View 如何拆分带有3个视图的MFC对话框？

问题：如何将MFC对话框拆分为3个视图？
环境：Win10 RS5 x64
工具：VisualStudio10.0+Sp1

当我执行应用程序时，出现了“调试断言失败！”错误

错误消息：

Debug Assertion Failed!  
File: f:\dd\vctools\vc7libs\ship\atlmfc\include\afxwin2.inl  
Line: 82

// SampleDlg.h
class CSampleDlg : public CDialogEx
{
    //...
public:
    CSplitterWndEx m_wndSplitter;
};

// SampleDlg.cpp
BOOL CSampleDlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();
    //...
    if (!m_wndSplitter.CreateStatic(this, 2, 1))
    {
        return FALSE;
    }
    if (!m_wndSplitter.CreateView(0, 0, RUNTIME_CLASS(CChild_NoteView), CSize(100, 100), 0) ||
        !m_wndSplitter.CreateView(1, 0, RUNTIME_CLASS(CChild_LogView), CSize(100, 100), 0))
    {
        m_wndSplitter.DestroyWindow();
        return FALSE;
    }

    return TRUE;
}

// Child_NoteView.h
class CChild_NoteView : public CView
{
    DECLARE_DYNCREATE(CChild_NoteView)
    //...
public:
    CFont           m_note_font;
    CRichEditCtrl   m_note_edit;
}

// Child_NoteView.cpp
Message : WM_CREATE
int CChild_NoteView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if(CView::OnCreate(lpCreateStruct) == -1)
        return -1;

    CreateNoteEdit();

    return 0;
}
VOID CChild_NoteView::CreateNoteEdit()
{
    m_note_font.CreatePointFont(80, L"Consolas");
    m_note_edit.Create(ES_MULTILINE | WS_CHILD | WS_VISIBLE | WS_TABSTOP | WS_VSCROLL | WS_HSCROLL, 
        CRect(10, 10, 100, 100), this, IDD_EDIT_NOTE);
    m_note_edit.SetReadOnly(TRUE);

    m_note_edit.SetFont(&m_note_font, 1);

    return VOID();
}

我想像这样拆分对话框：

Debug Assertion Failed!  
File: f:\dd\vctools\vc7libs\ship\atlmfc\include\afxwin2.inl  
Line: 82

// SampleDlg.h
class CSampleDlg : public CDialogEx
{
    //...
public:
    CSplitterWndEx m_wndSplitter;
};

// SampleDlg.cpp
BOOL CSampleDlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();
    //...
    if (!m_wndSplitter.CreateStatic(this, 2, 1))
    {
        return FALSE;
    }
    if (!m_wndSplitter.CreateView(0, 0, RUNTIME_CLASS(CChild_NoteView), CSize(100, 100), 0) ||
        !m_wndSplitter.CreateView(1, 0, RUNTIME_CLASS(CChild_LogView), CSize(100, 100), 0))
    {
        m_wndSplitter.DestroyWindow();
        return FALSE;
    }

    return TRUE;
}

// Child_NoteView.h
class CChild_NoteView : public CView
{
    DECLARE_DYNCREATE(CChild_NoteView)
    //...
public:
    CFont           m_note_font;
    CRichEditCtrl   m_note_edit;
}

// Child_NoteView.cpp
Message : WM_CREATE
int CChild_NoteView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if(CView::OnCreate(lpCreateStruct) == -1)
        return -1;

    CreateNoteEdit();

    return 0;
}
VOID CChild_NoteView::CreateNoteEdit()
{
    m_note_font.CreatePointFont(80, L"Consolas");
    m_note_edit.Create(ES_MULTILINE | WS_CHILD | WS_VISIBLE | WS_TABSTOP | WS_VSCROLL | WS_HSCROLL, 
        CRect(10, 10, 100, 100), this, IDD_EDIT_NOTE);
    m_note_edit.SetReadOnly(TRUE);

    m_note_edit.SetFont(&m_note_font, 1);

    return VOID();
}

此处的实现代码：

Debug Assertion Failed!  
File: f:\dd\vctools\vc7libs\ship\atlmfc\include\afxwin2.inl  
Line: 82

// SampleDlg.h
class CSampleDlg : public CDialogEx
{
    //...
public:
    CSplitterWndEx m_wndSplitter;
};

// SampleDlg.cpp
BOOL CSampleDlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();
    //...
    if (!m_wndSplitter.CreateStatic(this, 2, 1))
    {
        return FALSE;
    }
    if (!m_wndSplitter.CreateView(0, 0, RUNTIME_CLASS(CChild_NoteView), CSize(100, 100), 0) ||
        !m_wndSplitter.CreateView(1, 0, RUNTIME_CLASS(CChild_LogView), CSize(100, 100), 0))
    {
        m_wndSplitter.DestroyWindow();
        return FALSE;
    }

    return TRUE;
}

// Child_NoteView.h
class CChild_NoteView : public CView
{
    DECLARE_DYNCREATE(CChild_NoteView)
    //...
public:
    CFont           m_note_font;
    CRichEditCtrl   m_note_edit;
}

// Child_NoteView.cpp
Message : WM_CREATE
int CChild_NoteView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if(CView::OnCreate(lpCreateStruct) == -1)
        return -1;

    CreateNoteEdit();

    return 0;
}
VOID CChild_NoteView::CreateNoteEdit()
{
    m_note_font.CreatePointFont(80, L"Consolas");
    m_note_edit.Create(ES_MULTILINE | WS_CHILD | WS_VISIBLE | WS_TABSTOP | WS_VSCROLL | WS_HSCROLL, 
        CRect(10, 10, 100, 100), this, IDD_EDIT_NOTE);
    m_note_edit.SetReadOnly(TRUE);

    m_note_edit.SetFont(&m_note_font, 1);

    return VOID();
}

我认为当我尝试创建空视图时会发生此错误。

---

因此，我实现了note edit，但仍然发生相同的错误。

当您出现这些调试错误时，调试器应该为您提供查看源代码的选项（但较旧版本的Visual Studio可能会给您带来困难）。然后可以打开“调用堆栈”窗口并跟踪错误

在本例中，调试器可能会告诉您，

csplitterwendex

正在查找

CFrameWnd

，但找不到它

您可以派生自己的类

CMySplitterWndEx

，并更改代码以返回主对话框，而不是返回

CFrameWnd

或者，您可以按如下方式添加假帧窗口：

BOOL CSampleDlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();

    CRect rc;
    GetClientRect(&rc);

    CFrameWnd *frame = new CFrameWnd;
    CString framecls = AfxRegisterWndClass(0, NULL, NULL, NULL);
    frame->Create(framecls, L"", WS_VISIBLE | WS_CHILD, rc, this);

    m_wndSplitter.CreateStatic(frame, 2, 1);
    m_wndSplitter.CreateView(0, 0, RUNTIME_CLASS(CChild_NoteView), CSize(100, 100), NULL);
    m_wndSplitter.CreateView(1, 0, RUNTIME_CLASS(CChild_NoteView), CSize(100, 100), NULL);

    rc.MoveToXY(0, 0);
    m_wndSplitter.MoveWindow(rc);
    m_wndSplitter.ShowWindow(SW_SHOW);
    return TRUE;
}

您可能还需要添加

CCreateContext