<?php
# $Id: mod_measure.php 267 2006-05-12 12:16:01Z vera_schulze $
# http://www.mapbender.org/index.php/mod_measure.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("../../conf/mapbender.conf");

$gui_id = $_REQUEST["gui_id"];
$con = db_connect($DBSERVER,$OWNER,$PW);
db_select_db(DB,$con);
$sql = "SELECT e_src, e_target FROM gui_element WHERE e_id = 'measure' AND fkey_gui_id = $1";
$v = array($gui_id);
$t = array('s');
$res = db_prep_query($sql, $v, $t);
$cnt = 0;
while($row = db_fetch_array($res)){ 
	$e_src = $row["e_src"];
	$e_target = $row["e_target"];
	$cnt++;
}
if($cnt > 1){
	echo "alert('measure: ID not unique!');";
}
echo "var mod_measure_target = '".$e_target."';";

require_once("ajax_jquery.js");
$e_id_css = "measure";
include '../include/dyn_js.php';
?>

var mod_measure_color1 = "white";
var mod_measure_color2 = "black";
var mod_measure_font = "Arial, Helvetica, sans-serif";
var mod_measure_fontsize = "9px";
var mod_measure_basepoint = "#8a2be2";
var mod_measure_linepoint = "#ff00ff";
var mod_measure_bg = "";
var mod_measure_pgsql = true;

var mod_measure_win = null;

var mod_measure_elName = "measure";
var mod_measure_frameName = "";
var mod_measure_epsg;
var mod_measure_width;
var mod_measure_height;
var dist = false;
var mod_measure_RX = new Array();
var mod_measure_RY = new Array();
var mod_measure_Dist = new Array();
var mod_measure_TotalDist = new Array();
var mod_measureSubFunctions = new Array();

var mod_measure_img_on = new Image(); mod_measure_img_on.src = "<?php  echo preg_replace("/_off/","_on",$e_src);  ?>";
var mod_measure_img_off = new Image(); mod_measure_img_off.src = "<?php  echo $e_src;  ?>";
var mod_measure_img_over = new Image(); mod_measure_img_over.src = "<?php  echo preg_replace("/_off/","_over",$e_src);  ?>";

function init_mod_measure(ind){
	mb_button[ind] = document.getElementById(mod_measure_elName);
	mb_button[ind].img_over = mod_measure_img_over.src;
	mb_button[ind].img_on = mod_measure_img_on.src;
	mb_button[ind].img_off = mod_measure_img_off.src;
	mb_button[ind].status = 0;
	mb_button[ind].elName = mod_measure_elName;
	mb_button[ind].fName = mod_measure_frameName;
	mb_button[ind].go = new Function ("mod_measure_go()");
	mb_button[ind].stop = new Function ("mod_measure_disable()");
	var ind = getMapObjIndexByName(mod_measure_target);
	mod_measure_width = mb_mapObj[ind].width;
	mod_measure_height = mb_mapObj[ind].height;
	mod_measure_epsg = mb_mapObj[ind].epsg;
	mb_registerSubFunctions("drawDashedLine()");
	mb_registerPanSubElement("measuring");
}
function register_measureSubFunctions(stringFunction){
	mod_measureSubFunctions[mod_measureSubFunctions.length] = stringFunction;
}
function mod_measure_go(){
	var el = window.frames[mod_measure_target].document;
	el.onmousedown = mod_measure_start;
	//el.onmousemove = mod_measure_run;
	var measureSub = "";
	for(var i=0; i<mod_measureSubFunctions.length; i++){
		measureSub += eval(mod_measureSubFunctions[i]);
	}   
	writeTag(mod_measure_target,"measure_sub",measureSub);
}
function mod_measure_disable(){
	var el = window.frames[mod_measure_target].document; 
	el.onmousedown = null;
	el.onmousemove = null;
	writeTag(mod_measure_target,"measure_display","");
	writeTag(mod_measure_target,"measure_sub","");
}
function mod_measure_timeout(){
	var el = window.frames[mod_measure_target].document; 
	el.onmousedown = null;
	el.ondblclick = null;
	el.onmousemove = null;
}
function mod_measure_disableTimeout(){
	var el = window.frames[mod_measure_target].document;
	el.onmousedown = mod_measure_start;
	//el.onmousemove = mod_measure_run;
}
function use_dist() {
    if(dist != false){
        mod_measure_Dist[mod_measure_Dist.length] = dist;
		var totalDist = mod_measure_TotalDist[mod_measure_TotalDist.length-1] + dist;
       	mod_measure_TotalDist[mod_measure_TotalDist.length] = Math.round(totalDist * 100)/100;
        
