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230ce9bfde
gtk2/gdk/gdkdevice.c
Carlos Garnacho 230ce9bfde gdk: Remove gdk_device_get_axes() 
Besides the implicit x/y assumptions, devices don't have axes. Those
are actually provided by the GdkDeviceTool driving the device, and
different tools may have different axes.

It does not make sense to offer this API that can change beneath
someone's feet, we now have gdk_device_tool_get_axes() which is static
to the tool.
2020-07-29 01:27:51 +02:00

1497 lines
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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 <math.h>
#include "gdkdeviceprivate.h"
#include "gdkdevicetool.h"
#include "gdkdisplayprivate.h"
#include "gdkinternals.h"
#include "gdkintl.h"
#include "gdkkeysprivate.h"
/**
* SECTION:gdkdevice
* @Short_description: Object representing an input device
* @Title: GdkDevice
* @See_also: #GdkSeat
*
* The #GdkDevice object represents a single input device, such
* as a keyboard, a mouse, a touchpad, etc.
*
* See the #GdkSeat documentation for more information
* about the various kinds of logical and physical devices, and their
* relationships.
*/
/**
* GdkDevice:
*
* The GdkDevice struct contains only private fields and
* should not be accessed directly.
*/
typedef struct _GdkAxisInfo GdkAxisInfo;
struct _GdkAxisInfo
{
GdkAxisUse use;
double min_axis;
double max_axis;
double min_value;
double max_value;
double resolution;
};
enum {
CHANGED,
TOOL_CHANGED,
LAST_SIGNAL
};
static guint signals [LAST_SIGNAL] = { 0 };
static void gdk_device_finalize (GObject *object);
static void gdk_device_dispose (GObject *object);
static void gdk_device_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gdk_device_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
G_DEFINE_ABSTRACT_TYPE (GdkDevice, gdk_device, G_TYPE_OBJECT)
enum {
PROP_0,
PROP_DISPLAY,
PROP_NAME,
PROP_ASSOCIATED_DEVICE,
PROP_TYPE,
PROP_SOURCE,
PROP_HAS_CURSOR,
PROP_N_AXES,
PROP_VENDOR_ID,
PROP_PRODUCT_ID,
PROP_SEAT,
PROP_NUM_TOUCHES,
PROP_TOOL,
PROP_DIRECTION,
PROP_HAS_BIDI_LAYOUTS,
PROP_CAPS_LOCK_STATE,
PROP_NUM_LOCK_STATE,
PROP_SCROLL_LOCK_STATE,
PROP_MODIFIER_STATE,
LAST_PROP
};
static GParamSpec *device_props[LAST_PROP] = { NULL, };
static void
gdk_device_class_init (GdkDeviceClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gdk_device_finalize;
object_class->dispose = gdk_device_dispose;
object_class->set_property = gdk_device_set_property;
object_class->get_property = gdk_device_get_property;
/**
* GdkDevice:display:
*
* The #GdkDisplay the #GdkDevice pertains to.
*/
device_props[PROP_DISPLAY] =
g_param_spec_object ("display",
P_("Device Display"),
P_("Display which the device belongs to"),
GDK_TYPE_DISPLAY,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
/**
* GdkDevice:name:
*
* The device name.
*/
device_props[PROP_NAME] =
g_param_spec_string ("name",
P_("Device name"),
P_("Device name"),
NULL,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
/**
* GdkDevice:type:
*
* Device role in the device manager.
*/
device_props[PROP_TYPE] =
g_param_spec_enum ("type",
P_("Device type"),
P_("Device role in the device manager"),
GDK_TYPE_DEVICE_TYPE,
GDK_DEVICE_TYPE_LOGICAL,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
/**
* GdkDevice:associated-device:
*
* Associated pointer or keyboard with this device, if any. Devices of
* type #GDK_DEVICE_TYPE_LOGICAL always come in keyboard/pointer pairs.
* Other device types will have a %NULL associated device.
*/
device_props[PROP_ASSOCIATED_DEVICE] =
g_param_spec_object ("associated-device",
P_("Associated device"),
P_("Associated pointer or keyboard with this device"),
GDK_TYPE_DEVICE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkDevice:source:
*
* Source type for the device.
*/
device_props[PROP_SOURCE] =
g_param_spec_enum ("source",
P_("Input source"),
P_("Source type for the device"),
GDK_TYPE_INPUT_SOURCE,
GDK_SOURCE_MOUSE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY);
/**
* GdkDevice:has-cursor:
*
* Whether the device is represented by a cursor on the screen. Devices of type
* %GDK_DEVICE_TYPE_LOGICAL will have %TRUE here.
