StatusBar on Dialogs-为作为主窗口的对话框添加状态栏的一种方法

感谢CSDN论坛上的Featured(我握着爱情的门票静静排队……) 提供了一个演示程序的下载链接：http://www.bypro.net/PostAttachment.aspx?PostID=21994&AttachmentID=1834

感谢CSDN论坛上的Featured(我握着爱情的门票静静排队……) 提供了本文的链接

http://www.codeguru.com/Cpp/W-D/dislog/toolbarsandstatusbars/article.php/c1955/

Girish Pandit (view profile)

July 28, 1999

Basically, it turned out that I had to dig very deep into the MFC documentation in order to find anything to help me out. One example I found is by ZEKSER Cyril. His techniques works fine, but (IMHO) is not very "clean" since you have to place an invisible static object on the dialog as a kind of placeholder for the status bar. However, I do want to thank him very much for showing me the light at the end of the tunnel.

The technique I came up with works like this: First, you need to develop your dialog (and define its CDialog-based class). Nothing new here so far.

Then, insert the following code into the CDialog::OnInitDialog function (the m_StatBar variable is of type CStatusBarCtrl).

BOOL CMyDlg::OnInitDialog()

{

CDialog::OnInitDialog();

// Set the icon for this dialog. The framework does this automatically

// when the application's main window is not a dialog

SetIcon(m_hIcon, TRUE);// Set big icon

SetIcon(m_hIcon, FALSE);// Set small icon

/************************************************************************/

/*Adding STATUSBAR*/

/************************************************************************/

int nTotWide;// total width of status bar

CRect rect;

this->GetWindowRect(&rect);

rect.top = rect.bottom- 25;

m_bRvStatOk = m_StatBar.Create(WS_CHILD | WS_BORDER | WS_VISIBLE ,rect,this,

IDC_STATUSBAR);

if (m_bRvStatOk == NULL)

{

AfxMessageBox ("Status Bar not created!", NULL, MB_OK );

}

//

//get size of window, use to configure the status

//bar with four separate parts

//

CRect rWin;

this->GetWindowRect(&rWin);

nTotWide = rWin.right-rWin.left;

//

// Make each part 1/4 of the total width of the window.

//

m_Widths[0] = nTotWide / 4;

m_Widths[1] = nTotWide / 2;

m_Widths[2] = nTotWide - m_Widths[0];

m_Widths[3] = -1;

m_StatBar.SetMinHeight(25);

m_StatBar.SetParts( 4, m_Widths);

//

// now lets put some text, different styles into parts of status bar

//

m_StatBar.SetText("WITH BORDER.", 0,0);

m_StatBar.SetText("WITHOUT BORDER.",1,SBT_NOBORDERS);

m_StatBar.SetText("POPUP.",2,SBT_POPOUT);

//

//make the last part owner-drawn, add a bitmap

//

m_StatBar.SetText(NULL,3, SBT_OWNERDRAW);

//hBmp is a Global Variable of type HBITMAP

hBmp = ::LoadBitmap(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDB_BITMAP1));

/************************************************************************/

/*End STATUSBAR*/

/************************************************************************/

// TODO: Add extra initialization here

return TRUE; // return TRUE unless you set the focus to a control

}

The fourth pane of the status bar is owner drawn because it is used to display a bitmap. In order to do this, simply add a message handler for the dialog's WM_DRAWITEM message. Once you've added that function, update it so that when finished it looks like the following.

void CMyDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)

{

//

// Draw bitmap in status bar

//

HDC hdcMem;// device context for memory

HGDIOBJ hbmOld; // old bitmap area we're over-writing

BITMAP bm;// bitmap we're using

//

// Create a compatible DC in memory

//

hdcMem = CreateCompatibleDC(lpDrawItemStruct->hDC);

// Select the "logo.bmp" bitmap into the DC.

hbmOld = ::SelectObject(hdcMem, hBmp);

// Get the size of the bitmap

::GetObject(hBmp, sizeof(bm), &bm);

// Blt the bitmap to the part.

BitBlt(lpDrawItemStruct->hDC,lpDrawItemStruct->rcItem.left,

lpDrawItemStruct->rcItem.top, bm.bmWidth, bm.bmHeight,

hdcMem, 0, 0,SRCCOPY);

//

// Add some text..1st. get bounding rectangle, then position & display text

//

char szText[16];

RECT rText; // text rectangle

rText.left = lpDrawItemStruct->rcItem.left+24;

rText.top = lpDrawItemStruct->rcItem.top;

rText.right = lpDrawItemStruct->rcItem.right-20;

rText.bottom = lpDrawItemStruct->rcItem.bottom;

//

// add some text after the logo bitmap here

//

memset(szText,0,sizeof(szText));

strcpy(szText,"LOGO");// text to draw

SelectObject( lpDrawItemStruct->hDC, GetStockObject( ANSI_VAR_FONT ) );

::SetBkColor(lpDrawItemStruct->hDC, 0x00c0c0c0); // set background color

ExtTextOut(lpDrawItemStruct->hDC, lpDrawItemStruct->rcItem.left+24, lpDrawItemStruct->rcItem.top+4, ETO_OPAQUE, &rText, szText,

strlen(szText),NULL );// draw the text in the rectangle rText

//

// End adding text. Reselect the original object into the DC.

//

SelectObject(hdcMem, hbmOld);

// Delete the compatible DC.

DeleteDC(hdcMem);

}

Make the following changes to the dialog's header file.

class CMyDlg : public CDialog

{

// Construction

public:

CMyDlg(CWnd* pParent = NULL);// standard constructor

CStatusBarCtrlm_StatBar;

.....................................

...................................

......................................

}

CStatusBarCtrlm_StatBar;

.....................................

...................................

......................................

}

Finally, make the following changes to the resource.h file.

//{{NO_DEPENDENCIES}}

// Microsoft Developer Studio generated include file.

//

#define IDM_ABOUTBOX0x0010

#define IDC_STATUSBAR 32500

.....................................

...................................

......................................

That's it! You now have a status bar at the bottom of your dialog!

Basically, it turned out that I had to dig very deep into the MFC documentation in order to find anything to help me out. One example I found is by ZEKSER Cyril. His techniques works fine, but (IMHO) is not very "clean" since you have to place an invisible static object on the dialog as a kind of placeholder for the status bar. However, I do want to thank him very much for showing me the light at the end of the tunnel.

The technique I came up with works like this: First, you need to develop your dialog (and define its CDialog-based class). Nothing new here so far.

Then, insert the following code into the CDialog::OnInitDialog function (the m_StatBar variable is of type CStatusBarCtrl).

BOOL CMyDlg::OnInitDialog()

{

CDialog::OnInitDialog();

// Set the icon for this dialog. The framework does this automatically

// when the application's main window is not a dialog

SetIcon(m_hIcon, TRUE);// Set big icon

SetIcon(m_hIcon, FALSE);// Set small icon

/************************************************************************/

/*Adding STATUSBAR*/

/************************************************************************/

int nTotWide;// total width of status bar

CRect rect;

this->GetWindowRect(&rect);

rect.top = rect.bottom- 25;

m_bRvStatOk = m_StatBar.Create(WS_CHILD | WS_BORDER | WS_VISIBLE ,rect,this,

IDC_STATUSBAR);

if (m_bRvStatOk == NULL)

{

AfxMessageBox ("Status Bar not created!", NULL, MB_OK );

}

//

//get size of window, use to configure the status

//bar with four separate parts

//

CRect rWin;

this->GetWindowRect(&rWin);

nTotWide = rWin.right-rWin.left;

//

// Make each part 1/4 of the total width of the window.

