Hover not recognized right next to Area

[mankinskin]

This is what the container looks like:

    let area = Area::new(menu_id)
        .order(Order::Foreground)
        .fixed_pos(pos)
        .drag_bounds(Rect::EVERYTHING);
    let mut frame = Frame::menu(&style);
    frame.shadow = Default::default();
    area.show(ctx, |ui| {
        frame
            .show(ui, |ui| {
                //style.visuals.widgets.active.bg_fill = Color32::TRANSPARENT;
                style.visuals.widgets.active.bg_stroke = Stroke::none();
                //style.visuals.widgets.hovered.bg_fill = Color32::TRANSPARENT;
                style.visuals.widgets.hovered.bg_stroke = Stroke::none();
                style.visuals.widgets.inactive.bg_fill = Color32::TRANSPARENT;
                style.visuals.widgets.inactive.bg_stroke = Stroke::none();
                ui.set_style(style);
                ui.with_layout(Layout::top_down_justified(Align::LEFT), add_contents)
                    .inner
            })
    })

The same thing happens on master with the menu:

debug on hover also shows that in that area none of the two overlapping widgets are hovered.

I suspect it is something with Context::interact, but I didn't figure it out yet. Any help would be appreciated 👍🏻

required for #543

[mankinskin]

seems to be caused by Context::layer_id_at https://github.com/emilk/egui/blob/master/egui/src/context.rs#L730

[mankinskin]

So the issue is context.options.style.interaction.resize_grab_radius_side which catches the hover in an area designated for dragging the sides of resizable windows. This is used for all Areas though, while it is only necessary for resizable areas.

I am now looking into disabling this extra radius for areas which are not resizable.

[mankinskin]

egui/egui/src/memory.rs

Lines 472 to 488 in 5cef4ff

	pub fn layer_id_at(&self, pos: Pos2, resize_interact_radius_side: f32) -> Option<LayerId> {
	for layer in self.order.iter().rev() {
	if self.is_visible(layer) {
	if let Some(state) = self.areas.get(&layer.id) {
	let mut rect = Rect::from_min_size(state.pos, state.size);
	if state.interactable {
	// Allow us to resize by dragging just outside the window:
	rect = rect.expand(resize_interact_radius_side);
	}
	if rect.contains(pos) {
	return Some(*layer);
	}
	}
	}
	}
	None
	}

one issue with this PR might be, that any non-interactable area can be found as a layer here. Maybe something like a "resizable" property is needed, so there can be interactable, but non-resizable areas. Similar to the "movable" property.