### Install Application Bundle

Source: https://github.com/imanneo/fl_chart/blob/main/example/linux/CMakeLists.txt

Configures the installation process to create a relocatable application bundle, including cleaning the build directory, installing the executable, and copying data and libraries.

```cmake
# === Installation ===
# By default, "installing" just makes a relocatable bundle in the build
# directory.
set(BUILD_BUNDLE_DIR "${PROJECT_BINARY_DIR}/bundle")
if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
endif()

# Start with a clean build bundle directory every time.
install(CODE "
  file(REMOVE_RECURSE \"${BUILD_BUNDLE_DIR}/\")
  " COMPONENT Runtime)

set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib")

install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
  COMPONENT Runtime)

install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
  COMPONENT Runtime)

install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
  COMPONENT Runtime)

foreach(bundled_library ${PLUGIN_BUNDLED_LIBRARIES})
  install(FILES "${bundled_library}"
    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
    COMPONENT Runtime)
endforeach(bundled_library)

# Copy the native assets provided by the build.dart from all packages.
set(NATIVE_ASSETS_DIR "${PROJECT_BUILD_DIR}native_assets/linux/")
install(DIRECTORY "${NATIVE_ASSETS_DIR}"
   DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
   COMPONENT Runtime)

# Fully re-copy the assets directory on each build to avoid having stale files
# from a previous install.
set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
install(CODE "
  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
  " COMPONENT Runtime)
install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)

# Install the AOT library on non-Debug builds only.
if(NOT CMAKE_BUILD_TYPE MATCHES "Debug")
  install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
    COMPONENT Runtime)
endif()
```

--------------------------------

### Installation Configuration

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/CMakeLists.txt

Configures installation rules for the application executable, support files, and assets. It ensures files are copied next to the executable for in-place running.

```cmake
# === Installation ===
# Support files are copied into place next to the executable, so that it can
# run in place. This is done instead of making a separate bundle (as on Linux)
# so that building and running from within Visual Studio will work.
set(BUILD_BUNDLE_DIR "$<TARGET_FILE_DIR:${BINARY_NAME}>")
# Make the "install" step default, as it's required to run.
set(CMAKE_VS_INCLUDE_INSTALL_TO_DEFAULT_BUILD 1)
if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
endif()

set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}")

install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
  COMPONENT Runtime)

install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
  COMPONENT Runtime)

install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
  COMPONENT Runtime)

if(PLUGIN_BUNDLED_LIBRARIES)
  install(FILES "${PLUGIN_BUNDLED_LIBRARIES}"
    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
    COMPONENT Runtime)
endif()

# Fully re-copy the assets directory on each build to avoid having stale files
# from a previous install.
set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
install(CODE "
  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
  " COMPONENT Runtime)
install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)

# Install the AOT library on non-Debug builds only.
install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
  CONFIGURATIONS Profile;Release
  COMPONENT Runtime)
```

--------------------------------

### Install Project Dependencies

Source: https://github.com/imanneo/fl_chart/blob/main/CONTRIBUTING.md

Install all necessary packages for the FL Chart project.

```bash
flutter packages get
```

--------------------------------

### Install Xcode Command Line Tools

Source: https://github.com/imanneo/fl_chart/blob/main/example/fastlane/README.md

Ensure you have the latest version of the Xcode command line tools installed before proceeding with fastlane installation.

```sh
xcode-select --install
```

--------------------------------

### Line Chart Samples

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/line_chart.md

Visual examples and source code links for various line chart implementations.

```APIDOC
## Line Chart Samples

### Description
This section provides visual examples and links to source code for different line chart configurations and features.

### Samples
- **Sample 1**: [Source Code](/example/lib/presentation/samples/line/line_chart_sample1.dart)
- **Sample 2**: [Source Code](/example/lib/presentation/samples/line/line_chart_sample2.dart)
- **Sample 3**: [Source Code](/example/lib/presentation/samples/line/line_chart_sample3.dart)
- **Sample 4**: [Source Code](/example/lib/presentation/samples/line/line_chart_sample4.dart)
- **Sample 5**: [Source Code](/example/lib/presentation/samples/line/line_chart_sample5.dart)
- **Sample 6 - Reversed**: [Source Code](/example/lib/presentation/samples/line/line_chart_sample6.dart)
- **Sample 7**: [Source Code](/example/lib/presentation/samples/line/line_chart_sample7.dart)
- **Sample 8**: [Source Code](/example/lib/presentation/samples/line/line_chart_sample8.dart)
- **Sample 9**: [Source Code](/example/lib/presentation/samples/line/line_chart_sample9.dart)
- **Sample 10**: [Source Code](/example/lib/presentation/samples/line/line_chart_sample10.dart)
- **Sample 11**: [Source Code](/example/lib/presentation/samples/line/line_chart_sample11.dart)
```

--------------------------------

### Scatter Chart Samples

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/scatter_chart.md

Visual examples of scatter chart implementations.

```APIDOC
## Scatter Chart Samples

### Sample 1
![Scatter Chart Sample 1](https://github.com/imaNNeo/fl_chart/raw/main/repo_files/images/scatter_chart/scatter_chart_sample_1.gif)

[Source Code](/example/lib/presentation/samples/scatter/scatter_chart_sample1.dart)

### Sample 2
![Scatter Chart Sample 2](https://github.com/imaNNeo/fl_chart/raw/main/repo_files/images/scatter_chart/scatter_chart_sample_2.gif)

[Source Code](/example/lib/presentation/samples/scatter/scatter_chart_sample2.dart)
```

