public CancelPage(RecordingPageModel vm)
{
// Hide navigation bar
NavigationPage.SetHasNavigationBar(this, false);
// Subscribe notification of locale changes to update text based on locale
MessagingCenter.Subscribe <App>(this, MessageKeys.UpdateByLanguageChange, (obj) =>
{
// Update text that has been translated into the current language.
CancelLabel.Text = AppResources.CancelRecording;
});
InitializeComponent();
Init(vm);
}
public RecordingPage(RecordingPageModel viewModel)
{
BindingContext = ViewModel = viewModel;
InitializeComponent();
UpdateColor();
RegisterForEvents();
RecordingEffectAnimation = false;
TimeFlickeringAnimation = false;
SetBinding(RecordingEffectAnimationProperty, new Binding("RecordingEffectOn", mode: BindingMode.Default));
SetBinding(TimeFlickeringAnimationProperty, new Binding("TimeFlickeringOn", mode: BindingMode.Default));
Init();
}
// Draw animation effects depending on volume level
private async Task CheckVolumeAndResizeAnimationAsync()
{
RecordingPageModel recordingViewModel = (RecordingPageModel)BindingContext;
if (recordingViewModel.AudioRecordingService.State == AudioRecordState.Recording)
{
double fScaleValue = 0, fShodowScaleValue = 0;
double volume = recordingViewModel.AudioRecordingService.GetRecordingLevel(); //-300 ~ 0
int uwLevel = 0;
int uwShadowLevel = 0;
int effectLevel = 0;
double db = volume;
const int VOLUME_LEVEL_MIN = -55;
const int VOLUME_LEVEL_MAX = -10;
const double LINEAR_VI_SCALE = 1.0 / 20.0;
if (db < VOLUME_LEVEL_MIN)
{
effectLevel = 0;
}
else if (db > VOLUME_LEVEL_MAX)
{
effectLevel = VOLUME_LEVEL_MAX - VOLUME_LEVEL_MIN;
}
else
{
effectLevel = (int)(db - VOLUME_LEVEL_MIN);
}
uwLevel = effectLevel;
if (uwLevel > 1)
{
uwShadowLevel = uwLevel / 4 + (new Random().Next() % (uwLevel / 2));
}
if (uwLevel > prevAudioLevel)
{
fScaleValue = (30 + 70 * (uwLevel) / (VOLUME_LEVEL_MAX - VOLUME_LEVEL_MIN)) / 100.0;
fShodowScaleValue = (30 + 70 * (uwShadowLevel) / (VOLUME_LEVEL_MAX - VOLUME_LEVEL_MIN)) / 100.0;
if (fScaleValue < prevScale)
{
fScaleValue = prevScale - LINEAR_VI_SCALE;
}
if (fShodowScaleValue < prevShadowScale)
{
fShodowScaleValue = prevShadowScale - LINEAR_VI_SCALE;
}
}
else
{
fScaleValue = prevScale - LINEAR_VI_SCALE;
fShodowScaleValue = prevShadowScale - LINEAR_VI_SCALE;
}
if (fScaleValue < 0.3)
{
fScaleValue = 0.3;
}
else if (fScaleValue > 1.0)
{
fScaleValue = 1.0;
}
if (fShodowScaleValue < 0.3)
{
fShodowScaleValue = 0.3;
}
else if (fShodowScaleValue > 1.0)
{
fShodowScaleValue = 1.0;
}
int actualSize = (int)(fScaleValue * 360);
int acutalShadowSize = (int)(fShodowScaleValue * 360);
await DrawVolumeEffectAnimationAsync(actualSize, acutalShadowSize);
prevAudioLevel = uwLevel;
prevScale = fScaleValue;
prevShadowScale = fShodowScaleValue;
}
}
void Init(RecordingPageModel vm)
{
BindingContext = ViewModel = vm;
}
// Draw animation effects depending on volume level
private bool CheckVolumeAndResizeAnimationAsync()
{
RecordingPageModel recordingViewModel = (RecordingPageModel)BindingContext;
// @20180217-vincent: async chain can be stopped by using Task.Factory.StartNew(...)
// Device.InovkeOnMainThread was removed because it is guaranteed main thread
Task.Factory.StartNew(async() =>
{
if (recordingViewModel.AudioRecordingService.State == AudioRecordState.Recording)
{
double fScaleValue = 0, fShodowScaleValue = 0;
double volume = recordingViewModel.AudioRecordingService.GetRecordingLevel(); //-300 ~ 0
int uwLevel = 0;
int uwShadowLevel = 0;
int effectLevel = 0;
double db = volume;
const int VOLUME_LEVEL_MIN = -55;
const int VOLUME_LEVEL_MAX = -10;
const double LINEAR_VI_SCALE = 1.0 / 20.0;
if (db < VOLUME_LEVEL_MIN)
{
effectLevel = 0;
}
else if (db > VOLUME_LEVEL_MAX)
{
effectLevel = VOLUME_LEVEL_MAX - VOLUME_LEVEL_MIN;
}
else
{
effectLevel = (int)(db - VOLUME_LEVEL_MIN);
}
uwLevel = effectLevel;
if (uwLevel > 1)
{
uwShadowLevel = uwLevel / 4 + (new Random().Next() % (uwLevel / 2));
}
if (uwLevel > prevAudioLevel)
{
fScaleValue = (30 + 70 * (uwLevel) / (VOLUME_LEVEL_MAX - VOLUME_LEVEL_MIN)) / 100.0;
fShodowScaleValue = (30 + 70 * (uwShadowLevel) / (VOLUME_LEVEL_MAX - VOLUME_LEVEL_MIN)) / 100.0;
if (fScaleValue < prevScale)
{
fScaleValue = prevScale - LINEAR_VI_SCALE;
}
if (fShodowScaleValue < prevShadowScale)
{
fShodowScaleValue = prevShadowScale - LINEAR_VI_SCALE;
}
}
else
{
fScaleValue = prevScale - LINEAR_VI_SCALE;
fShodowScaleValue = prevShadowScale - LINEAR_VI_SCALE;
}
if (fScaleValue < 0.3)
{
fScaleValue = 0.3;
}
else if (fScaleValue > 1.0)
{
fScaleValue = 1.0;
}
if (fShodowScaleValue < 0.3)
{
fShodowScaleValue = 0.3;
}
else if (fShodowScaleValue > 1.0)
{
fShodowScaleValue = 1.0;
}
int actualSize = (int)(fScaleValue * 360);
int acutalShadowSize = (int)(fShodowScaleValue * 360);
await DrawVolumeEffectAnimationAsync(actualSize, acutalShadowSize);
prevAudioLevel = uwLevel;
prevScale = fScaleValue;
prevShadowScale = fShodowScaleValue;
}
});
return(((RecordingPageModel)BindingContext).RecordingEffectOn);
}