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DCCOMBOBOX
Posted: Fri Feb 14, 2025 10:23 am
by MIGUELON
Hi everyone, does anyone know how I can disable pressing the up or down arrow when the focus is on a DCCOMBOBOX?
I want to be able to select only with the right button.
Regards and thanks for your help
Re: DCCOMBOBOX
Posted: Fri Feb 14, 2025 11:06 am
by rdonnay
It would require a change to express++ source code to allow a select from the right mouse button.
Do you also want to disable the left mouse button?
Re: DCCOMBOBOX
Posted: Fri Feb 14, 2025 1:03 pm
by MIGUELON
Thanks for the reply Roger
I don't want to disable any mouse buttons I just want the Up or Down keys to not be able to select any option from the dccombobox array. I use Xbase 1.9
Re: DCCOMBOBOX
Posted: Sat Feb 15, 2025 9:13 am
by rdonnay
Here is an example of how to disable keys in the combobox using a custom event handler:
Code: Select all
#INCLUDE "dcdialog.ch"
#INCLUDE "appevent.CH"
FUNCTION Main()
LOCAL GetList[0], GetOptions, aComboCaptions, aComboValues, ;
bGetSet, cComboCaption, nComboValue, oComboBox
aComboCaptions := { ;
'Nineteen Ninety Seven' , ;
'Nineteen Ninety Eight' , ;
'Nineteen Ninety Nine' , ;
'Two Thousand' , ;
'Two Thousand One' , ;
'Two Thousand Two' , ;
'Two Thousand Three' , ;
'Two Thousand Four' , ;
'Two Thousand Five' }
aComboValues := { ;
1997, ;
1998, ;
1999, ;
2000, ;
2001, ;
2002, ;
2003, ;
2004, ;
2005 }
cComboCaption := ''
nComboValue := 2002
@ 1,1 DCSAY 'Choose a year' SAYSIZE 0 SAYBOTTOM
bGetSet := DC_ComboGetSetBlock( aComboCaptions, aComboValues, ;
@cComboCaption, @nComboValue )
@ 1, DCGUI_COL + 10 DCCOMBOBOX bGetSet ;
LIST aComboCaptions ;
SIZE 20, 10 ;
OBJECT oComboBox ;
ITEMSELECTED DC_ComboSelectedBlock( aComboCaptions, aComboValues, ;
@cComboCaption, @nComboValue )
DCREAD GUI FIT ADDBUTTONS TITLE 'Combobox Test' HANDLER myHandler REFERENCE @oComboBox
DCMSGBOX 'You selected the year ' + Alltrim(Str(nComboValue))
RETURN nil
* ------------
PROC appsys
RETURN
* ------------
STATIC FUNCTION myHandler(nEvent,mp1,mp2,oXbp,oDlg,GetList,oComboBox)
IF nEvent == xbeP_Keyboard .AND. oXbp == oComboBox
RETURN DCGUI_IGNORE
ENDIF
RETURN DCGUI_NONE
Re: DCCOMBOBOX
Posted: Sun Feb 16, 2025 1:24 pm
by MIGUELON
Thank you very much Roger, this is the solution I was looking for.
I had a dccombobox and a dcbrowse in the same window, when I moved through the rows of the dcbrowse with the up or down keys it sometimes jumps to the dccombobox and starts selecting options from the array.
The problem is solved

Re: DCCOMBOBOX
Posted: Mon Feb 17, 2025 6:44 am
by SlavkoDam
By your description, the cause of the problem is in dcbrowse and not in dccombobox???? You should handle dcbrowse keys and not dccombobox keys.