playground/main.c

#include <stdio.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>

int main()
{
	Display *display = XOpenDisplay(NULL);
	Window main_window = XDefaultRootWindow(display);
	int screen = DefaultScreen(display);
	GC context = XDefaultGC(display, screen);

	XSetWindowAttributes attributes = {};
	attributes.background_pixel = 0xffffccaa;
	attributes.event_mask = ResizeRedirectMask | ExposureMask;
	Window window	= XCreateWindow(display, main_window,
			0, 0, 1920, 1080,
			1, CopyFromParent, CopyFromParent, CopyFromParent,
			CWBackPixel | CWEventMask, &attributes);

	XMapWindow(display, window);
	XFlush(display);

	Atom WM_DELETE_WINDOW = XInternAtom(display, "WM_DELETE_WINDOW", False);
	if(!XSetWMProtocols(display, window, &WM_DELETE_WINDOW, 1)) 
	{
		printf("Couldn't register WM_DELETE_WINDOW property \n");
	}

	int is_open = 1;
	while(is_open)
	{
		XEvent general_event = {};
		XNextEvent(display, &general_event);

		printf("Type: %d \n", general_event.type);
		switch(general_event.type)
		{
			case ClientMessage:
				{
					XClientMessageEvent *event = (XClientMessageEvent *) &general_event;
					if((Atom)event->data.l[0] == WM_DELETE_WINDOW) {
						XDestroyWindow(display, window);
						is_open = 0;
						printf("Window destroyed \n");
					}
				} break;
			case ResizeRequest:
				{
					static unsigned long color = 0x00aade87;
					if(color == 0x00aade87)
						color = 0xd000d087;
					else
						color = 0x00aade87;

					XSetWindowBackground(display, window, color);
				} break;
		}

		XClearWindow(display, window);
	}

	return 0;
}