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Implementation of Gum UI in the engine (at least) #1

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a7eb6d3
Add GumUI package reference to Kepler Engine
hazelcode Jan 17, 2026
70f84f9
Add default Gum service for now
hazelcode Jan 19, 2026
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36 changes: 22 additions & 14 deletions KeplerEngine/Globals.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,13 +4,16 @@
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input.Touch;
using MonoGameGum;
using Gum.Forms;
using Gum.Forms.Controls;


namespace KeplerEngine;

public class Globals
{
public static SpriteBatch SpriteBatch { get; set; }

public static RenderTarget2D RenderTarget { get; set; }

/// <summary>
Expand All @@ -21,7 +24,7 @@ public class Globals
/// <summary>
/// VisibleRenderTargetBounds: the rectangle (in native render-target coordinates)
/// that is currently visible on screen after scaling (useful for anchoring)
/// </summary>
// </summary>
public static Rectangle VisibleRenderTargetBounds { get; set; } = Rectangle.Empty;

/// <summary>
Expand All @@ -30,13 +33,20 @@ public class Globals
public static Rectangle RenderTargetDisplayRect { get; set; } = Rectangle.Empty;

/// <summary>
/// Returns the visible render target bounds if they're not empty.
/// Otherwise, returns the bounds of the original render target.
/// The default Kepler Engine's Gum service
/// </summary>
public static Rectangle GetVisibleRenderTargetBounds() {
public GumService GumUI { get; } = GumService.Default;


/// <summary>
/// Returns the visible render target bounds if they're not empty.
/// Otherwise, returns the bounds of the original rend
{
var visible = Globals.VisibleRenderTargetBounds;
if (visible == Rectangle.Empty)
visible = Globals.RenderTarget.Bounds;
f (visible == Rectangle.Empty)
visible = Globals.RenderTarget.Bounds;

return VisibleRenderTargetBounds == Rectangle.Empty
? RenderTarget.Bounds
Expand All @@ -54,8 +64,8 @@ public enum ScalingMode
Contain,

/// <summary>
/// Fill window, may crop.
/// </summary>
/// Fi
// </summary>
Cover,

/// <summary>
Expand All @@ -70,8 +80,7 @@ public enum ScalingMode

public static MouseInputHandler Mouse { get; set; } = new MouseInputHandler();

public static TouchInputHandler Touch { get; set; } = new TouchInputHandler();

public static TouchInputHandler Touch { get; set; } = new TouchInputHandler
public static SceneManager SceneManager { get; set; } = new SceneManager();

public static GameTime UpdateTime { get; set; }
Expand All @@ -93,7 +102,6 @@ public static void Update(GameTime gameTime)
Keyboard.Update();
Mouse.Update();
Touch.Update();

SceneManager.GetCurrentScene().Update();

OnUpdate(gameTime);
Expand All @@ -102,12 +110,12 @@ public static void Update(GameTime gameTime)
public static void Draw(GameTime gameTime)
{
DrawTime = gameTime;
DeltaTime = (float)DrawTime.ElapsedGameTime.TotalSeconds;
eltaTime = (float)DrawTime.ElapsedGameTime.TotalSeconds;
SceneManager.GetCurrentScene().Draw();

OnRender(gameTime);
}

}
public static Action<GameTime> OnUpdate = (gt) => {};
public static Action<GameTime> OnRender = (gt) => {};
}
}
1 change: 1 addition & 0 deletions KeplerEngine/KeplerEngine.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
<TargetFramework>net8.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Gum.MonoGame" Version="2026.1.12.1" />
<PackageReference Include="MonoGame.Framework.DesktopGL" Version="3.8.*">
<PrivateAssets>All</PrivateAssets>
</PackageReference>
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