1 #define FACTOR   5
  2 #define EYE_X1  18
  3 #define EYE_X2  54
  4 #define EYE_Y   26
  5 #define EYE_RX  16
  6 #define EYE_RY  24
  7 #define MIN_VISIBILITY 50          /* Make sure at least this many pixels stay visible when moved */
  8 
  9 static int _Min(int a, int b) {
 10   return (a < b) ? a : b;
 11 }
 12 //画眼睛的函数
 13 static void _DrawEye(int x0, int y0, int rx, int ry, int x1, int y1) {
 14   int dx, dy, x, y;
 15   float Hyp;
 16   GUI_SetColor(GUI_WHITE);
 17   GUI_FillEllipse(x0, y0, rx, ry);
 18   GUI_SetColor(GUI_BLACK);
 19   GUI_DrawEllipse(x0, y0, rx, ry);
 20   /* Calculate the coordinates */
 21   dx  = x1 - x0 + 1;
 22   dy  = y1 - y0 + 1;
 23   Hyp = sqrt(dx * dx + dy * dy);
 24   x   = (dx * _Min(rx - 5, abs(dx)) * FACTOR / Hyp) + x0 * FACTOR;
 25   y   = (dy * _Min(ry - 5, abs(dy)) * FACTOR / Hyp) + y0 * FACTOR;
 26   /* Draw the pupil */
 27   GUI_AA_SetFactor(FACTOR);
 28   GUI_AA_EnableHiRes();
 29   GUI_SetColor(0xD00000);
 30   GUI_AA_FillCircle(x, y, 5.75 * FACTOR);
 31   GUI_SetColor(GUI_BLACK);
 32   GUI_AA_FillCircle(x, y, 3.75 * FACTOR);
 33   GUI_SetColor(GUI_GRAY);
 34   GUI_AA_FillCircle(x - 1.25 * FACTOR, y - 1.25 * FACTOR, 1.25 * FACTOR);
 35   GUI_AA_DisableHiRes();
 36 }
 37 //窗口消息回调函数
 38 static void _cbTransWindow(WM_MESSAGE* pMsg) {
 39   WM_HWIN hWin = pMsg->hWin;
 40   GUI_PID_STATE State;
 41   GUI_PID_GetState(&State);
 42   switch (pMsg->MsgId) {
 43   case WM_PAINT:
 44     State.x -= WM_GetWindowOrgX(hWin);//分别返回指定窗口的原点在桌面坐标中的X或Y位置
 45     State.y -= WM_GetWindowOrgY(hWin);
 46     _DrawEye(EYE_X1, EYE_Y, EYE_RX, EYE_RY, State.x, State.y);
 47     _DrawEye(EYE_X2, EYE_Y, EYE_RX, EYE_RY, State.x, State.y);
 48     break;
 49   case WM_TOUCH:
 50     if (pMsg->Data.p) {
 51       GUI_PID_STATE* pState = (GUI_PID_STATE*)pMsg->Data.p;
 52       if (pState->Pressed) {
 53         int mx, my, x;
 54         I32 Sum, SumY;
 55         I32 OutConst = EYE_RX * EYE_RX * EYE_RY * EYE_RY + (EYE_RX * EYE_RX * EYE_RY >> 1);
 56         mx = pState->x;
 57         my = (pState->y < EYE_Y) ? (EYE_Y - pState->y) : (pState->y - EYE_Y);
 58         if (my >= 0 && my <= EYE_RY) {
 59           int y;
 60           x = EYE_RX;
 61           for (y = 0; y <= my; y++) {
 62             SumY =((I32)(EYE_RX * EYE_RX)) * ((I32)(y * y));
 63             while (Sum = SumY + ((I32)(EYE_RY * EYE_RY)) * ((I32)(x * x)), (x > 0) && (Sum > OutConst)) {
 64               x--;
 65             }
 66           }
 67         } else {
 68           x = -EYE_RX;
 69         }
 70         if (((mx >= EYE_X1 - x) && (mx <= EYE_X1 + x)) || 
 71             ((mx >= EYE_X2 - x) && (mx <= EYE_X2 + x)) || WM_HasCaptured(hWin))
 72         {
 73           WM_SetCaptureMove(hWin, pState, MIN_VISIBILITY);
 74         } else {
 75           /* Transfer the message to the underlying window, since the transparent area has been clicked. */
 76           WM_HWIN hBelow = WM_Screen2hWinEx(hWin, State.x, State.y);
 77           if (hBelow) {
 78             pState->x = State.x - WM_GetWindowOrgX(hBelow);
 79             pState->y = State.y - WM_GetWindowOrgY(hBelow);
 80             WM_SendMessage(hBelow, pMsg);
 81           }
 82         }
 83       }
 84     }
 85     break;
 86   default:
 87     WM_DefaultProc(pMsg);
 88   }
 89 }
 90 //界面创建函数
 91 static void _DemoTransWindow(void) {
 92   WM_HWIN hTransWin, hFrameWin;
 93   WM_SetCreateFlags(WM_CF_MEMDEV);
 94   WM_EnableMemdev(WM_HBKWIN);
 95   WM_SetDesktopColor(GUI_RED);
 96   hTransWin = WM_CreateWindow(10,  10, 72, 52, WM_CF_SHOW | WM_CF_HASTRANS | WM_CF_STAYONTOP,
 97                               &_cbTransWindow, 0);
 98   hFrameWin = FRAMEWIN_Create("Framewin", 0, WM_CF_SHOW, 100, 70, 120, 100);    //创建一个FRAMEWIN小工具。（弃用）
 99   FRAMEWIN_SetActive(hFrameWin, 1);                                                //设置框架窗口的状态。（弃用）                                            
100   FRAMEWIN_SetMoveable(hFrameWin, 1);                                            //窗口可移动函数
101   GUI_CURSOR_Show();
102   while (1) {
103     WM_InvalidateWindow(hTransWin);                                                //使窗口无效。
104     GUI_Delay(20);
105   }
106 }
107 //主函数
108 void MainTask_eye(void) {
109   GUI_Init();
110   _DemoTransWindow();
111 }