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customize axis properties and graph color

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This commit is contained in:
TAJAOUART Mounir 2023-02-09 22:19:43 +01:00
parent 993603a02b
commit ba4723433b
1 changed files with 47 additions and 36 deletions
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83
lib/src/live_chart.dart
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@ -12,12 +12,18 @@ class RealTimeGraph extends StatefulWidget {
this.updateDelay = const Duration(milliseconds: 50),
this.speed = 1,
this.graphStroke = 0.5,
this.graphColor = Colors.red,
this.axisColor = Colors.green,
this.axisWidth = 1.0,
required this.stream,
this.pointsSpacing = 3.0,
this.displayMode = ChartDisplay.line,
}) : super(key: key);
final Stream<double> stream;
final Color graphColor;
final double axisWidth;
final Color axisColor;
final Duration updateDelay;
final int speed;
final double graphStroke;
@ -63,59 +69,60 @@ class RealTimeGraphState extends State<RealTimeGraph>
@override
Widget build(BuildContext context) {
return ClipRRect(
child: RepaintBoundary(
child: LayoutBuilder(
builder: (context, constraints) {
if (!constraints.maxWidth.isFinite ||
!constraints.maxHeight.isFinite) {
return const SizedBox.shrink();
}
return LayoutBuilder(
builder: (context, constraints) {
if (!constraints.maxWidth.isFinite || !constraints.maxHeight.isFinite) {
return const SizedBox.shrink();
}
return SizedBox(
key: Key('${constraints.maxWidth}${constraints.maxHeight}'),
height: constraints.maxHeight,
width: constraints.maxWidth,
child: Row(
return SizedBox(
key: Key('${constraints.maxWidth}${constraints.maxHeight}'),
height: constraints.maxHeight,
width: constraints.maxWidth,
child: Row(
mainAxisSize: MainAxisSize.max,
children: [
Container(
color: widget.axisColor,
width: widget.axisWidth,
height: constraints.maxHeight,
),
Column(
mainAxisSize: MainAxisSize.max,
children: [
Container(
color: Colors.grey,
width: 1,
height: constraints.maxHeight,
),
Column(
mainAxisSize: MainAxisSize.max,
children: [
CustomPaint(
ClipRRect(
child: RepaintBoundary(
child: CustomPaint(
size: Size(
constraints.maxWidth - 1,
constraints.maxHeight - 1,
constraints.maxWidth - widget.axisWidth,
constraints.maxHeight - widget.axisWidth,
),
painter: widget.displayMode == ChartDisplay.points
? _PointGraphPainter(
data: _data,
pointsSpacing: widget.pointsSpacing,
graphStroke: widget.graphStroke,
color: widget.graphColor,
)
: _LineGraphPainter(
data: _data,
graphStroke: widget.graphStroke,
color: widget.graphColor,
),
),
Container(
color: Colors.grey,
height: 1,
width: constraints.maxWidth - 1,
)
],
),
),
Container(
color: widget.axisColor,
height: widget.axisWidth,
width: constraints.maxWidth - widget.axisWidth,
)
],
),
);
},
),
),
],
),
);
},
);
}
@ -138,18 +145,20 @@ class _PointGraphPainter extends CustomPainter {
required this.data,
required this.pointsSpacing,
required this.graphStroke,
required this.color,
});
final List<Point<double>> data;
final double pointsSpacing;
final double graphStroke;
final Color color;
@override
void paint(Canvas canvas, Size size) {
final paint = Paint()
..style = PaintingStyle.fill
..strokeWidth = graphStroke
..color = Colors.white;
..color = color;
// Find the maximum y value in the data
double maxY = 0;
@ -206,17 +215,19 @@ class _LineGraphPainter extends CustomPainter {
_LineGraphPainter({
required this.data,
required this.graphStroke,
required this.color,
});
final List<Point<double>> data;
final double graphStroke;
final Color color;
@override
void paint(Canvas canvas, Size size) {
final paint = Paint()
..style = PaintingStyle.stroke
..strokeWidth = graphStroke
..color = Colors.white;
..color = color;
Path path = Path();
// Find the maximum y value in the data
double maxY = 0;