更改子网站的主题

Question

我有三个主题。主题更改工作正常，但是当我转到其他子站点时，主题设置恢复为默认设置。我需要记住其他子站点的主题吗？是否需要其他班级的相关知识，或者只是想念一些东西？

CustomTheme.kt

enum class CustomTheme(val themeName: String)
{
    MATERIAL_DARK("material-dark"),
    MATERIAL_LIGHT("material-light"),
    MY_THEME("mytheme")
}

ThemeSelectorComboBox.kt

    private const val SELECT_THEME = "Select theme:"

class ThemeSelectorComboBox : CustomComponent()
{
    private val comboBox = ComboBox<CustomTheme>()

    init
    {
        init()
    }

    private fun init()
    {
        comboBox.caption = SELECT_THEME
        comboBox.setItems(*CustomTheme.values())
        comboBox.setSelectedItem(CustomTheme.MATERIAL_DARK)
        comboBox.addValueChangeListener { event -> flipTheme(event.value) }

        compositionRoot = comboBox

        comboBox.setSizeUndefined()
        setSizeUndefined()
    }

    private fun flipTheme(theme: CustomTheme?)
    {
        if (theme != null)
        {
            compositionRoot.ui.theme = theme.themeName
        }
    }
}