Class: Block

Blockly.Block

class   static

Class for one block. Not normally called directly, workspace.newBlock() is preferred.

Constructor

Block

new Block(workspace, prototypeName, opt_id)

Parameter
workspace	The block's workspace. Value must not be null.
prototypeName	Name of the language object containing type-specific functions for this block. Value must not be null.
opt_id	Optional Optional ID. Use this ID if provided, otherwise create a new ID.

Implements

Blockly.IASTNodeLocation

Blockly.IDeletable

Throws

When the prototypeName is not valid or not allowed.

Properties

COLLAPSED_FIELD_NAME

constant   static

string

The language-neutral ID given to the collapsed field.

COLLAPSED_INPUT_NAME

constant   static

string

The language-neutral ID given to the collapsed input.

childBlocks_

protected

non-null Array of non-null Blockly.Block

collapsed_

protected

boolean

colour_

protected

string

Colour of the block in '#RRGGBB' format.

comment

(string or Blockly.Comment)

A string representing the comment attached to this block.

Deprecated

August 2019. Use getCommentText instead.

commentModel

package

non-null Blockly.Block.CommentModel

A model of the comment attached to this block.

contextMenu

boolean

data

nullable string

Optional text data that round-trips between blocks and XML. Has no effect. May be used by 3rd parties for meta information.

disposed

package

boolean

Has this block been disposed of?

domToMutation

(undefined or nullable function(non-null Element))

An optional deserialization method for defining how to deserialize the mutation state from XML. This must be coupled with defining mutationToDom.

getDeveloperVariables

(undefined or nullable function() returns non-null Array of string)

An optional property for declaring developer variables. Return a list of variable names for use by generators. Developer variables are never shown to the user, but are declared as global variables in the generated code.

hat

(string or undefined)

Name of the type of hat.

helpUrl

(string or function())

String for block help, or function that returns a URL. Null for no help.

id

string

init

(undefined or nullable function())

An optional method called during initialization.

inputList

non-null Array of non-null Blockly.Input

inputsInline

(boolean or undefined)

inputsInlineDefault

(boolean or undefined)

isInFlyout

boolean

isInMutator

boolean

isInsertionMarker_

protected

boolean

True if this block is an insertion marker.

loadExtraState

(undefined or nullable function(any type))

An optional serialization method for defining how to deserialize the block's extra state (eg mutation state) from something JSON compatible. This must be coupled with defining saveExtraState.

mutationToDom

(undefined or nullable function() returns non-null Element)

An optional serialization method for defining how to serialize the mutation state to XML. This must be coupled with defining domToMutation.

nextConnection

Blockly.Connection

onchange

(undefined or nullable function(Blockly.Events.Abstract))

An optional callback method to use whenever the block's parent workspace changes. This is usually only called from the constructor, the block type initializer function, or an extension initializer function.

outputConnection

Blockly.Connection

outputShape_

protected

nullable number

parentBlock_

protected

Blockly.Block

previousConnection

Blockly.Connection

rendered

nullable boolean

RTL

boolean

saveExtraState

(undefined or nullable function() returns any type)

An optional serialization method for defining how to serialize the block's extra state (eg mutation state) to something JSON compatible. This must be coupled with defining loadExtraState.

statementInputCount

package

number

A count of statement inputs on the block.

styleName_

protected

string

Name of the block style.

suppressPrefixSuffix

nullable boolean

An optional property for suppressing adding STATEMENT_PREFIX and STATEMENT_SUFFIX to generated code.

tooltip

non-null Blockly.Tooltip.TipInfo

type

string

workspace

non-null Blockly.Workspace

Methods

allInputsFilled

allInputsFilled(opt_shadowBlocksAreFilled) returns boolean

Recursively checks whether all statement and value inputs are filled with blocks. Also checks all following statement blocks in this stack.

Parameter
opt_shadowBlocksAreFilled	Optional boolean An optional argument controlling whether shadow blocks are counted as filled. Defaults to true.

Returns

boolean True if all inputs are filled, false otherwise.

appendDummyInput

appendDummyInput(opt_name) returns Blockly.Input

Shortcut for appending a dummy input row.

