gdk_device_get_name ()

const char *
gdk_device_get_name (GdkDevice *device);

Determines the name of the device, suitable for showing in a user interface.

gdk_device_get_vendor_id ()

const char *
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.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

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;
}

gdk_device_get_product_id ()

const char *
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.

gdk_device_get_source ()

GdkInputSource
gdk_device_get_source (GdkDevice *device);

Determines the type of the device.

gdk_device_get_display ()

GdkDisplay *
gdk_device_get_display (GdkDevice *device);

Returns the GdkDisplay to which device pertains.

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.

gdk_device_get_seat ()

GdkSeat *
gdk_device_get_seat (GdkDevice *device);

Returns the GdkSeat the device belongs to.

gdk_device_get_num_touches ()

guint
gdk_device_get_num_touches (GdkDevice *device);

Retrieves the number of touch points associated to device .

gdk_device_get_device_tool ()

GdkDeviceTool *
gdk_device_get_device_tool (GdkDevice *device);

Retrieves the GdkDeviceTool associated to device .

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.

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().

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.

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.

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.

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.

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).

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.

gdk_device_tool_get_tool_type ()

GdkDeviceToolType
gdk_device_tool_get_tool_type (GdkDeviceTool *tool);

Gets the GdkDeviceToolType of the tool.

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.

gdk_device_tool_get_axes ()

GdkAxisFlags
gdk_device_tool_get_axes (GdkDeviceTool *tool);

Gets the axes of the tool.

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.

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.

enum GdkAxisFlags

Flags describing the current capabilities of a device/tool.

GdkDeviceTool

typedef struct _GdkDeviceTool GdkDeviceTool;

A physical tool associated to a GdkDevice.

enum GdkDeviceToolType

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

struct GdkTimeCoord

struct GdkTimeCoord {
  guint32 time;
  GdkAxisFlags flags;
  double axes[GDK_AXIS_LAST];
};

A GdkTimeCoord stores a single event in a motion history.

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.

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”                     char *

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”               char *

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 “vendor-id” property

  “vendor-id”                char *

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

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 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.

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.

Flags: Run Last