--------------------------------

### Custom Gauge Pointers: Needle and Circle

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/gauge_chart.md

Example of using GaugePointerNeedlePainter and GaugePointerCirclePainter to create a speedometer-like needle with a pivot cap. Both pointers share the same value to align them.

```dart
pointers: const [
  GaugePointer(
    value: 0.65,
    painter: GaugePointerNeedlePainter(length: 70, width: 8, tailLength: 14),
  ),
  GaugePointer(
    value: 0.65,
    painter: GaugePointerCirclePainter(radius: 8, color: Colors.black),
  ),
],
```

--------------------------------

### Gist - Toggleable Tooltip

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/bar_chart.md

A gist demonstrating a toggleable tooltip functionality for charts. This code requires specific setup within a Flutter project.

```dart
import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';

const Color barBackgroundColor = Color(0xff72d7cf);
const Color barColor = Color(0xff374142);
const Color chipBackgroundColor = Color(0xff374142);

class BarChartToggleableTooltipSample extends StatefulWidget {
  const BarChartToggleableTooltipSample({super.key});

  @override
  State<StatefulWidget> createState() => _BarChartToggleableTooltipSampleState();
}

class _BarChartToggleableTooltipSampleState extends State<BarChartToggleableTooltipSample> {
  @override
  Widget build(BuildContext context) {
    return AspectRatio(
      aspectRatio: 1.70,
      child: Card(
        elevation: 0,
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(4)),
        color: barBackgroundColor,
        child: Padding(padding: const EdgeInsets.all(16), child: _BarChart()),
      ),
    );
  }
}

class _BarChart extends StatefulWidget {
  const _BarChart();

  @override
  State<_BarChart> createState() => _BarChartState();
}

class _BarChartState extends State<_BarChart> {
  int touchedIndex = -1;

  @override
  Widget build(BuildContext context) {
    return BarChart(
      BarChartData(
        alignment: BarChartAlignment.center,
        barTouchData: BarTouchData(
          handleBuiltInTouches: false,
          touchTooltipData: BarTouchTooltipData(
            tooltipBgColor: Colors.grey.shade800,
            tooltipRoundedRadius: 10,
            getTooltipItem: (
              BarChartGroupData group,
              int groupIndex,
              BarChartRodData rod,
              int rodIndex,
            ) {
              return BarTooltipItem(
                rod.toY.round().toString(),
                const TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 14),
              );
            },
          ),
          touchCallback: (FlTouchEvent event, BarTouchResponse? response) {
            setState(() {
              if (response?.spot == null || response?.touchHeight == null) {
                touchedIndex = -1;
              } else {
                touchedIndex = response!.spot!.touchedBarGroupIndex;
              }
            });
          },
        ),
        titlesData: FlTitlesData(
          show: true,
          bottomTitles: AxisTitles(
            sideTitles: SideTitles(
              showTitles: true,
              reservedSize: 30,
              getTitlesWidget: (value, meta) {
                switch (value.toInt()) {
                  case 0:
                    return const Text('Mn', overflow: TextOverflow.ellipsis);
                  case 1:
                    return const Text('Te', overflow: TextOverflow.ellipsis);
                  case 2:
                    return const Text('Wd', overflow: TextOverflow.ellipsis);
                  case 3:
                    return const Text('Th', overflow: TextOverflow.ellipsis);
                  case 4:
                    return const Text('Fr', overflow: TextOverflow.ellipsis);
                  case 5:
                    return const Text('Sa', overflow: TextOverflow.ellipsis);
                  case 6:
                    return const Text('Su', overflow: TextOverflow.ellipsis);
                  default:
                    return const SizedBox();
                }
              },
            ),
          ),
          leftTitles: AxisTitles(
            sideTitles: SideTitles(showTitles: false),
          ),
          topTitles: AxisTitles(
            sideTitles: SideTitles(showTitles: false),
          ),
          rightTitles: AxisTitles(
            sideTitles: SideTitles(showTitles: false),
          ),
        ),
        gridData: GridData(
          show: true,
          drawVerticalLine: false,
          getDrawingHorizontalLine: (value) => const FlLine(color: Colors.transparent),
          drawHorizontalLine: true,
          getDrawingVerticalLine: (value) => const FlLine(color: Colors.transparent),
          drawVerticalLine: true,
        ),
        borderData: FlBorderData(
          show: false,
        ),
        backgroundColor: Colors.transparent,
        titles: null,
        extraLinesData: [],
        barGroups: [
          BarChartGroupData(
            x: 0,
            barRods: [
              BarChartRodData(toY: 8, width: 16, color: touchedIndex == 0 ? Colors.pink : barColor, borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 1,
            barRods: [
              BarChartRodData(toY: 10, width: 16, color: touchedIndex == 1 ? Colors.pink : barColor, borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 2,
            barRods: [
              BarChartRodData(toY: 14, width: 16, color: touchedIndex == 2 ? Colors.pink : barColor, borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 3,
            barRods: [
              BarChartRodData(toY: 13, width: 16, color: touchedIndex == 3 ? Colors.pink : barColor, borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 4,
            barRods: [
              BarChartRodData(toY: 11, width: 16, color: touchedIndex == 4 ? Colors.pink : barColor, borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 5,
            barRods: [
              BarChartRodData(toY: 12, width: 16, color: touchedIndex == 5 ? Colors.pink : barColor, borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 6,
            barRods: [
              BarChartRodData(toY: 10, width: 16, color: touchedIndex == 6 ? Colors.pink : barColor, borderRadius: BorderRadius.zero)
            ],
          ),
        ],
      ),
    );
  }
}

