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gtk/gdk/x11/gdkinput-x11.c
Matthias Clasen 321428fee7 Adjust the handling of min values for the x and y axes of extended input 
2006-03-04  Matthias Clasen  <mclasen@redhat.com>

	* gdk/x11/gdkinput-x11 (gdk_input_translate_coordinates):
	Adjust the handling of min values for the x and y axes of
	extended input devices  (#324562, #142536, Denis Auroux and
	Robert Ögren)
2006-03-04 05:26:29 +00:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 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. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <config.h>
#include "gdkinputprivate.h"
#include "gdkinternals.h"
#include "gdkx.h"
#include "gdk.h" /* For gdk_error_trap_push()/pop() */
#include "gdkdisplay-x11.h"
#include "gdkalias.h"
#include <string.h>
/* Forward declarations */
static GdkDevicePrivate *gdk_input_device_new (GdkDisplay *display,
XDeviceInfo *device,
gint include_core);
static void gdk_input_translate_coordinates (GdkDevicePrivate *gdkdev,
GdkInputWindow *input_window,
gint *axis_data,
gdouble *axis_out,
gdouble *x_out,
gdouble *y_out);
static guint gdk_input_translate_state (guint state,
guint device_state);
GdkDevicePrivate *
_gdk_input_find_device (GdkDisplay *display,
guint32 id)
{
GList *tmp_list = GDK_DISPLAY_X11 (display)->input_devices;
GdkDevicePrivate *gdkdev;
while (tmp_list)
{
gdkdev = (GdkDevicePrivate *)(tmp_list->data);
if (gdkdev->deviceid == id)
return gdkdev;
tmp_list = tmp_list->next;
}
return NULL;
}
void
_gdk_input_get_root_relative_geometry(Display *display, Window w, int *x_ret, int *y_ret,
int *width_ret, int *height_ret)
{
Window root, parent, child;
Window *children;
guint nchildren;
gint x,y;
guint width, height;
guint border_widthc, depthc;
XQueryTree (display, w, &root, &parent, &children, &nchildren);
if (children)
XFree(children);
XGetGeometry (display, w, &root, &x, &y, &width, &height, &border_widthc, &depthc);
XTranslateCoordinates (display, w, root, 0, 0, &x, &y, &child);
if (x_ret)
*x_ret = x;
if (y_ret)
*y_ret = y;
if (width_ret)
*width_ret = width;
if (height_ret)
*height_ret = height;
}
static GdkDevicePrivate *
gdk_input_device_new (GdkDisplay *display,
XDeviceInfo *device,
gint include_core)
{
GdkDevicePrivate *gdkdev;
gchar *tmp_name;
XAnyClassPtr class;
gint i,j;
gdkdev = g_object_new (GDK_TYPE_DEVICE, NULL);
gdkdev->deviceid = device->id;
gdkdev->display = display;
if (device->name[0])
gdkdev->info.name = g_strdup (device->name);
else
/* XFree86 3.2 gives an empty name to the default core devices,
(fixed in 3.2A) */
gdkdev->info.name = g_strdup ("pointer");
gdkdev->info.mode = GDK_MODE_DISABLED;
/* Try to figure out what kind of device this is by its name -
could invite a very, very, long list... Lowercase name
for comparison purposes */
tmp_name = g_ascii_strdown (gdkdev->info.name, -1);
if (!strcmp (tmp_name, "pointer"))
gdkdev->info.source = GDK_SOURCE_MOUSE;
else if (!strcmp (tmp_name, "wacom") ||
!strcmp (tmp_name, "pen"))
gdkdev->info.source = GDK_SOURCE_PEN;
else if (!strcmp (tmp_name, "eraser"))
gdkdev->info.source = GDK_SOURCE_ERASER;
else if (!strcmp (tmp_name, "cursor"))
gdkdev->info.source = GDK_SOURCE_CURSOR;
else
gdkdev->info.source = GDK_SOURCE_PEN;
g_free(tmp_name);
gdkdev->xdevice = NULL;
/* step through the classes */
gdkdev->info.num_axes = 0;
gdkdev->info.num_keys = 0;
gdkdev->info.axes = NULL;
gdkdev->info.keys = NULL;
gdkdev->axes = 0;
gdkdev->info.has_cursor = 0;
gdkdev->needs_update = FALSE;
gdkdev->claimed = FALSE;
gdkdev->button_state = 0;
class = device->inputclassinfo;
for (i=0;i<device->num_classes;i++)
{
switch (class->class) {
case ButtonClass:
break;
case KeyClass:
{
XKeyInfo *xki = (XKeyInfo *)class;
/* Hack to catch XFree86 3.3.1 bug. Other devices better
* not have exactly 25 keys...
