Add collapse button to the address book (#357)

* Added collapsible list to the Address Book

* fix text style

lib/src/screens/contact/contact_list_page.dart

@@ -12,7 +12,7 @@ import 'package:cw_core/crypto_currency.dart';
 import 'package:cake_wallet/src/screens/base_page.dart';
 import 'package:cake_wallet/src/widgets/alert_with_two_actions.dart';
 import 'package:cake_wallet/view_model/contact_list/contact_list_view_model.dart';
-import 'package:cake_wallet/src/widgets/standard_list.dart';
+import 'package:cake_wallet/src/widgets/collapsible_standart_list.dart';
 
 class ContactListPage extends BasePage {
   ContactListPage(this.contactListViewModel, {this.isEditable = true});
@@ -62,9 +62,12 @@ class ContactListPage extends BasePage {
         padding: EdgeInsets.only(top: 20.0, bottom: 20.0),
         child: Observer(
           builder: (_) {
-            return SectionStandardList(
+            return CollapsibleSectionList(
               context: context,
               sectionCount: 2,
+              themeColor: Theme.of(context).primaryTextTheme.title.color,
+              dividerThemeColor:
+              Theme.of(context).primaryTextTheme.caption.decorationColor,
               sectionTitleBuilder: (_, int sectionIndex) {
                 var title = 'Contacts';
 
@@ -73,7 +76,7 @@ class ContactListPage extends BasePage {
                 }
 
                 return Container(
-                    padding: EdgeInsets.only(left: 24, bottom: 20),
+                    padding: EdgeInsets.only(bottom: 10),
                     child: Text(title, style: TextStyle(fontSize: 36)));
               },
               itemCounter: (int sectionIndex) => sectionIndex == 0
@@ -144,11 +147,10 @@ class ContactListPage extends BasePage {
       child: Container(
         color: Colors.transparent,
         padding:
-            const EdgeInsets.only(left: 24, top: 16, bottom: 16, right: 24),
+            const EdgeInsets.only(top: 16, bottom: 16, right: 24),
         child: Row(
           mainAxisSize: MainAxisSize.min,
           mainAxisAlignment: MainAxisAlignment.start,
-          crossAxisAlignment: CrossAxisAlignment.center,
           children: <Widget>[
             image ?? Offstage(),
             Expanded(

lib/src/widgets/collapsible_standart_list.dart

@@ -0,0 +1,92 @@
+import 'package:cake_wallet/src/widgets/standard_list.dart';
+import 'package:flutter/material.dart';
+
+class CollapsibleSectionList extends SectionStandardList {
+  CollapsibleSectionList(
+      {bool hasTopSeparator,
+        BuildContext context,
+        int sectionCount,
+        int Function(int sectionIndex) itemCounter,
+        Widget Function(BuildContext context, int sectionIndex, int itemIndex)
+        itemBuilder,
+        Widget Function(BuildContext context, int sectionIndex)
+        sectionTitleBuilder,
+        Color themeColor,
+        Color dividerThemeColor})
+      : super(
+      hasTopSeparator: hasTopSeparator,
+      sectionCount: sectionCount,
+      itemCounter: itemCounter,
+      itemBuilder: itemBuilder,
+      sectionTitleBuilder: sectionTitleBuilder,
+      themeColor: themeColor,
+      dividerThemeColor: dividerThemeColor);
+
+  @override
+  List<Widget> transform(
+      bool hasTopSeparator,
+      BuildContext context,
+      int sectionCount,
+      int Function(int sectionIndex) itemCounter,
+      Widget Function(BuildContext context, int sectionIndex, int itemIndex)
+      itemBuilder,
+      Widget Function(BuildContext context, int sectionIndex)
+      sectionTitleBuilder,
+      themeColor,
+      dividerThemeColor) {
+    final items = <Widget>[];
+
+    for (var sectionIndex = 0; sectionIndex < sectionCount; sectionIndex++) {
+      final itemCount = itemCounter(sectionIndex);
+
+      items.add(Theme(
+        data: ThemeData(
+            textTheme: TextTheme(subtitle1: TextStyle(color: themeColor,fontFamily: 'Lato')),
+            backgroundColor: dividerThemeColor,
+            unselectedWidgetColor: themeColor,
+            accentColor: themeColor)
+            .copyWith(dividerColor: Colors.transparent),
+        child: Padding(
+          padding: const EdgeInsets.only(left: 24.0),
+          child: ListTileTheme(
+            contentPadding: EdgeInsets.only(right: 16,top:sectionIndex>0?26:0),
+            child: ExpansionTile(
+              title: sectionTitleBuilder == null
+                  ? Container()
+                  : Container(child: buildTitle(items, sectionIndex, context)),
+              initiallyExpanded: true,
+              children: buildSection(itemCount, items, sectionIndex, context),
+            ),
+          ),
+        ),
+      ));
+
+    }
+
+    items.add(StandardListSeparator(padding: EdgeInsets.only(left: 24)));
+    return items;
+  }
+
+  @override
+  Widget buildTitle(
+      List<Widget> items, int sectionIndex, BuildContext context) {
+    final title = sectionTitleBuilder(context, sectionIndex);
+    return title;
+  }
+
+  @override
+  List<Widget> buildSection(int itemCount, List<Widget> items, int sectionIndex,
+      BuildContext context) {
+    final List<Widget> section = [];
+
+    for (var itemIndex = 0; itemIndex < itemCount; itemIndex++) {
+      final item = itemBuilder(context, sectionIndex, itemIndex);
+
+      section.add(StandardListSeparator());
+
+      section.add(item);
+
+    }
+    return section;
+  }
+}

