下列的資料型態被 GTK+ 傳遞給事件處理函式。列出每種資料型態同時也列出了使用該類型的信號。
- GdkEvent
- drag_end_event
- GdkEventType<
- GdkEventAny
- delete_event
- destroy_event
- map_event
- unmap_event
- no_expose_event
- GdkEventExpose
- expose_event
- GdkEventNoExpose
- GdkEventVisibility
- GdkEventMotion
- motion_notify_event
- GdkEventButton
- button_press_event
- button_release_event
- GdkEventKey
- key_press_event
- key_release_event
- GdkEventCrossing
- enter_notify_event
- leave_notify_event
- GdkEventFocus
- focus_in_event
- focus_out_event
- GdkEventConfigure
- configure_event
- GdkEventProperty
- property_notify_event
- GdkEventSelection
- selection_clear_event
- selection_request_event
- selection_notify_event
- GdkEventProximity
- proximity_in_event
- proximity_out_event
- GdkEventDragBegin
- drag_begin_event
- GdkEventDragRequest
- drag_request_event
- GdkEventDropEnter
- drop_enter_event
- GdkEventDropLeave
- drop_leave_event
- GdkEventDropDataAvailable
- drop_data_available_event
- GdkEventClient
- client_event
- GdkEventOther
- other_event
資料型態GdkEventType是一個特殊的資料型態，它被其餘的資料型態使用，作為一個傳遞給信號處理函式的資料型別指示器。在下面你會看到，每個事件資料結構有一個該型別的成員。它是如下的列舉值：
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_BEGIN = 22,
GDK_DRAG_REQUEST = 23,
GDK_DROP_ENTER = 24,
GDK_DROP_LEAVE = 25,
GDK_DROP_DATA_AVAIL = 26,
GDK_CLIENT_EVENT = 27,
GDK_VISIBILITY_NOTIFY = 28,
GDK_NO_EXPOSE = 29,
GDK_OTHER_EVENT = 9999 /* 不贊成使用，用過濾器代替 */
} GdkEventType;
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剩下的，與其餘事件型別不同的是GdkEvent。它是所有其餘資料型態的統一，允許在一個信號處理函式中轉換為指定的事件資料型別。
因此，事件型別有如下定義：
struct _GdkEventAny{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
};struct _GdkEventExpose
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkRectangle area;
gint count; /* 如果非零，它是跟隨事件的數目。*/
};
struct _GdkEventNoExpose
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
/* XXX: 有人需要X major_code或minor_code欄位嗎？*/
};
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 _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;
GdkNotifyType detail;
};
struct _GdkEventFocus
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
gint16 in;
};
struct _GdkEventConfigure
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
gint16 x, y;
gint16 width;
gint16 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;
};
/* 這個事件資料型別很少用。它在支持XInput的程式中，用於繪製自己的游標 */
struct _GdkEventProximity
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 time;
GdkInputSource source;
guint32 deviceid;
};
struct _GdkEventDragRequest
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 requestor;
union {
struct {
guint protocol_version:4;
guint sendreply:1;
guint willaccept:1;
guint delete_data:1; /* Do *not* delete if link is sent, only
if data is sent */
guint senddata:1;
guint reserved:22;
} flags;
glong allflags;
} u;
guint8 isdrop;/* 幾個 X 事件能產生這個gdk事件---這讓應用程式知道拖放是否真的發生
或我們僅僅設置資料 */
GdkPoint drop_coords;
gchar *data_type;
guint32 timestamp;
};
struct _GdkEventDragBegin
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
union {
struct {
guint protocol_version:4;
guint reserved:28;
} flags;
glong allflags;
} u;
};
struct _GdkEventDropEnter
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 requestor;
union {
struct {
guint protocol_version:4;
guint sendreply:1;
guint extended_typelist:1;
guint reserved:26;
} flags;
glong allflags;
} u;
};
struct _GdkEventDropLeave
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 requestor;
union {
struct {
guint protocol_version:4;
guint reserved:28;
} flags;
glong allflags;
} u;
};
struct _GdkEventDropDataAvailable
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 requestor;
union {
struct {
guint protocol_version:4;
guint isdrop:1;
guint reserved:25;
} flags;
glong allflags;
} u;
gchar *data_type; /* MIME type */
gulong data_numbytes;
gpointer data;
guint32 timestamp;
GdkPoint coords;
};
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 _GdkEventOther
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkXEvent *xevent;
};
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