[[HomePage]] > [[SoftwareIndex|Software Index]] > [[SoftwareDevelopment|Development]] > [[gtkdialog|gtkdialog]] > [[gtkdialogDocTips|Tips and Tricks]]

====9.12 Let <entry> accept (some) numbers only====

The following example shows how to limit the user input to a ##<entry>##. Useful for 'all' kinds of settings.

%%(language-ref)
export MAIN_DIALOG='
<vbox>
<text>
<label>"Enter a number (text will default to 0)"</label>
</text>
<entry editable="true" allow-empty="false">
<input>case $ENTRY in ""|*[^0-9]*) echo 0;; *) echo $ENTRY ;; esac</input>
<variable>ENTRY</variable>
<action signal="focus-out-event">refresh:ENTRY</action>
</entry>
<text>
<label>"Enter a number within [5,15], otherwise:
input will be capped at 15,
floored at 5,
or set to 10 in case of text input"</label>
</text>
<entry editable="true" allow-empty="false">
<input>A=$ENTRY2; case $A in [0-9]*) [[ $A -gt 15 ]] && echo 15 || [[ $A -lt 5 ]] && echo 5 || echo $A ;; *) echo 10;; esac</input>
<variable>ENTRY2</variable>
<action signal="focus-out-event">refresh:ENTRY2</action>
</entry>
<button ok></button>
</vbox>'

gtkdialog -p MAIN_DIALOG
unset MAIN_DIALOG
%%

===@@**#%[[gtkdialogDocTips9.11|❰❰❰ Previous]]#% #%[[gtkdialogDocTips|Index]]#% #%[[gtkdialogDocTips9.13|Next ❱❱❱]]#%**@@===
----
==Categories==
CategoryGtkdialog