Cw 09 implement picker screen with ability to search (#250)

* Added new picker screen with search bar and currency icons

lib/src/screens/exchange/exchange_page.dart

@@ -206,8 +206,8 @@ class ExchangePage extends BasePage {
                                 onCurrencySelected: (currency) {
                                   // FIXME: need to move it into view model
                                   if (currency == CryptoCurrency.xmr &&
-                                      exchangeViewModel.wallet.type ==
+                                      exchangeViewModel.wallet.type !=
-                                          WalletType.bitcoin) {
+                                          WalletType.monero) {
                                     showPopUp<void>(
                                         context: context,
                                         builder: (dialogContext) {

lib/src/screens/exchange/widgets/currency_picker.dart

@@ -1,176 +1,210 @@
 import 'dart:ui';
+import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/palette.dart';
+import 'package:cake_wallet/src/screens/exchange/widgets/currency_utils.dart';
+import 'package:cake_wallet/src/screens/exchange/widgets/picker_item.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:cw_core/crypto_currency.dart';
 import 'package:cake_wallet/src/widgets/alert_background.dart';
-import 'package:cake_wallet/src/widgets/alert_close_button.dart';
+import 'currency_picker_widget.dart';
-import 'package:cake_wallet/src/widgets/cake_scrollbar.dart';
 
 class CurrencyPicker extends StatefulWidget {
-  CurrencyPicker({
+  CurrencyPicker(
-    @required this.selectedAtIndex,
+      {@required this.selectedAtIndex,
-    @required this.items,
+      @required this.items,
-    @required this.title,
+      @required this.title,
-    @required this.onItemSelected,
+      @required this.onItemSelected,
-  });
+      this.isMoneroWallet = false,
+      this.isConvertFrom = false});
 
-  final int selectedAtIndex;
+  int selectedAtIndex;
   final List<CryptoCurrency> items;
   final String title;
   final Function(CryptoCurrency) onItemSelected;
+  final bool isMoneroWallet;
+  final bool isConvertFrom;
 
   @override
-  CurrencyPickerState createState() => CurrencyPickerState(
+  CurrencyPickerState createState() => CurrencyPickerState(items);
-    selectedAtIndex,
-    items,
-    title,
-    onItemSelected
-  );
 }
 
 class CurrencyPickerState extends State<CurrencyPicker> {
-  CurrencyPickerState(
+  CurrencyPickerState(this.items)
-      this.selectedAtIndex,
+      : isSearchBarActive = false,
-      this.items,
+        textFieldValue = '',
-      this.title,
+        subPickerItemsList = [],
-      this.onItemSelected): itemsCount = items.length;
+        appBarTextStyle = TextStyle(
+            fontSize: 20,
+            fontFamily: 'Lato',
+            backgroundColor: Colors.transparent,
+            color: Colors.white);
 
-  final int selectedAtIndex;
+  @override
-  final List<CryptoCurrency> items;
+  void initState() {
-  final String title;
+    pickerItemsList = CryptoCurrency.all
-  final Function(CryptoCurrency) onItemSelected;
+        .map((CryptoCurrency cur) => PickerItem<CryptoCurrency>(cur,
+            title: CurrencyUtils.titleForCurrency(cur),
+            iconPath: CurrencyUtils.iconPathForCurrency(cur),
+            tag: CurrencyUtils.tagForCurrency(cur),
+            description: CurrencyUtils.descriptionForCurrency(cur)))
+        .toList();
+    cleanSubPickerItemsList();
+    super.initState();
+  }
 
-  final closeButton = Image.asset('assets/images/close.png',
+  List<PickerItem<CryptoCurrency>> pickerItemsList;
-    color: Palette.darkBlueCraiola,
+  List<CryptoCurrency> items;
-  );
+  bool isSearchBarActive;
-  final int crossAxisCount = 3;
+  String textFieldValue;
-  final int maxNumberItemsInAlert = 12;
+  List<PickerItem<CryptoCurrency>> subPickerItemsList;
-  final int itemsCount;
+  TextStyle appBarTextStyle;
-  final double backgroundHeight = 280;
+
-  final double thumbHeight = 72;
+  void cleanSubPickerItemsList() {
-  ScrollController controller = ScrollController();
+    subPickerItemsList = pickerItemsList
-  double fromTop = 0;
+        .where((element) => items.contains(element.original))
+        .toList();
+  }
+
+  void currencySearchBySubstring(
+      String subString, List<PickerItem<CryptoCurrency>> list) {
+    setState(() {
+      if (subString.isNotEmpty) {
+        subPickerItemsList = subPickerItemsList
+            .where((element) =>
+                element.title.contains(subString.toUpperCase()) ||
+                element.description.contains(subString.toLowerCase()))
+            .toList();
+      } else {
+        cleanSubPickerItemsList();
+      }
+    });
+  }
 
   @override
   Widget build(BuildContext context) {
-    controller.addListener(() {
-      fromTop = controller.hasClients
-          ? (controller.offset / controller.position.maxScrollExtent * (backgroundHeight - thumbHeight))
-          : 0;
-      setState(() {});
-    });
-
     return AlertBackground(
-        child: Stack(
+      child: SafeArea(
-          alignment: Alignment.center,
+        child: Scaffold(
-          children: <Widget>[
+          resizeToAvoidBottomInset: false,
-            Column(
+          backgroundColor: Colors.transparent,
-              mainAxisSize: MainAxisSize.min,
+          body: Column(
-              children: <Widget>[
+            children: [
-                Container(
+              Padding(
-                  padding: EdgeInsets.only(left: 24, right: 24),
+                padding: EdgeInsets.symmetric(horizontal: 26.0, vertical: 0),
-                  child: Text(
+                child: Row(
-                    title,
+                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                    textAlign: TextAlign.center,
+                    children: [
-                    style: TextStyle(
+                      isSearchBarActive
-                        fontSize: 18,
+                          ? Expanded(
-                        fontFamily: 'Lato',
+                              child: Row(
-                        fontWeight: FontWeight.bold,
+                                mainAxisAlignment:
-                        decoration: TextDecoration.none,
+                                    MainAxisAlignment.spaceBetween,
-                        color: Colors.white
+                                children: [
+                                  InkWell(
+                                      child: Text(
+                                        S.of(context).cancel,
+                                        style: appBarTextStyle,
+                                      ),
+                                      onTap: () {
+                                        setState(() {
+                                          isSearchBarActive = false;
+                                          textFieldValue = '';
+                                          cleanSubPickerItemsList();
+                                        });
+                                      }),
+                                  Container(
+                                    width: 100.0,
+                                    child: CupertinoTextField(
+                                        autofocus: true,
+                                        placeholder:
+                                            S.of(context).search + '...',
+                                        placeholderStyle: appBarTextStyle,
+                                        decoration: BoxDecoration(
+                                            color: Colors.transparent),
+                                        cursorColor: Colors.white,
+                                        cursorHeight: 23.0,
+                                        style: appBarTextStyle,
+                                        onChanged: (value) {
+                                          this.textFieldValue = value;
+                                          cleanSubPickerItemsList();
+                                          currencySearchBySubstring(
+                                              textFieldValue,
+                                              subPickerItemsList);
+                                        }),
+                                  )
+                                ],
+                              ),
+                            )
+                          : Text(
+                              widget.title,
+                              style: appBarTextStyle,
+                            ),
+                      IconButton(
+                        splashRadius: 23,
+                        icon: Icon(Icons.search, color: Colors.white),
+                        onPressed: () {
+                          setState(() {
+                            isSearchBarActive = true;
+                          });
+                        },
+                      )
+                    ]),
+              ),
+              Expanded(
+                flex: 12,
+                child: Padding(
+                  padding: const EdgeInsets.symmetric(
+                      horizontal: 26.0, vertical: 26.0),
+                  child: Container(
+                    child: CurrencyPickerWidget(
+                      crossAxisCount: 2,
+                      selectedAtIndex: widget.selectedAtIndex,
+                      itemsCount: subPickerItemsList.length,
+                      pickerItemsList: subPickerItemsList,
+                      pickListItem: (int index) {
+                        setState(() {
+                          widget.selectedAtIndex = index;
+                        });
+                        widget
+                            .onItemSelected(subPickerItemsList[index].original);
+                        if (widget.isConvertFrom &&
+                            !widget.isMoneroWallet &&
+                            (subPickerItemsList[index].original ==
+                                CryptoCurrency.xmr)) {
+                        } else {
+                          Navigator.of(context).pop();
+                        }
+                      },
                     ),
                   ),
                 ),
-                Padding(
+              ),
-                  padding: EdgeInsets.only(top: 24),
+              Expanded(
-                  child: GestureDetector(
+                flex: 2,
-                    onTap: () => null,
+                child: Container(
-                    child: ClipRRect(
+                  width: 42.0,
-                      borderRadius: BorderRadius.all(Radius.circular(14)),
+                  alignment: Alignment.topCenter,
-                      child: Container(
+                  child: FittedBox(
-                          height: 320,
+                    child: FloatingActionButton(
-                          width: 300,
+                      elevation: 0,
-                          color: Theme.of(context).accentTextTheme.title.backgroundColor,
+                      backgroundColor: Colors.white,
-                          child: Stack(
+                      onPressed: () {
-                            alignment: Alignment.center,
+                        Navigator.of(context).pop();
-                            children: <Widget>[
+                      },
-                              GridView.count(
+                      child: Icon(
-                                padding: EdgeInsets.all(0),
+                        Icons.close_outlined,
-                                  controller: controller,
+                        color: Palette.darkBlueCraiola,
-                                  crossAxisCount: crossAxisCount,
+                        size: 30.0,
-                                  childAspectRatio: 1.25,
-                                  crossAxisSpacing: 1,
-                                  mainAxisSpacing: 1,
-                                  children: List.generate(
-                                      itemsCount
-                                          + getExtraEmptyTilesCount(crossAxisCount, itemsCount),
-                                          (index) {
-
-                                        if (index >= itemsCount) {
-                                          return Container(
-                                            color: Theme.of(context).accentTextTheme.title.color,
-                                          );
-                                        }
-
-                                        final item = items[index];
-                                        final isItemSelected = index == selectedAtIndex;
-
-                                        final color = isItemSelected
-                                            ? Theme.of(context).textTheme.body2.color
-                                            : Theme.of(context).accentTextTheme.title.color;
-                                        final textColor = isItemSelected
-                                            ? Palette.blueCraiola
-                                            : Theme.of(context).primaryTextTheme.title.color;
-
-                                        return GestureDetector(
-                                          onTap: () {
-                                            if (onItemSelected == null) {
-                                              return;
-                                            }
-                                            Navigator.of(context).pop();
-                                            onItemSelected(item);
-                                          },
-                                          child: Container(
-                                            color: color,
-                                            child: Center(
-                                              child: Text(
-                                                item.toString(),
-                                                style: TextStyle(
-                                                    fontSize: 15,
-                                                    fontFamily: 'Lato',
-                                                    fontWeight: FontWeight.w600,
-                                                    decoration: TextDecoration.none,
-                                                    color: textColor
-                                                ),
-                                              ),
-                                            ),
-                                          ),
-                                        );
-                                      })
-                              ),
-                              if (itemsCount > maxNumberItemsInAlert)
-                              CakeScrollbar(
-                                  backgroundHeight: backgroundHeight,
-                                  thumbHeight: thumbHeight,
-                                  fromTop: fromTop
-                              )
-                            ],
-                          )
                       ),
                     ),
                   ),
-                )
+                ),
-              ],
+              ),
-            ),
+            ],
-            AlertCloseButton(image: closeButton)
+          ),
-          ],
+        ),
-        )
+      ),
     );
   }
-
-  int getExtraEmptyTilesCount(int crossAxisCount, int itemsCount) {
-    final int tilesInNewRowCount = itemsCount % crossAxisCount;
-    return tilesInNewRowCount == 0 ? 0 : crossAxisCount - tilesInNewRowCount;
-  }
 }

