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danielgindidanielgindi
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Support for lines drawn to pie values
1 parent aa6bb74 commit 56e59d8

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‎MPChartExample/AndroidManifest.xml‎

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<activity android:name="BarChartActivity"></activity>
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<activity android:name="HorizontalBarChartActivity"></activity>
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<activity android:name="PieChartActivity"></activity>
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<activity android:name="PiePolylineChartActivity"></activity>
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<activity android:name="MultiLineChartActivity"></activity>
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<activity android:name="BarChartActivityMultiDataset"></activity>
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<activity android:name="DrawChartActivity"></activity>

‎MPChartExample/src/com/xxmassdeveloper/mpchartexample/PiePolylineChartActivity.java‎

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package com.xxmassdeveloper.mpchartexample;
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import android.graphics.Color;
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import android.graphics.Typeface;
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import android.os.Bundle;
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import android.text.SpannableString;
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import android.text.style.ForegroundColorSpan;
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import android.text.style.RelativeSizeSpan;
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import android.text.style.StyleSpan;
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import android.util.Log;
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import android.view.Menu;
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import android.view.MenuItem;
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import android.view.WindowManager;
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import android.widget.SeekBar;
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import android.widget.SeekBar.OnSeekBarChangeListener;
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import android.widget.TextView;
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import com.github.mikephil.charting.animation.Easing;
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import com.github.mikephil.charting.charts.PieChart;
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import com.github.mikephil.charting.components.Legend;
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import com.github.mikephil.charting.components.Legend.LegendPosition;
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import com.github.mikephil.charting.data.Entry;
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import com.github.mikephil.charting.data.PieData;
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import com.github.mikephil.charting.data.PieDataSet;
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import com.github.mikephil.charting.formatter.PercentFormatter;
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import com.github.mikephil.charting.highlight.Highlight;
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import com.github.mikephil.charting.interfaces.datasets.IDataSet;
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import com.github.mikephil.charting.listener.OnChartValueSelectedListener;
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import com.github.mikephil.charting.utils.ColorTemplate;
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import com.xxmassdeveloper.mpchartexample.notimportant.DemoBase;
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import java.util.ArrayList;
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public class PiePolylineChartActivity extends DemoBase implements OnSeekBarChangeListener,
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OnChartValueSelectedListener {
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private PieChart mChart;
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private SeekBar mSeekBarX, mSeekBarY;
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private TextView tvX, tvY;
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private Typeface tf;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
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WindowManager.LayoutParams.FLAG_FULLSCREEN);
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setContentView(R.layout.activity_piechart);
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tvX = (TextView) findViewById(R.id.tvXMax);
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tvY = (TextView) findViewById(R.id.tvYMax);
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mSeekBarX = (SeekBar) findViewById(R.id.seekBar1);
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mSeekBarY = (SeekBar) findViewById(R.id.seekBar2);
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mSeekBarY.setProgress(10);
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mSeekBarX.setOnSeekBarChangeListener(this);
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mSeekBarY.setOnSeekBarChangeListener(this);
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mChart = (PieChart) findViewById(R.id.chart1);
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mChart.setUsePercentValues(true);
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mChart.setDescription("");
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mChart.setExtraOffsets(5, 10, 5, 5);
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mChart.setDragDecelerationFrictionCoef(0.95f);
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tf = Typeface.createFromAsset(getAssets(), "OpenSans-Regular.ttf");
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mChart.setCenterTextTypeface(Typeface.createFromAsset(getAssets(), "OpenSans-Light.ttf"));
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mChart.setCenterText(generateCenterSpannableText());
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mChart.setExtraOffsets(0.f, 50.f, 0.f, 50.f);
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mChart.setDrawHoleEnabled(true);
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mChart.setHoleColor(Color.WHITE);
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mChart.setTransparentCircleColor(Color.WHITE);
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mChart.setTransparentCircleAlpha(110);
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mChart.setHoleRadius(58f);
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mChart.setTransparentCircleRadius(61f);
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mChart.setDrawCenterText(true);
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mChart.setRotationAngle(0);
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// enable rotation of the chart by touch
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mChart.setRotationEnabled(true);
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mChart.setHighlightPerTapEnabled(true);
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// mChart.setUnit(" €");
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// mChart.setDrawUnitsInChart(true);
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// add a selection listener
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mChart.setOnChartValueSelectedListener(this);
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setData(3, 100);
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mChart.animateY(1400, Easing.EasingOption.EaseInOutQuad);
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// mChart.spin(2000, 0, 360);
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Legend l = mChart.getLegend();
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l.setPosition(LegendPosition.RIGHT_OF_CHART);
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l.setEnabled(false);
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}
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@Override
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public boolean onCreateOptionsMenu(Menu menu) {
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getMenuInflater().inflate(R.menu.pie, menu);
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return true;
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}
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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switch (item.getItemId()) {
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case R.id.actionToggleValues: {
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for (IDataSet<?> set : mChart.getData().getDataSets())
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set.setDrawValues(!set.isDrawValuesEnabled());
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mChart.invalidate();
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break;
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}
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case R.id.actionToggleHole: {
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if (mChart.isDrawHoleEnabled())
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mChart.setDrawHoleEnabled(false);
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else
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mChart.setDrawHoleEnabled(true);
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mChart.invalidate();
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break;
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}
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case R.id.actionDrawCenter: {
