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Hi, I try to create readonly combobox. How I can do it easy with CExtComboBox?

Thanks
Dimitar

You can do this by overriding the CExtComboBoxBase::OnSubclassInnerEdit():

void CYourComboBox::OnSubclassInnerEdit()
{
 CExtComboBox::OnSubclassInnerEdit();
 if( m_wndInnerEditHook.GetSafeHwnd() != NULL )
  m_wndInnerEditHook.SetReadOnly();
}

First thanks for quick replay :-). This works when the combo style is CBS_DROPDOWN (not CBS_DROPDOWNLIST) and combo is enabled. The style is not a problem - I can change it at run time, but what can I do when the combo is disabled? I want users to be able to copy the text from disabled combobox.


Thanks
Dimitar

When the combo box gets a WM_ENABLE message, check the bEnable flag and call EnableWindow and SetReadOnly for the edit box.

BEGIN_MESSAGE_MAP(CYourComboBox, CExtComboBox)
 ...
 ON_WM_ENABLE()
 ...
END_MESSAGE_MAP() 
 
void CYourComboBox::OnEnable( BOOL bEnable )
{
 CExtComboBox::OnEnable( bEnable ); 
 if( m_wndInnerEditHook.GetSafeHwnd() == NULL ) 
 {
  m_wndInnerEditHook.EnableWindow( TRUE );
  m_wndInnerEditHook.SetReadOnly( !bEnable );
 }
} 

Thanks again but this sample is not working! The combo and the m_wndInnerEditHook edit control are still disabled (may be because m_wndInnerEditHook is a child window of the combo and we cannot enable child window while the parent is disabled). Any other ideas?


Thanks
Dimitar

We are sorry but this is impossible. You cannot work with the window whose parent window is disabled. The combo box should be enabled.