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Learning_GTK4_tree/gdk/gdkeventsprivate.h

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2023-12-12 11:36:42 +01:00
/* 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, see <http://www.gnu.org/licenses/>.
*/
/*
* 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/.
*/
#pragma once
#include <gdk/gdktypes.h>
#include <gdk/gdkdrag.h>
#include <gdk/gdkdevice.h>
#include <gdk/gdkdevicetool.h>
G_BEGIN_DECLS
#define GDK_EVENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_EVENT, GdkEventClass))
typedef struct _GdkEventClass GdkEventClass;
/*< private >
* GdkEvent:
* @ref_count: the reference count of the event
* @event_type: the specialized event type
* @surface: the surface of the event
* @device: the device of the event
* @time: a serial identifier of the event that can be used to order
* two events
* @flags: event flags
*
* The abstract type for all windowing system events.
*/
struct _GdkEvent
{
GTypeInstance parent_instance;
grefcount ref_count;
/* Specialised event type */
GdkEventType event_type;
/* The surface of the event */
GdkSurface *surface;
/* The devices associated to the event */
GdkDevice *device;
guint32 time;
guint16 flags;
};
/*< private >
* GdkEventClass:
* @finalize: a function called when the last reference held on an event is
* released; implementations of GdkEvent must chain up to the parent class
*
* The base class for events.
*/
struct _GdkEventClass
{
GTypeClass parent_class;
void (* finalize) (GdkEvent *event);
GdkModifierType (* get_state) (GdkEvent *event);
gboolean (* get_position) (GdkEvent *event,
double *x,
double *y);
GdkEventSequence * (* get_sequence) (GdkEvent *event);
GdkDeviceTool * (* get_tool) (GdkEvent *event);
gboolean (* get_axes) (GdkEvent *event,
double **axes,
guint *n_axes);
};
/*
* GdkDeleteEvent:
*
* Generated when a surface is deleted.
*/
struct _GdkDeleteEvent
{
GdkEvent parent_instance;
};
/*
* GdkMotionEvent:
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) set during the motion
* event. See [flags@Gdk.ModifierType]
* @x: the x coordinate of the pointer relative to the surface.
* @y: the y coordinate of the pointer relative to the surface.
* @axes: @x, @y translated to the axes of @device, or %NULL if @device is
* the mouse.
* @history: (element-type GdkTimeCoord): a list of time and coordinates
* for other motion events that were compressed before delivering the
* current event
*
* Generated when the pointer moves.
*/
struct _GdkMotionEvent
{
GdkEvent parent_instance;
GdkModifierType state;
double x;
double y;
double *axes;
GdkDeviceTool *tool;
GArray *history; /* <GdkTimeCoord> */
};
/*
* GdkButtonEvent:
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See [flags@Gdk.ModifierType]
* @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.
* @x: the x coordinate of the pointer relative to the surface.
* @y: the y coordinate of the pointer relative to the surface.
* @axes: @x, @y translated to the axes of @device, or %NULL if @device is
* the mouse.
* @tool: a `GdkDeviceTool`
*
* Used for button press and button release events. The
* @type field will be one of %GDK_BUTTON_PRESS or %GDK_BUTTON_RELEASE,
*/
struct _GdkButtonEvent
{
GdkEvent parent_instance;
GdkModifierType state;
guint button;
double x;
double y;
double *axes;
GdkDeviceTool *tool;
};
/*
* GdkTouchEvent:
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See [flags@Gdk.ModifierType]
* @x: the x coordinate of the pointer relative to the surface
* @y: the y coordinate of the pointer relative to the surface
* @axes: @x, @y translated to the axes of the event's device, or %NULL
* if @device is the mouse
* @sequence: the event sequence that the event belongs to
* @emulated: whether the event is the result of a pointer emulation
*
* 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.
*/
struct _GdkTouchEvent
{
GdkEvent parent_instance;
GdkModifierType state;
double x;
double y;
double *axes;
GdkEventSequence *sequence;
gboolean touch_emulating;
gboolean pointer_emulated;
};
/*
* GdkScrollEvent:
* @x: the x coordinate of the pointer relative to the surface.
* @y: the y coordinate of the pointer relative to the surface.
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See [flags@Gdk.ModifierType]
* @direction: the direction to scroll to (one of %GDK_SCROLL_UP,
* %GDK_SCROLL_DOWN, %GDK_SCROLL_LEFT, %GDK_SCROLL_RIGHT or
* %GDK_SCROLL_SMOOTH).
* @delta_x: the x coordinate of the scroll delta
* @delta_y: the y coordinate of the scroll delta
* @tool: a `GdkDeviceTool`
* @history: (element-type GdkTimeCoord): array of times and deltas
* for other scroll events that were compressed before delivering the
* current event
* @unit: The scroll unit in which delta_x and delta_y are represented.
*
* 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().
