ui::RadialGradientBrush¶

Header: winui/render/Brush.hpp.

A radial gradient. The defaults: an ellipse centered on the box with radii of half its size, the gradient starting at the center. gradient_origin is a point in the same space as center, not an offset from it.

Example:

auto rect = std::make_unique<ui::RectangleControl>();
rect->set_fill(ui::RadialGradientBrush{
    .stops  = {{0.0f, ui::Color::from_rgba(255, 255, 0)}, {1.0f, ui::Color::from_rgba(0, 0, 255)}},
    .center = ui::Point{0.25f, 0.25f},
});

Field	Type	Default
`stops`	`GradientStops`		The color stops, from `gradient_origin` (offset 0) out to the ellipse's edge (offset 1).
`center`	`Point`	`{0.5f, 0.5f}`	Center of the outer ellipse, in the space `mapping_mode` picks.
`radius_x`	`float`	`0.5f`	Horizontal radius of the outer ellipse, in the space `mapping_mode` picks.
`radius_y`	`float`	`0.5f`	Vertical radius of the outer ellipse, in the space `mapping_mode` picks.
`gradient_origin`	`Point`	`{0.5f, 0.5f}`	Where offset 0 sits; moving it off `center` gives an off-center highlight.
`mapping_mode`	`BrushMappingMode`	`BrushMappingMode::RelativeToBoundingBox`	Whether the points and radii above are box fractions or DIPs.
`spread_method`	`GradientSpreadMethod`	`GradientSpreadMethod::Pad`	What is painted outside the outer ellipse.