lib/src/screens/exchange/widgets/currency_picker_item_widget.dart

@@ -0,0 +1,93 @@
+import 'package:flutter/material.dart';
+import 'package:cake_wallet/palette.dart';
+
+class PickerItemWidget extends StatelessWidget {
+  const PickerItemWidget(
+      {this.iconPath, this.title, this.isSelected, this.tag, this.onTap});
+
+  final String iconPath;
+  final String title;
+  final bool isSelected;
+  final String tag;
+  final void Function() onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: onTap,
+      child: Container(
+        color: isSelected
+            ? Theme.of(context).textTheme.bodyText1.color
+            : Theme.of(context).accentTextTheme.headline6.color,
+        child: Center(
+          child: Padding(
+            padding: const EdgeInsets.all(8.0),
+            child: Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                Expanded(
+                  child: Container(
+                    child: Image.asset(
+                      iconPath,
+                      height: 32.0,
+                      width: 32.0,
+                    ),
+                  ),
+                ),
+                Expanded(
+                  child: Stack(
+                    clipBehavior: Clip.none,
+                    alignment: Alignment.centerLeft,
+                    children: [
+                      Text(
+                        title,
+                        style: TextStyle(
+                          color: isSelected
+                              ? Palette.blueCraiola
+                              : Theme.of(context).primaryTextTheme.title.color,
+                          fontSize: 18.0,
+                          fontFamily: 'Lato',
+                        ),
+                      ),
+                      tag != null
+                          ? Positioned(
+                              top: -20.0,
+                              right: 7.0,
+                              child: Container(
+                                width: 35.0,
+                                height: 18.0,
+                                child: Center(
+                                  child: Text(
+                                    tag,
+                                    style: TextStyle(
+                                        fontSize: 7.0,
+                                        fontFamily: 'Lato',
+                                        color: Theme.of(context)
+                                            .textTheme
+                                            .body1
+                                            .color),
+                                  ),
+                                ),
+                                decoration: BoxDecoration(
+                                  borderRadius: BorderRadius.circular(6.0),
+                                  //border: Border.all(color: ),
+                                  color: Theme.of(context)
+                                      .textTheme
+                                      .body1
+                                      .decorationColor,
+                                ),
+                              ),
+                            )
+                          : Container(),
+                    ],
+                  ),
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+    ;
+  }
+}