Parameter
opt_name	Optional string Language-neutral identifier which may used to find this input again. Should be unique to this block.

Returns

non-null Blockly.Input The input object created.

appendInput_

protected

appendInput_(type, name) returns Blockly.Input

Add a value input, statement input or local variable to this block.

Parameter
type	number One of Blockly.Blockly.inputTypes.
name	string Language-neutral identifier which may used to find this input again. Should be unique to this block.

Returns

non-null Blockly.Input The input object created.

appendStatementInput

appendStatementInput(name) returns Blockly.Input

Shortcut for appending a statement input row.

Parameter
name	string Language-neutral identifier which may used to find this input again. Should be unique to this block.

Returns

non-null Blockly.Input The input object created.

appendValueInput

appendValueInput(name) returns Blockly.Input

Shortcut for appending a value input row.

Parameter
name	string Language-neutral identifier which may used to find this input again. Should be unique to this block.

Returns

non-null Blockly.Input The input object created.

bumpNeighbours

bumpNeighbours()

Bump unconnected blocks out of alignment. Two blocks which aren't actually connected should not coincidentally line up on screen.

dispose

dispose(healStack, _animate)

Dispose of this block.

Parameter
healStack	boolean If true, then try to heal any gap by connecting the next statement with the previous statement. Otherwise, dispose of all children of this block.
_animate	Optional boolean If true, show a disposal animation and sound.

doInit_

protected

doInit_()

Calls the init() function and handles associated event firing, etc.

getChildren

getChildren(ordered) returns Array of non-null Block

Find all the blocks that are directly nested inside this one. Includes value and statement inputs, as well as any following statement. Excludes any connection on an output tab or any preceding statement. Blocks are optionally sorted by position; top to bottom.

Parameter
ordered	boolean Sort the list if true.

Returns

non-null Array of non-null Block Array of blocks.

getColour

getColour() returns string

Get the colour of a block.

Returns

string #RRGGBB string.

getCommentText

getCommentText() returns string

Returns the comment on this block (or null if there is no comment).

Returns

nullable string Block's comment.

getConnections_

package

getConnections_(_all) returns Array of non-null Blockly.Connection

Returns all connections originating from this block.

Parameter
_all	boolean If true, return all connections even hidden ones.

Returns

non-null Array of non-null Blockly.Connection Array of connections.

getDescendants

getDescendants(ordered) returns Array of non-null Block

Find all the blocks that are directly or indirectly nested inside this one. Includes this block in the list. Includes value and statement inputs, as well as any following statements. Excludes any connection on an output tab or any preceding statements. Blocks are optionally sorted by position; top to bottom.

Parameter
ordered	boolean Sort the list if true.

Returns

non-null Array of non-null Block Flattened array of blocks.

getField

getField(name) returns Blockly.Field

Returns the named field from a block.

Parameter
name	string The name of the field.

Returns

nullable Blockly.Field Named field, or null if field does not exist.

getFieldValue

getFieldValue(name) returns any type

Returns the language-neutral value of the given field.

Parameter
name	string The name of the field.

Returns

any type Value of the field or null if field does not exist.

getFirstStatementConnection

package

getFirstStatementConnection() returns Blockly.Connection

Return the connection on the first statement input on this block, or null if there are none.

Returns

nullable Blockly.Connection The first statement connection or null.

getHue

getHue() returns number

Get the HSV hue value of a block. Null if hue not set.

Returns

nullable number Hue value (0-360).

getInheritedDisabled

getInheritedDisabled() returns boolean

Get whether the block is disabled or not due to parents. The block's own disabled property is not considered.

Returns

boolean True if disabled.

getInput

getInput(name) returns Blockly.Input

Fetches the named input object.

Parameter
name	string The name of the input.

Returns

nullable Blockly.Input The input object, or null if input does not exist.

getInputsInline

getInputsInline() returns boolean

Get whether value inputs are arranged horizontally or vertically.

Returns

boolean True if inputs are horizontal.

getInputTargetBlock

getInputTargetBlock(name) returns Blockly.Block

Fetches the block attached to the named input.

Parameter
name	string The name of the input.

