Add the LifeCycle::Size event. #953
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luleyleo
approved these changes
May 17, 2020
luleyleo
added
S-waiting-on-author
cmyr
reviewed
May 17, 2020
| pub fn set_layout_rect(&mut self, ctx: &mut LayoutCtx, data: &T, env: &Env, layout_rect: Rect) { | ||
| let mut needs_merge = false; | ||
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| let old_size = self.state.layout_rect.map(|r| r.size()); |
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surprised clippy didn't want .map(Rect::size).
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| let old_size = self.state.layout_rect.map(|r| r.size()); | ||
| let new_size = layout_rect.size(); | ||
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| self.state.layout_rect = Some(layout_rect); |
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this feels like an opportunity for Option::replace, maybe.
| self.state.layout_rect = Some(layout_rect); | ||
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| if old_size.is_none() || old_size.unwrap() != new_size { |
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and I'd have written this as if old_size != Some(new_size), probably
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There have been several occurrences now where a widget would like to know when its size changes and do some non-layout work. This was disccused in zulip and this would also help solve an animation issue with the
Scrollwidget as explained in #834.Thus this PR adds the
LifeCycle::Sizeevent which gets sent every time the size of the widget changes.