GdkDevice

GdkDevice — Object representing an input device

Properties

GdkDevice * associated-device Read
GdkAxisFlags axes Read
gboolean caps-lock-state Read
PangoDirection direction Read
GdkDisplay * display Read / Write / Construct Only
gboolean has-bidi-layouts Read
gboolean has-cursor Read / Write / Construct Only
GdkModifierType modifier-state Read
guint n-axes Read
gchar * name Read / Write / Construct Only
gboolean num-lock-state Read
guint num-touches Read / Write / Construct Only
gchar * product-id Read / Write / Construct Only
gboolean scroll-lock-state Read
GdkSeat * seat Read / Write
GdkInputSource source Read / Write / Construct Only
GdkDeviceTool * tool Read
GdkDeviceType type Read / Write / Construct Only
gchar * vendor-id Read / Write / Construct Only
GdkAxisFlags axes Read / Write / Construct Only
guint64 hardware-id Read / Write / Construct Only
guint64 serial Read / Write / Construct Only
GdkDeviceToolType tool-type Read / Write / Construct Only

Signals

void changed Run Last
void tool-changed Run Last

Object Hierarchy

    GObject
    ├── GdkDevice
    ╰── GdkDeviceTool

Known Derived Interfaces

GdkDevice is required by GdkDevicePad.

Includes

#include <gdk/gdk.h>

Description

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 master and slave devices, and their relationships.

Functions

gdk_device_get_name ()

const gchar *
gdk_device_get_name (GdkDevice *device);

Determines the name of the device.

Parameters

device

a GdkDevice

 

Returns

a name


gdk_device_get_vendor_id ()

const gchar *
gdk_device_get_vendor_id (GdkDevice *device);

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.

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static GSettings *
get_device_settings (GdkDevice *device)
{
  const gchar *vendor, *product;
  GSettings *settings;
  GdkDevice *device;
  gchar *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;
}

Parameters

device

a slave GdkDevice

 

Returns

the vendor ID, or NULL.

[nullable]


gdk_device_get_product_id ()

const gchar *
gdk_device_get_product_id (GdkDevice *device);

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.

Parameters

device

a slave GdkDevice

 

Returns

the product ID, or NULL.

[nullable]


gdk_device_get_source ()

GdkInputSource
gdk_device_get_source (GdkDevice *device);

Determines the type of the device.

Parameters

device

a GdkDevice

 

Returns

a GdkInputSource


gdk_device_set_key ()

void
gdk_device_set_key (GdkDevice *device,
                    guint index_,
                    guint keyval,
                    GdkModifierType modifiers);

Specifies the X key event to generate when a macro button of a device is pressed.

Parameters

device

a GdkDevice

 

index_

the index of the macro button to set

 

keyval

the keyval to generate

 

modifiers

the modifiers to set

 

gdk_device_get_key ()

gboolean
gdk_device_get_key (GdkDevice *device,
                    guint index_,
                    guint *keyval,
                    GdkModifierType *modifiers);

If index_ has a valid keyval, this function will return TRUE and fill in keyval and modifiers with the keyval settings.

Parameters

device

a GdkDevice.

 

index_

the index of the macro button to get.

 

keyval

return value for the keyval.

[out]

modifiers

return value for modifiers.

[out]

Returns

TRUE if keyval is set for index .


gdk_device_set_axis_use ()

void
gdk_device_set_axis_use (GdkDevice *device,
                         guint index_,
                         GdkAxisUse use);

Specifies how an axis of a device is used.

Parameters

device

a pointer GdkDevice

 

index_

the index of the axis

 

use

specifies how the axis is used

 

gdk_device_get_axis_use ()

GdkAxisUse
gdk_device_get_axis_use (GdkDevice *device,
                         guint index_);

Returns the axis use for index_ .

Parameters

device

a pointer GdkDevice.

 

index_

the index of the axis.

 

Returns

a GdkAxisUse specifying how the axis is used.


gdk_device_get_associated_device ()

GdkDevice *
gdk_device_get_associated_device (GdkDevice *device);

Returns the associated device to device , if device is of type GDK_DEVICE_TYPE_MASTER, it will return the paired pointer or keyboard.

