text: // Licensed to Cloudera, Inc. under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  Cloudera, Inc. licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  
  nv.models.growingMultiBarChart = function() {
    "use strict";
    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------
  
    var multibar = nv.models.growingMultiBar()
      , xAxis = nv.models.axis()
      , yAxis = nv.models.axis()
      , legend = nv.models.legend()
      , controls = nv.models.legend()
      ;
  
    var margin = {top: 30, right: 20, bottom: 50, left: 60}
      , width = null
      , height = null
      , color = nv.utils.defaultColor()
      , showControls = true
      , showLegend = true
      , showXAxis = true
      , showYAxis = true
      , rightAlignYAxis = false
      , reduceXTicks = true // if false a tick will show for every data point
      , staggerLabels = false
      , rotateLabels = 0
      , tooltips = true
      , tooltip = function(key, x, y, e, graph) {
          return '<h3>' + key + '</h3>' +
                 '<p>' +  y + ' on ' + x + '</p>'
        }
      , x //can be accessed via chart.xScale()
      , y //can be accessed via chart.yScale()
      , state = { stacked: false }
      , defaultState = null
      , noData = "No Data Available."
      , dispatch = d3v3.dispatch('tooltipShow', 'tooltipHide', 'stateChange', 'changeState')
      , controlWidth = function() { return showControls ? 180 : 0 }
      , transitionDuration = 250
      , selectBars = null
      , onStateChange = null
      ;
  
    multibar
      .stacked(false)
      ;
    xAxis
      .orient('bottom')
      .tickPadding(7)
      .highlightZero(true)
      .showMaxMin(false)
      .tickFormat(function(d) { return d })
      ;
    yAxis
      .orient((rightAlignYAxis) ? 'right' : 'left')
      .tickFormat(d3v3.format(',.1f'))
      ;
  
    controls.updateState(false);
    //============================================================
  
  
    //============================================================
    // Private Variables
    //------------------------------------------------------------
  
    var showTooltip = function(e, offsetElement) {
      var left = e.pos[0] + ( offsetElement.offsetLeft || 0 ),
          top = e.pos[1] + ( offsetElement.offsetTop || 0),
          x = xAxis.tickFormat()(multibar.x()(e.point, e.pointIndex)),
          y = yAxis.tickFormat()(multibar.y()(e.point, e.pointIndex)),
          content = tooltip(e.point.seriesKey, x, y, e, chart);
  
      nv.tooltip.show([left, top], content, e.value < 0 ? 'n' : 's', null, offsetElement);
    };
  
    //============================================================
  
  
    function chart(selection) {
      selection.each(function(data) {
        var container = d3v3.select(this),
            that = this;
  
        var availableWidth = (width  || parseInt(container.style('width')) || 960)
                               - margin.left - margin.right,
            availableHeight = (height || parseInt(container.style('height')) || 400)
                               - margin.top - margin.bottom;
  
        chart.update = function() { container.transition().duration(transitionDuration).call(chart) };
        chart.container = this;
  
        //set state.disabled
        state.disabled = data.map(function(d) { return !!d.disabled });
  
        if (!defaultState) {
          var key;
          defaultState = {};
          for (key in state) {
            if (state[key] instanceof Array)
              defaultState[key] = state[key].slice(0);
            else
              defaultState[key] = state[key];
          }
        }
        //------------------------------------------------------------
        // Display noData message if there's nothing to show.
  
        if (!data || !data.length || !data.filter(function(d) { return d.values.length }).length) {
          var noDataText = container.selectAll('.nv-noData').data([noData]);
  
          noDataText.enter().append('text')
            .attr('class', 'nvd3 nv-noData')
            .attr('dy', '-.7em')
            .style('text-anchor', 'middle');
  
          noDataText
            .attr('x', margin.left + availableWidth / 2)
            .attr('y', margin.top + availableHeight / 2)
            .text(function(d) { return d });
  
          container.selectAll('.nv-multiBarWithLegend').style('visibility', 'hidden');
          container.selectAll('.nv-noData').style('visibility', 'visible');
  
          return chart;
        } else {
          container.selectAll('.nv-multiBarWithLegend').style('visibility', 'visible');
          container.selectAll('.nv-noData').style('visibility', 'hidden');
        }
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // Setup Scales
  
        x = multibar.xScale();
        y = multibar.yScale();
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // Setup containers and skeleton of chart
  
        var wrap = container.selectAll('g.nv-wrap.nv-multiBarWithLegend').data([data]);
        var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-multiBarWithLegend').append('g');
        var g = wrap.select('g');
  
        gEnter.append('g').attr('class', 'nv-x nv-axis');
        gEnter.append('g').attr('class', 'nv-y nv-axis');
        gEnter.append('g').attr('class', 'nv-barsWrap');
        gEnter.append('g').attr('class', 'nv-legendWrap');
        gEnter.append('g').attr('class', 'nv-controlsWrap');
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // Legend
  
        if (showLegend) {
          legend.width(availableWidth - controlWidth());
  
