vertical_test.c

Screentest is a CRT/LCD screen testing utility.

/* $Id: vertical_test.c,v 1.1.1.1 2001/08/20 18:10:55 kas Exp $ */

/*
 *  Screentest - CRT monitor testing utility.
 *  http://www.fi.muni.cz/~kas/screentest/
 *  Copyright (C) 2001 Jan "Yenya" Kasprzak <[e-mail]>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <gtk/gtk.h>

#include "callbacks.h"
#include "interface.h"
#include "support.h"

#define GRID_STEP 64
#define GRID_STEP_MIN 2

static gint vertical_step;

static void vertical_init(GtkWidget * widget)
{
	vertical_step = GRID_STEP;
}

static void vertical_cycle(GtkWidget * widget)
{
	vertical_step /= 2;
	if (vertical_step < GRID_STEP_MIN)
		vertical_step = GRID_STEP;
}

static void vertical_draw(GtkWidget * widget, gboolean clear)
{
	GdkWindow *win = widget->window;
	gint w, h;
	gint i;
	gint d;

	if (clear)
		gdk_window_clear(win);

	gdk_window_get_size(win, &w, &h);

	d = w / 4;
	if (d > h / 4)
		d = h / 4;

	for (i = ((w - 1) % vertical_step) / 2; i < w; i += vertical_step)
		gdk_draw_line(win, gc, i, 0, i, h - 1);
}

struct test_ops vertical_ops = {
	init:vertical_init,
	draw:vertical_draw,
	cycle:vertical_cycle,
	close:NULL
};