If device is of type GDK_DEVICE_TYPE_SLAVE, it will return the master 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.

Parameters

device

a GdkDevice

 

Returns

The associated device, or NULL.

[nullable][transfer none]


gdk_device_list_slave_devices ()

GList *
gdk_device_list_slave_devices (GdkDevice *device);

If the device if of type GDK_DEVICE_TYPE_MASTER, it will return the list of slave devices attached to it, otherwise it will return NULL

Parameters

device

a GdkDevice

 

Returns

the list of slave devices, or NULL. The list must be freed with g_list_free(), the contents of the list are owned by GTK+ and should not be freed.

[nullable][transfer container][element-type GdkDevice]


gdk_device_get_device_type ()

GdkDeviceType
gdk_device_get_device_type (GdkDevice *device);

Returns the device type for device .

Parameters

device

a GdkDevice

 

Returns

the GdkDeviceType for device .


gdk_device_get_display ()

GdkDisplay *
gdk_device_get_display (GdkDevice *device);

Returns the GdkDisplay to which device pertains.

Parameters

device

a GdkDevice

 

Returns

a GdkDisplay. This memory is owned by GTK+, and must not be freed or unreffed.

[transfer none]


gdk_device_get_has_cursor ()

gboolean
gdk_device_get_has_cursor (GdkDevice *device);

Determines whether the pointer follows device motion. This is not meaningful for keyboard devices, which don't have a pointer.

Parameters

device

a GdkDevice

 

Returns

TRUE if the pointer follows device motion


gdk_device_get_n_axes ()

gint
gdk_device_get_n_axes (GdkDevice *device);

Returns the number of axes the device currently has.

Parameters

device

a pointer GdkDevice

 

Returns

the number of axes.


gdk_device_get_n_keys ()

gint
gdk_device_get_n_keys (GdkDevice *device);

Returns the number of keys the device currently has.

Parameters

device

a GdkDevice

 

Returns

the number of keys.


gdk_device_get_axes ()

GdkAxisFlags
gdk_device_get_axes (GdkDevice *device);

Returns the axes currently available on the device.

Parameters

device

a GdkDevice

 

gdk_device_get_seat ()

GdkSeat *
gdk_device_get_seat (GdkDevice *device);

Returns the GdkSeat the device belongs to.

Parameters

device

A GdkDevice

 

Returns

A GdkSeat. This memory is owned by GTK+ and must not be freed.

[transfer none]


gdk_device_get_num_touches ()

guint
gdk_device_get_num_touches (GdkDevice *device);

Retrieves the number of touch points associated to device .

Parameters

device

a GdkDevice

 

Returns

the number of touch points


gdk_device_get_device_tool ()

GdkDeviceTool *
gdk_device_get_device_tool (GdkDevice *device);

Retrieves the GdkDeviceTool associated to device .

Parameters

device

a GdkDevice

 

Returns

the GdkDeviceTool.

[transfer none]


gdk_device_get_caps_lock_state ()

gboolean
gdk_device_get_caps_lock_state (GdkDevice *device);

Retrieves whether the Caps Lock modifier of the keyboard is locked, if device is a keyboard device.

Parameters

device

a GdkDevice

 

Returns

TRUE if Caps Lock is on for device


gdk_device_get_direction ()

PangoDirection
gdk_device_get_direction (GdkDevice *device);

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().

Parameters

device

a GdkDevice

 

Returns

PANGO_DIRECTION_LTR or PANGO_DIRECTION_RTL if it can determine the direction. PANGO_DIRECTION_NEUTRAL otherwise


gdk_device_get_modifier_state ()

GdkModifierType
gdk_device_get_modifier_state (GdkDevice *device);

Retrieves the current modifier state of the keyboard, if device is a keyboard device.

Parameters

device

a GdkDevice

 

Returns

the current modifier state


gdk_device_get_num_lock_state ()

gboolean
gdk_device_get_num_lock_state (GdkDevice *device);

Retrieves whether the Num Lock modifier of the keyboard is locked, if device is a keyboard device.