```

--------------------------------

### Set Flutter Library Path

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/flutter/CMakeLists.txt

Defines the path to the Flutter library DLL. This is published to the parent scope for use in the install step.

```cmake
set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/flutter_windows.dll")

# Published to parent scope for install step.
set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
set(AOT_LIBRARY "${PROJECT_DIR}/build/windows/app.so" PARENT_SCOPE)
```

--------------------------------

### Navigate to Project Directory

Source: https://github.com/imanneo/fl_chart/blob/main/CONTRIBUTING.md

Change the current directory to the cloned fl_chart project.

```bash
cd fl_chart
```

--------------------------------

### Run Pre-Push Checks

Source: https://github.com/imanneo/fl_chart/blob/main/CONTRIBUTING.md

Execute both tests and style checks sequentially before pushing your code. This command runs 'make runTests' followed by 'make checkstyle'.

```bash
make sure
```

--------------------------------

### Apply Absolute Angle to RadarChart Title

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/migration_guides/0.55.0/MIGRATION_00_55_00.md

Example of applying an absolute angle to a RadarChart title for custom rotation.

```dart
RadarChartTitle(text: 'Desktop', angle: 90);
```

--------------------------------

### Apply Relative Angle to RadarChart Title

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/migration_guides/0.55.0/MIGRATION_00_55_00.md

Example of applying a relative angle to a RadarChart title for custom rotation.

```dart
RadarChartTitle(text: 'Desktop', angle: angle + 90);
```

--------------------------------

### Format Code

Source: https://github.com/imanneo/fl_chart/blob/main/CONTRIBUTING.md

Run this command to automatically reformat your code according to project standards.

```bash
make format
```

--------------------------------

### Apply Standard Build Settings

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/runner/CMakeLists.txt

Applies a standard set of build settings to the executable target. This can be customized or removed if different build configurations are needed.

```cmake
# Apply the standard set of build settings. This can be removed for applications
# that need different build settings.
apply_standard_settings(${BINARY_NAME})
```

--------------------------------

### Project-Level CMake Configuration

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/CMakeLists.txt

Sets up the minimum CMake version, project name, and executable name. It also includes modern CMake policies and defines build configurations.

```cmake
cmake_minimum_required(VERSION 3.14)
project(fl_chart_app LANGUAGES CXX)

# The name of the executable created for the application. Change this to change
# the on-disk name of your application.
set(BINARY_NAME "fl_chart_app")

# Explicitly opt in to modern CMake behaviors to avoid warnings with recent
# versions of CMake.
cmake_policy(SET CMP0063 NEW)
```

--------------------------------

### Basic Bar Chart Usage

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/bar_chart.md

Demonstrates the fundamental way to create a Bar Chart using the BarChart widget and BarChartData.

```APIDOC
## Basic Bar Chart Usage

### Description
This section shows the basic implementation of a Bar Chart.

### Method
Widget Instantiation

### Endpoint
N/A

### Request Body
N/A

### Request Example
```dart
BarChart(
  BarChartData(
    // Configuration for the bar chart data
  ),
  duration: Duration(milliseconds: 150), // Optional: Animation duration
  curve: Curves.linear, // Optional: Animation curve
);
```

### Response
N/A
```

--------------------------------

### Clone FL Chart Repository

Source: https://github.com/imanneo/fl_chart/blob/main/CONTRIBUTING.md

Clone the FL Chart repository to your local machine. Replace 'your-username' with your GitHub username.

```bash
git clone https://github.com/your-username/fl_chart.git
```

--------------------------------

### Define C++ Wrapper Plugin Sources

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/flutter/CMakeLists.txt

Lists the C++ source files specific to plugin registration and prepends the wrapper root directory. These are used when building the plugin wrapper library.

```cmake
list(APPEND CPP_WRAPPER_SOURCES_PLUGIN
  "plugin_registrar.cc"
)
list(TRANSFORM CPP_WRAPPER_SOURCES_PLUGIN PREPEND "${WRAPPER_ROOT}/")
```

--------------------------------

### Find System Dependencies

Source: https://github.com/imanneo/fl_chart/blob/main/example/linux/flutter/CMakeLists.txt

Finds required system libraries (GTK, GLIB, GIO) using PkgConfig for the Flutter application.

```cmake
find_package(PkgConfig REQUIRED)
pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
pkg_check_modules(GLIB REQUIRED IMPORTED_TARGET glib-2.0)
pkg_check_modules(GIO REQUIRED IMPORTED_TARGET gio-2.0)
```

