[−][src]Trait pushrod::render::layout::Layout

pub trait Layout {
    fn add_widget(&mut self, _widget_id: i32, _widget_position: LayoutPosition);

    fn set_padding(&mut self, padding: PaddingConstraint);

    fn get_padding(&self) -> PaddingConstraint;

    fn do_layout(&mut self, _widgets: &[WidgetContainer]);

    fn needs_layout(&self) -> bool;
}

This is a Layout trait that is used by the Engine service, which stores a list of Widgets, their positions (based on matrix coordinates), and an entry point to trigger the layout compute action.

Required methods

fn add_widget(&mut self, _widget_id: i32, _widget_position: LayoutPosition)

Adds a Widget by ID to the Layout manager, given its LayoutPosition, as a position marker in the manager.

fn set_padding(&mut self, padding: PaddingConstraint)

Changes the PaddingConstraint for this Layout.

fn get_padding(&self) -> PaddingConstraint

Retrieves the current PaddingConstraint.

fn do_layout(&mut self, _widgets: &[WidgetContainer])

Performs a layout, applying the WidgetContainer list at the time, so that referenced Widgets can be adjusted as necessary.

fn needs_layout(&self) -> bool

Indicates whether or not the Layout needs to have do_layout re-run. This is generally needed when the LayoutPosition changes, or when PaddingConstraints change.

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Implementors

impl Layout for HorizontalLayout[src]

This is the Layout implementation for the HorizontalLayout manager. This Layout manager will not reposition any objects within the bounds of the Layout until at least 2 objects have been added to the bounds of the Layout.

fn add_widget(&mut self, widget_id: i32, widget_position: LayoutPosition)[src]

Adds a widget to the HorizontalLayout managed stack.

fn do_layout(&mut self, _widgets: &[WidgetContainer])[src]

Adjusts the layout of the Widgets managed by this Layout manager. Currently only obeys the spacing in the object. The rest of the padding is not (yet) honored.

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