Added attribute maxChip to limit number of chips

Author: danvick

.idea/libraries/Dart_Packages.xml

@@ -7,15 +7,22 @@ Flutter library for building input fields with InputChips as input options.
 ### Installation
 Follow installation instructions [here](https://pub.dartlang.org/packages/flutter_chips_input#-installing-tab-)
 
-### Example
+### Import
+```dart
+import 'package:flutter_chips_input/flutter_chips_input.dart';
 ```
+
+### Example
+#### ChipsInput
+```dart
 ChipsInput(
     initialValue: [
         AppProfile('John Doe', '[email protected]', 'https://d2gg9evh47fn9z.cloudfront.net/800px_COLOURBOX4057996.jpg')
     ],
     decoration: InputDecoration(
         labelText: "Select People",
     ),
+    maxChips: 3,
     findSuggestions: (String query) {
         if (query.length != 0) {
             var lowercaseQuery = query.toLowerCase();

.idea/workspace.xml

@@ -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;

README.md

@@ -67,7 +67,8 @@ class _MyHomePageState extends State<MyHomePage> {
                 AppProfile('John Doe', '[email protected]',
                     'https://d2gg9evh47fn9z.cloudfront.net/800px_COLOURBOX4057996.jpg'),
               ],
-              enabled: false,
+              enabled: true,
+              maxChips: 2,
               decoration: InputDecoration(
                 // prefixIcon: Icon(Icons.search),
                 // hintText: formControl.hint,

example/android/app/src/debug/assets/flutter_shared/icudtl.dat

@@ -9,7 +9,7 @@ typedef ChipsBuilder<T> = Widget Function(
     BuildContext context, ChipsInputState<T> state, T data);
 
 class ChipsInput<T> extends StatefulWidget {
-  const ChipsInput({
+  ChipsInput({
     Key key,
     this.initialValue = const [],
     this.decoration = const InputDecoration(),
@@ -19,7 +19,9 @@ class ChipsInput<T> extends StatefulWidget {
     @required this.findSuggestions,
     @required this.onChanged,
     this.onChipTapped,
-  }) : super(key: key);
+    this.maxChips,
+  }) : assert(maxChips == null || initialValue.length <= maxChips),
+        super(key: key);
 
   final InputDecoration decoration;
   final bool enabled;
@@ -29,6 +31,7 @@ class ChipsInput<T> extends StatefulWidget {
   final ChipsBuilder<T> chipBuilder;
   final ChipsBuilder<T> suggestionBuilder;
   final List<T> initialValue;
+  final int maxChips;
 
   @override
   ChipsInputState<T> createState() => ChipsInputState<T>();
@@ -62,19 +65,29 @@ class ChipsInputState<T> extends State<ChipsInput<T>>
     _initFocusNode();
     this._suggestionsBoxController = _SuggestionsBoxController(context);
     this._suggestionsStreamController = StreamController<List<T>>.broadcast();
-
-    (() async {
-      await this._initOverlayEntry();
-      this._focusNode.addListener(_onFocusChanged);
-      // in case we already missed the focus event
-      if (this._focusNode.hasFocus) {
-        this._suggestionsBoxController.open();
-      }
-    })();
   }
 
   _initFocusNode() {
-    this._focusNode = widget.enabled ? FocusNode() : AlwaysDisabledFocusNode();
+    setState(() {
+      debugPrint("Initializing focus node");
+      if (widget.enabled) {
+        if (widget.maxChips == null || _chips.length < widget.maxChips){
+          this._focusNode = FocusNode();
+          (() async {
+            await this._initOverlayEntry();
+            this._focusNode.addListener(_onFocusChanged);
+            // in case we already missed the focus event
+            if (this._focusNode.hasFocus) {
+              this._suggestionsBoxController.open();
+            }
+          })();
+        }
+        else
+          this._focusNode = AlwaysDisabledFocusNode();
+      } else
+        this._focusNode = AlwaysDisabledFocusNode();
+    });
+    debugPrint(this._focusNode.toString());
   }
 
   void _onFocusChanged() {
@@ -160,6 +173,7 @@ class ChipsInputState<T> extends State<ChipsInput<T>>
   void selectSuggestion(T data) {
     setState(() {
       _chips.add(data);
+      if (widget.maxChips != null) _initFocusNode();
       _updateTextInputState();
       _suggestions = null;
       _suggestionsStreamController.add(_suggestions);
@@ -173,6 +187,7 @@ class ChipsInputState<T> extends State<ChipsInput<T>>
         _chips.remove(data);
         _updateTextInputState();
       });
+      if (widget.maxChips != null) _initFocusNode();
       widget.onChanged(_chips.toList(growable: false));
     }
   }

example/ios/Runner.xcodeproj/project.pbxproj

@@ -60,6 +60,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.6.2"
+  pedantic:
+    dependency: transitive
+    description:
+      name: pedantic
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.4.0"
   quiver:
     dependency: transitive
     description:
@@ -78,7 +85,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.4.1"
+    version: "1.5.3"
   stack_trace:
     dependency: transitive
     description:
@@ -106,14 +113,14 @@ packages:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "1.1.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.1"
+    version: "0.2.2"
   typed_data:
     dependency: transitive
     description:
@@ -129,4 +136,4 @@ packages:
     source: hosted
     version: "2.0.8"
 sdks:
-  dart: ">=2.0.0 <3.0.0"
+  dart: ">=2.1.0 <3.0.0"