--------------------------------

### Bar Chart Sample 1: Basic Bar Chart

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/bar_chart.md

Demonstrates a simple bar chart. Ensure the fl_chart package is added to your project dependencies.

```dart
import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';

class BarChartSample1 extends StatefulWidget {
  const BarChartSample1({super.key});

  @override
  State<StatefulWidget> createState() => _BarChartSample1State();
}

class _BarChartSample1State extends State<BarChartSample1> {
  @override
  Widget build(BuildContext context) {
    return AspectRatio(
      aspectRatio: 1.70,
      child: Card(
        elevation: 0,
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(4)),
        color: const Color(0xff0293ee),
        child: Padding(padding: const EdgeInsets.all(16), child: _BarChart()),
      ),
    );
  }
}

class _BarChart extends StatelessWidget {
  const _BarChart();

  @override
  Widget build(BuildContext context) {
    return BarChart(
      BarChartData(
        alignment: BarChartAlignment.center,
        barTouchData: BarTouchData(
          enabled: false,
        ),
        titlesData: FlTitlesData(
          show: true,
          bottomTitles: AxisTitles(
            sideTitles: SideTitles(
              showTitles: true,
              reservedSize: 30,
              getTitlesWidget: (value, meta) {
                switch (value.toInt()) {
                  case 0:
                    return const Text('Mn', overflow: TextOverflow.ellipsis);
                  case 1:
                    return const Text('Te', overflow: TextOverflow.ellipsis);
                  case 2:
                    return const Text('Wd', overflow: TextOverflow.ellipsis);
                  case 3:
                    return const Text('Th', overflow: TextOverflow.ellipsis);
                  case 4:
                    return const Text('Fr', overflow: TextOverflow.ellipsis);
                  case 5:
                    return const Text('Sa', overflow: TextOverflow.ellipsis);
                  case 6:
                    return const Text('Su', overflow: TextOverflow.ellipsis);
                  default:
                    return const SizedBox();
                }
              },
            ),
          ),
          leftTitles: AxisTitles(
            sideTitles: SideTitles(showTitles: false),
          ),
          topTitles: AxisTitles(
            sideTitles: SideTitles(showTitles: false),
          ),
          rightTitles: AxisTitles(
            sideTitles: SideTitles(showTitles: false),
          ),
        ),
        gridData: GridData(
          show: true,
          drawVerticalLine: false,
          getDrawingHorizontalLine: (value) => const FlLine(color: Color(0xff374142), strokeWidth: 1),
          drawHorizontalLine: true,
          getDrawingVerticalLine: (value) => const FlLine(color: Color(0xff374142), strokeWidth: 1),
          drawVerticalLine: true,
        ),
        borderData: FlBorderData(
          show: false,
        ),
        backgroundColor: Colors.transparent,
        titles: null,
        extraLinesData: [],
        barGroups: [
          BarChartGroupData(
            x: 0,
            barRods: [
              BarChartRodData(toY: 8, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 1,
            barRods: [
              BarChartRodData(toY: 10, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 2,
            barRods: [
              BarChartRodData(toY: 14, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 3,
            barRods: [
              BarChartRodData(toY: 13, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 4,
            barRods: [
              BarChartRodData(toY: 11, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 5,
            barRods: [
              BarChartRodData(toY: 12, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 6,
            barRods: [
              BarChartRodData(toY: 10, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
        ],
      ),
    );
  }
}

```

--------------------------------

### Define Project and Executable Name

Source: https://github.com/imanneo/fl_chart/blob/main/example/linux/CMakeLists.txt

Sets the minimum CMake version and the project name, along with the desired name for the application's executable.

```cmake
cmake_minimum_required(VERSION 3.13)
project(runner LANGUAGES CXX)

# The name of the executable created for the application. Change this to change
# the on-disk name of your application.
set(BINARY_NAME "fLChartApp")
# The unique GTK application identifier for this application. See:
# https://wiki.gnome.org/HowDoI/ChooseApplicationID
set(APPLICATION_ID "dev.flchart.app")
```

--------------------------------

### Basic RadarChart Implementation

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/radar_chart.md

This is the fundamental way to render a RadarChart. Ensure RadarChartData is properly configured.

```dart
RadarChart(
  RadarChartData(
    // read about it in the RadarChartData section
  ),
  swapAnimationDuration: Duration(milliseconds: 150), // Optional
  swapAnimationCurve: Curves.linear, // Optional
);
```

--------------------------------

### Create Flutter Wrapper Plugin Library

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/flutter/CMakeLists.txt

Creates a STATIC library target 'flutter_wrapper_plugin' using core and plugin-specific C++ sources. It applies standard build settings, sets visibility to hidden, links against the 'flutter' target, and includes the wrapper's public headers.

```cmake
add_library(flutter_wrapper_plugin STATIC
  ${CPP_WRAPPER_SOURCES_CORE}
  ${CPP_WRAPPER_SOURCES_PLUGIN}
)
apply_standard_settings(flutter_wrapper_plugin)
set_target_properties(flutter_wrapper_plugin PROPERTIES
  POSITION_INDEPENDENT_CODE ON)
set_target_properties(flutter_wrapper_plugin PROPERTIES
  CXX_VISIBILITY_PRESET hidden)
target_link_libraries(flutter_wrapper_plugin PUBLIC flutter)
target_include_directories(flutter_wrapper_plugin PUBLIC
  "${WRAPPER_ROOT}/include"
)
add_dependencies(flutter_wrapper_plugin flutter_assemble)
```

--------------------------------

### Check Code Style

Source: https://github.com/imanneo/fl_chart/blob/main/CONTRIBUTING.md

Run this command to ensure your code adheres to formatting guidelines. It checks for analysis warnings/errors and verifies code formatting.

```bash
make checkstyle
```