lib/src/widgets/standard_list.dart

@@ -120,9 +120,20 @@ class SectionStandardList extends StatelessWidget {
       @required this.sectionCount,
       this.sectionTitleBuilder,
       this.hasTopSeparator = false,
+      this.themeColor,
+      this.dividerThemeColor,
       BuildContext context})
-      : totalRows = transform(hasTopSeparator, context, sectionCount,
+      : totalRows = [] {
-            itemCounter, itemBuilder, sectionTitleBuilder);
+    totalRows.addAll(transform(
+        hasTopSeparator,
+        context,
+        sectionCount,
+        itemCounter,
+        itemBuilder,
+        sectionTitleBuilder,
+        themeColor,
+        dividerThemeColor));
+  }
 
   final int sectionCount;
   final bool hasTopSeparator;
@@ -132,8 +143,10 @@ class SectionStandardList extends StatelessWidget {
   final Widget Function(BuildContext context, int sectionIndex)
       sectionTitleBuilder;
   final List<Widget> totalRows;
+  final Color themeColor;
+  final Color dividerThemeColor;
 
-  static List<Widget> transform(
+  List<Widget> transform(
       bool hasTopSeparator,
       BuildContext context,
       int sectionCount,
@@ -141,7 +154,9 @@ class SectionStandardList extends StatelessWidget {
       Widget Function(BuildContext context, int sectionIndex, int itemIndex)
           itemBuilder,
       Widget Function(BuildContext context, int sectionIndex)
-          sectionTitleBuilder) {
+          sectionTitleBuilder,
+      Color themeColor,
+      Color dividerThemeColor) {
     final items = <Widget>[];
 
     for (var sectionIndex = 0; sectionIndex < sectionCount; sectionIndex++) {
@@ -150,16 +165,12 @@ class SectionStandardList extends StatelessWidget {
       }
 
       if (sectionTitleBuilder != null) {
-        items.add(sectionTitleBuilder(context, sectionIndex));
+        items.add(buildTitle(items, sectionIndex, context));
       }
 
       final itemCount = itemCounter(sectionIndex);
 
-      for (var itemIndex = 0; itemIndex < itemCount; itemIndex++) {
+      items.addAll(buildSection(itemCount, items, sectionIndex, context));
-        final item = itemBuilder(context, sectionIndex, itemIndex);
-
-        items.add(item);
-      }
 
       items.add(sectionIndex + 1 != sectionCount
           ? SectionHeaderListRow()
@@ -169,6 +180,24 @@ class SectionStandardList extends StatelessWidget {
     return items;
   }
 
+  Widget buildTitle(
+      List<Widget> items, int sectionIndex, BuildContext context) {
+    final title = sectionTitleBuilder(context, sectionIndex);
+    return title;
+  }
+
+  List<Widget> buildSection(int itemCount, List<Widget> items, int sectionIndex,
+      BuildContext context) {
+    final List<Widget> section = [];
+
+    for (var itemIndex = 0; itemIndex < itemCount; itemIndex++) {
+      final item = itemBuilder(context, sectionIndex, itemIndex);
+
+      section.add(item);
+    }
+    return section;
+  }
+
   @override
   Widget build(BuildContext context) {
     return ListView.separated(