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    Class Dropdown

    Dropdown UI element.

    Inheritance
    object
    CallbackEventHandler
    Focusable
    VisualElement
    BaseVisualElement
    ExVisualElement
    Picker
    Picker<DropdownItem, DropdownItem>
    Dropdown
    Implements
    IEventHandler
    ITransform
    ITransitionAnimations
    IExperimentalFeatures
    IVisualElementScheduler
    IResolvedStyle
    IContextOverrideElement
    IInputElement<IEnumerable<int>>
    IValidatableElement<IEnumerable<int>>
    INotifyValueChanged<IEnumerable<int>>
    ISizeableElement
    IPressable
    Inherited Members
    Picker<DropdownItem, DropdownItem>.makeItem
    Picker<DropdownItem, DropdownItem>.bindItem
    Picker<DropdownItem, DropdownItem>.unbindItem
    Picker<DropdownItem, DropdownItem>.makeTitle
    Picker<DropdownItem, DropdownItem>.bindTitle
    Picker<DropdownItem, DropdownItem>.RefreshTitleUI()
    Picker<DropdownItem, DropdownItem>.OnRequestItemCreation(int)
    Picker<DropdownItem, DropdownItem>.OnUnbindItem(VisualElement, int)
    Picker<DropdownItem, DropdownItem>.GetPickerItem(int)
    Picker.titleContainerUssClassName
    Picker.titleUssClassName
    Picker.trailingContainerUssClassName
    Picker.caretUssClassName
    Picker.sizeUssClassName
    Picker.emphasizedUssClassName
    Picker.appuiPickerMenu
    Picker.m_Items
    Picker.m_Value
    Picker.m_TitleContainer
    Picker.closeOnSelection
    Picker.clickable
    Picker.defaultMessage
    Picker.defaultValue
    Picker.sourceItems
    Picker.size
    Picker.emphasized
    Picker.selectionType
    Picker.selectedIndex
    Picker.invalid
    Picker.validateValue
    Picker.SetValueWithoutNotify(IEnumerable<int>)
    Picker.value
    Picker.Refresh()
    Picker.RefreshUI()
    Picker.RefreshListUI()
    Picker.RefreshTitleUI()
    Picker.OnRequestItemCreation(int)
    Picker.OnUnbindItem(VisualElement, int)
    Picker.GetSizeUssClassName(Size)
    ExVisualElement.contentContainer
    ExVisualElement.outlineColor
    ExVisualElement.backgroundColor
    ExVisualElement.passMask
    BaseVisualElement.contextPrefix
    BaseVisualElement.scaleOverride
    BaseVisualElement.themeOverride
    BaseVisualElement.langOverride
    BaseVisualElement.layoutDirectionOverride
    BaseVisualElement.preferredTooltipPlacementOverride
    BaseVisualElement.tooltipDelayMsOverride
    BaseVisualElement.GetLayoutDirectionUssClassName(Dir)
    VisualElement.disabledUssClassName
    VisualElement.ExecuteDefaultAction(EventBase)
    VisualElement.Focus()
    VisualElement.SendEvent(EventBase)
    VisualElement.SetEnabledFromHierarchy(bool)
    VisualElement.SetEnabled(bool)
    VisualElement.MarkDirtyRepaint()
    VisualElement.ContainsPoint(Vector2)
    VisualElement.Overlaps(Rect)
    VisualElement.DoMeasure(float, VisualElement.MeasureMode, float, VisualElement.MeasureMode)
    VisualElement.ToString()
    VisualElement.GetClasses()
    VisualElement.ClearClassList()
    VisualElement.AddToClassList(string)
    VisualElement.RemoveFromClassList(string)
    VisualElement.ToggleInClassList(string)
    VisualElement.EnableInClassList(string, bool)
    VisualElement.ClassListContains(string)
    VisualElement.FindAncestorUserData()
    VisualElement.Add(VisualElement)
    VisualElement.Insert(int, VisualElement)
    VisualElement.Remove(VisualElement)
    VisualElement.RemoveAt(int)
    VisualElement.Clear()
    VisualElement.ElementAt(int)
    VisualElement.IndexOf(VisualElement)
    VisualElement.Children()
    VisualElement.Sort(Comparison<VisualElement>)
    VisualElement.BringToFront()
    VisualElement.SendToBack()
    VisualElement.PlaceBehind(VisualElement)
    VisualElement.PlaceInFront(VisualElement)
    VisualElement.RemoveFromHierarchy()
    VisualElement.GetFirstOfType<T>()
    VisualElement.GetFirstAncestorOfType<T>()
    VisualElement.Contains(VisualElement)
    VisualElement.FindCommonAncestor(VisualElement)
    VisualElement.viewDataKey
    VisualElement.userData
    VisualElement.canGrabFocus
    VisualElement.focusController
    VisualElement.usageHints
    VisualElement.transform
    VisualElement.layout
    VisualElement.contentRect
    VisualElement.paddingRect
    VisualElement.worldBound
    VisualElement.localBound
    VisualElement.worldTransform
    VisualElement.pickingMode
    VisualElement.name
    VisualElement.enabledInHierarchy
    VisualElement.enabledSelf
    VisualElement.visible
    VisualElement.generateVisualContent
    VisualElement.experimental
    VisualElement.hierarchy
    VisualElement.cacheAsBitmap
    VisualElement.parent
    VisualElement.panel
    VisualElement.visualTreeAssetSource
    VisualElement.this[int]
    VisualElement.childCount
    VisualElement.schedule
    VisualElement.style
    VisualElement.customStyle
    VisualElement.styleSheets
    VisualElement.tooltip
    VisualElement.resolvedStyle
    Focusable.Blur()
    Focusable.focusable
    Focusable.tabIndex
    Focusable.delegatesFocus
    CallbackEventHandler.RegisterCallback<TEventType>(EventCallback<TEventType>, TrickleDown)
    CallbackEventHandler.RegisterCallback<TEventType, TUserArgsType>(EventCallback<TEventType, TUserArgsType>, TUserArgsType, TrickleDown)
    CallbackEventHandler.UnregisterCallback<TEventType>(EventCallback<TEventType>, TrickleDown)
    CallbackEventHandler.UnregisterCallback<TEventType, TUserArgsType>(EventCallback<TEventType, TUserArgsType>, TrickleDown)
    CallbackEventHandler.HandleEvent(EventBase)
    CallbackEventHandler.HasTrickleDownHandlers()
    CallbackEventHandler.HasBubbleUpHandlers()
    CallbackEventHandler.ExecuteDefaultActionAtTarget(EventBase)
    object.Equals(object)
    object.Equals(object, object)
    object.GetHashCode()
    object.GetType()
    object.MemberwiseClone()
    object.ReferenceEquals(object, object)
    Namespace: Unity.AppUI.UI
    Assembly: Unity.AppUI.dll
    Syntax
    public class Dropdown : Picker<DropdownItem, DropdownItem>, IEventHandler, ITransform, ITransitionAnimations, IExperimentalFeatures, IVisualElementScheduler, IResolvedStyle, IContextOverrideElement, IInputElement<IEnumerable<int>>, IValidatableElement<IEnumerable<int>>, INotifyValueChanged<IEnumerable<int>>, ISizeableElement, IPressable

