MF的标准模块仅支持按键，并不支持鼠标功能。但是对一些常见应用来说，如果没有鼠标(或触摸屏)用起来就太不习惯了。有什么办法可以让MF支持鼠标功能呢？第一，外部设备必须把鼠标信息传到MF应用程序，应用程序根据这些信息绘制鼠标及执行相应的动作。鼠标信息最少包含三种，鼠标按键状态（按下或放开），鼠标坐标（x，y）。
目前，Spi通道可以非常方便地建立设备和用户程序之间的联系，所以就考虑用Spi来实现该功能。
第一步，还是从我编写的模拟器入手，添加了一个Spi驱动类。
- //MouseDevice
- public class MouseComponent : SpiDevice
- {
- public static Int16 State = 0;
- public static Int16 X = 0;
- public static Int16 Y = 0;
- protected override byte[] Write(byte[] data)
- {
- //------------
- //改写坐标值
- try
- {
- //State = (Int16)((data[0] << 8) + data[1]);
- //X = (Int16)((data[2] << 8) + data[3]);
- //Y = (Int16)((data[4] << 8) + data[5]);
- }
- catch { }
- //------------
- //返回当前值
- byte[] bytes = new byte[6];
- bytes[0] = (byte)(State >> 8);
- bytes[1] = (byte)(State & 0xff);
- bytes[2] = (byte)(X >> 8);
- bytes[3] = (byte)(X & 0xff);
- bytes[4] = (byte)(Y >> 8);
- bytes[5] = (byte)(Y & 0xff);
- return bytes;
- }
- protected override ushort[] Write(ushort[] data)
- {
- //------------
- //改写坐标值
- try
- {
- //State = (Int16)data[0];
- //X = (Int16)data[1];
- //Y = (Int16)data[2];
- }
- catch { }
- //------------
- //返回当前值
- ushort[] Int16s = new ushort[3];
- Int16s[0] = (ushort)State;
- Int16s[1] = (ushort)X;
- Int16s[2] = (ushort)Y;
- return Int16s;
- }
- }
第二步：编写鼠标应用程序
为了通用，我封装了一个windowbase基类
- //鼠标事件
- public class MouseEventArgs : EventArgs
- {
- public int X;
- public int Y;
- public int Button;
- public MouseEventArgs()
- {
- X = 0;
- Y = 0;
- Button = 0;
- State = MouseState.None;
- }
- public MouseEventArgs(int x, int y)
- {
- X = x;
- Y = y;
- Button = 0;
- State = MouseState.None;
- }
- public MouseEventArgs(int x, int y, int button)
- {
- X = x;
- Y = y;
- Button = button;
- State = MouseState.None;
- }
- }
- //窗体基类
- internal class WindowBase : Window
- {
- protected YFWinApp m_app;
- Thread MouseThread;
- private ushort state=0, x = 0, y = 0;
- SPI _spi=null;
- protected WindowBase(YFWinApp app)
- {
- m_app = app;
- this.Visibility = Visibility.Visible;
- this.Width = SystemMetrics.ScreenWidth;
- this.Height = SystemMetrics.ScreenHeight;
- Buttons.Focus(this);
- //SPI的pin定义
- _spi = new SPI(new SPI.Configuration((Cpu.Pin)127, true, 0, 0, false, false, 4000, SPI.SPI_module.SPI1));
- x =(ushort)( this.Width/2);
- y =(ushort)( this.Height/2);
- MouseThread = new Thread(new ThreadStart(MouseInfo));
- MouseThread.Start();
- }
- protected override void OnButtonDown(ButtonEventArgs e)
- {
- this.Close();
- m_app.GoHome();
- }
- //获得鼠标信息
- private void MouseInfo()
- {
- ushort[] bout = new ushort[3];
- ushort[] bin = new ushort[3];
- ushort mX, mY, mState;
- while (true)
- {
- //----------------------------------
- //通过spi通道获取鼠标信息 这部分信息解析和模拟器相对应
- _spi.WriteRead(bout, bin);
- mState = bin[0]; //鼠标的状态 1- 按下 0 - 放开
- mX = bin[1]; //鼠标X坐标
- mY = bin[2]; //鼠标Y坐标
- //----------------------------------
- if (x != mX|| y != mY)
- {
- x = mX; y = mY;
- OnMouseMove(new MouseEventArgs(mX, mY, mState));
- }
- if (state != mState)
- {
- state = mState;
- if (state == 1)
- {
- OnMouseDown(new MouseEventArgs(mX, mY, mState));
- }
- else if(state==0)
- {
- OnMouseUp(new MouseEventArgs(mX, mY, mState));
- OnMouseClick(new MouseEventArgs(mX, mY, mState));
- }
- }
- }
- }
- //鼠标移动
- protected virtual void OnMouseMove(MouseEventArgs e)
- {
- Debug.Print("MouseMove:" + e.X.ToString() + "," + e.Y.ToString() + "," + e.Button.ToString());
- }
- //鼠标单击
- protected virtual void OnMouseClick(MouseEventArgs e)
- {
- Debug.Print("MouseClick:" + e.X.ToString() + "," + e.Y.ToString() + "," + e.Button.ToString());
- }
- //按下
- protected virtual void OnMouseDown(MouseEventArgs e)
- {
- Debug.Print("MouseDown:" + e.X.ToString() + "," + e.Y.ToString() + "," + e.Button.ToString());
- }
- //抬起
- protected virtual void OnMouseUp(MouseEventArgs e)
- {
- Debug.Print("MouseUp:" + e.X.ToString() + "," + e.Y.ToString() + "," + e.Button.ToString());
- }
- //绘制鼠标
- public override void OnRender(DrawingContext dc)
- {
- if (state == 1)
- {
- Pen pp=new Pen(ColorUtility.ColorFromRGB(255,255,0));
- dc.DrawLine(pp, x, y - 5, x, y + 5);
- dc.DrawLine(pp, x-5, y, x+5, y);
- }
- int[] points = { x, y, x+10, y+4, x+5,y+5, x+4,y+10};
- Pen p = new Pen(Color.White, 1);
- dc.DrawPolygon(null, p, points);
- }
- //窗体刷新
- protected void Refresh()
- {
- this.Left = this.Left;
- this.UpdateLayout();
- }
- }
下面是我们实际运行的效果图，已经非常完美的支持鼠标了（并且模拟器可两种方式提供鼠标信息，一种是鼠标直接在LCD屏上操作，一种是通过扩展面板上的滑块进行移动）。
直接用外部鼠标操作。
通过滑块进行鼠标操作。
本文转自yefanqiu51CTO博客，原文链接：http://blog.51cto.com/yfsoft/322917，如需转载请自行联系原作者
