a7dbce3474
Second piece of Phase D.2a: the ImGui-specific backend that implements
AcDream.UI.Abstractions' IPanelRenderer / IPanelHost. No GameWindow
hookup yet — compiles standalone for clean review before integration.
Packages:
* Hexa.NET.ImGui 2.2.9 (auto-generated from cimgui 1.92.2b)
* Hexa.NET.ImGui.Backends 1.0.18 (consolidated — OpenGL3 is here)
* Silk.NET.Input 2.23.0 + Silk.NET.OpenGL 2.23.0 (matches AcDream.App)
Files:
ImGuiBootstrapper.cs
One-shot static Initialize(glslVersion) / Shutdown() pair. Creates
the ImGui context, applies dark style, enables NavEnableKeyboard,
and boots ImGuiImplOpenGL3. Re-init is a no-op.
SilkInputBridge.cs
Event-driven Silk.NET -> ImGui IO bridge. Subscribes on construction;
Dispose() unsubscribes. Covers:
- KeyDown/Up -> ImGui.AddKeyEvent with modifier latching
(Ctrl/Shift/Alt/Super routed via both ModXxx flags AND named
key events so both IsKeyPressed checks and ImGui shortcut
matching work)
- KeyChar -> AddInputCharacter for text fields
- MouseMove -> AddMousePosEvent
- MouseDown/Up -> AddMouseButtonEvent (L=0, R=1, M=2)
- Scroll -> AddMouseWheelEvent (both axes)
Silk.NET.Input.Key -> ImGuiKey map covers WASD, arrows, modifiers,
letters, digits, function keys. Unmapped keys silently ignored.
BeginFrame(displaySize, dt) sets IO.DisplaySize + IO.DeltaTime.
ImGuiPanelRenderer.cs
IPanelRenderer impl — one-line wrappers on ImGui.Begin/End,
TextUnformatted, SameLine, Separator, ProgressBar. The ONLY place
Hexa.NET.ImGui types appear outside bootstrap/input plumbing. Panels
still never import ImGui.
ImGuiPanelHost.cs
IPanelHost impl. Dictionary keyed by IPanel.Id for idempotent
Register. RenderAll iterates visible panels and calls their Render.
Does NOT call ImGui.NewFrame / ImGui.Render — ownership belongs to
the caller (GameWindow) so GL state is explicit. Diagnostic `Count`
property.
No behavior change yet; next commit wires this into GameWindow behind
ACDREAM_DEVTOOLS=1 and ships the first visible VitalsPanel.
46 lines
1.5 KiB
C#
46 lines
1.5 KiB
C#
using AcDream.UI.Abstractions;
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namespace AcDream.UI.ImGui;
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/// <summary>
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/// <see cref="IPanelHost"/> implementation for the ImGui backend. Owns the
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/// registered panel set; iterates + draws every frame when the caller is
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/// inside an ImGui frame (between <c>ImGui.NewFrame</c> and
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/// <c>ImGui.Render</c>).
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///
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/// <para>
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/// <b>This class does not call <c>ImGui.NewFrame</c> / <c>ImGui.Render</c>
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/// itself.</b> Those belong to the caller (GameWindow) so GL-state
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/// ownership is explicit and the render-loop integration point is obvious.
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/// </para>
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/// </summary>
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public sealed class ImGuiPanelHost : IPanelHost
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{
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private readonly Dictionary<string, IPanel> _panels = new();
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private readonly ImGuiPanelRenderer _renderer = new();
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/// <inheritdoc />
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public void Register(IPanel panel)
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{
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ArgumentNullException.ThrowIfNull(panel);
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_panels[panel.Id] = panel; // idempotent by Id
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}
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/// <inheritdoc />
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public void Unregister(string panelId) => _panels.Remove(panelId);
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/// <inheritdoc />
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public void RenderAll(PanelContext ctx)
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{
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// Order-independent — ImGui windows stack in the order they're drawn
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// for focus purposes but we have <=1 panel in D.2a.
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foreach (var panel in _panels.Values)
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{
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if (!panel.IsVisible) continue;
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panel.Render(ctx, _renderer);
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}
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}
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/// <summary>Current registered count (for diagnostics).</summary>
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public int Count => _panels.Count;
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}
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