Event Structures: GDK 3 Reference Manual

Event Structures

Event Structures — Data structures specific to each type of event

Types and Values

union	GdkEvent
struct	GdkEventAny
struct	GdkEventKey
struct	GdkEventButton
struct	GdkEventTouch
struct	GdkEventScroll
struct	GdkEventMotion
struct	GdkEventExpose
struct	GdkEventVisibility
struct	GdkEventCrossing
struct	GdkEventFocus
struct	GdkEventConfigure
struct	GdkEventProperty
struct	GdkEventSelection
struct	GdkEventDND
struct	GdkEventProximity
struct	GdkEventWindowState
struct	GdkEventSetting
struct	GdkEventOwnerChange
struct	GdkEventGrabBroken
struct	GdkEventTouchpadSwipe
struct	GdkEventTouchpadPinch
struct	GdkEventPadButton
struct	GdkEventPadAxis
struct	GdkEventPadGroupMode
enum	GdkScrollDirection
enum	GdkVisibilityState
enum	GdkCrossingMode
enum	GdkNotifyType
enum	GdkPropertyState
enum	GdkWindowState
enum	GdkSettingAction
enum	GdkOwnerChange

Includes

#include <gdk/gdk.h>

Description

The event structures contain data specific to each type of event in GDK.

A common mistake is to forget to set the event mask of a widget so that the required events are received. See gtk_widget_set_events().

Functions

Types and Values

union GdkEvent

A GdkEvent contains a union of all of the event types, and allows access to the data fields in a number of ways.

The event type is always the first field in all of the event types, and can always be accessed with the following code, no matter what type of event it is:

GdkEvent *event;
GdkEventType type;

type = event->type;

To access other fields of the event, the pointer to the event can be cast to the appropriate event type, or the union member name can be used. For example if the event type is GDK_BUTTON_PRESS then the x coordinate of the button press can be accessed with:

GdkEvent *event;
gdouble x;

x = ((GdkEventButton*)event)->x;

or:

GdkEvent *event;
gdouble x;

x = event->button.x;

Members

GdkEventType `type`;	the GdkEventType
GdkEventAny `any`;	a GdkEventAny
GdkEventExpose `expose`;	a GdkEventExpose
GdkEventVisibility `visibility`;	a GdkEventVisibility
GdkEventMotion `motion`;	a GdkEventMotion
GdkEventButton `button`;	a GdkEventButton
GdkEventTouch `touch`;	a GdkEventTouch
GdkEventScroll `scroll`;	a GdkEventScroll
GdkEventKey `key`;	a GdkEventKey
GdkEventCrossing `crossing`;	a GdkEventCrossing
GdkEventFocus `focus_change`;	a GdkEventFocus
GdkEventConfigure `configure`;	a GdkEventConfigure
GdkEventProperty `property`;	a GdkEventProperty
GdkEventSelection `selection`;	a GdkEventSelection
GdkEventOwnerChange `owner_change`;	a GdkEventOwnerChange
GdkEventProximity `proximity`;	a GdkEventProximity
GdkEventDND `dnd`;	a GdkEventDND
GdkEventWindowState `window_state`;	a GdkEventWindowState
GdkEventSetting `setting`;	a GdkEventSetting
GdkEventGrabBroken `grab_broken`;	a GdkEventGrabBroken
GdkEventTouchpadSwipe `touchpad_swipe`;	a GdkEventTouchpadSwipe
GdkEventTouchpadPinch `touchpad_pinch`;	a GdkEventTouchpadPinch
GdkEventPadButton `pad_button`;	a GdkEventPadButton
GdkEventPadAxis `pad_axis`;	a GdkEventPadAxis
GdkEventPadGroupMode `pad_group_mode`;	a GdkEventPadGroupMode

struct GdkEventAny

struct GdkEventAny {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
};

Contains the fields which are common to all event structs. Any event pointer can safely be cast to a pointer to a GdkEventAny to access these fields.

Members

GdkEventType `type`;	the type of the event.
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.

struct GdkEventKey

struct GdkEventKey {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  guint state;
  guint keyval;
  gint length;
  gchar *string;
  guint16 hardware_keycode;
  guint8 group;
  guint is_modifier : 1;
};

Describes a key press or key release event.

