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gtk/gdk/gdkinputcommon.h
Elliot Lee 9508b76bd2 Initial revision
1997-11-24 22:37:52 +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 Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#if defined(XINPUT_GXI) || defined(XINPUT_XFREE)
/* Forward declarations */
static void gdk_input_get_root_relative_geometry (Display *dpy, Window w,
int *x_ret, int *y_ret,
int *width_ret,
int *height_ret);
static GdkDevicePrivate *gdk_input_device_new(XDeviceInfo *device,
gint include_core);
static void gdk_input_common_find_events(GdkWindow *window,
GdkDevicePrivate *gdkdev,
gint mask,
XEventClass *classes,
int *num_classes);
static void gdk_input_common_select_events(GdkWindow *window,
GdkDevicePrivate *gdkdev);
static void gdk_input_translate_coordinates(GdkDevicePrivate *gdkdev,
GdkInputWindow *input_window,
gint *axis_data,
gdouble *x, gdouble *y,
gdouble *pressure,
gdouble *xtilt, gdouble *ytilt);
static guint gdk_input_translate_state(guint state, guint device_state);
static gint gdk_input_common_init(gint include_core);
static gint gdk_input_common_other_event (GdkEvent *event,
XEvent *xevent,
GdkInputWindow *input_window,
GdkDevicePrivate *gdkdev);
static void gdk_input_common_set_axes (guint32 deviceid, GdkAxisUse *axes);
static GdkTimeCoord * gdk_input_common_motion_events (GdkWindow *window,
guint32 deviceid,
guint32 start,
guint32 stop,
gint *nevents_return);
static void gdk_input_common_get_pointer (GdkWindow *window,
guint32 deviceid,
gdouble *x,
gdouble *y,
gdouble *pressure,
gdouble *xtilt,
gdouble *ytilt,
GdkModifierType *mask);
/* Global variables */
static gint gdk_input_root_width;
static gint gdk_input_root_height;
static void
gdk_input_get_root_relative_geometry(Display *dpy, Window w, int *x_ret, int *y_ret,
int *width_ret, int *height_ret)
{
Window root,parent;
Window *children;
int nchildren;
int x,y,width,height;
int xc,yc,widthc,heightc,border_widthc,depthc;
XQueryTree(dpy,w,&root,&parent,&children,&nchildren);
if (children) XFree(children);
XGetGeometry(dpy,w,&root,&x,&y,&width,&height,&border_widthc,
&depthc);
x += border_widthc;
y += border_widthc;
while (root != parent)
{
w = parent;
XQueryTree(dpy,w,&root,&parent,&children,&nchildren);
if (children) XFree(children);
XGetGeometry(dpy,w,&root,&xc,&yc,&widthc,&heightc,
&border_widthc,&depthc);
x += xc + border_widthc;
y += yc + border_widthc;
}
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(XDeviceInfo *device, gint include_core)
{
GdkDevicePrivate *gdkdev;
gchar *tmp_name, *p;
XAnyClassPtr class;
gint i,j;
gdkdev = g_new(GdkDevicePrivate,1);
gdkdev->info.deviceid = device->id;
if (device->name[0]) {
gdkdev->info.name = g_new(char, strlen(device->name)+1);
strcpy(gdkdev->info.name,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");
strcpy(gdkdev->info.name,"pointer");
gdkdev->info.source = GDK_SOURCE_MOUSE;
}
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_strdup(gdkdev->info.name);
for (p = tmp_name; *p; p++)
{
if (*p >= 'A' && *p <= 'Z')
*p += 'a' - 'A';
}
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->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 ValuatorClass:
{
XValuatorInfo *xvi = (XValuatorInfo *)class;
gdkdev->info.num_axes = xvi->num_axes;
gdkdev->axes = g_new(GdkAxisInfo, xvi->num_axes);
gdkdev->info.axes = g_new(GdkAxisUse, 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] = GDK_AXIS_IGNORE;
