Class: VarTypeChange

Defined in: packages/blockly/core/events/events_var_type_change.ts:26

Notifies listeners that a variable's type has changed.

Extends

• VarBase

Properties index

Property	Description
workspaceId	The workspace identifier for this event.
group	An ID for the group of events this block is associated with.
recordUndo	Whether this event is undoable or not.
isUiEvent	Whether or not the event is a UI event.
isBlank	Whether or not the event was constructed without necessary parameters (to be populated by fromJson).
varId	The ID of the variable this event references.
type	Type of this event.
oldType	The old type of the variable. Undefined for a blank event.
newType	The new type of the variable. Undefined for a blank event.

Methods index

Method	Description
isNull	Does this event record any change of state?
getEventWorkspace_	Get workspace the event belongs to.
toJson	Encode the event as JSON.
run	Run a variable type change event.

Constructors

Constructor

new VarTypeChange(
   variable?, 
   oldType?, 
   newType?
): VarTypeChange;

Defined in: packages/blockly/core/events/events_var_type_change.ts:34

Parameters

Parameter	Type	Description
variable?	IVariableModel<IVariableState>	The variable whose type changed. Undefined for a blank event.
oldType?	string	The old type of the variable. Undefined for a blank event.
newType?	string	The new type of the variable. Undefined for a blank event.

Returns

VarTypeChange

Overrides

VarBase.constructor

Properties

workspaceId?

optional workspaceId?: string = undefined;

Defined in: packages/blockly/core/events/events_abstract.ts:30

The workspace identifier for this event.

Inherited from

VarBase.workspaceId

---

group

group: string;

Defined in: packages/blockly/core/events/events_abstract.ts:38

An ID for the group of events this block is associated with.

Groups define events that should be treated as an single action from the user's perspective, and should be undone together.

Inherited from

VarBase.group

---

recordUndo

recordUndo: boolean;

Defined in: packages/blockly/core/events/events_abstract.ts:41

Whether this event is undoable or not.

Inherited from

VarBase.recordUndo

---

isUiEvent

isUiEvent: boolean = false;

Defined in: packages/blockly/core/events/events_abstract.ts:44

Whether or not the event is a UI event.

Inherited from

VarBase.isUiEvent

---

isBlank

isBlank: boolean = true;

Defined in: packages/blockly/core/events/events_var_base.ts:28

Whether or not the event was constructed without necessary parameters (to be populated by fromJson).

Inherited from

VarBase.isBlank

---

varId?

optional varId?: string;

Defined in: packages/blockly/core/events/events_var_base.ts:30

The ID of the variable this event references.

Inherited from

VarBase.varId

---

type

type: EventType = EventType.VAR_TYPE_CHANGE;

Defined in: packages/blockly/core/events/events_var_type_change.ts:27

Type of this event.

Overrides

VarBase.type

---

oldType?

optional oldType?: string;

Defined in: packages/blockly/core/events/events_var_type_change.ts:36

The old type of the variable. Undefined for a blank event.

---

newType?

optional newType?: string;

Defined in: packages/blockly/core/events/events_var_type_change.ts:37

The new type of the variable. Undefined for a blank event.

Methods

isNull()

isNull(): boolean;

Defined in: packages/blockly/core/events/events_abstract.ts:91

Does this event record any change of state?

Returns

boolean

True if null, false if something changed.

Inherited from

VarBase.isNull

---

getEventWorkspace_()

getEventWorkspace_(): Workspace;

Defined in: packages/blockly/core/events/events_abstract.ts:111

Get workspace the event belongs to.

Returns

Workspace

The workspace the event belongs to.

Throws

if workspace is null.

Inherited from

VarBase.getEventWorkspace_

---

toJson()

toJson(): VarTypeChangeJson;

Defined in: packages/blockly/core/events/events_var_type_change.ts:47

Encode the event as JSON.

Returns

VarTypeChangeJson

JSON representation.

Overrides

VarBase.toJson

---

run()

run(forward): void;

Defined in: packages/blockly/core/events/events_var_type_change.ts:89

Run a variable type change event.

Parameters

Parameter	Type	Description
forward	boolean	True if run forward, false if run backward (undo).

Returns

void

Overrides

VarBase.run