0.36.0

• BUGFIX Fixed bug of lerping FlSpot.nullSpot, #487.
• BUGFIX Fixed showing tooltip problem when animating chart, #647.
• BUGFIX Fixed RadarChart drawing problem, #627.
• IMPROVEMENT Now SideTitles.interval is working correctly in bottomTitles in the BarChart, #648.
• BREAKING You should provide spotsIndices instead of showingSpots in ShowingTooltipIndicators.

0.35.0

• IMPROVEMENT Added children property in the LineTooltipItem, BarTooltipItem and ScatterTooltipItem which accepts a list of TextSpan. It allows you to have more customized texts inside the tooltip. See BarChartSample1 and ScatterSample2, #72, #294.
• IMPROVEMENT Added getTouchLineStart and getTouchLineEnd in LineTouchData to give more customizability over showing the touch lines. see SampleLineChart9.
• IMPROVEMENT Enabled sectionsSpace in PieChart for the web.
• IMPROVEMENT Added Makefile commands which makes it comfortable for verifying your code before push (It is related to contributors, red more about it in CONTRIBUTING.md).
• IMPROVEMENT Added FlDotCrossPainter which extends FlDotPainter to paint X marks on line chart spots.
• IMPROVEMENT Added textDirection property in LineTooltipItem, BarTooltipItem and ScatterTooltipItem. It allows you to support rtl languages in tooltips.
• IMPROVEMENT Added textDirection property in SideTitles class, #531. It allows you to support rtl languages in side titles.
• IMPROVEMENT Added textDirection property in AxisTitles class. It allows you to support rtl languages in axis titles.
• BUGFIX Fixed some bugs on drawing PieChart (for example when we have only one section), #582,
• BREAKING Border of pieChart now is hide by default (you can show it using borderData: FlBorderData(show: true).
• BREAKING You cannot set 0 value on PieChartSectionData.value anymore, instead remove it from list.
• BREAKING Removed fullHeightTouchLine property from LineTouchData. Now you can have a full line with following snippet:

LineTouchData(
  ...
  getTouchLineStart: (barData, index) => -double.infinity // default: from bottom,
  getTouchLineEnd: (barData, index) => double.infinity //to top,
  ...
)

0.30.0

• [IMPROVEMENT] We now use RenderObject as our default drawing system. It brings a lot of stability. Such as size handling, hitTest handling (touches), and It makes us possible to paint Widgets inside our chart (It might fix #383, #556, #582, #584, #591).
• [IMPROVEMENT] Added Radar Chart Documentations
• [IMPROVEMENT] Added textAlign property in the BarTooltipItem, LineTooltipItem, and ScatterTooltipItem, default is TextAlign.center.
• [IMPROVEMENT] Added direction property in the BarTouchTooltipData, and LineTouchTooltipData to specify the position of the tooltip (can be auto, top, bottom), default is auto.
• [IMPROVEMENT] Updated touch flow, we now use hitTest for handling touch and interactions.
• [IMPROVEMENT] Added 'clickHappened' property in all of our TouchResponses (such as LineTouchResponse, BarTouchResponse, ...), #210.
• [IMPROVEMENT] Added swapAnimationCurve property to all chart widgets which handles the built-in animation Curve, #436.
• [BREAKING] Some properties in ScatterTouchResponse, and PieTouchResponse moved to a wrapper class, you need to access them through that wrapper class.
• [BREAKING] Renamed tooltipBottomMargin to tooltipMargin property in the BarTouchTooltipData, and LineTouchTooltipData
• [Bugfix] Fixed double.infinity in PieChartData .centerSpaceRadius, #584.

0.20.1

• [BREAKING] We now support flutter version 2.0 (null-safety), check out the migration guide.
• [NEW_CHART] We have added RadarChart. Thanks to Payam Zahedi!

0.20.0-nullsafety1

• [BREAKING] We have migrated our project to null-safety. You may need to change your source-code to compile. check migration guide.
• [BREAKING] You cannot set null value on FlSpot anymore (use FlSpot.nullSpot instead).

0.12.3

• [Bugfix] Fixed PieChart exception bug on sections tap, #514.
• [Bugfix] Fixed PieChart badges problem, #538.
• [Bugfix] Fixed Bug of drawing lines with strokeWidth zero, #558.
• [Improvement] Updated example app to support web.
• [Improvement] Show tooltips on mouse hover on Web, and Desktop.

0.12.2

• [Bugfix] Fixed PieChart badges draw in first frame problem, #513.
• [Improvement] Use CanvasWrapper to proxy draw functions (It does not have any effect on the result, it makes the code testable)

0.12.1

• [Bugfix] Fixed PieChart badges bug with re-implementing the solution, #507
• [Bugfix] Fix the setState issue using PieChart in the ListView, #467
• [Bugfix] Fixed formatNumber bug for negative numbers, #486.
• [Improvement] Added applyCutOffY property in BarAreaSpotsLine to inherit cutOffY property of its parent, #478.

0.12.0

• [Improvement] [BREAKING] Replaced color property with colors in BarChartRodData, and BackgroundBarChartRodData to support gradient in BarChart, instead of solid color, #166. Check BarChartSample3
• [Improvement] Improved gradient stops calculating algorithm.
• [Improvement] [BREAKING] Changed SideTitle's textStyle property to getTextStyles getter (it gives you the axis value, and you must return a TextStyle based on it), It helps you to have a different style for specific text, #439. Check it here LineChartSample3
• [Improvement] Added badgeWidget, and badgePositionPercentageOffset in each PieChartSectionData to provide a widget to show in the chart, see this sample, #443. Providing a widget is an important step in our library, if it works perfectly, we will aplly this solution on other parts. Then I appreciate any feedback.
• [Bugfix] Fixed aboveBarArea flickers after setState, #440.

0.11.1

• [Bugfix] Fixed drawing BarChart rods with providing minY (for positive), maxY (for negative) values bug, #404.
• [Bugfix] Fixed example app build fail error, by upgrading flutter_svg package to 0.18.1