}
j=0;
if (j<xvi->num_axes)
gdkdev->info.axes[j++] = GDK_AXIS_X;
if (j<xvi->num_axes)
gdkdev->info.axes[j++] = GDK_AXIS_Y;
if (j<xvi->num_axes)
gdkdev->info.axes[j++] = GDK_AXIS_PRESSURE;
if (j<xvi->num_axes)
gdkdev->info.axes[j++] = GDK_AXIS_XTILT;
if (j<xvi->num_axes)
gdkdev->info.axes[j++] = GDK_AXIS_YTILT;
/* set up reverse lookup on axis use */
for (j=GDK_AXIS_IGNORE;j<GDK_AXIS_LAST;j++)
gdkdev->axis_for_use[j] = -1;
for (j=0;j<xvi->num_axes;j++)
if (gdkdev->info.axes[j] != GDK_AXIS_IGNORE)
gdkdev->axis_for_use[gdkdev->info.axes[j]] = j;
break;
}
}
class = (XAnyClassPtr)(((char *)class) + class->length);
}
/* return NULL if no axes */
if (!gdkdev->info.num_axes || !gdkdev->axes ||
(!include_core && device->use == IsXPointer))
{
g_free(gdkdev->info.name);
if (gdkdev->axes)
g_free(gdkdev->axes);
g_free(gdkdev);
return NULL;
}
if (device->use != IsXPointer)
gdkdev->xdevice = XOpenDevice(gdk_display, gdkdev->info.deviceid);
return gdkdev;
}
static void
gdk_input_common_find_events(GdkWindow *window,
GdkDevicePrivate *gdkdev,
gint mask,
XEventClass *classes,
int *num_classes)
{
gint i;
XEventClass class;
i = 0;
/* We have to track press and release events in pairs to keep
track of button state correctly and implement grabbing */
if (mask & GDK_BUTTON_PRESS_MASK || mask & GDK_BUTTON_RELEASE_MASK)
{
DeviceButtonPress (gdkdev->xdevice, gdkdev->buttonpress_type,
class);
if (class != 0)
classes[i++] = class;
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;
}
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_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;
}
static void
gdk_input_common_select_events(GdkWindow *window,
GdkDevicePrivate *gdkdev)
{
XEventClass classes[6];
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,
((GdkWindowPrivate *)window)->extension_events,
classes, &num_classes);
XSelectExtensionEvent (gdk_display,
GDK_WINDOW_XWINDOW(window),
classes, num_classes);
}
gint
gdk_input_common_init(gint include_core)
{
char **extensions;
XDeviceInfo *devices;
int num_devices;
int num_extensions, loop;
Display *display = gdk_display;
/* Init global vars */
gdk_window_get_geometry(NULL, /* use root window */
NULL,NULL,
&gdk_input_root_width,&gdk_input_root_height,
NULL);
/* Init XInput extension */
extensions = XListExtensions(display, &num_extensions);
for (loop = 0; loop < num_extensions &&
(strcmp(extensions[loop], "XInputExtension") != 0); loop++);
XFreeExtensionList(extensions);
if (loop == num_extensions) /* XInput extension not found */
return FALSE;
gdk_input_devices = 0;
devices = XListInputDevices(display, &num_devices);
for(loop=0; loop<num_devices; loop++)
{
GdkDevicePrivate *gdkdev = gdk_input_device_new(&devices[loop],
include_core);
if (gdkdev)
gdk_input_devices = g_list_append(gdk_input_devices, gdkdev);
}
XFreeDeviceList(devices);
gdk_input_devices = g_list_append (gdk_input_devices, &gdk_input_core_info);
return TRUE;
}
static void
gdk_input_translate_coordinates (GdkDevicePrivate *gdkdev,
GdkInputWindow *input_window,
gint *axis_data,
gdouble *x, gdouble *y, gdouble *pressure,
gdouble *xtilt, gdouble *ytilt)
{
GdkWindowPrivate *win_priv;
int x_axis, y_axis, pressure_axis, xtilt_axis, ytilt_axis;
double device_width, device_height;
double x_offset, y_offset, x_scale, y_scale;
win_priv = (GdkWindowPrivate *) input_window->window;
