TargetLineDecoration class

Target line decoration will draw target line horizontally across the chart height of the line is defined by target

colorOverTarget color will be applied to items that missed the target.

In order to change the color of item when it didn't meet the target criteria, you will need to add getTargetItemColor to ItemOptions.colorForValue

Inheritance
Annotations
  • @Deprecated('You can make this decoration and much more using WidgetDecoration. Check migration guide for more info')

Constructors

TargetLineDecoration({required double? target, List<double>? dashArray, Color? colorOverTarget = Colors.red, Color? targetLineColor = Colors.red, double lineWidth = 2.0, bool isTargetInclusive = true})
Constructor for target line decoration

Properties

colorOverTarget → Color?
Color item should take once target is missed
final
dashArray → List<double>?
Dash pattern for the line, if left empty line will be solid
final
hashCode → int
The hash code for this object.
no setterinherited
isTargetInclusive → bool
In case you want to change how value acts when it's exactly on the target value.
final
lineWidth → double
Width of the target line
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
target → double?
Target value for the line
final
targetLineColor → Color?
Color for target line, this will modify TargetLineDecoration and TargetAreaDecoration
final

Methods

animateTo(DecorationPainter endValue, double t) → TargetLineDecoration
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
getTargetItemColor(Color defaultColor, ChartItem item) → Color
Return ColorForValue set up to pair with this decoration
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
inherited
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