【Windows编程——API】简单按键指令识别
作者：互联网
//windows.h文件中包含应用程序中所需的数据类型和数据结构的定义
#include <windows.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
#define PI acos(-1)
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);//窗口函数说明
//---------以下初始化窗口类--------------
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInst,LPSTR lpszCmdLine,int nCmdShow)
{
HWND hwnd;
MSG Msg;
WNDCLASS wndclass;
char lpszClassName[] = "窗口"; //窗口类名
char lpszTitle[] = "My_Windows"; //窗口标题名
//窗口类的定义
wndclass.style = CS_HREDRAW | CS_VREDRAW; //窗口类型为默认类型
wndclass.lpfnWndProc = WndProc; //窗口处理函数为WndProc
wndclass.cbClsExtra = 0; //窗口类无扩展
wndclass.cbWndExtra = 0; //窗口实例无扩展
wndclass.hInstance = hInstance; //当前实例句柄
wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION);//窗口的最小化图标为默认图标
wndclass.hCursor = LoadCursor( NULL, IDC_ARROW); //窗口 采用箭头光标
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); //窗口 背景为 白色
wndclass.lpszMenuName = NULL ; //窗口 中无菜单
wndclass.lpszClassName = lpszClassName; //窗口类名为“窗口示例”
//-----------以下进行窗口类的注册
if (!RegisterClass(&wndclass))//如果注册失败则发出警吿声音
{
MessageBeep (0);
return FALSE;
}
//创建窗口
hwnd = CreateWindow(
lpszClassName, //窗口类名
lpszTitle, //窗口实例的标题名
WS_OVERLAPPEDWINDOW, //窗口 的风格
CW_USEDEFAULT,
CW_USEDEFAULT, //窗口左上角坐标为默认值
CW_USEDEFAULT,
CW_USEDEFAULT, //窗口的髙和宽为默认值
NULL, //此窗口无父窗口
NULL, //此窗口无主菜单
hInstance, //创建此窗口应用程序的当前句柄
NULL //不使用该值
);
ShowWindow( hwnd, nCmdShow); //显示窗口
UpdateWindow(hwnd); //绘制用户区
while( GetMessage(&Msg, NULL, 0, 0)) //消息循环
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}
return Msg.wParam; //程序终止时将信息返回系统
}
//窗口函数
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hDC, hdc_old;
HBITMAP hBmp;
RECT rect;
HBRUSH hBrush;
PAINTSTRUCT Ps;
TEXTMETRIC tm;
HFONT hf;
HPEN hPen;
SIZE Sz;
COLORREF color[7] = {RGB(255,0,0), RGB(255,165,0), RGB(255,255,0), RGB(0,255,0), RGB(0,255,255), RGB(0,0,255), RGB(139,0,255)};
static bool isshift = false, isctrl = false, isctrlR = false, isshiftB = false, isup = false, isR = false, isG = false, isB = false;
char *textbuf[] = {
"您按下了UP键",
"您按下了CTRL键"
};
HBITMAP hBkBmp;
int i;
switch (message)
{
case WM_KEYDOWN:
{
switch (wParam)
{
case VK_UP:
isup = true;
break;
case VK_SHIFT:
isshift = true;
break;
case VK_CONTROL:
isctrl = true;
break;
default:
break;
}
}
return 0;
case WM_KEYUP:
InvalidateRect(hWnd, NULL, 1);
return 0;
case WM_ERASEBKGND:
return 1;
case WM_CHAR:
if (GetAsyncKeyState(VK_CONTROL)&&GetAsyncKeyState('R'))
{
if (isctrl == true)
{
isctrlR = true;
isctrl = false;
}
}
else if (GetAsyncKeyState(VK_SHIFT)&&GetAsyncKeyState('B'))
{
if (isshift)
{
isshift = false;
isshiftB = true;
}
}
else if (GetAsyncKeyState('B'))
{
isB = true;
}
else if (GetAsyncKeyState('R'))
{
isR = true;
}
else if (GetAsyncKeyState('G'))
{
isG = true;
}
return 0;
case WM_PAINT:
hDC = BeginPaint(hWnd, &Ps);
// hdc_old = BeginPaint(hWnd, &Ps);
// hDC = CreateCompatibleDC(hdc_old);
GetClientRect(hWnd,&rect);
// hBmp = CreateCompatibleBitmap(hdc_old,rect.right,rect.bottom);
// SelectObject(hDC,hBmp);
if (isup)
{
hPen = CreatePen(PS_SOLID, 1, RGB(255,255,255));
hBrush = CreateSolidBrush(RGB(255,255,255));
SelectObject(hDC, hBrush);
SelectObject(hDC, hPen);
Rectangle(hDC, rect.left, rect.top, rect.right, rect.bottom);
DrawText(hDC, textbuf[0], -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
isup = false;
}
else if (isctrlR)
{
hPen = CreatePen(PS_SOLID, 1, color[1]);
hBrush = CreateSolidBrush(color[1]);
SelectObject(hDC, hBrush);
SelectObject(hDC, hPen);
Rectangle(hDC, rect.left, rect.top, rect.right, rect.bottom);
isctrlR = false;
}
else if (isctrl)
{
hPen = CreatePen(PS_SOLID, 1, RGB(255,255,255));
hBrush = CreateSolidBrush(RGB(255,255,255));
SelectObject(hDC, hBrush);
SelectObject(hDC, hPen);
Rectangle(hDC, rect.left, rect.top, rect.right, rect.bottom);
DrawText(hDC, textbuf[1], -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
isctrl = false;
}
else if (isshiftB)
{
hPen = CreatePen(PS_SOLID, 1, color[6]);
hBrush = CreateSolidBrush(color[6]);
SelectObject(hDC, hBrush);
SelectObject(hDC, hPen);
Rectangle(hDC, rect.left, rect.top, rect.right, rect.bottom);
isshiftB = false;
}
else if (isR)
{
hPen = CreatePen(PS_SOLID, 1, color[0]);
hBrush = CreateSolidBrush(color[0]);
SelectObject(hDC, hBrush);
SelectObject(hDC, hPen);
Rectangle(hDC, rect.left, rect.top, rect.right, rect.bottom);
isR = false;
}
else if (isG)
{
hPen = CreatePen(PS_SOLID, 1, color[3]);
hBrush = CreateSolidBrush(color[3]);
SelectObject(hDC, hBrush);
SelectObject(hDC, hPen);
Rectangle(hDC, rect.left, rect.top, rect.right, rect.bottom);
isG = false;
}
else if (isB)
{
hPen = CreatePen(PS_SOLID, 1, color[5]);
hBrush = CreateSolidBrush(color[5]);
SelectObject(hDC, hBrush);
SelectObject(hDC, hPen);
Rectangle(hDC, rect.left, rect.top, rect.right, rect.bottom);
isB = false;
}
// BitBlt(hdc_old,0,0,rect.right,rect.bottom,hDC,0,0,SRCCOPY);
// DeleteObject(hBmp);
DeleteObject(hBrush);
DeleteObject(hPen);
// DeleteDC(hDC);
ReleaseDC(hWnd, hDC); //释放
EndPaint(hWnd, &Ps); //结束缓制
return 0;
case WM_DESTROY:
PostQuitMessage(0); //调用 PostQuitMessage 发出 WM_QUIT 消息
return 0;
default:
return DefWindowProc(hWnd, message, wParam, lParam); //默认时采用系统消息默认处理函数
}
}
标签：窗口,Windows,编程,API,hDC,false,hPen,rect,255 来源： https://www.cnblogs.com/Vikyanite/p/12639025.html