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Watch window resize events

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Patryk Obara 2020-04-11 00:11:30 +02:00 • committed by Patryk Obara
parent fff4dcf8b3
commit 5b5cbd7f4b
1 changed files with 34 additions and 0 deletions
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34
src/gui/sdlmain.cpp
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@ -422,6 +422,37 @@ void GFX_SetTitle(Bit32s cycles, int /*frameskip*/, bool paused)
SDL_SetWindowTitle(sdl.window, title);
}
/* This function is SDL_EventFilter which is being called when event is
* pushed into the SDL event queue.
*
* WARNING: Be very careful of what you do in this function, as it may run in
* a different thread!
*
* Read documentation for SDL_AddEventWatch for more details.
*/
static int watch_sdl_events(void *userdata, SDL_Event *e)
{
/* There's a significant difference in handling of window resize
* events in different OSes. When handling resize in main event loop
* we receive continuous stream of events (as expected) on Linux,
* but only single event after user stopped dragging cursor on Windows
* and macOS.
*
* Watching resize events here gives us continuous stream on
* every OS.
*/
if (e->type == SDL_WINDOWEVENT && e->window.event == SDL_WINDOWEVENT_RESIZED) {
SDL_Window *win = SDL_GetWindowFromID(e->window.windowID);
if (win == (SDL_Window *)userdata) {
const int w = e->window.data1;
const int h = e->window.data2;
DEBUG_LOG_MSG("SDL: Resizing window %d to %dx%d",
e->window.windowID, w, h);
}
}
return 0;
}
static unsigned char logo[32*32*4]= {
#include "dosbox_logo.h"
};
@ -591,6 +622,9 @@ static SDL_Window *SetWindowMode(SCREEN_TYPES screen_type,
const int sdl_pos = SDL_WINDOWPOS_UNDEFINED_DISPLAY(sdl.display_number);
sdl.window = SDL_CreateWindow("", sdl_pos, sdl_pos, width, height, flags);
if (resizable)
SDL_AddEventWatch(watch_sdl_events, sdl.window);
if (!sdl.window) {
return sdl.window;
}