gdkevents.h

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/* GDK - The GIMP Drawing Kit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
 
/*
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
 */
 
#ifndef __GDK_EVENTS_H__
#define __GDK_EVENTS_H__
 
#if defined(GTK_DISABLE_SINGLE_INCLUDES) && !defined (__GDK_H_INSIDE__) && !defined (GDK_COMPILATION)
#error "Only <gdk/gdk.h> can be included directly."
#endif
 
#include <gdk/gdkcolor.h>
#include <gdk/gdktypes.h>
#include <gdk/gdkdnd.h>
#include <gdk/gdkinput.h>
 
G_BEGIN_DECLS
 
#define GDK_TYPE_EVENT          (gdk_event_get_type ())
 
#define GDK_PRIORITY_EVENTS     (G_PRIORITY_DEFAULT)
#define GDK_PRIORITY_REDRAW     (G_PRIORITY_HIGH_IDLE + 20)
 
 
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 _GdkEventOwnerChange GdkEventOwnerChange;
typedef struct _GdkEventProximity   GdkEventProximity;
typedef struct _GdkEventClient      GdkEventClient;
typedef struct _GdkEventDND         GdkEventDND;
typedef struct _GdkEventWindowState GdkEventWindowState;
typedef struct _GdkEventSetting     GdkEventSetting;
typedef struct _GdkEventGrabBroken  GdkEventGrabBroken;
 
typedef union  _GdkEvent            GdkEvent;
 
typedef void (*GdkEventFunc) (GdkEvent *event,
                              gpointer  data);
 
/* Event filtering */
 
typedef void GdkXEvent;   /* Can be cast to window system specific
                           * even type, XEvent on X11, MSG on Win32.
                           */
 
typedef enum {
  GDK_FILTER_CONTINUE,    /* Event not handled, continue processesing */
  GDK_FILTER_TRANSLATE,   /* Native event translated into a GDK event and
                             stored in the "event" structure that was
                             passed in */
  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,
  GDK_WINDOW_STATE      = 32,
  GDK_SETTING           = 33,
  GDK_OWNER_CHANGE      = 34,
  GDK_GRAB_BROKEN       = 35,
  GDK_DAMAGE            = 36,
  GDK_EVENT_LAST        /* helper variable for decls */
} 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,
  GDK_CROSSING_GTK_GRAB,
  GDK_CROSSING_GTK_UNGRAB,
  GDK_CROSSING_STATE_CHANGED
} GdkCrossingMode;
 
typedef enum
{
  GDK_PROPERTY_NEW_VALUE,
  GDK_PROPERTY_DELETE
} GdkPropertyState;
 
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;
 
typedef enum
{
  GDK_SETTING_ACTION_NEW,
  GDK_SETTING_ACTION_CHANGED,
  GDK_SETTING_ACTION_DELETED
} GdkSettingAction;
 
typedef enum
{
  GDK_OWNER_CHANGE_NEW_OWNER,
  GDK_OWNER_CHANGE_DESTROY,
  GDK_OWNER_CHANGE_CLOSE
} GdkOwnerChange;
 
struct _GdkEventAny
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
};
 
struct _GdkEventExpose
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkRectangle area;
  GdkRegion *region;
  gint count; /* If non-zero, how many more events follow. */
};
 
struct _GdkEventNoExpose
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
};
 
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 *axes;
  guint state;
  gint16 is_hint;
  GdkDevice *device;
  gdouble x_root, y_root;
};
 
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;
};
 
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;
  gboolean has_deltas;
  gdouble delta_x;
  gdouble delta_y;
};
 
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;
};
 
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 time;
  GdkNativeWindow requestor;
};
 
struct _GdkEventOwnerChange
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkNativeWindow owner;
  GdkOwnerChange reason;
  GdkAtom selection;
  guint32 time;
  guint32 selection_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;
  GdkDevice *device;
};
 
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;
};
 
struct _GdkEventSetting
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkSettingAction action;
  char *name;
};
 
struct _GdkEventWindowState
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkWindowState changed_mask;
  GdkWindowState new_window_state;
};
 
struct _GdkEventGrabBroken {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  gboolean keyboard;
  gboolean implicit;
  GdkWindow *grab_window;
};
 
/* 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;
  GdkEventOwnerChange       owner_change;
  GdkEventProximity         proximity;
  GdkEventClient            client;
  GdkEventDND               dnd;
  GdkEventWindowState       window_state;
  GdkEventSetting           setting;
  GdkEventGrabBroken        grab_broken;
};
 
GType     gdk_event_get_type            (void) G_GNUC_CONST;
 
gboolean  gdk_events_pending            (void);
GdkEvent* gdk_event_get                 (void);
 
GdkEvent* gdk_event_peek                (void);
#ifndef GDK_DISABLE_DEPRECATED
GdkEvent* gdk_event_get_graphics_expose (GdkWindow      *window);
#endif
void      gdk_event_put                 (const GdkEvent *event);
 
GdkEvent* gdk_event_new                 (GdkEventType    type);
GdkEvent* gdk_event_copy                (const GdkEvent *event);
void      gdk_event_free                (GdkEvent       *event);
 
guint32   gdk_event_get_time            (const GdkEvent  *event);
gboolean  gdk_event_get_state           (const GdkEvent  *event,
                                         GdkModifierType *state);
gboolean  gdk_event_get_coords          (const GdkEvent  *event,
                                         gdouble         *x_win,
                                         gdouble         *y_win);
gboolean  gdk_event_get_root_coords     (const GdkEvent  *event,
                                         gdouble         *x_root,
                                         gdouble         *y_root);
gboolean  gdk_event_get_scroll_deltas   (const GdkEvent *event,
                                         gdouble         *delta_x,
                                         gdouble         *delta_y);
gboolean  gdk_event_get_axis            (const GdkEvent  *event,
                                         GdkAxisUse       axis_use,
                                         gdouble         *value);
void      gdk_event_request_motions     (const GdkEventMotion *event);
void      gdk_event_handler_set         (GdkEventFunc    func,
                                         gpointer        data,
                                         GDestroyNotify  notify);
 
void       gdk_event_set_screen         (GdkEvent        *event,
                                         GdkScreen       *screen);
GdkScreen *gdk_event_get_screen         (const GdkEvent  *event);
 
void      gdk_set_show_events           (gboolean        show_events);
gboolean  gdk_get_show_events           (void);
 
#ifndef GDK_MULTIHEAD_SAFE
void gdk_add_client_message_filter (GdkAtom       message_type,
                                    GdkFilterFunc func,
                                    gpointer      data);
 
gboolean gdk_setting_get (const gchar *name,
                          GValue      *value); 
#endif /* GDK_MULTIHEAD_SAFE */
 
G_END_DECLS
 
#endif /* __GDK_EVENTS_H__ */