The program on xlib is not set by coordinates

Kamikadze · 05-13-2018, 07:17 PM

I'm using a graphical environment IceWM.
I wrote a gui program! Here's the code:

Code:

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

int main()
{
	Display *d;
	d = XOpenDisplay(NULL);
	if(d == NULL) {
		printf("Fail\n");
		return 1;
	}

	int dscr = DefaultScreen(d);
	XSetWindowAttributes attrs;
	attrs.background_pixel = WhitePixel(d, dscr);

	int root = RootWindow(d, dscr);
	Window w;
	w = XCreateWindow(d, root, 0, 0, 300, 100, 0,
		DefaultDepth(d, dscr), InputOutput, DefaultVisual(d, dscr), 
		CWBackPixel, &attrs);
	XStoreName(d, w, "Hello!");

	XMapWindow(d, w);
	XFlush(d);

	sleep(3);

	XDestroyWindow(d, w);

	XCloseDisplay(d);
	return 0;
}

Here is the screenshot of the result: imgur.com/a/8FbELpo

I replaced this line:

Code:

w = XCreateWindow(d, root, 0, 0, 300, 100, 0,
		DefaultDepth(d, dscr), InputOutput, DefaultVisual(d, dscr), 
		CWBackPixel, &attrs);

to this:

Code:

w = XCreateWindow(d, root, 400, 300, 300, 100, 0,
		DefaultDepth(d, dscr), InputOutput, DefaultVisual(d, dscr), 
		CWBackPixel, &attrs);

And here is the screenshot of the result: imgur.com/a/G6lqvIk

As you can see, the window did not change its coordinates, although everything was fine before. Before this recently, I updated the system. That's the problem and I do not know how to decide who will help me?

BW-userx · 05-13-2018, 08:35 PM

"A window manager may want to control the placement of subwindows"

from what I read and or remember from what I read the window Manager has the ultimate control over window placement.

X allows you (or, actually, the window manager) to control the placement and visibility of an entire client made up of a hierarchy of windows simply by manipulating the top-level window.

I'm still reading through this
http://menehune.opt.wfu.edu/Kokua/Ir...tml/index.html

here is another one
https://www.x.org/releases/X11R7.6/d...eating_Windows

another one
http://math.msu.su/~vvb/2course/Bori...ow/xintro.html

Kamikadze · 05-14-2018, 09:17 PM

Quote:

Originally Posted by BW-userx

"A window manager may want to control the placement of subwindows"

from what I read and or remember from what I read the window Manager has the ultimate control over window placement.

X allows you (or, actually, the window manager) to control the placement and visibility of an entire client made up of a hierarchy of windows simply by manipulating the top-level window.

I'm still reading through this
http://menehune.opt.wfu.edu/Kokua/Ir...tml/index.html

here is another one
https://www.x.org/releases/X11R7.6/d...eating_Windows

another one
http://math.msu.su/~vvb/2course/Bori...ow/xintro.html

Does this mean that the developer of my graphics environment is at fault? Right now, I'll write to him.

BW-userx · 05-15-2018, 03:39 PM

Quote:

Originally Posted by Kamikadze

Does this mean that the developer of my graphics environment is at fault? Right now, I'll write to him.

I do not know, what did he tell you?
I forget which chap I read this, don't quote me, that the window manager has control over the window placement, hence the term "window manager", But, I too remember it stating that their is a way to get around that too, But I never made it that far into the doc yet. but it is within the first 3 or 4 chaps.

here it is, chap 1

Code:

Another important concept in X programming is that applications do not actually control such things
as where a window appears or what size it is. Given multiprocessor, multiclient access to the same 
workstation display, clients must not be dependent on a particular window configuration. Instead, a 
client gives hints about how long and where it would like to be displayed.

The screen layout or appearance and the style of user interaction with the system are left up to a 
separate program, called the window manager.

source:
http://menehune.opt.wfu.edu/Kokua/Ir...html/ch01.html

you might want to read through that how to.

GazL · 05-15-2018, 04:42 PM

When a window manager is running you can't rely on getting the geometry you pass to XCreateSimpleWindow(). Go read up on how to use size_hints and XSetWMProperties().