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Focus-chain update #1724

Merged
merged 8 commits into from
Apr 19, 2021
Merged

Focus-chain update #1724

merged 8 commits into from
Apr 19, 2021

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xarvic
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@xarvic xarvic commented Apr 17, 2021

This is a fix of the part of #1716 @cmyr and i agreed on:

  • should_propagate_to_hidden() now returns false for Lifecycle::BuildFocusChain
  • Lifecycle::BuildFocusChain requests a a resign of focus if state.has_focus is set but neither one of its hidden children nor it self has focus.

The other point: What should happen if try to focus a WidgetID which is not allowed to recieve focus like ctx.set_focus(WidgetID::new()) or focusing a hidden widget is not addressed here.

xarvic and others added 6 commits April 7, 2021 16:00
…o hidden widgets anymore.

Signed-off-by: xarvic <xarvix@web.de>
Signed-off-by: xarvic <xarvix@web.de>
Signed-off-by: xarvic <xarvix@web.de>
@xarvic xarvic changed the title Focus chain update Focus-chain update Apr 17, 2021
@xarvic xarvic added the S-needs-review waits for review label Apr 17, 2021
@xarvic xarvic requested a review from cmyr April 17, 2021 15:54
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@cmyr cmyr left a comment

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I'm a bit confused here, and will need to take a second look (or maybe we should have a quick chat about it) I'm having a slow time remembering the context for this. In any case, one question inline.

druid/src/core.rs Outdated Show resolved Hide resolved
// currently focused is not part of the functional tree anymore
// (Lifecycle::BuildFocusChain.should_propagate_to_hidden() is false!) and should
// resign the focus.
if had_focus && !self.state.has_focus {
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I'm confused; we haven't done merge_up yet, so how would has_focus have changed?

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The merge_up of our children happened already in line 1058 / 1062. If someone hides a focused widget and then calls children_changed(), we clear has_focus in BuildFocusChain if has_clear is not set after the calls in 1058 and 1062 we know, that the focused widget is not reachable

Co-authored-by: Colin Rofls <colin@cmyr.net>
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Okay, that explanation works for me, thanks!

@xarvic xarvic merged commit 452328c into linebender:master Apr 19, 2021
@xarvic xarvic deleted the focus-chain-update branch April 19, 2021 18:05
@maan2003 maan2003 removed the S-needs-review waits for review label May 3, 2021
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3 participants