holy shit components are rendering whaaaaaaaaaaaaaaaat

common/elements/v1/stacks/options.go

@@ -0,0 +1,26 @@
+package stacks
+
+import (
+	"git.vezzani.net/ben/games/common/elements/v1"
+	"git.vezzani.net/ben/games/common/elements/v1/blocks"
+)
+
+type Option func(*Stack)
+
+func BlockOpt(o blocks.Option) Option {
+	return func(s *Stack) {
+		o(&s.Block)
+	}
+}
+
+func Children(children ...elements.ElementFunc) Option {
+	return func(s *Stack) {
+		s.children = children
+	}
+}
+
+func Horizontal() Option {
+	return func(s *Stack) {
+		s.horizontal = true
+	}
+}

common/elements/v1/stacks/stack.go

@@ -0,0 +1,51 @@
+package stacks
+
+import (
+	"git.vezzani.net/ben/games/common/elements/v1"
+	"git.vezzani.net/ben/games/common/elements/v1/blocks"
+	"git.vezzani.net/ben/games/common/elements/v1/mouse"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+func New(ops ...Option) elements.ElementFunc {
+	return func(d elements.Bounds) elements.Element {
+		s := Stack{
+			Block: blocks.Block{ContainerBounds: d},
+		}
+		for op := range ops {
+			ops[op](&s)
+		}
+		return &s
+	}
+}
+
+type Stack struct {
+	blocks.Block
+	mouse.NopHandler
+	horizontal bool
+	children   []elements.ElementFunc
+}
+
+func (s *Stack) Draw(image *ebiten.Image) (w, h float64) {
+	s.Block.Draw(image)
+
+	d := s.ContainerBounds
+	d.Width, d.Height = s.Block.Size()
+	if s.horizontal {
+		d.Width /= float64(len(s.children))
+	} else {
+		d.Height /= float64(len(s.children))
+	}
+
+	var offsetX, offsetY float64
+	for i := range s.children {
+		offsetX, offsetY = s.children[i](d).Draw(image)
+		if s.horizontal {
+			d.Min.X += offsetX
+		} else {
+			d.Min.Y += offsetY
+		}
+	}
+	return s.Block.Size()
+}