@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
if (mPaused) return false;
ImageViewTouch imageView = mImageView;
if (imageView.getScale() > 1F) {
imageView.postTranslateCenter(-distanceX, -distanceY);
}
return true;
}
@Override
public boolean onDoubleTap(MotionEvent e) {
if (mPaused) return false;
ImageViewTouch imageView = mImageView;
// Switch between the original scale and 3x scale.
if (imageView.getScale() > 2F) {
mImageView.zoomTo(1f);
} else {
mImageView.zoomToPoint(3f, e.getX(), e.getY());
}
return true;
}
private void updateZoomButtonsEnabled() {
ImageViewTouch imageView = mImageView;
float scale = imageView.getScale();
mZoomButtonsController.setZoomInEnabled(scale < imageView.mMaxZoom);
mZoomButtonsController.setZoomOutEnabled(scale > 1);
}