Advanced MFC Programming

Chapter 7. Common Dialog Boxes
All IDs of the controls are numbers. When writing code to access the controls, we can use these
numbers directly, or we can assign each control a text ID like what we did for sample 7.6\CDB. Actually,
these IDs are all pre-defined, whose symbolic IDs can be found in file “Dlgs.h” (we can find this file under
~DevStudio\VC\Include\ directory). We can check a control’s ID value and search through this file to find
out its symbolic ID. For example, in font dialog box, the combo box under window “Font:” has an ID of
1136 (0x470). In file “Dlgs.h”, we can find:
……
……
//
// Combo boxes.
//
#define cmb1
#define cmb2
#define cmb3
0x0470
0x0471
0x0472
Value 0x0470 is used by cmb1, so we can access this combo box through using symbol cmb1.
Sample 7.8\CDB demonstrates how to use custom dialog template to implement font dialog box. It is
based on sample 7.7\CDB. In the sample, a new command Font Dialog Box | Customize is added to the
application, whose command ID is ID_FONTDIALOGBOX_INITIALIZE. If we execute this command, a font
dialog box whose color selection feature is disabled will be invoked.
In order to implement this dialog box, we need to disable the following two controls: stc4 (Static
control containing string “Color”, whose ID value is 1091) and cmb4 (Combo box for color selection,
whose ID value is 1139).
In the sample, the custom dialog template is IDD_FONT. It contains all the standard controls.
A new class MCFontClass is added to the application through using Class Wizard, its base class is
CFontClass. In the derived class, function OnInitDialog is overridden, within which the above two
controls are disabled:
BOOL MCFontDialog::OnInitDialog()
{
CFontDialog::OnInitDialog();
GetDlgItem(stc4)->ShowWindow(SW_HIDE);
GetDlgItem(cmb4)->ShowWindow(SW_HIDE);
return TRUE;
}
The WM_COMMAND type message handler of command ID_FONTDIALOGBOX_INITIALIZE is CCDBDoc::
OnFontdialogboxCustomize(), which is also added through using Class Wizard. The following is its
implementation:
void CCDBDoc::OnFontdialogboxCustomize()
{
MCFontDialog dlg;
}
dlg.m_cf.lpTemplateName=MAKEINTRESOURCE(IDD_FONT);
dlg.m_cf.Flags|=CF_ENABLETEMPLATE;
if(dlg.DoModal() == IDOK)
{
}
With the above implementation, the font dialog box will not contain color selection feature.
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