protected void zoomToPoint(float scale, float pointX, float pointY) {
float cx = getWidth() / 2F;
float cy = getHeight() / 2F;
panBy(cx - pointX, cy - pointY);
zoomTo(scale, cx, cy);
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() && !event.isCanceled()) {
if (getScale() > 1.0f) {
// If we're zoomed in, pressing Back jumps out to show the
// entire image, otherwise Back returns the user to the gallery.
zoomTo(1.0f);
return true;
}
}
return super.onKeyUp(keyCode, event);
}
protected void zoomTo(float scale) {
float cx = getWidth() / 2F;
float cy = getHeight() / 2F;
zoomTo(scale, cx, cy);
}