/**********************************************************************
 *
 * $Id: startUp.js,v 1.19 2006/02/07 14:09:38 pspencer Exp $
 *
 * purpose: start up code to bootstrap initialization of kaMap within
 *          the sample interface.  Examples of using many parts of
 *          the kaMap core api.
 *
 * author: Lorenzo Becchi and Andrea Cappugi
 *
 * contributions by Paul Spencer (pspencer@dmsolutions.ca)
 *
 * TODO:
 *
 **********************************************************************
 *
 * Copyright (c) 2005, DM Solutions Group Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 * DEALINGS IN THE SOFTWARE.
 *
 **********************************************************************/

/******************************************************************************
 *
 * To customize startUp:
 * 
 * 1) modify toolbar Layout
 *  act on screen.css file and modify the funcion myMapInitialized(). 
 *  If you change pan and identifyer images edit switchMode() function too.
 * 
 *****************************************************************************/

var myKaMap = myKaNavigator = myKaQuery = myKaRuler = myScalebar = null;
var queryParams = null;

/**
 * parse the query string sent to this window into a global array of key = value pairs
 * this function should only be called once
 */
function parseQueryString()
{
    queryParams = [];
    var s=window.location.search;
    if (s!='')
    {
        s=s.substring( 1 );
        var p=s.split('&');
        for (var i=0;i<p.length;i++)
        {
            var q=p[i].split('=');
            queryParams[q[0]]=q[1];
        }
    }
}

/**
 * get a query value by key.  If the query string hasn't been parsed yet, parse it first.
 * Return an empty string if not found
 */
function getQueryParam(p)
{
    if (!queryParams)
    {
        parseQueryString();
    }
    if (queryParams[p])
        return queryParams[p];
    else 
        return '';
}

function myOnLoad() {
    initDHTMLAPI();
    
	window.onresize=drawPage;
	
	myKaMap = new kaMap( 'viewport' );
    
	var map = getQueryParam('map');
    var extents = getQueryParam('extents');
    var cps = getQueryParam('cps');

    // var myKaScalebar = new kaScalebar( myKaMap, 'scalebar' );
    var myKaLegend = new kaLegend( myKaMap, 'legend', false );
    var myKaKeymap = new kaKeymap( myKaMap, 'keymap' );

    myKaMap.registerForEvent( KAMAP_INITIALIZED, null, myInitialized );
    myKaMap.registerForEvent( KAMAP_MAP_INITIALIZED, null, myMapInitialized );
    myKaMap.registerForEvent( KAMAP_SCALE_CHANGED, null, myScaleChanged );
    myKaMap.registerForEvent( KAMAP_QUERY, null, myQuery );
    myKaMap.registerForEvent( KAMAP_RULER, null, myRuler );
   
    myKaNavigator = new kaNavigator( myKaMap );
    myKaNavigator.activate();
    
    myKaQuery = new kaQuery( myKaMap, KAMAP_POINT_QUERY );
    myKaRuler = new kaRuler( myKaMap, KAMAP_POINT_QUERY );
    
    myScalebar = new ScaleBar(1);
    myScalebar.divisions = 3;
    myScalebar.subdivisions = 2;
    myScalebar.minLength = 150;
    myScalebar.maxLength = 250;
    myScalebar.place('scalebar');

	drawPage();
    myKaMap.initialize( map, extents, cps );
}


/**
 * event handler for KAMAP_INITIALIZED.
 *
 * at this point, ka-Map! knows what map files are available and we have
 * access to them.
 */
function myInitialized() {

    //myMapInitialized( null, myKaMap.getCurrentMap().name );
}

/**
 * event handler for KAMAP_MAP_INITIALIZED
 *
 * the scales are put into a select ... this will be used for zooming
 */ 
function myMapInitialized( eventID, mapName ) {

    //get list of maps and populate the maps select box
    var aMaps = myKaMap.getMaps();
    var oSelect = document.forms[0].maps;
    var j = 0;
    var opt = new Option( 'select a map', '', true, true );
    oSelect[j++] = opt;
    for(var i in aMaps) {
        oSelect[j++] = new Option(aMaps[i].title,aMaps[i].name,false,false);
    }

    //make sure the map is selected ... 
    var oSelect = document.forms[0].maps;
    if (oSelect.options[oSelect.selectedIndex].value != mapName) {
        for(var i = 0; i < oSelect.options.length; i++ ) {
            if (oSelect.options[i].value == mapName) {
                oSelect.options[i].selected = true;
                break;
            }
        }
    }
    //update the scales select
    var currentMap = myKaMap.getCurrentMap();
    var scales = currentMap.getScales();
    var currentScale=myKaMap.getCurrentScale();

    //Insert tools into zoomer div
    
    var iWidth = 6;//width of the zoom to scale item
    var iMaxHeight = 10;//width of the zoom to scale item
    var iMinHeight = 20;//width of the zoom to scale item
    var zoomer="<span style='width:"+(scales.length*iWidth)+"'>";
    for(var i=0; i<scales.length; i++) {
        var zoomTo = 'mySetScale(' +scales[i]+')';
        //var iHeight =  parseInt(i)*2.5+10;
        var iHeight =  iMaxHeight - parseInt((iMaxHeight - iMinHeight) *i/scales.length);

        var zoomImg = '';
        if (scales[i]==currentScale) {
            zoomImg = '<img src="images/pixel-red.png" width="' + iWidth + '" height="' + iHeight + 'px" border="0" onclick="'+zoomTo+'"  title="Zoom to 1:'+scales[i]+'" alt="Zoom to 1:'+scales[i]+'"  id="img'+scales[i]+'"/>';
        } else {
            zoomImg = '<img src="images/pixel-blue.png" width="' + iWidth + '" height="' + iHeight + 'px" border="0" onclick="'+zoomTo+'"  title="Zoom to 1:'+scales[i]+'" alt="Zoom to 1:'+scales[i]+'" id="img'+scales[i]+'"/>';
        }
        zoomer = zoomer  + zoomImg ;
    }
    zoomer=zoomer+"</span>";
    getRawObject('zoomer').innerHTML = zoomer;
    //Activate query button
    switchMode('toolPan');
    
 //   document.getElementById("koordinaten").innerHTML = myKaMap.getCurrentMap().name;  
 
 	leg = '<iframe src="http://www.namibia-forum.ch/kamap/legende.php?map=' +myKaMap.getCurrentMap().name+' " width="100%" height="148px" frameborder="0" name="legende"></iframe>';
//  	leg = '<iframe src="http://nf.lan/kamap/legende.php?map=' +myKaMap.getCurrentMap().name+' " width="100%" height="148px" frameborder="0" name="legende"></iframe>';
    getRawObject('legend2').innerHTML = leg;  
 //   call("http://nf.lan/karten/legende.php",null,hello);

}

function hello(szResult) {
	alert("Hallo Welt");
	getRawObject('legend2').innerHTML = "Hallo Welt";  
}


/**
 * called when kaMap tells us the scale has changed
 */
function myScaleChanged( eventID, scale )
{
    //todo: update scale select and enable/disable zoomin/zoomout
    var currentMap = myKaMap.getCurrentMap();
    var scales = currentMap.getScales();
    for(var i in scales){
        var imgString = 'img'+scales[i];
        var scaleString = 'img'+scale;
        if(getRawObject(imgString)) {
            if(imgString == scaleString) {
                getRawObject(scaleString).src = 'images/pixel-red.png';
            } else {
                getRawObject(imgString).src = 'images/pixel-blue.png'; 
            }
        }
    }
    myScalebar.update(scale);
    if (scale >= 1000000) {
        scale = scale / 1000000;
        scale = scale + " Million";
    }
    var outString = 'current scale 1:'+ scale;
    getRawObject('scale').innerHTML = outString;

