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Accelerator.cs
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Accelerator.cs
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/*
* @Author: Cory Travis
* @Modified: 1/24/2012
*/
using System;
using System.Collections.Generic;
using System.Text;
using Extensions;
using Keys.InterOp;
namespace Keys {
/// <summary>
/// Represents a keystroke such as Ctrl + F or Ctrl + Alt + Space.
/// </summary>
public sealed class Accelerator {
private const byte VIRTKEY = 0x01;
private const string SEPARATOR = " + ";
private static readonly Dictionary<AcceleratorKeys, string> acceleratorKeys = new Dictionary<AcceleratorKeys, string>();
private static readonly Dictionary<VirtualKeys, string> virtualKeys = new Dictionary<VirtualKeys, string>();
private static readonly StringBuilder stringBuilder = new StringBuilder();
private static readonly object builderLock = new object();
private readonly string str;
internal readonly ACCEL Accel;
internal readonly ushort Command;
public readonly AcceleratorKeys AcceleratorKey;
public readonly VirtualKeys VirtualKey;
public event EventHandler Handler;
static Accelerator() {
foreach(var acceleratorKey in Enum.GetValues(typeof(AcceleratorKeys))) {
acceleratorKeys.Add((AcceleratorKeys)acceleratorKey, acceleratorKey.ToString());
}
foreach(var virtualKey in Enum.GetValues(typeof(VirtualKeys))) {
virtualKeys.Add((VirtualKeys)virtualKey, virtualKey.ToString());
}
}
/// <summary>
/// Create a new accelerator from the given accelerator key and virtual key combination.
/// </summary>
/// <param name="acceleratorKey">
/// The accelerator key (Ctrl, Alt, or Shift). Can be combined with | to form more complicated keystrokes
/// such as Ctrl + Alt + Space.
/// </param>
/// <param name="virtualKey">
/// The virtual key code (may not be Ctrl, Alt, or Shift).
/// </param>
public Accelerator(AcceleratorKeys acceleratorKey, VirtualKeys virtualKey) {
AcceleratorKey = acceleratorKey;
VirtualKey = virtualKey;
Command = Macros.MAKEWORD((byte)AcceleratorKey, (byte)VirtualKey);
lock(builderLock) {
//create a string representation of this accelerators keystroke such as "CONTROL + SPACE"
foreach(var key in acceleratorKeys.Keys) {
if(AcceleratorKey.Any(key)) {
stringBuilder.Append(acceleratorKeys[key])
.Append(SEPARATOR);
}
}
stringBuilder.Append(virtualKeys[VirtualKey]);
str = stringBuilder.ToString();
stringBuilder.Clear();
}
Accel = new ACCEL() {
fVirt = (byte)(AcceleratorKey | (AcceleratorKeys)VIRTKEY),
key = (ushort)VirtualKey,
cmd = Command
};
}
public override string ToString() {
return str;
}
/// <summary>
/// Called by a hook procedure when the relevant keystroke is detected.
/// </summary>
internal void Accelerate() {
Handler.Raise(this);
}
}
}