIN (default_screen);
w = XCreateWindow (xdisplay, xwindow, 0, 0, 1, 1, 0,
CopyFromParent, InputOnly, CopyFromParent,
0, &attributes);
XIQueryPointer (xdisplay, device_xi2->device_id,
w,
&xroot_window,
&xchild_window,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state);
XDestroyWindow (xdisplay, w);
}
if (root_window)
*root_window = gdk_x11_window_lookup_for_display (display, xroot_window);
if (child_window)
*child_window = gdk_x11_window_lookup_for_display (display, xchild_window);
if (root_x)
*root_x = xroot_x / impl->window_scale;
if (root_y)
*root_y = xroot_y / impl->window_scale;
if (win_x)
*win_x = xwin_x / impl->window_scale;
if (win_y)
*win_y = xwin_y / impl->window_scale;
if (mask)
*mask = _gdk_x11_device_xi2_translate_state (&mod_state, &button_state, &group_state);
free (button_state.mask);
}
static GdkGrabStatus
gdk_x11_device_xi2_grab (GdkDevice *device,
GdkWindow *window,
gboolean owner_events,
GdkEventMask event_mask,
GdkWindow *confine_to,
GdkCursor *cursor,
guint32 time_)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
GdkX11DeviceManagerXI2 *device_manager_xi2;
GdkDisplay *display;
XIEventMask mask;
Window xwindow;
Cursor xcursor;
gint status;
display = gdk_device_get_display (device);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
device_manager_xi2 = GDK_X11_DEVICE_MANAGER_XI2 (gdk_display_get_device_manager (display));
G_GNUC_END_IGNORE_DEPRECATIONS;
/* FIXME: confine_to is actually unused */
xwindow = GDK_WINDOW_XID (window);
if (!cursor)
xcursor = None;
else
{
_gdk_x11_cursor_update_theme (cursor);
xcursor = gdk_x11_cursor_get_xcursor (cursor);
}
mask.deviceid = device_xi2->device_id;
mask.mask = _gdk_x11_device_xi2_translate_event_mask (device_manager_xi2,
event_mask,
&mask.mask_len);
#ifdef G_ENABLE_DEBUG
if (GDK_DEBUG_CHECK (NOGRABS))
status = GrabSuccess;
else
#endif
status = XIGrabDevice (GDK_DISPLAY_XDISPLAY (display),
device_xi2->device_id,
xwindow,
time_,
xcursor,
GrabModeAsync, GrabModeAsync,
owner_events,
&mask);
g_free (mask.mask);
_gdk_x11_display_update_grab_info (display, device, status);
return _gdk_x11_convert_grab_status (status);
}
static void
gdk_x11_device_xi2_ungrab (GdkDevice *device,
guint32 time_)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
GdkDisplay *display;
gulong serial;
display = gdk_device_get_display (device);
serial = NextRequest (GDK_DISPLAY_XDISPLAY (display));
XIUngrabDevice (GDK_DISPLAY_XDISPLAY (display), device_xi2->device_id, time_);
_gdk_x11_display_update_grab_info_ungrab (display, device, time_, serial);
}
static GdkWindow *
gdk_x11_device_xi2_window_at_position (GdkDevice *device,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask,
gboolean get_toplevel)
{
GdkWindowImplX11 *impl;
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
GdkDisplay *display;
GdkScreen *screen;
Display *xdisplay;
GdkWindow *window;
Window xwindow, root, child, last = None;
gdouble xroot_x, xroot_y, xwin_x, xwin_y;
XIButtonState button_state = { 0 };
XIModifierState mod_state;
XIGroupState group_state;
Bool retval;
display = gdk_device_get_display (device);
screen = gdk_display_get_default_screen (display);
gdk_x11_display_error_trap_push (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);
if (G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
{
XIQueryPointer (xdisplay,
device_xi2->device_id,
xwindow,
&root, &child,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state);
if (root == xwindow)
xwindow = child;
else
xwindow = root;
}
else
{
gint width, height;
GList *toplevels, *list;
Window pointer_window;
/* FIXME: untrusted clients case not multidevice-safe */
pointer_window = None;
screen = gdk_display_get_default_screen (display);
toplevels = gdk_screen_get_toplevel_windows (screen);
