started working on touch support for MLEM.Ui

MLEM.Ui/Elements/Element.cs

@@ -102,7 +102,6 @@ namespace MLEM.Ui.Elements {
         }
         protected UiControls Controls => this.System.Controls;
         protected InputHandler Input => this.Controls.Input;
-        public Point MousePos => this.Input.MousePosition;
         public RootElement Root { get; internal set; }
         public float Scale => this.Root.ActualScale;
         public Element Parent { get; private set; }
@@ -443,15 +442,15 @@ namespace MLEM.Ui.Elements {
             }
         }
 
-        public virtual Element GetMousedElement() {
+        public virtual Element GetElementUnderPos(Point position) {
             if (this.IsHidden)
                 return null;
             for (var i = this.SortedChildren.Count - 1; i >= 0; i--) {
-                var element = this.SortedChildren[i].GetMousedElement();
+                var element = this.SortedChildren[i].GetElementUnderPos(position);
                 if (element != null)
                     return element;
             }
-            return this.CanBeMoused && this.Area.Contains(this.MousePos) ? this : null;
+            return this.CanBeMoused && this.Area.Contains(position) ? this : null;
         }
 
         protected virtual void InitStyle(UiStyle style) {

MLEM.Ui/Elements/Panel.cs

@@ -117,11 +117,11 @@ namespace MLEM.Ui.Elements {
             base.DrawEarly(time, batch, alpha, blendState, samplerState);
         }
 
-        public override Element GetMousedElement() {
+        public override Element GetElementUnderPos(Point position) {
             // if overflow is handled, don't propagate mouse checks to hidden children
-            if (this.scrollOverflow && !this.GetRenderTargetArea().Contains(this.MousePos))
+            if (this.scrollOverflow && !this.GetRenderTargetArea().Contains(position))
                 return null;
-            return base.GetMousedElement();
+            return base.GetElementUnderPos(position);
         }
 
         private Rectangle GetRenderTargetArea() {

MLEM.Ui/Elements/ScrollBar.cs

@@ -56,11 +56,12 @@ namespace MLEM.Ui.Elements {
             }
 
             if (this.isMouseHeld) {
+                var mouse = this.Input.MousePosition;
                 if (this.Horizontal) {
-                    var internalX = this.MousePos.X - this.Area.X - this.ScrollerSize.X * this.Scale / 2;
+                    var internalX = mouse.X - this.Area.X - this.ScrollerSize.X * this.Scale / 2;
                     this.CurrentValue = internalX / (this.Area.Width - this.ScrollerSize.X * this.Scale) * this.MaxValue;
                 } else {
-                    var internalY = this.MousePos.Y - this.Area.Y - this.ScrollerSize.Y * this.Scale / 2;
+                    var internalY = mouse.Y - this.Area.Y - this.ScrollerSize.Y * this.Scale / 2;
                     this.CurrentValue = internalY / (this.Area.Height - this.ScrollerSize.Y * this.Scale) * this.MaxValue;
                 }
             }

MLEM.Ui/Elements/Tooltip.cs

@@ -25,7 +25,7 @@ namespace MLEM.Ui.Elements {
             base.Update(time);
 
             var viewport = this.System.Viewport.Size;
-            var offset = this.MousePos.ToVector2() / this.Scale + this.MouseOffset;
+            var offset = this.Input.MousePosition.ToVector2() / this.Scale + this.MouseOffset;
             if (offset.X < 0)
                 offset.X = 0;
             if (offset.Y < 0)

MLEM.Ui/UiControls.cs

@@ -2,6 +2,7 @@ using System;
 using System.Linq;
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Input;
+using Microsoft.Xna.Framework.Input.Touch;
 using MLEM.Input;
 using MLEM.Ui.Elements;
 
@@ -20,14 +21,17 @@ namespace MLEM.Ui {
             this.system = system;
             this.Input = inputHandler ?? new InputHandler();
             this.isInputOurs = inputHandler == null;
+
+            // enable all required gestures
+            this.Input.EnableGestures(GestureType.Tap, GestureType.Hold);
         }
 
         public void Update() {
             if (this.isInputOurs)
                 this.Input.Update();
 
