Trait ExpandGesture 

pub trait ExpandGesture: 'static {
    // Required method
    fn edit(&self, context: &ExpandGestureContext) -> Option<ExpandEdit>;
}

Which press expands or collapses a group caption or a tree row. Called once per press on such a line, on the UI thread, after the ContextMenuGesture. A press on a caption still focuses it; a press on a tree row’s chevron leaves the focus and the selection as they are, as Finder’s disclosure triangle does; a press on a chevron is never a click. The keys (ExpandRow, CollapseRow, ←/→ on a caption) expand whatever it says.

The default is StandardExpandGesture. Others are plausible: a single press on a caption toggles (Syncfusion); a double click on a caption confirms instead; no double click at all.

Required Methods

fn edit(&self, context: &ExpandGestureContext) -> Option<ExpandEdit>

The edit the press makes, if any.

Implementors

impl ExpandGesture for StandardExpandGesture