BubbleChartRenderer.java
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package com.github.mikephil.charting.renderer;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint.Style;
import android.graphics.drawable.Drawable;
import com.github.mikephil.charting.animation.ChartAnimator;
import com.github.mikephil.charting.data.BubbleData;
import com.github.mikephil.charting.data.BubbleEntry;
import com.github.mikephil.charting.highlight.Highlight;
import com.github.mikephil.charting.interfaces.dataprovider.BubbleDataProvider;
import com.github.mikephil.charting.interfaces.datasets.IBubbleDataSet;
import com.github.mikephil.charting.utils.MPPointF;
import com.github.mikephil.charting.utils.Transformer;
import com.github.mikephil.charting.utils.Utils;
import com.github.mikephil.charting.utils.ViewPortHandler;
import java.util.List;
/**
* Bubble chart implementation: Copyright 2015 Pierre-Marc Airoldi Licensed
* under Apache License 2.0 Ported by Daniel Cohen Gindi
*/
public class BubbleChartRenderer extends BarLineScatterCandleBubbleRenderer {
protected BubbleDataProvider mChart;
public BubbleChartRenderer(BubbleDataProvider chart, ChartAnimator animator,
ViewPortHandler viewPortHandler) {
super(animator, viewPortHandler);
mChart = chart;
mRenderPaint.setStyle(Style.FILL);
mHighlightPaint.setStyle(Style.STROKE);
mHighlightPaint.setStrokeWidth(Utils.convertDpToPixel(1.5f));
}
@Override
public void initBuffers() {
}
@Override
public void drawData(Canvas c) {
BubbleData bubbleData = mChart.getBubbleData();
for (IBubbleDataSet set : bubbleData.getDataSets()) {
if (set.isVisible())
drawDataSet(c, set);
}
}
private float[] sizeBuffer = new float[4];
private float[] pointBuffer = new float[2];
protected float getShapeSize(float entrySize, float maxSize, float reference, boolean normalizeSize) {
final float factor = normalizeSize ? ((maxSize == 0f) ? 1f : (float) Math.sqrt(entrySize / maxSize)) :
entrySize;
final float shapeSize = reference * factor;
return shapeSize;
}
protected void drawDataSet(Canvas c, IBubbleDataSet dataSet) {
Transformer trans = mChart.getTransformer(dataSet.getAxisDependency());
float phaseY = mAnimator.getPhaseY();
mXBounds.set(mChart, dataSet);
sizeBuffer[0] = 0f;
sizeBuffer[2] = 1f;
trans.pointValuesToPixel(sizeBuffer);
boolean normalizeSize = dataSet.isNormalizeSizeEnabled();
// calcualte the full width of 1 step on the x-axis
final float maxBubbleWidth = Math.abs(sizeBuffer[2] - sizeBuffer[0]);
final float maxBubbleHeight = Math.abs(mViewPortHandler.contentBottom() - mViewPortHandler.contentTop());
final float referenceSize = Math.min(maxBubbleHeight, maxBubbleWidth);
for (int j = mXBounds.min; j <= mXBounds.range + mXBounds.min; j++) {
final BubbleEntry entry = dataSet.getEntryForIndex(j);
pointBuffer[0] = entry.getX();
pointBuffer[1] = (entry.getY()) * phaseY;
trans.pointValuesToPixel(pointBuffer);
float shapeHalf = getShapeSize(entry.getSize(), dataSet.getMaxSize(), referenceSize, normalizeSize) / 2f;
if (!mViewPortHandler.isInBoundsTop(pointBuffer[1] + shapeHalf)
|| !mViewPortHandler.isInBoundsBottom(pointBuffer[1] - shapeHalf))
continue;
if (!mViewPortHandler.isInBoundsLeft(pointBuffer[0] + shapeHalf))
continue;
if (!mViewPortHandler.isInBoundsRight(pointBuffer[0] - shapeHalf))
break;
final int color = dataSet.getColor((int) entry.getX());
mRenderPaint.setColor(color);
c.drawCircle(pointBuffer[0], pointBuffer[1], shapeHalf, mRenderPaint);
}
}
@Override
public void drawValues(Canvas c) {
BubbleData bubbleData = mChart.getBubbleData();
if (bubbleData == null)
return;
// if values are drawn
if (isDrawingValuesAllowed(mChart)) {
final List<IBubbleDataSet> dataSets = bubbleData.getDataSets();
float lineHeight = Utils.calcTextHeight(mValuePaint, "1");
