awtk/design/default/ui/combo_box.xml

<window anim_hint="htranslate">
  <combo_box right_margin="30" x="10" y="5" w="200" h="30" text="left" 
    open_im_when_focused="false"
    options="left;center;right\\x3b;">
    <button style="combobox_down" x="right:5" y="middle" w="20" h="20"/>
  </combo_box>
  <combo_box open_window="color" readonly="true" x="10" y="50" w="200" h="30" text="red"/>
  <combo_box_ex x="10" y="100" w="200" h="30" options="1;2;3;4;5;6;7;8;9;0;11;22;33;44;55" theme_of_popup="number"/>

  <combo_box style="auto_center" readonly="true" x="5" y="bottom:5" w="45%" h="30" options="tcp://localhost:80;serial://COM1;serial://COM2"/>
  <combo_box open_window="language" readonly="true" x="5" y="bottom:50" w="45%" h="30" tr_text="english"/>
  
  <combo_box style="auto_center" readonly="true" x="right:5" y="bottom:5" w="45%" h="30" text="ok" 
    localize_options="false"
    options="1:ok;2:cancel;"/>

  <combo_box_ex x="0" y="middle:-60" w="100" h="30" options="seperator.basic;33;44;55;seperator.user;hello;world;it is long option" text="33" readonly="true"/>
  <combo_box open_window="fruit" x="r" y="middle:-60" w="150" h="30" readonly="true" text="apple  $5.0"/>

  <label name="old_value" x="center" y="middle:-20" w="50%" h="30" text=""/>
  <label name="value" x="center" y="middle:20" w="50%" h="30" text=""/>
  <button name="close" self_layout="default(x=center,y=m:50,w=50%,h=30)" 
    floating="true" text="Close"/>
  <combo_box_ex name="combo_box_ex_for_clone" readonly="true" x="0" y="middle:100" w="100" h="30" options="1;2;3;4;5;6;7;8" theme_of_popup="number"/>
  <button name="clone_combo_box_ex" self_layout="default(x=center,y=m:100,w=50,h=30)" floating="true" text="Clone"/>
</window>