Java Code Examples for android.view.ViewTreeObserver#removeOnPreDrawListener()

private void checkCurrentDimens() {
    if (cbs.isEmpty()) {
        return;
    }

    int currentWidth = getViewWidthOrParam();
    int currentHeight = getViewHeightOrParam();
    if (!isSizeValid(currentWidth) || !isSizeValid(currentHeight)) {
        return;
    }

    notifyCbs(currentWidth, currentHeight);
    // Keep a reference to the layout listener and remove it here
    // rather than having the observer remove itself because the observer
    // we add the listener to will be almost immediately merged into
    // another observer and will therefore never be alive. If we instead
    // keep a reference to the listener and remove it here, we get the
    // current view tree observer and should succeed.
    ViewTreeObserver observer = view.getViewTreeObserver();
    if (observer.isAlive()) {
        observer.removeOnPreDrawListener(layoutListener);
    }
    layoutListener = null;
}
 

@Override
public boolean onPreDraw() {
    ImageView target = this.target.get();
    if (target == null) {
        return true;
    }
    ViewTreeObserver vto = target.getViewTreeObserver();
    if (!vto.isAlive()) {
        return true;
    }

    int width = target.getWidth();
    int height = target.getHeight();

    if (width <= 0 || height <= 0) {
        return true;
    }

    vto.removeOnPreDrawListener(this);

    this.creator.unfit().resize(width, height).into(target, callback);
    return true;
}
 

@Override
public boolean onPreDraw() {
    ImageView target = this.target.get();
    if (target == null) {
        return true;
    }
    ViewTreeObserver vto = target.getViewTreeObserver();
    if (!vto.isAlive()) {
        return true;
    }

    int width = target.getWidth();
    int height = target.getHeight();

    if (width <= 0 || height <= 0) {
        return true;
    }

    vto.removeOnPreDrawListener(this);

    this.creator.unfit().resize(width, height).into(target, callback);
    return true;
}
 

void mount(
    ComponentTree contentComponentTree,
    final ScrollPosition scrollPosition,
    boolean isIncrementalMountEnabled) {
  mLithoView.setComponentTree(contentComponentTree);

  mIsIncrementalMountEnabled = isIncrementalMountEnabled;
  mScrollPosition = scrollPosition;
  final ViewTreeObserver.OnPreDrawListener onPreDrawListener =
      new ViewTreeObserver.OnPreDrawListener() {
        @Override
        public boolean onPreDraw() {
          setScrollY(scrollPosition.y);
          ViewTreeObserver currentViewTreeObserver = getViewTreeObserver();
          if (currentViewTreeObserver.isAlive()) {
            currentViewTreeObserver.removeOnPreDrawListener(this);
          }
          return true;
        }
      };
  getViewTreeObserver().addOnPreDrawListener(onPreDrawListener);

  mOnPreDrawListener = onPreDrawListener;
}
 

@Override public boolean onPreDraw() {
  ImageView target = this.target;

  ViewTreeObserver vto = target.getViewTreeObserver();
  if (!vto.isAlive()) {
    return true;
  }

  int width = target.getWidth();
  int height = target.getHeight();

  if (width <= 0 || height <= 0) {
    return true;
  }

  target.removeOnAttachStateChangeListener(this);
  vto.removeOnPreDrawListener(this);

  this.creator.unfit().resize(width, height).into(target, callback);
  return true;
}
 

void cancel() {
    callback = null;
    ImageView target = this.target.get();
    if (target == null) {
        return;
    }
    ViewTreeObserver vto = target.getViewTreeObserver();
    if (!vto.isAlive()) {
        return;
    }
    vto.removeOnPreDrawListener(this);
}
 

void cancel() {
    callback = null;
    ImageView target = this.target.get();
    if (target == null) {
        return;
    }
    ViewTreeObserver vto = target.getViewTreeObserver();
    if (!vto.isAlive()) {
        return;
    }
    vto.removeOnPreDrawListener(this);
}
 

void onDetachedFromWindow() {
  ViewTreeObserver viewTreeObserver = view.getViewTreeObserver();
  if (preDrawListener != null) {
    viewTreeObserver.removeOnPreDrawListener(preDrawListener);
    preDrawListener = null;
  }
}
 

@Override
public void onDetachedFromWindow() {
    super.onDetachedFromWindow();
    resetTouchBehaviors();
    stopScrollBarsWaken();
    if (mNeedsPreDrawListener && mOnPreDrawListener != null) {
        final ViewTreeObserver vto = getViewTreeObserver();
        vto.removeOnPreDrawListener(mOnPreDrawListener);
    }
    if (mNestedScrollingTarget != null) {
        onStopNestedScroll(mNestedScrollingTarget);
    }
    mIsAttachedToWindow = false;
}
 

/**
 * Remove the pre-draw listener if we're attached to a window and mark that we currently
 * do not need it when attached.
 */
void removePreDrawListener() {
    if (mIsAttachedToWindow) {
        if (mOnPreDrawListener != null) {
            final ViewTreeObserver vto = getViewTreeObserver();
            vto.removeOnPreDrawListener(mOnPreDrawListener);
        }
    }
    mNeedsPreDrawListener = false;
}
 

void cancel() {
  creator.clearTag();
  callback = null;

  target.removeOnAttachStateChangeListener(this);

  ViewTreeObserver vto = target.getViewTreeObserver();
  if (vto.isAlive()) {
    vto.removeOnPreDrawListener(this);
  }
}