etk/button.go

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Go
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2022-06-08 23:35:42 +00:00
package etk
import (
"image"
"image/color"
"log"
"code.rocketnine.space/tslocum/messeji"
"github.com/hajimehoshi/ebiten/v2/examples/resources/fonts"
"golang.org/x/image/font"
"golang.org/x/image/font/opentype"
"github.com/hajimehoshi/ebiten/v2"
)
// TODO
var mplusNormalFont font.Face
func init() {
tt, err := opentype.Parse(fonts.MPlus1pRegular_ttf)
if err != nil {
log.Fatal(err)
}
const dpi = 72
mplusNormalFont, err = opentype.NewFace(tt, &opentype.FaceOptions{
Size: 32,
DPI: dpi,
Hinting: font.HintingFull,
})
if err != nil {
log.Fatal(err)
}
}
type Button struct {
*Box
label *messeji.TextField
}
func NewButton(label string, onSelected func()) *Button {
textColor := Style.ButtonTextColor
if textColor == nil {
textColor = Style.TextColor
}
l := messeji.NewTextField(mplusNormalFont)
l.SetText(label)
l.SetForegroundColor(textColor)
l.SetBackgroundColor(color.RGBA{0, 0, 0, 0})
l.SetHorizontal(messeji.AlignCenter)
l.SetVertical(messeji.AlignCenter)
return &Button{
Box: NewBox(),
label: l, // TODO
}
}
func (b *Button) SetRect(r image.Rectangle) {
b.Box.rect = r
b.label.SetRect(r)
}
func (b *Button) HandleMouse() (handled bool, err error) {
return false, nil
}
func (b *Button) HandleKeyboard() (handled bool, err error) {
return false, nil
}
func (b *Button) Draw(screen *ebiten.Image) error {
// TODO background color
// Draw background.
screen.SubImage(b.rect).(*ebiten.Image).Fill(Style.ButtonBgColor)
// Draw label.
b.label.Draw(screen)
// Draw border.
const borderSize = 4
screen.SubImage(image.Rect(b.rect.Min.X, b.rect.Min.Y, b.rect.Max.X, b.rect.Min.Y+borderSize)).(*ebiten.Image).Fill(Style.BorderColor)
screen.SubImage(image.Rect(b.rect.Min.X, b.rect.Max.Y-borderSize, b.rect.Max.X, b.rect.Max.Y)).(*ebiten.Image).Fill(Style.BorderColor)
screen.SubImage(image.Rect(b.rect.Min.X, b.rect.Min.Y, b.rect.Min.X+borderSize, b.rect.Max.Y)).(*ebiten.Image).Fill(Style.BorderColor)
screen.SubImage(image.Rect(b.rect.Max.X-borderSize, b.rect.Min.Y, b.rect.Max.X, b.rect.Max.Y)).(*ebiten.Image).Fill(Style.BorderColor)
return nil
}