在MFC中保存窗口大小的位置和状态 [英] Saving a windows size position and state in MFC

问题描述

如果我调出GUI，然后调整大小并关闭它，当我再次启动它时它会恢复原来的大小。

它应该记住旧值



我尝试了什么：



以下方法将在关闭GUI时启动它会写出大小

void CMainFrame :: OnDestroy（）

{

m_bShuttingDown = true;



WINDOWPLACEMENT wp;

GetWindowPlacement（& wp）;

AfxGetApp（） - > WriteProfileBinary（_T（MainFrame），_ T（ WP），（LPBYTE）& wp，sizeof（wp））;

CFrameWndEx :: OnDestroy（）;

}



以下方法将在加载GUI时调用

If I bring up the GUI, and then I resize and close it, when I start it up again it reverts back to the original size.
it should remember the old values

What I have tried:

the below method will get intiate while closing GUI and it will write the size
void CMainFrame::OnDestroy()
{
m_bShuttingDown = true;

WINDOWPLACEMENT wp;
GetWindowPlacement(&wp);
AfxGetApp()->WriteProfileBinary(_T("MainFrame"), _T("WP"), (LPBYTE)&wp, sizeof(wp));
CFrameWndEx::OnDestroy();
}

the below method will get call while loading GUI

oid CMainFrame::OnShowWindow(BOOL bShow, UINT nStatus)
{
    CFrameWndEx::OnShowWindow(bShow, nStatus);

    if (bShow && !IsWindowVisible()) //The formal parameter bShow is true when the window is about to be shown, 
                                        //and false when it is about to be hidden
       
    {
       
        WINDOWPLACEMENT *lwp;
        UINT nl;
     
        if (AfxGetApp()->GetProfileBinary(_T("MainFrame"), _T("WP"), (LPBYTE*)&lwp, &nl))
        {
            SetWindowPlacement(lwp);           
           
            UpdateWindow();
            delete[] lwp;
        }
}the above method its returning old values but gui is positioning as per that values
could you please tell me if anything is wrong here

推荐答案

看起来您使用了CodeProject文章中的代码在MFC中保存窗口大小的位置和状态 [ ^ ]但未完全阅读。



OnShowWindow 也可能在程序执行期间被调用，但您可能希望仅在程序启动时调用它。文章提到并使用状态变量 bOnce 提供代码，仅在第一次调用 OnShowWindow 时设置位置。





将展示位置保存在 CMainFrame中:: OnClose 而不是 OnDestroy 。



在<$ c中设置展示位置$ c> CMainFrame :: OnCreate 而不是 OnShowWindow 。但是，这将只设置位置，并且稍后从 InitInstance 调用 ShowWindow 时需要该命令传递存储：

It looks like you have used the code from the CodeProject article Saving a windows size position and state in MFC[^] but did not read it completely.

OnShowWindow might be also called during program execution but you probably want it to be called only at program start. The article mentions that and provides code using the state variable bOnce to set the placement only when OnShowWindow is called the first time.


Save the placement in CMainFrame::OnClose instead of OnDestroy.

Set the placement in CMainFrame::OnCreate instead of OnShowWindow. However, this will set only the position and the size will be set later when calling ShowWindow from InitInstance requiring that the command is passed stored:

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    // ... (call OnCreate of base class)
    
    WINDOWPLACEMENT *lwp;
    UINT nl;
    if (AfxGetApp()->GetProfileBinary(_T("MainFrame"), _T("WP"), (LPBYTE*)&lwp, &nl))
    {    
        // save show state
        m_nCmdShow = lwp->showCmd;
        // must set this to normal here
        lwp->showCmd = SW_SHOWNORMAL;
        SetWindowPlacement(lwp);
        delete[] lwp;
    }
    
    // ...
}

// To be called from InitInstance()
void CMainFrame::ShowWindowInitial()
{
    ShowWindow(m_nCmdShow);
    UpdateWindow();
}

BOOL CMyApp::InitInstance()
{
    // ...
    //CMainFrame pMainFrame = new CMainFrame;
    pMainFrame->ShowWindowInitial();
    // ...
}

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