:orphan:

.. _dropdownBtn2:

======================================
dropdownBtn2
======================================

How to write by SpWML
========================

.. code-block:: none
   
   (dropdownBtn2, sid:ddBtn1)
   +(menu, tag:child1)menu 1
   +(menu, tag:child2)menu 2
   +(menu, tag:child3)menu 3

----

Summary
===============

A block that allows you to create a drop-down button.

It is necessary to set the SID.

This is a flavor of dropdownBtn that allows state management via a String.

It requires tags for all children, but in some cases it can be more convenient than the plain version because the state can be managed via tags.

It has not only `DropdownButton class <https://api.flutter.dev/flutter/material/DropdownButton-class.html>`__ variables that has variables that have been further adjusted to improve usability.

To use this type, it is necessary to set `TagSelectionManager <https://pub.dev/packages/simple_managers>`__  to SpWMLBuilder or SpWML widget.

----

Dart Class Reference
======================
`DropdownBtn2Element class <https://pub.dev/documentation/simple_widget_markup/latest/simple_widget_markup/DropdownBtn2Element-class.html>`__

----

SpWML Parameters
====================

* :ref:`The common<spwml>` parameters.
* :ref:`Parent<multi_child>` parameters.
* hint (String). Sets the hint text when unselected.
* iconNum (String). Set the icon type with `codePoint <https://api.flutter.dev/flutter/material/Icons-class.html>`__ .
* iconSize (double). Set size of icon in px.
* iconColor (String). Color setting. :ref:`The color system<color_system>` .
* splashRadius (double). Set the size of the reaction circle in px on when tapped.
* underlineColor (String). Color setting of underline. :ref:`The color system<color_system>` .
* underlineHeight (double). Set underline size in px.
* isEnabled (bool). Set to false if you want to disable this elements.