*/
if ((xki->min_keycode == 8) && (xki->max_keycode == 32))
{
gdkdev->info.num_keys = 32;
gdkdev->min_keycode = 1;
}
else
{
gdkdev->info.num_keys = xki->max_keycode - xki->min_keycode + 1;
gdkdev->min_keycode = xki->min_keycode;
}
gdkdev->info.keys = g_new (GdkDeviceKey, gdkdev->info.num_keys);
for (j=0; j<gdkdev->info.num_keys; j++)
{
gdkdev->info.keys[j].keyval = 0;
gdkdev->info.keys[j].modifiers = 0;
}
break;
}
case ValuatorClass:
{
XValuatorInfo *xvi = (XValuatorInfo *)class;
gdkdev->info.num_axes = xvi->num_axes;
gdkdev->axes = g_new (GdkAxisInfo, xvi->num_axes);
gdkdev->info.axes = g_new0 (GdkDeviceAxis, xvi->num_axes);
for (j=0;j<xvi->num_axes;j++)
{
gdkdev->axes[j].resolution =
gdkdev->axes[j].xresolution = xvi->axes[j].resolution;
gdkdev->axes[j].min_value =
gdkdev->axes[j].xmin_value = xvi->axes[j].min_value;
gdkdev->axes[j].max_value =
gdkdev->axes[j].xmax_value = xvi->axes[j].max_value;
gdkdev->info.axes[j].use = GDK_AXIS_IGNORE;
}
j=0;
if (j<xvi->num_axes)
gdk_device_set_axis_use (&gdkdev->info, j++, GDK_AXIS_X);
if (j<xvi->num_axes)
gdk_device_set_axis_use (&gdkdev->info, j++, GDK_AXIS_Y);
if (j<xvi->num_axes)
gdk_device_set_axis_use (&gdkdev->info, j++, GDK_AXIS_PRESSURE);
if (j<xvi->num_axes)
gdk_device_set_axis_use (&gdkdev->info, j++, GDK_AXIS_XTILT);
if (j<xvi->num_axes)
gdk_device_set_axis_use (&gdkdev->info, j++, GDK_AXIS_YTILT);
if (j<xvi->num_axes)
gdk_device_set_axis_use (&gdkdev->info, j++, GDK_AXIS_WHEEL);
break;
}
}
class = (XAnyClassPtr)(((char *)class) + class->length);
}
/* return NULL if no axes */
if (!gdkdev->info.num_axes || !gdkdev->axes ||
(!include_core && device->use == IsXPointer))
goto error;
if (device->use != IsXPointer)
{
gdk_error_trap_push ();
gdkdev->xdevice = XOpenDevice (GDK_DISPLAY_XDISPLAY (display),
gdkdev->deviceid);
/* return NULL if device is not ready */
if (gdk_error_trap_pop ())
goto error;
}
gdkdev->buttonpress_type = 0;
gdkdev->buttonrelease_type = 0;
gdkdev->keypress_type = 0;
gdkdev->keyrelease_type = 0;
gdkdev->motionnotify_type = 0;
gdkdev->proximityin_type = 0;
gdkdev->proximityout_type = 0;
gdkdev->changenotify_type = 0;
return gdkdev;
error:
g_free (gdkdev->info.name);
if (gdkdev->axes)
g_free (gdkdev->axes);
if (gdkdev->info.keys)
g_free (gdkdev->info.keys);
if (gdkdev->info.axes)
g_free (gdkdev->info.axes);
g_object_unref (gdkdev);
return NULL;
}
void
_gdk_input_common_find_events(GdkWindow *window,
GdkDevicePrivate *gdkdev,
gint mask,
XEventClass *classes,
int *num_classes)
{
gint i;
XEventClass class;
i = 0;
if (mask & GDK_BUTTON_PRESS_MASK)
{
DeviceButtonPress (gdkdev->xdevice, gdkdev->buttonpress_type,
class);
if (class != 0)
classes[i++] = class;
DeviceButtonPressGrab (gdkdev->xdevice, 0, class);
if (class != 0)
classes[i++] = class;
}
if (mask & GDK_BUTTON_RELEASE_MASK)
{
DeviceButtonRelease (gdkdev->xdevice, gdkdev->buttonrelease_type,
class);
if (class != 0)
classes[i++] = class;
}
if (mask & GDK_POINTER_MOTION_MASK)
{
DeviceMotionNotify (gdkdev->xdevice, gdkdev->motionnotify_type, class);
if (class != 0)
classes[i++] = class;
}
else