*/
device_props[PROP_HAS_CURSOR] =
g_param_spec_boolean ("has-cursor",
P_("Whether the device has a cursor"),
P_("Whether there is a visible cursor following device motion"),
FALSE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
/**
* GdkDevice:n-axes:
*
* Number of axes in the device.
*/
device_props[PROP_N_AXES] =
g_param_spec_uint ("n-axes",
P_("Number of axes in the device"),
P_("Number of axes in the device"),
0, G_MAXUINT,
0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkDevice:vendor-id:
*
* Vendor ID of this device, see gdk_device_get_vendor_id().
*/
device_props[PROP_VENDOR_ID] =
g_param_spec_string ("vendor-id",
P_("Vendor ID"),
P_("Vendor ID"),
NULL,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
/**
* GdkDevice:product-id:
*
* Product ID of this device, see gdk_device_get_product_id().
*/
device_props[PROP_PRODUCT_ID] =
g_param_spec_string ("product-id",
P_("Product ID"),
P_("Product ID"),
NULL,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
/**
* GdkDevice:seat:
*
* #GdkSeat of this device.
*/
device_props[PROP_SEAT] =
g_param_spec_object ("seat",
P_("Seat"),
P_("Seat"),
GDK_TYPE_SEAT,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS);
/**
* GdkDevice:num-touches:
*
* The maximal number of concurrent touches on a touch device.
* Will be 0 if the device is not a touch device or if the number
* of touches is unknown.
*/
device_props[PROP_NUM_TOUCHES] =
g_param_spec_uint ("num-touches",
P_("Number of concurrent touches"),
P_("Number of concurrent touches"),
0, G_MAXUINT,
0,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
device_props[PROP_TOOL] =
g_param_spec_object ("tool",
P_("Tool"),
P_("The tool that is currently used with this device"),
GDK_TYPE_DEVICE_TOOL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
device_props[PROP_DIRECTION] =
g_param_spec_enum ("direction",
P_("Direction"),
P_("The direction of the current layout of the keyboard"),
PANGO_TYPE_DIRECTION, PANGO_DIRECTION_NEUTRAL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
device_props[PROP_HAS_BIDI_LAYOUTS] =
g_param_spec_boolean ("has-bidi-layouts",
P_("Has bidi layouts"),
P_("Whether the keyboard has bidi layouts"),
FALSE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
device_props[PROP_CAPS_LOCK_STATE] =
g_param_spec_boolean ("caps-lock-state",
P_("Caps lock state"),
P_("Whether the keyboard caps lock is on"),
FALSE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
device_props[PROP_NUM_LOCK_STATE] =
g_param_spec_boolean ("num-lock-state",
P_("Num lock state"),
P_("Whether the keyboard num lock is on"),
FALSE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
device_props[PROP_SCROLL_LOCK_STATE] =
g_param_spec_boolean ("scroll-lock-state",
P_("Scroll lock state"),
P_("Whether the keyboard scroll lock is on"),
FALSE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
device_props[PROP_MODIFIER_STATE] =
g_param_spec_flags ("modifier-state",
P_("Modifier state"),
P_("The modifier state of the keyboard"),
GDK_TYPE_MODIFIER_TYPE, 0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, LAST_PROP, device_props);
/**
* GdkDevice::changed:
* @device: the #GdkDevice that changed.
*
* The ::changed signal is emitted either when the #GdkDevice
* has changed the number of either axes or keys. For example
* on X11 this will normally happen when the physical device
* routing events through the logical device changes (for
* example, user switches from the USB mouse to a tablet); in
* that case the logical device will change to reflect the axes
* and keys on the new physical device.
*/
signals[CHANGED] =
g_signal_new (g_intern_static_string ("changed"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
0, NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GdkDevice::tool-changed:
* @device: the #GdkDevice that changed.
* @tool: The new current tool
*
* The ::tool-changed signal is emitted on pen/eraser
* #GdkDevices whenever tools enter or leave proximity.
