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/*
Copyright 2014-2016 David Robillard <http://drobilla.net>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
@addtogroup pugl
@{
*/
#ifndef PUGL_EVENT_H_INCLUDED
#define PUGL_EVENT_H_INCLUDED
#ifdef __cplusplus
extern "C" {
#else
# include <stdbool.h>
#endif
#include "pugl/common.h"
/**
The type of a PuglEvent.
*/
typedef enum {
PUGL_NOTHING, /**< No event */
PUGL_BUTTON_PRESS, /**< Mouse button press */
PUGL_BUTTON_RELEASE, /**< Mouse button release */
PUGL_CONFIGURE, /**< View moved and/or resized */
PUGL_EXPOSE, /**< View exposed, redraw required */
PUGL_CLOSE, /**< Close view */
PUGL_KEY_PRESS, /**< Key press */
PUGL_KEY_RELEASE, /**< Key release */
PUGL_ENTER_NOTIFY, /**< Pointer entered view */
PUGL_LEAVE_NOTIFY, /**< Pointer left view */
PUGL_MOTION_NOTIFY, /**< Pointer motion */
PUGL_SCROLL, /**< Scroll */
PUGL_FOCUS_IN, /**< Keyboard focus entered view */
PUGL_FOCUS_OUT /**< Keyboard focus left view */
} PuglEventType;
typedef enum {
PUGL_IS_SEND_EVENT = 1
} PuglEventFlag;
/**
Reason for a PuglEventCrossing.
*/
typedef enum {
PUGL_CROSSING_NORMAL, /**< Crossing due to pointer motion. */
PUGL_CROSSING_GRAB, /**< Crossing due to a grab. */
PUGL_CROSSING_UNGRAB /**< Crossing due to a grab release. */
} PuglCrossingMode;
/**
Common header for all event structs.
*/
typedef struct {
PuglEventType type; /**< Event type. */
PuglView* view; /**< View that received this event. */
uint32_t flags; /**< Bitwise OR of PuglEventFlag values. */
} PuglEventAny;
/**
Button press or release event.
For event types PUGL_BUTTON_PRESS and PUGL_BUTTON_RELEASE.
*/
typedef struct {
PuglEventType type; /**< PUGL_BUTTON_PRESS or PUGL_BUTTON_RELEASE. */
PuglView* view; /**< View that received this event. */
uint32_t flags; /**< Bitwise OR of PuglEventFlag values. */
uint32_t time; /**< Time in milliseconds. */
double x; /**< View-relative X coordinate. */
double y; /**< View-relative Y coordinate. */
double x_root; /**< Root-relative X coordinate. */
double y_root; /**< Root-relative Y coordinate. */
unsigned state; /**< Bitwise OR of PuglMod flags. */
unsigned button; /**< 1-relative button number. */
} PuglEventButton;
/**
Configure event for when window size or position has changed.
*/
typedef struct {
PuglEventType type; /**< PUGL_CONFIGURE. */
PuglView* view; /**< View that received this event. */
uint32_t flags; /**< Bitwise OR of PuglEventFlag values. */
double x; /**< New parent-relative X coordinate. */
double y; /**< New parent-relative Y coordinate. */
double width; /**< New width. */
double height; /**< New height. */
} PuglEventConfigure;
/**
Expose event for when a region must be redrawn.
*/
typedef struct {
PuglEventType type; /**< PUGL_EXPOSE. */
PuglView* view; /**< View that received this event. */
uint32_t flags; /**< Bitwise OR of PuglEventFlag values. */
double x; /**< View-relative X coordinate. */
double y; /**< View-relative Y coordinate. */
double width; /**< Width of exposed region. */
double height; /**< Height of exposed region. */
int count; /**< Number of expose events to follow. */
} PuglEventExpose;
/**
Window close event.
*/
typedef struct {
PuglEventType type; /**< PUGL_CLOSE. */
PuglView* view; /**< View that received this event. */
uint32_t flags; /**< Bitwise OR of PuglEventFlag values. */
} PuglEventClose;
/**
Key press/release event.
Keys that correspond to a Unicode character have `character` and `utf8` set.
Other keys will have `character` 0, but `special` may be set if this is a
known special key.
A key press may be part of a multi-key sequence to generate a wide
character. If `filter` is set, this event is part of a multi-key sequence
and should be ignored if the application is reading textual input.
Following the series of filtered press events, a press event with
`character` and `utf8` (but `keycode` 0) will be sent. This event will have
no corresponding release event.
Generally, an application should either work with raw keyboard press/release
events based on `keycode` (ignoring events with `keycode` 0), or
read textual input based on `character` or `utf8` (ignoring releases and
events with `filter` 1). Note that blindly appending `utf8` will yield
incorrect text, since press events are sent for both individually composed
keys and the resulting synthetic multi-byte press.
