awtk/design/default/ui/kb_hex.xml

<keyboard theme="keyboard" x="0" y="bottom" w="100%" h="40%">
  <column style="placeholder" x="0" y="0" w="100%" h="30">
    <button name="close" style="close" x="r:1" y="1" w="28" h="28" text="x" />
  </column>
  <pages x="0" y="30" w="100%" h="-30" active="0">
    <view name="upper" x="0" y="0" w="100%" h="100%" children_layout="default(r=3,c=6,s=2,m=4)">
        <button repeat="300" name="0" text="0"/>
        <button repeat="300" name="1" text="1"/>
        <button repeat="300" name="2" text="2"/>
        <button repeat="300" name="3" text="3"/>
        <button repeat="300" name="4" text="4"/>
        <button repeat="300" name="5" text="5"/>
        <button repeat="300" name="6" text="6"/>
        <button repeat="300" name="7" text="7"/>
        <button repeat="300" name="8" text="8"/>
        <button repeat="300" name="9" text="9"/>
        <button repeat="300" name="A" text="A"/>
        <button repeat="300" name="B" text="B"/>
        <button repeat="300" name="C" text="C"/>
        <button repeat="300" name="D" text="D"/>
        <button repeat="300" name="E" text="E"/>
        <button repeat="300" name="F" text="F"/>
        <button repeat="300" name="X" text="X"/>
        <button repeat="300" name="key:backspace" style="highlight"><image draw_type="icon" image="backspace" x="center" y="middle" w="100%" h="100%"/></button>
    </view>
  </pages>
</keyboard>