Custom Draw Buttons '& A smarter Groupbox

What's in this Code?

Sometimes when you have a number of radio buttons in a group you don't want to deal with them individually. CRadioGroup is a simple class that allows you to access any radios bounded by a groupbox as a 1 based array.

Class hierarchy:

How to use the CRadioGroup?

Subclassing the groupbox:

void CMyDialog::DoDataExchange(CDataExchange* pDX)
{
    CDialog::DoDataExchange(pDX);

    //{{AFX_DATA_MAP(CCRadioGroupSampleDlg)
    DDX_Control(pDX, IDC_GROUP1, m_Group1);
    //AFX_DATA_MAP
}

ON_BN_CLICKED(IDC_GROUP1, OnGroup1)

The code for CRadioGroup is in CRadioGroup.cpp/.h  (See source.)
 

How does the CRadioGroup work?

2. CCustomButton: A generic user draw button

Class hierarchy:

How do you use the CCustomButton &  CCustomIconButton ?

1. To use CCustomButton simply override the following 2 methods :

virtual BOOL IsCustom()const {return TRUE;} // Return TRUE so that Draw() is called
virtual void Draw(CDC*,CRect,const CCustomButtonData& state)
{
   //Draw the button based on state flags in state
}

(a). Subclass your button with a CCustomIconButton.
(b). In OnInitDialog() call:  myButton.LoadIcon(), Passing the ID of a strip bitmap, the offset of the button         image (again 1 based) and the size of the button image.

eg. myButton.LoadIcon(IDB_MYBITMAP,nOffset,CSize(24,23));

How do the CCustomButton and CCustomIconButton classes work?

The CCustomButton overrides all of the methods and message handlers that are needed to prevent the underlying button drawing itself. If the IsCustom() method returns FALSE then the button will look and behave as normal. But if IsCustom() returns TRUE then the Draw() method is called for drawing the button. The current button state is passed to the Draw() method via the CCustomButtonData class.

For more information, please refer to the comments in the source code.

Download source and sample - 24 KB