Android Open Source - customhellochartdemo Column Chart View

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Back to project page customhellochartdemo.

License

The source code is released under:

Apache License

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Java Source Code

package lecho.lib.hellocharts.view;
/*from   w  ww.ja  v  a 2  s .c o  m*/
import lecho.lib.hellocharts.BuildConfig;
import lecho.lib.hellocharts.model.ColumnChartData;
import lecho.lib.hellocharts.model.ColumnValue;
import lecho.lib.hellocharts.model.SelectedValue;
import lecho.lib.hellocharts.provider.ColumnChartDataProvider;
import lecho.lib.hellocharts.renderer.ColumnChartRenderer;
import android.content.Context;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.util.Log;

/**
 * ColumnChart/BarChart, supports subcolumns, stacked collumns and negative values.
 * 
 * @author Leszek Wach
 * 
 */
public class ColumnChartView extends AbstractChartView implements ColumnChartDataProvider {
  private static final String TAG = "ColumnChartView";
  private ColumnChartData data;
  private ColumnChartOnValueTouchListener onValueTouchListener = new DummyOnValueTouchListener();

  public ColumnChartView(Context context) {
    this(context, null, 0);
  }

  public ColumnChartView(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
  }

  public ColumnChartView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    chartRenderer = new ColumnChartRenderer(context, this, this);
    setColumnChartData(ColumnChartData.generateDummyData());
  }

  @Override
  public ColumnChartData getColumnChartData() {
    return data;
  }

  @Override
  public void setColumnChartData(ColumnChartData data) {
    if (BuildConfig.DEBUG) {
      Log.d(TAG, "Setting data for ColumnChartView");
    }

    if (null == data) {
      this.data = ColumnChartData.generateDummyData();
    } else {
      this.data = data;
    }
    axesRenderer.initAxesAttributes();
    chartRenderer.initDataAttributes();
    chartRenderer.initMaxViewport();
    chartRenderer.initCurrentViewport();

    ViewCompat.postInvalidateOnAnimation(ColumnChartView.this);

  }

  @Override
  public ColumnChartData getChartData() {
    return data;
  }

  @Override
  public void callTouchListener() {
    SelectedValue selectedValue = chartRenderer.getSelectedValue();

    if (selectedValue.isSet()) {
      ColumnValue value = data.getColumns().get(selectedValue.getFirstIndex()).getValues()
          .get(selectedValue.getSecondIndex());
      onValueTouchListener.onValueTouched(selectedValue.getFirstIndex(), selectedValue.getSecondIndex(), value);
    } else {
      onValueTouchListener.onNothingTouched();
    }
  }

  public ColumnChartOnValueTouchListener getOnValueTouchListener() {
    return onValueTouchListener;
  }

  public void setOnValueTouchListener(ColumnChartOnValueTouchListener touchListener) {
    if (null == touchListener) {
      this.onValueTouchListener = new DummyOnValueTouchListener();
    } else {
      this.onValueTouchListener = touchListener;
    }
  }

  public interface ColumnChartOnValueTouchListener {

    public void onValueTouched(int selectedLine, int selectedValue, ColumnValue point);

    public void onNothingTouched();

  }

  private static class DummyOnValueTouchListener implements ColumnChartOnValueTouchListener {

    @Override
    public void onValueTouched(int selectedLine, int selectedValue, ColumnValue value) {
    }

    @Override
    public void onNothingTouched() {
    }

  }

}

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