*/
signals[TOOL_CHANGED] =
g_signal_new (g_intern_static_string ("tool-changed"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
0, NULL, NULL,
NULL,
G_TYPE_NONE, 1, GDK_TYPE_DEVICE_TOOL);
}
static void
gdk_device_init (GdkDevice *device)
{
device->axes = g_array_new (FALSE, TRUE, sizeof (GdkAxisInfo));
}
static void
gdk_device_finalize (GObject *object)
{
GdkDevice *device = GDK_DEVICE (object);
if (device->axes)
{
g_array_free (device->axes, TRUE);
device->axes = NULL;
}
g_clear_pointer (&device->name, g_free);
g_clear_pointer (&device->vendor_id, g_free);
g_clear_pointer (&device->product_id, g_free);
G_OBJECT_CLASS (gdk_device_parent_class)->finalize (object);
}
static void
gdk_device_dispose (GObject *object)
{
GdkDevice *device = GDK_DEVICE (object);
GdkDevice *associated = device->associated;
if (associated && device->type == GDK_DEVICE_TYPE_PHYSICAL)
_gdk_device_remove_physical_device (associated, device);
if (associated)
{
device->associated = NULL;
if (device->type == GDK_DEVICE_TYPE_LOGICAL &&
associated->associated == device)
_gdk_device_set_associated_device (associated, NULL);
g_object_unref (associated);
}
g_clear_object (&device->last_tool);
G_OBJECT_CLASS (gdk_device_parent_class)->dispose (object);
}
static void
gdk_device_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GdkDevice *device = GDK_DEVICE (object);
switch (prop_id)
{
case PROP_DISPLAY:
device->display = g_value_get_object (value);
break;
case PROP_NAME:
g_free (device->name);
device->name = g_value_dup_string (value);
break;
case PROP_TYPE:
device->type = g_value_get_enum (value);
break;
case PROP_SOURCE:
device->source = g_value_get_enum (value);
break;
case PROP_HAS_CURSOR:
device->has_cursor = g_value_get_boolean (value);
break;
case PROP_VENDOR_ID:
device->vendor_id = g_value_dup_string (value);
break;
case PROP_PRODUCT_ID:
device->product_id = g_value_dup_string (value);
break;
case PROP_SEAT:
device->seat = g_value_get_object (value);
break;
case PROP_NUM_TOUCHES:
device->num_touches = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_device_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GdkDevice *device = GDK_DEVICE (object);
switch (prop_id)
{
case PROP_DISPLAY:
g_value_set_object (value, device->display);
break;
case PROP_ASSOCIATED_DEVICE:
g_value_set_object (value, device->associated);
break;
case PROP_NAME:
g_value_set_string (value, device->name);
break;
case PROP_TYPE:
g_value_set_enum (value, device->type);
break;
case PROP_SOURCE:
g_value_set_enum (value, device->source);
break;
case PROP_HAS_CURSOR:
g_value_set_boolean (value, device->has_cursor);
break;
case PROP_N_AXES:
g_value_set_uint (value, device->axes->len);
break;
case PROP_VENDOR_ID:
g_value_set_string (value, device->vendor_id);
break;
case PROP_PRODUCT_ID:
g_value_set_string (value, device->product_id);
break;
case PROP_SEAT:
g_value_set_object (value, device->seat);
break;
case PROP_NUM_TOUCHES:
g_value_set_uint (value, device->num_touches);
break;
case PROP_TOOL:
g_value_set_object (value, device->last_tool);
break;
case PROP_DIRECTION:
g_value_set_enum (value, gdk_device_get_direction (device));
break;
case PROP_HAS_BIDI_LAYOUTS:
g_value_set_boolean (value, gdk_device_has_bidi_layouts (device));
break;
case PROP_CAPS_LOCK_STATE:
g_value_set_boolean (value, gdk_device_get_caps_lock_state (device));
break;
case PROP_NUM_LOCK_STATE:
g_value_set_boolean (value, gdk_device_get_num_lock_state (device));
break;
case PROP_SCROLL_LOCK_STATE:
g_value_set_boolean (value, gdk_device_get_scroll_lock_state (device));
break;
case PROP_MODIFIER_STATE:
g_value_set_flags (value, gdk_device_get_modifier_state (device));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/*
* gdk_device_get_position:
* @device: pointer device to query status about.
* @x: (out): location to store root window X coordinate of @device
* @y: (out): location to store root window Y coordinate of @device
*
* Gets the current location of @device in double precision.
*/
void
gdk_device_get_position (GdkDevice *device,
double *x,
double *y)
{
g_return_if_fail (GDK_IS_DEVICE (device));
g_return_if_fail (device->source != GDK_SOURCE_KEYBOARD);
g_return_if_fail (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_PHYSICAL ||
gdk_display_device_is_grabbed (gdk_device_get_display (device), device));
_gdk_device_query_state (device, NULL, NULL, x, y, NULL);
}
/**
* gdk_device_get_surface_at_position:
* @device: pointer #GdkDevice to query info to.
* @win_x: (out) (allow-none): return location for the X coordinate of the device location,
* relative to the surface origin, or %NULL.
* @win_y: (out) (allow-none): return location for the Y coordinate of the device location,
* relative to the surface origin, or %NULL.
*
* Obtains the surface underneath @device, returning the location of the device in @win_x and @win_y in
* double precision. Returns %NULL if the surface tree under @device is not known to GDK (for example,
* belongs to another application).