--------------------------------

### Solid Color Representation (Now)

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/migration_guides/0.50.0/MIGRATION_00_50_00.md

Demonstrates the current approach for defining a solid color by using the `color` property.

```dart
LineChartBarData(
  color: Colors.red
)
```

--------------------------------

### Define Executable Target and Source Files

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/runner/CMakeLists.txt

Defines the main executable target for the Windows runner and lists all source files required for the build. Ensure any new source files are added here.

```cmake
cmake_minimum_required(VERSION 3.14)
project(runner LANGUAGES CXX)

# Define the application target. To change its name, change BINARY_NAME in the
# top-level CMakeLists.txt, not the value here, or `flutter run` will no longer
# work.
#
# Any new source files that you add to the application should be added here.
add_executable(${BINARY_NAME} WIN32
  "flutter_window.cpp"
  "main.cpp"
  "utils.cpp"
  "win32_window.cpp"
  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
  "Runner.rc"
  "runner.exe.manifest"
)
```

--------------------------------

### Basic Pie Chart Implementation

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/pie_chart.md

Instantiate a PieChart widget with PieChartData. Optional duration and curve properties can control implicit animations.

```dart
PieChart(
  PieChartData(
    // read about it in the PieChartData section
  ),
  duration: Duration(milliseconds: 150), // Optional
  curve: Curves.linear, // Optional
);
```

--------------------------------

### Create Flutter Wrapper App Library

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/flutter/CMakeLists.txt

Creates a STATIC library target 'flutter_wrapper_app' using core and application-specific C++ sources. It applies standard build settings, links against the 'flutter' target, and includes the wrapper's public headers.

```cmake
add_library(flutter_wrapper_app STATIC
  ${CPP_WRAPPER_SOURCES_CORE}
  ${CPP_WRAPPER_SOURCES_APP}
)
apply_standard_settings(flutter_wrapper_app)
target_link_libraries(flutter_wrapper_app PUBLIC flutter)
target_include_directories(flutter_wrapper_app PUBLIC
  "${WRAPPER_ROOT}/include"
)
add_dependencies(flutter_wrapper_app flutter_assemble)
```

--------------------------------

### Run All Tests

Source: https://github.com/imanneo/fl_chart/blob/main/CONTRIBUTING.md

Execute all unit tests to ensure code correctness. This command internally runs 'flutter test'.

```bash
make runTests
```

--------------------------------

### Define C++ Wrapper Core Sources

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/flutter/CMakeLists.txt

Lists the core C++ source files for the wrapper and prepends the wrapper root directory to each path. These files contain fundamental implementations for the C++ client wrapper.

```cmake
list(APPEND CPP_WRAPPER_SOURCES_CORE
  "core_implementations.cc"
  "standard_codec.cc"
)
list(TRANSFORM CPP_WRAPPER_SOURCES_CORE PREPEND "${WRAPPER_ROOT}/")
```

--------------------------------

### Basic Gauge Chart Initialization

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/gauge_chart.md

Initialize a basic Gauge Chart with GaugeChartData. Use optional duration and curve properties for animations.

```dart
GaugeChart(
  GaugeChartData(
    // read about it in the GaugeChartData ring
  ),
  duration: Duration(milliseconds: 150), // Optional
  curve: Curves.linear, // Optional
);
```

--------------------------------

### Common Bash Commands for FL Chart

Source: https://github.com/imanneo/fl_chart/blob/main/CLAUDE.md

A collection of make commands for running tests, analysis, formatting, and code generation within the FL Chart project. Use these for development and before pushing changes.

```bash
make sure
```

```bash
make runTests
```

```bash
make analyze
```

```bash
make checkFormat
```

```bash
make format
```

```bash
make checkstyle
```

```bash
make codeGen
```

```bash
flutter test test/chart/line_chart/line_chart_painter_test.dart
```

--------------------------------

### LineTouchTooltipData Configuration

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/line_chart.md

Configuration for the appearance and behavior of tooltips in LineChart.

```APIDOC
## LineTouchTooltipData

### Description
Configuration for the appearance and behavior of tooltips in LineChart.

### Properties
- **tooltipBorder** (BorderSide) - Border of the tooltip bubble. Default: `BorderSide.none`
- **tooltipBorderRadius** (BorderRadius) - Background corner radius of the tooltip bubble. Default: `BorderRadius.circular(4)`
- **tooltipPadding** (EdgeInsets) - Padding of the tooltip. Default: `EdgeInsets.symmetric(horizontal: 16, vertical: 8)`
- **tooltipMargin** (double) - Margin between the tooltip and the touched spot. Default: `16`
- **tooltipHorizontalAlignment** (FLHorizontalAlignment) - Horizontal alignment of tooltip relative to the spot. Default: `FLHorizontalAlignment.center`
- **tooltipHorizontalOffset** (double) - Horizontal offset of tooltip. Default: `0`
- **maxContentWidth** (double) - Maximum width of the tooltip (if a text row is wider than this, then the text breaks to a new line). Default: `120`
- **getTooltipItems** (Function) - A callback that retrieves a list of [LineTooltipItem](#LineTooltipItem) by the given list of [LineBarSpot](#LineBarSpot). Default: `defaultLineTooltipItem`
- **fitInsideHorizontally** (boolean) - Forces tooltip to horizontally shift inside the chart's bounding box. Default: `false`
- **fitInsideVertically** (boolean) - Forces tooltip to vertically shift inside the chart's bounding box. Default: `false`
- **showOnTopOfTheChartBoxArea** (boolean) - Forces the tooltip container to the top of the line. Default: `false`
- **getTooltipColor** (Function) - A callback that retrieves the Color for each touched spot separately from the given [LineBarSpot](#LineBarSpot) to set the background color of the tooltip bubble. Default: `Colors.blueGrey.darken(15)`
```