Members

GdkEventType `type`;	the type of the event (`GDK_KEY_PRESS` or `GDK_KEY_RELEASE`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
guint32 `time`;	the time of the event in milliseconds.
guint `state`;	a bit-mask representing the state of the modifier keys (e.g. Control, Shift and Alt) and the pointer buttons. See GdkModifierType.	[type GdkModifierType]
guint `keyval`;	the key that was pressed or released. See the `gdk/gdkkeysyms.h` header file for a complete list of GDK key codes.
gint `length`;	the length of `string` .
gchar *`string`;	a string containing an approximation of the text that would result from this keypress. The only correct way to handle text input of text is using input methods (see GtkIMContext), so this field is deprecated and should never be used. (`gdk_unicode_to_keyval()` provides a non-deprecated way of getting an approximate translation for a key.) The string is encoded in the encoding of the current locale (Note: this for backwards compatibility: strings in GTK+ and GDK are typically in UTF-8.) and NUL-terminated. In some cases, the translation of the key code will be a single NUL byte, in which case looking at `length` is necessary to distinguish it from the an empty translation.
guint16 `hardware_keycode`;	the raw code of the key that was pressed or released.
guint8 `group`;	the keyboard group.
guint `is_modifier` : 1;	a flag that indicates if `hardware_keycode` is mapped to a modifier. Since 2.10

struct GdkEventButton

struct GdkEventButton {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble *axes;
  guint state;
  guint button;
  GdkDevice *device;
  gdouble x_root, y_root;
};

Used for button press and button release events. The type field will be one of GDK_BUTTON_PRESS, GDK_2BUTTON_PRESS, GDK_3BUTTON_PRESS or GDK_BUTTON_RELEASE,

Double and triple-clicks result in a sequence of events being received. For double-clicks the order of events will be:

Note that the first click is received just like a normal button press, while the second click results in a GDK_2BUTTON_PRESS being received just after the GDK_BUTTON_PRESS.

Triple-clicks are very similar to double-clicks, except that GDK_3BUTTON_PRESS is inserted after the third click. The order of the events is:

For a double click to occur, the second button press must occur within 1/4 of a second of the first. For a triple click to occur, the third button press must also occur within 1/2 second of the first button press.

Members

GdkEventType `type`;	the type of the event (`GDK_BUTTON_PRESS`, `GDK_2BUTTON_PRESS`, `GDK_3BUTTON_PRESS` or `GDK_BUTTON_RELEASE`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
guint32 `time`;	the time of the event in milliseconds.
gdouble `x`;	the x coordinate of the pointer relative to the window.
gdouble `y`;	the y coordinate of the pointer relative to the window.
gdouble *`axes`;	`x` , `y` translated to the axes of `device` , or `NULL` if `device` is the mouse.
guint `state`;	a bit-mask representing the state of the modifier keys (e.g. Control, Shift and Alt) and the pointer buttons. See GdkModifierType.	[type GdkModifierType]
guint `button`;	the button which was pressed or released, numbered from 1 to 5. Normally button 1 is the left mouse button, 2 is the middle button, and 3 is the right button. On 2-button mice, the middle button can often be simulated by pressing both mouse buttons together.
GdkDevice *`device`;	the master device that the event originated from. Use `gdk_event_get_source_device()` to get the slave device.
gdouble `x_root`;	the x coordinate of the pointer relative to the root of the screen.
gdouble `y_root`;	the y coordinate of the pointer relative to the root of the screen.

struct GdkEventTouch

struct GdkEventTouch {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble *axes;
  guint state;
  GdkEventSequence *sequence;
  gboolean emulating_pointer;
  GdkDevice *device;
  gdouble x_root, y_root;
};

Used for touch events. type field will be one of GDK_TOUCH_BEGIN, GDK_TOUCH_UPDATE, GDK_TOUCH_END or GDK_TOUCH_CANCEL.

Touch events are grouped into sequences by means of the sequence field, which can also be obtained with gdk_event_get_event_sequence(). Each sequence begins with a GDK_TOUCH_BEGIN event, followed by any number of GDK_TOUCH_UPDATE events, and ends with a GDK_TOUCH_END (or GDK_TOUCH_CANCEL) event. With multitouch devices, there may be several active sequences at the same time.

