gtk/gdk/gdkevents.h

#ifndef __GDK_EVENTS_H__
#define __GDK_EVENTS_H__

#include <gdk/gdktypes.h>
#include <gdk/gdkdnd.h>
#include <gdk/gdkinput.h>

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#define	  GDK_PRIORITY_EVENTS		(G_PRIORITY_DEFAULT)

typedef struct _GdkEventAny	    GdkEventAny;
typedef struct _GdkEventExpose	    GdkEventExpose;
typedef struct _GdkEventNoExpose    GdkEventNoExpose;
typedef struct _GdkEventVisibility  GdkEventVisibility;
typedef struct _GdkEventMotion	    GdkEventMotion;
typedef struct _GdkEventButton	    GdkEventButton;
typedef struct _GdkEventScroll      GdkEventScroll;  
typedef struct _GdkEventKey	    GdkEventKey;
typedef struct _GdkEventFocus	    GdkEventFocus;
typedef struct _GdkEventCrossing    GdkEventCrossing;
typedef struct _GdkEventConfigure   GdkEventConfigure;
typedef struct _GdkEventProperty    GdkEventProperty;
typedef struct _GdkEventSelection   GdkEventSelection;
typedef struct _GdkEventProximity   GdkEventProximity;
typedef struct _GdkEventClient	    GdkEventClient;

typedef struct _GdkEventDND         GdkEventDND;

typedef union  _GdkEvent	    GdkEvent;

typedef void (*GdkEventFunc) (GdkEvent *event,
			      gpointer	data);

/* Event filtering */

typedef void GdkXEvent;	  /* Can be cast to XEvent */

typedef enum {
  GDK_FILTER_CONTINUE,	  /* Event not handled, continue processesing */
  GDK_FILTER_TRANSLATE,	  /* Translated event stored */
  GDK_FILTER_REMOVE	  /* Terminate processing, removing event */
} GdkFilterReturn;

typedef GdkFilterReturn (*GdkFilterFunc) (GdkXEvent *xevent,
					  GdkEvent *event,
					  gpointer  data);


/* Event types.
 *   Nothing: No event occurred.
 *   Delete: A window delete event was sent by the window manager.
 *	     The specified window should be deleted.
 *   Destroy: A window has been destroyed.
 *   Expose: Part of a window has been uncovered.
 *   NoExpose: Same as expose, but no expose event was generated.
 *   VisibilityNotify: A window has become fully/partially/not obscured.
 *   MotionNotify: The mouse has moved.
 *   ButtonPress: A mouse button was pressed.
 *   ButtonRelease: A mouse button was release.
 *   KeyPress: A key was pressed.
 *   KeyRelease: A key was released.
 *   EnterNotify: A window was entered.
 *   LeaveNotify: A window was exited.
 *   FocusChange: The focus window has changed. (The focus window gets
 *		  keyboard events).
 *   Resize: A window has been resized.
 *   Map: A window has been mapped. (It is now visible on the screen).
 *   Unmap: A window has been unmapped. (It is no longer visible on
 *	    the screen).
 *   Scroll: A mouse wheel was scrolled either up or down.
 */
typedef enum
{
  GDK_NOTHING		= -1,
  GDK_DELETE		= 0,
  GDK_DESTROY		= 1,
  GDK_EXPOSE		= 2,
  GDK_MOTION_NOTIFY	= 3,
  GDK_BUTTON_PRESS	= 4,
  GDK_2BUTTON_PRESS	= 5,
  GDK_3BUTTON_PRESS	= 6,
  GDK_BUTTON_RELEASE	= 7,
  GDK_KEY_PRESS		= 8,
  GDK_KEY_RELEASE	= 9,
  GDK_ENTER_NOTIFY	= 10,
  GDK_LEAVE_NOTIFY	= 11,
  GDK_FOCUS_CHANGE	= 12,
  GDK_CONFIGURE		= 13,
  GDK_MAP		= 14,
  GDK_UNMAP		= 15,
  GDK_PROPERTY_NOTIFY	= 16,
  GDK_SELECTION_CLEAR	= 17,
  GDK_SELECTION_REQUEST = 18,
  GDK_SELECTION_NOTIFY	= 19,
  GDK_PROXIMITY_IN	= 20,
  GDK_PROXIMITY_OUT	= 21,
  GDK_DRAG_ENTER        = 22,
  GDK_DRAG_LEAVE        = 23,
  GDK_DRAG_MOTION       = 24,
  GDK_DRAG_STATUS       = 25,
  GDK_DROP_START        = 26,
  GDK_DROP_FINISHED     = 27,
  GDK_CLIENT_EVENT	= 28,
  GDK_VISIBILITY_NOTIFY = 29,
  GDK_NO_EXPOSE		= 30,
  GDK_SCROLL            = 31
} GdkEventType;

