Advanced MFC Programming

Chapter 7. Common Dialog Boxes
Retrieving Selected Font
After the font dialog box is closed, the font that is selected by the user can be retrieved through
following member functions: CFontDialog::GetFaceName(), CFontDialog::IsBold(), CFongDialog::
IsItalic()….
Sample
Sample 7.7\CDB demonstrates how to use font dialog box. It is based on sample 7.6\CDB with a new
command Font Dialog Box | Initialize added to the application. The ID of this command is
ID_FONTDIALOGBOX_INITIALIZE, and its WM_COMMAND message handler is CCDBDoc::
OnFontdialogboxInitialize(). The command is implement as follows:
void CCDBDoc::OnFontdialogboxInitialize()
{
LOGFONT lf;
CFontDialog dlg;
CString szStr;
COLORREF color;
memset(&lf, 0, sizeof(LOGFONT));
lf.lfItalic=TRUE;
lf.lfUnderline=TRUE;
lf.lfStrikeOut=TRUE;
lf.lfWeight=FW_BOLD;
strcpy(lf.lfFaceName, "Times New Roman");
}
dlg.m_cf.rgbColors=RGB(255, 255, 0);
dlg.m_cf.Flags|=CF_LIMITSIZE|CF_EFFECTS|CF_INITTOLOGFONTSTRUCT;
dlg.m_cf.nSizeMin=20;
dlg.m_cf.nSizeMax=48;
dlg.m_cf.lpLogFont=&lf;
if(dlg.DoModal() == IDOK)
{
color=dlg.GetColor();
szStr.Format("Font Color: R=%d, G=%d, B=%d",
GetRValue(color), GetGValue(color), GetBValue(color));
szStr+="\nFace Name: ";
szStr+=dlg.GetFaceName();
if(dlg.IsItalic() == TRUE)szStr+="\nFont is italic";
if(dlg.IsUnderline() == TRUE)szStr+="\nFont is underlined";
if(dlg.IsStrikeOut() == TRUE)szStr+="\nFont is strike out";
if(dlg.IsBold())szStr+="\nFont is bolded";
AfxMessageBox(szStr);
}
The initially selected font is “Times New Roman”, whose color is yellow (RGB(255, 255, 0)), and
has the following styles: italic, underlined, strikeout, bolded. The range of the font size is restricted
between 20 and 48. After the user clicks button “OK”, the properties of the selected font are retrieved
through member functions of class CFontDialog, and are displayed in a message box.
7.8 Customizing Dialog Box Template
Like file and color dialog boxes, we can use custom dialog template to implement font dialog box.
This gives us a chance to move, resize or hide some standard controls. To use a custom template, we need
the following steps: 1) Design a new dialog template that contains all the controls in a standard font dialog
box. 2) Set CF_ENABLETEMPLATE bit for member Flags of structure CHOOSEFONT, and assign custom template
name to member lpTemplateName. 3) Assign application’s instance handle to member hInstance.
The standard dialog template can be found in file “Commdlg.dll”. It can be opened from Developer
Studio in “Resources” mode.
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