Steps to Reproduce

<zk>
  <window mode="modal" title="modal">
        modal
        <textbox/>
    </window>
    <window border="normal" mode="overlapped" title="select an item">
        <combobox readonly="true">
            <comboitem label="a"/>
            <comboitem label="b"/>
            <comboitem label="c"/>
        </combobox>
        <datebox/>
    </window>
</zk>

1. select an comboitem
or click the datebox

Current Result

the combobox doesn't accept the selection

Expected Result

the modal window should be on top of all other non-modal windows, so a user can't operate the combobox.

Debug Information

• This problem is due to the focus-grabbing of a modal window. This behavior causes the popup close so that the clicking doesn't fire onClick event on a comboitem. The clicking doesn't really click a comboitem because of the combobox popup close. You also cannot open a datebox because of the same reason.
  But the focus-grabbing is a reasonable design. So the problem is why a user can operate the combobox, it should be behind the modal window. Because a modal window should be on top of the page and block everything else.

Alternative

• Use Overlapped window

• Make the 2nd window as a modal window

• put the 2nd window as a child of the 1st modal window

Propose solution

provide a widget property to disable the focus grabbing behavior.