Parameters

device

a GdkDevice

 

Returns

TRUE if Num Lock is on for device


gdk_device_get_scroll_lock_state ()

gboolean
gdk_device_get_scroll_lock_state (GdkDevice *device);

Retrieves whether the Scroll Lock modifier of the keyboard is locked, if device is a keyboard device.

Parameters

device

a GdkDevice

 

Returns

TRUE if Scroll Lock is on for device


gdk_device_has_bidi_layouts ()

gboolean
gdk_device_has_bidi_layouts (GdkDevice *device);

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.

Parameters

device

a GdkDevice

 

Returns

TRUE if there are layouts with both directions, FALSE otherwise


gdk_device_get_state ()

void
gdk_device_get_state (GdkDevice *device,
                      GdkSurface *surface,
                      gdouble *axes,
                      GdkModifierType *mask);

Gets the current state of a pointer device relative to surface . As a slave device’s coordinates are those of its master pointer, this function may not be called on devices of type GDK_DEVICE_TYPE_SLAVE, unless there is an ongoing grab on them. See gdk_seat_grab().

[skip]

Parameters

device

a GdkDevice.

 

surface

a GdkSurface.

 

axes

an array of doubles to store the values of the axes of device in, or NULL.

[nullable][array]

mask

location to store the modifiers, or NULL.

[optional][out]

gdk_device_get_surface_at_position ()

GdkSurface *
gdk_device_get_surface_at_position (GdkDevice *device,
                                    double *win_x,
                                    double *win_y);

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 slave device coordinates are those of its master pointer, This function may not be called on devices of type GDK_DEVICE_TYPE_SLAVE, unless there is an ongoing grab on them, see gdk_seat_grab().

Parameters

device

pointer GdkDevice to query info to.

 

win_x

return location for the X coordinate of the device location, relative to the surface origin, or NULL.

[out][allow-none]

win_y

return location for the Y coordinate of the device location, relative to the surface origin, or NULL.

[out][allow-none]

Returns

the GdkSurface under the device position, or NULL.

[nullable][transfer none]


gdk_device_get_history ()

gboolean
gdk_device_get_history (GdkDevice *device,
                        GdkSurface *surface,
                        guint32 start,
                        guint32 stop,
                        GdkTimeCoord ***events,
                        gint *n_events);

Obtains the motion history for a pointer device; given a starting and ending timestamp, return all events in the motion history for the device in the given range of time. Some windowing systems do not support motion history, in which case, FALSE will be returned. (This is not distinguishable from the case where motion history is supported and no events were found.)

Note that there is also gdk_surface_set_event_compression() to get more motion events delivered directly, independent of the windowing system.

[skip]

Parameters

device

a GdkDevice

 

surface

the surface with respect to which the event coordinates will be reported

 

start

starting timestamp for range of events to return

 

stop

ending timestamp for the range of events to return

 

events

location to store a newly-allocated array of GdkTimeCoord, or NULL.

[array length=n_events][out][transfer full][optional]

n_events

location to store the length of events , or NULL.

[out][optional]

Returns

TRUE if the windowing system supports motion history and at least one event was found.


gdk_device_free_history ()

void
gdk_device_free_history (GdkTimeCoord **events,
                         gint n_events);

Frees an array of GdkTimeCoord that was returned by gdk_device_get_history().

[skip]

Parameters

events

an array of GdkTimeCoord.

[array length=n_events]

n_events

the length of the array.

 

gdk_device_get_axis ()

gboolean
gdk_device_get_axis (GdkDevice *device,
                     gdouble *axes,
                     GdkAxisUse use,
                     gdouble *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.

[skip]

Parameters

device

a GdkDevice

 

axes

pointer to an array of axes.

[array]

use

the use to look for

 

value

location to store the found value.

[out]

Returns

TRUE if the given axis use was found, otherwise FALSE


gdk_device_get_axis_names ()

char **
gdk_device_get_axis_names (GdkDevice *device);

Returns a null-terminated array of strings, containing the labels for the axes that device currently has. If the device has no axes, NULL is returned.

Parameters

device

a GdkDevice

 

Returns

A null-terminated string array, free with g_strfreev().

