更新时间:2015-12-06 16:06:06浏览次数:1+次
而我们在直接想用GetWindowDC获得的窗口DC在窗口标题上输出文字,就是直接在WM_PAINT消息或者其他鼠标单击消息等处理,而却没有达到想要的效果。实际上,可能是书中忽略了一点,或者是你在看书时忽略了一点。不过我比较偏向于书上没有说清楚。
#include "windows.h"
#include <tchar.h>
// - 项目是Unicode字符集
LRESULT CALLBACK WinProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
RECT rect,rectTitle,rectClient;
static TCHAR str[]=_T("C++技术网http://www.cjjjs.com");
static int i=0;
static TCHAR ch;
switch (message)
{
case WM_PAINT:
BeginPaint(hwnd,&ps);// - 不能去掉,不然会闪烁
hdc = GetWindowDC(hwnd);
// - 填充整个窗口非客户区
GetWindowRect(hwnd,&rect);
FillRect(hdc,&rect,(HBRUSH)GetStockObject(LTGRAY_BRUSH));
// - 填充窗口的标题栏
GetClientRect(hwnd,&rectClient);
rect.bottom = rect.bottom-rectClient.bottom-(rect.right-rectClient.right)/2;
FillRect(hdc,&rect,(HBRUSH)GetStockObject(GRAY_BRUSH));
// - 在标题栏上输出文字
rect.top+=20;// - 调节输出的文字的起始y坐标
rect.left+=40;
SetBkMode(hdc,TRANSPARENT);// - 去掉文字背景
SetTextColor(hdc,RGB(255,255,0));// - 设置文字颜色
DrawText(hdc,_T("C++技术网www.cjjjs.com 提醒您,这里是窗口标题区"),-1,&rect,DT_SINGLELINE);
ReleaseDC(hwnd,hdc);
EndPaint(hwnd,&ps);
return 0;
case WM_NCPAINT:
//hdc = GetWindowDC(hwnd);
//GetWindowRect(hwnd,&rect);
//FillRect(hdc,&rect,(HBRUSH)GetStockObject(LTGRAY_BRUSH));
//GetClientRect(hwnd,&rectClient);
//rect.bottom = rect.bottom-rectClient.bottom-(rect.right-rectClient.right)/2;
//FillRect(hdc,&rect,(HBRUSH)GetStockObject(GRAY_BRUSH));
//rect.top+=20;
//rect.left+=40;
//SetBkMode(hdc,TRANSPARENT);
//SetTextColor(hdc,RGB(255,255,0));
//DrawText(hdc,_T("C++技术网www.cjjjs.com 提醒您,这里是窗口标题区"),-1,&rect,DT_SINGLELINE);
//ReleaseDC(hwnd,hdc);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
}
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrev,LPSTR lpCmd,int iShow)
{
TCHAR ClassName[] = _T("MyClass");
TCHAR title1[] = _T("原始标题");
WNDCLASS wndClass;
wndClass.cbClsExtra=0;
wndClass.cbWndExtra=0;
wndClass.hbrBackground= (HBRUSH)GetStockObject(GRAY_BRUSH);
wndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
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,0,0,440,400,NULL,NULL,hInstance,NULL);
ShowWindow(hwnd,SW_SHOWNORMAL);
MSG msg;
while (GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
代码的WM_PAINT和WM_NCPAINT一次只执行一个哦。相关资讯