wpftoolkit - How to prevent a nested WPF popup from closing after an off-screen click -


easiest way explain problem xaml:

<window x:class="nestedpopups.mainwindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" title="mainwindow" height="300" width="525"> <grid>     <togglebutton x:name="b1" verticalalignment="top" width="50" height="50"></togglebutton>     <popup isopen="{binding elementname=b1, path=ischecked}" placementtarget="{binding elementname=b1}" width="100" staysopen="false"            height="200">         <grid>             <datepicker horizontalalignment="center" verticalalignment="center">             </datepicker>         </grid>     </popup> </grid> </window>

when selecting date using date picker, if date selected not overlap window edge desired behaviour i.e. popup stays open. if date selected located past window edge (any date on bottom 2 rows) popup closes. best way prevent behaviour?


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