/** Handles reset button click. */
private void onZoomResetButtonClick() {
// resets image view scale and translation and makes it fit in screen's center
mPinchToZoomTransformation.reset();
updateImageView();
updateZoomTextViewText();
scaleTv(0, mImageViewWidth / 2.0f, mImageViewHeight / 2.0f);
}
/** Updates application UI and image on TV according to rotation values. */
private void updateUiAndTvRotation(RotationDirection rotationDirection) {
PinchToZoomTransformation.RotationDirection pinchToZoomRotationDirection =
rotationDirection == RotationDirection.CLOCKWISE
? PinchToZoomTransformation.RotationDirection.CLOCKWISE
: PinchToZoomTransformation.RotationDirection.COUNTER_CLOCKWISE;
mPinchToZoomTransformation.updateRotationAndFitInBounds(pinchToZoomRotationDirection);
updateImageView();
scaleTv(0, mImageViewWidth / 2.0f, mImageViewHeight / 2.0f);
updateZoomTextViewText();
}
/** Updates application UI and image on TV according to scale values. */
private void updateUiAndTvScale(float scaleFactorDelta, float scalePointX, float scalePointY) {
// rounds scale values so that they are the same as those accepted by ViewController
float roundedScaleFactorDelta = (float) ((int) (scaleFactorDelta * 100)) / 100;
float roundedScalePointX = (int) scalePointX;
float roundedScalePointY = (int) scalePointY;
// applies rounded scale to transformation object
// additionally the scale that was applied after bounds check is stored in newScaleFactorDelta
float newScaleFactorDelta =
mPinchToZoomTransformation.updateScaleInBounds(
roundedScaleFactorDelta, roundedScalePointX, roundedScalePointY);
updateImageView();
scaleTv(newScaleFactorDelta, roundedScalePointX, roundedScalePointY);
updateZoomTextViewText();
}