*
* As a physical device coordinates are those of its logical pointer, this
* function may not be called on devices of type %GDK_DEVICE_TYPE_PHYSICAL,
* unless there is an ongoing grab on them, see gdk_seat_grab().
*
* Returns: (nullable) (transfer none): the #GdkSurface under the
* device position, or %NULL.
**/
GdkSurface *
gdk_device_get_surface_at_position (GdkDevice *device,
double *win_x,
double *win_y)
{
double tmp_x, tmp_y;
GdkSurface *surface;
g_return_val_if_fail (GDK_IS_DEVICE (device), NULL);
g_return_val_if_fail (device->source != GDK_SOURCE_KEYBOARD, NULL);
g_return_val_if_fail (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_PHYSICAL ||
gdk_display_device_is_grabbed (gdk_device_get_display (device), device), NULL);
surface = _gdk_device_surface_at_position (device, &tmp_x, &tmp_y, NULL);
if (win_x)
*win_x = tmp_x;
if (win_y)
*win_y = tmp_y;
return surface;
}
/**
* gdk_device_get_name:
* @device: a #GdkDevice
*
* Determines the name of the device.
*
* Returns: a name
**/
const char *
gdk_device_get_name (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), NULL);
return device->name;
}
/**
* gdk_device_get_has_cursor:
* @device: a #GdkDevice
*
* Determines whether the pointer follows device motion.
* This is not meaningful for keyboard devices, which don't have a pointer.
*
* Returns: %TRUE if the pointer follows device motion
**/
gboolean
gdk_device_get_has_cursor (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), FALSE);
return device->has_cursor;
}
/**
* gdk_device_get_source:
* @device: a #GdkDevice
*
* Determines the type of the device.
*
* Returns: a #GdkInputSource
**/
GdkInputSource
gdk_device_get_source (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), 0);
return device->source;
}
/**
* gdk_device_get_axis_use:
* @device: a pointer #GdkDevice.
* @index_: the index of the axis.
*
* Returns the axis use for @index_.
*
* Returns: a #GdkAxisUse specifying how the axis is used.
**/
GdkAxisUse
gdk_device_get_axis_use (GdkDevice *device,
guint index_)
{
GdkAxisInfo *info;
g_return_val_if_fail (GDK_IS_DEVICE (device), GDK_AXIS_IGNORE);
g_return_val_if_fail (device->source != GDK_SOURCE_KEYBOARD, GDK_AXIS_IGNORE);
g_return_val_if_fail (index_ < device->axes->len, GDK_AXIS_IGNORE);
info = &g_array_index (device->axes, GdkAxisInfo, index_);
return info->use;
}
/**
* gdk_device_get_display:
* @device: a #GdkDevice
*
* Returns the #GdkDisplay to which @device pertains.
*
* Returns: (transfer none): a #GdkDisplay. This memory is owned
* by GTK+, and must not be freed or unreffed.
**/
GdkDisplay *
gdk_device_get_display (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), NULL);
return device->display;
}
/**
* gdk_device_get_associated_device:
* @device: a #GdkDevice
*
* Returns the #GdkDevice associated to @device:
*
* - if @device is of type %GDK_DEVICE_TYPE_LOGICAL, it will return
* the paired pointer or keyboard.
* - if @device is of type %GDK_DEVICE_TYPE_PHYSICAL, it will return
* the logical device to which @device is attached to.
* - if @device is of type %GDK_DEVICE_TYPE_FLOATING, %NULL will be
* returned, as there is no associated device.
*
* Returns: (nullable) (transfer none): The associated device, or
* %NULL
**/
GdkDevice *
gdk_device_get_associated_device (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), NULL);
return device->associated;
}
static void
_gdk_device_set_device_type (GdkDevice *device,
GdkDeviceType type)
{
if (device->type != type)
{
device->type = type;
g_object_notify_by_pspec (G_OBJECT (device), device_props[PROP_TYPE]);
}
}
void
_gdk_device_set_associated_device (GdkDevice *device,
GdkDevice *associated)
{
g_return_if_fail (GDK_IS_DEVICE (device));
g_return_if_fail (associated == NULL || GDK_IS_DEVICE (associated));
if (device->associated == associated)
return;
if (device->associated)
{
g_object_unref (device->associated);
device->associated = NULL;
}
if (associated)
device->associated = g_object_ref (associated);
if (device->type != GDK_DEVICE_TYPE_LOGICAL)
{
if (device->associated)
_gdk_device_set_device_type (device, GDK_DEVICE_TYPE_PHYSICAL);
else
_gdk_device_set_device_type (device, GDK_DEVICE_TYPE_FLOATING);
}
}
/**
* gdk_device_list_physical_devices:
* @device: a logical #GdkDevice
*
* Returns the list of physical devices attached to the given logical
* #GdkDevice.