-            var mousedNow = this.GetMousedElement();
+            // MOUSE INPUT
-            // mouse new element
+            var mousedNow = this.GetElementUnderPos(this.Input.MousePosition);
             if (mousedNow != this.MousedElement) {
                 if (this.MousedElement != null)
                     this.MousedElement.OnMouseExit?.Invoke(this.MousedElement);
@@ -38,19 +42,17 @@ namespace MLEM.Ui {
             }
             
             if (this.Input.IsMouseButtonPressed(MouseButton.Left)) {
-                // select element
                 var selectedNow = mousedNow != null && mousedNow.CanBeSelected ? mousedNow : null;
-                if (this.SelectedElement != selectedNow)
                 this.SelectElement(selectedNow, true);
-
-                // first action on element
                 if (mousedNow != null)
                     mousedNow.OnPressed?.Invoke(mousedNow);
             } else if (this.Input.IsMouseButtonPressed(MouseButton.Right)) {
-                // secondary action on element
                 if (mousedNow != null)
                     mousedNow.OnSecondaryPressed?.Invoke(mousedNow);
-            } else if (this.Input.IsKeyPressed(Keys.Enter) || this.Input.IsKeyPressed(Keys.Space)) {
+            }
+            
+            // KEYBOARD INPUT
+            else if (this.Input.IsKeyPressed(Keys.Enter) || this.Input.IsKeyPressed(Keys.Space)) {
                 if (this.SelectedElement != null) {
                     if (this.Input.IsModifierKeyDown(ModifierKey.Shift)) {
                         // secondary action on element using space or enter
@@ -64,9 +66,25 @@ namespace MLEM.Ui {
                 // tab or shift-tab to next or previous element
                 this.SelectElement(this.GetNextElement(this.Input.IsModifierKeyDown(ModifierKey.Shift)), false);
             }
+            
+            // TOUCH INPUT
+            else if (this.Input.GetGesture(GestureType.Tap, out var tap)) {
+                var tapped = this.GetElementUnderPos(tap.Position.ToPoint());
+                this.SelectElement(tapped, true);
+                if (tapped != null)
+                    tapped.OnPressed?.Invoke(tapped);
+            } else if (this.Input.GetGesture(GestureType.Hold, out var hold)) {
+                var held = this.GetElementUnderPos(hold.Position.ToPoint());
+                this.SelectElement(held, true);
+                if (held != null)
+                    held.OnSecondaryPressed?.Invoke(held);
+            }
         }
 
         public void SelectElement(Element element, bool mouse) {
+            if (this.SelectedElement == element)
+                return;
+
             if (this.SelectedElement != null)
                 this.SelectedElement.OnDeselected?.Invoke(this.SelectedElement);
             if (element != null)
@@ -76,9 +94,9 @@ namespace MLEM.Ui {
             this.system.Propagate(e => e.OnSelectedElementChanged?.Invoke(e, element));
         }
 
-        public Element GetMousedElement() {
+        public Element GetElementUnderPos(Point position) {
             foreach (var root in this.system.GetRootElements()) {
-                var moused = root.Element.GetMousedElement();
+                var moused = root.Element.GetElementUnderPos(position);
                 if (moused != null)
                     return moused;
             }

MLEM.Ui/UiSystem.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
 using MLEM.Extensions;
 using MLEM.Font;
 using MLEM.Input;
@@ -61,11 +62,12 @@ namespace MLEM.Ui {
                 foreach (var root in this.rootElements)
                     root.Element.ForceUpdateArea();
             };
+            
             try {
-                window.TextInput += (sender, args) => {
+                NativeTextInput.AddToTextInput(window, (key, character) => {
                     foreach (var root in this.rootElements)
-                        root.Element.Propagate(e => e.OnTextInput?.Invoke(e, args.Key, args.Character));
+                        root.Element.Propagate(e => e.OnTextInput?.Invoke(e, key, character));
-                };
+                });
                 this.SupportsTextInput = true;
             } catch (TypeLoadException) {
                 this.SupportsTextInput = false;
@@ -144,6 +146,14 @@ 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.sln