Returns

nullable Blockly.Block The attached value block, or null if the input is either disconnected or if the input does not exist.

getInputWithBlock

getInputWithBlock(block) returns Blockly.Input

Return the input that connects to the specified block.

Parameter
block	Blockly.Block A block connected to an input on this block. Value must not be null.

Returns

nullable Blockly.Input The input (if any) that connects to the specified block.

getMatchingConnection

package

getMatchingConnection(otherBlock, conn) returns Blockly.Connection

Find the connection on this block that corresponds to the given connection on the other block. Used to match connections between a block and its insertion marker.

Parameter
otherBlock	Blockly.Block The other block to match against. Value must not be null.
conn	Blockly.Connection The other connection to match. Value must not be null.

Returns

nullable Blockly.Connection The matching connection on this block, or null.

getNextBlock

getNextBlock() returns Blockly.Block

Return the next statement block directly connected to this block.

Returns

nullable Blockly.Block The next statement block or null.

getOutputShape

getOutputShape() returns number

Get the block's output shape.

Returns

nullable number Value representing output shape if one exists.

getParent

getParent() returns Blockly.Block

Return the parent block or null if this block is at the top level. The parent block is either the block connected to the previous connection (for a statement block) or the block connected to the output connection (for a value block).

Returns

nullable Blockly.Block The block (if any) that holds the current block.

getPreviousBlock

getPreviousBlock() returns Blockly.Block

Returns the block connected to the previous connection.

Returns

nullable Blockly.Block The previous statement block or null.

getRelativeToSurfaceXY

getRelativeToSurfaceXY() returns Blockly.utils.Coordinate

Return the coordinates of the top-left corner of this block relative to the drawing surface's origin (0,0), in workspace units.

Returns

non-null Blockly.utils.Coordinate Object with .x and .y properties.

getRootBlock

getRootBlock() returns Blockly.Block

Return the top-most block in this block's tree. This will return itself if this block is at the top level.

Returns

non-null Blockly.Block The root block.

getStyleName

getStyleName() returns string

Get the name of the block style.

Returns

string Name of the block style.

getSurroundParent

getSurroundParent() returns Blockly.Block

Return the parent block that surrounds the current block, or null if this block has no surrounding block. A parent block might just be the previous statement, whereas the surrounding block is an if statement, while loop, etc.

Returns

nullable Blockly.Block The block (if any) that surrounds the current block.

getTooltip

getTooltip() returns string

Returns the tooltip text for this block.

Returns

non-null string The tooltip text for this block.

getTopStackBlock

package

getTopStackBlock() returns Blockly.Block

Walk up from the given block up through the stack of blocks to find the top block of the sub stack. If we are nested in a statement input only find the top-most nested block. Do not go all the way to the root block.

Returns

non-null Blockly.Block The top block in a stack.

getVarModels

package

getVarModels() returns Array of non-null Blockly.VariableModel

Return all variables referenced by this block.

Returns

non-null Array of non-null Blockly.VariableModel List of variable models.

getVars

getVars() returns Array of string

Return all variables referenced by this block.

Returns

non-null Array of string List of variable ids.

initModel

public

initModel()

Call initModel on all fields on the block. May be called more than once. Either initModel or initSvg must be called after creating a block and before the first interaction with it. Interactions include UI actions (e.g. clicking and dragging) and firing events (e.g. create, delete, and change).

isCollapsed

isCollapsed() returns boolean

Get whether the block is collapsed or not.

Returns

boolean True if collapsed.

isDeletable

isDeletable() returns boolean

Get whether this block is deletable or not.

Implements

Blockly.IDeletable#isDeletable

Returns

boolean True if deletable.

isDisposed

isDisposed() returns boolean

Returns if this block has been disposed of / deleted.

Returns

boolean True if this block has been disposed of / deleted.

isDuplicatable

isDuplicatable() returns boolean

Get whether is block is duplicatable or not. If duplicating this block and descendants will put this block over the workspace's capacity this block is not duplicatable. If duplicating this block and descendants will put any type over their maxInstances this block is not duplicatable.

Returns

boolean True if duplicatable.

isEditable

isEditable() returns boolean

Get whether this block is editable or not.