[nullable][transfer full]


gdk_device_get_axis_value ()

gboolean
gdk_device_get_axis_value (GdkDevice *device,
                           gdouble *axes,
                           const char *axis_label,
                           gdouble *value);

Interprets an array of double as axis values for a given device, and locates the value in the array for a given axis label, as returned by gdk_device_get_axes()

[skip]

Parameters

device

a pointer GdkDevice.

 

axes

pointer to an array of axes.

[array]

axis_label

name of the label

 

value

location to store the found value.

[out]

Returns

TRUE if the given axis use was found, otherwise FALSE.


gdk_device_get_last_event_surface ()

GdkSurface *
gdk_device_get_last_event_surface (GdkDevice *device);

Gets information about which surface the given pointer device is in, based on events that have been received so far from the display server. If another application has a pointer grab, or this application has a grab with owner_events = FALSE, NULL may be returned even if the pointer is physically over one of this application's surfaces.

Parameters

device

a GdkDevice, with a source other than GDK_SOURCE_KEYBOARD

 

Returns

the last surface the device.

[transfer none][allow-none]


gdk_device_tool_get_serial ()

guint64
gdk_device_tool_get_serial (GdkDeviceTool *tool);

Gets the serial of this tool, this value can be used to identify a physical tool (eg. a tablet pen) across program executions.

Parameters

tool

a GdkDeviceTool

 

Returns

The serial ID for this tool


gdk_device_tool_get_tool_type ()

GdkDeviceToolType
gdk_device_tool_get_tool_type (GdkDeviceTool *tool);

Gets the GdkDeviceToolType of the tool.

Parameters

tool

a GdkDeviceTool

 

Returns

The physical type for this tool. This can be used to figure out what sort of pen is being used, such as an airbrush or a pencil.


gdk_device_tool_get_hardware_id ()

guint64
gdk_device_tool_get_hardware_id (GdkDeviceTool *tool);

Gets the hardware ID of this tool, or 0 if it's not known. When non-zero, the identificator is unique for the given tool model, meaning that two identical tools will share the same hardware_id , but will have different serial numbers (see gdk_device_tool_get_serial()).

This is a more concrete (and device specific) method to identify a GdkDeviceTool than gdk_device_tool_get_tool_type(), as a tablet may support multiple devices with the same GdkDeviceToolType, but having different hardware identificators.

Parameters

tool

a GdkDeviceTool

 

Returns

The hardware identificator of this tool.

Types and Values

GdkDevice

typedef struct _GdkDevice GdkDevice;

The GdkDevice struct contains only private fields and should not be accessed directly.


enum GdkInputSource

An enumeration describing the type of an input device in general terms.

Members

GDK_SOURCE_MOUSE

the device is a mouse. (This will be reported for the core pointer, even if it is something else, such as a trackball.)

 

GDK_SOURCE_PEN

the device is a stylus of a graphics tablet or similar device.

 

GDK_SOURCE_ERASER

the device is an eraser. Typically, this would be the other end of a stylus on a graphics tablet.

 

GDK_SOURCE_CURSOR

the device is a graphics tablet “puck” or similar device.

 

GDK_SOURCE_KEYBOARD

the device is a keyboard.

 

GDK_SOURCE_TOUCHSCREEN

the device is a direct-input touch device, such as a touchscreen or tablet. This device type has been added in 3.4.

 

GDK_SOURCE_TOUCHPAD

the device is an indirect touch device, such as a touchpad. This device type has been added in 3.4.

 

GDK_SOURCE_TRACKPOINT

the device is a trackpoint. This device type has been added in 3.22

 

GDK_SOURCE_TABLET_PAD

the device is a "pad", a collection of buttons, rings and strips found in drawing tablets. This device type has been added in 3.22.

 

enum GdkAxisUse

An enumeration describing the way in which a device axis (valuator) maps onto the predefined valuator types that GTK understands.

Note that the X and Y axes are not really needed; pointer devices report their location via the x/y members of events regardless. Whether X and Y are present as axes depends on the GDK backend.

Members

GDK_AXIS_IGNORE

the axis is ignored.

