SparkLineDecoration class
Sparkline (Line graph) is considered to be just a decoration. You need to use BarGeometryPainter or BubbleGeometryPainter in combination. They can be transparent or be used to show values of the graph
- Inheritance
-
- Object
- DecorationPainter
- SparkLineDecoration
Constructors
Properties
-
dashArray
→ List<
double> ? -
Dashed array for showing lines, if this is not set the line is solid
final
- fill → bool
-
Is line or fill, line will have lineWidth, setting
fill to true will ignore lineWidth
final
- gradient → Gradient?
-
Gradient color to take.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- id → String?
-
If od sparkline, with different ID's you can have more SparkLineDecoration
on same data with different settings. (ex. One to fill and another for just line)
final
- lineColor → Color
-
Set sparkline color
final
- lineWidth → double
-
Set sparkline width
final
- listIndex → int
-
Index of list in items, this is used if there are multiple lists in the chart
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- smoothPoints → bool
-
Is sparkline curve smooth (bezier) or lines
no setter
- startPosition → double
-
Set sparkline start position.
This value ranges from 0.0 - 1.0.
final
Methods
-
animateTo(
DecorationPainter endValue, double t) → DecorationPainter -
Animate to next decoration state, each decoration should implement this.
This is just regular lerp function, but instead of static function where you pass start and
end state, here we start with current state and animate to
endValue
.override -
applyPaintTransform(
ChartState state, Size size) → Offset -
override
-
draw(
Canvas canvas, Size size, ChartState state) → void -
Draw decoration.
Decoration can be foreground or background decoration that will be drawn on the chart
decorations can ignore padding and can use whole available canvas to draw.
override
-
getRenderer(
ChartState state) → Widget -
inherited
-
initDecoration(
ChartState state) → void -
Init decoration is first thing called on decorations, it will pass current ChartState
so decoration can easily calculate needed stuff for their layout.
inherited
-
isSameType(
DecorationPainter other) → bool -
Used for animating, we just need to find matching type, don't actually check for equality since we want to animate
from one state to other. Some decorations may consider overriding this in case multiples are used
override
-
layoutSize(
BoxConstraints constraints, ChartState state) → Size -
override
-
marginNeeded(
) → EdgeInsets -
Get extra margin (not definable by the user). This makes sure that any decoration
that leaves original drawing window is not drawing outside of that window (This is not
enforced right now but it's unwanted behaviour)
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
paddingNeeded(
) → EdgeInsets -
Get extra padding (not definable by user, calculated by decoration if needed). This makes sure
that decoration will fit with the chart in wanted area.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited