/*
Correctrix removes barrel and perspective distortion from photographs with PHP's Imagick extension
Copyright (C) 2010 by Lee Traynor lee.traynor@skeptic.de

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
any later version.

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.

The full text of the GNU GPL can be found at <http://www.gnu.org/licenses/>.
*/
function tick ()
{
	if (!document.forms[0].fourpoint.checked) document.forms[0].fourpoint.checked = true;
}

function resetori ()
{
	document.getElementById ("origin").innerHTML = "Origin not set";
	theform = document.forms[0];
	theform.orix.value = "";
	theform.oriy.value = "";
	for (i = 0; i < 4; i++)
	{
		theform.elements[(4 + i * 2)].value = "";
		theform.elements[(5 + i * 2)].value = "";
	}
	theform.rotate.value = 0;
	theform.db.value = 0;
	theform.sx.value = 0;
	theform.sy.value = 0;
	theform.fourpoint.checked = false;
}

function coords (e)
{
	if (!e) e = window.event;
	theform = document.forms[0];
	if (e.pageX || e.pageY)
	{
		posx = e.pageX;
		posy = e.pageY;
	}
	else if (e.clientX || e.clientY)
	{
		posx = e.clientX;
		posy = e.clientY;
	}
	if (theform.orix.value == "" && theform.oriy.value == "")
	{
		theform.orix.value = posx;
		theform.oriy.value = posy;
		document.getElementById ("origin").innerHTML = "Origin set: " + posx + ", " + posy;
	} else
	{
		entry = false;
		for (i = 0; i < 4; i++)
		{
			if (!entry && (theform.elements[(4 + i * 2)].value == "" || theform.elements[(4 + i * 2)].value == "0"))
			{
				theform.elements[(4 + i * 2)].value = 2 * Math.round ((parseInt (posx) - parseInt (theform.orix.value)) * theform.scale.value);
				theform.elements[(5 + i * 2)].value = 2 * Math.round ((parseInt (posy) - parseInt (theform.oriy.value)) * theform.scale.value);
				entry = true;
			}
		}
		theform.fourpoint.checked = true;
	}
}

function check_lock ()
{
	if (document.forms[0].stretchlock.checked) document.forms[0].stretchy.value = document.forms[0].stretchx.value;
}