 

GDK_AXIS_X

the axis is used as the x axis.

 

GDK_AXIS_Y

the axis is used as the y axis.

 

GDK_AXIS_PRESSURE

the axis is used for pressure information.

 

GDK_AXIS_XTILT

the axis is used for x tilt information.

 

GDK_AXIS_YTILT

the axis is used for y tilt information.

 

GDK_AXIS_WHEEL

the axis is used for wheel information.

 

GDK_AXIS_DISTANCE

the axis is used for pen/tablet distance information

 

GDK_AXIS_ROTATION

the axis is used for pen rotation information

 

GDK_AXIS_SLIDER

the axis is used for pen slider information

 

GDK_AXIS_LAST

a constant equal to the numerically highest axis value.

 

enum GdkAxisFlags

Flags describing the current capabilities of a device/tool.

Members

GDK_AXIS_FLAG_X

X axis is present

 

GDK_AXIS_FLAG_Y

Y axis is present

 

GDK_AXIS_FLAG_PRESSURE

Pressure axis is present

 

GDK_AXIS_FLAG_XTILT

X tilt axis is present

 

GDK_AXIS_FLAG_YTILT

Y tilt axis is present

 

GDK_AXIS_FLAG_WHEEL

Wheel axis is present

 

GDK_AXIS_FLAG_DISTANCE

Distance axis is present

 

GDK_AXIS_FLAG_ROTATION

Z-axis rotation is present

 

GDK_AXIS_FLAG_SLIDER

Slider axis is present

 

GdkDeviceTool

typedef struct _GdkDeviceTool GdkDeviceTool;

enum GdkDeviceToolType

Indicates the specific type of tool being used being a tablet. Such as an airbrush, pencil, etc.

Members

GDK_DEVICE_TOOL_TYPE_UNKNOWN

Tool is of an unknown type.

 

GDK_DEVICE_TOOL_TYPE_PEN

Tool is a standard tablet stylus.

 

GDK_DEVICE_TOOL_TYPE_ERASER

Tool is standard tablet eraser.

 

GDK_DEVICE_TOOL_TYPE_BRUSH

Tool is a brush stylus.

 

GDK_DEVICE_TOOL_TYPE_PENCIL

Tool is a pencil stylus.

 

GDK_DEVICE_TOOL_TYPE_AIRBRUSH

Tool is an airbrush stylus.

 

GDK_DEVICE_TOOL_TYPE_MOUSE

Tool is a mouse.

 

GDK_DEVICE_TOOL_TYPE_LENS

Tool is a lens cursor.

 

enum GdkDeviceType

Indicates the device type.

Members

GDK_DEVICE_TYPE_MASTER

Device is a master (or virtual) device. There will be an associated focus indicator on the screen.

 

GDK_DEVICE_TYPE_SLAVE

Device is a slave (or physical) device.

 

GDK_DEVICE_TYPE_FLOATING

Device is a physical device, currently not attached to any seat.

 

struct GdkTimeCoord

struct GdkTimeCoord {
  guint32 time;
  gdouble axes[GDK_MAX_TIMECOORD_AXES];
};

A GdkTimeCoord stores a single event in a motion history.

Members

guint32 time;

The timestamp for this event.

 

gdouble axes[GDK_MAX_TIMECOORD_AXES];

the values of the device’s axes.

 

Property Details

The “associated-device” property

  “associated-device”        GdkDevice *

Associated pointer or keyboard with this device, if any. Devices of type GDK_DEVICE_TYPE_MASTER always come in keyboard/pointer pairs. Other device types will have a NULL associated device.

Owner: GdkDevice

Flags: Read


The “axes” property

  “axes”                     GdkAxisFlags

The axes currently available for this device.

Owner: GdkDevice

Flags: Read


The “caps-lock-state” property

  “caps-lock-state”          gboolean

Whether the keyboard caps lock is on.

Owner: GdkDevice

Flags: Read

Default value: FALSE


The “direction” property

  “direction”                PangoDirection

The direction of the current layout of the keyboard.

Owner: GdkDevice

Flags: Read

Default value: PANGO_DIRECTION_NEUTRAL


The “display” property

  “display”                  GdkDisplay *

The GdkDisplay the GdkDevice pertains to.

