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PhilJayPhilJay
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Add example for half-piechart
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6 files changed

+183
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‎MPChartExample/AndroidManifest.xml‎

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<activity android:name=".realm.RealmWikiExample"></activity>
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<activity android:name=".BarChartPositiveNegative"></activity>
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<activity android:name=".FilledLineActivity"></activity>
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<activity android:name=".HalfPieChartActivity"></activity>
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</application>
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</manifest>

‎MPChartExample/res/layout/activity_piechart_half.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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android:layout_width="match_parent"
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android:layout_height="match_parent" >
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<com.github.mikephil.charting.charts.PieChart
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android:id="@+id/chart1"
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android:layout_width="match_parent"
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android:layout_height="match_parent" />
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</RelativeLayout>

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

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package com.xxmassdeveloper.mpchartexample;
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import android.graphics.Color;
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import android.graphics.Point;
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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.view.Display;
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import android.view.WindowManager;
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import android.widget.RelativeLayout;
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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.PieData;
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import com.github.mikephil.charting.data.PieDataSet;
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import com.github.mikephil.charting.data.PieEntry;
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import com.github.mikephil.charting.formatter.PercentFormatter;
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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 HalfPieChartActivity extends DemoBase {
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private PieChart mChart;
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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_half);
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mChart = (PieChart) findViewById(R.id.chart1);
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mChart.setBackgroundColor(Color.WHITE);
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moveOffScreen();
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mChart.setUsePercentValues(true);
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mChart.setDescription("");
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mChart.setCenterTextTypeface(mTfLight);
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mChart.setCenterText(generateCenterSpannableText());
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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.setRotationEnabled(false);
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mChart.setHighlightPerTapEnabled(true);
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mChart.setMaxAngle(180f); // HALF CHART
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mChart.setRotationAngle(180f);
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mChart.setCenterTextOffset(0, -20);
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setData(4, 100);
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mChart.animateY(1400, Easing.EasingOption.EaseInOutQuad);
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Legend l = mChart.getLegend();
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l.setPosition(LegendPosition.ABOVE_CHART_CENTER);
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l.setXEntrySpace(7f);
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l.setYEntrySpace(0f);
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l.setYOffset(0f);
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// entry label styling
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mChart.setEntryLabelColor(Color.WHITE);
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mChart.setEntryLabelTypeface(mTfRegular);
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mChart.setEntryLabelTextSize(12f);
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}
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private void setData(int count, float range) {
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ArrayList<PieEntry> values = new ArrayList<PieEntry>();
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for (int i = 0; i < count; i++) {
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values.add(new PieEntry((float) ((Math.random() * range) + range / 5), mParties[i % mParties.length]));
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}
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PieDataSet dataSet = new PieDataSet(values, "Election Results");
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dataSet.setSliceSpace(3f);
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dataSet.setSelectionShift(5f);
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dataSet.setColors(ColorTemplate.MATERIAL_COLORS);
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//dataSet.setSelectionShift(0f);
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PieData data = new PieData(dataSet);
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data.setValueFormatter(new PercentFormatter());
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data.setValueTextSize(11f);
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data.setValueTextColor(Color.WHITE);
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data.setValueTypeface(mTfLight);
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mChart.setData(data);
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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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private void moveOffScreen() {
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Display display = getWindowManager().getDefaultDisplay();
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int height = display.getHeight(); // deprecated
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int offset = (int)(height * 0.65); /* or whatever */
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RelativeLayout.LayoutParams rlParams =
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(RelativeLayout.LayoutParams)mChart.getLayoutParams();
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rlParams.setMargins(0, 0, 0, -offset);
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mChart.setLayoutParams(rlParams);
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}
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}

‎MPChartExample/src/com/xxmassdeveloper/mpchartexample/notimportant/MainActivity.java‎

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import com.xxmassdeveloper.mpchartexample.CubicLineChartActivity;
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import com.xxmassdeveloper.mpchartexample.DynamicalAddingActivity;
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import com.xxmassdeveloper.mpchartexample.FilledLineActivity;
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import com.xxmassdeveloper.mpchartexample.HalfPieChartActivity;
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import com.xxmassdeveloper.mpchartexample.HorizontalBarChartActivity;
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import com.xxmassdeveloper.mpchartexample.InvertedLineChartActivity;
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import com.xxmassdeveloper.mpchartexample.LineChartActivity1;
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objects.add(new ContentItem(
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"Filled LineChart",
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"This demonstrates how to fill an area between two LineDataSets."));
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objects.add(new ContentItem(
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"Half PieChart",
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"This demonstrates how to create a 180 degree PieChart."));
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MyAdapter adapter = new MyAdapter(this, objects);
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i = new Intent(this, FilledLineActivity.class);
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startActivity(i);
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break;
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case 31:
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i = new Intent(this, HalfPieChartActivity.class);
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startActivity(i);
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break;
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}
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‎MPChartLib/src/main/java/com/github/mikephil/charting/charts/PieChart.java‎

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*/
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private CharSequence mCenterText = "";
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private PointF mCenterTextOffset = new PointF(0, 0);
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/**
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* indicates the size of the hole in the center of the piechart, default:
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* radius / 2
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((PieChartRenderer) mRenderer).getPaintCenterText().setTextSize(sizePixels);
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}
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/**
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* Sets the offset the center text should have from it's original position in dp. Default x = 0, y = 0
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*
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* @param x
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* @param y
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*/
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public void setCenterTextOffset(float x, float y) {
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mCenterTextOffset = new PointF(Utils.convertDpToPixel(x), Utils.convertDpToPixel(y));
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}
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/**
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* Returns the offset on the x- and y-axis the center text has in dp.
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*
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* @return
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*/
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public PointF getCenterTextOffset() {
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return mCenterTextOffset;
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}
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/**
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* Sets the color of the center text of the PieChart.
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*

‎MPChartLib/src/main/java/com/github/mikephil/charting/renderer/PieChartRenderer.java‎

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if (mChart.isDrawCenterTextEnabled() && centerText != null) {
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PointF center = mChart.getCenterCircleBox();
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PointF offset = mChart.getCenterTextOffset();
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float x = center.x + offset.x;
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float y = center.y + offset.y;
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float innerRadius = mChart.isDrawHoleEnabled() && !mChart.isDrawSlicesUnderHoleEnabled()
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? mChart.getRadius() * (mChart.getHoleRadius() / 100f)
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: mChart.getRadius();
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RectF holeRect = mRectBuffer[0];
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holeRect.left = center.x - innerRadius;
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holeRect.top = center.y - innerRadius;
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holeRect.right = center.x + innerRadius;
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holeRect.bottom = center.y + innerRadius;
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holeRect.left = x - innerRadius;
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holeRect.top = y - innerRadius;
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holeRect.right = x + innerRadius;
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holeRect.bottom = y + innerRadius;
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RectF boundingRect = mRectBuffer[1];
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boundingRect.set(holeRect);
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