ComboBox with tabs

[Ian Docksey]

I have tried the following to put tabs in a combobox with no success.
Has anyone some suggestions?

Thanks, Ian

CONTROL ADD COMBOBOX, hDlg, %IDC_PRODUCT, , 120, 205, 235, 235, %WS_CHILD _
OR %WS_VISIBLE OR %WS_TABSTOP OR %WS_VSCROLL OR %CBS_DROPDOWN OR _
%CBS_SORT OR %CBS_UPPERCASE, %WS_EX_LEFT OR %WS_EX_LTRREADING OR _
%WS_EX_RIGHTSCROLLBAR

DIM tabstops(2) AS LONG
LOCAL a AS LONG
FOR a=0 TO 2
tabstops(a)=VAL(READ$(a+1))
NEXT a
DATA 450, 222, 300
STATIC cbi AS COMBOBOXINFO
STATIC hCombo, hComboEdit AS LONG
hCombo = GetDlgItem(hDlg, %IDC_PRODUCT)
cbi.cbSize = SIZEOF(cbi)
GetComboBoxInfo(hCombo, cbi)
hComboEdit = cbi.hwndList
SendMessage hComboEdit, %LB_SETTABSTOPS, 2, VARPTR(tabstops(0))
'then add data to the combobox with
COMBOBOX ADD hDlg, %IDC_PRODUCT, PARSE$(txt, 1) & $TAB & PARSE$(txt, 2) & $TAB & PARSE$(txt, 3)

[George Bleck]

perhaps because LB_SETTABSTOPS is a listbox message and you are working with a combobox? (yes i know its a text box/lisbox hybrid)

I do not see an equivalent CB_SETTABSTOPS so going to assume that it's not possible. Is it not a true listbox and only a subset of the capabilities?

A little quick googling found this http://www.xtremevbtalk.com/showthread.php?t=20632

Not a definitive answer but it points at "not possible".

[Michael Mattias]

data 450, 222, 300

the tab stops must be sorted in ascending order; backward tabs are not allowed.

[Dave Biggs]

Bad news I'm afraid..

      hComboList = cbi.hwndList
      SendMessage hComboList, %LB_SETTABSTOPS, 2, VARPTR(tabstops(0))
      MsgBox "1: " + ErrorMsg(GetLastError),,"System Error"
      'Result > [COLOR=red]1:  1434 This list box does not support tab stops[/COLOR].

Seems that the Listbox part of the combo box is not created with the LBS_USETABSTOPS style.
Listbox Styles generally (also applies to Listboxes that are part of a Combobox, I checked) cannot be changed once the Listbox has been created - So SetWindowLong is out

Possibly interesting work-around ideas here.. http://vbnet.mvps.org/index.html?cod...tabbedlist.htm

[Christopher Carroll]

Ian

You need to use CBS_OWNERDRAWFIXED in the combobox definition, then draw the text in the WM_DRAWITEM part of the main window's callback.

See http://www.powerbasic.com/support/pb...ad.php?t=40468 for an example.

Christopher

[Dave Biggs]

Nice one Christopher!

Here's a link to Borje's compilable DDT example..

http://www.powerbasic.com/support/pbforums/showthread.php?t=24113