tsacdop-podcast-app-android/lib/util/custom_slider.dart

89 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 trackHeight = sliderTheme.trackHeight;
final trackLeft = offset.dx;
final trackTop = offset.dy + (parentBox.size.height - trackHeight) / 2;
final 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 = context.canvas;
final 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,
);
}
}