dcsimg

Multi column Combo box (2)

First, I want to say, that I saw the article Multicolumn Combobox by Jakawan Ratiwanich, on www.codeguru.com. I inspected the piece of code, and I noticed that exist a array of items. That combo do not accept more than 200 items. In my mind, this is a inconvenient issue. So, I started to create a class CMultiColumnComboBox. Dealing with that very easy. The listbox of original combobox was replaced with a CListCtrl, so, when you will click in button's combo a lsitctrl will appear on the screen.

How user can use this control?

  1. Put in your resource dialog, a custom control, with window class name: MultiColumnComboBox.
  2. Add a new member in dialog class m_combo as CMultiColumnComboBox.
  3. In OnInitDialog subclass this member with
    m_combo.SubclassDlgItem(IDC_CUSTOM1, this),
    
    where IDC_CUSTOM1 is the ID of control in dialog.

How do you insert items?

Very easy. Here a snnipet code to insert:

    CListCtrl* pList = m_combo.GetListCtrl(); // call this function to retieve the listcontrol inside. 
    pList->InsertColumn(0, _T("Col 1"), LVCFMT_LEFT, 48); 
    pList->InsertColumn(1, _T("Col 2"), LVCFMT_LEFT, 48); 
    ... 

As you see, filling control with items is in fact filling the list control. Now the control is ready to use.

Notes:

- If the use want to add checkboxes to the lis control, he can call the following function:
ListView_SetExtendedListViewStyle(m_combo.GetListCtrl()->m_hWnd,
                                  LVS_EX_FULLROWSELECT | LVS_EX_CHECKBOXES ); 

By default, the extended styles of listcontrol are : LVS_EX_GRIDLINES | LVS_EX_FULLROWSELECT.

If you need more help, free feel to ask me.

Download demo project - 31 KB

Download source - 6.6 KB



This article was originally published on June 21st, 1999

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