for (list = toplevels; list != NULL; list = list->next)
{
window = GDK_WINDOW (list->data);
xwindow = GDK_WINDOW_XID (window);
/* Free previous button mask, if any */
g_free (button_state.mask);
retval = XIQueryPointer (xdisplay,
device_xi2->device_id,
xwindow,
&root, &child,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state);
if (!retval)
continue;
if (child != None)
{
pointer_window = child;
break;
}
gdk_window_get_geometry (window, NULL, NULL, &width, &height);
if (xwin_x >= 0 && xwin_y >= 0 && xwin_x < width && xwin_y < height)
{
/* A childless toplevel, or below another window? */
XSetWindowAttributes attributes;
Window w;
free (button_state.mask);
w = XCreateWindow (xdisplay, xwindow, (int)xwin_x, (int)xwin_y, 1, 1, 0,
CopyFromParent, InputOnly, CopyFromParent,
0, &attributes);
XMapWindow (xdisplay, w);
XIQueryPointer (xdisplay,
device_xi2->device_id,
xwindow,
&root, &child,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state);
XDestroyWindow (xdisplay, w);
if (child == w)
{
pointer_window = xwindow;
break;
}
}
g_list_free (toplevels);
if (pointer_window != None)
break;
}
xwindow = pointer_window;
}
while (xwindow)
{
last = xwindow;
free (button_state.mask);
retval = XIQueryPointer (xdisplay,
device_xi2->device_id,
xwindow,
&root, &xwindow,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state);
if (!retval)
break;
if (get_toplevel && last != root &&
(window = gdk_x11_window_lookup_for_display (display, last)) != NULL &&
GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN)
{
xwindow = last;
break;
}
}
gdk_x11_display_ungrab (display);
if (gdk_x11_display_error_trap_pop (display) == 0)
{
window = gdk_x11_window_lookup_for_display (display, last);
impl = NULL;
if (window)
impl = GDK_WINDOW_IMPL_X11 (window->impl);
if (mask)
*mask = _gdk_x11_device_xi2_translate_state (&mod_state, &button_state, &group_state);
free (button_state.mask);
}
else
{
window = NULL;
if (mask)
*mask = 0;
}
if (win_x)
*win_x = (window) ? (xwin_x / impl->window_scale) : -1;
if (win_y)
*win_y = (window) ? (xwin_y / impl->window_scale) : -1;
return window;
}
static void
gdk_x11_device_xi2_select_window_events (GdkDevice *device,
GdkWindow *window,
GdkEventMask event_mask)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
GdkX11DeviceManagerXI2 *device_manager_xi2;
GdkDisplay *display;
XIEventMask evmask;
display = gdk_device_get_display (device);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
device_manager_xi2 = GDK_X11_DEVICE_MANAGER_XI2 (gdk_display_get_device_manager (display));
G_GNUC_END_IGNORE_DEPRECATIONS;
evmask.deviceid = device_xi2->device_id;
evmask.mask = _gdk_x11_device_xi2_translate_event_mask (device_manager_xi2,
event_mask,
&evmask.mask_len);
XISelectEvents (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
&evmask, 1);
g_free (evmask.mask);
}
guchar *
_gdk_x11_device_xi2_translate_event_mask (GdkX11DeviceManagerXI2 *device_manager_xi2,
GdkEventMask event_mask,
gint *len)
{
guchar *mask;
gint minor;
g_object_get (device_manager_xi2, "minor", &minor, NULL);
*len = XIMaskLen (XI_LASTEVENT);
mask = g_new0 (guchar, *len);
if (event_mask & GDK_POINTER_MOTION_MASK ||
event_mask & GDK_POINTER_MOTION_HINT_MASK)
XISetMask (mask, XI_Motion);
if (event_mask & GDK_BUTTON_MOTION_MASK ||
event_mask & GDK_BUTTON1_MOTION_MASK ||
event_mask & GDK_BUTTON2_MOTION_MASK ||
event_mask & GDK_BUTTON3_MOTION_MASK)
{
XISetMask (mask, XI_ButtonPress);
XISetMask (mask, XI_ButtonRelease);
XISetMask (mask, XI_Motion);
}
if (event_mask & GDK_SCROLL_MASK)
{
XISetMask (mask, XI_ButtonPress);
XISetMask (mask, XI_ButtonRelease);
}
if (event_mask & GDK_BUTTON_PRESS_MASK)
XISetMask (mask, XI_ButtonPress);
if (event_mask & GDK_BUTTON_RELEASE_MASK)
XISetMask (mask, XI_ButtonRelease);
