target.cpp

   1 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\r
   2 // target.cpp\r
   3 \r
   4 \r
   5 #include "misc.h"\r
   6 \r
   7 #include "mayurc.h"\r
   8 #include "target.h"\r
   9 #include "windowstool.h"\r
  10 \r
  11 \r
  12 ///\r
  13 class Target\r
  14 {\r
  15         HWND m_hwnd;                                    ///\r
  16         HWND m_preHwnd;                         ///\r
  17         HICON m_hCursor;                                ///\r
  18 \r
  19         ///\r
  20         static void invertFrame(HWND i_hwnd) {\r
  21                 HDC hdc = GetWindowDC(i_hwnd);\r
  22                 ASSERT(hdc);\r
  23                 int rop2 = SetROP2(hdc, R2_XORPEN);\r
  24                 if (rop2) {\r
  25                         RECT rc;\r
  26                         CHECK_TRUE( GetWindowRect(i_hwnd, &rc) );\r
  27                         int width = rcWidth(&rc);\r
  28                         int height = rcHeight(&rc);\r
  29 \r
  30                         HANDLE hpen = SelectObject(hdc, GetStockObject(WHITE_PEN));\r
  31                         HANDLE hbr  = SelectObject(hdc, GetStockObject(NULL_BRUSH));\r
  32                         CHECK_TRUE( Rectangle(hdc, 0, 0, width    , height    ) );\r
  33                         CHECK_TRUE( Rectangle(hdc, 1, 1, width - 1, height - 1) );\r
  34                         CHECK_TRUE( Rectangle(hdc, 2, 2, width - 2, height - 2) );\r
  35                         SelectObject(hdc, hpen);\r
  36                         SelectObject(hdc, hbr);\r
  37                         // no need to DeleteObject StockObject\r
  38                         SetROP2(hdc, rop2);\r
  39                 }\r
  40                 CHECK_TRUE( ReleaseDC(i_hwnd, hdc) );\r
  41         }\r
  42 \r
  43         ///\r
  44         Target(HWND i_hwnd)\r
  45                         : m_hwnd(i_hwnd),\r
  46                         m_preHwnd(NULL),\r
  47                         m_hCursor(NULL) {\r
  48         }\r
  49 \r
  50         /// WM_CREATE\r
  51         int wmCreate(CREATESTRUCT * /* i_cs */) {\r
  52                 CHECK_TRUE( m_hCursor =\r
  53                                                 LoadCursor(g_hInst, MAKEINTRESOURCE(IDC_CURSOR_target)) );\r
  54                 return 0;\r
  55         }\r
  56 \r
  57         /// WM_PAINT\r
  58         int wmPaint() {\r
  59                 PAINTSTRUCT ps;\r
  60                 HDC hdc = BeginPaint(m_hwnd, &ps);\r
  61                 ASSERT(hdc);\r
  62 \r
  63                 if (GetCapture() != m_hwnd) {\r
  64                         RECT rc;\r
  65                         CHECK_TRUE( GetClientRect(m_hwnd, &rc) );\r
  66                         CHECK_TRUE(\r
  67                                 DrawIcon(hdc, (rcWidth(&rc) - GetSystemMetrics(SM_CXICON)) / 2,\r
  68                                                  (rcHeight(&rc) - GetSystemMetrics(SM_CYICON)) / 2,\r
  69                                                  m_hCursor) );\r
  70                 }\r
  71 \r
  72                 EndPaint(m_hwnd, &ps);\r
  73                 return 0;\r
  74         }\r
  75 \r
  76         ///\r
  77         struct PointWindow {\r
  78                 POINT m_p;                                      ///\r
  79                 HWND m_hwnd;                            ///\r
  80                 RECT m_rc;                                      ///\r
  81         };\r
  82 \r
  83         ///\r
  84         static BOOL CALLBACK childWindowFromPoint(HWND i_hwnd, LPARAM i_lParam) {\r
  85                 if (IsWindowVisible(i_hwnd)) {\r
  86                         PointWindow &pw = *(PointWindow *)i_lParam;\r
  87                         RECT rc;\r
  88                         CHECK_TRUE( GetWindowRect(i_hwnd, &rc) );\r
  89                         if (PtInRect(&rc, pw.m_p))\r
  90                                 if (isRectInRect(&rc, &pw.m_rc)) {\r
  91                                         pw.m_hwnd = i_hwnd;\r
  92                                         pw.m_rc = rc;\r
  93                                 }\r
  94                 }\r
  95                 return TRUE;\r
  96         }\r
  97 \r
  98         ///\r
  99         static BOOL CALLBACK windowFromPoint(HWND i_hwnd, LPARAM i_lParam) {\r
 100                 if (IsWindowVisible(i_hwnd)) {\r
 101                         PointWindow &pw = *(PointWindow *)i_lParam;\r
 102                         RECT rc;\r
 103                         CHECK_TRUE( GetWindowRect(i_hwnd, &rc) );\r
 104                         if (PtInRect(&rc, pw.m_p)) {\r
 105                                 pw.m_hwnd = i_hwnd;\r
 106                                 pw.m_rc = rc;\r
 107                                 return FALSE;\r
 108                         }\r
 109                 }\r
 110                 return TRUE;\r
 111         }\r
 112 \r
 113         /// WM_MOUSEMOVE\r
 114         int wmMouseMove(WORD /* i_keys */, int /* i_x */, int /* i_y */) {\r
