CCreateContext

当创建视图时，MFC使用CCreateContext结构体把视图，文档进行关联。The framework uses the CCreateContext structure when it creates the frame windows and views that are associated with a document. A CCreateContext structure contains pointers to the document, the frame window, the view, and the document template. A view should not be created for a nonexistent document. All of the pointers in CCreateContext are optional and can be NULL if unspecified or unknown.

Member

  • m_pNewViewClass：CRuntimeClass*
  • m_pCurrentDoc：CDocument*
  • m_pNewDocTemplate: CDocTemplate*
  • m_pLastView: CView*
  • m_pCurrentFrame: CFrameWnd*

CDocTemplate::CreateNewFrame() -> CFrameWnd::LoadFrame() -> CFrameWnd::Create() -> CMainFrame::OnCreate() -> CMainFrame::OnCreateClient() -> CFrameWnd::CreateView() -> pContext->m_pNewViewClass->CreateObject() -> CWnd::Create()

  • CFrameWnd::Create()
  • CFrameWnd::LoadFrame()
  • CFrameWnd::OnCreateClient()
  • CSplitterWnd::Create()
  • CSplitterWnd::CreateView()
  • CWnd::Create()

拆分窗口

在OnCreateClient函数中，可以使用CSplitterWnd::CreateStatic()可以设置窗口为几行几列。

CSplitterWnd split;

BOOL CMyFrameWnd::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext)
{
	// TODO: Add your specialized code here and/or call the base class
	split.CreateStatic(this, 1, 2);
	split.CreateView(0, 0, RUNTIME_CLASS(CMyView), CSize(100, 100), pContext);
	split.CreateView(0, 1, pContext->m_pNewViewClass, CSize(100, 100), pContext);
	m_pViewActive = (CView*)split.GetPane(0, 0);
	return true;
	//return CFrameWnd::OnCreateClient(lpcs, pContext);
}

强制更新视图

void CMyDoc::OnFileNew()
{
	this->str = _T("Hello World");
	this->UpdateAllViews(NULL);
}

void CMyView::OnDraw(CDC* pDC)
{
	// TODO: Add your specialized code here and/or call the base class
	CMyDoc * cmyDoc=(CMyDoc*) this->m_pDocument;
	pDC->TextOut(100, 100, cmyDoc->str);
}

CDocument::AddView

Call this function to attach a view to the document. This function adds the specified view to the list of views associated with the document; the function also sets the view’s document pointer to this document. The framework calls this function when attaching a newly created view object to a document; this occurs in response to a File New, File Open, or New Window command or when a splitter window is split. Call this function only if you are manually creating and attaching a view.