Flutter 如何向 fl_chart 添加裁剪器 (CustomPainter)
Flutter how to add a clipper to fl_chart (CustomPainter)
我有一个 fl_chart
(pub),它显示在下面的 gif 中。转换数据时,画家会在图表边界之外绘画。我怎样才能在下面的图表中添加 clipper
(或其他一些修复),这样这个错误就不会发生?底部有一些代码和一些图像。 fl_chart
使用 CustomPainter
绘制图表,所以也许我可以覆盖源代码中的某些内容?
我的快速修复(我删除了过渡动画,但我想使用动画):
忽略y轴(左边)的label bug
(如果您没有看到错误,请仔细查看右侧)
我想使用这样的过渡,但图表不会超出边界:
代码如下:
LineChartData mainData() {
return LineChartData(
lineTouchData: LineTouchData(
touchTooltipData: LineTouchTooltipData(
fitInsideHorizontally: true,
tooltipBgColor: Colors.white,
getTooltipItems: (List<LineBarSpot> touchedBarSpots) {
return touchedBarSpots.map((barSpot) {
return LineTooltipItem(
'${barSpot.y.toInt()}',
TextStyle(
fontFamily: 'Jost*',
fontSize: 15,
color: Colors.black,
),
);
}).toList();
}
),
getTouchedSpotIndicator: (LineChartBarData barData, List<int> spotIndexes) {
return spotIndexes.map((spotIndex) {
return TouchedSpotIndicatorData(
FlLine(
color: const Color.fromARGB(255, 77, 77, 77),
strokeWidth: 1,
dashArray: [4,4],
),
FlDotData(
getDotPainter: (spot, percent, barData, index) {
return FlDotCirclePainter(
radius: 5.5,
color: gradientColors[0],
strokeWidth: 2,
strokeColor: Colors.white,
);
},
),
);
}).toList();
}
),
gridData: FlGridData(
show: true,
getDrawingHorizontalLine: (value) {
return FlLine(
color: const Color.fromARGB(255, 98, 95, 161),
strokeWidth: 1,
dashArray: [4,4]
);
},
),
titlesData: FlTitlesData(
show: true,
bottomTitles: SideTitles(
showTitles: true,
reservedSize: 14,
textStyle:
const TextStyle(
color: Color.fromARGB(255, 181, 181, 181),
fontWeight: FontWeight.w300,
fontFamily: 'Jost*',
fontSize: 13,
),
getTitles: (value) {
return _labels[widget.timeType][value.toInt()] ?? '';
},
),
leftTitles: SideTitles(
showTitles: true,
textStyle: const TextStyle(
color: Color.fromARGB(255, 181, 181, 181),
fontWeight: FontWeight.w300,
fontFamily: 'Jost*',
fontSize: 16,
),
getTitles: (value) {
return (value.toInt()).toString();
},
reservedSize: 28,
margin: 12,
),
),
borderData:
FlBorderData(
show: true,
border: Border.symmetric(
horizontal: BorderSide(
color: const Color.fromARGB(255, 170, 170, 170),
width: 1.2
),
),
),
minX: 0,
maxX: _data[widget.timeType].length.toDouble()-1, //length of data set
minY: _data[widget.timeType].reduce(min).toDouble() - 1, //set to lowest v
maxY: _data[widget.timeType].reduce(max).toDouble() + 1, //set to highest v
lineBarsData: [
LineChartBarData(
spots: [
for (int i = 0; i < _data[widget.timeType].length; i++)
FlSpot(i.toDouble(), _data[widget.timeType][i].toDouble())
],
//FlSpot(2.6, 4),
isCurved: true,
colors: [
gradientColors[0],
],
barWidth: 2,
isStrokeCapRound: true,
dotData: FlDotData(
show: false,
),
belowBarData: BarAreaData(
show: true,
colors: gradientColors,
gradientColorStops: [0, 0.5, 1.0],
gradientFrom: const Offset(0, 0),
gradientTo: const Offset(0, 1),
),
),
],
);
}
中有一个clipData
属性
尝试将其设置为FlClipData.all()
。
我有一个 fl_chart
(pub),它显示在下面的 gif 中。转换数据时,画家会在图表边界之外绘画。我怎样才能在下面的图表中添加 clipper
(或其他一些修复),这样这个错误就不会发生?底部有一些代码和一些图像。 fl_chart
使用 CustomPainter
绘制图表,所以也许我可以覆盖源代码中的某些内容?