          if (multibar.barColor())
            data.forEach(function(series,i) {
              series.color = d3v3.rgb('#ccc').darker(i * 1.5).toString();
            })
  
          g.select('.nv-legendWrap')
              .datum(data)
              .call(legend);
  
          if (legend.height() > 50) {
            g.select('.nv-legendWrap').style('visibility', 'hidden');
          }
          else {
            g.select('.nv-legendWrap').style('visibility', 'visible');
            if (margin.top != legend.height()) {
              margin.top = legend.height();
              availableHeight = (height || parseInt(container.style('height')) || 400)
                - margin.top - margin.bottom;
            }
          }
  
          g.select('.nv-legendWrap')
              .attr('transform', 'translate(' + controlWidth() + ',' + (-margin.top) +')');
        }
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // Controls
  
        if (showControls) {
          var controlsData = [
            { key: 'Grouped', disabled: multibar.stacked() },
            { key: 'Stacked', disabled: !multibar.stacked() }
          ];
  
          controls.width(controlWidth()).color(['#444', '#444', '#444']);
          g.select('.nv-controlsWrap')
              .datum(controlsData)
              .attr('transform', 'translate(0,' + (-margin.top) +')')
              .call(controls);
        }
  
        //------------------------------------------------------------
  
  
        wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
  
        if (rightAlignYAxis) {
            g.select(".nv-y.nv-axis")
                .attr("transform", "translate(" + availableWidth + ",0)");
        }
  
        //------------------------------------------------------------
        // Main Chart Component(s)
  
        multibar
          .disabled(data.map(function(series) { return series.disabled }))
          .width(availableWidth)
          .height(availableHeight)
          .color(data.map(function(d,i) {
            return d.color || color(d, i);
          }).filter(function(d,i) { return !data[i].disabled }))
  
        selectBars = multibar.selectBars;
  
  
        var barsWrap = g.select('.nv-barsWrap')
            .datum(data.filter(function(d) { return !d.disabled }))
  
        barsWrap.transition().call(multibar);
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // Setup Axes
  
        if (showXAxis) {
            xAxis
              .scale(x)
              .ticks( availableWidth / 100 )
              .tickSize(-availableHeight, 0);
  
            g.select('.nv-x.nv-axis')
                .attr('transform', 'translate(0,' + y.range()[0] + ')');
            g.select('.nv-x.nv-axis').transition()
                .call(xAxis);
  
            var xTicks = g.select('.nv-x.nv-axis > g').selectAll('g');
  
            xTicks
                .selectAll('line, text')
                .style('opacity', 1)
  
            if (staggerLabels) {
                var getTranslate = function(x,y) {
                    return "translate(" + x + "," + y + ")";
                };
  
                var staggerUp = 5, staggerDown = 17;  //pixels to stagger by
                // Issue #140
                xTicks
                  .selectAll("text")
                  .attr('transform', function(d,i,j) {
                      return  getTranslate(0, (j % 2 == 0 ? staggerUp : staggerDown));
                    });
  
                var totalInBetweenTicks = d3v3.selectAll(".nv-x.nv-axis .nv-wrap g g text")[0].length;
                g.selectAll(".nv-x.nv-axis .nv-axisMaxMin text")
                  .attr("transform", function(d,i) {
                      return getTranslate(0, (i === 0 || totalInBetweenTicks % 2 !== 0) ? staggerDown : staggerUp);
                  });
            }
  
            if (reduceXTicks)
              xTicks
                .filter(function(d,i) {
                    return i % Math.ceil(data[0].values.length / (availableWidth / 100)) !== 0;
                  })
                .selectAll('text, line')
                .style('opacity', 0);
  
            if(rotateLabels)
              xTicks
                .selectAll('.tick text')
                .attr('transform', 'rotate(' + rotateLabels + ' 0,0)')
                .style('text-anchor', rotateLabels > 0 ? 'start' : 'end');
  
            g.select('.nv-x.nv-axis').selectAll('g.nv-axisMaxMin text')
                .style('opacity', 1);
        }
  
  
        if (showYAxis) {
            yAxis
              .scale(y)
              .ticks( availableHeight / 36 )
              .tickSize( -availableWidth, 0);
  
            g.select('.nv-y.nv-axis').transition()
                .call(yAxis);
        }
  
  
        //------------------------------------------------------------
  
  
  
        //============================================================
        // Event Handling/Dispatching (in chart's scope)
        //------------------------------------------------------------
  
        legend.dispatch.on('stateChange', function(newState) {
          state = newState;
          dispatch.stateChange(state);
          chart.update();
        });
  
        controls.dispatch.on('legendClick', function(d,i) {
          if (!d.disabled) return;
          controlsData = controlsData.map(function(s) {
            s.disabled = true;
            return s;
          });
          d.disabled = false;
  
          switch (d.key) {
            case 'Grouped':
              multibar.stacked(false);
              break;
            case 'Stacked':
              multibar.stacked(true);
              break;
          }
  
          state.stacked = multibar.stacked();
          dispatch.stateChange(state);
          if (onStateChange != null) {
            onStateChange(state);
          }
  
          chart.update();
        });
  
        dispatch.on('tooltipShow', function(e) {
          if (tooltips) showTooltip(e, that.parentNode)
        });
  
        // Update chart from a state object passed to event handler
        dispatch.on('changeState', function(e) {
  
          if (typeof e.disabled !== 'undefined') {
            data.forEach(function(series,i) {
              series.disabled = e.disabled[i];
            });
  
            state.disabled = e.disabled;
          }
  
          if (typeof e.stacked !== 'undefined') {
            multibar.stacked(e.stacked);
            state.stacked = e.stacked;
          }
  
          chart.update();
        });
  
        //============================================================
  
  
      });
  
      return chart;
    }
  
  
    //============================================================
    // Event Handling/Dispatching (out of chart's scope)
    //------------------------------------------------------------
  
    multibar.dispatch.on('elementMouseover.tooltip', function(e) {
      e.pos = [e.pos[0] +  margin.left, e.pos[1] + margin.top];
      dispatch.tooltipShow(e);
    });
  
    multibar.dispatch.on('elementMouseout.tooltip', function(e) {
      dispatch.tooltipHide(e);
    });
    dispatch.on('tooltipHide', function() {
      if (tooltips) nv.tooltip.cleanup();
    });
  
    //============================================================
  
  
    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------
  
    // expose chart's sub-components
    chart.dispatch = dispatch;
    chart.multibar = multibar;
    chart.legend = legend;
    chart.xAxis = xAxis;
    chart.yAxis = yAxis;
  
    d3v3.rebind(chart, multibar, 'x', 'y', 'xDomain', 'yDomain', 'xRange', 'yRange', 'forceX', 'forceY', 'clipEdge',
     'id', 'stacked', 'stackOffset', 'delay', 'barColor','groupSpacing');
  
    chart.options = nv.utils.optionsFunc.bind(chart);
  
    chart.margin = function(_) {
      if (!arguments.length) return margin;
      margin.top    = typeof _.top    != 'undefined' ? _.top    : margin.top;
      margin.right  = typeof _.right  != 'undefined' ? _.right  : margin.right;
      margin.bottom = typeof _.bottom != 'undefined' ? _.bottom : margin.bottom;
      margin.left   = typeof _.left   != 'undefined' ? _.left   : margin.left;
      return chart;
    };
  
    chart.width = function(_) {
      if (!arguments.length) return width;
      width = _;
      return chart;
    };
  
    chart.height = function(_) {
      if (!arguments.length) return height;
      height = _;
      return chart;
    };
  
    chart.color = function(_) {
      if (!arguments.length) return color;
      color = nv.utils.getColor(_);
      legend.color(color);
      return chart;
    };
  
    chart.showControls = function(_) {
      if (!arguments.length) return showControls;
      showControls = _;
      return chart;
    };
  
    chart.showLegend = function(_) {
      if (!arguments.length) return showLegend;
      showLegend = _;
      return chart;
    };
  
    chart.showXAxis = function(_) {
      if (!arguments.length) return showXAxis;
      showXAxis = _;
      return chart;
    };
  
    chart.showYAxis = function(_) {
      if (!arguments.length) return showYAxis;
      showYAxis = _;
      return chart;
    };
  
    chart.rightAlignYAxis = function(_) {
      if(!arguments.length) return rightAlignYAxis;
      rightAlignYAxis = _;
      yAxis.orient( (_) ? 'right' : 'left');
      return chart;
    };
  
    chart.reduceXTicks= function(_) {
      if (!arguments.length) return reduceXTicks;
      reduceXTicks = _;
      return chart;
    };
  
    chart.rotateLabels = function(_) {
      if (!arguments.length) return rotateLabels;
      rotateLabels = _;
      return chart;
    }
  
    chart.staggerLabels = function(_) {
      if (!arguments.length) return staggerLabels;
      staggerLabels = _;
      return chart;
    };
  
    chart.tooltip = function(_) {
      if (!arguments.length) return tooltip;
      tooltip = _;
      return chart;
    };
  
    chart.tooltips = function(_) {
      if (!arguments.length) return tooltips;
      tooltips = _;
      return chart;
    };
  
    chart.tooltipContent = function(_) {
      if (!arguments.length) return tooltip;
      tooltip = _;
      return chart;
    };
  
    chart.state = function(_) {
      if (!arguments.length) return state;
      state = _;
      return chart;
    };
  
    chart.defaultState = function(_) {
      if (!arguments.length) return defaultState;
      defaultState = _;
      return chart;
    };
  
    chart.noData = function(_) {
      if (!arguments.length) return noData;
      noData = _;
      return chart;
    };
  
    chart.transitionDuration = function(_) {
      if (!arguments.length) return transitionDuration;
      transitionDuration = _;
      return chart;
    };
  
    chart.selectBars = function(args) {
      if (!arguments.length) return selectBars;
      selectBars(args);
      return chart;
    };
  
    chart.onStateChange = function(_) {
      if (!arguments.length) return onStateChange;
      onStateChange = _;
      return chart;
    };
  
    //============================================================
  
  
    return chart;
  }
  