--------------------------------

### PieChartData Configuration

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/pie_chart.md

Detailed properties for configuring the PieChartData, including sections, spacing, and touch handling.

```APIDOC
## PieChartData Configuration

### Description
This section details the properties available within `PieChartData` for customizing the appearance and behavior of the pie chart.

### Method
N/A (Data Structure)

### Endpoint
N/A (Data Structure)

### Parameters
#### PieChartData Properties
- **sections** (List<[PieChartSectionData](#PieChartSectionData)>) - List of sections to display on the pie chart. Defaults to an empty list `[]`.
- **centerSpaceRadius** (double) - The radius of the free space in the center of the pie chart. Set to `double.infinity` to auto-calculate based on view size. Defaults to `double.nan`.
- **centerSpaceColor** (Color) - The color of the free space in the center. Defaults to `Colors.transparent`.
- **sectionsSpace** (double) - The space between sections (margin). Does not work on HTML renderer. Defaults to `2`.
- **startDegreeOffset** (double) - The degree offset for sections around the pie chart. Should be between 0 and 360. Defaults to `0`.
- **pieTouchData** ([PieTouchData](#pietouchdata-read-about-touch-handling)) - Holds touch interactivity details. Defaults to `PieTouchData()`.
- **borderData** ([FlBorderData](base_chart.md#FlBorderData)) - Defines the border around the chart. Defaults to `FlBorderData()`.
- **titleSunbeamLayout** (bool) - Determines if titles on each section should rotate. Defaults to `false`.

### Request Example
N/A (Data Structure Configuration)

### Response
N/A (Data Structure Configuration)

### See Also
- [PieChartSectionData](#PieChartSectionData)
- [PieTouchData](#pietouchdata-read-about-touch-handling)
- [FlBorderData](base_chart.md#FlBorderData)
```

--------------------------------

### ShowingTooltipIndicators Properties

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/line_chart.md

Configuration for which spots should have tooltips displayed.

```APIDOC
## ShowingTooltipIndicators

### Description
Determines which spots should trigger the display of tooltips in the chart.

### Properties
#### Path Parameters
- **showingSpots** (List<ShowingTooltipIndicators>) - Optional - Specifies the spots for which each tooltip should be shown.
```

--------------------------------

### Build Configuration Options

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/CMakeLists.txt

Defines the available build configurations (Debug, Profile, Release) based on whether the generator is multi-config. It also sets the default build type if not specified.

```cmake
# Define build configuration option.
get_property(IS_MULTICONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
if(IS_MULTICONFIG)
  set(CMAKE_CONFIGURATION_TYPES "Debug;Profile;Release"
    CACHE STRING "" FORCE)
else()
  if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
    set(CMAKE_BUILD_TYPE "Debug" CACHE
      STRING "Flutter build mode" FORCE)
    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
      "Debug" "Profile" "Release")
  endif()
endif()
```

--------------------------------

### Flutter Tool Backend Command

Source: https://github.com/imanneo/fl_chart/blob/main/example/linux/flutter/CMakeLists.txt

Configures a custom command to run the Flutter tool backend script for building the Flutter library and headers.

```cmake
add_custom_command(
  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
  COMMAND ${CMAKE_COMMAND} -E env
    ${FLUTTER_TOOL_ENVIRONMENT}
    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
      ${FLUTTER_TARGET_PLATFORM} ${CMAKE_BUILD_TYPE}
  VERBATIM
)
```

--------------------------------

### Link Libraries and Include Directories

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/runner/CMakeLists.txt

Specifies the libraries and include directories required for the project. This includes Flutter's core libraries, wrapper, and Windows-specific libraries like dwmapi.lib.

```cmake
# Add dependency libraries and include directories. Add any application-specific
# dependencies here.
target_link_libraries(${BINARY_NAME} PRIVATE flutter flutter_wrapper_app)
target_link_libraries(${BINARY_NAME} PRIVATE "dwmapi.lib")
target_include_directories(${BINARY_NAME} PRIVATE "${CMAKE_SOURCE_DIR}")
```

--------------------------------

### Define Flutter Tool Backend Custom Command

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/flutter/CMakeLists.txt

Sets up a custom command to execute the Flutter tool backend script. This command is designed to run every time by using a phony output file, ensuring that the Flutter library and associated files are generated.

```cmake
set(PHONY_OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/_phony_")
set_source_files_properties("${PHONY_OUTPUT}" PROPERTIES SYMBOLIC TRUE)
add_custom_command(
  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
    ${CPP_WRAPPER_SOURCES_CORE} ${CPP_WRAPPER_SOURCES_PLUGIN}
    ${CPP_WRAPPER_SOURCES_APP}
    ${PHONY_OUTPUT}
  COMMAND ${CMAKE_COMMAND} -E env
    ${FLUTTER_TOOL_ENVIRONMENT}
    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.bat"
      ${FLUTTER_TARGET_PLATFORM} $<CONFIG>
  VERBATIM
)
```