Returns

boolean True if editable.

isEnabled

isEnabled() returns boolean

Get whether this block is enabled or not.

Returns

boolean True if enabled.

isInsertionMarker

isInsertionMarker() returns boolean

Get whether this block is an insertion marker block or not.

Returns

boolean True if an insertion marker.

isMovable

isMovable() returns boolean

Get whether this block is movable or not.

Returns

boolean True if movable.

isShadow

isShadow() returns boolean

Get whether this block is a shadow block or not.

Returns

boolean True if a shadow.

jsonInit

jsonInit(json)

Initialize this block using a cross-platform, internationalization-friendly JSON description.

Parameter
json	Object Structured data describing the block. Value must not be null.

lastConnectionInStack

package

lastConnectionInStack(ignoreShadows) returns Blockly.Connection

Walks down a stack of blocks and finds the last next connection on the stack.

Parameter
ignoreShadows	boolean If true,the last connection on a non-shadow block will be returned. If false, this will follow shadows to find the last connection.

Returns

nullable Blockly.Connection The last next connection on the stack, or null.

makeConnection_

protected

makeConnection_(type) returns Blockly.Connection

Create a connection of the specified type.

Parameter
type	number The type of the connection to create.

Returns

non-null Blockly.Connection A new connection of the specified type.

mixin

mixin(mixinObj, opt_disableCheck)

Add key/values from mixinObj to this block object. By default, this method will check that the keys in mixinObj will not overwrite existing values in the block, including prototype values. This provides some insurance against mixin / extension incompatibilities with future block features. This check can be disabled by passing true as the second argument.

Parameter
mixinObj	Object The key/values pairs to add to this block object. Value must not be null.
opt_disableCheck	Optional boolean Option flag to disable overwrite checks.

moveBy

moveBy(dx, dy)

Move a block by a relative offset.

Parameter
dx	number Horizontal offset, in workspace units.
dy	number Vertical offset, in workspace units.

moveInputBefore

moveInputBefore(name, refName)

Move a named input to a different location on this block.

Parameter
name	string The name of the input to move.
refName	string Name of input that should be after the moved input, or null to be the input at the end. Value may be null.

moveNumberedInputBefore

moveNumberedInputBefore(inputIndex, refIndex)

Move a numbered input to a different location on this block.

Parameter
inputIndex	number Index of the input to move.
refIndex	number Index of input that should be after the moved input.

removeInput

removeInput(name, opt_quiet) returns boolean

Remove an input from this block.

Parameter
name	string The name of the input.
opt_quiet	Optional boolean True to prevent an error if input is not present.

Throws

Error if the input is not present and opt_quiet is not true.

Returns

boolean True if operation succeeds, false if input is not present and opt_quiet is true.

renameVarById

renameVarById(oldId, newId)

Notification that a variable is renaming. If the ID matches one of this block's variables, rename it.

Parameter
oldId	string ID of variable to rename.
newId	string ID of new variable. May be the same as oldId, but with an updated name.

setCollapsed

setCollapsed(collapsed)

Set whether the block is collapsed or not.

Parameter
collapsed	boolean True if collapsed.

setColour

setColour(colour)

Change the colour of a block.

Parameter
colour	(number or string) HSV hue value (0 to 360), #RRGGBB string, or a message reference string pointing to one of those two values.

setCommentText

setCommentText(text)

Set this block's comment text.

Parameter
text	string The text, or null to delete. Value may be null.

setDeletable

setDeletable(deletable)

Set whether this block is deletable or not.

Parameter
deletable	boolean True if deletable.

setEditable

setEditable(editable)

Set whether this block is editable or not.

Parameter
editable	boolean True if editable.

setEnabled

setEnabled(enabled)

Set whether the block is enabled or not.

Parameter
enabled	boolean True if enabled.

setFieldValue

setFieldValue(newValue, name)

Sets the value of the given field for this block.

Parameter
newValue	any type The value to set.
name	string The name of the field to set the value of.

setHelpUrl

setHelpUrl(url)

Set the URL of this block's help page.

