Windows程序设计
最近看Windows程序设计，看到有牛人用原生函数实现哆啦A梦，非常漂亮。但是在个人（Windows10,vs2013）环境中，上述代码存在错误。主要是在SelectObject函数位置。修改错误，并更改配色方案。
可能是SelectObject更新了，直接在SelectObject()中传入1
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4HGDIOBJ SelectObject(
HDC hdc,
HGDIOBJ h
);
当为设备环境选择对象并使用之后，需要还原原始的环境对象，这里有两种方法。
使用SelectObject的返回值
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8HBRUSH hBrush;//要替换的环境对象
HGDIOBJ origin;//保存被替换的原始环境对象，看到过把origin 和hBrush同类型的，但是在windows10,vs2013中，这种定义会报错。
hBrush = CreateSolidBrush(RGB(0,159,232));//具体实例
//绘画过程省略
origin = SelectObject(hdc, hBrush);
//使用hBrush绘画
SelectObject(hdc, origin);//恢复原始环境对象，实际上当被替换的对象是HPEN实例时，将origin声明为HGDIOBJ可行的。使用DeleteObject
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5HBRUSH hBrush;//要替换的环境对象
hBrush = CreateSolidBrush(RGB(0,159,232));//具体实例
//绘画过程省略
DeleteObject(hBrush);
效果与代码
效果图如下
代码下载1
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LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("HelloWin");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(/*GRAY*/WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;
if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("This program requires Windows NT!"),
szAppName, MB_ICONERROR);
return 0;
}
RegisterClass(&wndclass);
hwnd = CreateWindow(szAppName, // window class name
TEXT("The Hello Program"), // window caption
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // initial x position
CW_USEDEFAULT, // initial y position
CW_USEDEFAULT, // initial x size
CW_USEDEFAULT, // initial y size
NULL, // parent window handle
NULL, // window menu handle
hInstance, // program instance handle
NULL); // creation parameters
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
static int cxClient, cyClient;
HBRUSH hBrush;
int i;
POINT apt[NUM],
leftHand[] = {
cxClient / 2 - 60, cyClient / 2 - 20,
cxClient / 2 - 100, cyClient / 2 + 10,
cxClient / 2 - 100, cyClient / 2 + 30,
cxClient / 2 - 60, cyClient / 2 + 10
},
rightHand[] = {
cxClient / 2 + 60, cyClient / 2 - 20,
cxClient / 2 + 100, cyClient / 2 + 10,
cxClient / 2 + 100, cyClient / 2 + 30,
cxClient / 2 + 60, cyClient / 2 + 10
};
switch (message)
{
case WM_SIZE:
cxClient = LOWORD(lParam);
cyClient = HIWORD(lParam) + 120;
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
Ellipse(hdc, cxClient / 2 - 70, cyClient / 2 + 55, cxClient / 2, cyClient / 2 + 85); //脚
Ellipse(hdc, cxClient / 2, cyClient / 2 + 55, cxClient / 2 + 70, cyClient / 2 + 85);
hBrush = CreateSolidBrush(RGB(0,159,232));
SelectObject(hdc, hBrush);
// Rectangle (hdc, cxClient / 2 - 60, cyClient / 2 - 60, cxClient / 2 +60, cyClient / 2 + 70); //身体
RoundRect(hdc, cxClient / 2 - 60, cyClient / 2 - 60, cxClient / 2 + 60, cyClient / 2 + 70, 50, 20);
DeleteObject(hBrush);
SelectObject(hdc, GetStockObject(WHITE_BRUSH));
//肚子部分
Ellipse(hdc, cxClient / 2 - 50, cyClient / 2 - 50, cxClient / 2 + 50, cyClient / 2 + 50);
hBrush = CreateSolidBrush(RGB(0, 159, 232));
SelectObject(hdc, hBrush);
//头部
Ellipse(hdc, cxClient / 2 - 100, cyClient / 2 - 220, cxClient / 2 + 100, cyClient / 2 - 20);
DeleteObject(hBrush);
SelectObject(hdc, GetStockObject(WHITE_BRUSH));
