Canvas class final

Canvas is a cell-buffer that can be used to compose and draw Drawables.

Implemented types

• Screen
• OwnedCellScreen
• ClearableScreen
• ClearAreaScreen
• FillableScreen
• FillAreaScreen
• Drawable

Constructors

Canvas(int width, int height)

Creates a canvas with width and height in cells.

Properties

buffer → Buffer

The mutable backing buffer.

no setter

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

bounds() → Rectangle

Returns the drawable bounds of the canvas.

override

cellAt(int x, int y) → Cell?

Returns the cell at (x, y) or null if out of bounds.

override

clear() → void

Clears the entire canvas to empty cells.

override

clearArea(Rectangle area) → void

Clears area of the screen to empty cells.

override

compose(Drawable drawer) → Canvas

Composes a Drawable onto this canvas.

dispose() → void

Releases the canvas-owned backing screen buffer.

draw(Screen screen, Rectangle area) → void

Draws this canvas onto another Screen within area.

override

fill(Cell? cell) → void

Fills the entire screen with cell.

override

fillArea(Cell? cell, Rectangle area) → void

Fills area of the screen with cell.

override

height() → int

The current canvas height in cells.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

render() → String

Renders the canvas into a string (trimming trailing spaces per line).

resize(int width, int height) → void

Resizes the canvas backing buffer to the given dimensions.

setCell(int x, int y, Cell? cell) → void

Sets the cell at (x, y) in the backing buffer.

override

setCellOwned(int x, int y, Cell? cell) → void

Sets the cell at (x, y) and may take ownership of cell.

override

toString() → String

A string representation of this object.

inherited

width() → int

The current canvas width in cells.

widthMethod() → WidthMethod

Returns the active grapheme width measurement method.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited