static void RevertWallpaper()
{
// EndDate is over so reset
WindowsWallpaper.SetWallpaper(State.OriginalWallpaperPath);
WindowsWallpaper.SetWallpaperStyle(State.OriginalWallpaperStyle);
WindowsWallpaper.SetTileWallpaperValue(State.OriginalWallpaperTileValue);
State.ImagesUsed.Clear();
State.DaysElapsed = 0;
}
public void OverlaySmallerImage(ImageObject overlay) // Overlay a smaller image on top of this one (or if not smaller then resize)
{
Image overlayImageData = overlay.GetImage();
// Make sure overlay image is smaller than base image- resize if necessary
int overlayWidth = overlayImageData.Width;
int overlayHeight = overlayImageData.Height;
int taskbarOffsetX = 0;
int taskbarOffsetY = 0;
string taskbarPos = WindowsWallpaper.GetTaskbarPosition();
if (!WindowsWallpaper.TaskbarIsHidden())
{
if (taskbarPos == "Left" || taskbarPos == "Right")
{
// Taskbar uses space on x axis
taskbarOffsetX = WindowsWallpaper.GetTaskbarHeight();
}
else
{
// Taskbar uses space on y axis
taskbarOffsetY = WindowsWallpaper.GetTaskbarHeight();
}
}
// If overlay is bigger in either dimension then shrink by 10% until it is smaller
while (image.Width - taskbarOffsetX < overlayWidth || image.Height - taskbarOffsetY < overlayHeight)
{
overlayWidth = (int)(overlayWidth * 0.9);
overlayHeight = (int)(overlayHeight * 0.9);
}
// Calculate coordinates such that overlay image is vertically at bottom of base image and horizontally centred
int xValue = (image.Width / 2) - (overlayWidth / 2);
int yValue = (image.Height - overlayHeight);
if (taskbarPos == "Right" || taskbarPos == "Bottom")
{
// Need to subtract offset
taskbarOffsetX *= -1;
taskbarOffsetY *= -1;
}
xValue += taskbarOffsetX;
yValue += taskbarOffsetY;
using (Graphics g = Graphics.FromImage(image))
{
// Must use rectange overload instead of point or overlay image may be resized
g.DrawImage(overlayImageData, new Rectangle(xValue, yValue, overlayWidth, overlayHeight));
}
}
static void UpdateWallpaper()
{
try
{
if (!(State.ImagesUsed.Count < State.Images.Count))
{
// If there are not enough images and all have been used, then do nothing
return;
}
// Choose a random image to overlay (or use base image for first day)
string image;
if (State.DaysElapsed == 0)
{
// The first day
image = State.BaseImage;
// Save location and style settings for current desktop image
State.OriginalWallpaperPath = WindowsWallpaper.GetWallpaperPath();
State.OriginalWallpaperStyle = WindowsWallpaper.GetWallpaperStyle();
State.OriginalWallpaperTileValue = WindowsWallpaper.GetTileWallpaperValue();
// Save overlay
string imagePath;
State.Images.TryGetValue(image, out imagePath);
ImageObject overlayImage = new ImageObject(imagePath);
overlayImage.SaveImage(OverlayPath);
State.ImagesUsed.Add(image);
}
else
{
image = RandomImage();
string imagePath;
State.Images.TryGetValue(image, out imagePath);
// Overlay image on top of existing overlay
ImageObject overlayImage = new ImageObject(OverlayPath);
ImageObject newImage = new ImageObject(imagePath);
overlayImage.OverlayEqualImage(newImage);
overlayImage.SaveImage(OverlayPath);
State.ImagesUsed.Add(image);
}
// Overlay on desktop
ImageObject wallpaper = WindowsWallpaper.GetWallpaper();
ImageObject overlay = new ImageObject(OverlayPath);
wallpaper.OverlaySmallerImage(overlay);
wallpaper.SaveImage(ModifiedWallpaperPath);
WindowsWallpaper.SetWallpaper(Path.GetFullPath(ModifiedWallpaperPath));
State.DaysElapsed++;
}
catch (UnauthorizedAccessException)
{
MessageBox.Show("Unable to modify images, as program is unauthorised to access one of them", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
// Exit program with error code 5 (Access denied)
Environment.Exit(5);
}
}
