mirror of
https://github.com/Hofknecht/SystemTrayMenu.git
synced 2024-09-12 15:39:16 +12:00
288 lines
No EOL
10 KiB
C#
288 lines
No EOL
10 KiB
C#
using Clearcove.Logging;
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using System;
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using System.Drawing;
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using System.Runtime.InteropServices;
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namespace SystemTrayMenu.Helper
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{
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// from https://www.codeproject.com/Articles/2532/Obtaining-and-managing-file-and-folder-icons-using
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// added ImageList_GetIcon
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/// <summary>
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/// Provides static methods to read system icons for both folders and files.
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/// </summary>
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/// <example>
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/// <code>IconReader.GetFileIcon("c:\\general.xls");</code>
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/// </example>
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public class IconReader
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{
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/// <summary>
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/// Options to specify the size of icons to return.
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/// </summary>
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public enum IconSize
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{
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/// <summary>
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/// Specify large icon - 32 pixels by 32 pixels.
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/// </summary>
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Large = 0,
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/// <summary>
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/// Specify small icon - 16 pixels by 16 pixels.
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/// </summary>
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Small = 1
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}
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/// <summary>
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/// Options to specify whether folders should be in the open or closed state.
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/// </summary>
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public enum FolderType
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{
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/// <summary>
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/// Specify open folder.
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/// </summary>
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Open = 0,
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/// <summary>
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/// Specify closed folder.
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/// </summary>
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Closed = 1
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}
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/// <summary>
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/// Returns an icon for a given file - indicated by the name parameter.
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/// </summary>
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/// <returns>System.Drawing.Icon</returns>
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public static Icon GetFileIcon(string filePath, bool linkOverlay,
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IconSize size = IconSize.Small)
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{
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Icon icon = null;
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Shell32.SHFILEINFO shfi = new Shell32.SHFILEINFO();
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uint flags = Shell32.SHGFI_ICON | Shell32.SHGFI_SYSICONINDEX;
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//MH: Removed, otherwise wrong icon
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// | Shell32.SHGFI_USEFILEATTRIBUTES ;
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if (true == linkOverlay) flags += Shell32.SHGFI_LINKOVERLAY;
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/* Check the size specified for return. */
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if (IconSize.Small == size)
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{
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flags += Shell32.SHGFI_SMALLICON;
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}
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else
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{
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flags += Shell32.SHGFI_LARGEICON;
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}
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IntPtr hImageList = Shell32.SHGetFileInfo(filePath,
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Shell32.FILE_ATTRIBUTE_NORMAL,
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ref shfi,
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(uint)System.Runtime.InteropServices.Marshal.SizeOf(shfi),
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flags);
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if (hImageList != IntPtr.Zero) // got valid handle?
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{
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IntPtr hIcon;
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if (linkOverlay)
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hIcon = shfi.hIcon; // Get icon directly
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else
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hIcon = Shell32.ImageList_GetIcon(hImageList, shfi.iIcon, Shell32.ILD_TRANSPARENT); // Get icon from .ink without overlay
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try
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{
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// Copy (clone) the returned icon to a new object, thus allowing us to clean-up properly
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icon = (Icon)Icon.FromHandle(hIcon).Clone();
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}
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catch (Exception ex)
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{
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Logger log = new Logger(nameof(IconReader));
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log.Info($"filePath:'{filePath}'");
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log.Error($"{ex.ToString()}");
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}
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// Cleanup
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if (!linkOverlay) User32.DestroyIcon(hIcon);
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User32.DestroyIcon(shfi.hIcon);
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}
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return icon;
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}
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public static Icon GetFolderIcon(string directoryPath,
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FolderType folderType, bool linkOverlay,
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IconSize size = IconSize.Small)
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{
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Icon icon = null;
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// Need to add size check, although errors generated at present!
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//uint flags = Shell32.SHGFI_ICON | Shell32.SHGFI_USEFILEATTRIBUTES;
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//MH: Removed SHGFI_USEFILEATTRIBUTES, otherwise was wrong folder icon
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uint flags = Shell32.SHGFI_ICON; // | Shell32.SHGFI_USEFILEATTRIBUTES;
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if (true == linkOverlay) flags += Shell32.SHGFI_LINKOVERLAY;
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if (FolderType.Open == folderType)
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{
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flags += Shell32.SHGFI_OPENICON;
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}
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if (IconSize.Small == size)
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{
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flags += Shell32.SHGFI_SMALLICON;
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}
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else
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{
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flags += Shell32.SHGFI_LARGEICON;
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}
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// Get the folder icon
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Shell32.SHFILEINFO shfi = new Shell32.SHFILEINFO();
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IntPtr Success = Shell32.SHGetFileInfo(directoryPath,
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Shell32.FILE_ATTRIBUTE_DIRECTORY,
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ref shfi,
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(uint)Marshal.SizeOf(shfi),
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flags);
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if (Success != IntPtr.Zero) // got valid handle?
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{
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try
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{
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Icon.FromHandle(shfi.hIcon); // Load the icon from an HICON handle
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// Now clone the icon, so that it can be successfully stored in an ImageList
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icon = (Icon)Icon.FromHandle(shfi.hIcon).Clone();
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}
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catch (Exception ex)
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{
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Logger log = new Logger(nameof(IconReader));
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log.Info($"directoryPath:'{directoryPath}'");
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log.Error($"{ex.ToString()}");
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}
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// Cleanup
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User32.DestroyIcon(shfi.hIcon);
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}
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return icon;
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}
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}
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/// <summary>
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/// Wraps necessary Shell32.dll structures and functions required to retrieve Icon Handles using SHGetFileInfo. Code
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/// courtesy of MSDN Cold Rooster Consulting case study.