我的快速修复(我删除了过渡动画,但我想使用动画):
忽略y轴(左边)的label bug
(如果您没有看到错误,请仔细查看右侧)
我想使用这样的过渡,但图表不会超出边界:
代码如下:
LineChartData mainData() {
return LineChartData(
lineTouchData: LineTouchData(
touchTooltipData: LineTouchTooltipData(
fitInsideHorizontally: true,
tooltipBgColor: Colors.white,
getTooltipItems: (List<LineBarSpot> touchedBarSpots) {
return touchedBarSpots.map((barSpot) {
return LineTooltipItem(
'${barSpot.y.toInt()}',
TextStyle(
fontFamily: 'Jost*',
fontSize: 15,
color: Colors.black,
),
);
}).toList();
}
),
getTouchedSpotIndicator: (LineChartBarData barData, List<int> spotIndexes) {
return spotIndexes.map((spotIndex) {
return TouchedSpotIndicatorData(
FlLine(
color: const Color.fromARGB(255, 77, 77, 77),
strokeWidth: 1,
dashArray: [4,4],
),
FlDotData(
getDotPainter: (spot, percent, barData, index) {
return FlDotCirclePainter(
radius: 5.5,
color: gradientColors[0],
strokeWidth: 2,
strokeColor: Colors.white,
);
},
),
);
}).toList();
}
),
gridData: FlGridData(
show: true,
getDrawingHorizontalLine: (value) {
return FlLine(
color: const Color.fromARGB(255, 98, 95, 161),
strokeWidth: 1,
dashArray: [4,4]
);
},
),
titlesData: FlTitlesData(
show: true,
bottomTitles: SideTitles(
showTitles: true,
reservedSize: 14,
textStyle:
const TextStyle(
color: Color.fromARGB(255, 181, 181, 181),
fontWeight: FontWeight.w300,
fontFamily: 'Jost*',
fontSize: 13,
),
getTitles: (value) {
return _labels[widget.timeType][value.toInt()] ?? '';
},
),
leftTitles: SideTitles(
showTitles: true,
textStyle: const TextStyle(
color: Color.fromARGB(255, 181, 181, 181),
fontWeight: FontWeight.w300,
fontFamily: 'Jost*',
fontSize: 16,
),
getTitles: (value) {
return (value.toInt()).toString();
},
reservedSize: 28,
margin: 12,
),
),
borderData:
FlBorderData(
show: true,
border: Border.symmetric(
horizontal: BorderSide(
color: const Color.fromARGB(255, 170, 170, 170),
width: 1.2
),
),
),
minX: 0,
maxX: _data[widget.timeType].length.toDouble()-1, //length of data set
minY: _data[widget.timeType].reduce(min).toDouble() - 1, //set to lowest v
maxY: _data[widget.timeType].reduce(max).toDouble() + 1, //set to highest v
lineBarsData: [
LineChartBarData(
spots: [
for (int i = 0; i < _data[widget.timeType].length; i++)
FlSpot(i.toDouble(), _data[widget.timeType][i].toDouble())
],
//FlSpot(2.6, 4),
isCurved: true,
colors: [
gradientColors[0],
],
barWidth: 2,
isStrokeCapRound: true,
dotData: FlDotData(
show: false,
),
belowBarData: BarAreaData(
show: true,
colors: gradientColors,
gradientColorStops: [0, 0.5, 1.0],
gradientFrom: const Offset(0, 0),
gradientTo: const Offset(0, 1),
),
),
],
);
}
clipData
属性
尝试将其设置为FlClipData.all()
。