为状态栏添加显示辅助信息功能

1、为状态栏添加像素位置，度量单位，图像大小以及图像位数四个信息一、在主框架中定义状态栏各个分栏位置。1、在CMainFrame.h中，添加：#define PANE_CURSOR_POSITION1#define PANE_LENGTH_UNIT2#define PANE_IMAGE_SIZE3#define PANE_BIT_COUNT42、在CMainFrame.cpp中，indicators数组处改为：static UINT indicators =ID_SEPARATOR, / status line indicator/ cursor position ID_SEPARATOR,/ l

2、ength unitID_SEPARATOR,/ image sizeID_SEPARATOR,/ bit countID_SEPARATOR,ID_INDICATOR_CAPS,ID_INDICATOR_NUM,ID_INDICATOR_SCRL,;3、在OnCreate函数中，添加如下代码：int CMainFrame:OnCreate(LPCREATESTRUCT lpCreateStruct)if (!m_wndStatusBar.Create(this) |!m_wndStatusBar.SetIndicators(indicators, sizeof(indicators)/siz

3、eof(UINT)TRACE0("Failed to create status barn");return -1; / fail to create/ add panesm_wndStatusBar.SetPaneInfo( PANE_CURSOR_POSITION, ID_SEPARATOR, SBPS_NORMAL, 72); m_wndStatusBar.SetPaneInfo( PANE_LENGTH_UNIT, ID_SEPARATOR, SBPS_NORMAL, 25); m_wndStatusBar.SetPaneInfo( PANE_IMAGE_SIZE,

4、 ID_SEPARATOR, SBPS_NORMAL, 72);m_wndStatusBar.SetPaneInfo( PANE_BIT_COUNT, ID_SEPARATOR, SBPS_NORMAL, 28);二、添加各状态栏分栏的控制函数1、在String Table中，添加以下几个字串：2、在View类中，添加成员变量：int m_nLengthUnit，并在View类的构造函数中，添加初始化代码：m_nLengthUnit = MM_TEXT;3、在View类中，添加以下几个成员函数：voidSetStatusBarLengthUnit(int nUnit);voidSetStatu

5、sBarCursorPosition(CPoint point);voidSetStatusBarImageSize(CSize size);voidSetLengthUnit(int nUnit);voidSetStatusBarBitCount(WORD wBitcount);4、分别为它们添加函数代码：void CImageBoardView:SetStatusBarBitCount(WORD wBitcount)CString str;switch (wBitcount)case 1:str.LoadString(IDS_BITCOUNT_1);break;case 4:str.Loa

6、dString(IDS_BITCOUNT_4);break;case 8:str.LoadString(IDS_BITCOUNT_8);break;case 24:default:str.LoadString(IDS_BITCOUNT_24);break;CMainFrame* pMainFrame= (CMainFrame*)( AfxGetApp()->m_pMainWnd);ASSERT_KINDOF(CMainFrame, pMainFrame); pMainFrame->m_wndStatusBar.SetPaneText(PANE_BIT_COUNT, str);voi

7、d CImageBoardView:SetStatusBarLengthUnit(int nUnit)CString str;switch (m_nLengthUnit)case MM_HIENGLISH:str.LoadString(IDS_LENGTH_UNIT_INCH);break;case MM_HIMETRIC:str.LoadString(IDS_LENGTH_UNIT_MM);break;case MM_TEXT:default:str.LoadString(IDS_LENGTH_UNIT_PIXEL);break;CMainFrame* pMainFrame= (CMainF

8、rame*)( AfxGetApp()->m_pMainWnd);ASSERT_KINDOF(CMainFrame, pMainFrame); pMainFrame->m_wndStatusBar.SetPaneText(PANE_LENGTH_UNIT, str);void CImageBoardView:SetStatusBarCursorPosition(CPoint point)CWindowDC dc(this);dc.LPtoDP(&point);int nOldUnit = dc.SetMapMode(m_nLengthUnit);dc.DPtoLP(&

9、;point);dc.SetMapMode(nOldUnit);CString msg;double fCX = abs(point.x), fCY = abs(point.y);switch (m_nLengthUnit)case MM_TEXT:msg.Format("%d,%d", (int)fCX, (int)fCY);break;case MM_HIENGLISH:fCX /= 1000.0;fCY /= 1000.0;msg.Format("%.2f,%.2f", fCX, fCY);break;case MM_HIMETRIC:fCX /=

10、 100.0;fCY /= 100.0;msg.Format("%.1f,%.1f", fCX, fCY);break;CMainFrame* pMainFrame= (CMainFrame*)( AfxGetApp()->m_pMainWnd);ASSERT_KINDOF(CMainFrame, pMainFrame); pMainFrame->m_wndStatusBar.SetPaneText(PANE_CURSOR_POSITION, msg);void CImageBoardView:SetStatusBarImageSize(CSize size)C

11、WindowDC dc(this);dc.LPtoDP(&size);int nOldUnit = dc.SetMapMode(m_nLengthUnit);dc.DPtoLP(&size);dc.SetMapMode(nOldUnit);CString msg;double fCX = abs(size.cx), fCY = abs(size.cy);switch (m_nLengthUnit)case MM_TEXT:msg.Format("%d,%d", (int)fCX, (int)fCY);break;case MM_HIENGLISH:fCX /

12、= 1000.0;fCY /= 1000.0;msg.Format("%.2f,%.2f", fCX, fCY);break;case MM_HIMETRIC:fCX /= 100.0;fCY /= 100.0;msg.Format("%.1f,%.1f", fCX, fCY);break;CMainFrame* pMainFrame= (CMainFrame*)( AfxGetApp()->m_pMainWnd);ASSERT_KINDOF(CMainFrame, pMainFrame); pMainFrame->m_wndStatusBa

13、r.SetPaneText(PANE_IMAGE_SIZE, msg);void CImageBoardView:SetLengthUnit(int nUnit) m_nLengthUnit = nUnit;SetStatusBarLengthUnit(nUnit);CSize sizeTotal(m_pDib->GetWidth(), m_pDib->GetHeight();SetStatusBarImageSize(sizeTotal);CMenu *pMenu = AfxGetApp()->m_pMainWnd->GetMenu();switch (m_nLeng

14、thUnit)case MM_HIENGLISH:pMenu->CheckMenuRadioItem(IDM_PIXEL, IDM_MM, IDM_INCH, MF_BYCOMMAND);break;case MM_HIMETRIC:pMenu->CheckMenuRadioItem(IDM_PIXEL, IDM_MM, IDM_MM, MF_BYCOMMAND);break;case MM_TEXT:default:pMenu->CheckMenuRadioItem(IDM_PIXEL, IDM_MM, IDM_PIXEL, MF_BYCOMMAND);break;5、为V

15、iew类添加OnActivateView虚函数，在函数中添加如下代码：void CImageBoardView:OnActivateView(BOOL bActivate, CView* pActivateView, CView* pDeactiveView) if (bActivate)SetLengthUnit(m_nLengthUnit);SetStatusBarBitCount(m_pDib->GetBitCount();CScrollView:OnActivateView(bActivate, pActivateView, pDeactiveView);6、为View类添加OnMouseMove函数：void CImageBoardView:OnMouseMove(UINT nFlags, CPoint point) SetStatusBarCursorPosition(point);CScrollView:OnMouseMove(nFlags, point);7、将m_wndStatusBar的属性改为public。三、实现测量单位切换1、在菜单中，添加“长度单位”菜单：相应菜单项的ID为：像素IDM_PIXEL