当前位置：首页 > news >正文

关于按键映射软件的探索（其一）

news 来源：原创 2025/4/25 5:56:38

那么先说结论——重构了一次，我还是失败了，失败于拓展调整个性化的设计，不过我还是实现了按键监测然后显示的功能。只不过是说我对于WPF软件等的封装和软窗口的功能还是不怎么熟悉。

引言

在许多游戏玩家中，高难度操作（高APM）复现始终是技术提升的核心，而在各类剪辑、特效、建模软件教学视频中，“快捷键教学”也逐渐成为主流。为此，我希望实现一个全局按键监听器，能以视觉化方式实时展示当前操作，辅助观众更好地理解、复现操作步骤。

按键检测读取，注意不是按键精灵，前者多半是为了教学中的复现，自证，亦或是实现某种真实在进行的直播动作直播效果。而后者我的理解是一种按键宏，也就是传统意义上的外挂。我们观看游戏直播时，很多主播会使用到，教学视频方面，我观察到的更多是belender软件的教学和使用。毕竟学会更多的快捷键，就可以大大提高生产效率。但是我的目光聚焦在这个按键映射软件本身，于是我进行了开发，与大G老师深入交流。

🛠️ 项目目标

1.实现全局键盘与鼠标监听。

2.监听操作后在屏幕左下角浮现按键组合。

3.拓展配置：控制显示位置、字体缩放、最大数量等个性化设置。（失败啦！）

开发（C#）（第一次）

通过第三方库 Gma.System.MouseKeyHook 监听全局按键，然后把每次捕获到的按键以文字的形式展示在屏幕右下角，用 WPF 搭配 StackPanel + Border + TextBlock 动态生成显示框。

直接用按键转换包，按下那个按键就可以自动从码值转换成按键对应的文本。

        Title="KeyCaster"Height="450"Width="800"WindowStyle="None"AllowsTransparency="True"Background="Transparent"

最后用窗体大小和生成位置调整最后我们需要显示提示的位置，这个窗体透明就可以。

然后奉上按键映射监测的核心代码：

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Threading;
using Gma.System.MouseKeyHook;namespace WpfApp1
{public partial class MainWindow : Window{#region 字段定义private IKeyboardMouseEvents _globalHook;private readonly List<string> _keyList = new();private DateTime _lastInputTime = DateTime.MinValue;private Border _activeBlock = null;private DispatcherTimer _groupTimer;private double _scaleFactor = 1.0;private Thickness _screenOffset = new Thickness(0, 0, 20, 20);#endregion#region 构造函数与初始化public MainWindow(){InitializeComponent();Console.WriteLine("MainWindow 构造函数执行");StartGlobalHook();var settings = SettingsManager.Load();_scaleFactor = settings.Scale;_screenOffset = new Thickness(settings.OffsetX, settings.OffsetY, 20, 20);}private void StartGlobalHook(){Console.WriteLine("尝试注册键鼠监听");_globalHook = Hook.GlobalEvents();_globalHook.KeyDown += OnInputEvent;_globalHook.MouseDown += OnInputEvent;Console.WriteLine("全局钩子已启动");}#endregion#region 输入处理private void OnInputEvent(object sender, EventArgs e){Console.WriteLine($"捕获事件：{e}");var now = DateTime.Now;string inputStr = e switch{System.Windows.Forms.KeyEventArgs keyEvent => keyEvent.KeyCode.ToString(),System.Windows.Forms.MouseEventArgs mouseEvent => mouseEvent.Button switch{System.Windows.Forms.MouseButtons.Left => "MouseLeft",System.Windows.Forms.MouseButtons.Right => "MouseRight",System.Windows.Forms.MouseButtons.Middle => "MouseMiddle",_ => mouseEvent.Button.ToString()},_ => string.Empty};if (string.IsNullOrEmpty(inputStr))return;double interval = (now - _lastInputTime).TotalSeconds;_lastInputTime = now;if (interval <= 0.5 && _activeBlock != null){_keyList.Add(inputStr);string formatted = FormatKeyList(_keyList);UpdateActiveDisplay(formatted);ResetGroupTimer();}else{if (_activeBlock != null){StartFadeOut(_activeBlock);_activeBlock = null;}_keyList.Clear();_keyList.Add(inputStr);string formatted = FormatKeyList(_keyList);ShowNewDisplay(formatted);ResetGroupTimer();}}private string FormatKeyList(List<string> keys){var sb = new StringBuilder();for (int i = 0; i < keys.Count; i++){string current = keys[i];bool currentIsLetter = current.Length == 1 && current[0] >= 'A' && current[0] <= 'Z';if (i > 0){string previous = keys[i - 1];bool previousIsLetter = previous.Length == 1 && previous[0] >= 'A' && previous[0] <= 'Z';if (!(previousIsLetter && currentIsLetter)){sb.Append(" + ");}}sb.Append(current);}return sb.ToString();}#endregion#region UI 显示与更新private void ShowNewDisplay(string text){_activeBlock = new Border{Background = System.Windows.Media.Brushes.Black,Opacity = 0.8,CornerRadius = new CornerRadius(10),Padding = new Thickness(10),Margin = _screenOffset,LayoutTransform = new ScaleTransform(_scaleFactor, _scaleFactor),Child = new TextBlock{Text = text,Foreground = System.Windows.Media.Brushes.White,FontSize = 20}};KeyDisplayPanel.Children.Add(_activeBlock);}private void UpdateActiveDisplay(string text){if (_activeBlock != null){((TextBlock)_activeBlock.Child).Text = text;}}private void ResetGroupTimer(){_groupTimer?.Stop();_groupTimer = new DispatcherTimer{Interval = TimeSpan.FromSeconds(0.5)};_groupTimer.Tick += (s, e) =>{_groupTimer.Stop();if (_activeBlock != null){StartFadeOut(_activeBlock);_activeBlock = null;}};_groupTimer.Start();}#endregion#region 动画淡出private void StartFadeOut(Border border){var animation = new DoubleAnimation{From = border.Opacity,To = 0.0,Duration = TimeSpan.FromSeconds(3),FillBehavior = FillBehavior.HoldEnd};animation.Completed += (s, e) =>{KeyDisplayPanel.Children.Remove(border);};border.BeginAnimation(UIElement.OpacityProperty, animation);}private void OpenSettings(){var settingsWindow = new SettingsWindow();settingsWindow.ShowDialog();var settings = SettingsManager.Load();_scaleFactor = settings.Scale;_screenOffset = new Thickness(settings.OffsetX, settings.OffsetY, 20, 20);}#endregion#region 清理资源protected override void OnClosed(EventArgs e){_globalHook.KeyDown -= OnInputEvent;_globalHook.MouseDown -= OnInputEvent;_globalHook.Dispose();base.OnClosed(e);}#endregion}
}

