85 lines
1.6 KiB
Go
85 lines
1.6 KiB
Go
package elements
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import (
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"context"
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"github.com/hajimehoshi/ebiten/v2"
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)
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type MouseState struct {
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X, Y int32
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LeftDown, RightDown bool
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LeftChanged, RightChanged bool
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}
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const (
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ContainerKey = "container"
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ZeroKey = "zero"
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)
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type Clickable interface {
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Element
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HandleClick(ctx context.Context, s MouseState) error
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}
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type Mouseable interface {
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Element
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HandleMouseEnter(s MouseState) error
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HandleMouseLeave(s MouseState) error
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HandleMouseMove(s MouseState) error
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HandleMouseDown(s MouseState) error
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HandleMouseUp(s MouseState) error
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}
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type Element interface {
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Draw(ctx context.Context, image *ebiten.Image) error
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}
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func GetZero(ctx context.Context) (x, y float32) {
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if v, ok := ctx.Value(ZeroKey).([2]float32); ok {
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return v[0], v[1]
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}
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return 0, 0
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}
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func GetContainerSize(ctx context.Context) (w, h float32) {
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if s, ok := ctx.Value(ContainerKey).([2]float32); ok {
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return s[0], s[1]
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}
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return 0, 0
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}
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type mouseHandler struct {
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mouseState MouseState
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prevMouseState MouseState
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}
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func (b *mouseHandler) HandleMouseEnter(s MouseState) error {
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b.mouseState = s
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return nil
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}
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func (b *mouseHandler) HandleMouseLeave(s MouseState) error {
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b.prevMouseState = b.mouseState
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b.mouseState = MouseState{}
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return nil
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}
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func (b *mouseHandler) HandleMouseMove(s MouseState) error {
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b.prevMouseState = b.mouseState
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b.mouseState = s
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return nil
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}
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func (b *mouseHandler) HandleMouseDown(s MouseState) error {
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b.prevMouseState = b.mouseState
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b.mouseState = s
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return nil
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}
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func (b *mouseHandler) HandleMouseUp(s MouseState) error {
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b.prevMouseState = b.mouseState
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b.mouseState = s
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return nil
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}
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