Merge pull request #60 from imaNNeoFighT/bugfix/loop

Bugfix/loop

Author: imaNNeo

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.2.0
+* fixed a critical got stuck in draw loop bug,
+* set `BarChartGroupData` x as required property to keep consistency and prevent unpredictable bugs
+
 ## 0.1.6
 * added `enableNormalTouch` property to chart's TouchData to handle normal taps, and enabled by default.
 

README.md

@@ -36,7 +36,7 @@ Thank you all!
 
 ```kotlin
 dependencies:
-  fl_chart: ^0.1.6
+  fl_chart: ^0.2.0
 ```
 
 

example/lib/line_chart/samples/line_chart_sample1.dart

@@ -20,9 +20,7 @@ class LineChartSample1State extends State<LineChartSample1> {
     super.initState();
 
     controller = StreamController();
-    controller.stream.distinct().listen((LineTouchResponse response){
-      print('response: ${response.touchInput}');
-    });
+    controller.stream.distinct().listen((LineTouchResponse response){});
   }
 
   @override

lib/src/chart/bar_chart/bar_chart_data.dart

@@ -129,10 +129,10 @@ class BarChartGroupData {
   /// to draw them independently by y value together.
   /// [barsSpace] is the space between the bar lines inside group
   const BarChartGroupData({
-    this.x,
+    @required this.x,
     this.barRods = const [],
     this.barsSpace = 2,
-  });
+  }): assert(x != null);
 
   /// calculates the whole width of our group,
   /// by adding all rod's width and group space * rods count.

lib/src/chart/bar_chart/bar_chart_painter.dart

@@ -38,10 +38,15 @@ class BarChartPainter extends AxisChartPainter {
     drawBars(canvas, size, groupBarsPosition);
     drawTitles(canvas, size, groupBarsPosition);
 
-    super.drawTouchTooltip(canvas, size, data.barTouchData.touchTooltipData, [touchedSpot]);
+    if (touchedSpot != null) {
+      super.drawTouchTooltip(canvas, size, data.barTouchData.touchTooltipData, [touchedSpot]);
+    }
 
-    if (touchedResponseSink != null) {
+    if (touchedResponseSink != null && touchInputNotifier != null
+      && touchInputNotifier.value != null
+      && !(touchInputNotifier.value is NonTouch)) {
       touchedResponseSink.add(BarTouchResponse(touchedSpot, touchInputNotifier.value));
+      releaseIfEndTouch();
     }
   }
 
@@ -342,6 +347,7 @@ class BarChartPainter extends AxisChartPainter {
       return null;
     }
 
+
     final touch = touchInputNotifier.value;
 
     if (touch.getOffset() == null) {
@@ -389,7 +395,7 @@ class BarChartPainter extends AxisChartPainter {
       }
     }
 
-    return BarTouchedSpot(null, null, null, null);
+    return null;
   }
 
   @override

lib/src/chart/base/base_chart/base_chart_painter.dart

@@ -104,7 +104,9 @@ abstract class BaseChartPainter<D extends BaseChartData> extends CustomPainter {
   /// checks that the touchInput is eligible to draw,
   /// and child painters can use this function to check then draw their default touch behaviors.
   bool shouldDrawTouch() {
-    if (touchInputNotifier == null || shouldDrawTouch == null) {
+    if (touchInputNotifier == null
+      || touchInputNotifier.value == null
+      || shouldDrawTouch == null) {
       return false;
     }
 
@@ -118,4 +120,16 @@ abstract class BaseChartPainter<D extends BaseChartData> extends CustomPainter {
 
     return true;
   }
+
+  /// if the event was ended, we should release our touchInputNotifier
+  void releaseIfEndTouch() {
+    if (touchInputNotifier == null) {
+      return;
+    }
+    if (touchInputNotifier.value == null
+      || touchInputNotifier.value is FlLongPressEnd
+      || touchInputNotifier.value is FlPanEnd) {
+      touchInputNotifier.value = NonTouch();
+    }
+  }
 }

lib/src/chart/base/base_chart/touch_input.dart

@@ -90,4 +90,12 @@ class FlPanEnd extends FlTouchNormapInput {
     return localPosition;
   }
 
+}
+
+
+class NonTouch extends FlTouchInput {
+  @override
+  Offset getOffset() {
+    return null;
+  }
 }

lib/src/chart/line_chart/line_chart_painter.dart

@@ -97,8 +97,11 @@ class LineChartPainter extends AxisChartPainter {
     // Draw touch tooltip on most top spot
     super.drawTouchTooltip(canvas, viewSize, data.lineTouchData.touchTooltipData, touchedSpots);
 
-    if (touchedResponseSink != null) {
+    if (touchedResponseSink != null && touchInputNotifier != null
+      && touchInputNotifier.value != null
+      && !(touchInputNotifier.value.runtimeType is NonTouch)) {
       touchedResponseSink.add(LineTouchResponse(touchedSpots, touchInputNotifier.value));
+      releaseIfEndTouch();
     }
   }
 

lib/src/chart/pie_chart/pie_chart_painter.dart

@@ -53,8 +53,11 @@ class PieChartPainter extends BaseChartPainter {
     drawTexts(canvas, size);
 
     final touched = _getTouchedDetails(canvas, size, sectionsAngle);
-    if (touchedResponseSink != null) {
+    if (touchedResponseSink != null && touchInputNotifier != null
+      && touchInputNotifier.value != null
+      && !(touchInputNotifier.value.runtimeType is NonTouch)) {
       touchedResponseSink.add(touched);
+      releaseIfEndTouch();
     }
   }
 

pubspec.yaml

@@ -1,6 +1,6 @@
 name: fl_chart
 description: A powerful Flutter chart library, currently supporting Line Chart, Bar Chart and Pie Chart.
-version: 0.1.6
+version: 0.2.0
 author: Iman Khoshabi <[email protected]>
 homepage: https://github.com/imaNNeoFighT/fl_chart