 115                 if (GetCapture() == m_hwnd) {\r
 116                         PointWindow pw;\r
 117                         CHECK_TRUE( GetCursorPos(&pw.m_p) );\r
 118                         pw.m_hwnd = 0;\r
 119                         CHECK_TRUE( GetWindowRect(GetDesktopWindow(), &pw.m_rc) );\r
 120                         EnumWindows(windowFromPoint, (LPARAM)&pw);\r
 121                         while (1) {\r
 122                                 HWND hwndParent = pw.m_hwnd;\r
 123                                 if (!EnumChildWindows(pw.m_hwnd, childWindowFromPoint, (LPARAM)&pw))\r
 124                                         break;\r
 125                                 if (hwndParent == pw.m_hwnd)\r
 126                                         break;\r
 127                         }\r
 128                         if (pw.m_hwnd != m_preHwnd) {\r
 129                                 if (m_preHwnd)\r
 130                                         invertFrame(m_preHwnd);\r
 131                                 m_preHwnd = pw.m_hwnd;\r
 132                                 invertFrame(m_preHwnd);\r
 133                                 SendMessage(GetParent(m_hwnd), WM_APP_targetNotify, 0,\r
 134                                                         (LPARAM)m_preHwnd);\r
 135                         }\r
 136                         SetCursor(m_hCursor);\r
 137                 }\r
 138                 return 0;\r
 139         }\r
 140 \r
 141         /// WM_LBUTTONDOWN\r
 142         int wmLButtonDown(WORD /* i_keys */, int /* i_x */, int /* i_y */) {\r
 143                 SetCapture(m_hwnd);\r
 144                 SetCursor(m_hCursor);\r
 145                 CHECK_TRUE( InvalidateRect(m_hwnd, NULL, TRUE) );\r
 146                 CHECK_TRUE( UpdateWindow(m_hwnd) );\r
 147                 return 0;\r
 148         }\r
 149 \r
 150         /// WM_LBUTTONUP\r
 151         int wmLButtonUp(WORD /* i_keys */, int /* i_x */, int /* i_y */) {\r
 152                 if (m_preHwnd)\r
 153                         invertFrame(m_preHwnd);\r
 154                 m_preHwnd = NULL;\r
 155                 ReleaseCapture();\r
 156                 CHECK_TRUE( InvalidateRect(m_hwnd, NULL, TRUE) );\r
 157                 CHECK_TRUE( UpdateWindow(m_hwnd) );\r
 158                 return 0;\r
 159         }\r
 160 \r
 161 public:\r
 162         ///\r
 163         static LRESULT CALLBACK WndProc(HWND i_hwnd, UINT i_message,\r
 164                                                                         WPARAM i_wParam, LPARAM i_lParam) {\r
 165                 Target *wc;\r
 166                 getUserData(i_hwnd, &wc);\r
 167                 if (!wc)\r
 168                         switch (i_message) {\r
 169                         case WM_CREATE:\r
 170                                 wc = setUserData(i_hwnd, new Target(i_hwnd));\r
 171                                 return wc->wmCreate((CREATESTRUCT *)i_lParam);\r
 172                         }\r
 173                 else\r
 174                         switch (i_message) {\r
 175                         case WM_PAINT:\r
 176                                 return wc->wmPaint();\r
 177                         case WM_LBUTTONDOWN:\r
 178                                 return wc->wmLButtonDown((WORD)i_wParam, (short)LOWORD(i_lParam),\r
 179                                                                                  (short)HIWORD(i_lParam));\r
 180                         case WM_LBUTTONUP:\r
 181                                 return wc->wmLButtonUp((WORD)i_wParam, (short)LOWORD(i_lParam),\r
 182                                                                            (short)HIWORD(i_lParam));\r
 183                         case WM_MOUSEMOVE:\r
 184                                 return wc->wmMouseMove((WORD)i_wParam, (short)LOWORD(i_lParam),\r
 185                                                                            (short)HIWORD(i_lParam));\r
 186                         case WM_NCDESTROY:\r
 187                                 delete wc;\r
 188                                 return 0;\r
 189                         }\r
 190                 return DefWindowProc(i_hwnd, i_message, i_wParam, i_lParam);\r
 191         }\r
 192 };\r
 193 \r
 194 \r
 195 //\r
 196 ATOM Register_target()\r
 197 {\r
 198         WNDCLASS wc;\r
 199         wc.style         = CS_HREDRAW | CS_VREDRAW;\r
 200         wc.lpfnWndProc   = Target::WndProc;\r
 201         wc.cbClsExtra    = 0;\r
 202         wc.cbWndExtra    = 0;\r
 203         wc.hInstance     = g_hInst;\r
 204         wc.hIcon         = NULL;\r
 205         wc.hCursor       = LoadCursor(NULL, IDC_ARROW);\r
 206         wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);\r
 207         wc.lpszMenuName  = NULL;\r
 208         wc.lpszClassName = _T("mayuTarget");\r
 209         return RegisterClass(&wc);\r
 210 }\r