/// <summary>
/// 获取X,Y轴的状态
/// </summary>
/// <param name="lParam"></param>
/// <param name="buttons"></param>
private void GetXYButtonsStateFromLParam(Int64 lParam, ref JoystickEventArgs e)
{
//处理X,Y轴
int x = ((int)(lParam & 0x0000FFFF)) / 2000; //低16位存储X轴坐标
int y = ((int)((lParam & 0xFFFF0000) >> 16)) / 2000; //高16位存储Y轴坐标(不直接移位是为避免0xFFFFFF)
int m = 16; //中心点的值,
e.Move.X = x - m;
e.Move.Y = y - m;
if (x > m)
{
e.Buttons |= JoystickButtons.Right;
}
else if (x < m)
{
e.Buttons |= JoystickButtons.Left;
}
if (y > m)
{
e.Buttons |= JoystickButtons.Down;
}
else if (y < m)
{
e.Buttons |= JoystickButtons.UP;
}
}
/// <summary>
/// 根据消息的参数获取按钮的按压状态值
/// </summary>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
private JoystickEventArgs GetButtonsPressedStateFromMessageParam(int wParam, int lParam)
{
JoystickEventArgs e = new JoystickEventArgs();
e.Buttons = JoystickButtons.None;
//JoystickButtons buttons = JoystickButtons.None;
if ((wParam & API.JOY_BUTTON1CHG) == API.JOY_BUTTON1CHG)
{
e.Buttons |= JoystickButtons.B1;
}
if ((wParam & API.JOY_BUTTON2CHG) == API.JOY_BUTTON2CHG)
{
e.Buttons |= JoystickButtons.B2;
}
if ((wParam & API.JOY_BUTTON3CHG) == API.JOY_BUTTON3CHG)
{
e.Buttons |= JoystickButtons.B3;
}
if ((wParam & API.JOY_BUTTON4CHG) == API.JOY_BUTTON4CHG)
{
e.Buttons |= JoystickButtons.B4;
}
GetXYButtonsStateFromLParam(lParam, ref e);
return(e);
}
/// <summary>
/// 根据消息的参数获取按钮的状态值
/// </summary>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
private JoystickEventArgs GetButtonsStateFromMessageParam(Int64 wParam, Int64 lParam)
{
JoystickEventArgs e = new JoystickEventArgs();
e.Buttons = JoystickButtons.None;
//JoystickButtons buttons = JoystickButtons.None;
if ((wParam & API.JOY_BUTTON1) == API.JOY_BUTTON1)
{
e.Buttons |= JoystickButtons.B1;
}
if ((wParam & API.JOY_BUTTON2) == API.JOY_BUTTON2)
{
e.Buttons |= JoystickButtons.B2;
}
if ((wParam & API.JOY_BUTTON3) == API.JOY_BUTTON3)
{
e.Buttons |= JoystickButtons.B3;
}
if ((wParam & API.JOY_BUTTON4) == API.JOY_BUTTON4)
{
e.Buttons |= JoystickButtons.B4;
}
if ((wParam & API.JOY_BUTTON5) == API.JOY_BUTTON5)
{
e.Buttons |= JoystickButtons.B5;
}
if ((wParam & API.JOY_BUTTON6) == API.JOY_BUTTON6)
{
e.Buttons |= JoystickButtons.B6;
}
if ((wParam & API.JOY_BUTTON7) == API.JOY_BUTTON7)
{
e.Buttons |= JoystickButtons.B7;
}
if ((wParam & API.JOY_BUTTON8) == API.JOY_BUTTON8)
{
e.Buttons |= JoystickButtons.B8;
}
if ((wParam & API.JOY_BUTTON9) == API.JOY_BUTTON9)
{
e.Buttons |= JoystickButtons.B9;
}
if ((wParam & API.JOY_BUTTON10) == API.JOY_BUTTON10)
{
e.Buttons |= JoystickButtons.B10;
}
if ((wParam & API.JOY_BUTTON11) == API.JOY_BUTTON11)
{
e.Buttons |= JoystickButtons.B11;
}
if ((wParam & API.JOY_BUTTON12) == API.JOY_BUTTON12)
{
e.Buttons |= JoystickButtons.B12;
}
GetXYButtonsStateFromLParam(lParam, ref e);
return(e);
}
/// <summary>
/// 触发按钮按下事件
/// </summary>
/// <param name="e"></param>
protected void OnButtonDown(JoystickEventArgs e)
{
EventHandler <JoystickEventArgs> h = this.ButtonDown;
if (h != null)
{
h(this, e);
}
}
/// <summary>
/// 触发单击事件
/// </summary>
/// <param name="e"></param>
protected void OnClick(JoystickEventArgs e)
{
EventHandler <JoystickEventArgs> h = this.Click;
if (h != null)
{
h(this, e);
}
}
/// <summary>
/// 处理系统消息.
/// </summary>
/// <param name="m"></param>
/// <returns></returns>
bool IMessageFilter.PreFilterMessage(ref Message m)
{
bool flag = false;
if (m.HWnd != IntPtr.Zero && (m.WParam != IntPtr.Zero || m.LParam != IntPtr.Zero))
{
Action <JoystickEventArgs> action = null;
JoystickEventArgs e = new JoystickEventArgs();
e.Buttons = JoystickButtons.None;
//JoystickButtons buttons = JoystickButtons.None;
int joystickId = -1;
switch (m.Msg)
{
case API.MM_JOY1MOVE:
case API.MM_JOY2MOVE:
//单击事件
e = GetButtonsStateFromMessageParam(m.WParam.ToInt64(), m.LParam.ToInt64());
action = this.OnClick;
joystickId = m.Msg == API.MM_JOY1MOVE ? API.JOYSTICKID1 : API.JOYSTICKID2;
break;
case API.MM_JOY1BUTTONDOWN:
case API.MM_JOY2BUTTONDOWN:
//按钮被按下
e = GetButtonsPressedStateFromMessageParam(m.WParam.ToInt32(), m.LParam.ToInt32());
action = this.OnButtonDown;
joystickId = m.Msg == API.MM_JOY1BUTTONDOWN ? API.JOYSTICKID1 : API.JOYSTICKID2;
break;
case API.MM_JOY1BUTTONUP:
case API.MM_JOY2BUTTONUP:
//按钮被弹起
e = GetButtonsPressedStateFromMessageParam(m.WParam.ToInt32(), m.LParam.ToInt32());
action = this.OnButtonUp;
joystickId = m.Msg == API.MM_JOY1BUTTONUP ? API.JOYSTICKID1 : API.JOYSTICKID2;
break;
}
//if (action != null && joystickId != -1 && e.Buttons != JoystickButtons.None)
if (action != null && joystickId != -1)
{
//阻止消息继续传递
flag = true;
e.JoystickId = joystickId;
//触发事件
action(e);//new JoystickEventArgs(joystickId, buttons));
}
}
return(flag);
}