*
* Returns: (nullable) (transfer container) (element-type GdkDevice):
* the list of physical devices attached to a logical #GdkDevice
*/
GList *
gdk_device_list_physical_devices (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), NULL);
g_return_val_if_fail (gdk_device_get_device_type (device) == GDK_DEVICE_TYPE_LOGICAL, NULL);
return g_list_copy (device->physical_devices);
}
void
_gdk_device_add_physical_device (GdkDevice *device,
GdkDevice *physical)
{
g_return_if_fail (gdk_device_get_device_type (device) == GDK_DEVICE_TYPE_LOGICAL);
g_return_if_fail (gdk_device_get_device_type (physical) != GDK_DEVICE_TYPE_LOGICAL);
if (!g_list_find (device->physical_devices, physical))
device->physical_devices = g_list_prepend (device->physical_devices, physical);
}
void
_gdk_device_remove_physical_device (GdkDevice *device,
GdkDevice *physical)
{
GList *elem;
g_return_if_fail (gdk_device_get_device_type (device) == GDK_DEVICE_TYPE_LOGICAL);
g_return_if_fail (gdk_device_get_device_type (physical) != GDK_DEVICE_TYPE_LOGICAL);
elem = g_list_find (device->physical_devices, physical);
if (elem == NULL)
return;
device->physical_devices = g_list_delete_link (device->physical_devices, elem);
}
/**
* gdk_device_get_device_type:
* @device: a #GdkDevice
*
* Returns the device type for @device.
*
* Returns: the #GdkDeviceType for @device.
**/
GdkDeviceType
gdk_device_get_device_type (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), GDK_DEVICE_TYPE_LOGICAL);
return device->type;
}
/**
* gdk_device_get_n_axes:
* @device: a pointer #GdkDevice
*
* Returns the number of axes the device currently has.
*
* Returns: the number of axes.
**/
int
gdk_device_get_n_axes (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), 0);
g_return_val_if_fail (device->source != GDK_SOURCE_KEYBOARD, 0);
return device->axes->len;
}
/**
* gdk_device_get_axis: (skip)
* @device: a #GdkDevice
* @axes: (array): pointer to an array of axes
* @use: the use to look for
* @value: (out): location to store the found value.
*
* Interprets an array of double as axis values for a given device,
* and locates the value in the array for a given axis use.
*
* Returns: %TRUE if the given axis use was found, otherwise %FALSE
**/
gboolean
gdk_device_get_axis (GdkDevice *device,
double *axes,
GdkAxisUse use,
double *value)
{
int i;
g_return_val_if_fail (GDK_IS_DEVICE (device), FALSE);
g_return_val_if_fail (device->source != GDK_SOURCE_KEYBOARD, FALSE);
if (axes == NULL)
return FALSE;
g_return_val_if_fail (device->axes != NULL, FALSE);
for (i = 0; i < device->axes->len; i++)
{
GdkAxisInfo axis_info;
axis_info = g_array_index (device->axes, GdkAxisInfo, i);
if (axis_info.use != use)
continue;
if (value)
*value = axes[i];
return TRUE;
}
return FALSE;
}
static GdkEventMask
get_native_grab_event_mask (GdkEventMask grab_mask)
{
/* Similar to the above but for pointer events only */
return
GDK_POINTER_MOTION_MASK |
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK |
GDK_SCROLL_MASK |
(grab_mask &
~(GDK_BUTTON_MOTION_MASK |
GDK_BUTTON1_MOTION_MASK |
GDK_BUTTON2_MOTION_MASK |
GDK_BUTTON3_MOTION_MASK));
}
GdkGrabStatus
gdk_device_grab (GdkDevice *device,
GdkSurface *surface,
gboolean owner_events,
GdkEventMask event_mask,
GdkCursor *cursor,
guint32 time_)
{
GdkGrabStatus res;
g_return_val_if_fail (GDK_IS_DEVICE (device), GDK_GRAB_FAILED);
g_return_val_if_fail (GDK_IS_SURFACE (surface), GDK_GRAB_FAILED);
g_return_val_if_fail (gdk_surface_get_display (surface) == gdk_device_get_display (device), GDK_GRAB_FAILED);
if (GDK_SURFACE_DESTROYED (surface))
return GDK_GRAB_NOT_VIEWABLE;
res = GDK_DEVICE_GET_CLASS (device)->grab (device,
surface,
owner_events,
get_native_grab_event_mask (event_mask),
NULL,
cursor,
time_);
if (res == GDK_GRAB_SUCCESS)
{
GdkDisplay *display;
gulong serial;
display = gdk_surface_get_display (surface);
serial = _gdk_display_get_next_serial (display);
_gdk_display_add_device_grab (display,