Members

GdkEventType `type`;	the type of the event (`GDK_TOUCH_BEGIN`, `GDK_TOUCH_UPDATE`, `GDK_TOUCH_END`, `GDK_TOUCH_CANCEL`)
GdkWindow *`window`;	the window which received the event
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
guint32 `time`;	the time of the event in milliseconds.
gdouble `x`;	the x coordinate of the pointer relative to the window
gdouble `y`;	the y coordinate of the pointer relative to the window
gdouble *`axes`;	`x` , `y` translated to the axes of `device` , or `NULL` if `device` is the mouse
guint `state`;	a bit-mask representing the state of the modifier keys (e.g. Control, Shift and Alt) and the pointer buttons. See GdkModifierType.	[type GdkModifierType]
GdkEventSequence *`sequence`;	the event sequence that the event belongs to
gboolean `emulating_pointer`;	whether the event should be used for emulating pointer event
GdkDevice *`device`;	the master device that the event originated from. Use `gdk_event_get_source_device()` to get the slave device.
gdouble `x_root`;	the x coordinate of the pointer relative to the root of the screen
gdouble `y_root`;	the y coordinate of the pointer relative to the root of the screen

struct GdkEventScroll

struct GdkEventScroll {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  guint state;
  GdkScrollDirection direction;
  GdkDevice *device;
  gdouble x_root, y_root;
  gdouble delta_x;
  gdouble delta_y;
  guint is_stop : 1;
};

Generated from button presses for the buttons 4 to 7. Wheel mice are usually configured to generate button press events for buttons 4 and 5 when the wheel is turned.

Some GDK backends can also generate “smooth” scroll events, which can be recognized by the GDK_SCROLL_SMOOTH scroll direction. For these, the scroll deltas can be obtained with gdk_event_get_scroll_deltas().

Members

GdkEventType `type`;	the type of the event (`GDK_SCROLL`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
guint32 `time`;	the time of the event in milliseconds.
gdouble `x`;	the x coordinate of the pointer relative to the window.
gdouble `y`;	the y coordinate of the pointer relative to the window.
guint `state`;	a bit-mask representing the state of the modifier keys (e.g. Control, Shift and Alt) and the pointer buttons. See GdkModifierType.	[type GdkModifierType]
GdkScrollDirection `direction`;	the direction to scroll to (one of `GDK_SCROLL_UP`, `GDK_SCROLL_DOWN`, `GDK_SCROLL_LEFT`, `GDK_SCROLL_RIGHT` or `GDK_SCROLL_SMOOTH`).
GdkDevice *`device`;	the master device that the event originated from. Use `gdk_event_get_source_device()` to get the slave device.
gdouble `x_root`;	the x coordinate of the pointer relative to the root of the screen.
gdouble `y_root`;	the y coordinate of the pointer relative to the root of the screen.
gdouble `delta_x`;	the x coordinate of the scroll delta
gdouble `delta_y`;	the y coordinate of the scroll delta
guint `is_stop` : 1;

struct GdkEventMotion

struct GdkEventMotion {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble *axes;
  guint state;
  gint16 is_hint;
  GdkDevice *device;
  gdouble x_root, y_root;
};

Generated when the pointer moves.

Members

GdkEventType `type`;	the type of the event.
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
guint32 `time`;	the time of the event in milliseconds.
gdouble `x`;	the x coordinate of the pointer relative to the window.
gdouble `y`;	the y coordinate of the pointer relative to the window.
gdouble *`axes`;	`x` , `y` translated to the axes of `device` , or `NULL` if `device` is the mouse.
guint `state`;	a bit-mask representing the state of the modifier keys (e.g. Control, Shift and Alt) and the pointer buttons. See GdkModifierType.	[type GdkModifierType]
gint16 `is_hint`;	set to 1 if this event is just a hint, see the `GDK_POINTER_MOTION_HINT_MASK` value of GdkEventMask.
GdkDevice *`device`;	the master device that the event originated from. Use `gdk_event_get_source_device()` to get the slave device.
gdouble `x_root`;	the x coordinate of the pointer relative to the root of the screen.
gdouble `y_root`;	the y coordinate of the pointer relative to the root of the screen.

struct GdkEventExpose

struct GdkEventExpose {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkRectangle area;
  cairo_region_t *region;
  gint count; /* If non-zero, how many more events follow. */
};

Generated when all or part of a window becomes visible and needs to be redrawn.

