/*
JavaScript Scalebar for MapServer (scalebar.js)

Copyright (c) 2005 Tim Schaub of CommEn Space (http://www.commenspace.org)

This is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at
your option) any later version.

This software 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 Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this software; if not, write to the Free Software Foundation,
Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

*/

/** With some modifications by Armin Burger for use in p.mapper **/ 

 function scalebar_init(){pm_scaleBar=new ScaleBar(1);pm_scaleBar.divisions=4;pm_scaleBar.subdivisions=2;pm_scaleBar.resolution=128;pm_scaleBar.minWidth=198;pm_scaleBar.maxWidth=220;pm_scaleBar.abbreviateLabel=true;pm_scaleBar.place('scalebar');pm_scaleBar.update(PMap.s1);$("#scalebar").showv();$("#pmMapRefreshImg").bind("load",function(e){pm_scaleBar.update(PMap.scale);});};function ScaleBar(scaleDenominator){this.scaleDenominator=(scaleDenominator==null)?1 : scaleDenominator;this.displaySystem='metric';this.minWidth=100;this.maxWidth=200;this.divisions=2;this.subdivisions=2;this.showMinorMeasures=false;this.abbreviateLabel=false;this.singleLine=false;this.resolution=72;this.align='center';this.container=document.createElement('div');this.container.className='sbWrapper';this.labelContainer=document.createElement('div');this.labelContainer.className='sbUnitsContainer';this.labelContainer.style.position='absolute';this.graphicsContainer=document.createElement('div');this.graphicsContainer.style.position='absolute';this.graphicsContainer.className='sbGraphicsContainer';this.numbersContainer=document.createElement('div');this.numbersContainer.style.position='absolute';this.numbersContainer.className='sbNumbersContainer';var markerMajor=document.createElement('div');markerMajor.className='sbMarkerMajor';this.graphicsContainer.appendChild(markerMajor);var markerMinor=document.createElement('div');markerMinor.className='sbMarkerMinor';this.graphicsContainer.appendChild(markerMinor);var barPiece=document.createElement('div');barPiece.className='sbBar';this.graphicsContainer.appendChild(barPiece);var barPieceAlt=document.createElement('div');barPieceAlt.className='sbBarAlt';this.graphicsContainer.appendChild(barPieceAlt);};ScaleBar.prototype.update=function(scaleDenominator){if(scaleDenominator !=null){this.scaleDenominator=scaleDenominator;};function HandsomeNumber(smallUglyNumber,bigUglyNumber,sigFigs){var sigFigs=(sigFigs==null)?10 : sigFigs;var bestScore=Number.POSITIVE_INFINITY;var bestTieBreaker=Number.POSITIVE_INFINITY;var handsomeValue=smallUglyNumber;var handsomeNumDec=3;for(var halvingExp=0;halvingExp<3;++halvingExp){var comelyMultiplicand=Math.pow(2,(-1*halvingExp));var maxTensExp=Math.floor(Math.log(bigUglyNumber/comelyMultiplicand)/Math.LN10);for(var tensExp=maxTensExp;tensExp>(maxTensExp-sigFigs+1);--tensExp){var numDec=Math.max(halvingExp-tensExp,0);var testMultiplicand=comelyMultiplicand*Math.pow(10,tensExp);if((testMultiplicand*Math.floor(bigUglyNumber/testMultiplicand))>=smallUglyNumber){if(smallUglyNumber % testMultiplicand==0){var testMultiplier=smallUglyNumber/testMultiplicand;}else{var testMultiplier=Math.floor(smallUglyNumber/testMultiplicand)+1;};var testScore=testMultiplier+(2*halvingExp);var testTieBreaker=(tensExp<0)?