v0.1.19

A pane names the room its scrollbar sits in, fields hold a case, and nested panes keep the wheel.

New

• Overlay::channel centres a bar in room the pane reserves beside its content, in place of the strip at the edge; scroll::rail_fits says whether a hand-rolled rail has the room to paint.
• A text field holds its text in a Case: with_case, set_case and case, applied to every edit rather than to the string on its way out, so what is painted and what content() returns are one string.
• scroll::claiming_pane and scroll::contain_wheel keep a capped pane's wheel to itself, and floating::layer gives a floating surface a layer of its own.

Changed

• scroll::BAR_INSET and scroll::RAIL_ROOM are no longer public: a pane names where its bar sits through Overlay::channel, and scroll::rail_fits answers what RAIL_ROOM was read for.

Fixed

• A nested pane scrolled past its end no longer carries the wheel into the pane behind it.
• A floating layer occludes what sits under it, and the press that dismisses a menu or popover is swallowed rather than reaching the content behind.