*/
typedef struct {
PuglEventType type; /**< PUGL_KEY_PRESS or PUGL_KEY_RELEASE. */
PuglView* view; /**< View that received this event. */
uint32_t flags; /**< Bitwise OR of PuglEventFlag values. */
uint32_t time; /**< Time in milliseconds. */
double x; /**< View-relative X coordinate. */
double y; /**< View-relative Y coordinate. */
double x_root; /**< Root-relative X coordinate. */
double y_root; /**< Root-relative Y coordinate. */
unsigned state; /**< Bitwise OR of PuglMod flags. */
unsigned keycode; /**< Raw key code. */
uint32_t character; /**< Unicode character code, or 0. */
PuglKey special; /**< Special key, or 0. */
uint8_t utf8[8]; /**< UTF-8 string. */
bool filter; /**< True if part of a multi-key sequence. */
} PuglEventKey;
/**
Pointer crossing event (enter and leave).
*/
typedef struct {
PuglEventType type; /**< PUGL_ENTER_NOTIFY or PUGL_LEAVE_NOTIFY. */
PuglView* view; /**< View that received this event. */
uint32_t flags; /**< Bitwise OR of PuglEventFlag values. */
uint32_t time; /**< Time in milliseconds. */
double x; /**< View-relative X coordinate. */
double y; /**< View-relative Y coordinate. */
double x_root; /**< Root-relative X coordinate. */
double y_root; /**< Root-relative Y coordinate. */
unsigned state; /**< Bitwise OR of PuglMod flags. */
PuglCrossingMode mode; /**< Reason for crossing. */
} PuglEventCrossing;
/**
Pointer motion event.
*/
typedef struct {
PuglEventType type; /**< PUGL_MOTION_NOTIFY. */
PuglView* view; /**< View that received this event. */
uint32_t flags; /**< Bitwise OR of PuglEventFlag values. */
uint32_t time; /**< Time in milliseconds. */
double x; /**< View-relative X coordinate. */
double y; /**< View-relative Y coordinate. */
double x_root; /**< Root-relative X coordinate. */
double y_root; /**< Root-relative Y coordinate. */
unsigned state; /**< Bitwise OR of PuglMod flags. */
bool is_hint; /**< True iff this event is a motion hint. */
bool focus; /**< True iff this is the focused window. */
} PuglEventMotion;
/**
Scroll event.
The scroll distance is expressed in "lines", an arbitrary unit that
corresponds to a single tick of a detented mouse wheel. For example, `dy` =
1.0 scrolls 1 line up. Some systems and devices support finer resolution
and/or higher values for fast scrolls, so programs should handle any value
gracefully.
*/
typedef struct {
PuglEventType type; /**< PUGL_SCROLL. */
PuglView* view; /**< View that received this event. */
uint32_t flags; /**< Bitwise OR of PuglEventFlag values. */
uint32_t time; /**< Time in milliseconds. */
double x; /**< View-relative X coordinate. */
double y; /**< View-relative Y coordinate. */
double x_root; /**< Root-relative X coordinate. */
double y_root; /**< Root-relative Y coordinate. */
unsigned state; /**< Bitwise OR of PuglMod flags. */
double dx; /**< Scroll X distance in lines. */
double dy; /**< Scroll Y distance in lines. */
} PuglEventScroll;
/**
Keyboard focus event.
*/
typedef struct {
PuglEventType type; /**< PUGL_FOCUS_IN or PUGL_FOCUS_OUT. */
PuglView* view; /**< View that received this event. */
uint32_t flags; /**< Bitwise OR of PuglEventFlag values. */
bool grab; /**< True iff this is a grab/ungrab event. */
} PuglEventFocus;
/**
Interface event.
This is a union of all event structs. The `type` must be checked to
determine which fields are safe to access. A pointer to PuglEvent can
either be cast to the appropriate type, or the union members used.
*/
typedef union {
PuglEventType type; /**< Event type. */
PuglEventAny any; /**< Valid for all event types. */
PuglEventButton button; /**< PUGL_BUTTON_PRESS, PUGL_BUTTON_RELEASE. */
PuglEventConfigure configure; /**< PUGL_CONFIGURE. */
PuglEventCrossing crossing; /**< PUGL_ENTER_NOTIFY, PUGL_LEAVE_NOTIFY. */
PuglEventExpose expose; /**< PUGL_EXPOSE. */
PuglEventKey key; /**< PUGL_KEY_PRESS, PUGL_KEY_RELEASE. */
PuglEventMotion motion; /**< PUGL_MOTION_NOTIFY. */
PuglEventScroll scroll; /**< PUGL_SCROLL. */
PuglEventFocus focus; /**< PUGL_FOCUS_IN, PUGL_FOCUS_OUT. */
} PuglEvent;
/**
@}
*/
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* PUGL_EVENT_H_INCLUDED */
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