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Multi column Combo box (2)

Posted by Mihai Filimon on June 21st, 1999

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

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Comments

  • How to use it's list in virtual mode to show 60000+ items (Win98) ?

    Posted by anand_study on 11/28/2006 08:18am

    This is a very nice control. Thanks. Any one tried to use list control of this multi-column combo ? I need to use it's list in virtual mode to show 60000+ items (Win98) ? Thanks for any help/hint. Anand

    Reply

  • List control with header

    Posted by molostov on 06/29/2005 03:59pm

    If list has header and the last item is selected, GetCurrentItem() returns -1.

    Reply

  • Proportionnal to Font Size? 2000 ?

    Posted by Legacy on 10/16/2001 12:00am

    Originally posted by: Michel DAVID

    Hi Mihai.

    I am interrested to know
    1) Does it work on 2000/XP ?
    2) Is it possible to make it higher (That means DY bigger) according to the Dialog font, like a regular CB that grows when the dialog font grows.

    Thank you very much.

    Michel DAVID
    MARNET

    Reply

  • a question

    Posted by Legacy on 09/28/2001 12:00am

    Originally posted by: Assia

    i need some help for creating a combo Box which control the item of a second Dialog Box on the same dialog.

    Unfortunatelly i hd an error occure for every try i made.

    Can someone help me for that.

    thank you in advance.

    Assia from Paris

    Reply

  • mouse wheel is not captured

    Posted by Legacy on 07/03/2001 12:00am

    Originally posted by: Ivaylo G.

    Hi Mihai,
    Thanks for control it is very practical!

    But I find some small bug about mouse wheel. When I use it, that is not captured from control but for dialog window.
    Can you give me some idea for that problem.

    Ivailo


    Reply

  • Minor bug in search

    Posted by Legacy on 10/13/2000 12:00am

    Originally posted by: Cesco 

    The search always begins from the first element, so if two items share the same text the second is never found. Very simple solution: add an int member variable like m_last initialized as -1 in the constructor and modify the Search method like this:

    void CMultiColumnComboBox::Search(LPCTSTR lpszFindItem)

    {

    	if (CListCtrl* pListCtrl = GetListCtrl())

    	{

    		LV_FINDINFO fInfo;

    		 fInfo.flags = LVFI_PARTIAL | LVFI_STRING;

    		 fInfo.psz = lpszFindItem;

    		TRACE("Last was %d\n", m_last);

    		int nItem = pListCtrl->FindItem(&fInfo, m_last);

    		m_last = nItem;

    		SetCurrentItem(nItem);

    		pListCtrl->EnsureVisible(nItem, FALSE); 

    	}

    }

    By the way: Very cool control.

    Reply

  • Minor bug in search

    Posted by Legacy on 10/13/2000 12:00am

    Originally posted by: Cesco 

    The search always begins from the first element, so if two items share the same text the second is never found. Very simple solution: add an int member variable like m_last initialized as -1 in the constructor and modify the Search method like this:

    void CMultiColumnComboBox::Search(LPCTSTR lpszFindItem)

    {

    	if (CListCtrl* pListCtrl = GetListCtrl())

    	{

    		LV_FINDINFO fInfo;

    		 fInfo.flags = LVFI_PARTIAL | LVFI_STRING;

    		 fInfo.psz = lpszFindItem;

    		TRACE("Last was %d\n", m_last);

    		int nItem = pListCtrl->FindItem(&fInfo, m_last);

    		m_last = nItem;

    		SetCurrentItem(nItem);

    		pListCtrl->EnsureVisible(nItem, FALSE); 

    	}

    }

    By the way, Very cool control.

    Cesco

    Reply

  • i want this control!!

    Posted by Legacy on 04/30/2000 12:00am

    Originally posted by: Mark Axmann

    I'm working on VB project that needs this control. How can I get a compiled .ocx of this control?? Or a VB code version.


    Thanks.
    Mark

    Reply

  • When in Combobox, Alt+F4 doesn't close the main window

    Posted by Legacy on 06/10/1999 12:00am

    Originally posted by: Magnus Johansson

    When in the customized combobox, Alt+F4 doesn't close the main window.
    Instead, it opens up the listbox.

    Why is that ?

    Reply

  • Very small change - Make it select EditBox contents when item selected:

    Posted by Legacy on 06/02/1999 12:00am

    Originally posted by: Bryan Napier 

    Just one very minor thing to add to make it more like a combo box..  With a combobox, when you select an item
from the listbox, the contents are copied to the editbox and then selected...  Here is my little change to do
the same:


    void CMultiColumnComboBox::SelectCurrentItem()

    {

    	int nIndex = GetCurrentItem();

    	GetEdit()->SetWindowText(GetListCtrl()->GetItemText(nIndex, m_nColumnKey));\

    	GetEdit()->SetSel(0, -1); // added by Bryan Napier, select entire edit box contents, like a real
combo box

    	//Notify the parent that one item was changed

    	if (nIndex >= 0)

    		if (CWnd* pParent = GetParent())

    			pParent->SendMessage(m_nSelChange, (WPARAM)GetDlgCtrlID(), (LPARAM)m_hWnd);

    }


    Very remedial but who knows, might save someone 2 seconds!

    Reply

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