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Diffstat (limited to 'pugl/event.h')
| -rw-r--r-- | pugl/event.h | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/pugl/event.h b/pugl/event.h new file mode 100644 index 0000000..211916d --- /dev/null +++ b/pugl/event.h @@ -0,0 +1,223 @@ +/* + Copyright 2014 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. +*/ + +/** + @file event.h PuglEvent struct definition. + + @ingroup pugl + @{ + + @name Event + @{ +*/ + +#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_BUTTON_PRESS, + PUGL_BUTTON_RELEASE, + PUGL_CONFIGURE, + PUGL_EXPOSE, + PUGL_KEY_PRESS, + PUGL_KEY_RELEASE, + PUGL_ENTER_NOTIFY, + PUGL_LEAVE_NOTIFY, + PUGL_MOTION_NOTIFY, + PUGL_NOTHING, + PUGL_SCROLL +} PuglEventType; + +/** + 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. */ + bool send_event; /**< True iff event was sent explicitly. */ +} 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. */ + bool send_event; /**< True iff event was sent explicitly. */ + 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. */ + bool send_event; /**< True iff event was sent explicitly. */ + 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. */ + bool send_event; /**< True iff event was sent explicitly. */ + 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; + +/** + Key press event. + + Keys that correspond to a Unicode character are expressed as a character + code. For other keys, `character` will be 0 and `special` indicates the key + pressed. +*/ +typedef struct { + PuglEventType type; /**< PUGL_KEY_PRESS or PUGL_KEY_RELEASE. */ + PuglView* view; /**< View that received this event. */ + bool send_event; /**< True iff event was sent explicitly. */ + 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. */ + uint32_t character; /**< Unicode character code, or 0. */ + PuglKey special; /**< Special key, if character is 0. */ +} 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. */ + bool send_event; /**< True iff event was sent explicitly. */ + 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. */ + bool send_event; /**< True iff event was sent explicitly. */ + 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. */ + bool send_event; /**< True iff event was sent explicitly. */ + 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; + +/** + 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. */ +} PuglEvent; + +/** + @} + @} +*/ + +#ifdef __cplusplus +} /* extern "C" */ +#endif + +#endif /* PUGL_EVENT_H_INCLUDED */ |