@@ -10,6 +10,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Demos", "Demos\Demos.csproj
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MLEM.Ui", "MLEM.Ui\MLEM.Ui.csproj", "{6F00629A-8B87-4264-8896-19983285E32F}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AndroidTests", "Test\AndroidTests.csproj", "{410C0262-131C-4D0E-910D-D01B4F7143E0}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -36,5 +38,9 @@ Global
 		{6F00629A-8B87-4264-8896-19983285E32F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{6F00629A-8B87-4264-8896-19983285E32F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{6F00629A-8B87-4264-8896-19983285E32F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{410C0262-131C-4D0E-910D-D01B4F7143E0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{410C0262-131C-4D0E-910D-D01B4F7143E0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{410C0262-131C-4D0E-910D-D01B4F7143E0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{410C0262-131C-4D0E-910D-D01B4F7143E0}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal

MLEM/Input/InputHandler.cs

@@ -176,12 +176,19 @@ namespace MLEM.Input {
             return this.WasGamepadButtonUp(button, index) && this.IsGamepadButtonDown(button, index);
         }
 
-        public GestureSample GetGesture(GestureType type) {
+        public void EnableGestures(params GestureType[] gestures) {
-            foreach (var gesture in this.Gestures) {
+            foreach (var gesture in gestures)
-                if (gesture.GestureType == type)
+                TouchPanel.EnabledGestures |= gesture;
-                    return gesture;
         }
-            return default;
+
+        public bool GetGesture(GestureType type, out GestureSample sample) {
+            foreach (var gesture in this.Gestures) {
+                if (gesture.GestureType == type) {
+                    sample = gesture;
+                    return true;
+                }
+            }
+            return false;
         }
 
         public bool IsDown(object control, int index = -1) {

Test/Activity1.cs

@@ -0,0 +1,25 @@
+using Android.App;
+using Android.Content.PM;
+using Android.OS;
+using Android.Views;
+
+namespace AndroidTests {
+    [Activity(Label = "AndroidTests"
+        , MainLauncher = true
+        , Icon = "@drawable/icon"
+        , Theme = "@style/Theme.Splash"
+        , AlwaysRetainTaskState = true
+        , LaunchMode = LaunchMode.SingleInstance
+        , ScreenOrientation = ScreenOrientation.UserLandscape
+        , ConfigurationChanges = ConfigChanges.Orientation | ConfigChanges.Keyboard | ConfigChanges.KeyboardHidden | ConfigChanges.ScreenSize)]
+    public class Activity1 : Microsoft.Xna.Framework.AndroidGameActivity {
+
+        protected override void OnCreate(Bundle bundle) {
+            base.OnCreate(bundle);
+            var g = new GameImpl();
+            this.SetContentView((View) g.Services.GetService(typeof(View)));
+            g.Run();
+        }
+
+    }
+}