device,
surface,
owner_events,
event_mask,
serial,
time_,
FALSE);
}
return res;
}
void
gdk_device_ungrab (GdkDevice *device,
guint32 time_)
{
g_return_if_fail (GDK_IS_DEVICE (device));
GDK_DEVICE_GET_CLASS (device)->ungrab (device, time_);
}
/* Private API */
void
_gdk_device_reset_axes (GdkDevice *device)
{
int i;
for (i = device->axes->len - 1; i >= 0; i--)
g_array_remove_index (device->axes, i);
g_object_notify_by_pspec (G_OBJECT (device), device_props[PROP_N_AXES]);
}
guint
_gdk_device_add_axis (GdkDevice *device,
GdkAxisUse use,
double min_value,
double max_value,
double resolution)
{
GdkAxisInfo axis_info;
guint pos;
axis_info.use = use;
axis_info.min_value = min_value;
axis_info.max_value = max_value;
axis_info.resolution = resolution;
switch ((guint) use)
{
case GDK_AXIS_X:
case GDK_AXIS_Y:
axis_info.min_axis = 0;
axis_info.max_axis = 0;
break;
case GDK_AXIS_XTILT:
case GDK_AXIS_YTILT:
axis_info.min_axis = -1;
axis_info.max_axis = 1;
break;
default:
axis_info.min_axis = 0;
axis_info.max_axis = 1;
break;
}
device->axes = g_array_append_val (device->axes, axis_info);
pos = device->axes->len - 1;
g_object_notify_by_pspec (G_OBJECT (device), device_props[PROP_N_AXES]);
return pos;
}
void
_gdk_device_get_axis_info (GdkDevice *device,
guint index_,
GdkAxisUse *use,
double *min_value,
double *max_value,
double *resolution)
{
GdkAxisInfo *info;
g_return_if_fail (GDK_IS_DEVICE (device));
g_return_if_fail (index_ < device->axes->len);
info = &g_array_index (device->axes, GdkAxisInfo, index_);
*use = info->use;
*min_value = info->min_value;
*max_value = info->max_value;
*resolution = info->resolution;
}
static GdkAxisInfo *
find_axis_info (GArray *array,
GdkAxisUse use)
{
GdkAxisInfo *info;
int i;
for (i = 0; i < GDK_AXIS_LAST; i++)
{
info = &g_array_index (array, GdkAxisInfo, i);
if (info->use == use)
return info;
}
return NULL;
}
gboolean
_gdk_device_translate_surface_coord (GdkDevice *device,
GdkSurface *surface,
guint index_,
double value,
double *axis_value)
{
GdkAxisInfo axis_info;
GdkAxisInfo *axis_info_x, *axis_info_y;
double device_width, device_height;
double x_offset, y_offset;
double x_scale, y_scale;
double x_min, y_min;
double x_resolution, y_resolution;
double device_aspect;
int surface_width, surface_height;
if (index_ >= device->axes->len)
return FALSE;
axis_info = g_array_index (device->axes, GdkAxisInfo, index_);
if (axis_info.use != GDK_AXIS_X &&
axis_info.use != GDK_AXIS_Y)
return FALSE;
if (axis_info.use == GDK_AXIS_X)
{
axis_info_x = &axis_info;
axis_info_y = find_axis_info (device->axes, GDK_AXIS_Y);
if (axis_info_y == NULL)
return FALSE;
}
else
{
axis_info_x = find_axis_info (device->axes, GDK_AXIS_X);
axis_info_y = &axis_info;
if (axis_info_x == NULL)
return FALSE;
}
device_width = axis_info_x->max_value - axis_info_x->min_value;
device_height = axis_info_y->max_value - axis_info_y->min_value;
x_min = axis_info_x->min_value;
y_min = axis_info_y->min_value;
surface_width = gdk_surface_get_width (surface);
surface_height = gdk_surface_get_height (surface);
x_resolution = axis_info_x->resolution;
y_resolution = axis_info_y->resolution;
/*
* 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 * surface_width >= surface_height)
{
/* device taller than surface */
x_scale = surface_width / device_width;
y_scale = (x_scale * x_resolution) / y_resolution;
x_offset = 0;
y_offset = - (device_height * y_scale - surface_height) / 2;
}
else
{
/* surface taller than device */
y_scale = surface_height / device_height;
x_scale = (y_scale * y_resolution) / x_resolution;
y_offset = 0;
x_offset = - (device_width * x_scale - surface_width) / 2;
}
if (axis_value)
{
if (axis_info.use == GDK_AXIS_X)
*axis_value = x_offset + x_scale * (value - x_min);
else
*axis_value = y_offset + y_scale * (value - y_min);
}
return TRUE;
}
gboolean
_gdk_device_translate_screen_coord (GdkDevice *device,
GdkSurface *surface,
double surface_root_x,
