Android Open Source - customhellochartdemo Preview Chart Computator

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License

The source code is released under:

Apache License

Java Source Code

package lecho.lib.hellocharts;
/*from  w  w  w  .  j  a v a  2  s .c  o m*/
import lecho.lib.hellocharts.model.Viewport;

/**
 * Version of ChartComputator for preview charts. It always uses maxViewport as visible viewport and currentViewport as
 * preview area.
 */
public class PreviewChartComputator extends ChartComputator {

  public float computeRawX(float valueX) {
    final float pixelOffset = (valueX - maxViewport.left) * (contentRect.width() / maxViewport.width());
    return contentRect.left + pixelOffset;
  }

  public float computeRawY(float valueY) {
    final float pixelOffset = (valueY - maxViewport.bottom) * (contentRect.height() / maxViewport.height());
    return contentRect.bottom - pixelOffset;
  }

  public Viewport getVisibleViewport() {
    return maxViewport;
  }

  public void setVisibleViewport(Viewport visibleViewport) {
    setMaxViewport(visibleViewport);
  }

  public void constrainViewport(float left, float top, float right, float bottom) {
    super.constrainViewport(left, top, right, bottom);
    viewportChangeListener.onViewportChanged(currentViewport);
  }

}

Java Source Code List

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