49 lines
822 B
Go
49 lines
822 B
Go
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package ui
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type ImageFactoryFn func(Context) (Image, error)
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type Images struct {
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Factories map[string]ImageFactoryFn
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Images map[string]Image
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}
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func NewImages() *Images {
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return &Images{map[string]ImageFactoryFn{}, map[string]Image{}}
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}
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func (i *Images) AddFactory(name string, fn ImageFactoryFn) {
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i.Factories[name] = fn
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}
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func (i *Images) AddImage(name string, im Image) {
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curr := i.Images[name]
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if curr != nil {
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curr.Destroy()
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}
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i.Images[name] = im
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}
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func (i *Images) Destroy() {
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for _, im := range i.Images {
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im.Destroy()
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}
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i.Images = nil
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}
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func (i *Images) Image(ctx Context, name string) Image {
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im, ok := i.Images[name]
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if ok {
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return im
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}
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fact, ok := i.Factories[name]
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if !ok {
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return nil
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}
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im, err := fact(ctx)
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if err != nil {
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return nil
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}
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i.Images[name] = im
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return im
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}
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