      } 
      drawDashedLine(); 
      dist = false;
}
function mod_measure_start(e){
	mb_getMousePos(e,mod_measure_target);
	var realWorldPos = my_makeClickPos2RealWorldPos(mod_measure_target,clickX,clickY);
    
	mod_measure_RX[mod_measure_RX.length] = realWorldPos[0];
	mod_measure_RY[mod_measure_RY.length] = realWorldPos[1];
       
     if(mod_measure_RX.length > 1){
	 
     convert_coords(mod_measure_RX[mod_measure_RX.length-2],mod_measure_RY[mod_measure_RY.length-2],mod_measure_RX[mod_measure_RX.length-1],mod_measure_RY[mod_measure_RY.length-1],inputEPSG);         
	}
	else{
		mod_measure_Dist[mod_measure_Dist.length] = 0;
		mod_measure_TotalDist[mod_measure_TotalDist.length] = 0;
        drawDashedLine();
	}
}
function drawDashedLine(){
	var str_mPoints = "<div style='position:absolute;left:0px;top:0px' ><img src='"+mb_trans.src+"' width='"+mod_measure_width+"' height='0'></div>";
	str_mPoints += "<div style='position:absolute;left:0px;top:0px' ><img src='"+mb_trans.src+"' width='0' height='"+mod_measure_height+"'></div>";
	for(var i=0; i<mod_measure_RX.length; i++){
		var pos = makeRealWorld2mapPos(mod_measure_target,mod_measure_RX[i],mod_measure_RY[i]);
		str_mPoints += "<div style='font-size:1px;position:absolute;top:"+(pos[1]-2)+"px;left:"+(pos[0]-2)+"px;width:4px;height:4px;background-color:"+mod_measure_basepoint+"'></div>";
		if(i>0){
			str_mPoints += "<div  style='font-family:"+mod_measure_font+";font-size:"+mod_measure_fontsize+";color:"+mod_measure_color1+";";
			if(mod_measure_bg != ""){
				str_mPoints += "background-color:"+mod_measure_bg+";";
			}
			str_mPoints += "position:absolute;top:"+(pos[1] + 3)+"px;left:"+(pos[0]+3)+"px;z-index:20'>"+mod_measure_TotalDist[i]+"</div>";
			str_mPoints += "<div  style='font-family:"+mod_measure_font+";font-size:"+mod_measure_fontsize+";color:"+mod_measure_color2+";position:absolute;top:"+(pos[1] + 4)+"px;left:"+(pos[0]+4)+"px;z-index:21'>"+mod_measure_TotalDist[i]+"</div>";
		}
	}
	if(mod_measure_RX.length>1){
		for(var k=1; k<mod_measure_RX.length; k++){
			var pos0 = makeRealWorld2mapPos(mod_measure_target,mod_measure_RX[k], mod_measure_RY[k]);
			var pos1 = makeRealWorld2mapPos(mod_measure_target,mod_measure_RX[k-1], mod_measure_RY[k-1]);
          
