窗口全屏显示与还原--上位机VC - 工控编程吧

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窗口全屏显示与还原--上位机VC
功能展示
VC6具有窗口全屏显示方便进行资源的编辑功能，我们当前例程也实现窗口全屏显示与还原功能，效果如图，当前是基于对话框的全屏效果，点击按钮，窗口全屏显示，再次点击，窗口还原到原先位置
要点提示

窗口全屏显示可以调用函数 SetWindowPlacement ()实现，为了可以还原窗口原先位置与大小，例程在全屏前利用函数GetWindowPlacement()保存了窗口的位置信息，还原时再次调用函数SetWindowPlacement()进行还原；

实现功能

1.新建基于对话框的应用程序

2.添加变量BOOL m_bFullScreen;//标识全屏与否 WINDOWPLACEMENT m_wpPrev;//保存正常状态窗口位置信息 CRect m_FullScreenWindowRect; 并初始化 m_bFullScreen=FALSE;

3.添加按钮<窗口全屏/还原>关联点击函数

void CGkbc8Dlg::OnButton1()
{
RECT rectDesktop;
WINDOWPLACEMENT wpNew;
if (!m_bFullScreen)
{
GetWindowPlacement (&m_wpPrev);// We'll need these to restore the original state.
m_wpPrev.length = sizeof(m_wpPrev);
//Adjust RECT to new size of window
::GetWindowRect ( ::GetDesktopWindow(), &rectDesktop );
::AdjustWindowRectEx(&rectDesktop, GetStyle(), TRUE, GetExStyle());
m_FullScreenWindowRect = rectDesktop;// Remember this for OnGetMinMaxInfo()
wpNew = m_wpPrev;
wpNew.showCmd = SW_SHOWNORMAL;
wpNew.rcNormalPosition = rectDesktop;
m_bFullScreen=TRUE;
}
else
{
m_bFullScreen=FALSE;
wpNew = m_wpPrev;
}
SetWindowPlacement ( &wpNew );//还原窗口位置
}

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4.添加OnGetMinMaxInfo()还可以添加鼠标点击函数实现拖动窗口

void CGkbc8Dlg::OnLButtonDown(UINT nFlags, CPoint point)
{
if(!m_bFullScreen)PostMessage(WM_NCLBUTTONDOWN,HTCAPTION,0);
CDialog::OnLButtonDown(nFlags, point);
}
void CGkbc8Dlg::OnGetMinMaxInfo(MINMAXINFO FAR* lpMMI)
{
if (m_bFullScreen)
{
lpMMI->ptMaxSize.y = m_FullScreenWindowRect.Height();
lpMMI->ptMaxTrackSize.y = lpMMI->ptMaxSize.y;
lpMMI->ptMaxSize.x = m_FullScreenWindowRect.Width();
lpMMI->ptMaxTrackSize.x = lpMMI->ptMaxSize.x;
}
CDialog::OnGetMinMaxInfo(lpMMI);
}

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我们来演示下功能实现的整个过程

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