public void PauseResumeButton_Click()
{
switch (mSession.State)
{
case Session.SessionState.Started:
SessionState = Session.SessionState.Paused;
break;
case Session.SessionState.Paused:
SessionState = Session.SessionState.Started;
break;
}
}
private void SessionState_Change(Session.SessionState state)
{
switch (state)
{
case Session.SessionState.Started:
mTimer.Start();
break;
case Session.SessionState.Paused:
mTimer.Pause();
break;
}
}
// Constructor
public SessionViewModel(Session session)
{
// Set instance variables
mSession = session;
mTimer = new SecondsTimer(mSession.Interval);
mSoundManager = new SoundManager();
// shuffle Session's list of image paths
Random randy = new Random();
mShuffledImagePaths = mSession.ImagePaths.OrderBy(path => randy.Next()).ToList();
// Handle changes to SecondsTimer's properties
mTimer.PropertyChanged += (sender, args) =>
{
switch (args.PropertyName)
{
case "State":
IntervalTimerState_Change(mTimer.State);
break;
case "RemainingSeconds":
IntervalTimerRemainingSeconds_Change(mTimer.RemainingSeconds);
break;
}
};
// Handle changes to Session's properties
mSession.PropertyChanged += (sender, args) =>
{
switch (args.PropertyName)
{
case "State":
SessionState_Change(mSession.State);
break;
}
};
// Initialize view to SecondsTimer's properties
IntervalTimerState_Change(mTimer.State);
IntervalTimerRemainingSeconds_Change(mTimer.RemainingSeconds);
// Initialize view to Session's properties
SessionState_Change(mSession.State);
// Display first image
CurrentImageIndex = 0;
CurrentImagePath = mShuffledImagePaths[CurrentImageIndex];
// Start the interval timer by setting SessionState to Started
SessionState = Session.SessionState.Started;
}
private void SessionState_Change(Session.SessionState state)
{
// Set pauseResumeButton's icon by setting its Style property,
// and set remainingTimeTextBlock's Background
Path p;
switch (state)
{
case Session.SessionState.Started:
p = (Path)pauseResumeButton.Content;
p.Style = (Style)FindResource("Icon.Pause");
remainingTimeTextBlock.Background = new SolidColorBrush(Color.FromArgb(0x7f, 0, 0, 0));
break;
case Session.SessionState.Paused:
p = (Path)pauseResumeButton.Content;
p.Style = (Style)FindResource("Icon.Play");
remainingTimeTextBlock.Background = new SolidColorBrush(Color.FromArgb(0x7f, 255, 0, 0));
break;
}
}