    Constructors

    Dropdown()

    Default constructor.

    Declaration
    public Dropdown()

    Dropdown(IList, Action<DropdownItem, int>, Action<DropdownItem, IEnumerable<int>>, int[])

    Construct a Dropdown UI element with a provided dynamic collection of items.

    Declaration
    public Dropdown(IList items, Action<DropdownItem, int> bindItemFunc = null, Action<DropdownItem, IEnumerable<int>> bindTitleFunc = null, int[] defaultIndices = null)
    Parameters
    Type Name Description
    IList items

    An items collection.

    Action<DropdownItem, int> bindItemFunc

    The binding function used to populate display data for each item.

    Action<DropdownItem, IEnumerable<int>> bindTitleFunc

    The binding function used to populate display data for the title.

    int[] defaultIndices

    The selected index by default.

    Fields

    ussClassName

    The Dropdown main styling class.

    Declaration
    public const string ussClassName = "appui-dropdown"
    Field Value
    Type Description
    string

    Properties

    bindTitle

    A method that will be called to bind the title.

    Declaration
    public Action<DropdownItem, IEnumerable<int>> bindTitle { get; set; }
    Property Value
    Type Description
    Action<DropdownItem, IEnumerable<int>>

    Methods

    ApplyMultiSelectionMessage(LocalizedTextElement, int)

    Apply the Picker localized multi selection message.

    Declaration
    protected virtual void ApplyMultiSelectionMessage(LocalizedTextElement element, int selectionCount)
    Parameters
    Type Name Description
    LocalizedTextElement element

    The LocalizedTextElement to apply the message to.

    int selectionCount

    The number of selected items.

    Implements

    IEventHandler
    ITransform
    ITransitionAnimations
    IExperimentalFeatures
    IVisualElementScheduler
    IResolvedStyle
    IContextOverrideElement
    IInputElement<TValueType>
    IValidatableElement<TValueType>
    INotifyValueChanged<T>
    ISizeableElement
    IPressable

    Extension Methods

    VisualElementExtensions.FindNavController(VisualElement)
    VisualElementExtensions.GetChildren<T>(VisualElement, bool)
    VisualElementExtensions.GetContextProvider<T>(VisualElement)
    VisualElementExtensions.GetContext<T>(VisualElement)
    VisualElementExtensions.GetPreferredTooltipPlacement(VisualElement)
    VisualElementExtensions.GetSelfContext<T>(VisualElement)
    VisualElementExtensions.GetTooltipTemplate(VisualElement)
    VisualElementExtensions.IsContextProvider<T>(VisualElement)
    VisualElementExtensions.ProvideContext<T>(VisualElement, T)
    VisualElementExtensions.RegisterContextChangedCallback<T>(VisualElement, EventCallback<ContextChangedEvent<T>>)
    VisualElementExtensions.SetPreferredTooltipPlacement(VisualElement, OptionalEnum<PopoverPlacement>)
    VisualElementExtensions.SetTooltipTemplate(VisualElement, VisualElement)
    VisualElementExtensions.UnregisterContextChangedCallback<T>(VisualElement, EventCallback<ContextChangedEvent<T>>)
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