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package ui
import (
"github.com/hajimehoshi/ebiten/v2"
)
type Widget interface {
Draw(*ebiten.Image)
FindObjectAt(int, int) any
Contains(int, int) bool
Layout() (int, int)
IsClickable() bool
Click(int, int)
IsHoverable() bool
Hover(bool, int, int)
IsScrollable() bool
Scroll(int, int)
IsUpdatable() bool
Update() error
IsFocusable() bool
Focus(bool)
}
type WidgetBase struct {
X, Y int
Width, Height int
img *ebiten.Image
Op *ebiten.DrawImageOptions
renderImpl func() *ebiten.Image
EventHandlersMap
}
func NewWidgetBase(x, y, width, height int) WidgetBase {
return WidgetBase{X: x, Y: y, Width: width, Height: height, Op: &ebiten.DrawImageOptions{}, EventHandlersMap: NewEventHandlersMap()}
}
func (w *WidgetBase) Draw(screen *ebiten.Image) {
if w.img == nil {
w.img = w.renderImpl()
}
op := &ebiten.DrawImageOptions{}
op.GeoM.Concat(w.Op.GeoM)
op.GeoM.Translate(float64(w.X), float64(w.Y))
screen.DrawImage(w.img, op)
}
func (w *WidgetBase) DrawImageOptions() *ebiten.DrawImageOptions {
return w.Op
}
func (w *WidgetBase) ForceRedraw() {
w.img = nil
}
func (w *WidgetBase) Contains(x, y int) bool {
return x >= 0 && y >= 0 && x >= w.X && x <= w.X+w.Width && y >= w.Y && y <= w.Y+w.Height
}
func (w *WidgetBase) FindObjectAt(int, int) any {
return nil
}
func (w *WidgetBase) Layout() (int, int) {
return w.Width, w.Height
}
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