lib/src/screens/exchange/widgets/currency_picker_widget.dart

@@ -0,0 +1,61 @@
+import 'package:flutter/material.dart';
+import 'package:cw_core/crypto_currency.dart';
+import 'picker_item.dart';
+import 'currency_picker_item_widget.dart';
+
+class CurrencyPickerWidget extends StatelessWidget {
+  const CurrencyPickerWidget({
+    @required this.crossAxisCount,
+    @required this.selectedAtIndex,
+    @required this.itemsCount,
+    @required this.pickerItemsList,
+    @required this.pickListItem,
+  });
+
+  final int crossAxisCount;
+  final int selectedAtIndex;
+  final int itemsCount;
+  final Function pickListItem;
+  final List<PickerItem<CryptoCurrency>> pickerItemsList;
+
+  @override
+  Widget build(BuildContext context) {
+    return LayoutBuilder(
+      builder: (BuildContext context, BoxConstraints constraints) {
+        return Container(
+          decoration: BoxDecoration(
+            color: Theme.of(context).accentTextTheme.headline6.backgroundColor,
+            borderRadius: BorderRadius.circular(14.0),
+          ),
+          child: ClipRRect(
+            borderRadius: BorderRadius.circular(14.0),
+            child: Scrollbar(
+              showTrackOnHover: true,
+              isAlwaysShown: true,
+              thickness: 6.0,
+              radius: Radius.circular(3),
+              child: GridView.builder(
+                  gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
+                      crossAxisCount: crossAxisCount,
+                      crossAxisSpacing: 1,
+                      mainAxisExtent: constraints.maxHeight / 8,
+                      mainAxisSpacing: 1),
+                  itemCount: pickerItemsList.length,
+                  itemBuilder: (BuildContext ctx, index) {
+                    return PickerItemWidget(
+                      onTap: () {
+                        pickListItem(index);
+                      },
+                      title: pickerItemsList[index].title,
+                      iconPath: pickerItemsList[index].iconPath,
+                      isSelected: index == selectedAtIndex,
+                      tag: pickerItemsList[index].tag,
+                    );
+                  }),
+            ),
+          ),
+        );
+      },
+    );
+  }
+}

lib/src/screens/exchange/widgets/currency_utils.dart

@@ -0,0 +1,99 @@
+import 'package:cw_core/crypto_currency.dart';
+
+class CurrencyUtils {
+  static String tagForCurrency(CryptoCurrency cur) {
+    switch (cur) {
+      case CryptoCurrency.bnb:
+        return 'BEP2';
+      case CryptoCurrency.dai:
+        return 'ETH';
+      case CryptoCurrency.usdt:
+        return 'OMNI';
+      case CryptoCurrency.usdterc20:
+        return 'ETH';
+      default:
+        return null;
+    }
+  }
+
+  static String iconPathForCurrency(CryptoCurrency cur) {
+    switch (cur) {
+      case CryptoCurrency.xmr:
+        return 'assets/images/monero_icon.png';
+      case CryptoCurrency.ada:
+        return 'assets/images/ada_icon.png';
+      case CryptoCurrency.bch:
+        return 'assets/images/bch_icon.png';
+      case CryptoCurrency.bnb:
+        return 'assets/images/bnb_icon.png';
+      case CryptoCurrency.btc:
+        return 'assets/images/btc.png';
+      case CryptoCurrency.dai:
+        return 'assets/images/dai_icon.png';
+      case CryptoCurrency.dash:
+        return 'assets/images/dash_icon.png';
+      case CryptoCurrency.eos:
+        return 'assets/images/eos_icon.png';
+      case CryptoCurrency.eth:
+        return 'assets/images/eth_icon.png';
+      case CryptoCurrency.ltc:
+        return 'assets/images/litecoin-ltc_icon.png';
+      case CryptoCurrency.trx:
+        return 'assets/images/trx_icon.png';
+      case CryptoCurrency.usdt:
+        return 'assets/images/usdt_icon.png';
+      case CryptoCurrency.usdterc20:
+        return 'assets/images/usdterc20_icon.png';
+      case CryptoCurrency.xlm:
+        return 'assets/images/xlm_icon.png';
+      case CryptoCurrency.xrp:
+        return 'assets/images/xrp_icon.png';
+      default:
+        return null;
+    }
+  }
+
+  static String titleForCurrency(CryptoCurrency cur) {
+    switch (cur) {
+      case CryptoCurrency.bnb:
+        return 'BNB';
+      case CryptoCurrency.usdterc20:
+        return 'USDT';
+      default:
+        return cur.title;
+    }
+  }
+
+  static String descriptionForCurrency(CryptoCurrency cur) {
+    switch (cur) {
+      case CryptoCurrency.xmr:
+        return 'monero';
+      case CryptoCurrency.ada:
+        return 'cardano';
+      case CryptoCurrency.bch:
+        return 'bitcoin cash';
+      case CryptoCurrency.bnb:
+        return 'binance bep2';
+      case CryptoCurrency.btc:
+        return 'bitcoin';
+      case CryptoCurrency.dai:
+        return 'dai eth';
+      case CryptoCurrency.eth:
+        return 'ethereum';
+      case CryptoCurrency.ltc:
+        return 'litecoin';
+      case CryptoCurrency.trx:
+        return 'tron';
+      case CryptoCurrency.usdt:
+        return 'usdt omni';
+      case CryptoCurrency.usdterc20:
+        return 'tether ERC20 eth';
+      case CryptoCurrency.xlm:
+        return 'lumens';
+      case CryptoCurrency.xrp:
+        return 'ripple';
+      default:
+        return cur.title;
+    }
+  }
+}