*/
struct _GdkScrollEvent
{
GdkEvent parent_instance;
GdkModifierType state;
GdkScrollDirection direction;
double delta_x;
double delta_y;
gboolean is_stop;
GdkDeviceTool *tool;
GArray *history; /* <GdkTimeCoord> */
GdkScrollUnit unit;
};
/*
* GdkTranslatedKey:
* @keyval: the translated key symbol
* @consumed: the consumed modifiers
* @layout: the keyboard layout
* @level: the layout level
*
* Describes a translated key code.
*/
typedef struct {
guint keyval;
GdkModifierType consumed;
guint layout;
guint level;
} GdkTranslatedKey;
/*
* GdkKeyEvent:
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See [flags@Gdk.ModifierType]
* @keycode: the raw code of the key that was pressed or released.
* @translated: the result of translating @keycode. First with the full
* @state, then while ignoring Caps Lock.
* @compose_sequence: optional string for use by selected IM modules.
* Contains either partial compose sequences or the final composed
* string of the keystroke sequence.
*
* Describes a key press or key release event.
*/
struct _GdkKeyEvent
{
GdkEvent parent_instance;
GdkModifierType state;
guint32 keycode;
gboolean key_is_modifier;
GdkTranslatedKey translated[2];
char *compose_sequence;
};
/*
* GdkCrossingEvent:
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See [flags@Gdk.ModifierType]
* @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.
* @x: the x coordinate of the pointer relative to the surface.
* @y: the y coordinate of the pointer relative to the surface.
* @detail: the kind of crossing that happened (%GDK_NOTIFY_INFERIOR,
* %GDK_NOTIFY_ANCESTOR, %GDK_NOTIFY_VIRTUAL, %GDK_NOTIFY_NONLINEAR or
* %GDK_NOTIFY_NONLINEAR_VIRTUAL).
* @focus: %TRUE if @surface is the focus surface or an inferior.
* @child_surface: the surface that was entered or left.
*
* Generated when the pointer enters or leaves a surface.
*/
struct _GdkCrossingEvent
{
GdkEvent parent_instance;
GdkModifierType state;
GdkCrossingMode mode;
double x;
double y;
GdkNotifyType detail;
gboolean focus;
GdkSurface *child_surface;
};
/*
* GdkFocusEvent:
* @in: %TRUE if the surface has gained the keyboard focus, %FALSE if
* it has lost the focus.
* @mode: the crossing mode
* @detail: the kind of crossing that happened
*
* Describes a change of keyboard focus.
*/
struct _GdkFocusEvent
{
GdkEvent parent_instance;
gboolean focus_in;
};
/*
* GdkProximityEvent:
* @tool: the `GdkDeviceTool` associated to the event
*
* A proximity event indicates that a tool of a graphic tablet, or similar
* devices that report proximity, 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.
*/
struct _GdkProximityEvent
{
GdkEvent parent_instance;
GdkDeviceTool *tool;
};
/*
* GdkGrabBrokenEvent:
* @keyboard: %TRUE if a keyboard grab was broken, %FALSE if a pointer
* grab was broken
* @implicit: %TRUE if the broken grab was implicit
* @grab_surface: If this event is caused by another grab in the same
* application, @grab_surface contains the new grab surface. Otherwise
* @grab_surface is %NULL.
*
* Generated when a pointer or keyboard grab is broken. On X11, this happens
* when the grab surface 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 `GdkGrabBrokenEvent` events.
*/
struct _GdkGrabBrokenEvent
{
GdkEvent parent_instance;
gboolean keyboard;
gboolean implicit;
GdkSurface *grab_surface;
};
/*
* GdkDNDEvent:
* @drop: the `GdkDrop` for the current DND operation.
* @x: the X coordinate of the pointer
* @y: the Y coordinate of the pointer
*
* Generated during DND operations.
*/
struct _GdkDNDEvent
{
GdkEvent parent_instance;
GdkDrop *drop;
double x;
double y;
};
/*
* GdkTouchpadEvent:
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See [flags@Gdk.ModifierType]
* @phase: (type GdkTouchpadGesturePhase): the current phase of the gesture
* @n_fingers: The number of fingers triggering the pinch
* @time: the time of the event in milliseconds
* @x: The X coordinate of the pointer
* @y: The Y coordinate of the pointer
* @dx: Movement delta in the X axis of the swipe focal point
* @dy: Movement delta in the Y axis of the swipe focal point
* @angle_delta: For pinch events, the angle change in radians, negative angles
* denote counter-clockwise movements
* @scale: For pinch events, the current scale, relative to that at the time of
* the corresponding %GDK_TOUCHPAD_GESTURE_PHASE_BEGIN event
*
* Generated during touchpad gestures.