Test/AndroidTests.csproj

@@ -0,0 +1,114 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\MonoGame\v3.0\MonoGame.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\MonoGame\v3.0\MonoGame.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>8.0.30703</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{410C0262-131C-4D0E-910D-D01B4F7143E0}</ProjectGuid>
+    <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>AndroidTests</RootNamespace>
+    <AssemblyName>AndroidTests</AssemblyName>
+    <FileAlignment>512</FileAlignment>
+    <AndroidApplication>true</AndroidApplication>
+    <AndroidResgenFile>Resources\Resource.Designer.cs</AndroidResgenFile>
+    <GenerateSerializationAssemblies>Off</GenerateSerializationAssemblies>
+    <AndroidSupportedAbis>armeabi-v7a;x86</AndroidSupportedAbis>
+    <AndroidStoreUncompressedFileExtensions>.m4a</AndroidStoreUncompressedFileExtensions>
+    <MandroidI18n />
+    <TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
+    <MonoGamePlatform>Android</MonoGamePlatform>
+    <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
+    <AndroidUseLatestPlatformSdk>True</AndroidUseLatestPlatformSdk>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\$(MonoGamePlatform)\$(Platform)\$(Configuration)\</OutputPath>
+    <DefineConstants>DEBUG;TRACE;ANDROID</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidUseSharedRuntime>True</AndroidUseSharedRuntime>
+    <AndroidLinkMode>None</AndroidLinkMode>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\$(MonoGamePlatform)\$(Platform)\$(Configuration)\</OutputPath>
+    <DefineConstants>TRACE;ANDROID</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidUseSharedRuntime>False</AndroidUseSharedRuntime>
+    <AndroidLinkMode>SdkOnly</AndroidLinkMode>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Coroutine, Version=1.0.1.0, Culture=neutral, PublicKeyToken=null">
+      <HintPath>..\packages\Coroutine.1.0.1\lib\netstandard2.0\Coroutine.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="Mono.Android" />
+    <Reference Include="MonoGame.Extended, Version=3.7.0.0, Culture=neutral, PublicKeyToken=null">
+      <HintPath>..\packages\MonoGame.Extended.3.7.0\lib\netstandard2.0\MonoGame.Extended.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="mscorlib" />
+    <Reference Include="Newtonsoft.Json, Version=11.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed">
+      <HintPath>..\packages\Newtonsoft.Json.11.0.2\lib\netstandard2.0\Newtonsoft.Json.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Xml" />
+    <Reference Include="MonoGame.Framework">
+      <HintPath>$(MonoGameInstallDirectory)\MonoGame\v3.0\Assemblies\Android\MonoGame.Framework.dll</HintPath>
+    </Reference>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Activity1.cs" />
+    <Compile Include="GameImpl.cs" />
+    <Compile Include="Resources\Resource.Designer.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\Values\Strings.xml" />
+    <AndroidResource Include="Resources\Drawable\Icon.png" />
+    <AndroidResource Include="Resources\Drawable\Splash.png" />
+    <AndroidResource Include="Resources\Values\Styles.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <MonoGameContentReference Include="Content\Content.mgcb" />
+    <None Include="Properties\AndroidManifest.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\MLEM.Extended\MLEM.Extended.csproj">
+      <Project>{232a6513-a28c-4d7f-ba5a-89281bfc1538}</Project>
+      <Name>MLEM.Extended</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\MLEM.Startup\MLEM.Startup.csproj">
+      <Project>{997f4739-7bec-4621-b9ca-68deb2d74412}</Project>
+      <Name>MLEM.Startup</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\MLEM.Ui\MLEM.Ui.csproj">
+      <Project>{6f00629a-8b87-4264-8896-19983285e32f}</Project>
+      <Name>MLEM.Ui</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\MLEM\MLEM.csproj">
+      <Project>{1d6ab762-43c4-4775-8924-707c7ec3f142}</Project>
+      <Name>MLEM</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include="Content\Fonts\TestFont.spritefont" />
+    <Content Include="Content\Textures\Test.png" />
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
+  <Import Project="$(MSBuildExtensionsPath)\MonoGame\v3.0\MonoGame.Content.Builder.targets" />
+</Project>

Test/Content/Content.mgcb

@@ -0,0 +1,34 @@
+
+#----------------------------- Global Properties ----------------------------#
+
+/outputDir:bin/$(Platform)
+/intermediateDir:obj/$(Platform)
+/platform:Android
+/config:
+/profile:Reach
+/compress:False
+
+#-------------------------------- References --------------------------------#
+
+
+#---------------------------------- Content ---------------------------------#
+
+#begin Textures/Test.png
+/importer:TextureImporter
+/processor:TextureProcessor
+/processorParam:ColorKeyColor=255,0,255,255
+/processorParam:ColorKeyEnabled=True
+/processorParam:GenerateMipmaps=False
+/processorParam:PremultiplyAlpha=True
+/processorParam:ResizeToPowerOfTwo=False
+/processorParam:MakeSquare=False
+/processorParam:TextureFormat=Color
+/build:Textures/Test.png
+
+#begin Fonts/TestFont.spritefont
+/importer:FontDescriptionImporter
+/processor:FontDescriptionProcessor
+/processorParam:PremultiplyAlpha=True
+/processorParam:TextureFormat=Compressed
+/build:Fonts/TestFont.spritefont
+

