单线程操做UI会使窗口假死,因此UI操做须要用到多线程多线程
实现效果:当点击kiss时按钮闪动3次函数
原理:自定义一个消息(WM_CHANGE_BUTTON),当点击按钮"kiss"时,启动一个新的线程,线程每隔0.5s钟发送一次WM_CHANGE_BUTTON消息。程序监听到该消息时调用消息函数,改变按钮大小。spa
一、在界面上添加一个按钮修改ID为 IDC_KISS .net
二、ctrl+shift+x,建立类向导中的消息机制线程
三、定义事件函数code
#define WM_CHANGE_BUTTON WM_USER+1 #define SLEEP_TIMES 200 void Change(LPVOID pParam) {//下面的消息使得按钮闪烁三次 ::SendMessageA(AfxGetThread()->m_pMainWnd->m_hWnd, WM_CHANGE_BUTTON, 0, (LPARAM)pParam); Sleep(SLEEP_TIMES); ::SendMessageA(AfxGetThread()->m_pMainWnd->m_hWnd, WM_CHANGE_BUTTON, 1, (LPARAM)pParam); Sleep(SLEEP_TIMES); ::SendMessageA(AfxGetThread()->m_pMainWnd->m_hWnd, WM_CHANGE_BUTTON, 0, (LPARAM)pParam); Sleep(SLEEP_TIMES); ::SendMessageA(AfxGetThread()->m_pMainWnd->m_hWnd, WM_CHANGE_BUTTON, 1, (LPARAM)pParam); Sleep(SLEEP_TIMES); ::SendMessageA(AfxGetThread()->m_pMainWnd->m_hWnd, WM_CHANGE_BUTTON, 0, (LPARAM)pParam); Sleep(SLEEP_TIMES); ::SendMessageA(AfxGetThread()->m_pMainWnd->m_hWnd, WM_CHANGE_BUTTON, 1, (LPARAM)pParam); Sleep(SLEEP_TIMES); }
四、定义按钮事件blog
afx_msg LRESULT CMFCThreadButtonTest1Dlg::OnChangeButton(WPARAM wParam, LPARAM lParam) { CButton *pBtn = (CButton*)GetDlgItem((int)lParam); int x = 100; int y = 80; CRect rect; pBtn->GetWindowRect(&rect); //上面的函数获取的是按钮相对于整个屏幕的坐标,须要用下面这个函数 //转化为相对于父窗口的坐标 ScreenToClient(&rect); //改变CRect并从新赋值给button if(wParam) { rect.left-=5; rect.top-=5; rect.bottom+=5; rect.right+=5; } else { rect.left+=5; rect.top+=5; rect.bottom-=5; rect.right-=5; } //MoveWindow不单单是“移动”他还能够改变窗口大小 pBtn->MoveWindow(&rect); return 0; } void CMFCThreadButtonTest1Dlg::OnBnClickedKiss() { // TODO: 在此添加控件通知处理程序代码 AfxBeginThread((AFX_THREADPROC)Change,(LPVOID)IDC_KISS,0,0,0,0); }
参考来源事件