MFC多文档应用程序常用知识点

1、修改左上角圆形按图标。可以将要显示的图标放在资源中加载，也可以将图标文件放在程序目录下加载。

CRect rt1;
m_wndRibbonBar.GetClientRect(&rt1);
CMFCRibbonApplicationButton * pAppButton = m_wndRibbonBar.GetApplicationButton();
HBITMAP hBitmap = (HBITMAP)::LoadImage(NULL,
	CScale3DCGlobal::GetAppllicationPath()+ _T("\\user\\admin.bmp"),
	IMAGE_BITMAP,
	0, 0, //原始大小
	LR_DEFAULTCOLOR | LR_CREATEDIBSECTION | LR_LOADFROMFILE);
pAppButton->SetImage(hBitmap);

以上代码放在MainFrame.cpp的OnCreate中执行。
２、在Ribbon中加载自己的控件

CRect rt(10, rt1.bottom+3, 460, rt1.bottom + 3+107);
m_LedString.Create(_T("000000"), 0, rt, &m_wndRibbonBar, IDC_LED1);
m_LedString.SetStringPost(25, 21);
m_LedString.SetStringAmp(0.3);
m_LedString.SetTip(_T("COM4:9600 XK3190A9 COM2:YH-5大屏幕"));
m_LedString.SetUnit(_T("公斤"));

3、在一个按钮点击事件中创建新的视图

if (m_bIsScaleWeightView)
{
	m_pScaleWeightChildFrame->ActivateFrame();//激活已存在的视图
	m_pScaleWeightChildFrame->SetFocus();
	return;
}
m_pScaleWeightChildFrame = new CScale3DCChildFrame;
CCreateContext context;
context.m_pNewViewClass = RUNTIME_CLASS(CScale3DCScaleWeightView);
if (!m_pScaleWeightChildFrame->LoadFrame(IDR_MAINFRAME,
	WS_OVERLAPPEDWINDOW | FWS_PREFIXTITLE, AfxGetMainWnd(), &context))
	return;

m_pScaleWeightChildFrame->InitialUpdateFrame(NULL, TRUE);
m_bIsScaleWeightView = TRUE;//防止重复创建视图

4、通过工具栏隐藏和显示面板

BOOL CScale3DCMainFrame::OnCloseDockingPane(CDockablePane* pWnd)//虚函数
{
	// TODO: 在此添加专用代码和/或调用基类
	m_bVideoShow = TRUE;
	m_bDataGridShow = TRUE;

	return CMDIFrameWndEx::OnCloseDockingPane(pWnd);
}

//虚函数
BOOL CScale3DCMainFrame::OnCloseMiniFrame(CPaneFrameWnd* pWnd)
{
	// TODO: 在此添加专用代码和/或调用基类
	CWnd* pwnd = pWnd->GetPane();
	if (pwnd->IsKindOf(RUNTIME_CLASS(CTabbedPane)))//多个窗口
	{
		CTabbedPane* tabpane = (CTabbedPane *)pwnd;

		CMFCBaseTabCtrl* pTabWnd = tabpane->GetUnderlyingWindow();
		//关闭所有的面板
		for (int i = 0; i < pTabWnd->GetTabsNum(); i++)
		{
			CDockablePane* pBar = DYNAMIC_DOWNCAST(CDockablePane, 
			                               pTabWnd->GetTabWnd(i));
			if (pBar != NULL)
			{
				ASSERT_VALID(pBar);
				//将关闭消息加入该DockPane队列，等待完成本函数后关闭
				::PostMessageA(pBar->m_hWnd, WM_CLOSE, 0, 0);
			}
		}
	}
	else 
	{ //单个窗口
		CDockablePane* pane = (CDockablePane *)pwnd;
		if (pane->IsKindOf(RUNTIME_CLASS(CDockablePane)) || 
		pane->IsKindOf(RUNTIME_CLASS(CPane))
		 && pane->IsKindOf(RUNTIME_CLASS(CPaneFrameWnd)))
		{
			//将关闭消息加入该DockPane队列，等待完成本函数后关闭
			::PostMessageA(pWnd->GetPane()->m_hWnd, WM_CLOSE, 0, 0);
		}
	}
	m_bVideoShow = TRUE;
	m_bDataGridShow = TRUE;
	return TRUE;
	//return CMDIFrameWndEx::OnCloseMiniFrame(pWnd);
}

void CScale3DCMainFrame::OnButtonVideo()
{
	if (!m_bVideoShow)
	{
		m_bVideoShow = TRUE;

		m_wndVideoPanel.ShowPane(FALSE, FALSE, FALSE);
	}
	else if (m_wndVideoPanel.GetSafeHwnd())
	{
		m_bVideoShow = FALSE;

		m_wndVideoPanel.ShowPane(TRUE, FALSE, TRUE);
	}
	else
	{
		BOOL bNameValid;

		CString strPropertiesWnd;

		bNameValid = strPropertiesWnd.LoadString(IDS_PROPERTIES_WND);
		ASSERT(bNameValid);

		if (!m_wndVideoPanel.Create(strPropertiesWnd, this, 
		CRect(0, 0, 200, 200), 
		TRUE, 
		ID_VIEW_PROPERTIESWND,
		WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | 
		CBRS_RIGHT | CBRS_FLOAT_MULTI))
		{
			TRACE("未能创建%s窗口\n", strPropertiesWnd);
			return;
		}

		m_wndVideoPanel.EnableDocking(CBRS_ALIGN_ANY);
		DockPane(&m_wndVideoPanel);

		m_bVideoShow    = FALSE;
	}

	RecalcLayout();
}


void CScale3DCMainFrame::OnButtonDatagrid()
{
	// TODO: 在此添加命令处理程序代码
	if (!m_bDataGridShow)
	{
		m_bDataGridShow = TRUE;

		m_wndDataGridPanel.ShowPane(FALSE, FALSE, FALSE);
	}
	else if (m_wndDataGridPanel.GetSafeHwnd())
	{
		m_bDataGridShow = FALSE;

		m_wndDataGridPanel.ShowPane(TRUE, FALSE, TRUE);
	}
	else
	{
		BOOL bNameValid;

		CString strPropertiesWnd;

		bNameValid = strPropertiesWnd.LoadString(IDS_OUTPUT_WND);
		ASSERT(bNameValid);

		if (!m_wndDataGridPanel.Create(strPropertiesWnd, this, 
		CRect(0, 0, 200, 200), 
		TRUE, ID_VIEW_PROPERTIESWND,
		WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | 
		CBRS_RIGHT | CBRS_FLOAT_MULTI))
		{
			TRACE("未能创建%s窗口\n", strPropertiesWnd);
			return;
		}

		m_wndDataGridPanel.EnableDocking(CBRS_ALIGN_ANY);
		DockPane(&m_wndDataGridPanel);

		m_bDataGridShow = FALSE;
	}

	RecalcLayout();
}

5、设置视图的标签标题文字

BOOL CScale3DCChildFrame::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: 在此处通过修改 CREATESTRUCT cs 来修改窗口类或样式
	cs.style &= ~(LONG)FWS_ADDTOTITLE;
	if( !CMDIChildWndEx::PreCreateWindow(cs) )
		return FALSE;

	return TRUE;
}

void CScale3DCScaleWeightView::OnInitialUpdate()
{
	CFormView::OnInitialUpdate();
	CMDIChildWndEx * pFrame = (CMDIChildWndEx*)this->GetParentFrame();
	CScale3DCChildFrame * pMidFrame = (CScale3DCChildFrame*)pFrame;

	pMidFrame->SetWindowText(_T("称重数据区"));
	// TODO: 在此添加专用代码和/或调用基类
}

6、改变视图的背景颜色

BOOL CScale3DCScaleWeightView::OnEraseBkgnd(CDC* pDC)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	CRect   rt;
	GetClientRect(&rt);
	CBrush   brush;
	brush.CreateSolidBrush(RGB(255, 255, 255));
	CBrush * pOldBrush = pDC->SelectObject(&brush);
	pDC->FillRect(&rt, &brush);

	pDC->SelectObject(pOldBrush);

	return TRUE;
	//return CFormView::OnEraseBkgnd(pDC);
}

7、在一个视图中创建另一个视图

CScale3DCMainFrame * pMainFrame = (CScale3DCMainFrame*)AfxGetMainWnd();
CScale3DCMainControlPanel2 * pPanel = &pMainFrame->m_wndMainControlPanel;
pPanel->m_wndMainToolbarDlg->CreateScaleWeightView();

8、遍历主框架中的子框架

void CScale3DCMainFrame::SearchAllMDIFrame()
{
	CMDIFrameWnd *pFrame = (CMDIFrameWnd*)::AfxGetMainWnd();
	if (pFrame)
	{
		CMDIChildWnd *pOldChildFrame = pFrame->MDIGetActive();
		CMDIChildWnd *pChildFrame = pOldChildFrame;
		if (pChildFrame)
		{
			do {
				CString  strCaption;
				pChildFrame->GetWindowText(strCaption);
				if (_T("主控界面区") == strCaption)
				{
				   CView  * pView=	pChildFrame->GetActiveView();
				   //消息发向主控视图
				   pView->SendMessage(WM_STARTSCALEWEIGHTVIEW, 0, 0);
				   return;
				}
				pFrame->MDINext();
				pChildFrame = pFrame->MDIGetActive();
			} while (pChildFrame != pOldChildFrame);
		}
	}
}