Dropdown

class in UnityEngine.UI

Implements interfaces:ICancelHandler, IEventSystemHandler, IPointerClickHandler, ISubmitHandler

Description

A standard dropdown that presents a list of options when clicked, of which one can be chosen.

The dropdown component is a Selectable. When an option is chosen, the label and/or image of the control changes to show the chosen option.

When a dropdown event occurs a callback is sent to any registered listeners of onValueChanged.

Properties

alphaFadeSpeed	How fast the drop down will appear and disapear when focus changes.
captionImage	The Image component to hold the image of the currently selected option.
captionText	The Text component to hold the text of the currently selected option.
itemImage	The Image component to hold the image of the item.
itemText	The Text component to hold the text of the item.
onValueChanged	A UnityEvent that is invoked when when a user has clicked one of the options in the dropdown list.
options	The list of possible options. A text string and an image can be specified for each option.
template	The Rect Transform of the template for the dropdown list.
value	The Value is the index number of the current selection in the Dropdown. 0 is the first option in the Dropdown, 1 is the second, and so on.

Public Methods

AddOptions	Add multiple options to the options of the Dropdown based on a list of OptionData objects.
ClearOptions	Clear the list of options in the Dropdown.
Hide	Hide the dropdown list.
OnCancel	Called by a BaseInputModule when a Cancel event occurs.
OnPointerClick	Handling for when the dropdown is 'clicked'.
OnSubmit	What to do when the event system sends a submit Event.
RefreshShownValue	Refreshes the text and image (if available) of the currently selected option.If you have modified the list of options, you should call this method afterwards to ensure that the visual state of the dropdown corresponds to the updated options.
SetValueWithoutNotify	Set index number of the current selection in the Dropdown without invoking onValueChanged callback.
Show	Show the dropdown list.

Protected Methods

CreateBlocker	Override this method to implement a different way to obtain a blocker GameObject.
CreateDropdownList	Override this method to implement a different way to obtain a dropdown list GameObject.
CreateItem	Override this method to implement a different way to obtain an option item.
DestroyBlocker	Override this method to implement a different way to dispose of a blocker GameObject that blocks clicks to other controls while the dropdown list is open.
DestroyDropdownList	Override this method to implement a different way to dispose of a dropdown list GameObject.
DestroyItem	Override this method to implement a different way to dispose of an option item.

Inherited Members

Static Properties

allSelectableCount	Count how many selectables are currently active.
allSelectablesArray	Duplicated array of all the selectable objects currently active in the Scene.

Properties

enabled	Enabled Behaviours are Updated, disabled Behaviours are not.
isActiveAndEnabled	Has the Behaviour had active and enabled called?
gameObject	The game object this component is attached to. A component is always attached to a game object.
tag	The tag of this game object.
transform	The Transform attached to this GameObject.
runInEditMode	Allow a specific instance of a MonoBehaviour to run in edit mode (only available in the editor).
useGUILayout	Disabling this lets you skip the GUI layout phase.
hideFlags	Should the object be hidden, saved with the Scene or modifiable by the user?
name	The name of the object.
animationTriggers	The AnimationTriggers for this selectable object.
animator	Convenience function to get the Animator component on the GameObject.
colors	The ColorBlock for this selectable object.
image	Convenience function that converts the referenced Graphic to a Image, if possible.
interactable	Use to enable or disable the ability to select a selectable UI element (for example, a Button).
navigation	The Navigation setting for this selectable object.
spriteState	The SpriteState for this selectable object.
targetGraphic	Graphic that will be transitioned upon.
transition	The type of transition that will be applied to the targetGraphic when the state changes.

