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如何更改属性页向导页的字体

概要

更多信息

具体步骤：
1、新建类CMySheet，继承自CPropertySheet
2、在.cpp文件中大概实现如下。
3、修改.h文件。
4、使用这个CMySheet，更改资源中的属性页，则程序运行后，设置的字体有效。

#define WM_RESIZEPAGE WM_APP+1

enum { CDF_CENTER, CDF_TOPLEFT, CDF_NONE };

// helper function which sets the font for a window and all its children
// and also resizes everything according to the new font
void ChangeDialogFont(CWnd* pWnd, CFont* pFont, int nFlag)
{
 CRect windowRect;

 // grab old and new text metrics
 TEXTMETRIC tmOld, tmNew;
 CDC * pDC = pWnd->GetDC();
 CFont * pSavedFont = pDC->SelectObject(pWnd->GetFont());
 pDC->GetTextMetrics(&tmOld);
 pDC->SelectObject(pFont);
 pDC->GetTextMetrics(&tmNew);
 pDC->SelectObject(pSavedFont);
 pWnd->ReleaseDC(pDC);

 long oldHeight = tmOld.tmHeight+tmOld.tmExternalLeading;
 long newHeight = tmNew.tmHeight+tmNew.tmExternalLeading;

 if (nFlag != CDF_NONE)
 {
  // calculate new dialog window rectangle
  CRect clientRect, newClientRect, newWindowRect;

  pWnd->GetWindowRect(windowRect);
  pWnd->GetClientRect(clientRect);
  long xDiff = windowRect.Width() - clientRect.Width();
  long yDiff = windowRect.Height() - clientRect.Height();
 
  newClientRect.left = newClientRect.top = 0;
  newClientRect.right = clientRect.right * tmNew.tmAveCharWidth / tmOld.tmAveCharWidth;
  newClientRect.bottom = clientRect.bottom * newHeight / oldHeight;

  if (nFlag == CDF_TOPLEFT) // resize with origin at top/left of window
  {
   newWindowRect.left = windowRect.left;
   newWindowRect.top = windowRect.top;
   newWindowRect.right = windowRect.left + newClientRect.right + xDiff;
   newWindowRect.bottom = windowRect.top + newClientRect.bottom + yDiff;
  }
  else if (nFlag == CDF_CENTER) // resize with origin at center of window
  {
   newWindowRect.left = windowRect.left -
       (newClientRect.right - clientRect.right)/2;
   newWindowRect.top = windowRect.top -
       (newClientRect.bottom - clientRect.bottom)/2;
   newWindowRect.right = newWindowRect.left + newClientRect.right + xDiff;
   newWindowRect.bottom = newWindowRect.top + newClientRect.bottom + yDiff;
  }
  pWnd->MoveWindow(newWindowRect);
 }

 pWnd->SetFont(pFont);

 // iterate through and move all child windows and change their font.
 CWnd* pChildWnd = pWnd->GetWindow(GW_CHILD);

 while (pChildWnd)
 {
  pChildWnd->SetFont(pFont);
  pChildWnd->GetWindowRect(windowRect);

  CString strClass;
  ::GetClassName(pChildWnd->m_hWnd, strClass.GetBufferSetLength(32), 31);
  strClass.MakeUpper();
  if(strClass==_T("COMBOBOX"))
  {
   CRect rect;
   pChildWnd->SendMessage(CB_GETDROPPEDCONTROLRECT,0,(LPARAM) &rect);
   windowRect.right = rect.right;
   windowRect.bottom = rect.bottom;
  }

  pWnd->ScreenToClient(windowRect);
  windowRect.left = windowRect.left * tmNew.tmAveCharWidth / tmOld.tmAveCharWidth;
  windowRect.right = windowRect.right * tmNew.tmAveCharWidth / tmOld.tmAveCharWidth;
  windowRect.top = windowRect.top * newHeight / oldHeight;
  windowRect.bottom = windowRect.bottom * newHeight / oldHeight;
  pChildWnd->MoveWindow(windowRect);
  
  pChildWnd = pChildWnd->GetWindow(GW_HWNDNEXT);
 }
}
/////////////////////////////////////////////////////////////////////////////
// CMySheet

IMPLEMENT_DYNAMIC(CMySheet, CPropertySheet)