Ellipse(hdc, cxClient / 2 - 85, cyClient / 2 - 170, cxClient / 2 + 85, cyClient / 2 - 20); //脸部
Ellipse(hdc, cxClient / 2 - 40, cyClient / 2 - 190, cxClient / 2, cyClient / 2 - 140); //眼眶左
Ellipse(hdc, cxClient / 2, cyClient / 2 - 190, cxClient / 2 + 40, cyClient / 2 - 140); //眼眶右
SelectObject(hdc, GetStockObject(BLACK_BRUSH));
//眼睛左
Ellipse(hdc, cxClient / 2 - 15, cyClient / 2 - 155, cxClient / 2 - 10, cyClient / 2 - 150);
//眼睛右
Ellipse(hdc, cxClient / 2 + 10, cyClient / 2 - 155, cxClient / 2 + 15, cyClient / 2 - 150);
DeleteObject(hBrush);
hBrush = CreateSolidBrush(RGB(255, 0, 0));
SelectObject(hdc, hBrush);
//鼻子
Ellipse(hdc, cxClient / 2 - 10, cyClient / 2 - 150, cxClient / 2 + 10, cyClient / 2 - 130);
MoveToEx(hdc, cxClient / 2, cyClient / 2 - 130, NULL);
LineTo(hdc, cxClient / 2, cyClient / 2 - 60);
MoveToEx(hdc, cxClient / 2 - 40, cyClient / 2 - 75, NULL); //嘴
for (i = 0; i < NUM / 2; i++)
{
apt[i].x = cxClient / 2 - 40 + i * 160 / NUM;
apt[i].y = cyClient / 2 - 75 + (int)(30 * sin(TWOPI * i / NUM)) / 2;
LineTo(hdc, apt[i].x, apt[i].y);
}
MoveToEx(hdc, cxClient / 2 - 60, cyClient / 2 - 140, NULL); //胡须
LineTo(hdc, cxClient / 2 - 20, cyClient / 2 - 120);
MoveToEx(hdc, cxClient / 2 - 60, cyClient / 2 - 110, NULL);
LineTo(hdc, cxClient / 2 - 20, cyClient / 2 - 110);
MoveToEx(hdc, cxClient / 2 - 60, cyClient / 2 - 80, NULL);
LineTo(hdc, cxClient / 2 - 20, cyClient / 2 - 100);
MoveToEx(hdc, cxClient / 2 + 60, cyClient / 2 - 140, NULL);
LineTo(hdc, cxClient / 2 + 20, cyClient / 2 - 120);
MoveToEx(hdc, cxClient / 2 + 60, cyClient / 2 - 110, NULL);
LineTo(hdc, cxClient / 2 + 20, cyClient / 2 - 110);
MoveToEx(hdc, cxClient / 2 + 60, cyClient / 2 - 80, NULL);
LineTo(hdc, cxClient / 2 + 20, cyClient / 2 - 100);
//口袋
SelectObject(hdc, GetStockObject(WHITE_BRUSH));
Chord(hdc, cxClient / 2 - 40, cyClient / 2 - 40, cxClient / 2 + 40, cyClient / 2 + 40,
cxClient / 2 - 40, cyClient / 2 + 10, cxClient / 2 + 40, cyClient / 2 + 10);
hBrush = CreateSolidBrush(RGB(255, 0, 0)); //脖子上的套圈
SelectObject(hdc, hBrush);
RoundRect(hdc, cxClient / 2 - 70, cyClient / 2 - 40, cxClient / 2 + 70, cyClient / 2 - 20, 20, 20);
DeleteObject(hBrush);
hBrush = CreateSolidBrush(RGB(0, 159, 232)); //手臂
SelectObject(hdc, hBrush);
SetPolyFillMode(hdc, WINDING);
Polygon(hdc, leftHand, 4);
SetPolyFillMode(hdc, WINDING);
Polygon(hdc, rightHand, 4);
DeleteObject(hBrush);
//手
SelectObject(hdc, GetStockObject(WHITE_BRUSH));
Ellipse(hdc, cxClient / 2 - 115, cyClient / 2 + 5, cxClient / 2 - 85, cyClient / 2 + 35);
Ellipse(hdc, cxClient / 2 + 115, cyClient / 2 + 5, cxClient / 2 + 85, cyClient / 2 + 35);
hBrush = CreateSolidBrush(RGB(250, 255, 150)); //铃铛
SelectObject(hdc, hBrush);
Ellipse(hdc, cxClient / 2 - 10, cyClient / 2 - 35, cxClient / 2 + 10, cyClient / 2 - 15);
DeleteObject(hBrush);
SelectObject(hdc, GetStockObject(BLACK_BRUSH));
Ellipse(hdc, cxClient / 2 - 4, cyClient / 2 - 29, cxClient / 2 + 4, cyClient / 2 - 21);
MoveToEx(hdc, cxClient / 2, cyClient / 2 - 25, NULL);
LineTo(hdc, cxClient / 2, cyClient / 2 - 15);
EndPaint(hwnd, &ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
