intermediate commit

Implement actions and multiple ui widgets

1 files changed, 53 insertions, 0 deletions

diff --git a/go/ui/button.go b/go/ui/button.go
new file mode 100644
index 00000000..93180204
--- /dev/null
+++ b/go/ui/button.go
@@ -0,0 +1,53 @@
+package ui
+
+import (
+	"image/color"
+
+	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
+	"github.com/hajimehoshi/ebiten/v2/text"
+)
+
+type Button interface {
+	Widget
+	Contains(x, y int) bool
+	Click(x, y int)
+}
+
+type SimpleButton struct {
+	X, Y          int
+	Width, Height int
+	img           *ebiten.Image
+	OnClick       func(b *SimpleButton)
+}
+
+func NewSimpleButton(x, y, w, h int, onClick func(b *SimpleButton), label string) *SimpleButton {
+	img := ebiten.NewImage(w, h)
+
+	// b := text.BoundString(f, label)
+	ebitenutil.DrawRect(img, float64(0), float64(0), float64(w), float64(h), gray)
+	text.Draw(img, label, Font, 20, 25, color.White)
+
+	return &SimpleButton{x, y, w, h, img, onClick}
+}
+
+func (b *SimpleButton) Draw(screen *ebiten.Image) {
+	op := &ebiten.DrawImageOptions{}
+	op.GeoM.Translate(float64(b.X), float64(b.Y))
+	screen.DrawImage(b.img, op)
+}
+
+func (b *SimpleButton) Click(x, y int) {
+	b.OnClick(b)
+}
+
+func (b *SimpleButton) Contains(x, y int) bool {
+	return x >= b.X && x <= b.X+b.Width && y >= b.Y && y <= b.Y+b.Height
+}
+
+func (b *SimpleButton) FindObjectAt(x, y int) interface{} {
+	if b.Contains(x, y) {
+		return b
+	}
+	return nil
+}