lib/src/screens/exchange/widgets/exchange_card.dart

@@ -306,126 +306,121 @@ class ExchangeCardState extends State<ExchangeCard> {
             ? Padding(
                 padding: EdgeInsets.only(top: 20),
                 child: AddressTextField(
-                  focusNode: widget.addressFocusNode,
+                    focusNode: widget.addressFocusNode,
-                  controller: addressController,
+                    controller: addressController,
-                  placeholder: widget.hasRefundAddress
+                    placeholder: widget.hasRefundAddress
-                      ? S.of(context).refund_address
+                        ? S.of(context).refund_address
-                      : null,
+                        : null,
-                  options: [
+                    options: [
-                    AddressTextFieldOption.paste,
+                      AddressTextFieldOption.paste,
-                    AddressTextFieldOption.qrCode,
+                      AddressTextFieldOption.qrCode,
-                    AddressTextFieldOption.addressBook,
+                      AddressTextFieldOption.addressBook,
-                  ],
+                    ],
-                  isBorderExist: false,
+                    isBorderExist: false,
-                  textStyle: TextStyle(
+                    textStyle: TextStyle(
-                      fontSize: 16,
+                        fontSize: 16,
-                      fontWeight: FontWeight.w600,
+                        fontWeight: FontWeight.w600,
-                      color: Colors.white),
+                        color: Colors.white),
-                  hintStyle: TextStyle(
+                    hintStyle: TextStyle(
-                      fontSize: 16,
+                        fontSize: 16,
-                      fontWeight: FontWeight.w600,
+                        fontWeight: FontWeight.w600,
-                      color: Theme.of(context)
+                        color: Theme.of(context)
-                          .accentTextTheme
+                            .accentTextTheme
-                          .display4
+                            .display4
-                          .decorationColor),
+                            .decorationColor),
-                  buttonColor: widget.addressButtonsColor,
+                    buttonColor: widget.addressButtonsColor,
-                  validator: widget.addressTextFieldValidator,
+                    validator: widget.addressTextFieldValidator,
-                  onPushPasteButton: widget.onPushPasteButton,
+                    onPushPasteButton: widget.onPushPasteButton,
-                  onPushAddressBookButton: widget.onPushAddressBookButton
+                    onPushAddressBookButton: widget.onPushAddressBookButton),
-                ),
               )
             : Padding(
                 padding: EdgeInsets.only(top: 10),
                 child: Builder(
-                    builder: (context) => Stack(
+                    builder: (context) => Stack(children: <Widget>[
-                      children: <Widget> [
+                          BaseTextFormField(
-                        BaseTextFormField(
+                              controller: addressController,
-                            controller: addressController,
+                              readOnly: true,
-                            readOnly: true,
+                              borderColor: Colors.transparent,
-                            borderColor: Colors.transparent,
+                              suffixIcon:
-                            suffixIcon: SizedBox(
+                                  SizedBox(width: _isMoneroWallet ? 80 : 36),
-                              width: _isMoneroWallet ? 80 : 36
+                              textStyle: TextStyle(
-                            ),
+                                  fontSize: 16,
-                            textStyle: TextStyle(
+                                  fontWeight: FontWeight.w600,
-                                fontSize: 16,
+                                  color: Colors.white),
-                                fontWeight: FontWeight.w600,
+                              validator: widget.addressTextFieldValidator),
-                                color: Colors.white),
+                          Positioned(
-                            validator: widget.addressTextFieldValidator
+                              top: 2,
-                        ),
+                              right: 0,
-                        Positioned(
+                              child: SizedBox(
-                            top: 2,
+                                  width: _isMoneroWallet ? 80 : 36,
-                            right: 0,
+                                  child: Row(children: <Widget>[
-                            child: SizedBox(
+                                    if (_isMoneroWallet)
-                              width: _isMoneroWallet ? 80 : 36,
+                                      Padding(
-                              child: Row(
+                                        padding: EdgeInsets.only(left: 10),
-                                children: <Widget>[
+                                        child: Container(
-                                  if (_isMoneroWallet) Padding(
+                                            width: 34,
-                                    padding: EdgeInsets.only(left: 10),
+                                            height: 34,
-                                    child: Container(
+                                            padding: EdgeInsets.only(top: 0),
-                                        width: 34,
+                                            child: InkWell(
-                                        height: 34,
+                                              onTap: () async {
-                                        padding: EdgeInsets.only(top: 0),
+                                                final contact =
-                                        child: InkWell(
+                                                    await Navigator.of(context,
-                                          onTap: () async {
+                                                            rootNavigator: true)
-                                            final contact = await Navigator
+                                                        .pushNamed(Routes
-                                              .of(context, rootNavigator: true)
+                                                            .pickerAddressBook);
-                                              .pushNamed(
-                                                Routes.pickerAddressBook);
 
