RenderTextArea class

RenderBox behind TextArea. Paints the visible window of _lines and drives cursor visibility. Scroll offsets are computed by the State before each rebuild. The render object passively publishes completed layout dimensions but never schedules State work.

Horizontal scroll is in TERMINAL CELLS (so wide CJK glyphs contribute 2 cells), vertical scroll is in lines.

Inheritance

Constructors

RenderTextArea({required CursorController cursorController, required List<String> lines, required int cursorLine, required int cursorColumn, required String? placeholder, required int heightLines, required int? explicitWidth, required Color color, required Color? backgroundColor, required Color cursorColor, required CursorStyle cursorStyle, required bool focused, required int scrollLine, required int scrollCell})
Snapshots lines, validates extents, and borrows the cursor controller.

Properties

backgroundColor ← Color?
no getter
children → List<RenderObject>
Live read-only view of direct children in traversal order.
latefinalinherited
color ← Color
no getter
cursorAffinity ← TextAffinity
no getter
cursorColor ← Color
no getter
cursorColumn ← int
no getter
cursorLine ← int
no getter
cursorStyle ← CursorStyle
no getter
debugNeedsLayout → bool
Whether this render object is waiting for layout.
no setterinherited
debugNeedsPaint → bool
Whether this render object is waiting for paint.
no setterinherited
explicitWidth ← int?
no getter
focused ← bool
no getter
hashCode → int
The hash code for this object.
no setterinherited
height ↔ int
Height in terminal cells, assigned during layout.
getter/setter pairinherited
heightLines ← int
no getter
lines ← List<String>
no getter
parent → RenderObject?
Parent RenderObject in the tree.
no setterinherited
placeholder ← String?
no getter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scrollCell ← int
no getter
scrollLine ← int
no getter
size ↔ Size
The current size of this box, or Size.zero if not laid out
getter/setter pairinherited
width ↔ int
Width in terminal cells, assigned during layout.
getter/setter pairinherited
x ↔ int
Horizontal position in terminal cells, relative to the parent.
getter/setter pairinherited
y ↔ int
Vertical position in terminal cells, relative to the parent.
getter/setter pairinherited

Methods

adoptChild(RenderObject child) → void
Add a child to this render object
inherited
detach() → void
Called when the render object is detached from the render tree.
override
dropChild(RenderObject child) → void
Remove a child from this render object
inherited
hitTest(HitTestResult result, Offset position) → bool
Hit-test this render object using position in local coordinates.
inherited
hitTestChildren(HitTestResult result, Offset position) → bool
Hit-test children in reverse paint order.
inherited
hitTestSelf(Offset position) → bool
Whether this box should add itself to a hit-test path.
inherited
layout(Constraints constraints) → void
Entry point for layout.
inherited
markNeedsLayout() → void
Mark this render object as needing layout and paint.
inherited
markNeedsPaint() → void
Mark this render object as needing paint.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
paint(PaintingContext context, Offset offset) → void
Default paint implementation.
override
performBoxLayout(BoxConstraints constraints) → void
Perform layout with typed box constraints
override
performLayout(Constraints constraints) → void
Perform layout with box constraints
inherited
positionChild(RenderBox child, int x, int y) → void
Position a child within this box
inherited
toString() → String
A string representation of this object.
inherited
visitChildren(void visitor(RenderObject child)) → void
Visit all children with a callback
inherited

Operators

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