上位机MFC实现视窗分割 - 工控编程吧

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这里在单文档工程中，通过分割视窗来实现显示不同的内容。效果如图
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界面为一个SDI窗口，主框架窗口由一个静态的一行二列的分隔器窗口组成。
左列CLeftPaneView派生于CFormView，
右列CRightPaneFrame派生于CFrameWnd。

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext*
pContext)
{
// TODO: Add your specialized code here and/or call the base class
if (!m_wndSplitter.CreateStatic(this, 1, 2))
{
TRACE0("Failed to create splitter window\n");
return FALSE;
}

// Get the client rect first for calc left pane size
CRect rect;
GetClientRect(&rect);

// create the left tree view first.
if (!m_wndSplitter.CreateView(0, 0, RUNTIME_CLASS(CLeftPaneView),
CSize(rect.Width()/3, 0), pContext))
{
TRACE0("Failed to create left pane view\n");
return FALSE;
}

// The right pane is a frame which and contain several different views.
// The is can be set to active or non-active
if (!m_wndSplitter.CreateView(0, 1, RUNTIME_CLASS(CRightPaneFrame),
CSize(0, 0), pContext))
{
TRACE0("Failed to create right pane frame\n");
return FALSE;
}

// Set the left pane as the active view
SetActiveView((CView*) m_wndSplitter.GetPane(0, 0));

return TRUE;
}

既然右边窗格是一个框架窗口，它可以创建CView的派生类，比如CFromView。
左边窗格是一个CFormView派生类，其中包含一个树视控件。
右边窗格OnCreateClient创建所有不同的视，并设置活动视。
同时，右边窗格的视也可以是分隔器窗口。

BOOL CRightPaneFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext*
pContext)
{
// TODO: Add your specialized code here and/or call the base class

m_pSplitterView = new CSplitterView;
m_pSplitterView->Create(NULL, NULL, 0L, CFrameWnd::rectDefault, this,
VIEW_SPLITTER, pContext);
SetActiveView(m_pSplitterView);
m_pSplitterView->ShowWindow(SW_SHOW);
m_pSplitterView->SetDlgCtrlID(AFX_IDW_PANE_FIRST);

m_pListCtrlView = new CListCtrlView;
((CView*) m_pListCtrlView)->Create(NULL, NULL, 0L, CFrameWnd::rectDefault,
this, VIEW_LISTCTRL, pContext);
m_pListCtrlView->ShowWindow(SW_HIDE);
m_pListCtrlView->SetDlgCtrlID(VIEW_LISTCTRL);

m_pEditView = new CEditView;
m_pEditView->Create(NULL, NULL, 0L, CFrameWnd::rectDefault, this,
VIEW_EDIT, pContext);
m_pEditView->ShowWindow(SW_HIDE);
m_pEditView->SetDlgCtrlID(VIEW_EDIT);

RecalcLayout();

return TRUE;
}

右边窗格的OnCreateClient必须返回TRUE，并调用RecalcLayout()。
当选择左边窗格的一个项目时，左边窗格调用右边窗格的成员SwithToView：

void CRightPaneFrame::SwitchToView(UINT nView)
{
CView* pOldActiveView = GetActiveView();
CView* pNewActiveView;

switch (nView)
{
case VIEW_SPLITTER:
pNewActiveView = (CView*) m_pSplitterView;
break;

case VIEW_LISTCTRL:
pNewActiveView = (CView*) m_pListCtrlView;
break;

case VIEW_EDIT:
pNewActiveView = (CView*) m_pEditView;
break;
}

// don't switch when views are the same
if (pOldActiveView == pNewActiveView) return;

SetActiveView(pNewActiveView);
pNewActiveView->ShowWindow(SW_SHOW);
pNewActiveView->SetDlgCtrlID(AFX_IDW_PANE_FIRST);
pOldActiveView->ShowWindow(SW_HIDE);
pOldActiveView->SetDlgCtrlID(m_nCurrentViewID);
m_nCurrentViewID = nView;

RecalcLayout();
}

切换代码非常讲究技巧，它隐藏了所有老的活动视，显示新的活动视，并设置当前窗口控件ID。
最后，左边窗格树视选择需要调用右边窗格的切换函数。

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext*
pContext)
{
.
.
.
CLeftPaneView* pLeftPaneView = (CLeftPaneView*)
m_wndSplitter.GetPane(0,0);
pLeftPaneView->m_pRightPaneFrame = (CRightPaneFrame*)
m_wndSplitter.GetPane(0,1);
.
.
.
}

void CLeftPaneView::OnSelchangedTree(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;
// TODO: Add your control notification handler code here

UINT nView = 0;
HTREEITEM hSelectedItem = m_treeCtrl.GetSelectedItem();

if (hSelectedItem == m_hSplitterView)
nView = VIEW_SPLITTER;
else
if (hSelectedItem == m_hListCtrlView)
nView = VIEW_LISTCTRL;
else
if (hSelectedItem == m_hEditView)
nView = VIEW_EDIT;

if (nView) m_pRightPaneFrame->SwitchToView(nView);

*pResult = 0;
}

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