public static void NextBackground()
{
int index;
int interval;
string path;
// Read registry values
using (var key = Registry.CurrentUser.OpenSubKey(@"Control Panel\Desktop", true))
{
index = (int)key.GetValue("WWU CurrentIndex", -1);
interval = (int)key.GetValue("WWU CurrentInterval", 0);
path = (string)key.GetValue("WWU CurrentDir", null);
}
if (path == null || interval == 0)
{
throw new Exception("No slideshow currently in progress");
}
// Get the current images in the given directory
string[] images = GetBackgroundsInFolder(path);
// Wrap index
if (++index >= images.Length)
{
index = 0;
}
// Set blank if no images in folder
if (images.Length == 0)
{
WallpaperInterop.SetWallpaper("", PicturePosition.Center, false);
}
// Otherwise set background to the next image
else
{
var pos = WallpaperInterop.GetWallpaperPosition();
WallpaperInterop.SetWallpaper(images[index], pos, false);
}
// Save registry values
using (var key = Registry.CurrentUser.OpenSubKey(@"Control Panel\Desktop", true))
{
key.SetValue("WWU CurrentIndex", index);
key.SetValue("WWU CurrentInterval", interval);
key.SetValue("WWU CurrentDir", path);
}
}
static void Main(string[] args)
{
try
{
// Output current wallpaper details
if (args.Length == 0)
{
Console.WriteLine("Current Wallpaper ");
Console.WriteLine("\t Filepath: \"{0}\"", WallpaperInterop.GetWallpaperFilepath());
Console.WriteLine("\t Position: {0}", WallpaperInterop.GetWallpaperPosition());
Console.WriteLine("Current login background ");
Console.WriteLine("\t Filepath: \"{0}\"", WallpaperInterop.GetLoginBGFilepath());
}
// Output usage info
else if (args.Contains("/?"))
{
Program.printUsage();
}
// Handle just next background
else if (args[0] == "/next")
{
SlideshowHelper.NextBackground();
}
// Handle just endshow
else if (args[0] == "/endshow")
{
SlideshowHelper.CancelSlideshow();
}
else if (args[0] == "/login")
{
if (args.Length == 1)
{
Program.errorOut("Expected path for option '/login'");
}
WallpaperInterop.SetLoginBG(args[1]);
}
// Perform wallpaper change
else
{
string path = args[0];
var opts = new ProgramOptions(args);
// End show as requested
if (opts.EndShow)
{
SlideshowHelper.CancelSlideshow();
}
if (opts.Slideshow)
{
// Begin slideshow
SlideshowHelper.BeginSlideshow(path, opts.Position,
opts.ShowInterval, opts.ShowIndex);
}
else
{
// Get random image if selecting from directory
if (opts.Directory)
{
string[] walls = SlideshowHelper.GetBackgroundsInFolder(path);
path = walls[new Random().Next(0, walls.Length)];
}
// Call interop code
WallpaperInterop.SetWallpaper(path, opts.Position, opts.Copy);
}
}
}
catch (Exception e) {
errorOut(e.Message);
}
}
/// <summary>
/// Begins a new slideshow, cancelling any active ones and setting the initial
/// background.
/// </summary>
/// <param name="path">The path to the background directory.</param>
/// <param name="position">The position with which the background will be displayed.</param>
/// <param name="interval">The interval before which the next background will be set.</param>
/// <param name="index">The file index within the directory at which to begin.</param>
public static void BeginSlideshow(string path, PicturePosition position,
int interval, int index)
{
if (interval < 0)
{
throw new ArgumentOutOfRangeException("showInterval");
}
if (index < 0)
{
throw new ArgumentOutOfRangeException("showIndex");
}
// Get the absolute path to the directory
path = Path.GetFullPath(path);
// Get the current images in the given directory
string[] images = GetBackgroundsInFolder(path);
// Wrap index
if (index >= images.Length)
{
index = 0;
}
// Clamp interval
interval = Math.Min(interval, 44640);
// Save registry values
using (var key = Registry.CurrentUser.OpenSubKey(@"Control Panel\Desktop", true))
{
key.SetValue("WWU CurrentIndex", index);
key.SetValue("WWU CurrentInterval", interval);
key.SetValue("WWU CurrentDir", path);
}
// Remove any current slideshows
CancelSlideshow();
// Schedule slideshow
using (TaskService service = new TaskService())
{
// Create new task
TaskDefinition task = service.NewTask();
// Create time trigger
var trigger = new TimeTrigger();
trigger.SetRepetition(TimeSpan.FromMinutes(interval), TimeSpan.Zero);
task.Triggers.Add(trigger);
task.Settings.StartWhenAvailable = true;
task.Settings.WakeToRun = false;
// Add re-execution to set next background
task.Actions.Add(new ExecAction(GetWallpaperwExe() + " /next"));
// Register task
service.RootFolder.RegisterTaskDefinition("wwu_slideshow", task);
}
// Now actually set the first wallpaper
// Set blank if no images in folder
if (images.Length == 0)
{
WallpaperInterop.SetWallpaper("", PicturePosition.Center, false);
}
// Otherwise set background to the next image
else
{
WallpaperInterop.SetWallpaper(images[index], position, false);
}
}
