/// <summary>
/// This method will capture the current Cursor by using User32 Code
/// </summary>
/// <returns>A IElement with the Mouse Cursor as Image in it.</returns>
public static bool TryGetCurrentCursor(out BitmapSource bitmapSource, out NativePoint location)
{
bitmapSource = null;
location = NativePoint.Empty;
var cursorInfo = CursorInfo.Create();
if (!NativeCursorMethods.GetCursorInfo(ref cursorInfo))
{
return(false);
}
if (cursorInfo.Flags != CursorInfoFlags.Showing)
{
return(false);
}
using (var safeIcon = NativeIconMethods.CopyIcon(cursorInfo.CursorHandle))
{
if (!NativeIconMethods.GetIconInfo(safeIcon, out var iconInfo))
{
return(false);
}
using (iconInfo.BitmaskBitmapHandle)
using (iconInfo.ColorBitmapHandle)
{
var cursorLocation = User32Api.GetCursorLocation();
bitmapSource = Imaging.CreateBitmapSourceFromHIcon(safeIcon.DangerousGetHandle(), Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
location = new NativePoint(cursorLocation.X - iconInfo.Hotspot.X, cursorLocation.Y - iconInfo.Hotspot.Y);
}
}
return(true);
}
/// <summary>
/// Returns an icon for a given file extension - indicated by the name parameter.
/// See: http://msdn.microsoft.com/en-us/library/windows/desktop/bb762179(v=vs.85).aspx
/// </summary>
/// <param name="filename">Filename</param>
/// <param name="size">Large or small</param>
/// <param name="linkOverlay">Whether to include the link icon</param>
/// <returns>System.Drawing.Icon</returns>
public static TIcon GetFileExtensionIcon <TIcon>(string filename, IconSize size, bool linkOverlay) where TIcon : class
{
var shfi = new ShellFileInfo();
// UseFileAttributes makes it simulate, just gets the icon for the extension
var flags = ShellGetFileInfoFlags.Icon | ShellGetFileInfoFlags.UseFileAttributes;
if (linkOverlay)
{
flags |= ShellGetFileInfoFlags.LinkOverlay;
}
// Check the size specified for return.
if (IconSize.Small == size)
{
flags |= ShellGetFileInfoFlags.SmallIcon;
}
else
{
flags |= ShellGetFileInfoFlags.LargeIcon;
}
SHGetFileInfo(Path.GetFileName(filename), FILE_ATTRIBUTE_NORMAL, ref shfi, (uint)Marshal.SizeOf(shfi), flags);
// TODO: Fix bad practise for cleanup, and use generics to allow the user to specify if it's an icon/bitmap/-source
// Copy (clone) the returned icon to a new object, thus allowing us to clean-up properly
try
{
return(IconHelper.IconHandleTo <TIcon>(shfi.IconHandle));
}
finally
{
if (shfi.IconHandle != IntPtr.Zero)
{
// Cleanup
NativeIconMethods.DestroyIcon(shfi.IconHandle);
}
}
}
/// <summary>
/// Used to access system folder icons.
/// </summary>
/// <param name="size">Specify large or small icons.</param>
/// <param name="folderType">Specify open or closed FolderType.</param>
/// <returns>System.Drawing.Icon</returns>
public static TIcon GetFolderIcon <TIcon>(IconSize size, FolderType folderType) where TIcon : class
{
// Need to add size check, although errors generated at present!
var flags = ShellGetFileInfoFlags.Icon | ShellGetFileInfoFlags.UseFileAttributes;
if (FolderType.Open == folderType)
{
flags |= ShellGetFileInfoFlags.OpenIcon;
}
if (IconSize.Small == size)
{
flags |= ShellGetFileInfoFlags.SmallIcon;
}
else
{
flags |= ShellGetFileInfoFlags.LargeIcon;
}
// Get the folder icon
var shellFileInfo = new ShellFileInfo();
SHGetFileInfo(null, FILE_ATTRIBUTE_DIRECTORY, ref shellFileInfo, (uint)Marshal.SizeOf(shellFileInfo), flags);
// Now clone the icon, so that it can be successfully stored in an ImageList
try
{
return(IconHelper.IconHandleTo <TIcon>(shellFileInfo.IconHandle));
}
finally
{
if (shellFileInfo.IconHandle != IntPtr.Zero)
{
// Cleanup
NativeIconMethods.DestroyIcon(shellFileInfo.IconHandle);
}
}
}
