public void Timer_Elapsed(Object source, ElapsedEventArgs e)
{
// Set wallpaper to the image at the current Index
string path = Path.Combine(_dirPath, _wallpaper.Images[Index].Name);
if (!File.Exists(path))
{
Console.Error.WriteLine($"File doesn't exist: {path}");
}
DesktopManager.SetDesktopWallpaper(path);
// Persist current wallpaper's path via Settings
Properties.Settings.Default.LastSetWallpaperPath = path;
Properties.Settings.Default.Save(); // persist settings across application sessions
// Schedule _timer to run when the sun reaches the next image's progress
Index = (Index + 1) % _wallpaper.Images.Count; // set Index to next image's index
DateTime changeTime = SunCalcHelper.GetNextTime(_wallpaper.Images[Index].Progress, DateTime.Now, _location.Latitude, _location.Longitude);
double interval = (changeTime.Ticks - DateTime.Now.Ticks) / TimeSpan.TicksPerMillisecond;
if (interval < 1)
{
interval = 1; // fire timer immediately if it should have fired in the past
}
_timer.Interval = interval;
IsRunning = true;
NextChangeTime = changeTime;
}
// Constructor
public WallpaperScheduler(double lat, double lng)
{
// Instantiate properties and instance variables
_timer = new Timer();
_timer.AutoReset = false;
_timer.Elapsed += Timer_Elapsed;
Location = new Location(lat, lng);
// If current wallpaper's path matches that of last persisted image...
string current = DesktopManager.GetDesktopWallpaperPath();
string persisted = Properties.Settings.Default.LastSetWallpaperPath;
if (current.Equals(persisted))
{
// Set DirPath to persisted image's directory (which initializes our remaining properties and starts the scheduler running)
DirPath = Path.GetDirectoryName(persisted);
}
else
{
// Otherwise, call Stop() to set members to indicate we're not running
Stop();
}
// Subscribe to events
Application.Current.Exit += Application_Exit;
SystemEvents.TimeChanged += SystemEvents_TimeChanged;
}
