zntg/ui/visual.go

package ui

import (
	"image/color"

	"opslag.de/schobers/geom"
)

func Background(content Control, c color.Color) Control {
	return &background{Proxy: Proxy{Content: content}, Background: c}
}

type background struct {
	Proxy

	Background color.Color
}

func (b *background) Render(ctx Context) {
	bounds := b.Proxy.Bounds()
	if b.Background != nil {
		ctx.Renderer().FillRectangle(bounds, b.Background)
	}
	b.Proxy.Render(ctx)
}

func Shadow(content Control) *shadow {
	s := &shadow{}
	s.Content = content
	return s
}

type shadow struct {
	Proxy
}

func (s *shadow) Render(ctx Context) {
	s.Proxy.Render(ctx)
	b := s.Bounds()
	shadow := RGBA(0xBD, 0xBD, 0xBD, 0x2F)
	ctx.Renderer().FillRectangle(geom.RectF32(b.Min.X, b.Min.Y, b.Max.X, b.Min.Y+3), shadow)
	ctx.Renderer().FillRectangle(geom.RectF32(b.Min.X, b.Min.Y, b.Max.X, b.Min.Y+2), shadow)
	ctx.Renderer().FillRectangle(geom.RectF32(b.Min.X, b.Min.Y, b.Max.X, b.Min.Y+1), shadow)
}