made text fields work on mobile too

Demos/Demos.csproj

@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <OutputType>Exe</OutputType>
-        <TargetFramework>netcoreapp2.0</TargetFramework>
+        <TargetFramework>net462</TargetFramework>
     </PropertyGroup>
 
     <ItemGroup>
@@ -14,7 +14,7 @@
 
     <ItemGroup>
         <PackageReference Include="MonoGame.Content.Builder" Version="3.7.0.9" />
-        <PackageReference Include="MonoGame.Framework.DesktopGL.Core" Version="3.7.0.7" />
+        <PackageReference Include="MonoGame.Framework.DesktopGL" Version="3.7.0.1708" />
     </ItemGroup>
 
     <ItemGroup>

MLEM.Extended/MLEM.Extended.csproj

@@ -17,7 +17,7 @@
         <PackageReference Include="MonoGame.Extended" Version="3.7.0">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
-        <PackageReference Include="MonoGame.Framework.Portable" Version="3.6.0.1625">
+        <PackageReference Include="MonoGame.Framework.Portable" Version="3.7.1.189">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
     </ItemGroup>

MLEM.Startup/MLEM.Startup.csproj

@@ -17,7 +17,7 @@
     <ItemGroup>
         <PackageReference Include="Coroutine" Version="1.0.1" />
         <PackageReference Include="MonoGame.Extended" Version="3.7.0" />
-        <PackageReference Include="MonoGame.Framework.Portable" Version="3.6.0.1625">
+        <PackageReference Include="MonoGame.Framework.Portable" Version="3.7.1.189">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
     </ItemGroup>

MLEM.Ui/Elements/TextField.cs

@@ -6,6 +6,7 @@ using Microsoft.Xna.Framework.Graphics;
 using Microsoft.Xna.Framework.Input;
 using MLEM.Extensions;
 using MLEM.Font;
+using MLEM.Input;
 using MLEM.Textures;
 using MLEM.Ui.Style;
 
@@ -30,21 +31,35 @@ namespace MLEM.Ui.Elements {
         private double caretBlinkTimer;
         private int textStartIndex;
         public Rule InputRule;
+        public string MobileTitle;
+        public string MobileDescription;
 
         public TextField(Anchor anchor, Vector2 size, Rule rule = null, IGenericFont font = null) : base(anchor, size) {
             this.InputRule = rule ?? DefaultRule;
             this.font = font;
-            this.OnTextInput += (element, key, character) => {
+
-                if (!this.IsSelected)
+            if (InputHandler.TextInputSupported) {
-                    return;
+                this.OnTextInput += (element, key, character) => {
-                if (key == Keys.Back) {
+                    if (!this.IsSelected)
-                    if (this.text.Length > 0) {
+                        return;
-                        this.RemoveText(this.text.Length - 1, 1);
+                    if (key == Keys.Back) {
+                        if (this.text.Length > 0) {
+                            this.RemoveText(this.text.Length - 1, 1);
+                        }
+                    } else {
+                        this.AppendText(character);
                     }
-                } else {
+                };
-                    this.AppendText(character);
+            } else {
-                }
+                this.OnPressed += async e => {
-            };
+                    if (!KeyboardInput.IsVisible) {
+                        var title = this.MobileTitle ?? this.PlaceholderText;
+                        var result = await KeyboardInput.Show(title, this.MobileDescription, this.Text);
+                        if (result != null)
+                            this.SetText(result.Replace('\n', ' '));
+                    }
+                };
+            }
         }
 
         private void HandleTextChange() {
@@ -106,7 +121,7 @@ namespace MLEM.Ui.Elements {
         }
 
         public void AppendText(object text) {
-            if (!this.InputRule(this,  text.ToString()))
+            if (!this.InputRule(this, text.ToString()))
                 return;
             this.text.Append(text);
             this.HandleTextChange();

MLEM.Ui/MLEM.Ui.csproj

@@ -14,7 +14,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="MonoGame.Framework.Portable" Version="3.6.0.1625">
+        <PackageReference Include="MonoGame.Framework.Portable" Version="3.7.1.189">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
     </ItemGroup>

MLEM.Ui/UiSystem.cs

@@ -48,7 +48,6 @@ namespace MLEM.Ui {
         public BlendState BlendState;
         public SamplerState SamplerState = SamplerState.PointClamp;
         public UiControls Controls;
-        public readonly bool SupportsTextInput;
 
         public UiSystem(GameWindow window, GraphicsDevice device, UiStyle style, InputHandler inputHandler = null) {
             this.Controls = new UiControls(this, inputHandler);
@@ -63,17 +62,18 @@ namespace MLEM.Ui {
                     root.Element.ForceUpdateArea();
             };
 
-            try {
+            if (InputHandler.TextInputSupported) {
-                NativeTextInput.AddToTextInput(window, (key, character) => {
+                AddToTextInput(window, (key, character) => {
                     foreach (var root in this.rootElements)
                         root.Element.Propagate(e => e.OnTextInput?.Invoke(e, key, character));
                 });
-                this.SupportsTextInput = true;
-            } catch (TypeLoadException) {
-                this.SupportsTextInput = false;
             }
         }
 
+        private static void AddToTextInput(GameWindow window, Action<Keys, char> func) {
+            window.TextInput += (sender, args) => func(args.Key, args.Character);
+        }
+
         public void Update(GameTime time) {
             this.Controls.Update();
 
@@ -146,14 +146,6 @@ namespace MLEM.Ui {
                 root.Element.Propagate(action);
         }
 
-        private static class NativeTextInput {
-
-            internal static void AddToTextInput(GameWindow window, Action<Keys, char> func) {
-                window.TextInput += (sender, args) => func(args.Key, args.Character);
-            }
-
-        }
-
     }
 
     public class RootElement {

MLEM/Input/InputHandler.cs

@@ -11,6 +11,7 @@ namespace MLEM.Input {
     public class InputHandler {
 
         public static MouseButton[] MouseButtons = EnumHelper.GetValues<MouseButton>().ToArray();
+        public static readonly bool TextInputSupported = typeof(GameWindow).GetEvent("TextInput") != null;
 
         public KeyboardState LastKeyboardState { get; private set; }
         public KeyboardState KeyboardState { get; private set; }
@@ -40,7 +41,6 @@ namespace MLEM.Input {
             this.HandleMouse = handleMouse;
             this.HandleGamepads = handleGamepads;
             this.HandleTouch = handleTouch;
-
             this.Gestures = this.gestures.AsReadOnly();
         }
 

MLEM/MLEM.csproj

@@ -14,7 +14,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="MonoGame.Framework.Portable" Version="3.6.0.1625">
+        <PackageReference Include="MonoGame.Framework.Portable" Version="3.7.1.189">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
     </ItemGroup>

Test/GameImpl.cs

@@ -39,6 +39,8 @@ namespace AndroidTests {
             panel.AddChild(new Button(Anchor.AutoCenter, new Vector2(0.5F, 10), "Toggle Image") {
                 OnPressed = element => image.IsHidden = !image.IsHidden
             });
+
+            panel.AddChild(new TextField(Anchor.AutoLeft, new Vector2(1, 10)) {PlaceholderText = "Tap to type"});
         }
 
         protected override void DoDraw(GameTime gameTime) {