使用到的字段：监听器对象、按键队列、动画定时器、缩放与位移。

加入组合键监听，使用‘+’连接

private string FormatKeyList(List<string> keys)
{var sb = new StringBuilder();for (int i = 0; i < keys.Count; i++){string current = keys[i];bool currentIsLetter = current.Length == 1 && current[0] >= 'A' && current[0] <= 'Z';if (i > 0){string previous = keys[i - 1];bool previousIsLetter = previous.Length == 1 && previous[0] >= 'A' && previous[0] <= 'Z';if (!(previousIsLetter && currentIsLetter)){sb.Append(" + ");}}sb.Append(current);}return sb.ToString();
}

加上鼠标监听，和键盘的要放在一起，毕竟光有按键的同时，有些操作仍然需要鼠标的参与

private void OnInputEvent(object sender, EventArgs e)
{string inputStr = e switch{System.Windows.Forms.KeyEventArgs keyEvent => keyEvent.KeyCode.ToString(),System.Windows.Forms.MouseEventArgs mouseEvent => mouseEvent.Button switch{System.Windows.Forms.MouseButtons.Left => "MouseLeft",System.Windows.Forms.MouseButtons.Right => "MouseRight",System.Windows.Forms.MouseButtons.Middle => "MouseMiddle",_ => mouseEvent.Button.ToString()},_ => string.Empty};if (string.IsNullOrEmpty(inputStr))return;// 以下省略……
}

最后加入最大的框体数限制，获取连续输入的最大时间间隔（我这里用了0.5s），同时保证单纯输入A~Z的字母的时候不需要使用+连接，设置每个框体的淡出时间防止遮挡视野。。。

private void ResetGroupTimer()
{_groupTimer?.Stop();_groupTimer = new DispatcherTimer{Interval = TimeSpan.FromSeconds(0.5)};_groupTimer.Tick += (s, e) =>{_groupTimer.Stop();if (_activeBlock != null){StartFadeOut(_activeBlock);_activeBlock = null;}};_groupTimer.Start();
}

private void StartFadeOut(Border border)
{var animation = new DoubleAnimation{From = border.Opacity,To = 0.0,Duration = TimeSpan.FromSeconds(3),FillBehavior = FillBehavior.HoldEnd};animation.Completed += (s, e) =>{KeyDisplayPanel.Children.Remove(border);};border.BeginAnimation(UIElement.OpacityProperty, animation);
}

我们得到了。。。电脑右下角的按键提示！