/**
* Called before a slide change happens. By returning false, one can disallow the slide change.
*
* @return true, if the slide change should be allowed, else false
*/
private boolean handleBeforeSlideChanged() {
Fragment currentFragment = mPagerAdapter.getItem(pager.getCurrentItem());
LogHelper.d(
TAG,
String.format(
"User wants to move away from slide: %s. Checking if this should be allowed...",
currentFragment));
// Check if the current fragment implements ISlidePolicy, else a change is always allowed
if (currentFragment instanceof ISlidePolicy) {
ISlidePolicy slide = (ISlidePolicy) currentFragment;
LogHelper.d(TAG, "Current fragment implements ISlidePolicy.");
// Check if policy is fulfilled
if (!slide.isPolicyRespected()) {
LogHelper.d(TAG, "Slide policy not respected, denying change request.");
return false;
}
}
LogHelper.d(TAG, "Change request will be allowed.");
return true;
}
private void handleIllegalSlideChangeAttempt() {
Fragment currentFragment = mPagerAdapter.getItem(pager.getCurrentItem());
if (currentFragment != null && currentFragment instanceof ISlidePolicy) {
ISlidePolicy slide = (ISlidePolicy) currentFragment;
if (!slide.isPolicyRespected()) {
slide.onUserIllegallyRequestedNextPage();
}
}
}