Event Structures
3
GDK Library

# Event Structures

Data structures specific to each type of event

## Synopsis

    #include <gdk/gdk.h>

    union               GdkEvent;

                        GdkEventAny;
                        GdkEventKey;
                        GdkEventButton;
                        GdkEventScroll;
                        GdkEventMotion;
                        GdkEventExpose;
                        GdkEventVisibility;
                        GdkEventCrossing;
                        GdkEventFocus;
                        GdkEventConfigure;
                        GdkEventProperty;
                        GdkEventSelection;
    typedef             GdkNativeWindow;
                        GdkEventDND;
                        GdkEventProximity;
                        GdkEventClient;
                        GdkEventNoExpose;
                        GdkEventWindowState;
                        GdkEventSetting;
                        GdkEventOwnerChange;
                        GdkEventGrabBroken;

    enum                GdkScrollDirection;
    enum                GdkVisibilityState;
    enum                GdkCrossingMode;
    enum                GdkNotifyType;
    enum                GdkPropertyState;
    enum                GdkWindowState;
    enum                GdkSettingAction;
    enum                GdkOwnerChange;

## Description

The event structs 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()`.

## Details

### union GdkEvent

    union GdkEvent
    {
      GdkEventType		    type;
      GdkEventAny		    any;
      GdkEventExpose	    expose;
      GdkEventNoExpose	    no_expose;
      GdkEventVisibility	    visibility;
      GdkEventMotion	    motion;
      GdkEventButton	    button;
      GdkEventScroll            scroll;
      GdkEventKey		    key;
      GdkEventCrossing	    crossing;
      GdkEventFocus		    focus_change;
      GdkEventConfigure	    configure;
      GdkEventProperty	    property;
      GdkEventSelection	    selection;
      GdkEventOwnerChange  	    owner_change;
      GdkEventProximity	    proximity;
      GdkEventClient	    client;
      GdkEventDND               dnd;
      GdkEventWindowState       window_state;
      GdkEventSetting           setting;
      GdkEventGrabBroken        grab_broken;
    };

The GdkEvent struct contains a union of all of the event structs, 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 structs, 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 structs, the pointer to the event can be cast to the appropriate event struct pointer, 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;

### GdkEventAny

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

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.

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 (e.g. using `XSendEvent`).

### GdkEventKey

    typedef struct {
      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;
    } GdkEventKey;

Describes a key press or key release event.

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 (e.g. using `XSendEvent`).

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.

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 the 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

### GdkEventButton

    typedef struct {
      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;
    } GdkEventButton;

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

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

1. `GDK_BUTTON_PRESS`

2. `GDK_BUTTON_RELEASE`

3. `GDK_BUTTON_PRESS`

4. `GDK_2BUTTON_PRESS`

5. `GDK_BUTTON_RELEASE`

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:

1. `GDK_BUTTON_PRESS`

2. `GDK_BUTTON_RELEASE`

3. `GDK_BUTTON_PRESS`

4. `GDK_2BUTTON_PRESS`

5. `GDK_BUTTON_RELEASE`

6. `GDK_BUTTON_PRESS`

7. `GDK_3BUTTON_PRESS`

8. `GDK_BUTTON_RELEASE`

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.

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 (e.g. using `XSendEvent`).

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.

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 device where the event originated.

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.

### GdkEventScroll

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

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.

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 (e.g. using `XSendEvent`).

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.

GdkScrollDirection direction;

  the direction to scroll to (one of `GDK_SCROLL_UP`, `GDK_SCROLL_DOWN`, `GDK_SCROLL_LEFT` and `GDK_SCROLL_RIGHT`).

GdkDevice *device;

  the device where the event originated.

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.

### GdkEventMotion

    typedef struct {
      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;
    } GdkEventMotion;

Generated when the pointer moves.

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 (e.g. using `XSendEvent`).

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.

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 device where the event originated.

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.

### GdkEventExpose

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

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

GdkEventType type;

  the type of the event (`GDK_EXPOSE`).

GdkWindow *window;

  the window which received the event.

gint8 send_event;

  %TRUE if the event was sent explicitly (e.g. using `XSendEvent`).

GdkRectangle area;

  bounding box of `region`.

GdkRegion *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.

### GdkEventVisibility

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

Generated when the window visibility status has changed.

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 (e.g. using `XSendEvent`).

GdkVisibilityState state;

  the new visibility state (`GDK_VISIBILITY_FULLY_OBSCURED`, `GDK_VISIBILITY_PARTIAL` or `GDK_VISIBILITY_UNOBSCURED`).

### GdkEventCrossing

    typedef struct {
      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;
    } GdkEventCrossing;

Generated when the pointer enters or leaves a window.

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 (e.g. using `XSendEvent`).

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.

### GdkEventFocus

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

Describes a change of keyboard focus.

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 (e.g. using `XSendEvent`).

gint16 in;

  %TRUE if the window has gained the keyboard focus, `FALSE` if it has lost the focus.

### GdkEventConfigure

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

Generated when a window size or position has changed.

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 (e.g. using `XSendEvent`).

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.

### GdkEventProperty

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

Describes a property change on a window.

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 (e.g. using `XSendEvent`).

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`).

### GdkEventSelection

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

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

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 (e.g. using `XSendEvent`).

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.

GdkNativeWindow requestor;

  the native window on which to place `property`.

### GdkNativeWindow

Used to represent native windows (Windows for the X11 backend, HWNDs for Win32).

