Sdl2 操纵杆不捕获“按下事件"； [英] Sdl2 joystick don't capture "Pressed event"

问题描述

我有一个在 SDL(简单的直接媒体层)上运行的应用程序.我已将其移植到 SDL2.但是移植后，joystick(SDL_PollEvent) 只捕获了摇杆按钮的释放事件.有什么问题吗或者有什么设置可以在 SDL2 中捕获新闻事件?

I have an application which runs on SDL(simple directmedia layer). I've ported it to SDL2. But after porting, joystick(SDL_PollEvent) is only captures the release event of joysticks button. Is there anything wrong or is there any setting for capturing press events in SDL2?

推荐答案

我也有一个 loop 和 swich 语句.我只能通过这个循环获得操纵杆按钮的释放事件.

I have a loop and swich statement too.I could get only release events of joystick button by this loop.

我在几秒钟前找到了答案.如果我在 SDL_Init 语句之前调用 SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,"1") ，操纵杆按钮获取按下和释放事件，否则轮询无法捕获按下事件.

I found the answer a few seconds ago. If I call SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,"1") before SDL_Init statement, joystick button gets press and release events, otherwise polling can not capture press event.

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