double surface_root_y,
double screen_width,
double screen_height,
guint index_,
double value,
double *axis_value)
{
GdkAxisInfo axis_info;
double axis_width, scale, offset;
if (index_ >= device->axes->len)
return FALSE;
axis_info = g_array_index (device->axes, GdkAxisInfo, index_);
if (axis_info.use != GDK_AXIS_X &&
axis_info.use != GDK_AXIS_Y)
return FALSE;
axis_width = axis_info.max_value - axis_info.min_value;
if (axis_info.use == GDK_AXIS_X)
{
if (axis_width > 0)
scale = screen_width / axis_width;
else
scale = 1;
offset = - surface_root_x;
}
else
{
if (axis_width > 0)
scale = screen_height / axis_width;
else
scale = 1;
offset = - surface_root_y;
}
if (axis_value)
*axis_value = offset + scale * (value - axis_info.min_value);
return TRUE;
}
gboolean
_gdk_device_translate_axis (GdkDevice *device,
guint index_,
double value,
double *axis_value)
{
GdkAxisInfo axis_info;
double axis_width, out;
if (index_ >= device->axes->len)
return FALSE;
axis_info = g_array_index (device->axes, GdkAxisInfo, index_);
if (axis_info.use == GDK_AXIS_X ||
axis_info.use == GDK_AXIS_Y)
return FALSE;
axis_width = axis_info.max_value - axis_info.min_value;
out = (axis_info.max_axis * (value - axis_info.min_value) +
axis_info.min_axis * (axis_info.max_value - value)) / axis_width;
if (axis_value)
*axis_value = out;
return TRUE;
}
void
_gdk_device_query_state (GdkDevice *device,
GdkSurface *surface,
GdkSurface **child_surface,
double *win_x,
double *win_y,
GdkModifierType *mask)
{
GDK_DEVICE_GET_CLASS (device)->query_state (device,
surface,
child_surface,
win_x,
win_y,
mask);
}
GdkSurface *
_gdk_device_surface_at_position (GdkDevice *device,
double *win_x,
double *win_y,
GdkModifierType *mask)
{
return GDK_DEVICE_GET_CLASS (device)->surface_at_position (device,
win_x,
win_y,
mask);
}
/**
* gdk_device_get_vendor_id:
* @device: a physical #GdkDevice
*
* Returns the vendor ID of this device, or %NULL if this information couldn't
* be obtained. This ID is retrieved from the device, and is thus constant for
* it.
*
* This function, together with gdk_device_get_product_id(), can be used to eg.
* compose #GSettings paths to store settings for this device.
*
* |[<!-- language="C" -->
* static GSettings *
* get_device_settings (GdkDevice *device)
* {
* const char *vendor, *product;
* GSettings *settings;
* GdkDevice *device;
* char *path;
*
* vendor = gdk_device_get_vendor_id (device);
* product = gdk_device_get_product_id (device);
*
* path = g_strdup_printf ("/org/example/app/devices/%s:%s/", vendor, product);
* settings = g_settings_new_with_path (DEVICE_SCHEMA, path);
* g_free (path);
*
* return settings;
* }
* ]|
*
* Returns: (nullable): the vendor ID, or %NULL
*/
const char *
gdk_device_get_vendor_id (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), NULL);
g_return_val_if_fail (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_LOGICAL, NULL);
return device->vendor_id;
}
/**
* gdk_device_get_product_id:
* @device: a physical #GdkDevice
*
* Returns the product ID of this device, or %NULL if this information couldn't
* be obtained. This ID is retrieved from the device, and is thus constant for
* it. See gdk_device_get_vendor_id() for more information.
*
* Returns: (nullable): the product ID, or %NULL
*/
const char *
gdk_device_get_product_id (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), NULL);
g_return_val_if_fail (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_LOGICAL, NULL);
return device->product_id;
}
void
gdk_device_set_seat (GdkDevice *device,
GdkSeat *seat)
{
g_return_if_fail (GDK_IS_DEVICE (device));
g_return_if_fail (!seat || GDK_IS_SEAT (seat));
if (device->seat == seat)
return;
device->seat = seat;
g_object_notify (G_OBJECT (device), "seat");
}
/**
* gdk_device_get_seat:
* @device: A #GdkDevice
*
* Returns the #GdkSeat the device belongs to.
*
* Returns: (transfer none): A #GdkSeat. This memory is owned by GTK+ and
* must not be freed.