if (mask & (GDK_BUTTON1_MOTION_MASK | GDK_BUTTON2_MOTION_MASK |
GDK_BUTTON3_MOTION_MASK | GDK_BUTTON_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK))
{
/* Make sure gdkdev->motionnotify_type is set */
DeviceMotionNotify (gdkdev->xdevice, gdkdev->motionnotify_type, class);
}
if (mask & GDK_BUTTON1_MOTION_MASK)
{
DeviceButton1Motion (gdkdev->xdevice, 0, class);
if (class != 0)
classes[i++] = class;
}
if (mask & GDK_BUTTON2_MOTION_MASK)
{
DeviceButton2Motion (gdkdev->xdevice, 0, class);
if (class != 0)
classes[i++] = class;
}
if (mask & GDK_BUTTON3_MOTION_MASK)
{
DeviceButton3Motion (gdkdev->xdevice, 0, class);
if (class != 0)
classes[i++] = class;
}
if (mask & GDK_BUTTON_MOTION_MASK)
{
DeviceButtonMotion (gdkdev->xdevice, 0, class);
if (class != 0)
classes[i++] = class;
}
if (mask & GDK_POINTER_MOTION_HINT_MASK)
{
/* We'll get into trouble if the macros change, but at least we'll
know about it, and we avoid warnings now */
DevicePointerMotionHint (gdkdev->xdevice, 0, class);
if (class != 0)
classes[i++] = class;
}
if (mask & GDK_KEY_PRESS_MASK)
{
DeviceKeyPress (gdkdev->xdevice, gdkdev->keypress_type, class);
if (class != 0)
classes[i++] = class;
}
if (mask & GDK_KEY_RELEASE_MASK)
{
DeviceKeyRelease (gdkdev->xdevice, gdkdev->keyrelease_type, class);
if (class != 0)
classes[i++] = class;
}
if (mask & GDK_PROXIMITY_IN_MASK)
{
ProximityIn (gdkdev->xdevice, gdkdev->proximityin_type, class);
if (class != 0)
classes[i++] = class;
}
if (mask & GDK_PROXIMITY_OUT_MASK)
{
ProximityOut (gdkdev->xdevice, gdkdev->proximityout_type, class);
if (class != 0)
classes[i++] = class;
}
*num_classes = i;
}
void
_gdk_input_common_select_events(GdkWindow *window,
GdkDevicePrivate *gdkdev)
{
XEventClass classes[GDK_MAX_DEVICE_CLASSES];
gint num_classes;
if (gdkdev->info.mode == GDK_MODE_DISABLED)
_gdk_input_common_find_events(window, gdkdev, 0, classes, &num_classes);
else
_gdk_input_common_find_events(window, gdkdev,
((GdkWindowObject *)window)->extension_events,
classes, &num_classes);
XSelectExtensionEvent (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XWINDOW (window),
classes, num_classes);
}
gint
_gdk_input_common_init (GdkDisplay *display,
gint include_core)
{
XDeviceInfo *devices;
int num_devices, loop;
int ignore, event_base;
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
/* Init XInput extension */
display_x11->input_devices = NULL;
if (XQueryExtension (display_x11->xdisplay, "XInputExtension",
&ignore, &event_base, &ignore))
{
gdk_x11_register_standard_event_type (display,
event_base, 15 /* Number of events */);
devices = XListInputDevices(display_x11->xdisplay, &num_devices);
for(loop=0; loop<num_devices; loop++)
{
GdkDevicePrivate *gdkdev = gdk_input_device_new(display,
&devices[loop],
include_core);
if (gdkdev)
display_x11->input_devices = g_list_append(display_x11->input_devices, gdkdev);
}
XFreeDeviceList(devices);
}
display_x11->input_devices = g_list_append (display_x11->input_devices, display->core_pointer);
return TRUE;
}
static void
gdk_input_translate_coordinates (GdkDevicePrivate *gdkdev,
