Android Open Source - customhellochartdemo Bubble Chart Activity

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License

The source code is released under:

Apache License

Java Source Code

package lecho.lib.hellocharts.samples;
//  w w  w .  j  a va2  s .c o  m
import java.util.ArrayList;
import java.util.List;

import lecho.lib.hellocharts.gesture.ZoomType;
import lecho.lib.hellocharts.model.Axis;
import lecho.lib.hellocharts.model.BubbleChartData;
import lecho.lib.hellocharts.model.BubbleValue;
import lecho.lib.hellocharts.model.ValueShape;
import lecho.lib.hellocharts.util.Utils;
import lecho.lib.hellocharts.view.BubbleChartView;
import lecho.lib.hellocharts.view.Chart;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

public class BubbleChartActivity extends ActionBarActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_bubble_chart);
    if (savedInstanceState == null) {
      getSupportFragmentManager().beginTransaction().add(R.id.container, new PlaceholderFragment()).commit();
    }
  }

  /**
   * A fragment containing a bubble chart.
   */
  public static class PlaceholderFragment extends Fragment {

    private static final int BUBBLES_NUM = 8;

    private BubbleChartView chart;
    private BubbleChartData data;
    private boolean hasAxes = true;
    private boolean hasAxesNames = true;
    private ValueShape shape = ValueShape.CIRCLE;
    private boolean hasLabels = false;
    private boolean hasLabelForSelected = false;

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
      setHasOptionsMenu(true);
      View rootView = inflater.inflate(R.layout.fragment_bubble_chart, container, false);

      chart = (BubbleChartView) rootView.findViewById(R.id.chart);
      chart.setOnValueTouchListener(new ValueTouchListener());

      generateData();

      return rootView;
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
      inflater.inflate(R.menu.bubble_chart, menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
      int id = item.getItemId();
      if (id == R.id.action_reset) {
        reset();
        generateData();
        return true;
      }
      if (id == R.id.action_shape_circles) {
        setCircles();
        return true;
      }
      if (id == R.id.action_shape_square) {
        setSquares();
        return true;
      }
      if (id == R.id.action_toggle_labels) {
        toggleLabels();
        return true;
      }
      if (id == R.id.action_toggle_axes) {
        toggleAxes();
        return true;
      }
      if (id == R.id.action_toggle_axes_names) {
        toggleAxesNames();
        return true;
      }
      if (id == R.id.action_animate) {
        prepareDataAnimation();
        chart.startDataAnimation();
        return true;
      }
      if (id == R.id.action_toggle_selection_mode) {
        toggleLabelForSelected();
        Toast.makeText(getActivity(),
            "Selection mode set to " + chart.isValueSelectionEnabled() + " select any point.",
            Toast.LENGTH_SHORT).show();
        return true;
      }
      if (id == R.id.action_toggle_touch_zoom) {
        chart.setZoomEnabled(!chart.isZoomEnabled());
        Toast.makeText(getActivity(), "IsZoomEnabled " + chart.isZoomEnabled(), Toast.LENGTH_SHORT).show();
        return true;
      }
      if (id == R.id.action_zoom_both) {
        chart.setZoomType(ZoomType.HORIZONTAL_AND_VERTICAL);
        return true;
      }
      if (id == R.id.action_zoom_horizontal) {
        chart.setZoomType(ZoomType.HORIZONTAL);
        return true;
      }
      if (id == R.id.action_zoom_vertical) {
        chart.setZoomType(ZoomType.VERTICAL);
        return true;
      }
      return super.onOptionsItemSelected(item);
    }

    private void reset() {
      hasAxes = true;
      hasAxesNames = true;
      shape = ValueShape.CIRCLE;
      hasLabels = false;
      hasLabelForSelected = false;

      chart.setValueSelectionEnabled(hasLabelForSelected);
    }

    private void generateData() {

      List<BubbleValue> values = new ArrayList<BubbleValue>();
      for (int i = 0; i < BUBBLES_NUM; ++i) {
        BubbleValue value = new BubbleValue(i, (float) Math.random() * 100, (float) Math.random() * 1000);
        value.setColor(Utils.pickColor());
        value.setShape(shape);
        values.add(value);
      }

      data = new BubbleChartData(values);
      data.setHasLabels(hasLabels);
      data.setHasLabelsOnlyForSelected(hasLabelForSelected);

      if (hasAxes) {
        Axis axisX = new Axis();
        Axis axisY = new Axis().setHasLines(true);
        if (hasAxesNames) {
          axisX.setName("Axis X");
          axisY.setName("Axis Y");
        }
        data.setAxisXBottom(axisX);
        data.setAxisYLeft(axisY);
      } else {
        data.setAxisXBottom(null);
        data.setAxisYLeft(null);
      }

      chart.setBubbleChartData(data);

    }

    private void setCircles() {
      shape = ValueShape.CIRCLE;
      generateData();
    }

    private void setSquares() {
      shape = ValueShape.SQUARE;
      generateData();
    }

    private void toggleLabels() {
      hasLabels = !hasLabels;

      if (hasLabels) {
        hasLabelForSelected = false;
        chart.setValueSelectionEnabled(hasLabelForSelected);
      }

      generateData();
    }

    private void toggleLabelForSelected() {
      hasLabelForSelected = !hasLabelForSelected;

      chart.setValueSelectionEnabled(hasLabelForSelected);

      if (hasLabelForSelected) {
        hasLabels = false;
      }

      generateData();
    }

    private void toggleAxes() {
      hasAxes = !hasAxes;

      generateData();
    }

    private void toggleAxesNames() {
      hasAxesNames = !hasAxesNames;

      generateData();
    }

    /**
     * To animate values you have to change targets values and then call {@link Chart#startDataAnimation()}
     * method(don't confuse with View.animate()).
     */
    private void prepareDataAnimation() {
      for (BubbleValue value : data.getValues()) {
        value.setTarget(value.getX() + (float) Math.random() * 4 * getSign(), (float) Math.random() * 100,
            (float) Math.random() * 1000);
      }
    }

    private int getSign() {
      int[] sign = new int[] { -1, 1 };
      return sign[Math.round((float) Math.random())];
    }

    private class ValueTouchListener implements BubbleChartView.BubbleChartOnValueTouchListener {

      @Override
      public void onValueTouched(int selectedBubble, BubbleValue value) {
        Toast.makeText(getActivity(), "Selected: " + value, Toast.LENGTH_SHORT).show();
      }

      @Override
      public void onNothingTouched() {
        // TODO Auto-generated method stub

      }
    }
  }
}

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