Parameter
url	(string or function()) URL string for block help, or function that returns a URL. Null for no help.

setInputsInline

setInputsInline(newBoolean)

Set whether value inputs are arranged horizontally or vertically.

Parameter
newBoolean	boolean True if inputs are horizontal.

setInsertionMarker

package

setInsertionMarker(insertionMarker)

Set whether this block is an insertion marker block or not. Once set this cannot be unset.

Parameter
insertionMarker	boolean True if an insertion marker.

setMovable

setMovable(movable)

Set whether this block is movable or not.

Parameter
movable	boolean True if movable.

setMutator

setMutator(_mutator)

Give this block a mutator dialog.

Parameter
_mutator	Blockly.Mutator A mutator dialog instance or null to remove.

setNextStatement

setNextStatement(newBoolean, opt_check)

Set whether another block can chain onto the bottom of this block.

Parameter
newBoolean	boolean True if there can be a next statement.
opt_check	Optional (string, Array of string, or null) Statement type or list of statement types. Null/undefined if any type could be connected.

setOnChange

setOnChange(onchangeFn)

Sets a callback function to use whenever the block's parent workspace changes, replacing any prior onchange handler. This is usually only called from the constructor, the block type initializer function, or an extension initializer function.

Parameter
onchangeFn	function(Blockly.Events.Abstract) The callback to call when the block's workspace changes.

Throws

Error if onchangeFn is not falsey and not a function.

setOutput

setOutput(newBoolean, opt_check)

Set whether this block returns a value.

Parameter
newBoolean	boolean True if there is an output.
opt_check	Optional (string, Array of string, or null) Returned type or list of returned types. Null or undefined if any type could be returned (e.g. variable get).

setOutputShape

setOutputShape(outputShape)

Set the block's output shape.

Parameter
outputShape	number Value representing an output shape. Value may be null.

setParent

package

setParent(newParent)

Set parent of this block to be a new block or null.

Parameter
newParent	Blockly.Block New parent block.

setPreviousStatement

setPreviousStatement(newBoolean, opt_check)

Set whether this block can chain onto the bottom of another block.

Parameter
newBoolean	boolean True if there can be a previous statement.
opt_check	Optional (string, Array of string, or null) Statement type or list of statement types. Null/undefined if any type could be connected.

setShadow

package

setShadow(shadow)

Set whether this block is a shadow block or not.

Parameter
shadow	boolean True if a shadow.

setStyle

setStyle(blockStyleName)

Set the style and colour values of a block.

Parameter
blockStyleName	string Name of the block style.

setTooltip

setTooltip(newTip)

Sets the tooltip for this block.

Parameter
newTip	Tooltip.TipInfo The text for the tooltip, a function that returns the text for the tooltip, or a parent object whose tooltip will be used. To not display a tooltip pass the empty string. Value must not be null.

setWarningText

setWarningText(_text, _opt_id)

Set this block's warning text.

Parameter
_text	string The text, or null to delete. Value may be null.
_opt_id	Optional string An optional ID for the warning text to be able to maintain multiple warnings.

toDevString

toDevString() returns string

This method returns a string describing this Block in developer terms (type name and ID; English only).

Intended to on be used in console logs and errors. If you need a string that uses the user's native language (including block text, field values, and child blocks), use toString().

Returns

string The description.

toString

toString(opt_maxLength, opt_emptyToken) returns string

Create a human-readable text representation of this block and any children.

Parameter
opt_maxLength	Optional number Truncate the string to this length.
opt_emptyToken	Optional string The placeholder string used to denote an empty field. If not specified, '?' is used.

Returns

string Text of block.

unplug

unplug(opt_healStack)

Unplug this block from its superior block. If this block is a statement, optionally reconnect the block underneath with the block on top.

Parameter
opt_healStack	Optional boolean Disconnect child statement and reconnect stack. Defaults to false.

updateVarName

package

updateVarName(variable)

Notification that a variable is renaming but keeping the same ID. If the variable is in use on this block, rerender to show the new name.

Parameter
variable	Blockly.VariableModel The variable being renamed. Value must not be null.

Abstract type

CommentModel

static

{text: nullable string, pinned:boolean, size:Size}