dinput.cs

Beginning C# Game Programming 的源代码

using System;
using System.Drawing;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.DirectInput;

/// <summary>
/// This class is where the DirectInput routines
/// for the application resides.
/// </summary>
public class InputClass
{

    private Control owner = null;
    private Device localDevice = null;

    public InputClass(Control owner)
    {
        this.owner = owner;

        localDevice = new Device(SystemGuid.Keyboard);
        localDevice.SetDataFormat(DeviceDataFormat.Keyboard);
        localDevice.SetCooperativeLevel(owner, CooperativeLevelFlags.Foreground | CooperativeLevelFlags.NonExclusive);         
    }
    
	public KeyboardState GetInputState()
	{
		KeyboardState kbState = null;

		try
		{
			kbState = localDevice.GetCurrentKeyboardState();
		}
		catch(InputException)
		{
			do
			{
				Application.DoEvents();
				try{ localDevice.Acquire(); }
				catch (InputLostException)
				{ continue; }
				catch(OtherApplicationHasPriorityException)
				{ continue; }

				break;

			}while( true );
		}
		return kbState;
	}
}