for (int i = 0; i < dataSets.size(); i++) {
IBubbleDataSet dataSet = dataSets.get(i);
if (!shouldDrawValues(dataSet))
continue;
// apply the text-styling defined by the DataSet
applyValueTextStyle(dataSet);
final float phaseX = Math.max(0.f, Math.min(1.f, mAnimator.getPhaseX()));
final float phaseY = mAnimator.getPhaseY();
mXBounds.set(mChart, dataSet);
final float[] positions = mChart.getTransformer(dataSet.getAxisDependency())
.generateTransformedValuesBubble(dataSet, phaseY, mXBounds.min, mXBounds.max);
final float alpha = phaseX == 1 ? phaseY : phaseX;
MPPointF iconsOffset = MPPointF.getInstance(dataSet.getIconsOffset());
iconsOffset.x = Utils.convertDpToPixel(iconsOffset.x);
iconsOffset.y = Utils.convertDpToPixel(iconsOffset.y);
for (int j = 0; j < positions.length; j += 2) {
int valueTextColor = dataSet.getValueTextColor(j / 2 + mXBounds.min);
valueTextColor = Color.argb(Math.round(255.f * alpha), Color.red(valueTextColor),
Color.green(valueTextColor), Color.blue(valueTextColor));
float x = positions[j];
float y = positions[j + 1];
if (!mViewPortHandler.isInBoundsRight(x))
break;
if ((!mViewPortHandler.isInBoundsLeft(x) || !mViewPortHandler.isInBoundsY(y)))
continue;
BubbleEntry entry = dataSet.getEntryForIndex(j / 2 + mXBounds.min);
if (dataSet.isDrawValuesEnabled()) {
drawValue(c, dataSet.getValueFormatter(), entry.getSize(), entry, i, x,
y + (0.5f * lineHeight), valueTextColor);
}
if (entry.getIcon() != null && dataSet.isDrawIconsEnabled()) {
Drawable icon = entry.getIcon();
Utils.drawImage(
c,
icon,
(int)(x + iconsOffset.x),
(int)(y + iconsOffset.y),
icon.getIntrinsicWidth(),
icon.getIntrinsicHeight());
}
}
MPPointF.recycleInstance(iconsOffset);
}
}
}
@Override
public void drawExtras(Canvas c) {
}
private float[] _hsvBuffer = new float[3];
@Override
public void drawHighlighted(Canvas c, Highlight[] indices) {
BubbleData bubbleData = mChart.getBubbleData();
float phaseY = mAnimator.getPhaseY();
for (Highlight high : indices) {
IBubbleDataSet set = bubbleData.getDataSetByIndex(high.getDataSetIndex());
if (set == null || !set.isHighlightEnabled())
continue;
final BubbleEntry entry = set.getEntryForXValue(high.getX(), high.getY());
if (entry.getY() != high.getY())
continue;
if (!isInBoundsX(entry, set))
continue;
Transformer trans = mChart.getTransformer(set.getAxisDependency());
sizeBuffer[0] = 0f;
sizeBuffer[2] = 1f;
trans.pointValuesToPixel(sizeBuffer);
boolean normalizeSize = set.isNormalizeSizeEnabled();
// calcualte the full width of 1 step on the x-axis
final float maxBubbleWidth = Math.abs(sizeBuffer[2] - sizeBuffer[0]);
final float maxBubbleHeight = Math.abs(
mViewPortHandler.contentBottom() - mViewPortHandler.contentTop());
final float referenceSize = Math.min(maxBubbleHeight, maxBubbleWidth);
pointBuffer[0] = entry.getX();
pointBuffer[1] = (entry.getY()) * phaseY;
trans.pointValuesToPixel(pointBuffer);
high.setDraw(pointBuffer[0], pointBuffer[1]);
float shapeHalf = getShapeSize(entry.getSize(),
set.getMaxSize(),
referenceSize,
normalizeSize) / 2f;
if (!mViewPortHandler.isInBoundsTop(pointBuffer[1] + shapeHalf)
|| !mViewPortHandler.isInBoundsBottom(pointBuffer[1] - shapeHalf))
continue;
if (!mViewPortHandler.isInBoundsLeft(pointBuffer[0] + shapeHalf))
continue;
if (!mViewPortHandler.isInBoundsRight(pointBuffer[0] - shapeHalf))
break;
final int originalColor = set.getColor((int) entry.getX());
Color.RGBToHSV(Color.red(originalColor), Color.green(originalColor),
Color.blue(originalColor), _hsvBuffer);
_hsvBuffer[2] *= 0.5f;
final int color = Color.HSVToColor(Color.alpha(originalColor), _hsvBuffer);
mHighlightPaint.setColor(color);
mHighlightPaint.setStrokeWidth(set.getHighlightCircleWidth());
c.drawCircle(pointBuffer[0], pointBuffer[1], shapeHalf, mHighlightPaint);
}
}
}