How to use

ChopsticksFactory

in

cn.campusapp.chopsticks

/**
 * To get a helper for a view in relative layout
 * The view in the factory should HAS default layout param, usually inflated from xml
 *
 * @return helper to layout isInRelative layout
 */
public RelativeLayoutStick isInRelative() {
  return (RelativeLayoutStick) isInLayout(RelativeLayout.LayoutParams.class, true, 0, 0);
}

/**
 * Choose the right builder stick according to layout params type
 *
 * @param layoutParamsType say {@link android.widget.LinearLayout.LayoutParams}
 * @param useExistingLayoutParams if true, no LayoutParams will be instantiated
 * @param width if not useExistingLayoutParams, new LayoutParams will use this as its width
 * @param height if not useExistingLayoutParams, new LayoutParams will use this as its height
 * @param <LP> the LayoutParam generic type
 * @return the corresponding builder stick
 */
private <LP extends ViewGroup.LayoutParams> Chopstick isInLayout(Class<LP> layoutParamsType, boolean useExistingLayoutParams,
                             int width, int height){
  LP lp = useExistingLayoutParams
      ? useExistingLayoutParams(layoutParamsType)
      : useNewLayoutParams(layoutParamsType, width, height);
  if (RelativeLayout.LayoutParams.class.equals(layoutParamsType)) {
    return new RelativeLayoutStick((RelativeLayout.LayoutParams) lp, mView);
  }
  else if(LinearLayout.LayoutParams.class.equals(layoutParamsType)){
    return new LinearLayoutStick((LinearLayout.LayoutParams)lp, mView);
  }
  throw new UnsupportedOperationException("This Layout is not currently supported. A PR is welcome!");
}

public static ChopsticksFactory chop(@NonNull View view){
  return new ChopsticksFactory(view);
}

chop(findViewById(R.id.top_right)).isInRelative()
    .alignParentTop()
    .alignParentRight()
    .stick();
chop(findViewById(R.id.center)).isInRelative()
    .centerInParent()
    .stick();
chop(findViewById(R.id.below_center_align_left)).isInRelative()
    .below(R.id.center)
    .alignLeft(R.id.center)
chop(findViewById(R.id.center_left_align_top)).isInRelative()
    .toLeftOf(R.id.center)
    .alignTop(R.id.center)
textView.setText("BOTTOM CENTER HORIZONTAL");
textView.setId(R.id.bottom_center_horizontal);
chop(textView).isInRelative(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)
    .alignParentBottom()
    .centerHorizontal()

/**
 * To get a helper for a view in relative layout
 * The view in the factory should HAS NO default layout param, usually instantiated programmatically
 *
 * @param width  mostly the {@link ViewGroup.LayoutParams#WRAP_CONTENT} or {@link ViewGroup.LayoutParams#MATCH_PARENT}
 * @param height mostly the {@link ViewGroup.LayoutParams#WRAP_CONTENT} or {@link ViewGroup.LayoutParams#MATCH_PARENT}
 * @return helper to layout isInRelative layout
 */
public RelativeLayoutStick isInRelative(int width, int height){
  return (RelativeLayoutStick) isInLayout(RelativeLayout.LayoutParams.class, false, width, height);
}

public LinearLayoutStick isInLinear(){
  return (LinearLayoutStick) isInLayout(LinearLayout.LayoutParams.class, true, 0, 0);
}

public LinearLayoutStick isInLinear(int width, int height){
  return (LinearLayoutStick) isInLayout(LinearLayout.LayoutParams.class, false, width, height);
}