CustomViewport class

A custom two-dimensional viewport for the code editor.

This viewport is used internally by CodeForge to enable both vertical and horizontal scrolling within the editor. It delegates to a Render2DCodeField for layout and painting.

Inheritance

Constructors

CustomViewport({Key? key, required ViewportOffset verticalOffset, required AxisDirection verticalAxisDirection, required ViewportOffset horizontalOffset, required AxisDirection horizontalAxisDirection, required TwoDimensionalChildBuilderDelegate delegate, required Axis mainAxis})
Creates a CustomViewport with the required scroll offsets and axes.
const

Properties

cacheExtent → double?
The viewport has an area before and after the visible area to cache items that are about to become visible when the user scrolls.
finalinherited
clipBehavior → Clip
The content will be clipped (or not) according to this option.
finalinherited
delegate → TwoDimensionalChildDelegate
A delegate that provides the children for the TwoDimensionalViewport.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
horizontalAxisDirection → AxisDirection
The direction in which the horizontalOffset's ViewportOffset.pixels increases.
finalinherited
horizontalOffset → ViewportOffset
Which part of the content inside the viewport should be visible in the horizontal axis.
finalinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
mainAxis → Axis
The main axis of the two.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
verticalAxisDirection → AxisDirection
The direction in which the verticalOffset's ViewportOffset.pixels increases.
finalinherited
verticalOffset → ViewportOffset
Which part of the content inside the viewport should be visible in the vertical axis.
finalinherited

Methods

createElement() → RenderObjectElement
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
createRenderObject(BuildContext context) → RenderTwoDimensionalViewport
Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
didUnmountRenderObject(covariant RenderObject renderObject) → void
This method is called when a RenderObject that was previously associated with this widget is removed from the render tree. The provided RenderObject will be of the same type as the one created by this widget's createRenderObject method.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
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
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited
updateRenderObject(BuildContext context, covariant RenderTwoDimensionalViewport renderObject) → void
Copies the configuration described by this RenderObjectWidget to the given RenderObject, which will be of the same type as returned by this object's createRenderObject.
override

Operators

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