			str_mPoints += evaluateDashes(pos1[0],pos1[1],pos0[0],pos0[1],k);
		}
	}
	writeTag(mod_measure_target,"measuring",str_mPoints);
}
function evaluateDashes(x1,y1,x2,y2,count){
	var str_dashedLine = "";
	var s = 10;
	var d = Math.sqrt(Math.pow((y1-y2),2) + Math.pow((x1-x2),2)) ;
	var n = Math.round(d/s);
	var s_x =  (x2 - x1)/n;
	var s_y =  (y2 - y1)/n;
	for(var i=1; i<n; i++){
		var x = Math.round(x1 + i * s_x)-2;
		var y = Math.round(y1 + i * s_y)-2;
		if(x >= 0 && x <= mod_measure_width && y >= 0 && y <= mod_measure_height){
			str_dashedLine += "<div style='font-size:1px;position:absolute;top:"+y+"px;left:"+x+"px;width:4px;height:4px;background-color:"+mod_measure_linepoint+"'></div>";
		}
	}
	str_dashedLine += "<div style='font-family:"+mod_measure_font+";font-size:"+mod_measure_fontsize+";color:"+mod_measure_color1+";";
	if(mod_measure_bg != ""){
		str_dashedLine += "background-color:"+mod_measure_bg+";";
	}   
	str_dashedLine += "position:absolute;top:"+(Math.round(y1 + (y2-y1)/2 +3))+"px;left:"+(Math.round(x1 + (x2-x1)/2 +3))+"px'>"+mod_measure_Dist[count]+"</div>";
	str_dashedLine += "<div style='font-family:"+mod_measure_font+";font-size:"+mod_measure_fontsize+";color:"+mod_measure_color2+";position:absolute;top:"+(Math.round(y1 + (y2-y1)/2 + 4))+"px;left:"+(Math.round(x1 + (x2-x1)/2+4))+"px'>"+mod_measure_Dist[count]+"</div>";
	return str_dashedLine;
}
function mod_measure_close(){
	if(mod_measure_RX.length < 3 || (mod_measure_RX[mod_measure_RX.length-1] == mod_measure_RX[0] && mod_measure_RY[mod_measure_RY.length-1] == mod_measure_RY[0])){return;}
	mod_measure_RX[mod_measure_RX.length] = mod_measure_RX[0];
	mod_measure_RY[mod_measure_RY.length] = mod_measure_RY[0];
	if(mod_measure_RX.length > 1){
		// circumference
        convert_coords(mod_measure_RX[mod_measure_RX.length-2],mod_measure_RY[mod_measure_RY.length-2],mod_measure_RX[mod_measure_RX.length-1],mod_measure_RY[mod_measure_RY.length-1],inputEPSG);   
	}
	else{
		mod_measure_Dist[mod_measure_Dist.length] = 0;
		mod_measure_TotalDist[mod_measure_TotalDist.length] = 0;
        drawDashedLine();
	}
}
function mod_measure_delete(){
	mod_measure_RX = new Array();
	mod_measure_RY = new Array();
    mod_measure_Dist = new Array();
	mod_measure_TotalDist = new Array();
    dist = false;
    writeTag(mod_measure_target,"measuring","");
	writeTag(mod_measure_target,"measure_display","");
}
function my_makeClickPos2RealWorldPos(frameName, myClickX, myClickY) {
	var ind = getMapObjIndexByName(frameName);
	var width = parseInt(mb_mapObj[ind].width);
	var height = parseInt(mb_mapObj[ind].height);
	var arrayBBox = mb_mapObj[ind].extent.split(",");
	var minX = parseFloat(arrayBBox[0]);
	var minY = parseFloat(arrayBBox[1]);
	var maxX = parseFloat(arrayBBox[2]);
	var maxY = parseFloat(arrayBBox[3]);
	var xtentx = maxX - minX;
	var xtenty =  maxY - minY;
	var posX = parseFloat(minX + (myClickX / width) * xtentx);
	var posY = parseFloat(maxY - (myClickY / height) * xtenty);
	return new Array(posX, posY);
}
function convert_coords(x1,y1,x2,y2,inputEPSG){

      $.post(
    	// zielurl
        '../javascripts/transform_coordinatesWGS84.php',
        // parameter fuer diese datei
        {
        	'x1'      : x1,
            'y1'      : y1,
			'x2'      : x2,
			'y2'      : y2,  
            'inputEPSG' :  inputEPSG      
        },
        // callback function
        function(xml){
            dist = Math.round(parseFloat(xml));   
            use_dist();   
        }
     );
}