### GdkEventDND

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

      guint32 time;
      gshort x_root, y_root;
    } GdkEventDND;

Generated during DND operations.

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 (e.g. using `XSendEvent`).

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`.

### GdkEventProximity

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

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.

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 (e.g. using `XSendEvent`).

guint32 time;

  the time of the event in milliseconds.

GdkDevice *device;

  the device where the event originated.

### GdkEventClient

    typedef struct {
      GdkEventType type;
      GdkWindow *window;
      gint8 send_event;
      GdkAtom message_type;
      gushort data_format;
      union {
        char b[20];
        short s[10];
        long l[5];
      } data;
    } GdkEventClient;

An event sent by another client application.

GdkEventType type;

  the type of the event (`GDK_CLIENT_EVENT`).

GdkWindow *window;

  the window which received the event.

gint8 send_event;

  %TRUE if the event was sent explicitly (e.g. using `XSendEvent`).

GdkAtom message_type;

  the type of the message, which can be defined by the application.

gushort data_format;

  the format of the data, given as the number of bits in each data element, i.e. 8, 16, or 32. 8-bit data uses the b array of the data union, 16-bit data uses the s array, and 32-bit data uses the l array.

### GdkEventNoExpose

    typedef struct {
      GdkEventType type;
      GdkWindow *window;
      gint8 send_event;
    } GdkEventNoExpose;

Generated when the area of a GdkDrawable being copied, with `gdk_draw_drawable()` or `gdk_window_copy_area()`, was completely available.

FIXME: add more here.

GdkEventType type;

  the type of the event (`GDK_NO_EXPOSE`).

GdkWindow *window;

  the window which received the event.

gint8 send_event;

  %TRUE if the event was sent explicitly (e.g. using `XSendEvent`).

### GdkEventWindowState

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

Generated when the state of a toplevel window changes.

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 (e.g. using `XSendEvent`).

GdkWindowState changed_mask;

  mask specifying what flags have changed.

GdkWindowState new_window_state;

  the new window state, a combination of GdkWindowState bits.

### GdkEventSetting

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

Generated when a setting is modified.

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 (e.g. using `XSendEvent`).

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.

### GdkEventOwnerChange

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

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

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 (e.g. using `XSendEvent`).

GdkNativeWindow owner;

  the new owner of the selection

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

### GdkEventGrabBroken

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

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.

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 (e.g. using `XSendEvent`).

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

### enum GdkScrollDirection

    typedef enum
    {
      GDK_SCROLL_UP,
      GDK_SCROLL_DOWN,
      GDK_SCROLL_LEFT,
      GDK_SCROLL_RIGHT
    } GdkScrollDirection;

Specifies the direction for GdkEventScroll.

`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.

### enum GdkVisibilityState

    typedef enum
    {
      GDK_VISIBILITY_UNOBSCURED,
      GDK_VISIBILITY_PARTIAL,
      GDK_VISIBILITY_FULLY_OBSCURED
    } GdkVisibilityState;

Specifies the visiblity status of a window for a GdkEventVisibility.

`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

    typedef enum
    {
      GDK_CROSSING_NORMAL,
      GDK_CROSSING_GRAB,
      GDK_CROSSING_UNGRAB,
      GDK_CROSSING_GTK_GRAB,
      GDK_CROSSING_GTK_UNGRAB,
      GDK_CROSSING_STATE_CHANGED
    } GdkCrossingMode;

Specifies the crossing mode for GdkEventCrossing.

`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).

### enum GdkNotifyType

    typedef enum
    {
      GDK_NOTIFY_ANCESTOR		= 0,
      GDK_NOTIFY_VIRTUAL		= 1,
      GDK_NOTIFY_INFERIOR		= 2,
      GDK_NOTIFY_NONLINEAR		= 3,
      GDK_NOTIFY_NONLINEAR_VIRTUAL	= 4,
      GDK_NOTIFY_UNKNOWN		= 5
    } GdkNotifyType;

Specifies the kind of crossing for GdkEventCrossing.

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

`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

    typedef enum
    {
      GDK_PROPERTY_NEW_VALUE,
      GDK_PROPERTY_DELETE
    } GdkPropertyState;

Specifies the type of a property change for a GdkEventProperty.

`GDK_PROPERTY_NEW_VALUE`

  the property value was changed.

`GDK_PROPERTY_DELETE`

  the property was deleted.

### enum GdkWindowState

    typedef enum
    {
      GDK_WINDOW_STATE_WITHDRAWN  = 1 << 0,
      GDK_WINDOW_STATE_ICONIFIED  = 1 << 1,
      GDK_WINDOW_STATE_MAXIMIZED  = 1 << 2,
      GDK_WINDOW_STATE_STICKY     = 1 << 3,
      GDK_WINDOW_STATE_FULLSCREEN = 1 << 4,
      GDK_WINDOW_STATE_ABOVE      = 1 << 5,
      GDK_WINDOW_STATE_BELOW      = 1 << 6
    } GdkWindowState;

Specifies the state of a toplevel window.

`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.

### enum GdkSettingAction

    typedef enum
    {
      GDK_SETTING_ACTION_NEW,
      GDK_SETTING_ACTION_CHANGED,
      GDK_SETTING_ACTION_DELETED
    } GdkSettingAction;

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

`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

    typedef enum
    {
      GDK_OWNER_CHANGE_NEW_OWNER,
      GDK_OWNER_CHANGE_DESTROY,
      GDK_OWNER_CHANGE_CLOSE
    } GdkOwnerChange;

Specifies why a selection ownership was changed.

`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