用鼠标手势动作来发送命令

用鼠标手势动作来发送命令


作者：Bborn

下载源代码


在一些比较不错的浏览器中,出现了一些新的功能,通过鼠标动作(也称鼠标手势Mouse Gestures)来发出一些命令,比如opera,myie2.一般是这样,先按住鼠标右键,不要松,然后画直线或者其他设定的路径,就可以完成指定的命令。下面我们就来实现这个功能,具体的核心代码来自共享软件联盟小树冲浪浏览器中,整理改编了其中的一些地方。


1.建立一个对话框程序,声明以下变量和函数

 BOOL m_bIsCapture;//一个标志变量 char m_MouseGestures[4], m_SeqMG[4];//用来保存鼠标动作的代码U(上) D(下)等.. int m_iMGLen; int m_iMouseGS, m_iMouseGE;  POINT  m_StartPoint;  //鼠标的坐标点 BOOL MoveDirection(CPoint& point, char* Direction); //判断鼠标的简单动作,四个,上下左右 void PushMouseGesture(char gesture);//把鼠标动作的代码保存起来           

 if( nFlags == MK_RBUTTON) //判断时候鼠标右键按下 {      if (m_bIsCapture)   //初始的值的TRUE, 只有当第一点的时候发生里面的动作               {         m_bIsCapture=FALSE;            SetCapture(); //捕获鼠标      m_StartPoint = point; //记录初始坐标点              }  char dir;   if(MoveDirection(point, &dir))      //调用函数  {   PushMouseGesture(dir);   m_StartPoint = point;  } }  CDialog::OnMouseMove(nFlags, point);} 

BOOL Cmouse2Dlg::MoveDirection(CPoint &point, char *Direction){ int x = point.x - m_StartPoint.x; int y = point.y - m_StartPoint.y; int dist = x*x+y*y;          if(dist>64) {  if(x>abs(y) && x0)   *Direction = RBUT_RIGHT;  else if(abs(x)abs(y) && x<0)   *Direction = RBUT_LEFT;  else if(yabs(x) && y0)   *Direction = RBUT_DOWN;  else if(abs(y)abs(x) && y<0)   *Direction = RBUT_UP;   else   return FALSE;  return TRUE; } else  return FALSE;}

if(m_iMouseGE!=0 || m_iMouseGS !=0)  //m_iMouseGS和m_iMouseGE初始为0 {  int pre = (m_iMouseGE -1 + m_iMGLen)m_iMGLen;    if(m_MouseGestures[pre] == gesture)   return; } m_MouseGestures[m_iMouseGE] = gesture; m_iMouseGE = (m_iMouseGE+1)m_iMGLen; if(m_iMouseGS == m_iMouseGE)  m_iMouseGS = (m_iMouseGS + 1)m_iMGLen;

if(!m_bIsCapture)     //看标志变量,是否触发了鼠标动作 { m_bIsCapture=TRUE;  ReleaseCapture();   int i =0; m_SeqMG[0]= '''';  while(m_iMouseGE != m_iMouseGS)   //将鼠标动作保存到m_SeqMG中,并在最后加上  {   m_SeqMG[i] = m_MouseGestures[m_iMouseGS];   i++;   m_SeqMG[i] = '''';   m_iMouseGS = (m_iMouseGS +1)m_iMGLen;    }  if(i>0)          //开始比较鼠标动作,在这里可以加上自定义的动作和命令!  {   if(strcmp(m_SeqMG, "D")==0)     m_mouse="Down";   else if(strcmp(m_SeqMG, "L")==0)     m_mouse="Left";   else if(strcmp(m_SeqMG, "U")==0)     m_mouse="Up";   else if(strcmp(m_SeqMG, "R")==0)     m_mouse="Right";   else if(strcmp(m_SeqMG, "UD")==0)     m_mouse="Up Down";   else if(strcmp(m_SeqMG, "RLR")==0)     m_mouse="Right Left Right";   else if(strcmp(m_SeqMG, "UL")==0)      m_mouse="Up Left";   else if(strcmp(m_SeqMG, "UR")==0)      m_mouse="Up Right";   else {    m_mouse="";    i = 0;       }  } UpdateData(FALSE); }