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/// </summary>
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///
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// This code has been left largely untouched from that in the CRC example. The main changes have been moving
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// the icon reading code over to the IconReader type.
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public class Shell32
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{
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public const int MAX_PATH = 256;
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[StructLayout(LayoutKind.Sequential)]
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public struct SHITEMID
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{
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public ushort cb;
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[MarshalAs(UnmanagedType.LPArray)]
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public byte[] abID;
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct ITEMIDLIST
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{
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public SHITEMID mkid;
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct BROWSEINFO
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{
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public IntPtr hwndOwner;
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public IntPtr pidlRoot;
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public IntPtr pszDisplayName;
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[MarshalAs(UnmanagedType.LPTStr)]
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public string lpszTitle;
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public uint ulFlags;
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public IntPtr lpfn;
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public int lParam;
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public IntPtr iImage;
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}
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// Browsing for directory.
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public const uint BIF_RETURNONLYFSDIRS = 0x0001;
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public const uint BIF_DONTGOBELOWDOMAIN = 0x0002;
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public const uint BIF_STATUSTEXT = 0x0004;
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public const uint BIF_RETURNFSANCESTORS = 0x0008;
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public const uint BIF_EDITBOX = 0x0010;
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public const uint BIF_VALIDATE = 0x0020;
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public const uint BIF_NEWDIALOGSTYLE = 0x0040;
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public const uint BIF_USENEWUI = (BIF_NEWDIALOGSTYLE | BIF_EDITBOX);
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public const uint BIF_BROWSEINCLUDEURLS = 0x0080;
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public const uint BIF_BROWSEFORCOMPUTER = 0x1000;
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public const uint BIF_BROWSEFORPRINTER = 0x2000;
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public const uint BIF_BROWSEINCLUDEFILES = 0x4000;
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public const uint BIF_SHAREABLE = 0x8000;
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[StructLayout(LayoutKind.Sequential)]
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public struct SHFILEINFO
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{
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public const int NAMESIZE = 80;
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public IntPtr hIcon;
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public int iIcon;
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public uint dwAttributes;
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[MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAX_PATH)]
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public string szDisplayName;
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[MarshalAs(UnmanagedType.ByValTStr, SizeConst = NAMESIZE)]
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public string szTypeName;
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};
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public const uint SHGFI_ICON = 0x000000100; // get icon
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public const uint SHGFI_DISPLAYNAME = 0x000000200; // get display name
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public const uint SHGFI_TYPENAME = 0x000000400; // get type name
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public const uint SHGFI_ATTRIBUTES = 0x000000800; // get attributes
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public const uint SHGFI_ICONLOCATION = 0x000001000; // get icon location
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public const uint SHGFI_EXETYPE = 0x000002000; // return exe type
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public const uint SHGFI_SYSICONINDEX = 0x000004000; // get system icon index
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public const uint SHGFI_LINKOVERLAY = 0x000008000; // put a link overlay on icon
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public const uint SHGFI_SELECTED = 0x000010000; // show icon in selected state
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public const uint SHGFI_ATTR_SPECIFIED = 0x000020000; // get only specified attributes
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public const uint SHGFI_LARGEICON = 0x000000000; // get large icon
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public const uint SHGFI_SMALLICON = 0x000000001; // get small icon
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public const uint SHGFI_OPENICON = 0x000000002; // get open icon
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public const uint SHGFI_SHELLICONSIZE = 0x000000004; // get shell size icon
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public const uint SHGFI_PIDL = 0x000000008; // pszPath is a pidl
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public const uint SHGFI_USEFILEATTRIBUTES = 0x000000010; // use passed dwFileAttribute
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public const uint SHGFI_ADDOVERLAYS = 0x000000020; // apply the appropriate overlays
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public const uint SHGFI_OVERLAYINDEX = 0x000000040; // Get the index of the overlay
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public const uint FILE_ATTRIBUTE_DIRECTORY = 0x00000010;
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public const uint FILE_ATTRIBUTE_NORMAL = 0x00000080;
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public const int ILD_TRANSPARENT = 0x00000001;
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[DllImport("Shell32.dll", CharSet = CharSet.Unicode)]
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public static extern IntPtr SHGetFileInfo(
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string pszPath,
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uint dwFileAttributes,
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ref SHFILEINFO psfi,
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uint cbFileInfo,
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uint uFlags
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);
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[DllImport("comctl32")]
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internal static extern IntPtr ImageList_GetIcon(
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IntPtr himl,
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int i,
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int flags);
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}
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/// <summary>
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/// Wraps necessary functions imported from User32.dll. Code courtesy of MSDN Cold Rooster Consulting example.
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/// </summary>
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public class User32
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{
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/// <summary>
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/// Provides access to function required to delete handle. This method is used internally
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/// and is not required to be called separately.
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/// </summary>
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/// <param name="hIcon">Pointer to icon handle.</param>
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/// <returns>N/A</returns>
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[DllImport("User32.dll")]
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public static extern int DestroyIcon(IntPtr hIcon);
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}
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} |