Change the epoch timestamp unit from seconds to milliseconds

Author: h65wang

example/lib/main.dart

@@ -69,7 +69,6 @@ class _MyAppState extends State<MyApp> {
               "高": "${candle.high?.toStringAsFixed(2)}",
               "低": "${candle.low?.toStringAsFixed(2)}",
             },
-            timeLabel: (timestamp, count) => "<Date>",
             priceLabel: (price) => "${price.round()} 💎",
           ),
         ),

example/lib/mock_data.dart

@@ -1114,7 +1114,7 @@ class MockDataTesla {
 
   static List<CandleData> get candles => _rawData
       .map((row) => CandleData(
-            timestamp: row[0],
+            timestamp: row[0] * 1000,
             open: row[1]?.toDouble(),
             high: row[2]?.toDouble(),
             low: row[3]?.toDouble(),

lib/src/interactive_chart.dart

@@ -247,7 +247,7 @@ class _InteractiveChartState extends State<InteractiveChart> {
   }
 
   String defaultTimeLabel(int timestamp, int visibleDataCount) {
-    final date = DateTime.fromMillisecondsSinceEpoch(timestamp * 1000)
+    final date = DateTime.fromMillisecondsSinceEpoch(timestamp)
         .toIso8601String()
         .split("T")
         .first
@@ -266,7 +266,7 @@ class _InteractiveChartState extends State<InteractiveChart> {
 
   Map<String, String> defaultOverlayInfo(CandleData candle) {
     final date = intl.DateFormat.yMMMd()
-        .format(DateTime.fromMillisecondsSinceEpoch(candle.timestamp * 1000));
+        .format(DateTime.fromMillisecondsSinceEpoch(candle.timestamp));
     return {
       "Date": date,
       "Open": candle.open?.toStringAsFixed(2) ?? "-",