Merge commit '42b2e5ca519766e37ce6941ba4faecc9691cc403' into upstream

[debian/openrocket] / android-libraries / achartengine / src / org / achartengine / chart / PieChart.java

diff --git a/android-libraries/achartengine/src/org/achartengine/chart/PieChart.java b/android-libraries/achartengine/src/org/achartengine/chart/PieChart.java
new file mode 100644 (file)
index 0000000..d656a95
--- /dev/null
+++ b/android-libraries/achartengine/src/org/achartengine/chart/PieChart.java
@@ -0,0 +1,136 @@
+/**
+ * Copyright (C) 2009 - 2012 SC 4ViewSoft SRL
+ *  
+ * Licensed 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.
+ */
+package org.achartengine.chart;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.achartengine.model.CategorySeries;
+import org.achartengine.model.Point;
+import org.achartengine.model.SeriesSelection;
+import org.achartengine.renderer.DefaultRenderer;
+
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Paint.Style;
+import android.graphics.RectF;
+
+/**
+ * The pie chart rendering class.
+ */
+public class PieChart extends RoundChart {
+  /** Handles returning values when tapping on PieChart. */
+  private PieMapper mPieMapper;
+
+  /**
+   * Builds a new pie chart instance.
+   * 
+   * @param dataset the series dataset
+   * @param renderer the series renderer
+   */
+  public PieChart(CategorySeries dataset, DefaultRenderer renderer) {
+    super(dataset, renderer);
+    mPieMapper = new PieMapper();
+  }
+
+  /**
+   * The graphical representation of the pie chart.
+   * 
+   * @param canvas the canvas to paint to
+   * @param x the top left x value of the view to draw to
+   * @param y the top left y value of the view to draw to
+   * @param width the width of the view to draw to
+   * @param height the height of the view to draw to
+   * @param paint the paint
+   */
+  @Override
+  public void draw(Canvas canvas, int x, int y, int width, int height, Paint paint) {
+    paint.setAntiAlias(mRenderer.isAntialiasing());
+    paint.setStyle(Style.FILL);
+    paint.setTextSize(mRenderer.getLabelsTextSize());
+    int legendSize = getLegendSize(mRenderer, height / 5, 0);
+    int left = x;
+    int top = y;
+    int right = x + width;
+    int sLength = mDataset.getItemCount();
+    double total = 0;
+    String[] titles = new String[sLength];
+    for (int i = 0; i < sLength; i++) {
+      total += mDataset.getValue(i);
+      titles[i] = mDataset.getCategory(i);
+    }
+    if (mRenderer.isFitLegend()) {
+      legendSize = drawLegend(canvas, mRenderer, titles, left, right, y, width, height, legendSize,
+          paint, true);
+    }
+    int bottom = y + height - legendSize;
+    drawBackground(mRenderer, canvas, x, y, width, height, paint, false, DefaultRenderer.NO_COLOR);
+
+    float currentAngle = mRenderer.getStartAngle();
+    int mRadius = Math.min(Math.abs(right - left), Math.abs(bottom - top));
+    int radius = (int) (mRadius * 0.35 * mRenderer.getScale());
+
+    if (mCenterX == NO_VALUE) {
+      mCenterX = (left + right) / 2;
+    }
+    if (mCenterY == NO_VALUE) {
+      mCenterY = (bottom + top) / 2;
+    }
+
+    // Hook in clip detection after center has been calculated
+    mPieMapper.setDimensions(radius, mCenterX, mCenterY);
+    boolean loadPieCfg = !mPieMapper.areAllSegmentPresent(sLength);
+    if (loadPieCfg) {
+      mPieMapper.clearPieSegments();
+    }
+
+    float shortRadius = radius * 0.9f;
+    float longRadius = radius * 1.1f;
+
+    RectF oval = new RectF(mCenterX - radius, mCenterY - radius, mCenterX + radius, mCenterY
+        + radius);
+    List<RectF> prevLabelsBounds = new ArrayList<RectF>();
+
+    for (int i = 0; i < sLength; i++) {
+      paint.setColor(mRenderer.getSeriesRendererAt(i).getColor());
+      float value = (float) mDataset.getValue(i);
+      float angle = (float) (value / total * 360);
+      canvas.drawArc(oval, currentAngle, angle, true, paint);
+      drawLabel(canvas, mDataset.getCategory(i), mRenderer, prevLabelsBounds, mCenterX, mCenterY,
+          shortRadius, longRadius, currentAngle, angle, left, right, mRenderer.getLabelsColor(),
+          paint, true);
+      if (mRenderer.isDisplayValues()) {
+        drawLabel(canvas, getLabel(mDataset.getValue(i)), mRenderer, prevLabelsBounds, mCenterX,
+            mCenterY, shortRadius / 2, longRadius / 2, currentAngle, angle, left, right,
+            mRenderer.getLabelsColor(), paint, false);
+      }
+
+      // Save details for getSeries functionality
+      if (loadPieCfg) {
+        mPieMapper.addPieSegment(i, value, currentAngle, angle);
+      }
+      currentAngle += angle;
+    }
+    prevLabelsBounds.clear();
+    drawLegend(canvas, mRenderer, titles, left, right, y, width, height, legendSize, paint, false);
+    drawTitle(canvas, x, y, width, paint);
+  }
+
+  public SeriesSelection getSeriesAndPointForScreenCoordinate(Point screenPoint) {
+    return mPieMapper.getSeriesAndPointForScreenCoordinate(screenPoint);
+  }
+
+}