Android Open Source - sensorreadout Pie Mapper






From Project

Back to project page sensorreadout.

License

The source code is released under:

Apache License

If you think the Android project sensorreadout listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

/**
 * Copyright (C) 2009 - 2013 SC 4ViewSoft SRL
 *  // w  w  w  . j a  v a  2 s. c o m
 * 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.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import org.achartengine.model.Point;
import org.achartengine.model.SeriesSelection;

/**
 * PieChart Segment Selection Management.
 */
public class PieMapper implements Serializable {

  private List<PieSegment> mPieSegmentList = new ArrayList<PieSegment>();

  private int mPieChartRadius;

  private int mCenterX, mCenterY;

  /**
   * Set PieChart location on screen.
   * 
   * @param pieRadius
   * @param centerX
   * @param centerY
   */
  public void setDimensions(int pieRadius, int centerX, int centerY) {
    mPieChartRadius = pieRadius;
    mCenterX = centerX;
    mCenterY = centerY;
  }

  /**
   * If we have all PieChart Config then there is no point in reloading it
   * 
   * @param datasetSize
   * @return true if cfg for each segment is present
   */
  public boolean areAllSegmentPresent(int datasetSize) {
    return mPieSegmentList.size() == datasetSize;
  }
  
  /**
   * Add configuration for a PieChart Segment
   * 
   * @param dataIndex
   * @param value
   * @param startAngle
   * @param angle
   */
  public void addPieSegment(int dataIndex, float value, float startAngle, float angle) {
    mPieSegmentList.add(new PieSegment(dataIndex, value, startAngle, angle));
  }
  
  /**
   * Clears the pie segments list.
   */
  public void clearPieSegments() {
    mPieSegmentList.clear();
  }

  /**
   * Fetches angle relative to pie chart center point where 3 O'Clock is 0 and
   * 12 O'Clock is 270degrees
   * 
   * @param screenPoint
   * @return angle in degress from 0-360.
   */
  public double getAngle(Point screenPoint) {
    double dx = screenPoint.getX() - mCenterX;
    // Minus to correct for coord re-mapping
    double dy = -(screenPoint.getY() - mCenterY);

    double inRads = Math.atan2(dy, dx);

    // We need to map to coord system when 0 degree is at 3 O'clock, 270 at 12
    // O'clock
    if (inRads < 0)
      inRads = Math.abs(inRads);
    else
      inRads = 2 * Math.PI - inRads;

    return Math.toDegrees(inRads);
  }

  /**
   * Checks if Point falls within PieChart
   * 
   * @param screenPoint
   * @return true if in PieChart
   */
  public boolean isOnPieChart(Point screenPoint) {
    // Using a bit of Pythagoras
    // inside circle if (x-center_x)**2 + (y-center_y)**2 <= radius**2:

    double sqValue = (Math.pow(mCenterX - screenPoint.getX(), 2) + Math.pow(
        mCenterY - screenPoint.getY(), 2));

    double radiusSquared = mPieChartRadius * mPieChartRadius;
    boolean isOnPieChart = sqValue <= radiusSquared;
    return isOnPieChart;
  }

  /**
   * Fetches the SeriesSelection for the PieSegment selected.
   * 
   * @param screenPoint - the user tap location
   * @return null if screen point is not in PieChart or its config if it is
   */
  public SeriesSelection getSeriesAndPointForScreenCoordinate(Point screenPoint) {
    if (isOnPieChart(screenPoint)) {
      double angleFromPieCenter = getAngle(screenPoint);

      for (PieSegment pieSeg : mPieSegmentList) {
        if (pieSeg.isInSegment(angleFromPieCenter)) {
          return new SeriesSelection(0, pieSeg.getDataIndex(), pieSeg.getValue(),
              pieSeg.getValue());
        }
      }
    }
    return null;
  }
}




Java Source Code List

de.onyxbits.sensorreadout.AppRater.java
de.onyxbits.sensorreadout.ExportTask.java
de.onyxbits.sensorreadout.OverviewActivity.java
de.onyxbits.sensorreadout.ReadoutActivity.java
de.onyxbits.sensorreadout.SensorAdapter.java
de.onyxbits.sensorreadout.Ticker.java
org.achartengine.ChartFactory.java
org.achartengine.GraphicalActivity.java
org.achartengine.GraphicalView.java
org.achartengine.ITouchHandler.java
org.achartengine.TouchHandlerOld.java
org.achartengine.TouchHandler.java
org.achartengine.chart.AbstractChart.java
org.achartengine.chart.BarChart.java
org.achartengine.chart.BubbleChart.java
org.achartengine.chart.ClickableArea.java
org.achartengine.chart.CombinedXYChart.java
org.achartengine.chart.CubicLineChart.java
org.achartengine.chart.DialChart.java
org.achartengine.chart.DoughnutChart.java
org.achartengine.chart.LineChart.java
org.achartengine.chart.PieChart.java
org.achartengine.chart.PieMapper.java
org.achartengine.chart.PieSegment.java
org.achartengine.chart.PointStyle.java
org.achartengine.chart.RangeBarChart.java
org.achartengine.chart.RangeStackedBarChart.java
org.achartengine.chart.RoundChart.java
org.achartengine.chart.ScatterChart.java
org.achartengine.chart.TimeChart.java
org.achartengine.chart.XYChart.java
org.achartengine.model.CategorySeries.java
org.achartengine.model.MultipleCategorySeries.java
org.achartengine.model.Point.java
org.achartengine.model.RangeCategorySeries.java
org.achartengine.model.SeriesSelection.java
org.achartengine.model.TimeSeries.java
org.achartengine.model.XYMultipleSeriesDataset.java
org.achartengine.model.XYSeries.java
org.achartengine.model.XYValueSeries.java
org.achartengine.renderer.BasicStroke.java
org.achartengine.renderer.DefaultRenderer.java
org.achartengine.renderer.DialRenderer.java
org.achartengine.renderer.SimpleSeriesRenderer.java
org.achartengine.renderer.XYMultipleSeriesRenderer.java
org.achartengine.renderer.XYSeriesRenderer.java
org.achartengine.tools.AbstractTool.java
org.achartengine.tools.FitZoom.java
org.achartengine.tools.PanListener.java
org.achartengine.tools.Pan.java
org.achartengine.tools.ZoomEvent.java
org.achartengine.tools.ZoomListener.java
org.achartengine.tools.Zoom.java
org.achartengine.util.IndexXYMap.java
org.achartengine.util.MathHelper.java
org.achartengine.util.XYEntry.java