柱形图及饼图显示数据统计

  1 #include <Windows.h>
  2 #include <tchar.h>
  3 #include <math.h>
  4 BOOLEAN InitWindowClass(HINSTANCE hInstance, int nCmdShow);
  5 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
  6 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
  7 {
  8     MSG msg;
  9     if (!InitWindowClass(hInstance, nCmdShow))
 10     {
 11         MessageBox(NULL, L"创建窗口失败！", _T("创建窗口"), NULL);
 12         return 1;
 13     }
 14     while (GetMessage(&msg, NULL, 0, 0))
 15     {
 16         TranslateMessage(&msg);
 17         DispatchMessage(&msg);
 18     }
 19     return(int)msg.wParam;
 20 }
 21 
 22 LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 23 {
 24     HDC hDC;
 25     PAINTSTRUCT ps;
 26     HBRUSH hBrush;
 27     HPEN hPen;
 28     RECT clientRect;
 29     static RECT oldClientRect = { 0, 0, 0, 0 };
 30     float sita = 0;
 31     int a[4] = { 75, 50, 60, 90 }, maxValue, i, xOrg, yOrg, deltaX, deltaY, xBegin, yBegin, xEnd, yEnd, s = 0;
 32     int hatchBrushStyle[4] = { HS_BDIAGONAL, HS_FDIAGONAL, HS_CROSS, HS_DIAGCROSS };                //四个阴影样式
 33     COLORREF colorIndex[4] = { RGB(255, 0, 0), RGB(0, 255, 0), RGB(0, 0, 255), RGB(255, 0, 255) };    //四种颜色
 34     switch (message)
 35     {
 36     case WM_PAINT:
 37         maxValue = a[0];
 38         for (i = 0; i < 4; i++)
 39         {
 40             s += a[i];
 41             if (a[i]>maxValue)
 42                 maxValue = a[i];
 43         }                                                                                    //计算所有数据总值和最大值
 44         hDC = BeginPaint(hWnd, &ps);
 45         GetClientRect(hWnd, &clientRect);                                                        //获取用户区的尺寸
 46         if ((clientRect.right - clientRect.left) < 300 || (clientRect.bottom - clientRect.top) < 300)    //判断屏幕尺寸
 47         {
 48             MessageBox(hWnd, L"屏幕尺寸大小，无法绘图！", L"错误信息", 0);
 49             //EndPaint(hWnd, &ps);                                                                //结束绘图
 50             break;
 51         }
 52         hPen = (HPEN)GetStockObject(BLACK_PEN);                                                    //设置画笔为系统预定义的黑色画笔
 53         SelectObject(hDC, hPen);                                                                //选择画笔
 54         Rectangle(hDC, clientRect.left + 10, clientRect.top + 10, clientRect.right - 10, clientRect.bottom - 10);
 55         MoveToEx(hDC, (clientRect.left + clientRect.right) / 2, clientRect.top + 10, NULL);
 56         LineTo(hDC, (clientRect.left + clientRect.right) / 2, clientRect.bottom - 10);                //从窗口的中间将窗口分为左右两部分
 57         //------------------------------以下是在左半部分用柱形图表示的数据分布图------------------------------
 58         xOrg = clientRect.left + 60;
 59         yOrg = clientRect.bottom - 60;                                                            //柱形图的坐标原点
 60         xEnd = (clientRect.left + clientRect.right) / 2 - 50;                                    //坐标轴的最右边
 61         yEnd = yOrg;
 62         deltaX = (xEnd - xOrg - 100) / 4;                                                        //计算水平坐标的单位像素
 63         MoveToEx(hDC, xOrg, yOrg, NULL);
 64         LineTo(hDC, xEnd, yEnd);                                                                //画水平坐标轴
 65         xEnd = xOrg;
 66         yEnd = clientRect.top + 60;                                                            //坐标轴的最上边
 67         MoveToEx(hDC, xOrg, yOrg, NULL);
 68         LineTo(hDC, xEnd, yEnd);                                                                //画垂直坐标轴
 69         deltaY = (yOrg - yEnd - 100) / maxValue;                                                //计算垂直坐标的单位像素
 70         hPen = CreatePen(PS_SOLID, 1, RGB(127, 127, 127));                                        //用灰色作为画笔