-                                            if (contact is ContactBase &&
+                                                if (contact is ContactBase &&
-                                                contact.address != null) {
+                                                    contact.address != null) {
-                                              setState(() =>
+                                                  setState(() =>
-                                              addressController.text =
+                                                      addressController.text =
-                                                  contact.address);
+                                                          contact.address);
-                                              widget.onPushAddressBookButton
+                                                  widget.onPushAddressBookButton
-                                                  ?.call(context);
+                                                      ?.call(context);
-                                            }
+                                                }
-                                          },
+                                              },
-                                          child: Container(
+                                              child: Container(
-                                              padding: EdgeInsets.all(8),
+                                                  padding: EdgeInsets.all(8),
-                                              decoration: BoxDecoration(
+                                                  decoration: BoxDecoration(
-                                                color: widget
+                                                      color: widget
-                                                    .addressButtonsColor,
+                                                          .addressButtonsColor,
-                                                borderRadius: BorderRadius
+                                                      borderRadius:
-                                                    .all(Radius.circular(6))),
+                                                          BorderRadius.all(
-                                              child: Image.asset(
+                                                              Radius.circular(
-                                                'assets/images/open_book.png',
+                                                                  6))),
-                                                color: Theme.of(context)
+                                                  child: Image.asset(
-                                                    .primaryTextTheme
+                                                    'assets/images/open_book.png',
-                                                    .display1
+                                                    color: Theme.of(context)
-                                                    .decorationColor,
+                                                        .primaryTextTheme
-                                              )),
+                                                        .display1
-                                        )),
+                                                        .decorationColor,
-                                  ),
+                                                  )),
-                                  Padding(
+                                            )),
-                                    padding: EdgeInsets.only(left: 2),
+                                      ),
-                                    child: Container(
+                                    Padding(
-                                        width: 34,
+                                        padding: EdgeInsets.only(left: 2),
-                                        height: 34,
+                                        child: Container(
-                                        padding: EdgeInsets.only(top: 0),
+                                            width: 34,
-                                        child: InkWell(
+                                            height: 34,
-                                          onTap: () {
+                                            padding: EdgeInsets.only(top: 0),
-                                            Clipboard.setData(
+                                            child: InkWell(
-                                                ClipboardData(
+                                              onTap: () {
-                                                  text: addressController.text));
+                                                Clipboard.setData(ClipboardData(
-                                            showBar<void>(
+                                                    text: addressController
-                                                context, S.of(context)
+                                                        .text));
-                                                .copied_to_clipboard);
+                                                showBar<void>(
-                                          },
+                                                    context,
-                                          child: Container(
+                                                    S
-                                              padding: EdgeInsets
+                                                        .of(context)
-                                                  .fromLTRB(8, 8, 0, 8),
+                                                        .copied_to_clipboard);
-                                              color: Colors.transparent,
+                                              },
-                                              child: copyImage),
+                                              child: Container(
-                                        ))
+                                                  padding: EdgeInsets.fromLTRB(
-                                  )
+                                                      8, 8, 0, 8),
-                                ]
+                                                  color: Colors.transparent,
-                              )
+                                                  child: copyImage),
-                            )
+                                            )))
-                        )
+                                  ])))
-                      ]
+                        ])),
-                    )
-                ),
               ),
       ]),
     );
@@ -437,6 +432,8 @@ class ExchangeCardState extends State<ExchangeCard> {
             selectedAtIndex: widget.currencies.indexOf(_selectedCurrency),
             items: widget.currencies,
             title: S.of(context).change_currency,
+            isMoneroWallet: _isMoneroWallet,
+            isConvertFrom: widget.hasRefundAddress,
             onItemSelected: (CryptoCurrency item) =>
                 widget.onCurrencySelected != null
                     ? widget.onCurrencySelected(item)

