/**
 * 高度自適應內容的ViewPager
 * Created by cheng on 2018/1/12.
 */

public class WrapContentHeightViewPager extends ViewPager {

    private int current;
    private int height = 0;

    private boolean scrollble = true;

    public WrapContentHeightViewPager(Context context) {
        super(context);
    }

    public WrapContentHeightViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        if (getChildCount() > current) {
            View child = getChildAt(current);
            child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
            int h = child.getMeasuredHeight();
            height = h;
        }

        heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

//每次viewpage切換時呼叫進行高度重新適配
    public void resetHeight(int current) {
        this.current = current;
        if (getChildCount() > current) {
            LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) getLayoutParams();
            if (layoutParams == null) {
                layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, height);
            } else {
                layoutParams.height = height;
            }
            setLayoutParams(layoutParams);
        }
    }

    //不允許左右滑動
    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        //允許左右滑動
//        if (!scrollble) {
//            return true;
//        }
//        return super.onTouchEvent(ev);
        return false;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        return false;
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        return super.dispatchTouchEvent(ev);
    }

    public boolean isScrollble() {
        return scrollble;
    }

    public void setScrollble(boolean scrollble) {
        this.scrollble = scrollble;
    }

}