更新时间:2016-01-07 17:54:35浏览次数:1+次
下面是实现的全选文字的效果图:
if (bIsSelAll)
{
SetBkColor(hdc,RGB(127,227,100));
}
TextOut(hdc,0,0,txt,lstrlen(txt));
我们按下Ctrl+A组合键时就设置布尔变量为true,否则设置为false。字母键的虚拟键码为大写字母的ASCII码。所以只要判断wParam为A的ASCII编码即表示按下了A键。然后判断此时是否按下了Ctrl键,就可以判断是否是组合键Ctrl+A。#include "windows.h"
#include <tchar.h>
TCHAR txt[100]=_T("C++技术网www.cjjjs.com");
// - 项目是Unicode字符集
LRESULT CALLBACK WinProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
static bool bIsSelAll=false;
switch (message)
{
case WM_PAINT:
hdc = BeginPaint(hwnd,&ps);
if (bIsSelAll)
{
SetBkColor(hdc,RGB(127,227,100));
}
TextOut(hdc,0,0,txt,lstrlen(txt));
EndPaint(hwnd,&ps);
return 0;
case WM_KEYDOWN:
{
if (_T('A')==wParam)//字母键的虚拟键码为大写字母的ASCII码
{
int iState = GetKeyState(VK_CONTROL);
if(iState<0)
{
bIsSelAll=true;
}
else
{
bIsSelAll=false;
}
}
InvalidateRect(hwnd,NULL,TRUE);
return 0;
}
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
break;//跳出到默认处理
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrev,LPSTR lpCmd,int iShow)
{
TCHAR ClassName[] = _T("MyClass");
TCHAR title1[] = _T("C++技术网http://www.cjjjs.com");
WNDCLASS wndClass;
wndClass.cbClsExtra=0;
wndClass.cbWndExtra=0;
wndClass.hbrBackground= (HBRUSH)GetStockObject(WHITE_BRUSH);
wndClass.hCursor=LoadCursor(NULL,IDC_HAND);
wndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndClass.hInstance = hInstance;
wndClass.lpfnWndProc = WinProc;
wndClass.lpszClassName = ClassName;
wndClass.lpszMenuName=NULL;
wndClass.style=CS_HREDRAW|CS_VREDRAW;
if(!RegisterClass(&wndClass))return 0;
HWND hwnd = CreateWindow(ClassName,title1,WS_OVERLAPPEDWINDOW,0,0,650,400,NULL,NULL,hInstance,NULL);
ShowWindow(hwnd,SW_SHOWNORMAL);
MSG msg;
while (GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
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