 71         SelectObject(hDC, hPen);                                                                //选择画笔
 72         for (i = 0; i < 4; i++)
 73         {
 74             hBrush = CreateHatchBrush(hatchBrushStyle[i], colorIndex[i]);                            //创建带阴影的画刷
 75             SelectObject(hDC, hBrush);                                                            //选择画刷
 76             xBegin = xOrg + deltaX*i;
 77             yBegin = yOrg;
 78             xEnd = xBegin + deltaX;
 79             yEnd = yOrg - a[i] * deltaY;
 80             Rectangle(hDC, xBegin, yBegin, xEnd, yEnd);                                            //每一部分的柱形图
 81         }
 82         //------------------------------以下是在右半部分用饼图表示的数据分布图------------------------------
 83         xOrg = clientRect.left + (clientRect.right - clientRect.left) * 3 / 4 + 10;
 84         yOrg = clientRect.top + (clientRect.bottom - clientRect.top) / 2 + 10;                        //xOrg，yOrg为右半部分的中心点坐标
 85         deltaX = deltaY = min((clientRect.right - clientRect.left) / 4, (clientRect.bottom - clientRect.top) / 2) - 50;
 86         xBegin = xOrg + 10;
 87         yBegin = yOrg;
 88         for (i = 0; i < 4; i++)
 89         {
 90             hBrush = CreateSolidBrush(colorIndex[i]);                                            //创建单色的画刷
 91             SelectObject(hDC, hBrush);                                                            //选择画刷
 92             sita = sita + 2 * 3.1415*a[i] / s;
 93             xEnd = xOrg + 10 * cos(sita);
 94             yEnd = yOrg - 10 * sin(sita);                                                        //计算饼图终点的坐标
 95             Pie(hDC, xOrg - deltaX, yOrg - deltaY, xOrg + deltaX, yOrg + deltaY, xBegin, yBegin, xEnd, yEnd);//各部分饼图
 96             xBegin = xEnd;
 97             yBegin = yEnd;                                                                    //下次饼图起点的坐标
 98         }
 99         DeleteObject(hPen);
100         DeleteObject(hBrush);
101         EndPaint(hWnd, &ps);                                                                    //结束绘图
102         break;
103     case WM_SIZE:                                                                                //窗口尺寸发生变化时，应刷新窗口
104         InvalidateRect(hWnd, NULL, true);
105         break;
106     case WM_DESTROY:
107         PostQuitMessage(0);                                                                    //调用PostQuitMessage发出WM_QUIT消息
108         break;
109     default:
110         return DefWindowProc(hWnd, message, wParam, lParam);                                        //默认时采用系统消息默认处理函数
111         break;
112     }
113     return 0;
114 }
115 BOOLEAN InitWindowClass(HINSTANCE hInstance, int nCmdShow)
116 {
117     WNDCLASSEX wcex;
118     HWND hWnd;
119     TCHAR szWindowClass[] = L"窗口示例";
120     TCHAR szTitle[] = L"柱形图及饼图显示数据统计";
121     wcex.cbSize = sizeof(WNDCLASSEX);
122     wcex.style = 0;
123     wcex.lpfnWndProc = WndProc;
124     wcex.cbClsExtra = 0;
125     wcex.cbWndExtra = 0;
126     wcex.hInstance = hInstance;
127     wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
128     wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
129     wcex.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
130     wcex.lpszMenuName = NULL;
131     wcex.lpszClassName = szWindowClass;
132     wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
133     if (!RegisterClassEx(&wcex))
134         return FALSE;
135     hWnd = CreateWindow(
136         szWindowClass,
137         szTitle,
138         WS_OVERLAPPEDWINDOW,
139         CW_USEDEFAULT, CW_USEDEFAULT,
140         CW_USEDEFAULT, CW_USEDEFAULT,
141         NULL,
142         NULL,
143         hInstance,
144         NULL
145         );
146     if (!hWnd)
147         return FALSE;
148     ShowWindow(hWnd, nCmdShow);
149     UpdateWindow(hWnd);
150     return TRUE;
151 }