Members

GdkEventType `type`;	the type of the event (`GDK_EXPOSE` or `GDK_DAMAGE`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
GdkRectangle `area`;	bounding box of `region` .
cairo_region_t *`region`;	the region that needs to be redrawn.
gint `count`;	the number of contiguous `GDK_EXPOSE` events following this one. The only use for this is “exposure compression”, i.e. handling all contiguous `GDK_EXPOSE` events in one go, though GDK performs some exposure compression so this is not normally needed.

struct GdkEventVisibility

struct GdkEventVisibility {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkVisibilityState state;
};

GdkEventVisibility has been deprecated since version 3.12 and should not be used in newly-written code.

Modern composited windowing systems with pervasive transparency make it impossible to track the visibility of a window reliably, so this event can not be guaranteed to provide useful information.

Generated when the window visibility status has changed.

Members

GdkEventType `type`;	the type of the event (`GDK_VISIBILITY_NOTIFY`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
GdkVisibilityState `state`;	the new visibility state (`GDK_VISIBILITY_FULLY_OBSCURED`, `GDK_VISIBILITY_PARTIAL` or `GDK_VISIBILITY_UNOBSCURED`).

struct GdkEventCrossing

struct GdkEventCrossing {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkWindow *subwindow;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble x_root;
  gdouble y_root;
  GdkCrossingMode mode;
  GdkNotifyType detail;
  gboolean focus;
  guint state;
};

Generated when the pointer enters or leaves a window.

Members

GdkEventType `type`;	the type of the event (`GDK_ENTER_NOTIFY` or `GDK_LEAVE_NOTIFY`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
GdkWindow *`subwindow`;	the window that was entered or left.
guint32 `time`;	the time of the event in milliseconds.
gdouble `x`;	the x coordinate of the pointer relative to the window.
gdouble `y`;	the y coordinate of the pointer relative to the window.
gdouble `x_root`;	the x coordinate of the pointer relative to the root of the screen.
gdouble `y_root`;	the y coordinate of the pointer relative to the root of the screen.
GdkCrossingMode `mode`;	the crossing mode (`GDK_CROSSING_NORMAL`, `GDK_CROSSING_GRAB`, `GDK_CROSSING_UNGRAB`, `GDK_CROSSING_GTK_GRAB`, `GDK_CROSSING_GTK_UNGRAB` or `GDK_CROSSING_STATE_CHANGED`). `GDK_CROSSING_GTK_GRAB`, `GDK_CROSSING_GTK_UNGRAB`, and `GDK_CROSSING_STATE_CHANGED` were added in 2.14 and are always synthesized, never native.
GdkNotifyType `detail`;	the kind of crossing that happened (`GDK_NOTIFY_INFERIOR`, `GDK_NOTIFY_ANCESTOR`, `GDK_NOTIFY_VIRTUAL`, `GDK_NOTIFY_NONLINEAR` or `GDK_NOTIFY_NONLINEAR_VIRTUAL`).
gboolean `focus`;	`TRUE` if `window` is the focus window or an inferior.
guint `state`;	a bit-mask representing the state of the modifier keys (e.g. Control, Shift and Alt) and the pointer buttons. See GdkModifierType.	[type GdkModifierType]

struct GdkEventFocus

struct GdkEventFocus {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  gint16 in;
};

Describes a change of keyboard focus.

Members

GdkEventType `type`;	the type of the event (`GDK_FOCUS_CHANGE`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
gint16 `in`;	`TRUE` if the window has gained the keyboard focus, `FALSE` if it has lost the focus.

struct GdkEventConfigure

struct GdkEventConfigure {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  gint x, y;
  gint width;
  gint height;
};

Generated when a window size or position has changed.