/* Event masks. (Used to select what types of events a window
 *  will receive).
 */
typedef enum
{
  GDK_EXPOSURE_MASK		= 1 << 1,
  GDK_POINTER_MOTION_MASK	= 1 << 2,
  GDK_POINTER_MOTION_HINT_MASK	= 1 << 3,
  GDK_BUTTON_MOTION_MASK	= 1 << 4,
  GDK_BUTTON1_MOTION_MASK	= 1 << 5,
  GDK_BUTTON2_MOTION_MASK	= 1 << 6,
  GDK_BUTTON3_MOTION_MASK	= 1 << 7,
  GDK_BUTTON_PRESS_MASK		= 1 << 8,
  GDK_BUTTON_RELEASE_MASK	= 1 << 9,
  GDK_KEY_PRESS_MASK		= 1 << 10,
  GDK_KEY_RELEASE_MASK		= 1 << 11,
  GDK_ENTER_NOTIFY_MASK		= 1 << 12,
  GDK_LEAVE_NOTIFY_MASK		= 1 << 13,
  GDK_FOCUS_CHANGE_MASK		= 1 << 14,
  GDK_STRUCTURE_MASK		= 1 << 15,
  GDK_PROPERTY_CHANGE_MASK	= 1 << 16,
  GDK_VISIBILITY_NOTIFY_MASK	= 1 << 17,
  GDK_PROXIMITY_IN_MASK		= 1 << 18,
  GDK_PROXIMITY_OUT_MASK	= 1 << 19,
  GDK_SUBSTRUCTURE_MASK		= 1 << 20,
  GDK_SCROLL_MASK               = 1 << 21,
  GDK_ALL_EVENTS_MASK		= 0x3FFFFE
} GdkEventMask;

typedef enum
{
  GDK_VISIBILITY_UNOBSCURED,
  GDK_VISIBILITY_PARTIAL,
  GDK_VISIBILITY_FULLY_OBSCURED
} GdkVisibilityState;

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

/* Types of enter/leave notifications.
 *   Ancestor:
 *   Virtual:
 *   Inferior:
 *   Nonlinear:
 *   NonlinearVirtual:
 *   Unknown: An unknown type of enter/leave event occurred.
 */
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;

/* Enter/leave event modes.
 *   NotifyNormal
 *   NotifyGrab
 *   NotifyUngrab
 */
typedef enum
{
  GDK_CROSSING_NORMAL,
  GDK_CROSSING_GRAB,
  GDK_CROSSING_UNGRAB
} GdkCrossingMode;

typedef enum
{
  GDK_PROPERTY_NEW_VALUE,
  GDK_PROPERTY_DELETE
} GdkPropertyState;

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

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

struct _GdkEventNoExpose
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  /* XXX: does anyone need the X major_code or minor_code fields? */
};

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

struct _GdkEventMotion
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble pressure;
  gdouble xtilt;
  gdouble ytilt;
  guint state;
  gint16 is_hint;
  GdkInputSource source;
  guint32 deviceid;
  gdouble x_root, y_root;
};

struct _GdkEventButton
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble pressure;
  gdouble xtilt;
  gdouble ytilt;
  guint state;
  guint button;
  GdkInputSource source;
  guint32 deviceid;
  gdouble x_root, y_root;
};

struct _GdkEventScroll
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble pressure;
  gdouble xtilt;
  gdouble ytilt;
  guint state;
  GdkScrollDirection direction;
  GdkInputSource source;
  guint32 deviceid;
  gdouble x_root, y_root;
};

struct _GdkEventKey
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  guint state;
  guint keyval;
  gint length;
  gchar *string;
};

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;
};

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

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

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

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

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

struct _GdkEventProximity
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  GdkInputSource source;
  guint32 deviceid;
};

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

/* Event types for DND */

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

  guint32 time;
  gshort x_root, y_root;
};

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;
  GdkEventProximity	    proximity;
  GdkEventClient	    client;
  GdkEventDND               dnd;
};

gboolean  gdk_events_pending	 	(void);
GdkEvent* gdk_event_get			(void);

GdkEvent* gdk_event_peek                (void);
GdkEvent* gdk_event_get_graphics_expose (GdkWindow 	*window);
void      gdk_event_put	 		(GdkEvent  	*event);

GdkEvent* gdk_event_copy     		(GdkEvent 	*event);
void	  gdk_event_free     		(GdkEvent 	*event);
guint32   gdk_event_get_time 		(GdkEvent 	*event);

void	  gdk_event_handler_set 	(GdkEventFunc    func,
					 gpointer        data,
					 GDestroyNotify  notify);

void	  gdk_set_show_events		(gboolean	 show_events);
gboolean  gdk_get_show_events		(void);

/*
 * The following function adds a global filter for all client
 * messages of type message_type
 */
void gdk_add_client_message_filter (GdkAtom       message_type,
				    GdkFilterFunc func,
				    gpointer      data);


#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __GDK_EVENTS_H__ */