lib/src/screens/exchange/widgets/picker_item.dart

@@ -0,0 +1,10 @@
+class PickerItem<T> {
+  PickerItem(this.original,
+      {this.title, this.iconPath, this.tag, this.description});
+
+  final String title;
+  final String iconPath;
+  final String tag;
+  final T original;
+  final String description;
+}

lib/src/widgets/standard_list.dart

@@ -69,18 +69,22 @@ class SectionHeaderListRow extends StatelessWidget {
 }
 
 class StandardListSeparator extends StatelessWidget {
-  StandardListSeparator({this.padding});
+
+  StandardListSeparator({this.padding,this.height=1});
 
   final EdgeInsets padding;
+  final double height;
+
+
 
   @override
   Widget build(BuildContext context) {
     return Container(
-        height: 1,
+        height: height,
         padding: padding,
         color: Theme.of(context).backgroundColor,
         child: Container(
-            height: 1,
+            height: height,
             color: Theme.of(context).primaryTextTheme.title.backgroundColor));
   }
 }
@@ -98,6 +102,7 @@ class StandardList extends StatelessWidget {
             StandardListSeparator(padding: EdgeInsets.only(left: 24)),
         itemCount: itemCount,
         itemBuilder: itemBuilder);
+
   }
 }
 

res/values/strings_de.arb

@@ -524,7 +524,7 @@
   "third_intro_title" : "Yat spielt gut mit anderen",
   "third_intro_content" : "Yats leben auch außerhalb von Cake Wallet. Jede Wallet-Adresse auf der Welt kann durch ein Yat ersetzt werden!",
   "learn_more" : "Erfahren Sie mehr",
-
+  "search": "Suche",
   "new_template" : "neue Vorlage",
   "electrum_address_disclaimer": "Wir generieren jedes Mal neue Adressen, wenn Sie eine verwenden, aber vorherige Adressen funktionieren weiterhin"
 }

res/values/strings_en.arb

@@ -524,7 +524,7 @@
   "third_intro_title" : "Yat plays nicely with others",
   "third_intro_content" : "Yats live outside of Cake Wallet, too. Any wallet address on earth can be replaced with a Yat!",
   "learn_more" : "Learn More",
-
+  "search": "Search",
   "new_template" : "New Template",
   "electrum_address_disclaimer": "We generate new addresses each time you use one, but previous addresses continue to work"
 }

res/values/strings_es.arb

@@ -524,7 +524,7 @@
   "third_intro_title" : "Yat juega muy bien con otras",
   "third_intro_content" : "Los Yats también viven fuera de Cake Wallet. Cualquier dirección de billetera en la tierra se puede reemplazar con un Yat!",
   "learn_more" : "Aprende más",
-
+  "search": "Búsqueda",
   "new_template" : "Nueva plantilla",
   "electrum_address_disclaimer": "Generamos nuevas direcciones cada vez que usa una, pero las direcciones anteriores siguen funcionando"
 }

res/values/strings_hi.arb

@@ -524,7 +524,7 @@
   "third_intro_title" : "Yat दूसरों के साथ अच्छा खेलता है",
   "third_intro_content" : "Yats Cake Wallet के बाहर भी रहता है। धरती पर किसी भी वॉलेट पते को Yat से बदला जा सकता है!",
   "learn_more" : "और अधिक जानें",
-
+  "search": "खोज",
   "new_template" : "नया टेम्पलेट",
   "electrum_address_disclaimer": "हर बार जब आप एक का उपयोग करते हैं तो हम नए पते उत्पन्न करते हैं, लेकिन पिछले पते काम करना जारी रखते हैं"
 }

res/values/strings_hr.arb

@@ -524,7 +524,7 @@
   "third_intro_title" : "Yat se lijepo igra s drugima",
   "third_intro_content" : "Yats žive i izvan Cake Wallet -a. Bilo koja adresa novčanika na svijetu može se zamijeniti Yat!",
   "learn_more" : "Saznajte više",
-
+  "search": "Traži",
   "new_template" : "novi predložak",
   "electrum_address_disclaimer": "Minden egyes alkalommal új címeket generálunk, de a korábbi címek továbbra is működnek"
 }

res/values/strings_it.arb

@@ -524,7 +524,7 @@
   "third_intro_title" : "Yat gioca bene con gli altri",
   "third_intro_content" : "Anche Yats vive fuori da Cake Wallet. Qualsiasi indirizzo di portafoglio sulla terra può essere sostituito con un Yat!",
   "learn_more" : "Impara di più",
-
+  "search": "Ricerca",
   "new_template" : "Nuovo modello",
   "electrum_address_disclaimer": "Generiamo nuovi indirizzi ogni volta che ne utilizzi uno, ma gli indirizzi precedenti continuano a funzionare"
 }

