WebRoot/caozuoyuan/js/library/flot/jquery.flot.orderBars.js

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/*
 * Flot plugin to order bars side by side.
 * 
 * Released under the MIT license by Benjamin BUFFET, 20-Sep-2010.
 *
 * This plugin is an alpha version.
 *
 * To activate the plugin you must specify the parameter "order" for the specific serie :
 *
 *  $.plot($("#placeholder"), [{ data: [ ... ], bars :{ order = null or integer }])
 *
 * If 2 series have the same order param, they are ordered by the position in the array;
 *
 * The plugin adjust the point by adding a value depanding of the barwidth
 * Exemple for 3 series (barwidth : 0.1) :
 *
 *          first bar décalage : -0.15
 *          second bar décalage : -0.05
 *          third bar décalage : 0.05
 *
 */

(function($){
    function init(plot){
        var orderedBarSeries;
        var nbOfBarsToOrder;
        var borderWidth;
        var borderWidthInXabsWidth;
        var pixelInXWidthEquivalent = 1;
        var isHorizontal = false;

        /*
         * This method add shift to x values
         */
        function reOrderBars(plot, serie, datapoints){
            var shiftedPoints = null;
            
            if(serieNeedToBeReordered(serie)){                
                checkIfGraphIsHorizontal(serie);
                calculPixel2XWidthConvert(plot);
                retrieveBarSeries(plot);
                calculBorderAndBarWidth(serie);
                
                if(nbOfBarsToOrder >= 2){  
                    var position = findPosition(serie);
                    var decallage = 0;
                    
                    var centerBarShift = calculCenterBarShift();

                    if (isBarAtLeftOfCenter(position)){
                        decallage = -1*(sumWidth(orderedBarSeries,position-1,Math.floor(nbOfBarsToOrder / 2)-1)) - centerBarShift;
                    }else{
                        decallage = sumWidth(orderedBarSeries,Math.ceil(nbOfBarsToOrder / 2),position-2) + centerBarShift + borderWidthInXabsWidth*2;
                    }

                    shiftedPoints = shiftPoints(datapoints,serie,decallage);
                    datapoints.points = shiftedPoints;
               }
           }
           return shiftedPoints;