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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Text; |
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using System.Threading.Tasks; |
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namespace Apewer.WinForm |
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{ |
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/// <summary>修饰键。</summary>
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public struct ModifierKey : IEquatable<ModifierKey> |
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{ |
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byte _value; |
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bool _alt; |
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bool _ctrl; |
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bool _shift; |
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bool _win; |
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/// <summary>包含 ALT 键。</summary>
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public bool WithALT { get => _alt; } |
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/// <summary>包含 CTRL 键。</summary>
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public bool WithCTRL { get => _ctrl; } |
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/// <summary>包含 SHIFT 键。</summary>
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public bool WithSHIFT { get => _shift; } |
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/// <summary>包含 WIN 键。</summary>
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public bool WithWIN { get => _win; } |
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/// <summary>修饰键组合的值。</summary>
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public byte Value { get => _value; } |
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/// <exception cref="OverflowException"></exception>
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private ModifierKey(byte value) |
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{ |
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_alt = value << 7 >> 7 == 1; |
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_ctrl = value << 6 >> 7 == 1; |
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_shift = value << 5 >> 7 == 1; |
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_win = value << 4 >> 7 == 1; |
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_value = Convert.ToByte(value); |
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if (_value != value) throw new OverflowException($"参数【{value}】含有无效的键。"); |
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} |
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private ModifierKey(bool alt, bool ctrl, bool shift, bool win) |
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{ |
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_alt = alt; |
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_ctrl = ctrl; |
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_shift = shift; |
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_win = win; |
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var value = 0; |
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if (alt) value += 0x01; |
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if (ctrl) value += 0x02; |
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if (shift) value += 0x04; |
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if (win) value += 0x05; |
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_value = Convert.ToByte(value); |
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} |
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/// <summary></summary>
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public override int GetHashCode() => _value; |
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/// <summary></summary>
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public override bool Equals(object obj) |
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{ |
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if (obj is ModifierKey b) return _value == b._value; |
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return false; |
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} |
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/// <summary></summary>
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public bool Equals(ModifierKey another) => _value == another._value; |
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/// <summary></summary>
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public static implicit operator byte(ModifierKey instance) => instance._value; |
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/// <summary></summary>
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/// <exception cref="OverflowException"></exception>
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public static implicit operator ModifierKey(byte value) => new ModifierKey(value); |
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/// <summary></summary>
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/// <exception cref="ArgumentException" />
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public static ModifierKey operator +(ModifierKey a, ModifierKey b) |
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{ |
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if (a._alt && b._alt) throw new ArgumentException("相加的两个组合键共同包含了 ALT 键。"); |
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if (a._ctrl && b._ctrl) throw new ArgumentException("相加的两个组合键共同包含了 CTRL 键。"); |
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if (a._shift && b._shift) throw new ArgumentException("相加的两个组合键共同包含了 SHIFT 键。"); |
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if (a._win && b._win) throw new ArgumentException("相加的两个组合键共同包含了 WIN 键。"); |
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var alt = a._alt || b._alt; |
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var ctrl = a._ctrl || b._ctrl; |
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var shift = a._shift || b._shift; |
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var win = a._win || b._win; |
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return new ModifierKey(alt, ctrl, shift, win); |
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} |
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/// <summary></summary>
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public static ModifierKey operator -(ModifierKey a, ModifierKey b) |
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{ |
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var alt = a._alt; |
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var ctrl = a._ctrl; |
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var shift = a._shift; |
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var win = a._win; |
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if (b._alt) alt = false; |
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if (b._ctrl) ctrl = false; |
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if (b._shift) shift = false; |
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if (b._win) win = false; |
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return new ModifierKey(alt, ctrl, shift, win); |
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} |
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/// <summary>表示 ALT 修饰键。</summary>
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public static ModifierKey ALT { get; } = new ModifierKey(0x01); |
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/// <summary>表示 CTRL 修饰键。</summary>
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public static ModifierKey CTRL { get; } = new ModifierKey(0x02); |
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/// <summary>表示 SHIFT 修饰键。</summary>
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public static ModifierKey SHIFT { get; } = new ModifierKey(0x04); |
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/// <summary>表示 WIN 修饰键。</summary>
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public static ModifierKey WIN { get; } = new ModifierKey(0x08); |
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} |
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} |
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