public Attacher(DraweeView<GenericDraweeHierarchy> draweeView) {
mDraweeView = new WeakReference<DraweeView<GenericDraweeHierarchy>>(draweeView);
draweeView.getHierarchy().setActualImageScaleType(ScalingUtils.ScaleType.FIT_CENTER);
draweeView.setOnTouchListener(this);
mScaleDragDetector = new ScaleDragDetector(draweeView.getContext(), this);
mGestureDetector =
new GestureDetectorCompat(
draweeView.getContext(),
new GestureDetector.SimpleOnGestureListener() {
@Override
public void onLongPress(MotionEvent e) {
super.onLongPress(e);
if (null != mLongClickListener) {
mLongClickListener.onLongClick(getDraweeView());
}
}
});
mGestureDetector.setOnDoubleTapListener(new DefaultOnDoubleTapListener(this));
}
@Override
public void onFling(float startX, float startY, float velocityX, float velocityY) {
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView == null) {
return;
}
mCurrentFlingRunnable = new FlingRunnable(draweeView.getContext());
mCurrentFlingRunnable.fling(getViewWidth(), getViewHeight(), (int) velocityX, (int) velocityY);
draweeView.post(mCurrentFlingRunnable);
}