if (event_mask & GDK_KEY_PRESS_MASK)
XISetMask (mask, XI_KeyPress);
if (event_mask & GDK_KEY_RELEASE_MASK)
XISetMask (mask, XI_KeyRelease);
if (event_mask & GDK_ENTER_NOTIFY_MASK)
XISetMask (mask, XI_Enter);
if (event_mask & GDK_LEAVE_NOTIFY_MASK)
XISetMask (mask, XI_Leave);
if (event_mask & GDK_FOCUS_CHANGE_MASK)
{
XISetMask (mask, XI_FocusIn);
XISetMask (mask, XI_FocusOut);
}
#ifdef XINPUT_2_2
/* XInput 2.2 includes multitouch support */
if (minor >= 2 &&
event_mask & GDK_TOUCH_MASK)
{
XISetMask (mask, XI_TouchBegin);
XISetMask (mask, XI_TouchUpdate);
XISetMask (mask, XI_TouchEnd);
}
#endif /* XINPUT_2_2 */
return mask;
}
guint
_gdk_x11_device_xi2_translate_state (XIModifierState *mods_state,
XIButtonState *buttons_state,
XIGroupState *group_state)
{
guint state = 0;
if (mods_state)
state = mods_state->effective;
if (buttons_state)
{
gint len, i;
/* We're only interested in the first 3 buttons */
len = MIN (3, buttons_state->mask_len * 8);
for (i = 1; i <= len; i++)
{
if (!XIMaskIsSet (buttons_state->mask, i))
continue;
switch (i)
{
case 1:
state |= GDK_BUTTON1_MASK;
break;
case 2:
state |= GDK_BUTTON2_MASK;
break;
case 3:
state |= GDK_BUTTON3_MASK;
break;
default:
break;
}
}
}
if (group_state)
state |= (group_state->effective) << 13;
return state;
}
void
_gdk_x11_device_xi2_add_scroll_valuator (GdkX11DeviceXI2 *device,
guint n_valuator,
GdkScrollDirection direction,
gdouble increment)
{
ScrollValuator scroll;
g_return_if_fail (GDK_IS_X11_DEVICE_XI2 (device));
g_return_if_fail (n_valuator < gdk_device_get_n_axes (GDK_DEVICE (device)));
scroll.n_valuator = n_valuator;
scroll.direction = direction;
scroll.last_value_valid = FALSE;
scroll.increment = increment;
g_array_append_val (device->scroll_valuators, scroll);
}
gboolean
_gdk_x11_device_xi2_get_scroll_delta (GdkX11DeviceXI2 *device,
guint n_valuator,
gdouble valuator_value,
GdkScrollDirection *direction_ret,
gdouble *delta_ret)
{
guint i;
g_return_val_if_fail (GDK_IS_X11_DEVICE_XI2 (device), FALSE);
g_return_val_if_fail (n_valuator < gdk_device_get_n_axes (GDK_DEVICE (device)), FALSE);
for (i = 0; i < device->scroll_valuators->len; i++)
{
ScrollValuator *scroll;
scroll = &g_array_index (device->scroll_valuators, ScrollValuator, i);
if (scroll->n_valuator == n_valuator)
{
if (direction_ret)
*direction_ret = scroll->direction;
if (delta_ret)
*delta_ret = 0;
if (scroll->last_value_valid)
{
if (delta_ret)
*delta_ret = (valuator_value - scroll->last_value) / scroll->increment;
scroll->last_value = valuator_value;
}
else
{
scroll->last_value = valuator_value;
scroll->last_value_valid = TRUE;
}
return TRUE;
}
}
return FALSE;
}
void
_gdk_device_xi2_reset_scroll_valuators (GdkX11DeviceXI2 *device)
{
guint i;
for (i = 0; i < device->scroll_valuators->len; i++)
{
ScrollValuator *scroll;
scroll = &g_array_index (device->scroll_valuators, ScrollValuator, i);
scroll->last_value_valid = FALSE;
}
}
void
_gdk_device_xi2_unset_scroll_valuators (GdkX11DeviceXI2 *device)
{
if (device->scroll_valuators->len > 0)
g_array_remove_range (device->scroll_valuators, 0,
device->scroll_valuators->len);
}
gint
_gdk_x11_device_xi2_get_id (GdkX11DeviceXI2 *device)
{
g_return_val_if_fail (GDK_IS_X11_DEVICE_XI2 (device), 0);
return device->device_id;
}
gdouble
gdk_x11_device_xi2_get_last_axis_value (GdkX11DeviceXI2 *device,
gint n_axis)
{
if (n_axis >= gdk_device_get_n_axes (GDK_DEVICE (device)))
return 0;
if (!device->last_axes)
return 0;
return device->last_axes[n_axis];
}
void
gdk_x11_device_xi2_store_axes (GdkX11DeviceXI2 *device,
gdouble *axes,
gint n_axes)
{
g_free (device->last_axes);
if (axes && n_axes)
device->last_axes = g_memdup (axes, sizeof (gdouble) * n_axes);
else
device->last_axes = NULL;
}
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