Fixed out of charts tooltips & added date edit null check

lib/dateRangeDialog.dart

@@ -96,7 +96,7 @@ class _DateRangeDialogState extends State<DateRangeDialog> {
                   initialDate: selectedRange.start
                 );
 
-                if(newDate != selectedRange.start) {
+                if(newDate != null && newDate != selectedRange.start) {
                   fromController.text = dateFormat.format(newDate);
                   selectedRange = DateTimeRange(
                       start: newDate,
@@ -127,7 +127,7 @@ class _DateRangeDialogState extends State<DateRangeDialog> {
                   initialDate: selectedRange.end
                 );
 
-                if(newDate != selectedRange.end) {
+                if(newDate != null && newDate != selectedRange.end) {
                   toController.text = dateFormat.format(newDate);
                   selectedRange = DateTimeRange(
                     start: selectedRange.start,

lib/main.dart

@@ -519,6 +519,23 @@ class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
     );
 
     return LineChartData(
+      lineTouchData: LineTouchData(
+        touchTooltipData: LineTouchTooltipData(
+          getTooltipItems: (List<LineBarSpot> touchedBarSpots) {
+            return touchedBarSpots.map((barSpot) {
+              if (barSpot.x < start || barSpot.x > end) return null;
+              return LineTooltipItem(
+                barSpot.x.toString(),
+                TextStyle(
+                  color: data.gradientColors[1],
+                  fontWeight: FontWeight.bold,
+                  fontSize: 14
+                )
+              );
+            }).toList();
+          },
+        ),
+      ),
       clipData: FlClipData.horizontal(),
       gridData: FlGridData(
         show: true,
@@ -633,6 +650,23 @@ class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
     );
 
     return LineChartData(
+      lineTouchData: LineTouchData(
+        touchTooltipData: LineTouchTooltipData(
+          getTooltipItems: (List<LineBarSpot> touchedBarSpots) {
+            return touchedBarSpots.map((barSpot) {
+              if (barSpot.x < start || barSpot.x > end) return null;
+              return LineTooltipItem(
+                barSpot.x.toString(),
+                TextStyle(
+                  color: data.gradientColors[1],
+                  fontWeight: FontWeight.bold,
+                  fontSize: 14
+                )
+              );
+            }).toList();
+          },
+        ),
+      ),
       clipData: FlClipData.horizontal(),
       gridData: FlGridData(
         show: true,

pubspec.lock

@@ -56,7 +56,7 @@ packages:
       name: equatable
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.1"
+    version: "1.2.5"
   fake_async:
     dependency: transitive
     description:
@@ -136,7 +136,7 @@ packages:
       name: path_drawing
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.1"
+    version: "0.4.1+1"
   path_parsing:
     dependency: transitive
     description:

pubspec.yaml

@@ -11,7 +11,7 @@ description: A mobile app developed with Flutter to view Covid19 statistics.
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: 2.0.1+9
+version: 2.0.2+9
 
 environment:
   sdk: ">=2.2.2 <3.0.0"