CartesianCanvasState class

Inheritance
Implemented types

Constructors

CartesianCanvasState()

Properties

activeStroke ↔ List<Offset>?
getter/setter pair
activeTooltip ↔ TooltipData?
getter/setter pair
boundaryRepaintKey → GlobalKey<State<StatefulWidget>>
final
context → BuildContext
The location in the tree where this widget builds.
no setterinherited
currentEraserWidth ↔ double
getter/setter pair
currentOrigin ↔ Offset
getter/setter pair
currentScale ↔ double
getter/setter pair
drawingMode → bool
Returns true if the freehand drawing mode is currently active.
no setteroverride
eraserMode → bool
Returns true if the eraser mode is currently active.
no setteroverride
gridVisible → bool
Returns true if the background grid is currently visible.
no setteroverride
hashCode → int
The hash code for this object.
no setterinherited
isDrawingModeActive ↔ bool
getter/setter pair
isEraserModeActive ↔ bool
getter/setter pair
isGridVisible ↔ bool
getter/setter pair
isInitialized ↔ bool
getter/setter pair
mounted → bool
Whether this State object is currently in a tree.
no setterinherited
mousePosition ↔ Offset?
getter/setter pair
previousFocalPoint ↔ Offset?
getter/setter pair
previousScaleGesture ↔ double?
getter/setter pair
recordedStrokes → List<FreehandItem>
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
undoneStrokes → List<FreehandItem>
final
widget → CartesianCanvas
The current configuration.
no setterinherited

Methods

activate() → void
Called when this object is reinserted into the tree after having been removed via deactivate.
inherited
applyZoomAtPoint(Offset focalPoint, double zoomFactor) → void
build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
captureImage() → Future<Image?>
Captures the current visible canvas as an image. Returns a ui.Image which can be used to save or share the graph.
override
clearFreehand() → void
Clears all freehand strokes (including erasures) from the canvas.
override
deactivate() → void
Called when this object is removed from the tree.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
detectTooltipIntersection(Offset screenCoordinates) → void
didChangeDependencies() → void
Called when a dependency of this State object changes.
inherited
didUpdateWidget(covariant CartesianCanvas oldWidget) → void
Called whenever the widget configuration changes.
override
dispose() → void
Called when this object is removed from the tree permanently.
override
fitToContent() → void
Automatically adjusts the view (scale and origin) to fit all items within the viewport.
override
goToPoint(double x, double y) → void
Moves the center of the viewport to the specific x and y world coordinates.
override
initState() → void
Called when this object is inserted into the tree.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
reassemble() → void
Called whenever the application is reassembled during debugging, for example during hot reload.
inherited
redoFreehand() → void
Redoes the previously undone freehand stroke or erasure.
override
renderCanvasLayer(Size availableSize) → Widget
resetView() → void
Resets the canvas view to its initial origin and scale.
override
setDrawingMode(bool isEnabled) → void
Sets the freehand drawing mode to val.
override
setEraserMode(bool isEnabled) → void
Sets the eraser mode to val.
override
setGridVisible(bool isVisible) → void
Sets the visibility of the background grid to val.
override
setState(VoidCallback fn) → void
Notify the framework that the internal state of this object has changed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toggleFullScreen() → void
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringShort() → String
A brief description of this object, usually just the runtimeType and the hashCode.
inherited
transformScreenToWorld(double px, double py) → Offset
transformWorldToScreen(double x, double y) → Offset
undoFreehand() → void
Undoes the last freehand stroke or erasure.
override
zoomFromCenter(double zoomFactor) → void
Zooms the canvas in or out from the center of the viewport by a given factor.
override

Operators

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