CMySheet::CMySheet(UINT nIDCaption, CWnd* pParentWnd, UINT iSelectPage)
 :CPropertySheet(nIDCaption, pParentWnd, iSelectPage)
{
}

CMySheet::CMySheet(LPCTSTR pszCaption, CWnd* pParentWnd, UINT iSelectPage)
 :CPropertySheet(pszCaption, pParentWnd, iSelectPage)
{
}

CMySheet::~CMySheet()
{
 if (m_fntPage.m_hObject)
  VERIFY (m_fntPage.DeleteObject ());
}

BEGIN_MESSAGE_MAP(CMySheet, CPropertySheet)
 //{{AFX_MSG_MAP(CMySheet)
 //}}AFX_MSG_MAP
 ON_MESSAGE (WM_RESIZEPAGE, OnResizePage) 
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMySheet message handlers

void CMySheet::BuildPropPageArray()
{
 CPropertySheet::BuildPropPageArray();

 // get first page
 CPropertyPage* pPage = GetPage (0);
 ASSERT (pPage);
 
 // dialog template class in afxpriv.h
 CDialogTemplate dlgtemp;
 // load the dialog template
 VERIFY (dlgtemp.Load (pPage->m_psp.pszTemplate));
 // get the font information
 CString strFace;
 WORD wSize;
 VERIFY (dlgtemp.GetFont (strFace, wSize));
 if (m_fntPage.m_hObject)
  VERIFY (m_fntPage.DeleteObject ());
 // create a font using the info from first page
 VERIFY (m_fntPage.CreatePointFont (wSize*10, strFace));
}

BOOL CMySheet::OnInitDialog()
{
 CPropertySheet::OnInitDialog();

 // get the font for the first active page
 CPropertyPage* pPage = GetActivePage ();
 ASSERT (pPage);

 // change the font for the sheet
 ChangeDialogFont (this, &m_fntPage, CDF_CENTER);
 // change the font for each page
 for (int iCntr = 0; iCntr < GetPageCount (); iCntr++)
 {
  VERIFY (SetActivePage (iCntr));
  CPropertyPage* pPage = GetActivePage ();
  ASSERT (pPage);
  ChangeDialogFont (pPage, &m_fntPage, CDF_CENTER);
 }

 VERIFY (SetActivePage (pPage));

 // set and save the size of the page
 CTabCtrl* pTab = GetTabControl ();
 ASSERT (pTab);

 if (m_psh.dwFlags & PSH_WIZARD)
 {
  pTab->ShowWindow (SW_HIDE);
  GetClientRect (&m_rctPage);

  CWnd* pButton = GetDlgItem (ID_WIZBACK);
  ASSERT (pButton);
  CRect rc;
  pButton->GetWindowRect (&rc);
  ScreenToClient (&rc);
  m_rctPage.bottom = rc.top-2;
 }
 else
 {
  pTab->GetWindowRect (&m_rctPage);
  ScreenToClient (&m_rctPage);
  pTab->AdjustRect (FALSE, &m_rctPage);
 }

 // resize the page 
 pPage->MoveWindow (&m_rctPage);

 return TRUE;
}

BOOL CMySheet::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
 NMHDR* pnmh = (LPNMHDR) lParam;

 // the sheet resizes the page whenever it is activated so we need to size it correctly
 if (TCN_SELCHANGE == pnmh->code)
  PostMessage (WM_RESIZEPAGE);
 
 return CPropertySheet::OnNotify(wParam, lParam, pResult);
}

LONG CMySheet::OnResizePage (UINT, LONG)
{
 // resize the page
 CPropertyPage* pPage = GetActivePage ();
 ASSERT (pPage);
 pPage->MoveWindow (&m_rctPage);

 return 0;
}

BOOL CMySheet::OnCommand(WPARAM wParam, LPARAM lParam)
{
 // the sheet resizes the page whenever the Apply button is clicked so we need to size it correctly
 if (ID_APPLY_NOW == wParam ||
  ID_WIZNEXT == wParam ||
  ID_WIZBACK == wParam)
  PostMessage (WM_RESIZEPAGE);
 
 return CPropertySheet::OnCommand(wParam, lParam);
}

posted on 2008-01-25 17:42 浪迹天涯 阅读(5519) 评论(10)  编辑 收藏 引用 所属分类: C++