acdream/src/AcDream.App/UI

AcDream.App.UI — Retail-style UI toolkit

This is acdream's retained-mode UI toolkit. It mirrors the behavior of the retail AC client (hit-testing, modal, capture, drag-drop, tooltip delay, focus routing, event type codes) without trying to byte-match the retail binary — because the retail widgets live in keystone.dll, which we don't decompile.

Research

All design decisions in this directory are grounded in the master synthesis + six deep-dive docs under docs/research/retail-ui/:

Document	Topic
00-master-synthesis.md	Cross-slice synthesis + C# port plan
01-architecture-and-init.md	Process entry, window, main loop
02-class-hierarchy.md	CUIManager / CUIListener / CFont / CSurface
03-rendering.md	Font atlas, 2D quad batch, cursor
04-input-events.md	WndProc → Device → widget event routing
05-panels.md	Chat, attributes, spells, paperdoll, inventory
06-hud-and-assets.md	Vital orbs, radar, compass + dat asset catalog

Files

• UiEvent.cs — 24-byte event struct + retail-faithful type constants (0x01 click, 0x15 drag-begin, 0x3E drop, 0x201 WM_LBUTTONDOWN, …)
• UiElement.cs — base widget with OnDraw / OnEvent / OnHitTest / OnTick virtuals, children list, ZOrder, focus/capture flags
• UiPanel.cs — UiPanel (rect + optional bg/border), UiLabel, UiButton
• UiRenderContext.cs — per-frame draw context with translate stack
• UiRoot.cs — top-of-tree + "Device" responsibilities (mouse/keyboard state, focus, modal, capture, drag-drop, tooltip timer). Mirrors the retail DAT_00837ff4 Device object's vtable.
• UiHost.cs — one-shot wrapper: owns the UiRoot, a TextRenderer, and a default BitmapFont. Provides WireMouse / WireKeyboard helpers for Silk.NET plumbing.

Integration pattern

// GameWindow.OnLoad
_uiHost = new UiHost(_gl!, shadersDir, _debugFont);
_uiHost.Root.WorldMouseFallThrough += (btn, x, y, flags) => HandleWorldClick(btn, x, y, flags);
_uiHost.Root.WorldKeyFallThrough   += (vk, lp) => HandleHotkey(vk);
foreach (var mouse in _input.Mice) _uiHost.WireMouse(mouse);
foreach (var kb in _input.Keyboards) _uiHost.WireKeyboard(kb);

// Add panels
var chat = new Panels.ChatWindow { Left = 10, Top = 400, Width = 500, Height = 250 };
_uiHost.Root.AddChild(chat);

// GameWindow.OnRender — after the 3D scene
_uiHost.Tick(deltaSeconds);
_uiHost.Draw(new Vector2(_window!.Size.X, _window.Size.Y));

What's scaffolded vs what still needs building

Shipped in the scaffold (this session)

• UI tree + event routing + focus + modal + capture + drag-drop
• Hit-testing (children-first, Z-order tie-break)
• Tooltip timer (~1000ms)
• Hover enter/leave, click vs right-click, scroll, keyboard
• World fall-through so existing camera/player controls still work
• Simple text/rect drawing through the existing BitmapFont + TextRenderer pipeline

To build next

1. AcFont + FontCache — load Font DBObjs from portal.dat range 0x40000000..0x40000FFF, bake 256×256 glyph atlas from the referenced RenderSurface (0x06xxxxxx). See slice 03 §4.
2. Dat sprite loader — decode RenderSurface dats as GL textures; add DrawSprite(uint datId, Rectangle dest, uint rgba) to UiRenderContext.
3. CursorManager — OS cursor + dat-sourced custom cursors via slice 03 §7.
4. Scissor clipping — for panels with scrollable interiors (chat, inventory grid). GL_SCISSOR_TEST wrapped in UiRenderContext.PushScissor / PopScissor.
5. First concrete panel — ChatWindow since we have all 6 wire messages parsed already. See slice 05 §1.
6. Vital orbs HUD once the server sends GameMessagePrivateUpdateVital. See slice 06 A.1.

Retail magic numbers the scaffold preserves

Because hand-ported panel code will copy the retail switch-case structure, we keep the magic constants:

// Event types
UiEventType.Click          == 0x01   // chunk_00470000.c ~11140
UiEventType.Tooltip        == 0x07   // chunk_00460000.c ~6253 (~1000ms delay)
UiEventType.DragBegin      == 0x15   // chunk_004A0000.c ~2707
UiEventType.DragEnter      == 0x21   // chunk_004A0000.c ~2714
UiEventType.DragOver       == 0x1C   // chunk_004A0000.c ~2723
UiEventType.DropReleased   == 0x3E   // chunk_004A0000.c ~2754
UiEventType.MouseDown      == 0x201  // WM_LBUTTONDOWN
UiEventType.MouseUp        == 0x202  // WM_LBUTTONUP

// Event IDs
// Widget event IDs live in the 0x10000000+ range (retail convention).
// UiRoot auto-assigns EventIds starting at 0x10000001.