(Math.abs(tensExp)+1): tensExp;if((testScore<bestScore)||((testScore==bestScore)&&(testTieBreaker<bestTieBreaker))){bestScore=testScore;bestTieBreaker=testTieBreaker;handsomeValue=(testMultiplicand*testMultiplier).toFixed(numDec);handsomeNumDec=numDec;}}}};this.value=handsomeValue;this.score=bestScore;this.tieBreaker=bestTieBreaker;this.numDec=handsomeNumDec;};HandsomeNumber.prototype.toString=function(){return this.value.toString();};HandsomeNumber.prototype.valueOf=function(){return this.value;};function styleValue(aSelector,styleKey){var aValue=0;if(document.styleSheets){for(var sheetIndex=document.styleSheets.length-1;sheetIndex>=0;--sheetIndex){var aSheet=document.styleSheets[sheetIndex];if(!aSheet.disabled){var allRules;if(typeof(aSheet.cssRules)=='undefined'){if(typeof(aSheet.rules)=='undefined'){return 0;}else{allRules=aSheet.rules;}}else{allRules=aSheet.cssRules;};for(var ruleIndex=0;ruleIndex<allRules.length;++ruleIndex){var aRule=allRules[ruleIndex];if(aRule.selectorText&&(aRule.selectorText.toLowerCase()==aSelector.toLowerCase())){if(aRule.style[styleKey] !=''){aValue=parseInt(aRule.style[styleKey]);}}}}}};return aValue?aValue : 0;};function formatNumber(aNumber,numDecimals){numDecimals=(numDecimals)?numDecimals : 0;var formattedInteger=''+Math.round(aNumber);var thousandsPattern=/(-?[0-9]+)([0-9]{3})/;while(thousandsPattern.test(formattedInteger)){formattedInteger=formattedInteger.replace(thousandsPattern,'$1,$2');};if(numDecimals>0){var formattedDecimal=Math.floor(Math.pow(10,numDecimals)*(aNumber-Math.round(aNumber)));if(formattedDecimal==0){return formattedInteger;}else{return formattedInteger+'.'+formattedDecimal;}}else{return formattedInteger;}};this.container.title='scale 1:'+formatNumber(this.scaleDenominator);var measurementProperties=new Object();measurementProperties.english={units: ['miles','feet','inches'],abbr: ['mi','ft','in'],inches: [63360,12,1]};measurementProperties.metric={units: ['kilometers','meters','centimeters'],abbr: ['km','m','cm'],inches: [39370.07874,39.370079,0.393701]};var comparisonArray=new Array();for(var unitIndex=0;unitIndex<measurementProperties[this.displaySystem].units.length;++unitIndex){comparisonArray[unitIndex]=new Object();var pixelsPerDisplayUnit=this.resolution*measurementProperties[this.displaySystem].inches[unitIndex]/this.scaleDenominator;var minSDDisplayLength=(this.minWidth/pixelsPerDisplayUnit)/(this.divisions*this.subdivisions);var maxSDDisplayLength=(this.maxWidth/pixelsPerDisplayUnit)/(this.divisions*this.subdivisions);for(var valueIndex=0;valueIndex<(this.divisions*this.subdivisions);++valueIndex){var minNumber=minSDDisplayLength*(valueIndex+1);var maxNumber=maxSDDisplayLength*(valueIndex+1);var niceNumber=new HandsomeNumber(minNumber,maxNumber);comparisonArray[unitIndex][valueIndex]={value:(niceNumber.value/(valueIndex+1)),score: 0,tieBreaker: 0,numDec: 0,displayed: 0};for(var valueIndex2=0;valueIndex2<(this.divisions*this.subdivisions);++valueIndex2){displayedValuePosition=niceNumber.value*(valueIndex2+1)/(valueIndex+1);niceNumber2=new HandsomeNumber(displayedValuePosition,displayedValuePosition);var isMajorMeasurement=((valueIndex2+1)% this.subdivisions==0);var isLastMeasurement=((valueIndex2+1)==(this.divisions*this.subdivisions));if((this.singleLine&&isLastMeasurement)||(!this.singleLine&&(isMajorMeasurement||this.showMinorMeasures))){comparisonArray[unitIndex][valueIndex].score+=niceNumber2.score;comparisonArray[unitIndex][valueIndex].tieBreaker+=niceNumber2.tieBreaker;comparisonArray[unitIndex][valueIndex].numDec=Math.max(comparisonArray[unitIndex][valueIndex].numDec,niceNumber2.numDec);comparisonArray[unitIndex][valueIndex].displayed+=1;}else{comparisonArray[unitIndex][valueIndex].score+=niceNumber2.score/this.subdivisions;comparisonArray[unitIndex][valueIndex].tieBreaker+=niceNumber2.tieBreaker/this.subdivisions;}};var scoreAdjustment=(unitIndex+1)*comparisonArray[unitIndex][valueIndex].tieBreaker/comparisonArray[unitIndex][valueIndex].displayed;comparisonArray[unitIndex][valueIndex].score*=scoreAdjustment;}};var subdivisionDisplayLength=null;var displayUnits=null;var displayUnitsAbbr=null;var subdivisionPixelLength=null;var bestScore=Number.POSITIVE_INFINITY;var bestTieBreaker=Number.POSITIVE_INFINITY;var numDec=0;for(var unitIndex=0;unitIndex<comparisonArray.length;++unitIndex){for(valueIndex