Merge pull request #3 from SriramKiranSenthilkumar/master

Committed null safety changes

Author: JayavigneshwaranG

lib/main.dart

@@ -19,7 +19,7 @@ class ChartApp extends StatelessWidget {
 
 class MyHomePage extends StatefulWidget {
   // ignore: prefer_const_constructors_in_immutables
-  MyHomePage({Key key}) : super(key: key);
+  MyHomePage({Key? key}) : super(key: key);
 
   @override
   _MyHomePageState createState() => _MyHomePageState();
@@ -45,32 +45,29 @@ class _MyHomePageState extends State<MyHomePage> {
             height: 500,
             width: 320,
             child: SfCartesianChart(
-                backgroundColor: Colors.white,
-                plotAreaBackgroundColor: Colors.white,
-                onTooltipRender: (TooltipArgs args) {
-                  if (args.pointIndex == 0) {
-                    //Tooltip without header
-                    args.header = '';
-                  }
-                  if (args.pointIndex == 1) {
-                    //Tooltip with customized header
-                    args.header = 'Sold';
-                  }
-                  if (args.pointIndex == 2) {
-                    //Tooltip with X and Y positions of data points
-                    args.header = 'x : y';
-                    args.text =
-                        '${args.locationX.floor()} : ${args.locationY.floor()}';
-                  }
-                  if (args.pointIndex == 3) {
-                    //Tooltip with formatted DateTime values
-                    List<CartesianChartPoint<dynamic>> chartdata =
-                        args.dataPoints;
-                    args.header =
-                        DateFormat('d MMM yyyy').format(chartdata[3].x);
-                    args.text = '${chartdata[3].y}';
-                  }
-                },
+              backgroundColor: Colors.white,
+              plotAreaBackgroundColor: Colors.white,
+              onTooltipRender: (TooltipArgs args) {
+                if (args.pointIndex == 0) {
+                  //Tooltip without header
+                  args.header = '';
+                }
+                if (args.pointIndex == 1) {
+                  //Tooltip with customized header
+                  args.header = 'Sold';
+                }
+                if (args.pointIndex == 2) {
+                  //Tooltip with X and Y positions of data points
+                  args.header = 'x : y';
+                  args.text = '${args.locationX!.floor()} : ${args.locationY!.floor()}';
+                }
+                if(args.pointIndex == 3) {
+                  //Tooltip with formatted DateTime values
+                  List<dynamic>? chartdata = args.dataPoints;
+                  args.header = DateFormat('d MMM yyyy').format(chartdata![3].x);
+                  args.text = '${chartdata[3].y}';
+                }
+              },
                 primaryXAxis: DateTimeAxis(
                     interval: 30, intervalType: DateTimeIntervalType.days),
                 // Enable tooltip

pubspec.yaml

@@ -18,7 +18,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.7.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter:
@@ -28,7 +28,7 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^0.1.3
-  syncfusion_flutter_charts: ^18.1.46
+  syncfusion_flutter_charts: ^19.1.55+1
 
 dev_dependencies:
   flutter_test: