90 lines
2.5 KiB
Dart
90 lines
2.5 KiB
Dart
import 'package:flutter/material.dart';
|
|
|
|
class MyRectangularTrackShape extends RectangularSliderTrackShape {
|
|
Rect getPreferredRect({
|
|
@required RenderBox parentBox,
|
|
Offset offset = Offset.zero,
|
|
@required SliderThemeData sliderTheme,
|
|
bool isEnabled = false,
|
|
bool isDiscrete = false,
|
|
}) {
|
|
final double trackHeight = sliderTheme.trackHeight;
|
|
final double trackLeft = offset.dx;
|
|
final double trackTop =
|
|
offset.dy + (parentBox.size.height - trackHeight) / 2;
|
|
final double trackWidth = parentBox.size.width;
|
|
return Rect.fromLTWH(trackLeft - 5, trackTop, trackWidth, trackHeight);
|
|
}
|
|
}
|
|
|
|
class MyRoundSliderThumpShape extends SliderComponentShape {
|
|
const MyRoundSliderThumpShape({
|
|
this.enabledThumbRadius = 10.0,
|
|
this.disabledThumbRadius,
|
|
this.thumbCenterColor,
|
|
});
|
|
final Color thumbCenterColor;
|
|
final double enabledThumbRadius;
|
|
final double disabledThumbRadius;
|
|
double get _disabledThumbRadius => disabledThumbRadius ?? enabledThumbRadius;
|
|
|
|
@override
|
|
Size getPreferredSize(bool isEnabled, bool isDiscrete) {
|
|
return Size.fromRadius(
|
|
isEnabled == true ? enabledThumbRadius : _disabledThumbRadius);
|
|
}
|
|
|
|
@override
|
|
void paint(
|
|
PaintingContext context,
|
|
Offset center, {
|
|
Animation<double> activationAnimation,
|
|
@required Animation<double> enableAnimation,
|
|
bool isDiscrete,
|
|
TextPainter labelPainter,
|
|
RenderBox parentBox,
|
|
@required SliderThemeData sliderTheme,
|
|
TextDirection textDirection,
|
|
double value,
|
|
double textScaleFactor,
|
|
Size sizeWithOverflow,
|
|
}) {
|
|
final Canvas canvas = context.canvas;
|
|
final Tween<double> radiusTween = Tween<double>(
|
|
begin: _disabledThumbRadius,
|
|
end: enabledThumbRadius,
|
|
);
|
|
final ColorTween colorTween = ColorTween(
|
|
begin: sliderTheme.disabledThumbColor,
|
|
end: sliderTheme.thumbColor,
|
|
);
|
|
|
|
canvas.drawCircle(
|
|
center,
|
|
radiusTween.evaluate(enableAnimation),
|
|
Paint()
|
|
..color = thumbCenterColor
|
|
..style = PaintingStyle.fill
|
|
..strokeWidth = 2,
|
|
);
|
|
|
|
canvas.drawRect(
|
|
Rect.fromLTRB(
|
|
center.dx - 10, center.dy + 10, center.dx + 10, center.dy - 10),
|
|
Paint()
|
|
..color = Colors.white
|
|
..style = PaintingStyle.fill
|
|
..strokeWidth = 10,
|
|
);
|
|
|
|
canvas.drawLine(
|
|
Offset(center.dx - 5, center.dy - 2),
|
|
Offset(center.dx + 5, center.dy + 2),
|
|
Paint()
|
|
..color = Colors.transparent
|
|
..style = PaintingStyle.fill
|
|
..strokeWidth = 2,
|
|
);
|
|
}
|
|
}
|