www.gusucode.com > 基于VC编程界面编程高级应用技术源码程序 > VC界面编程高级应用技术/code/3/MyStatusBar/MainFrm.cpp

    // MainFrm.cpp : implementation of the CMainFrame class
//

#include "stdafx.h"
#include "MyStatusBar.h"

#include "MainFrm.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMainFrame

IMPLEMENT_DYNCREATE(CMainFrame, CFrameWnd)
BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
//加入对时间区域进行界面维护的宏申明
	ON_UPDATE_COMMAND_UI(ID_INDICATOR_DATE,OnUpdateDate)
	ON_WM_CREATE()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
static UINT indicators[] =
{
	ID_SEPARATOR,           // status line indicator
		ID_INDICATOR_CAPS,
		ID_INDICATOR_NUM,
		ID_INDICATOR_SCRL,
};

/////////////////////////////////////////////////////////////////////////////
// CMainFrame construction/destruction

CMainFrame::CMainFrame()
{
	// TODO: add member initialization code here
	
}

CMainFrame::~CMainFrame()
{
}

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP
		| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
		!m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
	{
		TRACE0("Failed to create toolbar\n");
		return -1;      // fail to create
	}
	
	if (!m_wndStatusBar.Create(this) ||
		!m_wndStatusBar.SetIndicators(indicators,
		sizeof(indicators)/sizeof(UINT)))
	{
		TRACE0("Failed to create status bar\n");
		return -1;      // fail to create
	}
	
	// TODO: Delete these three lines if you don't want the toolbar to
	//  be dockable
	m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
	EnableDocking(CBRS_ALIGN_ANY);
	DockControlBar(&m_wndToolBar);
	
	//在状态栏中添加新的区域用以显示时间
	//得到目前状态栏共有多少个区域
	int nOrigSize = sizeof(indicators) / sizeof(UINT);
	//构建对话框ID标识数组
	UINT* pIndicators = new UINT[nOrigSize + 1];
	memcpy(pIndicators, indicators, sizeof(indicators));
	IndexOfTimeZone = nOrigSize++;
	//大状态栏的右侧部份设置成时间区域
	pIndicators[IndexOfTimeZone] = ID_INDICATOR_DATE;
	m_wndStatusBar.SetIndicators(pIndicators, nOrigSize);
	delete[] pIndicators;
}

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
	if( !CFrameWnd::PreCreateWindow(cs) )
		return FALSE;
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CMainFrame diagnostics

#ifdef _DEBUG
void CMainFrame::AssertValid() const
{
	CFrameWnd::AssertValid();
}

void CMainFrame::Dump(CDumpContext& dc) const
{
	CFrameWnd::Dump(dc);
}

#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMainFrame message handlers

void CMainFrame::OnUpdateDate(CCmdUI *pCmdUI)
{
	//得到系统当前时间
	CTime time = CTime::GetCurrentTime();
	CString strDate = time.Format(_T("%A, %B %d, %y "));
	// 根据时间字
	//符串的长度计算它在状态栏输出时所需要的长度
	CSize size;
	HGDIOBJ hOldFont = NULL;
	//得到当前状态栏字体
	HFONT hFont = (HFONT)m_wndStatusBar.SendMessage(WM_GETFONT);
	CClientDC dc(NULL);
	if (hFont != NULL) 
		hOldFont = dc.SelectObject(hFont);
	//得到当前文本所需要的显示宽度
	size = dc.GetTextExtent(strDate);
	if (hOldFont != NULL) 
		dc.SelectObject(hOldFont);
	// 修改状态栏
	//设置时间区域的宽度size.cx
	m_wndStatusBar.SetPaneInfo(IndexOfTimeZone, ID_INDICATOR_DATE,0, size.cx);
	//设定时间区域的标题
	pCmdUI->SetText(strDate);
	//启用时间区域
	pCmdUI->Enable(TRUE);
}