x_axis = gdkdev->axis_for_use[GDK_AXIS_X];
y_axis = gdkdev->axis_for_use[GDK_AXIS_Y];
pressure_axis = gdkdev->axis_for_use[GDK_AXIS_PRESSURE];
xtilt_axis = gdkdev->axis_for_use[GDK_AXIS_XTILT];
ytilt_axis = gdkdev->axis_for_use[GDK_AXIS_YTILT];
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_input_root_width / device_width;
y_scale = gdk_input_root_height / device_height;
x_offset = - input_window->root_x;
y_offset = - input_window->root_y;
}
else /* GDK_MODE_WINDOW */
{
double device_aspect = (device_height*gdkdev->axes[y_axis].resolution) /
(device_width*gdkdev->axes[x_axis].resolution);
if (device_aspect * win_priv->width >= win_priv->height)
{
/* device taller than window */
x_scale = win_priv->width / device_width;
y_scale = (x_scale * gdkdev->axes[x_axis].resolution)
/ gdkdev->axes[y_axis].resolution;
x_offset = 0;
y_offset = -(device_height * y_scale -
win_priv->height)/2;
}
else
{
/* window taller than device */
y_scale = win_priv->height / device_height;
x_scale = (y_scale * gdkdev->axes[y_axis].resolution)
/ gdkdev->axes[x_axis].resolution;
y_offset = 0;
x_offset = - (device_width * x_scale - win_priv->width)/2;
}
}
if (x) *x = x_offset + x_scale*axis_data[x_axis];
if (y) *y = y_offset + y_scale*axis_data[y_axis];
if (pressure)
{
if (pressure_axis != -1)
*pressure = ((double)axis_data[pressure_axis]
- gdkdev->axes[pressure_axis].min_value)
/ (gdkdev->axes[pressure_axis].max_value
- gdkdev->axes[pressure_axis].min_value);
else
*pressure = 0.5;
}
if (xtilt)
{
if (xtilt_axis != -1)
{
*xtilt = 2. * (double)(axis_data[xtilt_axis] -
(gdkdev->axes[xtilt_axis].min_value +
gdkdev->axes[xtilt_axis].max_value)/2) /
(gdkdev->axes[xtilt_axis].max_value -
gdkdev->axes[xtilt_axis].min_value);
}
else *xtilt = 0;
}
if (ytilt)
{
if (ytilt_axis != -1)
{
*ytilt = 2. * (double)(axis_data[ytilt_axis] -
(gdkdev->axes[ytilt_axis].min_value +
gdkdev->axes[ytilt_axis].max_value)/2) /
(gdkdev->axes[ytilt_axis].max_value -
gdkdev->axes[ytilt_axis].min_value);
}
else
*ytilt = 0;
}
}
/* 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);
}
static gint
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.window = input_window->window;
event->button.time = xdbe->time;
event->button.source = gdkdev->info.source;
event->button.deviceid = xdbe->deviceid;
gdk_input_translate_coordinates (gdkdev,input_window, xdbe->axis_data,
&event->button.x,&event->button.y,
&event->button.pressure,
&event->button.xtilt,
&event->button.ytilt);
event->button.state = gdk_input_translate_state(xdbe->state,xdbe->device_state);
event->button.button = xdbe->button;
return TRUE;
}
if (xevent->type == gdkdev->motionnotify_type)
{
XDeviceMotionEvent *xdme = (XDeviceMotionEvent *)(xevent);
gdk_input_translate_coordinates(gdkdev,input_window,xdme->axis_data,
&event->motion.x,&event->motion.y,
&event->motion.pressure,
&event->motion.xtilt,
&event->motion.ytilt);
event->motion.type = GDK_MOTION_NOTIFY;
event->motion.window = input_window->window;
event->motion.time = xdme->time;
event->motion.deviceid = xdme->deviceid;
event->motion.state = gdk_input_translate_state(xdme->state,
xdme->device_state);
event->motion.source = gdkdev->info.source;
event->motion.deviceid = xdme->deviceid;
if (gdk_show_events)
g_print ("motion notify:\t\twindow: %ld device: %ld x,y: %f %f hint: %s\n",
xdme->window,
xdme->deviceid,
event->motion.x, event->motion.y,
(xevent->xmotion.is_hint) ? "true" : "false");