//

m_Widths[0] = nTotWide / 4;

m_Widths[1] = nTotWide / 2;

m_Widths[2] = nTotWide - m_Widths[0];

m_Widths[3] = -1;

m_StatBar.SetMinHeight(25);

m_StatBar.SetParts( 4, m_Widths);

//

// now lets put some text, different styles into parts of status bar

//

m_StatBar.SetText("WITH BORDER.", 0,0);

m_StatBar.SetText("WITHOUT BORDER.",1,SBT_NOBORDERS);

m_StatBar.SetText("POPUP.",2,SBT_POPOUT);

//

//make the last part owner-drawn, add a bitmap

//

m_StatBar.SetText(NULL,3, SBT_OWNERDRAW);

//hBmp is a Global Variable of type HBITMAP

hBmp = ::LoadBitmap(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDB_BITMAP1));

/************************************************************************/

/*End STATUSBAR*/

/************************************************************************/

// TODO: Add extra initialization here

return TRUE; // return TRUE unless you set the focus to a control

}

The fourth pane of the status bar is owner drawn because it is used to display a bitmap. In order to do this, simply add a message handler for the dialog's WM_DRAWITEM message. Once you've added that function, update it so that when finished it looks like the following.

void CMyDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)

{

//

// Draw bitmap in status bar

//

HDC hdcMem;// device context for memory

HGDIOBJ hbmOld; // old bitmap area we're over-writing

BITMAP bm;// bitmap we're using

//

// Create a compatible DC in memory

//

hdcMem = CreateCompatibleDC(lpDrawItemStruct->hDC);

// Select the "logo.bmp" bitmap into the DC.

hbmOld = ::SelectObject(hdcMem, hBmp);

// Get the size of the bitmap

::GetObject(hBmp, sizeof(bm), &bm);

// Blt the bitmap to the part.

BitBlt(lpDrawItemStruct->hDC,lpDrawItemStruct->rcItem.left,

lpDrawItemStruct->rcItem.top, bm.bmWidth, bm.bmHeight,

hdcMem, 0, 0,SRCCOPY);

//

// Add some text..1st. get bounding rectangle, then position & display text

//

char szText[16];

RECT rText; // text rectangle

rText.left = lpDrawItemStruct->rcItem.left+24;

rText.top = lpDrawItemStruct->rcItem.top;

rText.right = lpDrawItemStruct->rcItem.right-20;

rText.bottom = lpDrawItemStruct->rcItem.bottom;

//

// add some text after the logo bitmap here

//

memset(szText,0,sizeof(szText));

strcpy(szText,"LOGO");// text to draw

SelectObject( lpDrawItemStruct->hDC, GetStockObject( ANSI_VAR_FONT ) );

::SetBkColor(lpDrawItemStruct->hDC, 0x00c0c0c0); // set background color

ExtTextOut(lpDrawItemStruct->hDC, lpDrawItemStruct->rcItem.left+24, lpDrawItemStruct->rcItem.top+4, ETO_OPAQUE, &rText, szText,

strlen(szText),NULL );// draw the text in the rectangle rText

//

// End adding text. Reselect the original object into the DC.

//

SelectObject(hdcMem, hbmOld);

// Delete the compatible DC.

DeleteDC(hdcMem);

}

Make the following changes to the dialog's header file.

class CMyDlg : public CDialog

{

// Construction

public:

CMyDlg(CWnd* pParent = NULL);// standard constructor

CStatusBarCtrlm_StatBar;

.....................................

...................................

......................................

}

CStatusBarCtrlm_StatBar;

.....................................

...................................

......................................

}

Finally, make the following changes to the resource.h file.

//{{NO_DEPENDENCIES}}

// Microsoft Developer Studio generated include file.

//

#define IDM_ABOUTBOX0x0010

#define IDC_STATUSBAR 32500

.....................................

...................................

......................................

That's it! You now have a status bar at the bottom of your dialog!

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