<?php
# $Id$
# http://www.mapbender.org/index.php/mod_dragMapSize.php
# Copyright (C) 2002 CCGIS 
#
# 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 2, or (at your option)
# 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.
#
# 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.

require_once(dirname(__FILE__)."/../php/mb_validateSession.php");
echo "var mod_dragMapSize_target = '".$e_target[0]."';";
?>
var mod_dragMapSize_offset  = 15;
var mod_dragMapSize_active  = false;

eventInit.register(function () {
	mod_dragMapSize_init();
});

eventAfterMapRequest.register(function () {
	mod_dragMapSize_arrange()
});

function mod_dragMapSize_arrange(){
	var left = parseInt(document.getElementById(mod_dragMapSize_target).style.left) + 
				parseInt(document.getElementById(mod_dragMapSize_target).style.width) + 
				mod_dragMapSize_offset - 
				(parseInt(document.getElementById('dragMapSize').style.width)/2);
	var top = parseInt(document.getElementById(mod_dragMapSize_target).style.top) + 
				parseInt(document.getElementById(mod_dragMapSize_target).style.height) + 
				mod_dragMapSize_offset - 
				(parseInt(document.getElementById('dragMapSize').style.height)/2);
	mb_arrangeElement('','dragMapSize' , left, top);
}

function mod_dragMapSize_init(){
	var el = document.getElementById("dragMapSize");
	el.onmousedown = mod_dragMapSize_down;
	mod_dragMapSize_arrange();
}

function mod_dragMapSize_down(e){
	if(mod_dragMapSize_active == false){
		document.onmouseup = mod_dragMapSize_up;
		document.onmousemove = mod_dragMapSize_drag;
		
		mb_getMousePos(e);
		mb_start_x = clickX;
		mb_start_y = clickY;
		mb_end_x = clickX;
		mb_end_y = clickY;
		mod_dragMapSize_active = true;

		//create a div that catches all mouse interactions
		var dragElement = document.getElementById("dragMapSize");
		var mouseCatcher = dragElement.parentNode.appendChild(document.createElement('div'));
		mouseCatcher.setAttribute("id", "dragMapSize_helper");
		mouseCatcher.style.position = "absolute";
		mouseCatcher.style.cursor = "move";
		mouseCatcher.style.width = 500;
		mouseCatcher.style.height = 500;
		mouseCatcher.style.zIndex = 160;
		if($.browser.msie)
			mouseCatcher.style.background = "url(../img/transparent.gif)"; 
		mouseCatcher.style.left=clickX-250;
		mouseCatcher.style.top=clickY-250;
		
		return false;
	}
}

function mod_dragMapSize_up(e){	
	document.onmouseup = null;
	document.onmousemove = null;
	
	var mouseCatcher = document.getElementById("dragMapSize_helper");
	mouseCatcher.parentNode.removeChild(mouseCatcher);
	
	mod_dragMapSize_active = false;
	mb_getMousePos(e);
	mb_end_x = clickX;
	mb_end_y = clickY;
	targetObject = getMapObjByName(mod_dragMapSize_target);
	var dif_x = (parseFloat(mb_end_x) - parseFloat(mb_start_x));
	var dif_y = (parseFloat(mb_end_y) - parseFloat(mb_start_y));
	
	if(parseFloat(targetObject.width) + parseFloat(dif_x)<0 ||
		parseFloat(targetObject.height) + parseFloat(dif_y)<0)
	{
		var dif_x = mb_start_x - (parseInt(document.getElementById('dragMapSize').style.width) / 2);
		var dif_y = mb_start_y - (parseInt(document.getElementById('dragMapSize').style.height) / 2);
		mb_arrangeElement('', "dragMapSize", dif_x, dif_y);
		return;
	}
	var newX = (parseFloat(targetObject.width) + parseFloat(dif_x));
	var newY = (parseFloat(targetObject.height) + parseFloat(dif_y));
	var pos =  makeClickPos2RealWorldPos(mod_dragMapSize_target, newX, newY);
	targetObject.setWidth(targetObject.getWidth() + parseFloat(dif_x));
	targetObject.setHeight(targetObject.getHeight() + parseFloat(dif_y));

	var mybbox = targetObject.extent;
	if (typeof mybbox !== "string" || mybbox.split(",").length !== 4) {
		return;
	}
	mybbox = mybbox.split(",");
	targetObject.setExtent(mybbox[0], pos[1], pos[0], mybbox[3]);
	targetObject.setMapRequest();
	eventResizeMap.trigger();
}

function mod_dragMapSize_drag(e){
	if(mod_dragMapSize_active){
	  	if (!e)
    		e = window.event;	
		mb_getMousePos(e);
		var dif_x = clickX - (parseInt(document.getElementById('dragMapSize').style.width)/2);
		var dif_y = clickY - (parseInt(document.getElementById('dragMapSize').style.height)/2);
		mb_arrangeElement('', "dragMapSize", dif_x, dif_y);
		mb_arrangeElement('', "dragMapSize_helper", clickX-250, clickY-250);
	}
}