#include <windows.h>
#include <math.h>
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
#define PI 3.1415926
#define NUM 1000
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine,
int nShowCmd)
{
//声明全局数据：类名
static TCHAR szClassName[] = TEXT(
"MyWindows");
HWND hwnd;
MSG msg;
//注册窗口类
WNDCLASS wndclass;
wndclass.hInstance =
hInstance;
wndclass.lpszClassName =
szClassName;
wndclass.cbClsExtra =
0;
wndclass.cbWndExtra =
0;
wndclass.lpfnWndProc =
WndProc;
wndclass.lpszMenuName =
NULL;
wndclass.hIcon =
LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor =
LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground =
(HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.style =
CS_HREDRAW;
if (!RegisterClass(&
wndclass))
{
MessageBox(NULL, TEXT("this program must run in Windows NT!"), szClassName, MB_ICONERROR);
return 0;
}
hwnd =
CreateWindow(
szClassName,
TEXT("MyFirstPractice"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL
);
ShowWindow(hwnd, nShowCmd);
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;
RECT rect;
int i;
static int padding;
static int xCount, yCount;
//线条数
static int xClient, yClient;
//窗口大小
switch (message)
{
case WM_CREATE:
padding =
50;
break;
case WM_SIZE:
xClient =
LOWORD(lParam);
yClient =
HIWORD(lParam);
xCount = xClient / padding -
1;
yCount = yClient / padding -
1;
break;
case WM_PAINT:
hdc = BeginPaint(hwnd, &
ps);
GetClientRect(hwnd, &
rect);
//1 //画点
// for (i = rect.left; i < rect.right;i++)
// {
// //画像素点--->成线
// //setpixel返回的是个颜色rgb,因为系统有时候会自动用相近颜色替换，效率不高
// //setpixelv返回bool类型，效率更高
// //但是当用这些函数绘制图形，会快速出入栈，效率不高
// SetPixel(hdc, i, 100, RGB(255, 0, 0));
// }
//2 //画线
//movetoex将当前绘图位置移动到某个具体的点，可以获得之前的位置坐标
// POINT pt;
// MoveToEx(hdc, 100, 50, &pt); //默认起点是左上角
// //LineTo(hdc, pt.x, pt.y);
// LineTo(hdc, 150, 100);
// LineTo(hdc, 300, 400);
//
// //getcurrentpositionex获取当前绘图点坐标
// GetCurrentPositionEx(hdc, &pt);
//3 //绘制一个网格
//先绘制上到下
//获取线条数量
// for (i = 1; i <= xCount;i++)
// {
// MoveToEx(hdc, i*padding, 0, NULL);
// LineTo(hdc, i*padding, yClient);
// }
//
// //再绘制左到右
// for (i = 1; i <= yCount;i++)
// {
// MoveToEx(hdc, 0, i*padding, NULL);
// LineTo(hdc, xClient, i*padding);
// }
//4 //绘制网格2
//rect就是客户区矩形......
// for (int x = 0; x < rect.right;x+=50)
// {
// MoveToEx(hdc, x, 0, NULL);
// LineTo(hdc, x, rect.bottom);
// }
//
// for (int x = 0; x < rect.bottom; x += 50)
// {
// MoveToEx(hdc, 0, x, NULL);
// LineTo(hdc, rect.right, x);
// }
//5. //画一个五角星
// MoveToEx(hdc, 30, 10,NULL);
// LineTo(hdc, 20, 50);
// LineTo(hdc, 50, 20);
// LineTo(hdc, 10, 20);
// LineTo(hdc, 40, 50);
// LineTo(hdc, 30, 10);
//6. //折线绘制五角星
// POINT apt[] = { 30, 10, 20, 50, 50, 20, 10, 20, 40, 50, 30, 10 };
// Polyline(hdc, apt, 6);
// PolylineTo(hdc, apt, 6); //会重当前位置为起点开始向顶点绘制
//7. //同时绘制多个图像
// POINT apt2[] = {
// 30, 10, 20, 50, 50, 20, 10, 20, 40, 50, 30, 10, //五角星
// 120, 120, 180, 120, 120, 180,120,120, //直角三角形
// 300, 300, 300, 400, 400, 400, 400, 300,300,300 //矩形
// };
// DWORD count[] = { 6, 4, 5 };
// PolyPolyline(hdc, apt2, count, 3);;
// MoveToEx(hdc, 100, 100, NULL);
// LineTo(hdc, 500, 100);
//8. //绘制sin曲线
// POINT apt3[400];
// double x, y,rad;
// for (int i = 0; i < 400;i+=1)
// {
// x = i;
// rad = PI / 180.0 * (360.0 / 400.0)*i;
// y = sin(rad);
//
// apt3[i].x = x+100;
// apt3[i].y = y*100+100;
// }
// Polyline(hdc, apt3, 400);
//9. //h绘制sin曲线，规范
POINT apt4[NUM];
MoveToEx(hdc, 0, yClient /
2, NULL);
LineTo(hdc, xClient, yClient /
2);
for (
int j =
0; j < NUM;j++
)
{
apt4[j].x = j*xClient/
NUM;
apt4[j].y = (
int)((
1 - sin(PI *
2 / NUM*j)) /
2 *
yClient);
}
Polyline(hdc, apt4, NUM);
DrawText(hdc, L"this is my first pragram win32", -
1, &rect, DT_CENTER | DT_VCENTER |
DT_SINGLELINE);
break;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
转载于:https://www.cnblogs.com/ssyfj/p/8506078.html
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