errorTemplate static method

Implementation

static String errorTemplate(String err1, [String? err2, String? err3])
{
  String backbutton = NavigationManager().pages.length > 1 ? '<BUTTON onclick="back()" type="outlined" color="white" ><BOX expand="false" pad="8"><ICON icon="arrow_back" color="white" size="40" /></BOX></BUTTON>' : '';

  String xml = '''
  <ERROR linkable="true">
    <BOX width="100%" height="100%" color="#add4de" layout="stack">

      <POS bottom="0" right="0">
        <IMAGE url="assets/assets/images/404.png" width="={SYSTEM.screenwidth} &lt; 700 ? '100%' : '50%'"/>
      </POS>

      <BOX pad="20" center="true">

      <TEXT id="e1" halign="center" size="={SYSTEM.screenwidth} &gt; 700 ? '80' : '50'" color="white" bold="true">
      <VALUE><![CDATA[$err1]]></VALUE>
      </TEXT>
      <TEXT id="e2" halign="center" size="={SYSTEM.screenwidth} &gt; 700 ? '80' : '50'" color="white" visible="=!noe({e2})">
      <VALUE><![CDATA[$err2]]></VALUE>
      </TEXT>
      <TEXT id="e3" halign="center" size="={SYSTEM.screenwidth} &gt; 700 ? '80' : '50'" color="white"  visible="=!noe({e2})">
      <VALUE><![CDATA[$err3]]></VALUE>
      </TEXT>
      <BOX height="20"/>
      $backbutton

      <BOX height="80"/>
      </BOX>

    </BOX>
  </ERROR>
  ''';
  return xml;
}