Collapse nested variations #15488
Collapse nested variations #15488
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- Remove the "head" rendered as part of the <lines> element as it doesn't accurately represent where we're branching from - Remove the "tail" that extends past the bottom variation as it's visually unnecessary. This means the height is no longer the same as the parent height, so we need a new <branch> element with variable height. Tested on Firefox & Chrome with inline & column mode in various zoom levels.
The node's "collapse" flag we now treat as a tri-state where "undefined" means to use the default collapse state.
We've added "position: relative" to the <line> elements for styling purposes, but that affects the calculation of the "offsetTop" property. We can instead calculate the offset ourselves.
ui/tree/css/_tree.scss
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| lines.collapsed > * { | ||
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instead of hiding them, can we avoid rendering them altogether? And maybe get some perf gains in deep trees.
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| cont.scrollTop = target.offsetTop - cont.offsetHeight / 2 + target.offsetHeight; | ||
| const targetOffset = target.getBoundingClientRect().y - el.getBoundingClientRect().y; |
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why do we now require 2 calls to getBoundingClientRect?
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I put a note in the "Fix autoscroll offset" commit, let me copy it here:
We've added "position: relative" to the <line> elements for styling purposes, but that affects the calculation of the "offsetTop" property. We can instead calculate the offset ourselves.
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Looking great. |
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Thanks for the heads up. |
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You have to test it better, though. It's buggy. |
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Yes, that's intended. Main lines are not collapsible. And variations expand/collapse as a group, which is certainly debatable but it keeps things simple. |
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This is great! |
Deeply nested variations (in studies etc.) can cause visual clutter that make it difficult to navigate through complex trees.
This PR includes some baseline visual changes to the left-side "branch" to improve clarity (before, after):
On initial load deep variations are now collapsed (depth 3, 5, 7, etc. are collapsed by default). Clicking the + or navigating to the parent move will expand the variations out.
You can also expand or collapse variations from the context menu:
When you do this from the context menu it will operate recursively. So for example if you right-click the first move of the game, it effectively acts as "collapse all" or "expand all". Or you can right-click on a specific variation to just collapse that variation and its siblings.