**/
GdkSeat *
gdk_device_get_seat (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), NULL);
return device->seat;
}
void
gdk_device_update_tool (GdkDevice *device,
GdkDeviceTool *tool)
{
g_return_if_fail (GDK_IS_DEVICE (device));
g_return_if_fail (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_LOGICAL);
if (g_set_object (&device->last_tool, tool))
{
g_object_notify (G_OBJECT (device), "tool");
g_signal_emit (device, signals[TOOL_CHANGED], 0, tool);
}
}
/**
* gdk_device_get_num_touches:
* @device: a #GdkDevice
*
* Retrieves the number of touch points associated to @device.
*
* Returns: the number of touch points
*/
guint
gdk_device_get_num_touches (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), 0);
return device->num_touches;
}
/**
* gdk_device_get_device_tool:
* @device: a #GdkDevice
*
* Retrieves the #GdkDeviceTool associated to @device.
*
* Returns: (transfer none): the #GdkDeviceTool
*/
GdkDeviceTool *
gdk_device_get_device_tool (GdkDevice *device)
{
g_return_val_if_fail (GDK_IS_DEVICE (device), NULL);
return device->last_tool;
}
/**
* gdk_device_get_caps_lock_state:
* @device: a #GdkDevice
*
* Retrieves whether the Caps Lock modifier of the
* keyboard is locked, if @device is a keyboard device.
*
* Returns: %TRUE if Caps Lock is on for @device
*/
gboolean
gdk_device_get_caps_lock_state (GdkDevice *device)
{
GdkKeymap *keymap = gdk_display_get_keymap (device->display);
if (device->source == GDK_SOURCE_KEYBOARD)
return gdk_keymap_get_caps_lock_state (keymap);
return FALSE;
}
/**
* gdk_device_get_num_lock_state:
* @device: a #GdkDevice
*
* Retrieves whether the Num Lock modifier of the
* keyboard is locked, if @device is a keyboard device.
*
* Returns: %TRUE if Num Lock is on for @device
*/
gboolean
gdk_device_get_num_lock_state (GdkDevice *device)
{
GdkKeymap *keymap = gdk_display_get_keymap (device->display);
if (device->source == GDK_SOURCE_KEYBOARD)
return gdk_keymap_get_num_lock_state (keymap);
return FALSE;
}
/**
* gdk_device_get_scroll_lock_state:
* @device: a #GdkDevice
*
* Retrieves whether the Scroll Lock modifier of the
* keyboard is locked, if @device is a keyboard device.
*
* Returns: %TRUE if Scroll Lock is on for @device
*/
gboolean
gdk_device_get_scroll_lock_state (GdkDevice *device)
{
GdkKeymap *keymap = gdk_display_get_keymap (device->display);
if (device->source == GDK_SOURCE_KEYBOARD)
return gdk_keymap_get_scroll_lock_state (keymap);
return FALSE;
}
/**
* gdk_device_get_modifier_state:
* @device: a #GdkDevice
*
* Retrieves the current modifier state of the keyboard,
* if @device is a keyboard device.
*
* Returns: the current modifier state
*/
GdkModifierType
gdk_device_get_modifier_state (GdkDevice *device)
{
GdkKeymap *keymap = gdk_display_get_keymap (device->display);
if (device->source == GDK_SOURCE_KEYBOARD)
return gdk_keymap_get_modifier_state (keymap);
return 0;
}
/**
* gdk_device_get_direction:
* @device: a #GdkDevice
*
* Returns the direction of effective layout of the keyboard,
* if @device is a keyboard device.
*
* The direction of a layout is the direction of the majority
* of its symbols. See pango_unichar_direction().
*
* Returns: %PANGO_DIRECTION_LTR or %PANGO_DIRECTION_RTL
* if it can determine the direction. %PANGO_DIRECTION_NEUTRAL
* otherwise
*/
PangoDirection
gdk_device_get_direction (GdkDevice *device)
{
GdkKeymap *keymap = gdk_display_get_keymap (device->display);
if (device->source == GDK_SOURCE_KEYBOARD)
return gdk_keymap_get_direction (keymap);
return PANGO_DIRECTION_NEUTRAL;
}
/**
* gdk_device_has_bidi_layouts:
* @device: a #GdkDevice
*
* Determines if keyboard layouts for both right-to-left and
* left-to-right languages are in use on the keyboard, if
* @device is a keyboard device.
*
* Returns: %TRUE if there are layouts with both directions,
* %FALSE otherwise
*/
gboolean
gdk_device_has_bidi_layouts (GdkDevice *device)
{
GdkKeymap *keymap = gdk_display_get_keymap (device->display);
if (device->source == GDK_SOURCE_KEYBOARD)
return gdk_keymap_have_bidi_layouts (keymap);
return FALSE;
}
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