in comparisonArray[unitIndex]){if((comparisonArray[unitIndex][valueIndex].score<bestScore)||((comparisonArray[unitIndex][valueIndex].score==bestScore)&&(comparisonArray[unitIndex][valueIndex].tieBreaker<bestTieBreaker))){bestScore=comparisonArray[unitIndex][valueIndex].score;bestTieBreaker=comparisonArray[unitIndex][valueIndex].tieBreaker;subdivisionDisplayLength=comparisonArray[unitIndex][valueIndex].value;numDec=comparisonArray[unitIndex][valueIndex].numDec;displayUnits=measurementProperties[this.displaySystem].units[unitIndex];displayUnitsAbbr=measurementProperties[this.displaySystem].abbr[unitIndex];pixelsPerDisplayUnit=this.resolution*measurementProperties[this.displaySystem].inches[unitIndex]/this.scaleDenominator;subdivisionPixelLength=pixelsPerDisplayUnit*subdivisionDisplayLength;}}};var xOffsetMarkerMajor=(styleValue('.sbMarkerMajor','borderLeftWidth')+styleValue('.sbMarkerMajor','width')+styleValue('.sbMarkerMajor','borderRightWidth'))/2;var xOffsetMarkerMinor=(styleValue('.sbMarkerMinor','borderLeftWidth')+styleValue('.sbMarkerMinor','width')+styleValue('.sbMarkerMinor','borderRightWidth'))/2;var xOffsetBar=(styleValue('.sbBar','borderLeftWidth')+styleValue('.sbBar','borderRightWidth'))/2;var xOffsetBarAlt=(styleValue('.sbBarAlt','borderLeftWidth')+styleValue('.sbBarAlt','borderRightWidth'))/2;if(!document.styleSheets){xOffsetMarkerMajor=0.5;xOffsetMarkerMinor=0.5;}while(this.labelContainer.hasChildNodes()){this.labelContainer.removeChild(this.labelContainer.firstChild);}while(this.graphicsContainer.hasChildNodes()){this.graphicsContainer.removeChild(this.graphicsContainer.firstChild);}while(this.numbersContainer.hasChildNodes()){this.numbersContainer.removeChild(this.numbersContainer.firstChild);};var aMarker,aBarPiece,numbersBox,xOffset;var alignmentOffset={left: 0,center:(-1*this.divisions*this.subdivisions*subdivisionPixelLength/2),right:(-1*this.divisions*this.subdivisions*subdivisionPixelLength)};var xPosition=0+alignmentOffset[this.align];var markerMeasure=0;for(var divisionIndex=0;divisionIndex<this.divisions;++divisionIndex){xPosition=divisionIndex*this.subdivisions*subdivisionPixelLength;xPosition+=alignmentOffset[this.align];markerMeasure=(divisionIndex==0)?0 :((divisionIndex*this.subdivisions)*subdivisionDisplayLength).toFixed(numDec);aMarker=document.createElement('div');aMarker.className='sbMarkerMajor';aMarker.style.position='absolute';aMarker.style.overflow='hidden';aMarker.style.left=Math.round(xPosition-xOffsetMarkerMajor)+'px';aMarker.appendChild(document.createTextNode(' '));this.graphicsContainer.appendChild(aMarker);if(!this.singleLine){numbersBox=document.createElement('div');numbersBox.className='sbNumbersBox';numbersBox.style.position='absolute';numbersBox.style.overflow='hidden';numbersBox.style.textAlign='center';if(this.showMinorMeasures){numbersBox.style.width=Math.round(subdivisionPixelLength*2)+'px';numbersBox.style.left=Math.round(xPosition-subdivisionPixelLength)+'px';}else{numbersBox.style.width=Math.round(this.subdivisions*subdivisionPixelLength*2)+'px';numbersBox.style.left=Math.round(xPosition-(this.subdivisions*subdivisionPixelLength))+'px';};numbersBox.appendChild(document.createTextNode(markerMeasure));this.numbersContainer.appendChild(numbersBox);};for(var subdivisionIndex=0;subdivisionIndex<this.subdivisions;++subdivisionIndex){aBarPiece=document.createElement('div');aBarPiece.style.position='absolute';aBarPiece.style.overflow='hidden';aBarPiece.style.width=Math.round(subdivisionPixelLength)+'px';if((subdivisionIndex % 