Canvas clicks now reach the panel UiHost so buttons, tabs, and slots
respond to user interaction. Previously only UiRoot.Pick (inspector
selection) received click events; the panel itself was inert.
Key changes:
- StudioInspector.DrawCanvas now returns a CanvasInputEvent struct
(was nullable click tuple) — carries isHovered, move position,
leftDown/Up, and scroll delta, all in panel-local pixels.
- Coordinate mapping: panel_local = mouse_screen - GetItemRectMin()
(1:1, no scale factor). V-flip (uv0.Y=1, uv1.Y=0) makes screen
top = panel Y=0, so NO extra Y inversion. Documented in comments.
- StudioWindow.OnLoad: removed WireMouse — raw Silk window coords are
offset by the canvas sub-window position and land in the wrong place.
WireKeyboard kept (keyboard input needs no spatial remapping).
- StudioWindow.OnRender: forwards OnMouseMove always (hover states),
plus OnMouseDown/Up/OnScroll in Interact mode. Console.WriteLine
on each forwarded left-click for live verification.
- Interact/Inspect toggle: checkbox in the Studio toolbar (default
Interact). Inspect mode restores old click-to-select-element behavior
while still forwarding OnMouseMove for hover states.
- CanvasCoordMappingTests: 7 pure-math unit tests covering the
origin, interior points, corner, chrome OOB, and the no-extra-flip
invariant (no GL required).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Fix 1 (Selection highlight): StudioInspector.DrawCanvas draws a bright-green
2px outline over Selected using the window draw list. ScreenPosition maps
directly to FBO pixel space; rectMin offsets into screen space.
Fix 2 (In-studio panel picker): DrawToolbar (BeginCombo over ListSlugs output).
StudioWindow resolves _dumpFile once in OnLoad, tracks _currentSlug, and calls
LoadDumpPanel on combo change. LoadDumpPanel removes old root via RemoveChild,
loads new slug, resets Selected. No relaunch needed.
Fix 3 (Fixed layout): All four panes use SetNextWindowPos + SetNextWindowSize
with ImGuiCond.FirstUseEver. Toolbar (0,0 x windowW x 40), tree (0,40 x 280),
canvas (280,40 x centre), props (right-340,40 x 340). User can drag from these.
Build + dotnet test green (609 passed, 0 failed).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Task 3 of the acdream UI Studio plan. The studio previously drew the
panel straight to the window; it now renders the panel into an off-screen
FBO (PanelFbo) and displays it in an ImGui Canvas pane alongside a Tree
pane (recursive element hierarchy, click-to-select) and a Properties pane
(EventId/type/rect/anchors/ZOrder/flags of the selected element).
Click-to-inspect: a left-click inside the Canvas calls UiElement.HitTest
on the panel root (same-assembly internal access) and selects the topmost
element at the cursor, wiring the canvas directly to the tree selection.
PanelFbo lifecycle mirrors PaperdollViewportRenderer (RGBA8 color +
Depth24Stencil8 renderbuffer, GLStateScope-sealed, lazy resize on size
change). V-flip in DrawCanvas (uv0=(0,1)/uv1=(1,0)) corrects GL's
bottom-left FBO origin to ImGui's top-left convention so click Y maps
directly to panel-local Y without inversion.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
