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RenderSliverHelpers

inset_rendering

Trait RenderSliverHelpers 

Source 
pub trait RenderSliverHelpers: RenderSliver {
    // Provided methods
    fn hit_test_box_child(
        self: RenderHandle<Self>,
        app: &mut App,
        result: &mut BoxHitTestResult<'_>,
        child: AnyRenderBox,
        main_axis_position: f64,
        cross_axis_position: f64,
    ) -> bool { ... }
    fn apply_paint_transform_for_box_child(
        self: RenderHandle<Self>,
        app: &App,
        child: AnyRenderBox,
        transform: &mut Matrix4,
    ) { ... }
}
Expand description

Mixin for RenderSliver subclasses that provides some utility functions.

Provided Methods§

Source

fn hit_test_box_child( self: RenderHandle<Self>, app: &mut App, result: &mut BoxHitTestResult<'_>, child: AnyRenderBox, main_axis_position: f64, cross_axis_position: f64, ) -> bool

Utility function for RenderSliver::hit_test_children for use when the children are crate::RenderBox widgets.

This function takes care of converting the position from the sliver coordinate system to the Cartesian coordinate system used by the box protocol.

This function relies on RenderSliver::child_main_axis_position to determine the position of the child in question.

Calling this for a child that is not visible is not valid.

Source

fn apply_paint_transform_for_box_child( self: RenderHandle<Self>, app: &App, child: AnyRenderBox, transform: &mut Matrix4, )

Utility function for RenderObject::apply_paint_transform for use when the children are crate::RenderBox widgets.

This function turns the value returned by RenderSliver::child_main_axis_position and RenderSliver::child_cross_axis_position for the child in question into a translation that it then applies to the given matrix.

Calling this for a child that is not visible is not valid.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§