--------------------------------

### Pie Chart Usage

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/pie_chart.md

Basic implementation of a Pie Chart using the PieChart widget and PieChartData.

```APIDOC
## Pie Chart Usage

### Description
This section demonstrates the basic usage of the `PieChart` widget. It shows how to initialize the chart with `PieChartData` and optional animation properties.

### Method
N/A (Widget Implementation)

### Endpoint
N/A (Widget Implementation)

### Parameters
#### Widget Properties
- **duration** (Duration) - Optional - Controls the animation duration when the chart's state changes.
- **curve** (Curve) - Optional - Defines the animation curve for state transitions.

### Request Example
```dart
PieChart(
  PieChartData(
    // ... PieChartData configuration ...
  ),
  duration: Duration(milliseconds: 150), // Optional
  curve: Curves.linear, // Optional
);
```

### Response
N/A (Widget Implementation)

### Notes
If a padding widget surrounds the `PieChart`, ensure `PieChartData.centerSpaceRadius` is set to `double.infinity` for correct rendering.
```

--------------------------------

### Find and Check GTK Dependency

Source: https://github.com/imanneo/fl_chart/blob/main/example/linux/CMakeLists.txt

Uses PkgConfig to find and check for the GTK 3.0 library, making its imported target available for use.

```cmake
# System-level dependencies.
find_package(PkgConfig REQUIRED)
pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
```

--------------------------------

### Custom Gauge Markers: Min and Max Lines

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/gauge_chart.md

Demonstrates using GaugeMarker with GaugeMarkerLinePainter to add 'Min' and 'Max' markers at specific values on the gauge. The markers are positioned at the center and styled with different colors and labels.

```dart
markers: [
  GaugeMarker(
    value: 0.234,
    position: GaugeTickPosition.center,
    painter: GaugeMarkerLinePainter(
      length: 40,
      thickness: 4,
      color: Colors.green,
      label: 'Min',
      labelStyle: TextStyle(color: Colors.green, fontWeight: FontWeight.bold),
      labelSide: GaugeMarkerLabelSide.inward,
    ),
  ),
  GaugeMarker(
    value: 0.71,
    position: GaugeTickPosition.center,
    painter: GaugeMarkerLinePainter(
      length: 40,
      thickness: 4,
      color: Colors.red,
      label: 'Max',
      labelStyle: TextStyle(color: Colors.red, fontWeight: FontWeight.bold),
      labelSide: GaugeMarkerLabelSide.inward,
    ),
  ),
],
```

--------------------------------

### Bar Chart Sample 7: Bar Chart with Tooltip

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/bar_chart.md

Features a bar chart with interactive tooltips. Ensure fl_chart is added to your project.

```dart
import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';

class BarChartSample7 extends StatefulWidget {
  const BarChartSample7({super.key});

  @override
  State<StatefulWidget> createState() => _BarChartSample7State();
}

class _BarChartSample7State extends State<BarChartSample7> {
  @override
  Widget build(BuildContext context) {
    return AspectRatio(
      aspectRatio: 1.70,
      child: Card(
        elevation: 0,
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(4)),
        color: const Color(0xff0293ee),
        child: Padding(padding: const EdgeInsets.all(16), child: _BarChart()),
      ),
    );
  }
}

class _BarChart extends StatelessWidget {
  const _BarChart();

  @override
  Widget build(BuildContext context) {
    return BarChart(
      BarChartData(
        alignment: BarChartAlignment.center,
        barTouchData: BarTouchData(
          enabled: true,
          allowTouchFrameLine: false,
          handleBuiltInTouches: true,
          touchTooltipData: BarTouchTooltipData(
            tooltipBgColor: Colors.blueGrey,
            getTooltipItem: (
              BarChartGroupData group,
              int groupIndex,
              BarChartRodData rod,
              int rodIndex,
            ) {
              return BarTooltipItem(
                rod.toY.round().toString(),
                const TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 14),
              );
            },
          ),
        ),
        titlesData: FlTitlesData(
          show: true,
          bottomTitles: AxisTitles(
            sideTitles: SideTitles(
              showTitles: true,
              reservedSize: 30,
              getTitlesWidget: (value, meta) {
                switch (value.toInt()) {
                  case 0:
                    return const Text('Mn', overflow: TextOverflow.ellipsis);
                  case 1:
                    return const Text('Te', overflow: TextOverflow.ellipsis);
                  case 2:
                    return const Text('Wd', overflow: TextOverflow.ellipsis);
                  case 3:
                    return const Text('Th', overflow: TextOverflow.ellipsis);
                  case 4:
                    return const Text('Fr', overflow: TextOverflow.ellipsis);
                  case 5:
                    return const Text('Sa', overflow: TextOverflow.ellipsis);
                  case 6:
                    return const Text('Su', overflow: TextOverflow.ellipsis);
                  default:
                    return const SizedBox();
                }
              },
            ),
          ),
          leftTitles: AxisTitles(
            sideTitles: SideTitles(showTitles: false),
          ),
          topTitles: AxisTitles(
            sideTitles: SideTitles(showTitles: false),
          ),
          rightTitles: AxisTitles(
            sideTitles: SideTitles(showTitles: false),
          ),
        ),
        gridData: GridData(
          show: true,
          drawVerticalLine: false,
          getDrawingHorizontalLine: (value) => const FlLine(color: Color(0xff374142), strokeWidth: 1),
          drawHorizontalLine: true,
          getDrawingVerticalLine: (value) => const FlLine(color: Color(0xff374142), strokeWidth: 1),
          drawVerticalLine: true,
        ),
        borderData: FlBorderData(
          show: false,
        ),
        backgroundColor: Colors.transparent,
        titles: null,
        extraLinesData: [],
        barGroups: [
          BarChartGroupData(
            x: 0,
            barRods: [
              BarChartRodData(toY: 8, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 1,
            barRods: [
              BarChartRodData(toY: 10, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 2,
            barRods: [
              BarChartRodData(toY: 14, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 3,
            barRods: [
              BarChartRodData(toY: 13, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 4,
            barRods: [
              BarChartRodData(toY: 11, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 5,
            barRods: [
              BarChartRodData(toY: 12, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
          BarChartGroupData(
            x: 6,
            barRods: [
              BarChartRodData(toY: 10, width: 16, color: Colors.white.withOpacity(0.6), borderRadius: BorderRadius.zero)
            ],
          ),
        ],
      ),
    );
  }
}

