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feat(D.2b): anchor layout — vital bars stretch with window; drop Vitals heading

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Add AnchorEdges [Flags] enum and Anchors property (default Left|Top, so
all existing elements are unchanged) to UiElement. ApplyAnchor() captures
the design-time margins on first call then recomputes Left/Top/Width/Height
each frame; DrawSelfAndChildren drives it for every child before painting.
ComputeAnchoredRect is public + static so it can be unit-tested without a
running frame loop.

MarkupDocument.Build gains a private Anchor() CSV parser and threads it
into the <meter> initializer via the anchor= attribute.

vitals.xml: remove title="Vitals" (retail vitals has no heading) and add
anchor="left,top,right" to all three meter bars so they stretch when the
panel is dragged wider.

Two new xUnit tests in UiRootInputTests: Left+Right stretches width;
Left+Top only keeps fixed size. All 19 App.Tests green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-06-14 18:58:58 +02:00
parent af91b8432a
commit f911b5f0af
4 changed files with 102 additions and 4 deletions
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21
tests/AcDream.App.Tests/UI/UiRootInputTests.cs
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@ -112,4 +112,25 @@ public class UiRootInputTests
// bottom edge masked out (Y locked)
Assert.True((UiRoot.HitEdges(panel, 200, 200, 5) & ResizeEdges.Bottom) == 0);
}
[Fact]
public void ComputeAnchoredRect_LeftRight_StretchesWidth()
{
// bar at x=8,w=200 in a 220-wide parent (right margin 12). Parent grows to 300.
var (x, _, w, _) = UiElement.ComputeAnchoredRect(
AnchorEdges.Left | AnchorEdges.Right | AnchorEdges.Top,
mL: 8, mT: 24, mR: 12, mB: 58, w0: 200, h0: 14, parentW: 300, parentH: 96);
Assert.Equal(8f, x);
Assert.Equal(280f, w); // 300 - 12 - 8
}
[Fact]
public void ComputeAnchoredRect_LeftTopOnly_KeepsFixedSizeAndOrigin()
{
var (x, y, w, h) = UiElement.ComputeAnchoredRect(
AnchorEdges.Left | AnchorEdges.Top,
mL: 8, mT: 24, mR: 12, mB: 58, w0: 200, h0: 14, parentW: 300, parentH: 96);
Assert.Equal(8f, x); Assert.Equal(24f, y);
Assert.Equal(200f, w); Assert.Equal(14f, h);
}
}