Members

GdkEventType `type`;	the type of the event (`GDK_CONFIGURE`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
gint `x`;	the new x coordinate of the window, relative to its parent.
gint `y`;	the new y coordinate of the window, relative to its parent.
gint `width`;	the new width of the window.
gint `height`;	the new height of the window.

struct GdkEventProperty

struct GdkEventProperty {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkAtom atom;
  guint32 time;
  guint state;
};

Describes a property change on a window.

Members

GdkEventType `type`;	the type of the event (`GDK_PROPERTY_NOTIFY`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
GdkAtom `atom`;	the property that was changed.
guint32 `time`;	the time of the event in milliseconds.
guint `state`;	whether the property was changed (`GDK_PROPERTY_NEW_VALUE`) or deleted (`GDK_PROPERTY_DELETE`).	[type GdkPropertyState]

struct GdkEventSelection

struct GdkEventSelection {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkAtom selection;
  GdkAtom target;
  GdkAtom property;
  guint32 time;
  GdkWindow *requestor;
};

Generated when a selection is requested or ownership of a selection is taken over by another client application.

Members

GdkEventType `type`;	the type of the event (`GDK_SELECTION_CLEAR`, `GDK_SELECTION_NOTIFY` or `GDK_SELECTION_REQUEST`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
GdkAtom `selection`;	the selection.
GdkAtom `target`;	the target to which the selection should be converted.
GdkAtom `property`;	the property in which to place the result of the conversion.
guint32 `time`;	the time of the event in milliseconds.
GdkWindow *`requestor`;	the window on which to place `property` or `NULL` if none.

struct GdkEventDND

struct GdkEventDND {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkDragContext *context;

  guint32 time;
  gshort x_root, y_root;
};

Generated during DND operations.

Members

GdkEventType `type`;	the type of the event (`GDK_DRAG_ENTER`, `GDK_DRAG_LEAVE`, `GDK_DRAG_MOTION`, `GDK_DRAG_STATUS`, `GDK_DROP_START` or `GDK_DROP_FINISHED`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
GdkDragContext *`context`;	the GdkDragContext for the current DND operation.
guint32 `time`;	the time of the event in milliseconds.
gshort `x_root`;	the x coordinate of the pointer relative to the root of the screen, only set for `GDK_DRAG_MOTION` and `GDK_DROP_START`.
gshort `y_root`;	the y coordinate of the pointer relative to the root of the screen, only set for `GDK_DRAG_MOTION` and `GDK_DROP_START`.

struct GdkEventProximity

struct GdkEventProximity {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  GdkDevice *device;
};

Proximity events are generated when using GDK’s wrapper for the XInput extension. The XInput extension is an add-on for standard X that allows you to use nonstandard devices such as graphics tablets. A proximity event indicates that the stylus has moved in or out of contact with the tablet, or perhaps that the user’s finger has moved in or out of contact with a touch screen.

This event type will be used pretty rarely. It only is important for XInput aware programs that are drawing their own cursor.

Members

GdkEventType `type`;	the type of the event (`GDK_PROXIMITY_IN` or `GDK_PROXIMITY_OUT`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
guint32 `time`;	the time of the event in milliseconds.
GdkDevice *`device`;	the master device that the event originated from. Use `gdk_event_get_source_device()` to get the slave device.

struct GdkEventWindowState

struct GdkEventWindowState {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkWindowState changed_mask;
  GdkWindowState new_window_state;
};

Generated when the state of a toplevel window changes.

Members

GdkEventType `type`;	the type of the event (`GDK_WINDOW_STATE`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
GdkWindowState `changed_mask`;	mask specifying what flags have changed.
GdkWindowState `new_window_state`;	the new window state, a combination of GdkWindowState bits.

struct GdkEventSetting

struct GdkEventSetting {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkSettingAction action;
  char *name;
};

Generated when a setting is modified.

Members

GdkEventType `type`;	the type of the event (`GDK_SETTING`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
GdkSettingAction `action`;	what happened to the setting (`GDK_SETTING_ACTION_NEW`, `GDK_SETTING_ACTION_CHANGED` or `GDK_SETTING_ACTION_DELETED`).
char *`name`;	the name of the setting.

struct GdkEventOwnerChange

struct GdkEventOwnerChange {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkWindow *owner;
  GdkOwnerChange reason;
  GdkAtom selection;
  guint32 time;
  guint32 selection_time;
};

Generated when the owner of a selection changes. On X11, this information is only available if the X server supports the XFIXES extension.

