Android Open Source - JiangHomeStyle_Android_Phone H Scroll View Touch Logic

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License

The source code is released under:

Apache License

Java Source Code

package com.cidesign.jianghomestylephone.widget;
//from  ww w  .  j ava2s.  co  m
import android.view.MotionEvent;
import android.view.View;
import android.widget.HorizontalScrollView;
import android.widget.ImageButton;

public class HScrollViewTouchLogic implements View.OnTouchListener
{
  private static final String TAG = HScrollViewTouchLogic.class.getSimpleName();

  private ImageButton leftBtn;
  private ImageButton rightBtn;

  private boolean leftBtnVisiable = false;
  private boolean rightBtnVisiable = false;
  private HorizontalScrollView scrollView;

  public HScrollViewTouchLogic(ImageButton leftBtn, ImageButton rightBtn, HorizontalScrollView scrollView)
  {
    this.leftBtn = leftBtn;
    this.rightBtn = rightBtn;
    this.scrollView = scrollView;
  }

  public boolean isLeftBtnVisiable()
  {
    return leftBtnVisiable;
  }

  public void setLeftBtnVisiable(boolean leftBtnVisiable)
  {
    this.leftBtnVisiable = leftBtnVisiable;
  }

  public boolean isRightBtnVisiable()
  {
    return rightBtnVisiable;
  }

  public void setRightBtnVisiable(boolean rightBtnVisiable)
  {
    this.rightBtnVisiable = rightBtnVisiable;
  }

  @Override
  public boolean onTouch(View v, MotionEvent event)
  {
    if (event.getAction() == MotionEvent.ACTION_DOWN)
    {
      View view = (View) scrollView.getChildAt(scrollView.getChildCount() - 1);
      int subViewWidth = view.getRight();
      int x = scrollView.getScrollX();
      if (subViewWidth - x - scrollView.getWidth() == 0)
      {
        rightBtn.setVisibility(View.INVISIBLE);
        leftBtn.bringToFront();
        leftBtn.setVisibility(View.VISIBLE);
      }
      else
      {
        rightBtn.setVisibility(View.VISIBLE);
      }

      if (x > 100)
      {
        leftBtn.setVisibility(View.VISIBLE);
      }
    }
    else if (event.getAction() == MotionEvent.ACTION_UP)
    {
      leftBtn.setVisibility(View.INVISIBLE);
      rightBtn.setVisibility(View.INVISIBLE);
    }

    return false;
  }
}

Java Source Code List

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