Test/Content/Fonts/TestFont.spritefont

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+This file contains an xml description of a font, and will be read by the XNA
+Framework Content Pipeline. Follow the comments to customize the appearance
+of the font in your game, and to change the characters which are available to draw
+with.
+-->
+<XnaContent xmlns:Graphics="Microsoft.Xna.Framework.Content.Pipeline.Graphics">
+  <Asset Type="Graphics:FontDescription">
+
+    <!--
+    Modify this string to change the font that will be imported.
+    -->
+    <FontName>Arial</FontName>
+
+    <!--
+    Size is a float value, measured in points. Modify this value to change
+    the size of the font.
+    -->
+    <Size>32</Size>
+
+    <!--
+    Spacing is a float value, measured in pixels. Modify this value to change
+    the amount of spacing in between characters.
+    -->
+    <Spacing>0</Spacing>
+
+    <!--
+    UseKerning controls the layout of the font. If this value is true, kerning information
+    will be used when placing characters.
+    -->
+    <UseKerning>true</UseKerning>
+
+    <!--
+    Style controls the style of the font. Valid entries are "Regular", "Bold", "Italic",
+    and "Bold, Italic", and are case sensitive.
+    -->
+    <Style>Regular</Style>
+
+    <!--
+    If you uncomment this line, the default character will be substituted if you draw
+    or measure text that contains characters which were not included in the font.
+    -->
+    <DefaultCharacter>*</DefaultCharacter>
+
+    <!--
+    CharacterRegions control what letters are available in the font. Every
+    character from Start to End will be built and made available for drawing. The
+    default range is from 32, (ASCII space), to 126, ('~'), covering the basic Latin
+    character set. The characters are ordered according to the Unicode standard.
+    See the documentation for more information.
+    -->
+    <CharacterRegions>
+      <CharacterRegion>
+        <Start>&#32;</Start>
+        <End>&#591;</End>
+      </CharacterRegion>
+    </CharacterRegions>
+  </Asset>
+</XnaContent>

Test/GameImpl.cs

@@ -0,0 +1,50 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using MLEM.Font;
+using MLEM.Startup;
+using MLEM.Textures;
+using MLEM.Ui;
+using MLEM.Ui.Elements;
+using MLEM.Ui.Style;
+
+namespace AndroidTests {
+    public class GameImpl : MlemGame {
+
+        protected override void LoadContent() {
+            base.LoadContent();
+            var tex = LoadContent<Texture2D>("Textures/Test");
+            var style = new UntexturedStyle(this.SpriteBatch) {
+                Font = new GenericSpriteFont(LoadContent<SpriteFont>("Fonts/TestFont")),
+                TextScale = 0.1F,
+                PanelTexture = new NinePatch(new TextureRegion(tex, 0, 8, 24, 24), 8),
+                ButtonTexture = new NinePatch(new TextureRegion(tex, 24, 8, 16, 16), 4),
+                TextFieldTexture = new NinePatch(new TextureRegion(tex, 24, 8, 16, 16), 4),
+                ScrollBarBackground = new NinePatch(new TextureRegion(tex, 12, 0, 4, 8), 1, 1, 2, 2),
+                ScrollBarScrollerTexture = new NinePatch(new TextureRegion(tex, 8, 0, 4, 8), 1, 1, 2, 2),
+                CheckboxTexture = new NinePatch(new TextureRegion(tex, 24, 8, 16, 16), 4),
+                CheckboxCheckmark = new TextureRegion(tex, 24, 0, 8, 8),
+                RadioTexture = new NinePatch(new TextureRegion(tex, 16, 0, 8, 8), 3),
+                RadioCheckmark = new TextureRegion(tex, 32, 0, 8, 8)
+            };
+            this.UiSystem.Style = style;
+            this.UiSystem.GlobalScale = 10;
+            this.UiSystem.AutoScaleWithScreen = true;
+
+            var panel = new Panel(Anchor.Center, new Vector2(100, 0), Vector2.Zero, true);
+            this.UiSystem.Add("Panel", panel);
+            panel.AddChild(new Paragraph(Anchor.AutoLeft, 1, "I am Android"));
+
+            var image = new Image(Anchor.AutoCenter, new Vector2(50, 50), new TextureRegion(tex, 0, 0, 8, 8)) {IsHidden = true};
+            panel.AddChild(image);
+            panel.AddChild(new Button(Anchor.AutoCenter, new Vector2(0.5F, 10), "Toggle Image") {
+                OnPressed = element => image.IsHidden = !image.IsHidden
+            });
+        }
+
+        protected override void DoDraw(GameTime gameTime) {
+            this.GraphicsDevice.Clear(Color.CornflowerBlue);
+            base.DoDraw(gameTime);
+        }
+
+    }
+}