Members

GdkEventType `type`;	the type of the event (`GDK_OWNER_CHANGE`).
GdkWindow *`window`;	the window which received the event
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
GdkWindow *`owner`;	the new owner of the selection, or `NULL` if there is none
GdkOwnerChange `reason`;	the reason for the ownership change as a GdkOwnerChange value
GdkAtom `selection`;	the atom identifying the selection
guint32 `time`;	the timestamp of the event
guint32 `selection_time`;	the time at which the selection ownership was taken over

Since: 2.6

struct GdkEventGrabBroken

struct GdkEventGrabBroken {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  gboolean keyboard;
  gboolean implicit;
  GdkWindow *grab_window;
};

Generated when a pointer or keyboard grab is broken. On X11, this happens when the grab window becomes unviewable (i.e. it or one of its ancestors is unmapped), or if the same application grabs the pointer or keyboard again. Note that implicit grabs (which are initiated by button presses) can also cause GdkEventGrabBroken events.

Members

GdkEventType `type`;	the type of the event (`GDK_GRAB_BROKEN`)
GdkWindow *`window`;	the window which received the event, i.e. the window that previously owned the grab
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
gboolean `keyboard`;	`TRUE` if a keyboard grab was broken, `FALSE` if a pointer grab was broken
gboolean `implicit`;	`TRUE` if the broken grab was implicit
GdkWindow *`grab_window`;	If this event is caused by another grab in the same application, `grab_window` contains the new grab window. Otherwise `grab_window` is `NULL`.

Since: 2.8

struct GdkEventTouchpadSwipe

struct GdkEventTouchpadSwipe {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  gint8 phase;
  gint8 n_fingers;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble dx;
  gdouble dy;
  gdouble x_root, y_root;
  guint state;
};

Generated during touchpad swipe gestures.

Members

GdkEventType `type`;	the type of the event (`GDK_TOUCHPAD_SWIPE`)
GdkWindow *`window`;	the window which received the event
gint8 `send_event`;	`TRUE` if the event was sent explicitly
gint8 `phase`;	the current phase of the gesture
gint8 `n_fingers`;	The number of fingers triggering the swipe
guint32 `time`;	the time of the event in milliseconds
gdouble `x`;	The X coordinate of the pointer
gdouble `y`;	The Y coordinate of the pointer
gdouble `dx`;	Movement delta in the X axis of the swipe focal point
gdouble `dy`;	Movement delta in the Y axis of the swipe focal point
gdouble `x_root`;	The X coordinate of the pointer, relative to the root of the screen.
gdouble `y_root`;	The Y coordinate of the pointer, relative to the root of the screen.
guint `state`;	a bit-mask representing the state of the modifier keys (e.g. Control, Shift and Alt) and the pointer buttons. See GdkModifierType.	[type GdkModifierType]

struct GdkEventTouchpadPinch

struct GdkEventTouchpadPinch {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  gint8 phase;
  gint8 n_fingers;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble dx;
  gdouble dy;
  gdouble angle_delta;
  gdouble scale;
  gdouble x_root, y_root;
  guint state;
};

Generated during touchpad swipe gestures.

Members

GdkEventType `type`;	the type of the event (`GDK_TOUCHPAD_PINCH`)
GdkWindow *`window`;	the window which received the event
gint8 `send_event`;	`TRUE` if the event was sent explicitly
gint8 `phase`;	the current phase of the gesture
gint8 `n_fingers`;	The number of fingers triggering the pinch
guint32 `time`;	the time of the event in milliseconds
gdouble `x`;	The X coordinate of the pointer
gdouble `y`;	The Y coordinate of the pointer
gdouble `dx`;	Movement delta in the X axis of the swipe focal point
gdouble `dy`;	Movement delta in the Y axis of the swipe focal point
gdouble `angle_delta`;	The angle change in radians, negative angles denote counter-clockwise movements
gdouble `scale`;	The current scale, relative to that at the time of the corresponding `GDK_TOUCHPAD_GESTURE_PHASE_BEGIN` event
gdouble `x_root`;	The X coordinate of the pointer, relative to the root of the screen.
gdouble `y_root`;	The Y coordinate of the pointer, relative to the root of the screen.
guint `state`;	a bit-mask representing the state of the modifier keys (e.g. Control, Shift and Alt) and the pointer buttons. See GdkModifierType.	[type GdkModifierType]

struct GdkEventPadButton

struct GdkEventPadButton {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  guint group;
  guint button;
  guint mode;
};