GdkInputWindow *input_window,
gint *axis_data,
gdouble *axis_out,
gdouble *x_out,
gdouble *y_out)
{
GdkWindowImplX11 *impl;
int i;
int x_axis = 0;
int y_axis = 0;
double device_width, device_height;
double x_offset, y_offset, x_scale, y_scale;
impl = GDK_WINDOW_IMPL_X11 (((GdkWindowObject *) input_window->window)->impl);
for (i=0; i<gdkdev->info.num_axes; i++)
{
switch (gdkdev->info.axes[i].use)
{
case GDK_AXIS_X:
x_axis = i;
break;
case GDK_AXIS_Y:
y_axis = i;
break;
default:
break;
}
}
device_width = gdkdev->axes[x_axis].max_value -
gdkdev->axes[x_axis].min_value;
device_height = gdkdev->axes[y_axis].max_value -
gdkdev->axes[y_axis].min_value;
if (gdkdev->info.mode == GDK_MODE_SCREEN)
{
x_scale = gdk_screen_get_width (gdk_drawable_get_screen (input_window->window)) / device_width;
y_scale = gdk_screen_get_height (gdk_drawable_get_screen (input_window->window)) / device_height;
x_offset = - input_window->root_x;
y_offset = - input_window->root_y;
}
else /* GDK_MODE_WINDOW */
{
double x_resolution = gdkdev->axes[x_axis].resolution;
double y_resolution = gdkdev->axes[y_axis].resolution;
double device_aspect;
/*
* Some drivers incorrectly report the resolution of the device
* as zero (in partiular linuxwacom < 0.5.3 with usb tablets).
* This causes the device_aspect to become NaN and totally
* breaks windowed mode. If this is the case, the best we can
* do is to assume the resolution is non-zero is equal in both
* directions (which is true for many devices). The absolute
* value of the resolution doesn't matter since we only use the
* ratio.
*/
if ((x_resolution == 0) || (y_resolution == 0))
{
x_resolution = 1;
y_resolution = 1;
}
device_aspect = (device_height*y_resolution) /
(device_width*x_resolution);
if (device_aspect * impl->width >= impl->height)
{
/* device taller than window */
x_scale = impl->width / device_width;
y_scale = (x_scale * x_resolution)
/ y_resolution;
x_offset = 0;
y_offset = -(device_height * y_scale -
impl->height)/2;
}
else
{
/* window taller than device */
y_scale = impl->height / device_height;
x_scale = (y_scale * y_resolution)
/ x_resolution;
y_offset = 0;
x_offset = - (device_width * x_scale - impl->width)/2;
}
}
for (i=0; i<gdkdev->info.num_axes; i++)
{
switch (gdkdev->info.axes[i].use)
{
case GDK_AXIS_X:
axis_out[i] = x_offset + x_scale * (axis_data[x_axis] -
gdkdev->axes[x_axis].min_value);
if (x_out)
*x_out = axis_out[i];
break;
case GDK_AXIS_Y:
axis_out[i] = y_offset + y_scale * (axis_data[y_axis] -
gdkdev->axes[y_axis].min_value);
if (y_out)
*y_out = axis_out[i];
break;
default:
axis_out[i] =
(gdkdev->info.axes[i].max * (axis_data[i] - gdkdev->axes[i].min_value) +
gdkdev->info.axes[i].min * (gdkdev->axes[i].max_value - axis_data[i])) /
(gdkdev->axes[i].max_value - gdkdev->axes[i].min_value);
break;
}
}
}
/* combine the state of the core device and the device state
* into one - for now we do this in a simple-minded manner -
* we just take the keyboard portion of the core device and
* the button portion (all of?) the device state.
* Any button remapping should go on here.