Test/Properties/AndroidManifest.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="AndroidTests" android:versionCode="1" android:versionName="1.0">
+	<uses-sdk />
+	<application android:label="AndroidTests"></application>
+</manifest>

Test/Properties/AssemblyInfo.cs

@@ -0,0 +1,41 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using Android.App;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("AndroidTests")]
+[assembly: AssemblyProduct("AndroidTests")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyCopyright("Copyright ©  2017")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("6f377592-2266-4c47-855e-6260ff75e1f4")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
+
+// Add some common permissions, these can be removed if not needed
+[assembly: UsesPermission(Android.Manifest.Permission.Internet)]
+[assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]

Test/Resources/Resource.Designer.cs

@@ -0,0 +1,99 @@
+#pragma warning disable 1591
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+[assembly: global::Android.Runtime.ResourceDesignerAttribute("AndroidTests.Resource", IsApplication=true)]
+
+namespace AndroidTests
+{
+	
+	
+	[System.CodeDom.Compiler.GeneratedCodeAttribute("Xamarin.Android.Build.Tasks", "1.0.0.0")]
+	public partial class Resource
+	{
+		
+		static Resource()
+		{
+			global::Android.Runtime.ResourceIdManager.UpdateIdValues();
+		}
+		
+		public static void UpdateIdValues()
+		{
+		}
+		
+		public partial class Attribute
+		{
+			
+			static Attribute()
+			{
+				global::Android.Runtime.ResourceIdManager.UpdateIdValues();
+			}
+			
+			private Attribute()
+			{
+			}
+		}
+		
+		public partial class Drawable
+		{
+			
+			// aapt resource value: 0x7f020000
+			public const int Icon = 2130837504;
+			
+			// aapt resource value: 0x7f020001
+			public const int Splash = 2130837505;
+			
+			static Drawable()
+			{
+				global::Android.Runtime.ResourceIdManager.UpdateIdValues();
+			}
+			
+			private Drawable()
+			{
+			}
+		}
+		
+		public partial class String
+		{
+			
+			// aapt resource value: 0x7f030001
+			public const int ApplicationName = 2130903041;
+			
+			// aapt resource value: 0x7f030000
+			public const int Hello = 2130903040;
+			
+			static String()
+			{
+				global::Android.Runtime.ResourceIdManager.UpdateIdValues();
+			}
+			
+			private String()
+			{
+			}
+		}
+		
+		public partial class Style
+		{
+			
+			// aapt resource value: 0x7f040000
+			public const int Theme_Splash = 2130968576;
+			
+			static Style()
+			{
+				global::Android.Runtime.ResourceIdManager.UpdateIdValues();
+			}
+			
+			private Style()
+			{
+			}
+		}
+	}
+}
+#pragma warning restore 1591

Test/Resources/Values/Strings.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="Hello">Hello World, Click Me!</string>
+    <string name="ApplicationName">AndroidTests</string>
+</resources>

Test/Resources/Values/Styles.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <style name="Theme.Splash" parent="android:Theme">
+    <item name="android:windowBackground">@drawable/splash</item>
+    <item name="android:windowNoTitle">true</item>
+  </style>
+</resources>

Test/packages.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Coroutine" version="1.0.1" targetFramework="monoandroid90" />
+  <package id="MonoGame.Extended" version="3.7.0" targetFramework="monoandroid90" />
+  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="monoandroid90" />
+</packages>