Generated during GDK_SOURCE_TABLET_PAD button presses and releases.

Members

GdkEventType `type`;	the type of the event (`GDK_PAD_BUTTON_PRESS` or `GDK_PAD_BUTTON_RELEASE`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
guint32 `time`;	the time of the event in milliseconds.
guint `group`;	the pad group the button belongs to. A `GDK_SOURCE_TABLET_PAD` device may have one or more groups containing a set of buttons/rings/strips each.
guint `button`;	The pad button that was pressed.
guint `mode`;	The current mode of `group` . Different groups in a `GDK_SOURCE_TABLET_PAD` device may have different current modes.

Since: 3.22

struct GdkEventPadAxis

struct GdkEventPadAxis {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  guint group;
  guint index;
  guint mode;
  gdouble value;
};

Generated during GDK_SOURCE_TABLET_PAD interaction with tactile sensors.

Members

GdkEventType `type`;	the type of the event (`GDK_PAD_RING` or `GDK_PAD_STRIP`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
guint32 `time`;	the time of the event in milliseconds.
guint `group`;	the pad group the ring/strip belongs to. A `GDK_SOURCE_TABLET_PAD` device may have one or more groups containing a set of buttons/rings/strips each.
guint `index`;	number of strip/ring that was interacted. This number is 0-indexed.
guint `mode`;	The current mode of `group` . Different groups in a `GDK_SOURCE_TABLET_PAD` device may have different current modes.
gdouble `value`;	The current value for the given axis.

Since: 3.22

struct GdkEventPadGroupMode

struct GdkEventPadGroupMode {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  guint group;
  guint mode;
};

Generated during GDK_SOURCE_TABLET_PAD mode switches in a group.

Members

GdkEventType `type`;	the type of the event (`GDK_PAD_GROUP_MODE`).
GdkWindow *`window`;	the window which received the event.
gint8 `send_event`;	`TRUE` if the event was sent explicitly.
guint32 `time`;	the time of the event in milliseconds.
guint `group`;	the pad group that is switching mode. A `GDK_SOURCE_TABLET_PAD` device may have one or more groups containing a set of buttons/rings/strips each.
guint `mode`;	The new mode of `group` . Different groups in a `GDK_SOURCE_TABLET_PAD` device may have different current modes.

Since: 3.22

enum GdkScrollDirection

Specifies the direction for GdkEventScroll.

Members

GDK_SCROLL_UP	the window is scrolled up.
GDK_SCROLL_DOWN	the window is scrolled down.
GDK_SCROLL_LEFT	the window is scrolled to the left.
GDK_SCROLL_RIGHT	the window is scrolled to the right.
GDK_SCROLL_SMOOTH	the scrolling is determined by the delta values in GdkEventScroll. See `gdk_event_get_scroll_deltas()`. Since: 3.4

enum GdkVisibilityState

Specifies the visiblity status of a window for a GdkEventVisibility.

Members

GDK_VISIBILITY_UNOBSCURED	the window is completely visible.
GDK_VISIBILITY_PARTIAL	the window is partially visible.
GDK_VISIBILITY_FULLY_OBSCURED	the window is not visible at all.

enum GdkCrossingMode

Specifies the crossing mode for GdkEventCrossing.