*/
static guint
gdk_input_translate_state(guint state, guint device_state)
{
return device_state | (state & 0xFF);
}
gboolean
_gdk_input_common_other_event (GdkEvent *event,
XEvent *xevent,
GdkInputWindow *input_window,
GdkDevicePrivate *gdkdev)
{
if ((xevent->type == gdkdev->buttonpress_type) ||
(xevent->type == gdkdev->buttonrelease_type))
{
XDeviceButtonEvent *xdbe = (XDeviceButtonEvent *)(xevent);
if (xdbe->type == gdkdev->buttonpress_type)
{
event->button.type = GDK_BUTTON_PRESS;
gdkdev->button_state |= 1 << xdbe->button;
}
else
{
event->button.type = GDK_BUTTON_RELEASE;
gdkdev->button_state &= ~(1 << xdbe->button);
}
event->button.device = &gdkdev->info;
event->button.window = input_window->window;
event->button.time = xdbe->time;
event->button.axes = g_new (gdouble, gdkdev->info.num_axes);
gdk_input_translate_coordinates (gdkdev,input_window, xdbe->axis_data,
event->button.axes,
&event->button.x,&event->button.y);
event->button.x_root = event->button.x + input_window->root_x;
event->button.y_root = event->button.y + input_window->root_y;
event->button.state = gdk_input_translate_state(xdbe->state,xdbe->device_state);
event->button.button = xdbe->button;
GDK_NOTE (EVENTS,
g_print ("button %s:\t\twindow: %ld device: %ld x,y: %f %f button: %d\n",
(event->button.type == GDK_BUTTON_PRESS) ? "press" : "release",
xdbe->window,
xdbe->deviceid,
event->button.x, event->button.y,
xdbe->button));
/* Update the timestamp of the latest user interaction, if the event has
* a valid timestamp.
*/
if (gdk_event_get_time (event) != GDK_CURRENT_TIME)
gdk_x11_window_set_user_time (gdk_window_get_toplevel (input_window->window),
gdk_event_get_time (event));
return TRUE;
}
if ((xevent->type == gdkdev->keypress_type) ||
(xevent->type == gdkdev->keyrelease_type))
{
XDeviceKeyEvent *xdke = (XDeviceKeyEvent *)(xevent);
GDK_NOTE (EVENTS,
g_print ("device key %s:\twindow: %ld device: %ld keycode: %d\n",
(event->key.type == GDK_KEY_PRESS) ? "press" : "release",
xdke->window,
xdke->deviceid,
xdke->keycode));
if (xdke->keycode < gdkdev->min_keycode ||
xdke->keycode >= gdkdev->min_keycode + gdkdev->info.num_keys)
{
g_warning ("Invalid device key code received");
return FALSE;
}
event->key.keyval = gdkdev->info.keys[xdke->keycode - gdkdev->min_keycode].keyval;
if (event->key.keyval == 0)
{
GDK_NOTE (EVENTS,
g_print ("\t\ttranslation - NONE\n"));
return FALSE;
}
event->key.type = (xdke->type == gdkdev->keypress_type) ?
GDK_KEY_PRESS : GDK_KEY_RELEASE;
event->key.window = input_window->window;
event->key.time = xdke->time;
event->key.state = gdk_input_translate_state(xdke->state, xdke->device_state)
| gdkdev->info.keys[xdke->keycode - gdkdev->min_keycode].modifiers;
/* Add a string translation for the key event */
if ((event->key.keyval >= 0x20) && (event->key.keyval <= 0xFF))
{
event->key.length = 1;
event->key.string = g_new (gchar, 2);
event->key.string[0] = (gchar)event->key.keyval;
event->key.string[1] = 0;
}
else
{
event->key.length = 0;
event->key.string = g_new0 (gchar, 1);
}
GDK_NOTE (EVENTS,
g_print ("\t\ttranslation - keyval: %d modifiers: %#x\n",
event->key.keyval,
event->key.state));
/* Update the timestamp of the latest user interaction, if the event has
* a valid timestamp.
*/
if (gdk_event_get_time (event) != GDK_CURRENT_TIME)
gdk_x11_window_set_user_time (gdk_window_get_toplevel (input_window->window),
gdk_event_get_time (event));
return TRUE;
}
if (xevent->type == gdkdev->motionnotify_type)
{
XDeviceMotionEvent *xdme = (XDeviceMotionEvent *)(xevent);
event->motion.device = &gdkdev->info;
event->motion.axes = g_new (gdouble, gdkdev->info.num_axes);
gdk_input_translate_coordinates(gdkdev,input_window,xdme->axis_data,
event->motion.axes,
&event->motion.x,&event->motion.y);
event->motion.x_root = event->motion.x + input_window->root_x;
event->motion.y_root = event->motion.y + input_window->root_y;
event->motion.type = GDK_MOTION_NOTIFY;
event->motion.window = input_window->window;
event->motion.time = xdme->time;
event->motion.state = gdk_input_translate_state(xdme->state,
xdme->device_state);
event->motion.is_hint = xdme->is_hint;
GDK_NOTE (EVENTS,
g_print ("motion notify:\t\twindow: %ld device: %ld x,y: %f %f state %#4x hint: %s\n",
xdme->window,
xdme->deviceid,
event->motion.x, event->motion.y,
event->motion.state,
(xdme->is_hint) ? "true" : "false"));
/* Update the timestamp of the latest user interaction, if the event has
* a valid timestamp.
