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Add LinearLayout::set_focus_index
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@ -207,6 +207,24 @@ impl LinearLayout {
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self.focus
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}
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/// Attemps to set the focus on the given child.
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///
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/// Returns `Err(())` if `index >= self.len()`, or if the view at the
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/// given index does not accept focus.
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pub fn set_focus_index(&mut self, index: usize) -> Result<(), ()> {
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if self
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.children
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.get_mut(index)
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.map(|child| child.view.take_focus(direction::Direction::none()))
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.unwrap_or(false)
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{
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self.focus = index;
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Ok(())
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} else {
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Err(())
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}
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}
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// Invalidate the view, to request a layout next time
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fn invalidate(&mut self) {
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self.cache = None;
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