@Override
public boolean dispatchTouchEvent(MotionEvent m) {
if (mZoomButtonsController.isVisible()) {
scheduleDismissOnScreenControls();
}
return super.dispatchTouchEvent(m);
}
@Override
protected void onDestroy() {
// This is necessary to make the ZoomButtonsController unregister
// its configuration change receiver.
if (mZoomButtonsController != null) {
mZoomButtonsController.setVisible(false);
}
super.onDestroy();
}
private void setupZoomButtonController(final View ownerView) {
mZoomButtonsController = new ZoomButtonsController(ownerView);
mZoomButtonsController.setAutoDismissed(false);
mZoomButtonsController.setZoomSpeed(100);
mZoomButtonsController.setOnZoomListener(
new ZoomButtonsController.OnZoomListener() {
public void onVisibilityChanged(boolean visible) {
if (visible) {
updateZoomButtonsEnabled();
}
}
public void onZoom(boolean zoomIn) {
if (zoomIn) {
mImageView.zoomIn();
} else {
mImageView.zoomOut();
}
mZoomButtonsController.setVisible(true);
updateZoomButtonsEnabled();
}
});
}
private void showOnScreenControls() {
// If the view has not been attached to the window yet, the
// zoomButtonControls will not able to show up. So delay it until the
// view has attached to window.
if (mRootView.getWindowToken() == null) {
mHandler.postGetterCallback(new Runnable() {
public void run() {
showOnScreenControls();
}
});
return;
}
// we may need to update the next/prev button due to index changing
updateNextPrevControls();
if (ImageManager.isImage(mAllImages.getImageAt(mCurrentPosition))) {
updateZoomButtonsEnabled();
mZoomButtonsController.setVisible(true);
} else {
mZoomButtonsController.setVisible(false);
}
}
private void hideOnScreenControls() {
if (mNextImageView.getVisibility() == View.VISIBLE) {
Animation a = mHideNextImageViewAnimation;
a.setDuration(500);
mNextImageView.startAnimation(a);
mNextImageView.setVisibility(View.INVISIBLE);
}
if (mPrevImageView.getVisibility() == View.VISIBLE) {
Animation a = mHidePrevImageViewAnimation;
a.setDuration(500);
mPrevImageView.startAnimation(a);
mPrevImageView.setVisibility(View.INVISIBLE);
}
mZoomButtonsController.setVisible(false);
}
private void updateZoomButtonsEnabled() {
ImageViewTouch2 imageView = mImageView;
float scale = imageView.getScale();
mZoomButtonsController.setZoomInEnabled(scale < imageView.mMaxZoom);
mZoomButtonsController.setZoomOutEnabled(scale > 1);
}
