Hotfix/touch response null

CHANGELOG.md

@@ -1,3 +1,6 @@
+## 0.2.1
+* fixed #64, added a technichal debt :(
+
 ## 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

README.md

@@ -36,7 +36,7 @@ Thank you all!
 
 ```kotlin
 dependencies:
-  fl_chart: ^0.2.0
+  fl_chart: ^0.2.1
 ```
 
 

example/ios/Flutter/flutter_export_environment.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+# This is a generated file; do not edit or check into version control.
+export "FLUTTER_ROOT=/Users/iman/Dev/flutter"
+export "FLUTTER_APPLICATION_PATH=/Users/iman/IdeaProjects/fl_chart/example"
+export "FLUTTER_TARGET=/Users/iman/IdeaProjects/fl_chart/example/lib/main.dart"
+export "FLUTTER_BUILD_DIR=build"
+export "SYMROOT=${SOURCE_ROOT}/../build/ios"
+export "FLUTTER_FRAMEWORK_DIR=/Users/iman/Dev/flutter/bin/cache/artifacts/engine/ios"
+export "FLUTTER_BUILD_NAME=1.0.0"
+export "FLUTTER_BUILD_NUMBER=1"
+export "TRACK_WIDGET_CREATION=true"

example/ios/Runner.xcodeproj/project.pbxproj

@@ -8,7 +8,6 @@
 
 /* Begin PBXBuildFile section */
 		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
-		2D5378261FAA1A9400D5DBA9 /* flutter_assets in Resources */ = {isa = PBXBuildFile; fileRef = 2D5378251FAA1A9400D5DBA9 /* flutter_assets */; };
 		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
 		3B80C3941E831B6300D905FE /* App.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 3B80C3931E831B6300D905FE /* App.framework */; };
 		3B80C3951E831B6300D905FE /* App.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 3B80C3931E831B6300D905FE /* App.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
@@ -40,7 +39,6 @@
 /* Begin PBXFileReference section */
 		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
 		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
-		2D5378251FAA1A9400D5DBA9 /* flutter_assets */ = {isa = PBXFileReference; lastKnownFileType = folder; name = flutter_assets; path = Flutter/flutter_assets; sourceTree = SOURCE_ROOT; };
 		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
 		3B80C3931E831B6300D905FE /* App.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = App.framework; path = Flutter/App.framework; sourceTree = "<group>"; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
@@ -73,7 +71,6 @@
 		9740EEB11CF90186004384FC /* Flutter */ = {
 			isa = PBXGroup;
 			children = (
-				2D5378251FAA1A9400D5DBA9 /* flutter_assets */,
 				3B80C3931E831B6300D905FE /* App.framework */,
 				3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */,
 				9740EEBA1CF902C7004384FC /* Flutter.framework */,
@@ -190,7 +187,6 @@
 				3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */,
 				9740EEB41CF90195004384FC /* Debug.xcconfig in Resources */,
 				97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */,
-				2D5378261FAA1A9400D5DBA9 /* flutter_assets in Resources */,
 				97C146FC1CF9000F007C117D /* Main.storyboard in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

fl_chart.iml

@@ -9,6 +9,7 @@
       <excludeFolder url="file://$MODULE_DIR$/example/.dart_tool" />
       <excludeFolder url="file://$MODULE_DIR$/example/.pub" />
       <excludeFolder url="file://$MODULE_DIR$/example/build" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/Flutter/App.framework/flutter_assets/packages" />
     </content>
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" name="Dart SDK" level="project" />

lib/fl_chart.dart

@@ -57,17 +57,20 @@ class _FlChartState extends State<FlChart> {
       onLongPressStart: (d) {
         _touchInputNotifier.value = FlLongPressStart(d.localPosition);
       },
-      onLongPressEnd: (d) {
+      onLongPressEnd: (d) async {
         _touchInputNotifier.value = FlLongPressEnd(d.localPosition);
+        _releaseTouch();
       },
       onLongPressMoveUpdate: (d) {
         _touchInputNotifier.value = FlLongPressMoveUpdate(d.localPosition);
       },
-      onPanCancel: () {
+      onPanCancel: () async {
         _touchInputNotifier.value = FlPanEnd(Offset.zero);
+        _releaseTouch();
       },
-      onPanEnd: (DragEndDetails details) {
+      onPanEnd: (DragEndDetails details) async {
         _touchInputNotifier.value = FlPanEnd(Offset.zero);
+        _releaseTouch();
       },
       onPanDown: (DragDownDetails details) {
         _touchInputNotifier.value = FlPanStart(details.localPosition);
@@ -84,6 +87,18 @@ class _FlChartState extends State<FlChart> {
     );
   }
 
+  void _releaseTouch() {
+    // bugFix to this issue: https://github.com/imaNNeoFighT/fl_chart/issues/64
+    // the problem is that wen user touches on screen we notify the touch result
+    // via touchResponseSink, and the listener tries to change the state of chart,
+    // then the chart again puts the new touchResult inside the touchResponseSink,
+    // and it got stuck in a loop, now we pass a NonTouch to break the loop
+    // Todo: we should find a better way to handle it
+    Future<dynamic>.delayed(Duration(milliseconds: 100)).then((dynamic s) {
+      _touchInputNotifier.value = NonTouch();
+    });
+  }
+
   @override
   void dispose() {
     super.dispose();

lib/src/chart/bar_chart/bar_chart_painter.dart

@@ -46,7 +46,6 @@ class BarChartPainter extends AxisChartPainter {
         touchInputNotifier.value != null &&
         !(touchInputNotifier.value is NonTouch)) {
       touchedResponseSink.add(BarTouchResponse(touchedSpot, touchInputNotifier.value));
-      releaseIfEndTouch();
     }
   }
 

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

@@ -117,16 +117,4 @@ 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/line_chart/line_chart_painter.dart

@@ -104,7 +104,6 @@ class LineChartPainter extends AxisChartPainter {
         touchInputNotifier.value != null &&
         !(touchInputNotifier.value.runtimeType is NonTouch)) {
       touchedResponseSink.add(LineTouchResponse(touchedSpots, touchInputNotifier.value));
-      releaseIfEndTouch();
     }
   }
 

lib/src/chart/pie_chart/pie_chart_painter.dart

@@ -57,7 +57,6 @@ class PieChartPainter extends BaseChartPainter {
       && 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: 0.2.0
+version: 0.2.1
 author: Iman Khoshabi <[email protected]>
 homepage: https://github.com/imaNNeoFighT/fl_chart