}

/**
 * called when the user changes scales.  This will cause the map to zoom to
 * the new scale and trigger a bunch of events, including:
 * KAMAP_SCALE_CHANGED
 * KAMAP_EXTENTS_CHANGED
 */
 function mySetScale( scale )
{
    myKaMap.zoomToScale( scale );
}

/**
 * called when the map selection changes due to the user selecting a new map.  
 * By calling myKaMap.selectMap, this triggers the KAMAP_MAP_INITIALIZED event 
 * after the new map is initialized which, in turn, causes myMapInitialized 
 * to be called
 */
function mySetMap( name )
{
    myKaMap.selectMap( name );
}

function myQuery( eventID, queryType, coords )
{
    var szLayers = '';
    var layers = myKaMap.getCurrentMap().getQueryableLayers();
    for (var i=0;i<layers.length;i++)
    {
        szLayers = szLayers + "," + layers[i].name;
    }
    var extent = myKaMap.getGeoExtents();
    var scale = myKaMap.getCurrentScale();
    var cMap = myKaMap.getCurrentMap().name;

	pos = "[url=http://www.namibia-forum.ch:8080/ka-map/?map=" + cMap + "&cps=" + coords + ","+scale+"]auf Karte zeigen[/url]";
	document.getElementById("koordinaten").innerHTML = pos;
   
}

function myRuler( eventID, queryType, coords )
{
	document.getElementById("koordinaten").innerHTML = coords;  
}


function myZoomIn()
{
    myKaMap.zoomIn();
}

function myZoomOut()
{
    myKaMap.zoomOut();
}

function toggleToolbar(obj)
{
    if (obj.style.backgroundImage == '')
        obj.isOpen = true;
        
    if (obj.isOpen)
    {
        obj.title = 'show toolbar';
        obj.style.backgroundImage = 'url(images/arrow_down.png)';
        var bValue = getObjectTop(obj);;
        var d = getObject('toolbar');
        d.display = "none";
        obj.isOpen = false;
        obj.style.top = "3px";
    }
    else
    {
        obj.title = 'hide toolbar';
        obj.style.backgroundImage = 'url(images/arrow_up.png)';
        var d = getObject('toolbar');
        d.display="block";
        obj.isOpen = true;
        var h = getObjectHeight('toolbar');
        obj.style.top = (h + 3) + "px";
    }
}

function toggleKeymap(obj)
{
    if (obj.style.backgroundImage == '')
        obj.isOpen = true;
        
    if (obj.isOpen)
    {
        obj.title = 'show keymap';
        obj.style.backgroundImage = 'url(images/arrow_left.png)';
        var bValue = getObjectTop(obj);;
        var d = getObject('keymap');
        d.display = "none";
        obj.isOpen = false;
    }
    else
    {
        obj.title = 'hide keymap';
        obj.style.backgroundImage = 'url(images/arrow_right.png)';
        var d = getObject('keymap');
        d.display="block";
        obj.isOpen = true;
    }
}

function toggleReference(obj)
{
    if (obj.style.backgroundImage == '')
        obj.isOpen = true;
        
    if (obj.isOpen)
    {
        obj.title = 'show reference';
        obj.style.backgroundImage = 'url(images/arrow_up.png)';
        var d = getObject('reference');
        d.display = 'none';
        obj.isOpen = false;
        obj.style.bottom = '3px';
    }
    else
    {
        obj.title = 'hide reference';
        obj.style.backgroundImage = 'url(images/arrow_down.png)';
        var d = getObject('reference');
        d.display = 'block';
        obj.isOpen = true;
        obj.style.bottom = (getObjectHeight('reference') + 3) + 'px';
    }
}

function toggleLegend2(obj)
{
    if (obj.style.backgroundImage == '')
        obj.isOpen = true;
        
