# PieChart

<img src="https://github.com/imaNNeoFighT/fl_chart/raw/master/repo_files/images/pie_chart/pie_chart.jpg" width="300" >

### How to use
```dart
PieChart(
  PieChartData(
    // read about it in the below section
  ),
);
```

### PieChartData
|PropName		|Description	|default value|
|:---------------|:---------------|:-------|
|sections| list of [PieChartSectionData ](#PieChartSectionData) that is shown on the pie chart|[]|
|centerSpaceRadius| free space in the middle of the PieChart, set `double.nan` if you want it to be calculated according to the view size| double.nan|
|centerSpaceColor| colors the free space in the middle of the PieChart|Colors.transparent|
|sectionsSpace| space between the sections (margin of them)|2|
|startDegreeOffset| degree offset of the sections around the pie chart, should be between 0 and 360|0|
|pieTouchData| [PieTouchData](#PieTouchData) holds the touch interactivity details| PieTouchData()|
|borderData| shows a border around the chart, check the [FlBorderData](base_chart.md#FlBorderData)|FlBorderData()|


### PieChartSectionData
|PropName		|Description	|default value|
|:---------------|:---------------|:-------|
|value| value is the weight of each section, for example if all values is 25, and we have 4 section, then the sum is 100 and each section takes 1/4 of the whole circle (360/4) degree|10|
|color| colors the section| Colors.red
|radius| the width radius of each section|40|
|showTitle| determines to show or hide the titles on each section|true|
|titleStyle| TextStyle of the titles| TextStyle(color: Colors.white, fontSize: 16, fontWeight: FontWeight.bold)|
|title| title of the section| "1"|
|titlePositionPercentageOffset|the place of the title in the section, this field should be between 0 and 1|0.5|


### PieTouchData ([read about touch handling](handle_touches.md))
|PropName|Description|default value|
|:-------|:----------|:------------|
|enabled|determines to enable or disable touch behaviors|true|
|touchCallback| listen to this callback to retrieve touch events, it gives you a [PieTouchResponse](#PieTouchResponse)| null|

### PieTouchResponse
|PropName|Description|default value|
|:-------|:----------|:------------|
|sectionData|the [PieChartSectionData](#PieChartSectionData) that user touched| null |
|touchedSectionIndex| index of the touched section | null|
|touchAngle|the angle of the touch|null|
|touchRadius| the radius of the touch|null|
|touchInput|a [FlTouchInput](base_chart.md#FlTouchInput) that is the touch behaviour|null|


### some samples
----
##### Sample 1 ([Source Code](/example/lib/pie_chart/samples/pie_chart_sample1.dart))
<img src="https://github.com/imaNNeoFighT/fl_chart/raw/master/repo_files/images/pie_chart/pie_chart_sample_1.gif" width="300" >


##### Sample 2 ([Source Code](/example/lib/pie_chart/samples/pie_chart_sample2.dart))
<img src="https://github.com/imaNNeoFighT/fl_chart/raw/master/repo_files/images/pie_chart/pie_chart_sample_2.gif" width="300" >
