desktop exchange flow tweaks and show QR code

lib/pages/exchange_view/exchange_form.dart

@@ -1024,6 +1024,7 @@ class _ExchangeFormState extends ConsumerState<ExchangeForm> {
         if (isDesktop) {
           await showDialog<void>(
             context: context,
+            barrierDismissible: false,
             builder: (context) {
               return DesktopDialog(
                 maxWidth: 720,
@@ -1052,6 +1053,7 @@ class _ExchangeFormState extends ConsumerState<ExchangeForm> {
         if (isDesktop) {
           await showDialog<void>(
             context: context,
+            barrierDismissible: false,
             builder: (context) {
               return DesktopDialog(
                 maxWidth: 720,

lib/pages_desktop_specific/desktop_exchange/exchange_steps/subwidgets/desktop_step_1.dart

@@ -104,6 +104,7 @@ class DesktopStep1 extends ConsumerWidget {
                     await showDialog<void>(
                       context: context,
                       barrierColor: Colors.transparent,
+                      barrierDismissible: false,
                       builder: (context) {
                         return DesktopDialog(
                           maxWidth: 720,

lib/pages_desktop_specific/desktop_exchange/exchange_steps/subwidgets/desktop_step_2.dart

@@ -1,7 +1,10 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:stackwallet/models/contact_address_entry.dart';
 import 'package:stackwallet/models/exchange/incomplete_exchange.dart';
+import 'package:stackwallet/pages_desktop_specific/desktop_exchange/exchange_steps/step_scaffold.dart';
+import 'package:stackwallet/pages_desktop_specific/desktop_exchange/exchange_steps/subwidgets/desktop_step_3.dart';
 import 'package:stackwallet/pages_desktop_specific/desktop_exchange/subwidgets/desktop_choose_from_stack.dart';
 import 'package:stackwallet/pages_desktop_specific/home/my_stack_view/wallet_view/sub_widgets/address_book_address_chooser/address_book_address_chooser.dart';
 import 'package:stackwallet/providers/exchange/exchange_send_from_wallet_id_provider.dart';
@@ -13,6 +16,8 @@ import 'package:stackwallet/utilities/logger.dart';
 import 'package:stackwallet/utilities/text_styles.dart';
 import 'package:stackwallet/utilities/theme/stack_colors.dart';
 import 'package:stackwallet/widgets/custom_buttons/blue_text_button.dart';
+import 'package:stackwallet/widgets/desktop/desktop_dialog.dart';
+import 'package:stackwallet/widgets/desktop/desktop_dialog_close_button.dart';
 import 'package:stackwallet/widgets/desktop/primary_button.dart';
 import 'package:stackwallet/widgets/desktop/secondary_button.dart';
 import 'package:stackwallet/widgets/icon_widgets/addressbook_icon.dart';
@@ -22,10 +27,6 @@ import 'package:stackwallet/widgets/rounded_white_container.dart';
 import 'package:stackwallet/widgets/stack_text_field.dart';
 import 'package:stackwallet/widgets/textfield_icon_button.dart';
 
-import '../../../../models/contact_address_entry.dart';
-import '../../../../widgets/desktop/desktop_dialog.dart';
-import '../../../../widgets/desktop/desktop_dialog_close_button.dart';
-
 class DesktopStep2 extends ConsumerStatefulWidget {
   const DesktopStep2({
     Key? key,
@@ -552,8 +553,25 @@ class _DesktopStep2State extends ConsumerState<DesktopStep2> {
                 child: PrimaryButton(
                   label: "Next",
                   buttonHeight: ButtonHeight.l,
-                  onPressed: () {
+                  onPressed: () async {
-                    // todo
+                    await showDialog<void>(
+                      context: context,
+                      barrierColor: Colors.transparent,
+                      barrierDismissible: false,
+                      builder: (context) {
+                        return DesktopDialog(
+                          maxWidth: 720,
+                          maxHeight: double.infinity,
+                          child: StepScaffold(
+                            step: 3,
+                            model: model,
+                            body: DesktopStep3(
+                              model: model,
+                            ),
+                          ),
+                        );
+                      },
+                    );
                   },
                 ),
               ),

lib/pages_desktop_specific/desktop_exchange/exchange_steps/subwidgets/desktop_step_3.dart

@@ -4,8 +4,9 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:stackwallet/models/exchange/incomplete_exchange.dart';
 import 'package:stackwallet/models/exchange/response_objects/trade.dart';
-import 'package:stackwallet/pages/exchange_view/exchange_step_views/step_4_view.dart';
 import 'package:stackwallet/pages/exchange_view/sub_widgets/exchange_rate_sheet.dart';
+import 'package:stackwallet/pages_desktop_specific/desktop_exchange/exchange_steps/step_scaffold.dart';
+import 'package:stackwallet/pages_desktop_specific/desktop_exchange/exchange_steps/subwidgets/desktop_step_4.dart';
 import 'package:stackwallet/pages_desktop_specific/desktop_exchange/exchange_steps/subwidgets/desktop_step_item.dart';
 import 'package:stackwallet/providers/exchange/current_exchange_name_state_provider.dart';
 import 'package:stackwallet/providers/exchange/exchange_provider.dart';
@@ -16,10 +17,11 @@ import 'package:stackwallet/utilities/assets.dart';
 import 'package:stackwallet/utilities/text_styles.dart';
 import 'package:stackwallet/utilities/theme/stack_colors.dart';
 import 'package:stackwallet/widgets/custom_loading_overlay.dart';
+import 'package:stackwallet/widgets/desktop/desktop_dialog.dart';
 import 'package:stackwallet/widgets/desktop/primary_button.dart';
 import 'package:stackwallet/widgets/desktop/secondary_button.dart';
+import 'package:stackwallet/widgets/desktop/simple_desktop_dialog.dart';
 import 'package:stackwallet/widgets/rounded_white_container.dart';
-import 'package:stackwallet/widgets/stack_dialog.dart';
 
 class DesktopStep3 extends ConsumerStatefulWidget {
   const DesktopStep3({
@@ -76,14 +78,15 @@ class _DesktopStep3State extends ConsumerState<DesktopStep3> {
         Navigator.of(context).pop();
       }
 
-      unawaited(showDialog<void>(
+      unawaited(
+        showDialog<void>(
           context: context,
           barrierDismissible: true,
-        builder: (_) => StackDialog(
+          builder: (_) => SimpleDesktopDialog(
               title: "Failed to create trade",
-          message: response.exception?.toString(),
+              message: response.exception?.toString() ?? ""),
         ),
-      ));
+      );
       return;
     }
 
@@ -106,7 +109,8 @@ class _DesktopStep3State extends ConsumerState<DesktopStep3> {
       Navigator.of(context).pop();
     }
 
-    unawaited(NotificationApi.showNotification(
+    unawaited(
+      NotificationApi.showNotification(
         changeNowId: model.trade!.tradeId,
         title: status,
         body: "Trade ID ${model.trade!.tradeId}",
@@ -115,13 +119,30 @@ class _DesktopStep3State extends ConsumerState<DesktopStep3> {
         date: model.trade!.timestamp,
         shouldWatchForUpdates: true,
         coinName: "coinName",
-    ));
+      ),
+    );
 
     if (mounted) {
-      unawaited(Navigator.of(context).pushNamed(
+      unawaited(
-        Step4View.routeName,
+        showDialog<void>(
-        arguments: model,
+          context: context,
-      ));
+          barrierColor: Colors.transparent,
+          barrierDismissible: false,
+          builder: (context) {
+            return DesktopDialog(
+              maxWidth: 720,
+              maxHeight: double.infinity,
+              child: StepScaffold(
+                step: 4,
+                model: model,
+                body: DesktopStep4(
+                  model: model,
+                ),
+              ),
+            );
+          },
+        ),
+      );
     }
   }
 

lib/pages_desktop_specific/desktop_exchange/exchange_steps/subwidgets/desktop_step_4.dart

@@ -2,12 +2,14 @@ import 'dart:async';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:qr_flutter/qr_flutter.dart';
 import 'package:stackwallet/models/exchange/incomplete_exchange.dart';
 import 'package:stackwallet/pages_desktop_specific/desktop_exchange/exchange_steps/subwidgets/desktop_step_item.dart';
 import 'package:stackwallet/providers/providers.dart';
 import 'package:stackwallet/utilities/enums/coin_enum.dart';
 import 'package:stackwallet/utilities/text_styles.dart';
 import 'package:stackwallet/utilities/theme/stack_colors.dart';
+import 'package:stackwallet/widgets/desktop/desktop_dialog.dart';
 import 'package:stackwallet/widgets/desktop/primary_button.dart';
 import 'package:stackwallet/widgets/desktop/secondary_button.dart';
 import 'package:stackwallet/widgets/rounded_container.dart';
@@ -148,7 +150,7 @@ class _DesktopStep4State extends ConsumerState<DesktopStep4> {
               DesktopStepItem(
                 label: "Amount",
                 value:
-                    "${model.sendAmount.toString()} ${model.sendTicker.toUpperCase()}",
+                    "${model.sendAmount.toStringAsFixed(8)} ${model.sendTicker.toUpperCase()}",
               ),
               Container(
                 height: 1,
@@ -208,7 +210,50 @@ class _DesktopStep4State extends ConsumerState<DesktopStep4> {
                   label: "Show QR code",
                   buttonHeight: ButtonHeight.l,
                   onPressed: () {
-                    // todo
+                    showDialog<dynamic>(
+                      context: context,
+                      barrierColor: Colors.transparent,
+                      barrierDismissible: true,
+                      builder: (_) {
+                        return DesktopDialog(
+                          maxHeight: 720,
+                          maxWidth: 720,
+                          child: Column(
+                            mainAxisAlignment: MainAxisAlignment.center,
+                            crossAxisAlignment: CrossAxisAlignment.center,
+                            children: [
+                              Text(
+                                "Send ${model.sendAmount.toStringAsFixed(8)} ${model.sendTicker} to this address",
+                                style: STextStyles.desktopH3(context),
+                              ),
+                              const SizedBox(
+                                height: 48,
+                              ),
+                              Center(
+                                child: QrImage(
+                                  // TODO: grab coin uri scheme from somewhere
+                                  // data: "${coin.uriScheme}:$receivingAddress",
+                                  data: model.trade!.payInAddress,
+                                  size: 290,
+                                  foregroundColor: Theme.of(context)
+                                      .extension<StackColors>()!
+                                      .accentColorDark,
+                                ),
+                              ),
+                              const SizedBox(
+                                height: 48,
+                              ),
+                              SecondaryButton(
+                                label: "Cancel",
+                                width: 310,
+                                buttonHeight: ButtonHeight.l,
+                                onPressed: Navigator.of(context).pop,
+                              ),
+                            ],
+                          ),
+                        );
+                      },
+                    );
                   },
                 ),
               ),

lib/pages_desktop_specific/desktop_exchange/exchange_steps/subwidgets/desktop_step_item.dart

@@ -24,6 +24,7 @@ class DesktopStepItem extends StatelessWidget {
       child: ConditionalParent(
         condition: vertical,
         builder: (child) => Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             child,
             const SizedBox(

lib/pages_desktop_specific/desktop_exchange/subwidgets/desktop_trade_history.dart

@@ -31,6 +31,8 @@ class _DesktopTradeHistoryState extends ConsumerState<DesktopTradeHistory> {
 
     if (hasHistory) {
       return ListView.separated(
+        shrinkWrap: true,
+        primary: false,
         itemBuilder: (context, index) {
           return TradeCard(
             key: Key("tradeCard_${trades[index].uuid}"),