Public Methods

BroadcastMessage	Calls the method named methodName on every MonoBehaviour in this game object or any of its children.
CompareTag	Is this game object tagged with tag ?
GetComponent	Returns the component of Type type if the game object has one attached, null if it doesn't.
GetComponentInChildren	Returns the component of Type type in the GameObject or any of its children using depth first search.
GetComponentInParent	Returns the component of Type type in the GameObject or any of its parents.
GetComponents	Returns all components of Type type in the GameObject.
GetComponentsInChildren	Returns all components of Type type in the GameObject or any of its children.
GetComponentsInParent	Returns all components of Type type in the GameObject or any of its parents.
SendMessage	Calls the method named methodName on every MonoBehaviour in this game object.
SendMessageUpwards	Calls the method named methodName on every MonoBehaviour in this game object and on every ancestor of the behaviour.
CancelInvoke	Cancels all Invoke calls on this MonoBehaviour.
Invoke	Invokes the method methodName in time seconds.
InvokeRepeating	Invokes the method methodName in time seconds, then repeatedly every repeatRate seconds.
IsInvoking	Is any invoke on methodName pending?
StartCoroutine	Starts a coroutine.
StopAllCoroutines	Stops all coroutines running on this behaviour.
StopCoroutine	Stops the first coroutine named methodName, or the coroutine stored in routine running on this behaviour.
GetInstanceID	Returns the instance id of the object.
ToString	Returns the name of the GameObject.
FindSelectable	Finds the selectable object next to this one.
FindSelectableOnDown	Find the selectable object below this one.
FindSelectableOnLeft	Find the selectable object to the left of this one.
FindSelectableOnRight	Find the selectable object to the right of this one.
FindSelectableOnUp	Find the selectable object above this one.
IsHighlighted	Returns whether the selectable is currently 'highlighted' or not.
IsInteractable	UI.Selectable.IsInteractable.
IsPressed	Whether the current selectable is being pressed.
OnDeselect	Unset selection and transition to appropriate state.
OnMove	Determine in which of the 4 move directions the next selectable object should be found.
OnPointerDown	Evaluate current state and transition to pressed state.
OnPointerEnter	Evaluate current state and transition to appropriate state.
OnPointerExit	Evaluate current state and transition to normal state.
OnPointerUp	Evaluate eventData and transition to appropriate state.
OnSelect	Set selection and transition to appropriate state.
Select	Selects this Selectable.
IsActive	Returns true if the GameObject and the Component are active.
IsDestroyed	Returns true if the native representation of the behaviour has been destroyed.

Protected Methods

DoStateTransition	Transition the Selectable to the entered state.
InstantClearState	Clear any internal state from the Selectable (used when disabling).
OnDisable	See MonoBehaviour.OnDisable.
Awake	See MonoBehaviour.Awake.
OnBeforeTransformParentChanged	See MonoBehaviour.OnBeforeTransformParentChanged.
OnCanvasGroupChanged	See MonoBehaviour.OnCanvasGroupChanged.
OnCanvasHierarchyChanged	Called when the state of the parent Canvas is changed.
OnDestroy	See MonoBehaviour.OnDestroy.
OnDidApplyAnimationProperties	See LayoutGroup.OnDidApplyAnimationProperties.
OnDisable	See MonoBehaviour.OnDisable.
OnEnable	See MonoBehaviour.OnEnable.
OnRectTransformDimensionsChange	This callback is called if an associated RectTransform has its dimensions changed.
OnTransformParentChanged	See MonoBehaviour.OnRectTransformParentChanged.
OnValidate	See MonoBehaviour.OnValidate.
Reset	See MonoBehaviour.Reset.
Start	See MonoBehaviour.Start.

Static Methods

print	Logs message to the Unity Console (identical to Debug.Log).
Destroy	Removes a gameobject, component or asset.
DestroyImmediate	Destroys the object obj immediately. You are strongly recommended to use Destroy instead.
DontDestroyOnLoad	Do not destroy the target Object when loading a new Scene.
FindObjectOfType	Returns the first active loaded object of Type type.
FindObjectsOfType	Returns a list of all active loaded objects of Type type.
Instantiate	Clones the object original and returns the clone.
AllSelectablesNoAlloc	Non allocating option to get all the selectable objects currently active in the Scene.

Operators

bool	Does the object exist?
operator !=	Compares if two objects refer to a different object.
operator ==	Compares two object references to see if they refer to the same object.

