mirror of
https://github.com/Ellpeck/MLEM.git
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49 lines
1.7 KiB
C#
49 lines
1.7 KiB
C#
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using System;
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using System.Reflection;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Input;
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namespace MLEM.Extensions {
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public static class WindowExtensions {
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private static readonly EventInfo TextInput = typeof(GameWindow).GetEvent("TextInput");
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public static bool AddTextInputListener(this GameWindow window, TextInputCallback callback) {
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return new TextInputReflector(callback).AddToWindow(window);
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}
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public static bool SupportsTextInput() {
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return TextInput != null;
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}
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public delegate void TextInputCallback(object sender, Keys key, char character);
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private class TextInputReflector {
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private readonly TextInputCallback callback;
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public TextInputReflector(TextInputCallback callback) {
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this.callback = callback;
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}
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public bool AddToWindow(GameWindow window) {
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if (TextInput == null)
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return false;
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var handler = this.GetType().GetMethod(nameof(this.OnTextInput), new[] {typeof(object), typeof(EventArgs)});
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if (handler == null)
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return false;
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TextInput.AddEventHandler(window, Delegate.CreateDelegate(TextInput.EventHandlerType, this, handler));
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return true;
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}
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public void OnTextInput(object sender, EventArgs args) {
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var type = args.GetType();
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var key = (Keys) type.GetProperty("Key").GetValue(args);
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var character = (char) type.GetProperty("Character").GetValue(args);
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this.callback.Invoke(sender, key, character);
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}
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}
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}
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}
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