ViewportAxisContextState class
A immutable value that is the subject of ViewportAxisContext.
It stores the information about the visible columns or rows in a defined moment given the visible scrollableRange of columns and rows.
The range is the one defined by VirtualizationCalculator and defines the
scrollable part of an axis.
It also stores information about the frozen columns or rows derived from frozenRange.
- Annotations
Constructors
-
ViewportAxisContextState({required Range scrollableRange, required Range frozenRange, required double extent, required double frozenExtent, required List<
double> offsets, required List<double> frozenOffsets, required List<double> sizes, required List<double> frozenSizes, required Iterable<int> visibleIndices, required Iterable<int> visibleFrozenIndices}) -
const
Properties
- extent → double
-
The sum of the sizes of the visible columns or rows in the
scrollableRange.
final
- frozenExtent → double
-
The sum of the sizes of the visible frozen columns or rows in the
frozenRange.
final
-
frozenOffsets
→ List<
double> -
Just like offsets but for the frozenRange
final
- frozenRange → Range
-
The range representing the frozen columns or rows in the axis.
Used to compute other fields in this state that are about the frozen area
of the axis.
final
-
frozenSizes
→ List<
double> -
The size of each visible frozen column or row in the frozenRange
final
- hashCode → int
-
The hash code for this object.
no setteroverride
-
offsets
→ List<
double> -
The offset of each visible column or row in relation to the leading edge
of the visible scrollableRange.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- scrollableRange → Range
-
The range of visible columns or rows that was used to compute the
other fields in this state that are about the scrollable area of the axis.
final
-
sizes
→ List<
double> -
The size of each visible column or row in the scrollableRange
final
-
visibleFrozenIndices
→ Iterable<
int> -
Just like visibleIndices but for the frozenRange
final
-
visibleIndices
→ Iterable<
int> -
The indices of the headers in the scrollableRange that occupies at least
1px.
final
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
override