Messages

Awake	Awake is called when the script instance is being loaded.
FixedUpdate	Frame-rate independent MonoBehaviour.FixedUpdate message for physics calculations.
LateUpdate	LateUpdate is called every frame, if the Behaviour is enabled.
OnAnimatorIK	Callback for setting up animation IK (inverse kinematics).
OnAnimatorMove	Callback for processing animation movements for modifying root motion.
OnApplicationFocus	Sent to all GameObjects when the player gets or loses focus.
OnApplicationPause	Sent to all GameObjects when the application pauses.
OnApplicationQuit	Sent to all game objects before the application quits.
OnAudioFilterRead	If OnAudioFilterRead is implemented, Unity will insert a custom filter into the audio DSP chain.
OnBecameInvisible	OnBecameInvisible is called when the renderer is no longer visible by any camera.
OnBecameVisible	OnBecameVisible is called when the renderer became visible by any camera.
OnCollisionEnter	OnCollisionEnter is called when this collider/rigidbody has begun touching another rigidbody/collider.
OnCollisionEnter2D	Sent when an incoming collider makes contact with this object's collider (2D physics only).
OnCollisionExit	OnCollisionExit is called when this collider/rigidbody has stopped touching another rigidbody/collider.
OnCollisionExit2D	Sent when a collider on another object stops touching this object's collider (2D physics only).
OnCollisionStay	:ref::OnCollisionStay is called once per frame for every collider/rigidbody that is touching rigidbody/collider.
OnCollisionStay2D	Sent each frame where a collider on another object is touching this object's collider (2D physics only).
OnConnectedToServer	Called on the client when you have successfully connected to a server.
OnControllerColliderHit	OnControllerColliderHit is called when the controller hits a collider while performing a Move.
OnDestroy	Destroying the attached Behaviour will result in the game or Scene receiving OnDestroy.
OnDisable	This function is called when the behaviour becomes disabled.
OnDisconnectedFromServer	Called on the client when the connection was lost or you disconnected from the server.
OnDrawGizmos	Implement OnDrawGizmos if you want to draw gizmos that are also pickable and always drawn.
OnDrawGizmosSelected	Implement OnDrawGizmosSelected to draw a gizmo if the object is selected.
OnEnable	This function is called when the object becomes enabled and active.
OnFailedToConnect	Called on the client when a connection attempt fails for some reason.
OnFailedToConnectToMasterServer	Called on clients or servers when there is a problem connecting to the MasterServer.
OnGUI	OnGUI is called for rendering and handling GUI events.
OnJointBreak	Called when a joint attached to the same game object broke.
OnJointBreak2D	Called when a Joint2D attached to the same game object breaks.
OnMasterServerEvent	Called on clients or servers when reporting events from the MasterServer.
OnMouseDown	OnMouseDown is called when the user has pressed the mouse button while over the GUIElement or Collider.
OnMouseDrag	OnMouseDrag is called when the user has clicked on a GUIElement or Collider and is still holding down the mouse.
OnMouseEnter	Called when the mouse enters the GUIElement or Collider.
OnMouseExit	Called when the mouse is not any longer over the GUIElement or Collider.
OnMouseOver	Called every frame while the mouse is over the GUIElement or Collider.
OnMouseUp	OnMouseUp is called when the user has released the mouse button.
OnMouseUpAsButton	OnMouseUpAsButton is only called when the mouse is released over the same GUIElement or Collider as it was pressed.
OnNetworkInstantiate	Called on objects which have been network instantiated with Network.Instantiate.
OnParticleCollision	OnParticleCollision is called when a particle hits a Collider.
OnParticleSystemStopped	OnParticleSystemStopped is called when all particles in the system have died, and no new particles will be born. New particles cease to be created either after Stop is called, or when the duration property of a non-looping system has been exceeded.
OnParticleTrigger	OnParticleTrigger is called when any particles in a Particle System meet the conditions in the trigger module.
OnPlayerConnected	Called on the server whenever a new player has successfully connected.
OnPlayerDisconnected	Called on the server whenever a player disconnected from the server.
OnPostRender	OnPostRender is called after a camera finished rendering the Scene.
OnPreCull	OnPreCull is called before a camera culls the Scene.
OnPreRender	OnPreRender is called before a camera starts rendering the Scene.
OnRenderImage	OnRenderImage is called after all rendering is complete to render image.
OnRenderObject	OnRenderObject is called after camera has rendered the Scene.
OnSerializeNetworkView	Used to customize synchronization of variables in a script watched by a network view.
OnServerInitialized	Called on the server whenever a Network.InitializeServer was invoked and has completed.
OnTransformChildrenChanged	This function is called when the list of children of the transform of the GameObject has changed.
OnTransformParentChanged	This function is called when the parent property of the transform of the GameObject has changed.
OnTriggerEnter	OnTriggerEnter is called when the GameObject collides with another GameObject.
OnTriggerEnter2D	Sent when another object enters a trigger collider attached to this object (2D physics only).
OnTriggerExit	OnTriggerExit is called when the Collider other has stopped touching the trigger.
OnTriggerExit2D	Sent when another object leaves a trigger collider attached to this object (2D physics only).
OnTriggerStay	OnTriggerStay is called once per physics update for every Collider other that is touching the trigger.
OnTriggerStay2D	Sent each frame where another object is within a trigger collider attached to this object (2D physics only).
OnValidate	This function is called when the script is loaded or a value is changed in the Inspector (Called in the editor only).
OnWillRenderObject	OnWillRenderObject is called for each camera if the object is visible and not a UI element.
Reset	Reset to default values.
Start	Start is called on the frame when a script is enabled just before any of the Update methods are called the first time.
Update	Update is called every frame, if the MonoBehaviour is enabled.

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Scripting API

Dropdown

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Description

Properties

Public Methods

Protected Methods

Inherited Members

Static Properties

Properties

Public Methods

Protected Methods

Static Methods

Operators

Messages