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if (mChart.isDrawCenterTextEnabled())
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mChart.setDrawCenterText(false);
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else
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mChart.setDrawCenterText(true);
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mChart.invalidate();
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break;
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}
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case R.id.actionToggleXVals: {
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mChart.setDrawSliceText(!mChart.isDrawSliceTextEnabled());
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mChart.invalidate();
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break;
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}
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case R.id.actionSave: {
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// mChart.saveToGallery("title"+System.currentTimeMillis());
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mChart.saveToPath("title" + System.currentTimeMillis(), "");
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break;
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}
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case R.id.actionTogglePercent:
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mChart.setUsePercentValues(!mChart.isUsePercentValuesEnabled());
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mChart.invalidate();
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break;
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case R.id.animateX: {
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mChart.animateX(1400);
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break;
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}
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case R.id.animateY: {
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mChart.animateY(1400);
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break;
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}
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case R.id.animateXY: {
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mChart.animateXY(1400, 1400);
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break;
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}
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}
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return true;
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}
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@Override
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public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
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tvX.setText("" + (mSeekBarX.getProgress() + 1));
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tvY.setText("" + (mSeekBarY.getProgress()));
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setData(mSeekBarX.getProgress(), mSeekBarY.getProgress());
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}
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private void setData(int count, float range) {
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float mult = range;
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ArrayList<Entry> yVals1 = new ArrayList<Entry>();
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// IMPORTANT: In a PieChart, no values (Entry) should have the same
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// xIndex (even if from different DataSets), since no values can be
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// drawn above each other.
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for (int i = 0; i < count + 1; i++) {
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yVals1.add(new Entry((float) (Math.random() * mult) + mult / 5, i));
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}
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ArrayList<String> xVals = new ArrayList<String>();
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for (int i = 0; i < count + 1; i++)
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xVals.add(mParties[i % mParties.length]);
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PieDataSet dataSet = new PieDataSet(yVals1, "Election Results");
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dataSet.setSliceSpace(3f);
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dataSet.setSelectionShift(5f);
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// add a lot of colors
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ArrayList<Integer> colors = new ArrayList<Integer>();
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for (int c : ColorTemplate.VORDIPLOM_COLORS)
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colors.add(c);
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for (int c : ColorTemplate.JOYFUL_COLORS)
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colors.add(c);
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for (int c : ColorTemplate.COLORFUL_COLORS)
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colors.add(c);
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for (int c : ColorTemplate.LIBERTY_COLORS)
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colors.add(c);
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for (int c : ColorTemplate.PASTEL_COLORS)
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colors.add(c);
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colors.add(ColorTemplate.getHoloBlue());
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dataSet.setColors(colors);
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//dataSet.setSelectionShift(0f);
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dataSet.setValueLinePart1OffsetPercentage(80.f);
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dataSet.setValueLinePart1Length(0.4f);
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dataSet.setValueLinePart2Length(0.5f);
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// dataSet.setXValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE);
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dataSet.setYValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE);
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PieData data = new PieData(xVals, dataSet);
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data.setValueFormatter(new PercentFormatter());
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data.setValueTextSize(11f);
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data.setValueTextColor(Color.BLACK);
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data.setValueTypeface(tf);
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mChart.setData(data);
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// undo all highlights
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mChart.highlightValues(null);
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mChart.invalidate();
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}
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private SpannableString generateCenterSpannableText() {
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SpannableString s = new SpannableString("MPAndroidChart\ndeveloped by Philipp Jahoda");
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s.setSpan(new RelativeSizeSpan(1.7f), 0, 14, 0);
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s.setSpan(new StyleSpan(Typeface.NORMAL), 14, s.length() - 15, 0);
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s.setSpan(new ForegroundColorSpan(Color.GRAY), 14, s.length() - 15, 0);
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s.setSpan(new RelativeSizeSpan(.8f), 14, s.length() - 15, 0);
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s.setSpan(new StyleSpan(Typeface.ITALIC), s.length() - 14, s.length(), 0);
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s.setSpan(new ForegroundColorSpan(ColorTemplate.getHoloBlue()), s.length() - 14, s.length(), 0);
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return s;
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}
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@Override
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public void onValueSelected(Entry e, int dataSetIndex, Highlight h) {
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if (e == null)
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return;
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Log.i("VAL SELECTED",
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"Value: " + e.getVal() + ", xIndex: " + e.getXIndex()
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+ ", DataSet index: " + dataSetIndex);
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}
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@Override
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public void onNothingSelected() {
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Log.i("PieChart", "nothing selected");
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}
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@Override
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public void onStartTrackingTouch(SeekBar seekBar) {
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// TODO Auto-generated method stub
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}
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@Override
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public void onStopTrackingTouch(SeekBar seekBar) {
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// TODO Auto-generated method stub
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}
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}

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