xlib_playground

commit a98635208fb450c2469407449585ab92ce009ee3
parent ad350d81ba26c4f4b3fb65d9963314a5a92f13d0
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Thu, 22 Dec 2022 10:32:32 +0900

add new ex

Diffstat:
A
ex2/Makefile
 | 
14
++++++++++++++
A
ex2/ex2.c
 | 
111
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

2 files changed, 125 insertions(+), 0 deletions(-)
diff --git a/ex2/Makefile b/ex2/Makefile
@@ -0,0 +1,14 @@
+INCS=-I/usr/X11R6/include
+CFLAGS=-Wall -Wextra -std=c11
+LIBS=-L/usr/X11R6/lib -lX11 -lXext
+IN=*.c
+OUT=ex2
+
+all: main.c
+	$(CC) $(INCS) $(CFLAGS) -o $(OUT) $(IN) $(LIBS)
+
+run: all
+	./$(OUT)
+
+clean:
+	rm -f $(OUT)
diff --git a/ex2/ex2.c b/ex2/ex2.c
@@ -0,0 +1,111 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <math.h>
+
+#include <X11/Xlib.h>
+
+/* macros */
+#define INIT_WIDTH 800
+#define INIT_HEIGHT 600
+
+
+/* variables */
+Display     *display;
+Window       window;
+unsigned int win_width = INIT_WIDTH, win_height = INIT_HEIGHT;
+GC           gc;
+Atom         wm_delete_window;
+
+/* function prototypes */
+void setup(void);
+void cleanup(void);
+
+
+void
+setup(void)
+{
+	if ((display = XOpenDisplay(NULL)) == NULL){
+	    fprintf(stderr, "ERROR: could not open display\n");
+	    exit(1);
+	}
+	window = XCreateSimpleWindow(
+	                    display,
+	                    XDefaultRootWindow(display),
+	                    0, 0,
+	                    win_width, win_height,
+	                    0, 0,
+						0);
+	XStoreName(display, window, "UNKO");
+	gc = XCreateGC(display, window, 0, NULL);
+
+	wm_delete_window = XInternAtom(display, 
+	                               "WM_DELETE_WINDOW", False);
+	XSetWMProtocols(display, window, &wm_delete_window, 1);
+
+	XSelectInput(display, window,
+	             ExposureMask|KeyPressMask|KeyReleaseMask);
+	
+	XSetForeground(display, gc, 0x0000FF);
+	XMapWindow(display, window);
+}
+
+void
+cleanup(void)
+{
+	XCloseDisplay(display);
+}
+
+int
+main(void)
+{
+	int px, py;
+	int quit;
+	struct timespec ts;
+	XEvent event;
+
+	setup();
+	quit = 0;
+
+	while (!quit){
+		while(XPending(display) > 0){
+			XNextEvent(display, &event);
+			switch (event.type){
+			case KeyPress: {
+				switch (XLookupKeysym(&event.xkey, 0)){
+				case 'q':
+					quit = 1;
+					break;
+				default:
+					break;
+				}
+			} break;
+			case ClientMessage: {
+				if ((Atom) event.xclient.data.l[0] == wm_delete_window) {
+					quit = 1;
+				}
+			} break;
+			default:
+				break;
+			}
+		}
+		clock_gettime(CLOCK_MONOTONIC, &ts);
+		px = 200 + (int) (100 * sinf(ts.tv_sec + ts.tv_nsec / 1000.0 / 1000 / 1000));
+		py = 200 + (int) (100 * cosf(ts.tv_sec + ts.tv_nsec / 1000.0 / 1000 / 1000));
+		XClearArea(display, window,
+				   0, 0,                  // position
+				   win_width, win_height, // width and height
+				   False);
+		XFillRectangle(display, window, gc,
+					   px, py,    // position
+					   100, 100);   // width and height
+		
+		ts.tv_sec = 0;
+		ts.tv_nsec = 10 * 1000 * 1000;
+		nanosleep(&ts, NULL);
+	}
+
+	cleanup();
+	return 0;
+}