做完棋盘之后却无法完成左键点击棋盘，而切换棋盘BMP图片

做完棋盘之后却无法完成左键点击棋盘，而切换棋盘BMP图片

解决办法：
目前推测可能是因为HDC的原因造成无法切换，HDC只能在WM_PAINT消息中使用，其它消息中使用都不会被执行。
有了原因就想出对策，把需要HDC的函数全部放在WM_PAINT消息中去处理，这样就可以共用WM_PAINT中的HDC了

代码：
  1. HINSTANCE g_hInst = NULL;
  2. HANDLE g_hStdout = NULL; //控制台
  3. CHAR szText[256] = { 0 }; //调试用
  4. #define PrintLog(x) 	WriteConsole(g_hStdout, x, strlen(x), 0, 0);
  6. int i = 1;
  8. //获得坐标
  9. int xPos = 0;
  10. int yPos = 0;
  12. void DrawBk(HDC hDC)
  13. {
  14. 	int marc = 0; //控制棋盘所在位置
  16. 	for (int i = 0; i < 10; i++) //画九格横线
  17. 	{
  18. 		MoveToEx(hDC, marc + 50, marc + 50 + i * 48, NULL);
  19. 		LineTo(hDC, marc + 480, marc + 50 + i * 48);
  20. 	}
  21. 	for (int j = 0; j < 10; j++) //画九格直线
  22. 	{
  23. 		MoveToEx(hDC, marc + 50 + j * 48, marc + 50, NULL);
  24. 		LineTo(hDC, marc + 50 + j * 48, marc + 480);
  25. 	}
  27. 	//背景图处理
  28. 	HBITMAP hBitMap = LoadBitmap(g_hInst, MAKEINTRESOURCE(IDB_BKMP1));
  29. 	HDC hBmap = CreateCompatibleDC(hDC);
  30. 	HGDIOBJ hOldBmp = SelectObject(hBmap, hBitMap);
  32. 	//绘图开始
  33. 	for (int i = 0; i < 9; i++)
  34. 	{
  35. 		for (int j = 0; j < 9; j++)
  36. 		{
  37. 			BitBlt(hDC, 50 + j * 48, 50 + i * 48, 48, 48, hBmap, 0, 0, MERGECOPY);
  38. 		}
  39. 	}
  42. 	SelectObject(hDC, hOldBmp);
  43. 	DeleteDC(hBmap);
  44. 	DeleteObject(hBitMap);
  45. }
  47. void OnLButton(HDC hDC)
  48. {
  49. 	//PAINTSTRUCT ps = { 0 };
  50. 	//HDC hDC = BeginPaint(hWnd, &ps);
  51. 	int marc = 0; //控制棋盘所在位置
  53. 	if (xPos>50 && yPos >50)
  54. 	{
  55. 		//背景图处理
  56. 		HBITMAP hBitMap = LoadBitmap(g_hInst, MAKEINTRESOURCE(IDB_BKMP2));
  57. 		HDC hBmap = CreateCompatibleDC(hDC);
  58. 		HGDIOBJ hOldBmp = SelectObject(hBmap, hBitMap);
  60. 		//绘图开始
  61. 		int xPoint = (xPos - 50) / 48;
  62. 		int yPoint = (yPos - 50) / 48;
  63. 		sprintf_s(szText, 256, "OnLButton,x=%d,y=%d\n", xPoint, yPoint);
  64. 		PrintLog(szText);
  65. 		BitBlt(hDC, 50 + xPoint * 48, 50 + yPoint * 48, 48, 48, hBmap, 0, 0, SRCCOPY);
  67. 		SelectObject(hDC, hOldBmp);
  68. 		DeleteDC(hBmap);
  69. 		DeleteObject(hBitMap);
  70. 	}
  71. }
  73. //OnPaint
  74. void OnPaint(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam)
  75. {
  76. 	PAINTSTRUCT ps = { 0 };
  77. 	HDC hDC = BeginPaint(hWnd, &ps);
  79. 	
  80. 	if (i == 1) //暂时屏蔽棋盘每次刷新的办法，后面可以用控件解决
  81. 	{
  82. 		DrawBk(hDC);
  83. 		i = 2;
  84. 	}
  86. 	OnLButton(hDC);
  88. 	EndPaint(hWnd, &ps);
  89. }





posted @ 2016-06-10 07:53  -刀狂剑痴-  阅读(294)  评论(0)  编辑  收藏  举报