scrolling: Extract tab_indicator_area()

This commit is contained in:
Ivan Molodetskikh
2025-02-10 13:10:36 +03:00
parent a21196ec54
commit 96a3ded2ec
+29 -25
View File
@@ -3470,30 +3470,6 @@ impl<W: LayoutElement> Column<W> {
tile.update_render_elements(is_active, tile_view_rect);
}
// We'd like to use the active tile's animated size for the tab indicator, however we need
// to be mindful of the case where the active tile is smaller than some other tile in the
// column. The column assumes the size of the largest tile.
//
// We expect users to mainly resize tabbed columns by width, so matching the animated size
// is more important here. Besides, we always try to resize all windows in a column to the
// same width when possible, and also the animation for going into tabbed mode doesn't move
// tiles horizontally as much.
//
// For height though, it's a different story. First, users probably aren't resizing a
// tabbed column by height. Second, we don't match windows by height, so it's easy to have
// a smaller active tile than the rest of the column, e.g. by adding a fixed-size dialog.
// Then, switching to that dialog and back should ideally keep the tab indicator position
// fixed. Third, the animation for making a column tabbed moves tiles vertically, and using
// the active tile's animated size in this case only works for the topmost tile, and looks
// broken otherwise.
let mut max_height = 0.;
for tile in &self.tiles {
max_height = f64::max(max_height, tile.tile_size().h);
}
let tile = &self.tiles[active_idx];
let area_size = Size::from((tile.animated_tile_size().w, max_height));
let config = self.tab_indicator.config();
let offsets = self.tile_offsets_iter(self.data.iter().copied());
let tabs = zip(&self.tiles, offsets)
@@ -3512,7 +3488,7 @@ impl<W: LayoutElement> Column<W> {
self.tab_indicator.update_render_elements(
enabled,
Rectangle::new(self.tiles_origin(), area_size),
self.tab_indicator_area(),
view_rect,
self.tiles.len(),
tabs,
@@ -4506,6 +4482,34 @@ impl<W: LayoutElement> Column<W> {
zip(tiles, offsets)
}
fn tab_indicator_area(&self) -> Rectangle<f64, Logical> {
// We'd like to use the active tile's animated size for the tab indicator, however we need
// to be mindful of the case where the active tile is smaller than some other tile in the
// column. The column assumes the size of the largest tile.
//
// We expect users to mainly resize tabbed columns by width, so matching the animated size
// is more important here. Besides, we always try to resize all windows in a column to the
// same width when possible, and also the animation for going into tabbed mode doesn't move
// tiles horizontally as much.
//
// For height though, it's a different story. First, users probably aren't resizing a
// tabbed column by height. Second, we don't match windows by height, so it's easy to have
// a smaller active tile than the rest of the column, e.g. by adding a fixed-size dialog.
// Then, switching to that dialog and back should ideally keep the tab indicator position
// fixed. Third, the animation for making a column tabbed moves tiles vertically, and using
// the active tile's animated size in this case only works for the topmost tile, and looks
// broken otherwise.
let mut max_height = 0.;
for tile in &self.tiles {
max_height = f64::max(max_height, tile.tile_size().h);
}
let tile = &self.tiles[self.active_tile_idx];
let area_size = Size::from((tile.animated_tile_size().w, max_height));
Rectangle::new(self.tiles_origin(), area_size)
}
#[cfg(test)]
fn verify_invariants(&self) {
assert!(!self.tiles.is_empty(), "columns can't be empty");