2)==0){aBarPiece.className='sbBar';aBarPiece.style.left=Math.round(xPosition-xOffsetBar)+'px';}else{aBarPiece.className='sbBarAlt';aBarPiece.style.left=Math.round(xPosition-xOffsetBarAlt)+'px';};aBarPiece.appendChild(document.createTextNode(' '));this.graphicsContainer.appendChild(aBarPiece);if(subdivisionIndex<(this.subdivisions-1)){xPosition=((divisionIndex*this.subdivisions)+(subdivisionIndex+1))*subdivisionPixelLength;xPosition+=alignmentOffset[this.align];markerMeasure=(divisionIndex*this.subdivisions+subdivisionIndex+1)*subdivisionDisplayLength;aMarker=document.createElement('div');aMarker.className='sbMarkerMinor';aMarker.style.position='absolute';aMarker.style.overflow='hidden';aMarker.style.left=Math.round(xPosition-xOffsetMarkerMinor)+'px';aMarker.appendChild(document.createTextNode(' '));this.graphicsContainer.appendChild(aMarker);if(this.showMinorMeasures&&!this.singleLine){numbersBox=document.createElement('div');numbersBox.className='sbNumbersBox';numbersBox.style.position='absolute';numbersBox.style.overflow='hidden';numbersBox.style.textAlign='center';numbersBox.style.width=Math.round(subdivisionPixelLength*2)+'px';numbersBox.style.left=Math.round(xPosition-subdivisionPixelLength)+'px';numbersBox.appendChild(document.createTextNode(markerMeasure));this.numbersContainer.appendChild(numbersBox);}}}};xPosition=(this.divisions*this.subdivisions)*subdivisionPixelLength;xPosition+=alignmentOffset[this.align];markerMeasure=((this.divisions*this.subdivisions)*subdivisionDisplayLength).toFixed(numDec);aMarker=document.createElement('div');aMarker.className='sbMarkerMajor';aMarker.style.position='absolute';aMarker.style.overflow='hidden';aMarker.style.left=Math.round(xPosition-xOffsetMarkerMajor)+'px';aMarker.appendChild(document.createTextNode(' '));this.graphicsContainer.appendChild(aMarker);if(!this.singleLine){numbersBox=document.createElement('div');numbersBox.className='sbNumbersBox';numbersBox.style.position='absolute';numbersBox.style.overflow='hidden';numbersBox.style.textAlign='center';if(this.showMinorMeasures){numbersBox.style.width=Math.round(subdivisionPixelLength*2)+'px';numbersBox.style.left=Math.round(xPosition-subdivisionPixelLength)+'px';}else{numbersBox.style.width=Math.round(this.subdivisions*subdivisionPixelLength*2)+'px';numbersBox.style.left=Math.round(xPosition-(this.subdivisions*subdivisionPixelLength))+'px';};numbersBox.appendChild(document.createTextNode(markerMeasure));this.numbersContainer.appendChild(numbersBox);};var labelBox=document.createElement('div');labelBox.style.position='absolute';var labelText;if(this.singleLine){labelText=markerMeasure;labelBox.className='sbLabelBoxSingleLine';labelBox.style.top='-0.6em';labelBox.style.left=(xPosition+10)+'px';}else{labelText='';labelBox.className='sbLabelBox';labelBox.style.left=Math.round(alignmentOffset[this.align])-25+'px';labelBox.style.width='20px';labelBox.style.overflow='hidden';};if(this.abbreviateLabel){labelText+=' '+displayUnitsAbbr;}else{labelText+=' '+displayUnits;};labelBox.appendChild(document.createTextNode(labelText));this.labelContainer.appendChild(labelBox);if(!document.styleSheets){var defaultStyle=document.createElement('style');defaultStyle.type='text/css';var styleText='.sbBar{top: 0px;background: #666666;height: 1px;border: 0;}';styleText+='.sbBarAlt{top: 0px;background: #666666;height: 1px;border: 0;}';styleText+='.sbMarkerMajor{height: 7px;width: 1px;background: #666666;border: 0;}';styleText+='.sbMarkerMinor{height: 5px;width: 1px;background: #666666;border: 0;}';styleText+='.sbLabelBox{top:-16px;}';styleText+='.sbNumbersBox{top: 7px;}';defaultStyle.appendChild(document.createTextNode(styleText));document.getElementsByTagName('head').item(0).appendChild(defaultStyle);};this.container.appendChild(this.graphicsContainer);this.container.appendChild(this.labelContainer);this.container.appendChild(this.numbersContainer);};ScaleBar.prototype.place=function(elementId){if(elementId==null){document.body.appendChild(this.container);}else{var anElement=document.getElementById(elementId);if(anElement !=null){anElement.appendChild(this.container);}};this.update();};