TxImageSpriteBlock class

Inheritance

Constructors

TxImageSpriteBlock({required int msgCode, required TxSprite image, required int spriteLineHeight, bool progressiveRender = true, bool updatable = true})
Represents an image of a specified size sliced into a number of "sprite lines" of the full width of the image, and the specified height, and possibly a final sprite line of a different height. When sending TxImageSpriteBlock to Frame, the sendMessage() will send the header with block dimensions and sprite line height, and the user then sends each line[] as a TxSprite message with the same msgCode as the Block, and the frame app will use the line height to place each line. By sending each line separately we can display them as they arrive, as well as reducing overall memory requirement (each concat() call is smaller). Sending an ImageSpriteBlock with no lines is not intended usage.

Properties

hashCode → int
The hash code for this object.
no setterinherited
height → int
no setter
isEmpty → bool
After construction, an ImageSpriteBlock should be tested that it has a non-zero number of sprite lines to send, otherwise it should not be sent
no setter
isNotEmpty → bool
After construction, an ImageSpriteBlock should be tested that it has a non-zero number of sprite lines to send, otherwise it should not be sent
no setter
msgCode → int
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
spriteLineHeight → int
no setter
spriteLines → List<TxSprite>
no setter
width → int
no setter

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
pack() → Uint8List
Corresponding parser should be called from frame_app data handler
override
toPngBytes() → Future<Uint8List>
Convert TxImageSpriteBlock back to a single image for testing/verification startLine and endLine are inclusive
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited