Add UI for setting solution transfer amount (#4074)

* basic eui and window

* finish EUI, update defaults

* unnecessary usings

* convert to bounduserinterface

* merge me up

merge me up inside

* Fix repeated define for component in prototype

* impl swept UI suggestion

* apply discord reviews

* small changes

Content.Client/Chemistry/UI/TransferAmountBoundUserInterface.cs

@@ -0,0 +1,35 @@
+using Content.Shared.Chemistry;
+using Content.Shared.Chemistry.Reagent;
+using JetBrains.Annotations;
+using Robust.Client.GameObjects;
+using Robust.Shared.GameObjects;
+
+namespace Content.Client.Chemistry.UI
+{
+    [UsedImplicitly]
+    public class TransferAmountBoundUserInterface : BoundUserInterface
+    {
+        private TransferAmountWindow? _window;
+
+        protected override void Open()
+        {
+            base.Open();
+            _window = new TransferAmountWindow();
+
+            _window.applyButton.OnPressed += _ =>
+            {
+                if (int.TryParse(_window.amountLineEdit.Text, out var i))
+                {
+                    SendMessage(new TransferAmountSetValueMessage(ReagentUnit.New(i)));
+                    _window.Close();
+                }
+            };
+
+            _window.OpenCentered();
+        }
+
+        public TransferAmountBoundUserInterface(ClientUserInterfaceComponent owner, object uiKey) : base(owner, uiKey)
+        {
+        }
+    }
+}

Content.Client/Chemistry/UI/TransferAmountWindow.xaml

@@ -0,0 +1,11 @@
+<SS14Window xmlns="https://spacestation14.io"
+            Title="{Loc 'ui-transfer-amount-title'}"
+            Resizable="False">
+
+    <VBoxContainer SeparationOverride="4" CustomMinimumSize="240 80">
+        <HBoxContainer>
+            <LineEdit Name="AmountLineEdit" HorizontalExpand="True" PlaceHolder="{Loc 'ui-transfer-amount-line-edit-placeholder'}"/>
+        </HBoxContainer>
+        <Button Name="ApplyButton" Text="{Loc 'ui-transfer-amount-apply'}"/>
+    </VBoxContainer>
+</SS14Window>

Content.Client/Chemistry/UI/TransferAmountWindow.xaml.cs

@@ -0,0 +1,19 @@
+using Robust.Client.AutoGenerated;
+using Robust.Client.UserInterface.Controls;
+using Robust.Client.UserInterface.CustomControls;
+using Robust.Client.UserInterface.XAML;
+
+namespace Content.Client.Chemistry.UI
+{
+    [GenerateTypedNameReferences]
+    public partial class TransferAmountWindow : SS14Window
+    {
+        public Button applyButton => ApplyButton;
+        public LineEdit amountLineEdit => AmountLineEdit;
+
+        public TransferAmountWindow()
+        {
+            RobustXamlLoader.Load(this);
+        }
+    }
+}