res/values/strings_ja.arb

@@ -524,7 +524,7 @@
   "third_intro_title" : "Yatは他の人とうまく遊ぶ",
   "third_intro_content" : "YatsはCakeWalletの外にも住んでいます。 地球上のどのウォレットアドレスもYatに置き換えることができます！",
   "learn_more" : "もっと詳しく知る",
-
+  "search": "検索",
   "new_template" : "新しいテンプレート",
   "electrum_address_disclaimer": "使用するたびに新しいアドレスが生成されますが、以前のアドレスは引き続き機能します"
 }

res/values/strings_ko.arb

@@ -524,7 +524,7 @@
   "third_intro_title" : "Yat는 다른 사람들과 잘 놉니다.",
   "third_intro_content" : "Yats는 Cake Wallet 밖에서도 살고 있습니다. 지구상의 모든 지갑 주소는 Yat!",
   "learn_more" : "더 알아보기",
-
+  "search": "찾다",
   "new_template" : "새 템플릿",
   "electrum_address_disclaimer": "사용할 때마다 새 주소가 생성되지만 이전 주소는 계속 작동합니다."
 }

res/values/strings_nl.arb

@@ -524,7 +524,7 @@
   "third_intro_title" : "Yat speelt leuk met anderen",
   "third_intro_content" : "Yats wonen ook buiten Cake Wallet. Elk portemonnee-adres op aarde kan worden vervangen door een Yat!",
   "learn_more" : "Kom meer te weten",
-
+  "search": "Zoekopdracht",
   "new_template" : "Nieuwe sjabloon",
   "electrum_address_disclaimer": "We generate new addresses each time you use one, but previous addresses continue to work"
 }

res/values/strings_pl.arb

@@ -527,7 +527,7 @@
   "third_intro_title" : "Yat ładnie bawi się z innymi",
   "third_intro_content" : "Yats mieszkają również poza Cake Wallet. Każdy adres portfela na ziemi można zastąpić Yat!",
   "learn_more" : "Ucz się więcej",
-
+  "search": "Szukaj",
   "new_template" : "Nowy szablon",
   "electrum_address_disclaimer": "Za każdym razem, gdy korzystasz z jednego z nich, generujemy nowe adresy, ale poprzednie adresy nadal działają"
 }

res/values/strings_pt.arb

@@ -524,7 +524,7 @@
   "third_intro_title" : "Yat joga bem com os outros",
   "third_intro_content" : "Yats também mora fora da Cake Wallet. Qualquer endereço de carteira na Terra pode ser substituído por um Yat!",
   "learn_more" : "Saber mais",
-
+  "search": "Procurar",
   "new_template" : "Novo modelo",
   "electrum_address_disclaimer": "Geramos novos endereços cada vez que você usa um, mas os endereços anteriores continuam funcionando"
 }

res/values/strings_ru.arb

@@ -524,7 +524,7 @@
   "third_intro_title" : "Yat хорошо взаимодействует с другими",
   "third_intro_content" : "Yat находятся за пределами Cake Wallet. Любой адрес кошелька на земле можно заменить на Yat!",
   "learn_more" : "Узнать больше",
-
+  "search": "Поиск",
   "new_template" : "Новый шаблон",
   "electrum_address_disclaimer": "Мы генерируем новые адреса каждый раз, когда вы их используете, но предыдущие адреса продолжают работать."
 }

res/values/strings_uk.arb

@@ -523,7 +523,7 @@
   "third_intro_title" : "Yat добре взаємодіє з іншими",
   "third_intro_content" : "Yat знаходиться за межами Cake Wallet. Будь-яку адресу гаманця на землі можна замінити на Yat!",
   "learn_more" : "Дізнатися більше",
-
+  "search": "Пошук",
   "new_template" : "Новий шаблон",
   "electrum_address_disclaimer": "Ми створюємо нові адреси щоразу, коли ви використовуєте їх, але попередні адреси продовжують працювати"
 }

res/values/strings_zh.arb

@@ -522,7 +522,7 @@
   "third_intro_title" : "Yat 和別人玩得很好",
   "third_intro_content" : "Yats 也住在 Cake Wallet 之外。 地球上任何一個錢包地址都可以用一個Yat來代替！",
   "learn_more" : "了解更多",
-
+  "search": "搜索",
   "new_template" : "新模板",
   "electrum_address_disclaimer": "每次您使用一个地址时，我们都会生成新地址，但之前的地址仍然有效"
 }