ue str">''</span>

        <span class="ruby-identifier">dialog</span>.<span class="ruby-identifier">vbox</span>.<span class="ruby-identifier">pack_start</span>(<span class="ruby-identifier">hbox</span>, <span class="ruby-keyword kw">false</span>)

        <span class="ruby-identifier">dialog</span>.<span class="ruby-identifier">signal_connect</span>(<span class="ruby-value str">'key-press-event'</span><span class="ruby-value str">'key-press-event'</span>, <span class="ruby-operator">&amp;</span><span class