using System;
using System.Drawing;
using Vanara.PInvoke;
using static Vanara.PInvoke.ComCtl32;
using static Vanara.PInvoke.Shell32;
using static Vanara.PInvoke.User32_Gdi;
namespace Vanara.Windows.Shell
{
/// Used to determine the size of the icon returned by .
public enum ShellImageSize
{
///
/// The image size is normally 32x32 pixels. However, if the Use large icons option is selected from the Effects section of the Appearance tab in
/// Display Properties, the image is 48x48 pixels.
///
Large = SHIL.SHIL_LARGE,
/// The image is the Shell standard small icon size of 16x16, but the size can be customized by the user.
Small = SHIL.SHIL_SMALL,
/// The image is the Shell standard extra-large icon size. This is typically 48x48, but the size can be customized by the user.
ExtraLarge = SHIL.SHIL_EXTRALARGE,
/// Windows Vista and later. The image is normally 256x256 pixels.
Jumbo = SHIL.SHIL_JUMBO
}
/* *****************************
* Developer Note: Keep these methods synchronized with identical methods in Vanara.Windows.Forms::Vanara.Extensions.IconExtension
* ***************************** */
/// Represents the System Image List holding images for all shell icons.
public static class ShellImageList
{
/// Gets the system icon for the given file name or extension.
/// The file name or extension.
/// Size of the icon.
/// An instance if found; otherwise .
public static Icon GetSystemIcon(string fileNameOrExtension, ShellImageSize iconSize = ShellImageSize.Large)
{
var shfi = new SHFILEINFO();
var hImageList = (HIMAGELIST)SHGetFileInfo(fileNameOrExtension, 0, ref shfi, SHFILEINFO.Size, SHGFI.SHGFI_SYSICONINDEX | (iconSize == ShellImageSize.Small ? SHGFI.SHGFI_SMALLICON : 0));
if (hImageList.IsNull) return null;
if (iconSize <= ShellImageSize.Small)
return ImageList_GetIcon(hImageList, shfi.iIcon, IMAGELISTDRAWFLAGS.ILD_TRANSPARENT).ToIcon();
SHGetImageList((SHIL)iconSize, typeof(IImageList).GUID, out var il).ThrowIfFailed();
return il.GetIcon(shfi.iIcon, IMAGELISTDRAWFLAGS.ILD_TRANSPARENT).ToIcon();
}
/// Gets the Shell icon for the given file name or extension.
/// The file name or extension .
/// Flags to specify the type of the icon to retrieve. This uses the method and can only retrieve small or large icons.
/// An instance if found; otherwise .
public static Icon GetFileIcon(string fileNameOrExtension, ShellIconType iconType = ShellIconType.Large)
{
var shfi = new SHFILEINFO();
var ret = SHGetFileInfo(fileNameOrExtension, 0, ref shfi, SHFILEINFO.Size, SHGFI.SHGFI_USEFILEATTRIBUTES | SHGFI.SHGFI_ICON | (SHGFI)iconType);
if (ret == IntPtr.Zero)
ret = SHGetFileInfo(fileNameOrExtension, 0, ref shfi, SHFILEINFO.Size, SHGFI.SHGFI_ICON | (SHGFI)iconType);
return ret == IntPtr.Zero ? null : shfi.hIcon.ToIcon();
}
}
}