0.5.1: a hovered row, and a tree that says which rows it drew - #87
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A folding tree that is driven by the mouse needs two things the widgets did not offer. A click on a scrolled tree has to be turned back into a node, and only the tree knows where its window starts, so `tree` now takes the same `onRow(node, index, y)` the table has had. And a pointer needs a visible target before anything is pressed, so table, list and tree take `hovered`, drawn a shade lighter than the background and always losing to the selection, with `onHoverRow` on every scrollable widget to feed it. The widget only hears the pointer while it is inside, so the book shows the two-line `mouse` listener that clears the hover when a move goes unclaimed. The tree also gained the `scrollbar` the list and table already had, and the test screen gained `hover(x, y)`. Nothing renders differently unless `hovered` is set, so the port fixtures do not move. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DWtLsmAescX4Nb8QiBJd37
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treetakesonRow(node, index, y)like the table, so a click on a scrolled tree can be mapped back to a node. Table, list and tree takehovered, drawn a shade lighter and always losing to the selection, and every scrollable widget takesonHoverRowto feed it. The tree also gainedscrollbar, and the test screenhover(x, y).Nothing renders differently unless
hoveredis set, so the port fixtures do not move. Version bump to 0.5.1.Needed by DiskPush's TUI, whose panes are becoming a folding tree driven by single clicks with a hover highlight.
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https://claude.ai/code/session_01DWtLsmAescX4Nb8QiBJd37