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package ui
import (
"image/color"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/text/v2"
"github.com/hajimehoshi/ebiten/v2/vector"
"muhq.space/muhqs-game/go/font"
)
type Button interface {
Widget
}
type SimpleButton struct {
WidgetBase
label string
Bg color.Color
Fg color.Color
font *text.GoTextFace
lineSpacing float64
}
func NewSimpleButton(x, y, w, h int, label string, onClick func(b *SimpleButton)) *SimpleButton {
sb := &SimpleButton{NewWidgetBase(x, y, w, h), label, Gray, color.White, font.Font24, 1.5}
sb.EventHandlersMap["click"] = func(int, int) { onClick(sb) }
sb.renderImpl = func() *ebiten.Image {
if sb.img == nil {
sb.img = sb.renderRect()
}
return sb.img
}
return sb
}
// NewRoundSimpleButton creates a circular SimpleButton.
// The shape used for click detection is still a square.
// x and y define the left upper corner of the square (x, y) rect (x+r, y+r).
func NewRoundSimpleButton(x, y, r int, label string, onClick func(b *SimpleButton)) *SimpleButton {
sb := &SimpleButton{NewWidgetBase(x, y, r, r), label, Gray, color.White, font.Font24, 1.5}
sb.EventHandlersMap["click"] = func(int, int) { onClick(sb) }
sb.renderImpl = func() *ebiten.Image {
if sb.img == nil {
sb.img = sb.renderCircle()
}
return sb.img
}
return sb
}
func (b *SimpleButton) drawLabel(img *ebiten.Image) {
w, h := text.Measure(b.label, b.font, b.font.Size*b.lineSpacing)
x := float64(b.Width)/2 - w/2
y := float64(b.Height)/2 - h/2
op := &text.DrawOptions{}
op.GeoM.Translate(x, y)
op.ColorScale.ScaleWithColor(b.Fg)
text.Draw(img, b.label, font.Font24, op)
}
func (b *SimpleButton) renderRect() *ebiten.Image {
img := ebiten.NewImage(b.Width, b.Height)
vector.FillRect(img, float32(0), float32(0), float32(b.Width), float32(b.Height), b.Bg, false)
b.drawLabel(img)
return img
}
func (b *SimpleButton) renderCircle() *ebiten.Image {
img := ebiten.NewImage(b.Width, b.Height)
vector.FillCircle(img, float32(b.Width)/2, float32(b.Height)/2, float32(b.Width/2), b.Bg, false)
b.drawLabel(img)
return img
}
func (b *SimpleButton) UpdateLabel(label string) {
if b.label != label {
b.label = label
b.ForceRedraw()
}
}
type ImageButton struct {
WidgetBase
img *ebiten.Image
}
func NewImageButton(x, y int, img *ebiten.Image, onClick func(b *ImageButton)) *ImageButton {
bounds := img.Bounds()
sb := &ImageButton{NewWidgetBase(x, y, bounds.Dx(), bounds.Dy()), img}
sb.EventHandlersMap["click"] = func(int, int) { onClick(sb) }
sb.renderImpl = func() *ebiten.Image {
return sb.img
}
return sb
}
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