*/
if (gdk_event_get_time (event) != GDK_CURRENT_TIME)
gdk_x11_window_set_user_time (gdk_window_get_toplevel (input_window->window),
gdk_event_get_time (event));
return TRUE;
}
if (xevent->type == gdkdev->proximityin_type ||
xevent->type == gdkdev->proximityout_type)
{
XProximityNotifyEvent *xpne = (XProximityNotifyEvent *)(xevent);
event->proximity.device = &gdkdev->info;
event->proximity.type = (xevent->type == gdkdev->proximityin_type)?
GDK_PROXIMITY_IN:GDK_PROXIMITY_OUT;
event->proximity.window = input_window->window;
event->proximity.time = xpne->time;
/* Update the timestamp of the latest user interaction, if the event has
* a valid timestamp.
*/
if (gdk_event_get_time (event) != GDK_CURRENT_TIME)
gdk_x11_window_set_user_time (gdk_window_get_toplevel (input_window->window),
gdk_event_get_time (event));
return TRUE;
}
return FALSE; /* wasn't one of our event types */
}
gboolean
_gdk_device_get_history (GdkDevice *device,
GdkWindow *window,
guint32 start,
guint32 stop,
GdkTimeCoord ***events,
gint *n_events)
{
GdkTimeCoord **coords;
XDeviceTimeCoord *device_coords;
GdkInputWindow *input_window;
GdkDevicePrivate *gdkdev;
gint mode_return;
gint axis_count_return;
gint i;
gdkdev = (GdkDevicePrivate *)device;
input_window = _gdk_input_window_find (window);
g_return_val_if_fail (input_window != NULL, FALSE);
device_coords = XGetDeviceMotionEvents (GDK_WINDOW_XDISPLAY (window),
gdkdev->xdevice,
start, stop,
n_events, &mode_return,
&axis_count_return);
if (device_coords)
{
coords = _gdk_device_allocate_history (device, *n_events);
for (i=0; i<*n_events; i++)
gdk_input_translate_coordinates (gdkdev, input_window,
device_coords[i].data,
coords[i]->axes, NULL, NULL);
XFreeDeviceMotionEvents (device_coords);
*events = coords;
return TRUE;
}
else
return FALSE;
}
void
gdk_device_get_state (GdkDevice *device,
GdkWindow *window,
gdouble *axes,
GdkModifierType *mask)
{
gint i;
g_return_if_fail (device != NULL);
g_return_if_fail (GDK_IS_WINDOW (window));
if (GDK_IS_CORE (device))
{
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;
}
}
else
{
GdkDevicePrivate *gdkdev;
GdkInputWindow *input_window;
XDeviceState *state;
XInputClass *input_class;
if (mask)
gdk_window_get_pointer (window, NULL, NULL, mask);
gdkdev = (GdkDevicePrivate *)device;
input_window = _gdk_input_window_find (window);
g_return_if_fail (input_window != NULL);
state = XQueryDeviceState (GDK_WINDOW_XDISPLAY (window),
gdkdev->xdevice);
input_class = state->data;
for (i=0; i<state->num_classes; i++)
{
switch (input_class->class)
{
case ValuatorClass:
if (axes)
gdk_input_translate_coordinates (gdkdev, input_window,
((XValuatorState *)input_class)->valuators,
axes, NULL, NULL);
break;
case ButtonClass:
if (mask)
{
*mask &= 0xFF;
if (((XButtonState *)input_class)->num_buttons > 0)
*mask |= ((XButtonState *)input_class)->buttons[0] << 7;
/* GDK_BUTTON1_MASK = 1 << 8, and button n is stored
* in bit 1<<(n%8) in byte n/8. n = 1,2,... */
}
break;
}
input_class = (XInputClass *)(((char *)input_class)+input_class->length);
}
XFreeDeviceState (state);
}
}
#define __GDK_INPUT_X11_C__
#include "gdkaliasdef.c"
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