SDL_Event

SDL_Event

Name

SDL_Event -- General event structure

Structure Definition

typedef union{ Uint8 type; //类型 SDL_ActiveEvent active; //激活 SDL_KeyboardEvent key; SDL_MouseMotionEvent motion; SDL_MouseButtonEvent button; SDL_JoyAxisEvent jaxis; SDL_JoyBallEvent jball; SDL_JoyHatEvent jhat; SDL_JoyButtonEvent jbutton; SDL_ResizeEvent resize; SDL_ExposeEvent expose; SDL_QuitEvent quit; SDL_UserEvent user; //SDL_UserEvent 这个类型的。用户定义事件。 SDL_SysWMEvent syswm; } SDL_Event;

Structure Data

type	The type of event
active	Activation event (see )
key	Keyboard event (see )
motion	Mouse motion event (see )
button	Mouse button event (see )
jaxis	Joystick axis motion event (see )
jball	Joystick trackball motion event (see )
jhat	Joystick hat motion event (see )
jbutton	Joystick button event (see )
resize	Application window resize event (see )
expose	Application window expose event (see )
quit	Application quit request event (see )
user	User defined event (see )
syswm	Undefined window manager event (see )

Description

The  union is the core to all event handling in SDL; it's probably the most important structure after .  is a union of all event structures used in SDL, using it is a simple matter of knowing which union member relates to which event type.

Event type	Event Structure
SDL_ACTIVEEVENT
SDL_KEYDOWN/UP
SDL_MOUSEMOTION
SDL_MOUSEBUTTONDOWN/UP
SDL_JOYAXISMOTION
SDL_JOYBALLMOTION
SDL_JOYHATMOTION
SDL_JOYBUTTONDOWN/UP
SDL_VIDEORESIZE
SDL_VIDEOEXPOSE
SDL_QUIT
SDL_USEREVENT
SDL_SYSWMEVENT