MinimapPainter<T> class

Custom painter for rendering the minimap visualization.

Paints a scaled-down representation of the entire graph, showing:

  • All nodes as simplified rectangles
  • Current viewport as a highlighted region

The painter automatically scales and centers the graph to fit within the minimap bounds while maintaining aspect ratio.

Inheritance

Constructors

MinimapPainter({required NodeFlowController<T> controller, required Color nodeColor, required Color viewportColor, required double borderRadius, bool showViewport = true})
const

Properties

borderRadius → double
Border radius for the viewport indicator rectangle.
final
controller → NodeFlowController<T>
The controller providing access to graph data.
final
hashCode → int
The hash code for this object.
no setterinherited
nodeColor → Color
Color to use when drawing node rectangles.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
semanticsBuilder → SemanticsBuilderCallback?
Returns a function that builds semantic information for the picture drawn by this painter.
no setterinherited
showViewport → bool
Whether to render the viewport indicator.
final
viewportColor → Color
Color to use when drawing the viewport indicator.
final

Methods

addListener(VoidCallback listener) → void
Register a closure to be notified when it is time to repaint.
inherited
hitTest(Offset position) → bool?
Called whenever a hit test is being performed on an object that is using this custom paint delegate.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
paint(Canvas canvas, Size size) → void
Called whenever the object needs to paint. The given Canvas has its coordinate space configured such that the origin is at the top left of the box. The area of the box is the size of the size argument.
override
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that the object notifies when it is time to repaint.
inherited
shouldRebuildSemantics(covariant CustomPainter oldDelegate) → bool
Called whenever a new instance of the custom painter delegate class is provided to the RenderCustomPaint object, or any time that a new CustomPaint object is created with a new instance of the custom painter delegate class (which amounts to the same thing, because the latter is implemented in terms of the former).
inherited
shouldRepaint(covariant MinimapPainter<T> oldDelegate) → bool
Called whenever a new instance of the custom painter delegate class is provided to the RenderCustomPaint object, or any time that a new CustomPaint object is created with a new instance of the custom painter delegate class (which amounts to the same thing, because the latter is implemented in terms of the former).
override
toString() → String
A string representation of this object.
inherited

Operators

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