BarDataSet.java

package com.github.mikephil.charting.data;

import android.graphics.Color;

import java.util.ArrayList;
import java.util.List;

public class BarDataSet extends BarLineScatterCandleDataSet<BarEntry> {

    /** space indicator between the bars 0.1f == 10 % */
    private float mBarSpace = 0.15f;

    /**
     * the maximum number of bars that are stacked upon each other, this value
     * is calculated from the Entries that are added to the DataSet
     */
    private int mStackSize = 1;

    /** the color used for drawing the bar shadows */
    private int mBarShadowColor = Color.rgb(215, 215, 215);

    /** the alpha value used to draw the highlight indicator bar */
    private int mHighLightAlpha = 120;

    /**
     * the overall entry count, including counting each stack-value individually
     */
    private int mEntryCountStacks = 0;

    /**
     * array of labels used to describe the different values of the stacked bars
     */
    private String[] mStackLabels = new String[] {
            "Stack"
    };

    public BarDataSet(List<BarEntry> yVals, String label) {
        super(yVals, label);

        mHighLightColor = Color.rgb(0, 0, 0);

        calcStackSize(yVals);
        calcEntryCountIncludingStacks(yVals);
    }

    @Override
    public DataSet<BarEntry> copy() {

        List<BarEntry> yVals = new ArrayList<BarEntry>();

        for (int i = 0; i < mYVals.size(); i++) {
            yVals.add(((BarEntry) mYVals.get(i)).copy());
        }

        BarDataSet copied = new BarDataSet(yVals, getLabel());
        copied.mColors = mColors;
        copied.mStackSize = mStackSize;
        copied.mBarSpace = mBarSpace;
        copied.mBarShadowColor = mBarShadowColor;
        copied.mStackLabels = mStackLabels;
        copied.mHighLightColor = mHighLightColor;
        copied.mHighLightAlpha = mHighLightAlpha;

        return copied;
    }

    /**
     * Calculates the total number of entries this DataSet represents, including
     * stacks. All values belonging to a stack are calculated separately.
     */
    private void calcEntryCountIncludingStacks(List<BarEntry> yVals) {

        mEntryCountStacks = 0;

        for (int i = 0; i < yVals.size(); i++) {

            float[] vals = yVals.get(i).getVals();

            if (vals == null)
                mEntryCountStacks++;
            else
                mEntryCountStacks += vals.length;
        }
    }

    /**
     * calculates the maximum stacksize that occurs in the Entries array of this
     * DataSet
     */
    private void calcStackSize(List<BarEntry> yVals) {

        for (int i = 0; i < yVals.size(); i++) {

            float[] vals = yVals.get(i).getVals();

            if (vals != null && vals.length > mStackSize)
                mStackSize = vals.length;
        }
    }

    /**
     * Returns the maximum number of bars that can be stacked upon another in
     * this DataSet.
     * 
     * @return
     */
    public int getStackSize() {
        return mStackSize;
    }

    /**
     * Returns true if this DataSet is stacked (stacksize > 1) or not.
     * 
     * @return
     */
    public boolean isStacked() {
        return mStackSize > 1 ? true : false;
    }

    /**
     * returns the overall entry count, including counting each stack-value
     * individually
     * 
     * @return
     */
    public int getEntryCountStacks() {
        return mEntryCountStacks;
    }

    /**
     * returns the space between bars in percent of the whole width of one value
     * 
     * @return
     */
    public float getBarSpacePercent() {
        return mBarSpace * 100f;
    }

    /**
     * returns the space between bars as the actual value (0 - 1.0f)
     * 
     * @return
     */
    public float getBarSpace() {
        return mBarSpace;
    }

    /**
     * sets the space between the bars in percent of the total bar width
     * 
     * @param percent
     */
    public void setBarSpacePercent(float percent) {
        mBarSpace = percent / 100f;
    }

    /**
     * Sets the color used for drawing the bar-shadows. The bar shadows is a
     * surface behind the bar that indicates the maximum value. Don't for get to
     * use getResources().getColor(...) to set this. Or Color.rgb(...).
     * 
     * @param color
     */
    public void setBarShadowColor(int color) {
        mBarShadowColor = color;
    }

    /**
     * Returns the color used for drawing the bar-shadows. The bar shadows is a
     * surface behind the bar that indicates the maximum value.
     * 
     * @return
     */
    public int getBarShadowColor() {
        return mBarShadowColor;
    }

    /**
     * Set the alpha value (transparency) that is used for drawing the highlight
     * indicator bar. min = 0 (fully transparent), max = 255 (fully opaque)
     * 
     * @param alpha
     */
    public void setHighLightAlpha(int alpha) {
        mHighLightAlpha = alpha;
    }

    /**
     * Returns the alpha value (transparency) that is used for drawing the
     * highlight indicator.
     * 
     * @return
     */
    public int getHighLightAlpha() {
        return mHighLightAlpha;
    }

    /**
     * Sets labels for different values of bar-stacks, in case there are one.
     * 
     * @param labels
     */
    public void setStackLabels(String[] labels) {
        mStackLabels = labels;
    }

    /**
     * returns the labels used for the different value-stacks
     * 
     * @return
     */
    public String[] getStackLabels() {
        return mStackLabels;
    }
}