return TRUE;
}
if (xevent->type == gdkdev->proximityin_type ||
xevent->type == gdkdev->proximityout_type)
{
XProximityNotifyEvent *xpne = (XProximityNotifyEvent *)(xevent);
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;
event->proximity.source = gdkdev->info.source;
event->proximity.deviceid = xpne->deviceid;
return TRUE;
}
return -1; /* wasn't one of our event types */
}
static void
gdk_input_common_set_axes (guint32 deviceid, GdkAxisUse *axes)
{
int i;
GdkDevicePrivate *gdkdev = gdk_input_find_device(deviceid);
g_return_if_fail (gdkdev != NULL);
for (i=GDK_AXIS_IGNORE;i<GDK_AXIS_LAST;i++)
{
gdkdev->axis_for_use[i] = -1;
}
for (i=0;i<gdkdev->info.num_axes;i++)
{
gdkdev->info.axes[i] = axes[i];
gdkdev->axis_for_use[axes[i]] = i;
}
}
static GdkTimeCoord *
gdk_input_common_motion_events (GdkWindow *window,
guint32 deviceid,
guint32 start,
guint32 stop,
gint *nevents_return)
{
GdkTimeCoord *coords;
XDeviceTimeCoord *device_coords;
GdkInputWindow *input_window;
GdkDevicePrivate *gdkdev;
int mode_return;
int axis_count_return;
int i;
gdkdev = gdk_input_find_device (deviceid);
input_window = gdk_input_window_find (window);
g_return_val_if_fail (gdkdev != NULL, NULL);
g_return_val_if_fail (gdkdev->xdevice != NULL, NULL);
g_return_val_if_fail (input_window != NULL, NULL);
device_coords = XGetDeviceMotionEvents (gdk_display,
gdkdev->xdevice,
start, stop,
nevents_return, &mode_return,
&axis_count_return);
if (device_coords)
{
coords = g_new (GdkTimeCoord, *nevents_return);
for (i=0; i<*nevents_return; i++)
{
gdk_input_translate_coordinates (gdkdev, input_window,
device_coords[i].data,
&coords[i].x, &coords[i].y,
&coords[i].pressure,
&coords[i].xtilt, &coords[i].ytilt);
}
XFreeDeviceMotionEvents (device_coords);
return coords;
}
else
return NULL;
}
static void
gdk_input_common_get_pointer (GdkWindow *window,
guint32 deviceid,
gdouble *x,
gdouble *y,
gdouble *pressure,
gdouble *xtilt,
gdouble *ytilt,
GdkModifierType *mask)
{
GdkDevicePrivate *gdkdev;
GdkInputWindow *input_window;
XDeviceState *state;
XInputClass *input_class;
gint x_int, y_int;
gint i;
/* we probably need to get the mask in any case */
if (deviceid == GDK_CORE_POINTER)
{
gdk_window_get_pointer (window, &x_int, &y_int, mask);
if (x) *x = x_int;
if (y) *y = y_int;
if (pressure) *pressure = 0.5;
if (xtilt) *xtilt = 0;
if (ytilt) *ytilt = 0;
}
else
{
if (mask)
gdk_window_get_pointer (window, NULL, NULL, mask);
gdkdev = gdk_input_find_device (deviceid);
input_window = gdk_input_window_find (window);
g_return_if_fail (gdkdev != NULL);
g_return_if_fail (gdkdev->xdevice != NULL);
g_return_if_fail (input_window != NULL);
state = XQueryDeviceState (gdk_display, gdkdev->xdevice);
input_class = state->data;
for (i=0; i<state->num_classes; i++)
{
switch (input_class->class)
{
case ValuatorClass:
gdk_input_translate_coordinates(gdkdev, input_window,
((XValuatorState *)input_class)->valuators,
x, y, pressure,
xtilt, ytilt);
break;
case ButtonClass:
if (mask)
{
*mask &= ~(GDK_BUTTON1_MASK | GDK_BUTTON2_MASK |
GDK_BUTTON3_MASK | GDK_BUTTON4_MASK |
GDK_BUTTON5_MASK);
for (i=0; i < ((XButtonState *)input_class)->num_buttons; i++)
{
if (((XButtonState *)input_class)->buttons[i])
*mask |= GDK_BUTTON1_MASK << i;
}
}
break;
}
input_class = (XInputClass *)(((char *)input_class)+input_class->length);
}
}
}
#endif
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