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Draw a pixel: Difference between revisions
→{{header|C}}
imported>Tybalt89 |
imported>Tybalt89 |
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Line 741:
}
</syntaxhighlight>
===Plain Xlib version===
Which is why most people use a framework :)
<syntaxhighlight lang="c">// dotrosetta.c - https://rosettacode.org/wiki/Draw_a_pixel
#include <X11/Xutil.h>
#include <stdio.h>
#include <stdlib.h>
int
main(void)
{
Atom wm_both_protocols[1];
Atom wm_delete;
Atom wm_protocols;
Display *display;
GC gc;
Window root;
Window window;
XEvent event;
XSetWindowAttributes attr;
int more = 1;
display = XOpenDisplay(NULL);
if(display == NULL)
{
fprintf(stderr,"Error: The display cannot be opened\n");
exit(1);
}
root = DefaultRootWindow(display);
wm_delete = XInternAtom(display, "WM_DELETE_WINDOW", False);
wm_protocols = XInternAtom(display, "WM_PROTOCOLS", False);
attr.background_pixel = 0x000000;
attr.event_mask = ExposureMask;
window = XCreateWindow(display, root,
0, 0, 320, 240, 0,
CopyFromParent, InputOutput, CopyFromParent,
CWBackPixel | CWEventMask,
&attr
);
XStoreName(display, window, "Draw a Pixel");
wm_both_protocols[0] = wm_delete;
XSetWMProtocols(display, window, wm_both_protocols, 1);
gc = XCreateGC(display, window, 0, NULL);
XSetForeground(display, gc, 0xFF0000);
XMapWindow(display, window);
while(more)
{
XNextEvent(display, &event);
switch(event.type)
{
case Expose:
XDrawPoint(display, window, gc, 100, 100);
break;
case ClientMessage: // for close request from WM
if(event.xclient.window == window &&
event.xclient.message_type == wm_protocols &&
event.xclient.format == 32 &&
event.xclient.data.l[0] == wm_delete)
{
more = 0;
}
break;
default:
printf("unexpected event.type %d\n", event.type);;
}
}
XCloseDisplay(display);
exit(0);
}</syntaxhighlight>
=={{header|Delphi}}==
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