    if (obj.isOpen)
    {
        obj.title = 'Legende einblenden';
        obj.style.backgroundImage = 'url(images/arrow_up.png)';
        var d = getObject('legend2');
        d.display = 'none';
        obj.isOpen = false;
        obj.style.bottom = '3px';
    }
    else
    {
        obj.title = 'Legende ausblenden';
        obj.style.backgroundImage = 'url(images/arrow_down.png)';
        var d = getObject('legend2');
        d.display = 'block';
        obj.isOpen = true;
        obj.style.bottom = (getObjectHeight('legend2') + 3) + 'px';
    }
}



function dialogToggle( href, szObj )
{
    var obj = getObject(szObj);
    if (obj.display == 'none')
    {
        obj.display = 'block';
        href.childNodes[0].src = 'images/dialog_shut.png';
        
    }
    else
    {
        obj.display = 'none';
        href.childNodes[0].src = 'images/dialog_open.png';
    }
}

/**
 * drawPage - calculate sizes of the various divs to make the app full screen.
 */
function drawPage()
{
    var browserWidth = getInsideWindowWidth();
    var browserHeight = getInsideWindowHeight();
    
    var viewport = getRawObject('viewport');
    
    //Set Viewport Width
    if(myKaMap.isIE4) {
        //terrible hack to avoid IE to show scrollbar
        viewport.style.width = (browserWidth -2) + "px";
    } else {
        viewport.style.width = browserWidth + "px";
    }
    
    //Set Viewport Height
    if(myKaMap.isIE4) {
        //terrible hack to avoid IE to show scrollbar
        viewport.style.height = (browserHeight -2) + "px";
    } else {
        viewport.style.height = browserHeight + "px";
    }
    
    myKaMap.resize();
}

/**
 * getFullExtent
 * ...
 */
function getFullExtent() {
    var exStr = myKaMap.getCurrentMap().defaultExtents.toString();
    var ex = myKaMap.getCurrentMap().defaultExtents;
    myKaMap.zoomToExtents(ex[0],ex[1],ex[2],ex[3]);
}

/**
 * switchMode
 * ...
 */
function switchMode(id){
    if(id=='toolQuery'){
        myKaQuery.activate();
        getRawObject('toolRuler').style.backgroundImage = 'url(images/tool_ruler_1.png)';
        getRawObject('toolQuery').style.backgroundImage = 'url(images/tool_query_2.png)';
        getRawObject('toolPan').style.backgroundImage = 'url(images/tool_pan_1.png)';
    }else if(id=='toolRuler'){
        myKaRuler.activate();
        getRawObject('toolRuler').style.backgroundImage = 'url(images/tool_ruler_2.png)';
        getRawObject('toolQuery').style.backgroundImage = 'url(images/tool_query_1.png)';
        getRawObject('toolPan').style.backgroundImage = 'url(images/tool_pan_1.png)';
    }else if(id=='toolPan'){
        myKaNavigator.activate();
        getRawObject('toolRuler').style.backgroundImage = 'url(images/tool_ruler_1.png)';
        getRawObject('toolQuery').style.backgroundImage = 'url(images/tool_query_1.png)';
        getRawObject('toolPan').style.backgroundImage = 'url(images/tool_pan_2.png)';
    }else{
        myKaNavigator.activate();
    }
}

/*
 *  applyPNGFilter(o)
 *  
 *  Applies the PNG Filter Hack for IE browsers when showing 24bit PNG's
 *
 *  var o = object (this png element in the page)
 *
 * The filter is applied using a nifty feature of IE that allows javascript to
 * be executed as part of a CSS style rule - this ensures that the hack only
 * gets applied on IE browsers :)
 */
function applyPNGFilter(o)
{
    var t="images/a_pixel.gif";
    if( o.src != t ) {
        var s=o.src;
        o.src = t;
        o.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+s+"',sizingMethod='scale')";
    }
}