Module titlebar 

titlebar — the strip a window with no system titlebar moves itself by.

Two platform facts it exists to carry. The window is moved with Window::start_window_move on the first motion after a press, never on the press: a bar that moved on mouse-down would swallow every click on the buttons sitting in it. And the macOS traffic lights need Theme::TRAFFIC_LIGHT_INSET of leading room, which is nothing until the window goes full screen and AppKit takes them away.

The window it belongs to opens with appears_transparent: true and app_owns_titlebar_drag: true — the second one stops AppKit from dragging the window and from delaying titlebar clicks while it waits to see a double-click.

titlebar::titlebar("titlebar", &self.drag, true, window)
    .px(px(8.0))
    .child(/* … */)

Structs

DragState

Whether the press on a titlebar is still a candidate for a window move.

Functions

titlebar

The strip: full width, Theme::TITLEBAR_HEIGHT tall, dragging its window and zooming it on a double click.