public override void OnHidden()
{
base.OnHidden();
AudioToolbar.AudioPlayer.AudioCompleted -= AudioPlayerOnAudioCompleted;
//inform the audio toolbar to clean up
AudioToolbar.OnHidden();
}
public override void OnRevealed()
{
base.OnRevealed();
AdjustToolbarColor();
AudioToolbar.AudioPlayer.AudioCompleted += AudioPlayerOnAudioCompleted;
//Register audio again
AudioToolbar.OnRevealed();
}
/// <summary>
/// Called when the page disappears.
/// </summary>
public override void OnDisappearing()
{
WillDisappear = true;
base.OnDisappearing();
AudioToolbar.AudioPlayer.AudioCompleted -= AudioPlayerOnAudioCompleted;
//inform the audio toolbar to clean up
AudioToolbar.OnDisappearing();
}
/// <summary>
/// Translates the audio toolbar on top of the screen or outside of it dependent on whether the toolbar
/// should be visible or not
/// </summary>
private void ToggleAudioBarVisibility()
{
if (ViewModel.AudioToolbarVisible)
{
AudioToolbar.TranslateTo(0, 0);
}
else
{
AudioToolbar.TranslateTo(0, -100);
}
}
/// <summary>
/// Set the current view.
/// </summary>
/// <returns></returns>
private async Task SetCurrentView()
{
// update UI
Page currentPage = pages[currentViewIndex];
AudioAvailable = currentPage.Audio != null;
if (!AudioAvailable)
{
AudioToolbarVisible = false;
}
AudioToolbar.SetNewAudioFile(currentPage.Audio);
switch (currentPage.PageType)
{
case PageType.AppetizerPage:
SelectedView = new AppetizerViewModel(Title, currentPage.AppetizerPage);
break;
case PageType.ImagePage:
SelectedView = new ImageViewModel(currentPage.ImagePage, ToggleVisibilityOfNavigationButtons);
break;
case PageType.TextPage:
SelectedView = new TextViewModel(currentPage.TextPage, ToggleVisibilityOfNavigationButtons);
break;
case PageType.TimeSliderPage:
SelectedView = new TimeSliderViewModel(currentPage.TimeSliderPage, ToggleVisibilityOfNavigationButtons);
break;
}
if (currentPage.AdditionalInformationPages != null && currentPage.AdditionalInformationPages.Any())
{
HasAdditionalInformation = true;
}
else
{
HasAdditionalInformation = false;
}
//Cancel disabling navigation buttons caused by page selected before
tokenSource?.Cancel();
//Toggle navigation buttons visibility for specific pages
switch (currentPage.PageType)
{
case PageType.ImagePage:
case PageType.TextPage:
case PageType.TimeSliderPage:
StartDelayedToggling();
break;
}
if (currentPage.Audio != null)
{
// ask if user wants autoamtic audio playback
if (Settings.RepeatHintAudio)
{
var result = await Navigation.DisplayAlert(Strings.ExhibitDetailsPage_Hinweis, Strings.ExhibitDetailsPage_AudioPlay,
Strings.ExhibitDetailsPage_AgreeFeature, Strings.ExhibitDetailsPage_DisagreeFeature);
Settings.AutoStartAudio = result;
Settings.RepeatHintAudio = false;
}
//play automatic audio, if wanted
if (Settings.AutoStartAudio)
{
AudioToolbar.AudioPlayer.Play();
}
}
}
