Leonid PershinandClaude Fable 5
af319d1276
scene.UseUI() creates a per-scene Myra Desktop and registers UiRenderSystem last in the draw phase (UI on top, window pixels). GameHost now exposes itself as a Game service (Myra needs the instance; useful for games too). Myra was picked over Gum/ImGui for the FontStashSharp ecosystem fit, pipeline-free assets and maturity; its internal SpriteBatch use is a documented exception to the engine rule. Sample: on-screen HUD replaces window-title-only stats — live FPS label, music volume slider and scene-switch buttons on both scenes. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
50 lines
1.7 KiB
C#
50 lines
1.7 KiB
C#
using Friflo.Engine.ECS.Systems;
|
|
using Microsoft.Xna.Framework;
|
|
using Myra;
|
|
using Myra.Graphics2D.UI;
|
|
using MrGameEng.Core;
|
|
|
|
namespace MrGameEng.UI;
|
|
|
|
/// <summary>
|
|
/// Draw system rendering the scene's Myra <see cref="Desktop"/>. Must run after the scene's
|
|
/// world rendering (register UI last in the draw phase) — the UI is drawn on top in window
|
|
/// pixels and also processes mouse/keyboard interaction during render.
|
|
/// </summary>
|
|
public sealed class UiRenderSystem : BaseSystem
|
|
{
|
|
private readonly Desktop _desktop;
|
|
|
|
/// <summary>Creates the system for <paramref name="desktop"/>.</summary>
|
|
public UiRenderSystem(Desktop desktop) => _desktop = desktop;
|
|
|
|
/// <inheritdoc />
|
|
protected override void OnUpdateGroup() => _desktop.Render();
|
|
}
|
|
|
|
/// <summary>Wires the UI module (Myra) into a <see cref="Scene"/>.</summary>
|
|
public static class SceneUiExtensions
|
|
{
|
|
private static bool _environmentInitialized;
|
|
|
|
/// <summary>
|
|
/// Creates a Myra <see cref="Desktop"/> for this scene and registers
|
|
/// <see cref="UiRenderSystem"/> in the draw phase. Call from <c>OnLoad</c>
|
|
/// <b>after</b> <c>UseRenderer2D()</c> so the UI draws on top of the world.
|
|
/// Build the UI by assigning <see cref="Desktop.Root"/>.
|
|
/// </summary>
|
|
public static Desktop UseUI(this Scene scene)
|
|
{
|
|
// Геттер MyraEnvironment.Game бросает исключение, пока Game не задан — проверять через ??= нельзя.
|
|
if (!_environmentInitialized)
|
|
{
|
|
MyraEnvironment.Game = scene.Context.Services.Get<Game>();
|
|
_environmentInitialized = true;
|
|
}
|
|
|
|
var desktop = new Desktop();
|
|
scene.DrawSystems.Add(new UiRenderSystem(desktop));
|
|
return desktop;
|
|
}
|
|
}
|