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Code Issues Releases Wiki Activity

Added methods to convert between SHIL values and the system's closest pixel size

pull/180/head
dahall 2020-11-05 07:29:48 -07:00
parent a038d11d2e
commit ec1132c06d
1 changed files with 41 additions and 3 deletions
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44
Windows.Shell/ShellImageList.cs
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@ -1,5 +1,7 @@
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using Vanara.PInvoke;
using static Vanara.PInvoke.ComCtl32;
using static Vanara.PInvoke.Shell32;
@ -24,8 +26,13 @@ namespace Vanara.Windows.Shell
/// </summary>
ExtraLarge = SHIL.SHIL_EXTRALARGE,
/// <summary>
/// These images are the size specified by GetSystemMetrics called with SM_CXSMICON and GetSystemMetrics called with SM_CYSMICON.
/// </summary>
SystemSmall = SHIL.SHIL_SYSSMALL,
/// <summary>Windows Vista and later. The image is normally 256x256 pixels.</summary>
Jumbo = SHIL.SHIL_JUMBO
Jumbo = SHIL.SHIL_JUMBO,
}
/* *****************************
@ -34,8 +41,23 @@ namespace Vanara.Windows.Shell
/// <summary>Represents the System Image List holding images for all shell icons.</summary>
public static class ShellImageList
{
private const string REGSTR_PATH_METRICS = "Control Panel\\Desktop\\WindowMetrics";
private static readonly Dictionary<ShellImageSize, ushort> g_rgshil;
private static readonly int SHIL_COUNT;
private static HIMAGELIST hSystemImageList;
static ShellImageList()
{
SHIL_COUNT = Enum.GetValues(typeof(ShellImageSize)).Length;
g_rgshil = new Dictionary<ShellImageSize, ushort>(SHIL_COUNT); // new ushort[SHIL_COUNT];
var sysCxIco = GetSystemMetrics(SystemMetric.SM_CXICON);
g_rgshil[ShellImageSize.Large] = (ushort)(int)Microsoft.Win32.Registry.CurrentUser.GetValue($"{REGSTR_PATH_METRICS}\\Shell Icon Size", sysCxIco);
g_rgshil[ShellImageSize.Small] = (ushort)(int)Microsoft.Win32.Registry.CurrentUser.GetValue($"{REGSTR_PATH_METRICS}\\Shell Small Icon Size", sysCxIco / 2);
g_rgshil[ShellImageSize.ExtraLarge] = (ushort)(3 * sysCxIco / 2);
g_rgshil[ShellImageSize.SystemSmall] = (ushort)GetSystemMetrics(SystemMetric.SM_CXSMICON);
g_rgshil[ShellImageSize.Jumbo] = 256;
}
/// <summary>Gets the Shell icon for the given file name or extension.</summary>
/// <param name="fileNameOrExtension">The file name or extension .</param>
/// <param name="iconType">
@ -71,10 +93,26 @@ namespace Vanara.Windows.Shell
/// <param name="index">The index of the system icon to retrieve.</param>
/// <param name="iconSize">Size of the icon.</param>
/// <returns>An <see cref="Icon"/> instance if found; otherwise <see langword="null"/>.</returns>
public static Icon GetSystemIcon(int index, ShellImageSize iconSize = ShellImageSize.Large)
public static Icon GetSystemIcon(int index, ShellImageSize iconSize = ShellImageSize.Large) => GetSystemIconHandle(index, iconSize)?.ToIcon();
/// <summary>Gets the system icon for and index and size.</summary>
/// <param name="index">The index of the system icon to retrieve.</param>
/// <param name="iconSize">Size of the icon.</param>
/// <returns>An <see cref="Icon"/> instance if found; otherwise <see langword="null"/>.</returns>
public static SafeHICON GetSystemIconHandle(int index, ShellImageSize iconSize = ShellImageSize.Large)
{
SHGetImageList((SHIL)iconSize, typeof(IImageList).GUID, out var il).ThrowIfFailed();
return il.GetIcon(index, IMAGELISTDRAWFLAGS.ILD_TRANSPARENT)?.ToIcon();
return il.GetIcon(index, IMAGELISTDRAWFLAGS.ILD_TRANSPARENT);
}
/// <summary>Given a pixel size, return the ShellImageSize value with the closest size.</summary>
/// <param name="pixels">Size, in pixels, of the image list size to search for.</param>
/// <returns>An image list size.</returns>
public static ShellImageSize PixelsToSHIL(int pixels) => g_rgshil.Aggregate((x, y) => Math.Abs(x.Value - pixels) < Math.Abs(y.Value - pixels) ? x : y).Key;
/// <summary>Given an image list size, return the related size, in pixels, of that size defined on the system.</summary>
/// <param name="imageListSize">Size of the image list.</param>
/// <returns>Pixel size of corresponding system value.</returns>
public static int SHILtoPixels(ShellImageSize imageListSize) => g_rgshil[imageListSize];
}
}