Members

GDK_CROSSING_NORMAL	crossing because of pointer motion.
GDK_CROSSING_GRAB	crossing because a grab is activated.
GDK_CROSSING_UNGRAB	crossing because a grab is deactivated.
GDK_CROSSING_GTK_GRAB	crossing because a GTK+ grab is activated.
GDK_CROSSING_GTK_UNGRAB	crossing because a GTK+ grab is deactivated.
GDK_CROSSING_STATE_CHANGED	crossing because a GTK+ widget changed state (e.g. sensitivity).
GDK_CROSSING_TOUCH_BEGIN	crossing because a touch sequence has begun, this event is synthetic as the pointer might have not left the window.
GDK_CROSSING_TOUCH_END	crossing because a touch sequence has ended, this event is synthetic as the pointer might have not left the window.
GDK_CROSSING_DEVICE_SWITCH	crossing because of a device switch (i.e. a mouse taking control of the pointer after a touch device), this event is synthetic as the pointer didn’t leave the window.

enum GdkNotifyType

Specifies the kind of crossing for GdkEventCrossing.

See the X11 protocol specification of LeaveNotify for full details of crossing event generation.

Members

GDK_NOTIFY_ANCESTOR	the window is entered from an ancestor or left towards an ancestor.
GDK_NOTIFY_VIRTUAL	the pointer moves between an ancestor and an inferior of the window.
GDK_NOTIFY_INFERIOR	the window is entered from an inferior or left towards an inferior.
GDK_NOTIFY_NONLINEAR	the window is entered from or left towards a window which is neither an ancestor nor an inferior.
GDK_NOTIFY_NONLINEAR_VIRTUAL	the pointer moves between two windows which are not ancestors of each other and the window is part of the ancestor chain between one of these windows and their least common ancestor.
GDK_NOTIFY_UNKNOWN	an unknown type of enter/leave event occurred.

enum GdkPropertyState

Specifies the type of a property change for a GdkEventProperty.

Members

GDK_PROPERTY_NEW_VALUE	the property value was changed.
GDK_PROPERTY_DELETE	the property was deleted.

enum GdkWindowState

Specifies the state of a toplevel window.

Members

GDK_WINDOW_STATE_WITHDRAWN	the window is not shown.
GDK_WINDOW_STATE_ICONIFIED	the window is minimized.
GDK_WINDOW_STATE_MAXIMIZED	the window is maximized.
GDK_WINDOW_STATE_STICKY	the window is sticky.
GDK_WINDOW_STATE_FULLSCREEN	the window is maximized without decorations.
GDK_WINDOW_STATE_ABOVE	the window is kept above other windows.
GDK_WINDOW_STATE_BELOW	the window is kept below other windows.
GDK_WINDOW_STATE_FOCUSED	the window is presented as focused (with active decorations).
GDK_WINDOW_STATE_TILED	the window is in a tiled state, Since 3.10. Since 3.22.23, this is deprecated in favor of per-edge information.
GDK_WINDOW_STATE_TOP_TILED	whether the top edge is tiled, Since 3.22.23
GDK_WINDOW_STATE_TOP_RESIZABLE	whether the top edge is resizable, Since 3.22.23
GDK_WINDOW_STATE_RIGHT_TILED	whether the right edge is tiled, Since 3.22.23
GDK_WINDOW_STATE_RIGHT_RESIZABLE	whether the right edge is resizable, Since 3.22.23
GDK_WINDOW_STATE_BOTTOM_TILED	whether the bottom edge is tiled, Since 3.22.23
GDK_WINDOW_STATE_BOTTOM_RESIZABLE	whether the bottom edge is resizable, Since 3.22.23
GDK_WINDOW_STATE_LEFT_TILED	whether the left edge is tiled, Since 3.22.23
GDK_WINDOW_STATE_LEFT_RESIZABLE	whether the left edge is resizable, Since 3.22.23

enum GdkSettingAction

Specifies the kind of modification applied to a setting in a GdkEventSetting.

Members

GDK_SETTING_ACTION_NEW	a setting was added.
GDK_SETTING_ACTION_CHANGED	a setting was changed.
GDK_SETTING_ACTION_DELETED	a setting was deleted.

enum GdkOwnerChange

Specifies why a selection ownership was changed.

Members

GDK_OWNER_CHANGE_NEW_OWNER	some other app claimed the ownership
GDK_OWNER_CHANGE_DESTROY	the window was destroyed
GDK_OWNER_CHANGE_CLOSE	the client was closed