*/
struct _GdkTouchpadEvent
{
GdkEvent parent_instance;
GdkEventSequence *sequence;
GdkModifierType state;
gint8 phase;
gint8 n_fingers;
double x;
double y;
double dx;
double dy;
double angle_delta;
double scale;
};
struct _GdkPadEvent
{
GdkEvent parent_instance;
guint group;
guint mode;
guint button;
guint index;
double value;
};
void gdk_event_init_types (void);
GdkEvent * gdk_button_event_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
guint button,
double x,
double y,
double *axes);
GdkEvent * gdk_motion_event_new (GdkSurface *surface,
GdkDevice *device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
double x,
double y,
double *axes);
GdkEvent * gdk_crossing_event_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
guint32 time,
GdkModifierType state,
double x,
double y,
GdkCrossingMode mode,
GdkNotifyType notify);
GdkEvent * gdk_proximity_event_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDeviceTool *tool,
guint32 time);
GdkEvent * gdk_key_event_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
guint32 time,
guint keycode,
GdkModifierType modifiers,
gboolean is_modifier,
GdkTranslatedKey *translated,
GdkTranslatedKey *no_lock,
char *compose_sequence);
GdkEvent * gdk_focus_event_new (GdkSurface *surface,
GdkDevice *device,
gboolean focus_in);
GdkEvent * gdk_delete_event_new (GdkSurface *surface);
GdkEvent * gdk_scroll_event_new (GdkSurface *surface,
GdkDevice *device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
double delta_x,
double delta_y,
gboolean is_stop,
GdkScrollUnit unit);
GdkEvent * gdk_scroll_event_new_discrete (GdkSurface *surface,
GdkDevice *device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
GdkScrollDirection direction);
GdkEvent * gdk_scroll_event_new_value120 (GdkSurface *surface,
GdkDevice *device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
GdkScrollDirection direction,
double delta_x,
double delta_y);
GdkEvent * gdk_touch_event_new (GdkEventType type,
GdkEventSequence *sequence,
GdkSurface *surface,
GdkDevice *device,
guint32 time,
GdkModifierType state,
double x,
double y,
double *axes,
gboolean emulating);
GdkEvent * gdk_touchpad_event_new_swipe (GdkSurface *surface,
GdkEventSequence *sequence,
GdkDevice *device,
guint32 time,
GdkModifierType state,
GdkTouchpadGesturePhase phase,
double x,
double y,
int n_fingers,
double dx,
double dy);
GdkEvent * gdk_touchpad_event_new_pinch (GdkSurface *surface,
GdkEventSequence *sequence,
GdkDevice *device,
guint32 time,
GdkModifierType state,
GdkTouchpadGesturePhase phase,
double x,
double y,
int n_fingers,
double dx,
double dy,
double scale,
double angle_delta);
GdkEvent * gdk_touchpad_event_new_hold (GdkSurface *surface,
GdkEventSequence *sequence,
GdkDevice *device,
guint32 time,
GdkModifierType state,
GdkTouchpadGesturePhase phase,
double x,
double y,
int n_fingers);
GdkEvent * gdk_pad_event_new_ring (GdkSurface *surface,
GdkDevice *device,
guint32 time,
guint group,
guint index,
guint mode,
double value);
GdkEvent * gdk_pad_event_new_strip (GdkSurface *surface,
GdkDevice *device,
guint32 time,
guint group,
guint index,
guint mode,
double value);
GdkEvent * gdk_pad_event_new_button (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
guint32 time,
guint group,
guint button,
guint mode);
GdkEvent * gdk_pad_event_new_group_mode (GdkSurface *surface,
GdkDevice *device,
guint32 time,
guint group,
guint mode);
GdkEvent * gdk_dnd_event_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDrop *drop,
guint32 time,
double x,
double y);
GdkEvent * gdk_grab_broken_event_new (GdkSurface *surface,
GdkDevice *device,
GdkSurface *grab_surface,
gboolean implicit);
GdkTranslatedKey * gdk_key_event_get_translated_key (GdkEvent *event,
gboolean no_lock);
char * gdk_key_event_get_compose_sequence (GdkEvent *event);
typedef enum
{
/* Following flag is set for events on the event queue during
* translation and cleared afterwards.
*/
GDK_EVENT_PENDING = 1 << 0,
/* When we are ready to draw a frame, we pause event delivery,
* mark all events in the queue with this flag, and deliver
* only those events until we finish the frame.
*/
GDK_EVENT_FLUSHED = 1 << 2
} GdkEventFlags;
GdkEvent* _gdk_event_unqueue (GdkDisplay *display);
void _gdk_event_emit (GdkEvent *event);
GList* _gdk_event_queue_find_first (GdkDisplay *display);
void _gdk_event_queue_remove_link (GdkDisplay *display,
GList *node);
GList* _gdk_event_queue_append (GdkDisplay *display,
GdkEvent *event);
void _gdk_event_queue_handle_motion_compression (GdkDisplay *display);
void gdk_event_queue_handle_scroll_compression (GdkDisplay *display);
void _gdk_event_queue_flush (GdkDisplay *display);
double * gdk_event_dup_axes (GdkEvent *event);
G_END_DECLS