Owner: GdkDevice

Flags: Read / Write / Construct Only


The “has-bidi-layouts” property

  “has-bidi-layouts”         gboolean

Whether the keyboard has bidi layouts.

Owner: GdkDevice

Flags: Read

Default value: FALSE


The “has-cursor” property

  “has-cursor”               gboolean

Whether the device is represented by a cursor on the screen. Devices of type GDK_DEVICE_TYPE_MASTER will have TRUE here.

Owner: GdkDevice

Flags: Read / Write / Construct Only

Default value: FALSE


The “modifier-state” property

  “modifier-state”           GdkModifierType

The modifier state of the keyboard.

Owner: GdkDevice

Flags: Read


The “n-axes” property

  “n-axes”                   guint

Number of axes in the device.

Owner: GdkDevice

Flags: Read

Default value: 0


The “name” property

  “name”                     gchar *

The device name.

Owner: GdkDevice

Flags: Read / Write / Construct Only

Default value: NULL


The “num-lock-state” property

  “num-lock-state”           gboolean

Whether the keyboard num lock is on.

Owner: GdkDevice

Flags: Read

Default value: FALSE


The “num-touches” property

  “num-touches”              guint

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.

Owner: GdkDevice

Flags: Read / Write / Construct Only

Default value: 0


The “product-id” property

  “product-id”               gchar *

Product ID of this device, see gdk_device_get_product_id().

Owner: GdkDevice

Flags: Read / Write / Construct Only

Default value: NULL


The “scroll-lock-state” property

  “scroll-lock-state”        gboolean

Whether the keyboard scroll lock is on.

Owner: GdkDevice

Flags: Read

Default value: FALSE


The “seat” property

  “seat”                     GdkSeat *

GdkSeat of this device.

Owner: GdkDevice

Flags: Read / Write


The “source” property

  “source”                   GdkInputSource

Source type for the device.

Owner: GdkDevice

Flags: Read / Write / Construct Only

Default value: GDK_SOURCE_MOUSE


The “tool” property

  “tool”                     GdkDeviceTool *

The tool that is currently used with this device.

Owner: GdkDevice

Flags: Read


The “type” property

  “type”                     GdkDeviceType

Device role in the device manager.

Owner: GdkDevice

Flags: Read / Write / Construct Only

Default value: GDK_DEVICE_TYPE_MASTER


The “vendor-id” property

  “vendor-id”                gchar *

Vendor ID of this device, see gdk_device_get_vendor_id().

Owner: GdkDevice

Flags: Read / Write / Construct Only

Default value: NULL


The “axes” property

  “axes”                     GdkAxisFlags

Tool axes.

Owner: GdkDeviceTool

Flags: Read / Write / Construct Only


The “hardware-id” property

  “hardware-id”              guint64

Hardware ID.

Owner: GdkDeviceTool

Flags: Read / Write / Construct Only

Default value: 0


The “serial” property

  “serial”                   guint64

Serial number.

Owner: GdkDeviceTool

Flags: Read / Write / Construct Only

Default value: 0


The “tool-type” property

  “tool-type”                GdkDeviceToolType

Tool type.

Owner: GdkDeviceTool

Flags: Read / Write / Construct Only

Default value: GDK_DEVICE_TOOL_TYPE_UNKNOWN

Signal Details

The “changed” signal

void
user_function (GdkDevice *device,
               gpointer   user_data)

The ::changed signal is emitted either when the GdkDevice has changed the number of either axes or keys. For example In X this will normally happen when the slave device routing events through the master device changes (for example, user switches from the USB mouse to a tablet), in that case the master device will change to reflect the new slave device axes and keys.

Parameters

device

the GdkDevice that changed.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “tool-changed” signal

void
user_function (GdkDevice     *device,
               GdkDeviceTool *tool,
               gpointer       user_data)

The ::tool-changed signal is emitted on pen/eraser GdkDevices whenever tools enter or leave proximity.

Parameters

device

the GdkDevice that changed.

 

tool

The new current tool

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last

See Also

GdkSeat