```

--------------------------------

### LineTooltipItem Configuration

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/line_chart.md

Configuration for individual items within a LineChart tooltip.

```APIDOC
## LineTooltipItem

### Description
Configuration for individual items within a LineChart tooltip.

### Properties
- **text** (String) - Text string of each row in the tooltip bubble. Default: `null`
- **textStyle** (TextStyle) - TextStyle of the showing text row. Default: `null`
- **textAlign** (TextAlign) - TextAlign of the showing text row. Default: `TextAlign.center`
- **textDirection** (TextDirection) - TextDirection of the showing text row. Default: `TextDirection.ltr`
- **children** (List<TextSpan>) - Pass additional InlineSpan children for a more advance tooltip. Default: `null`
```

--------------------------------

### Unicode and Standard Compilation Settings

Source: https://github.com/imanneo/fl_chart/blob/main/example/windows/CMakeLists.txt

Enables Unicode support and applies standard compilation features and options, including C++17 standard, warning levels, and exception handling.

```cmake
# Use Unicode for all projects.
add_definitions(-DUNICODE -D_UNICODE)

# Compilation settings that should be applied to most targets.
#
# Be cautious about adding new options here, as plugins use this function by
# default. In most cases, you should add new options to specific targets instead
# of modifying this function.
function(APPLY_STANDARD_SETTINGS TARGET)
  target_compile_features(${TARGET} PUBLIC cxx_std_17)
  target_compile_options(${TARGET} PRIVATE /W4 /WX /wd"4100")
  target_compile_options(${TARGET} PRIVATE /EHsc)
  target_compile_definitions(${TARGET} PRIVATE "_HAS_EXCEPTIONS=0")
  target_compile_definitions(${TARGET} PRIVATE "$<$<CONFIG:Debug>:_DEBUG>")
endfunction()
```

--------------------------------

### LineTouchData Configuration

Source: https://github.com/imanneo/fl_chart/blob/main/repo_files/documentations/line_chart.md

Configuration for touch interactions on LineChart.

```APIDOC
## LineTouchData

### Description
Configuration for touch interactions on LineChart, including tooltips and indicators.

### Properties
- **enabled** (boolean) - Determines whether to enable or disable touch behaviors. Default: `true`
- **mouseCursorResolver** (Function) - You can change the mouse cursor based on the provided [FlTouchEvent](https://github.com/imaNNeo/fl_chart/blob/main/repo_files/documentations/base_chart.md#fltouchevent) and [LineTouchResponse](#LineTouchResponse). Default: `MouseCursor.defer`
- **touchTooltipData** (LineTouchTooltipData) - Determines how to show the tooltip on top of touched spots (appearance of the showing tooltip bubble). Default: `LineTouchTooltipData`
- **getTouchedSpotIndicator** (Function) - A callback that retrieves a list of [TouchedSpotIndicatorData](#TouchedSpotIndicatorData) by the given list of [LineBarSpot](#LineBarSpot) for showing the indicators on touched spots. Default: `defaultTouchedIndicators`
- **touchSpotThreshold** (double) - The threshold of the touch accuracy. Default: `10`
- **distanceCalculator** (Function) - A function to calculate the distance between a spot and a touch event. Default: `_xDistance`
- **handleBuiltInTouches** (boolean) - Set this to true if you want the built-in touch handling (show a tooltip bubble and an indicator on touched spots). Default: `true`
- **getTouchLineStart** (Function) - Controls where the line starts, default is bottom of the chart. Default: `defaultGetTouchLineStart`
- **getTouchLineEnd** (Function) - Controls where the line ends, default is the touch point. Default: `defaultGetTouchLineEnd`
- **touchCallback** (Function) - Listen to this callback to retrieve touch/pointer events and responses, it gives you a [FlTouchEvent](https://github.com/imaNNeo/fl_chart/blob/main/repo_files/documentations/base_chart.md#fltouchevent) and [LineTouchResponse](#LineTouchResponse). Default: `null`
- **longPressDuration** (Duration) - Allows you to customize the duration of the longPress gesture. If null, the duration of the longPressGesture is [kLongPressTimeout](https://api.flutter.dev/flutter/gestures/kLongPressTimeout-constant.html). Default: `null`
```