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preview.go
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preview.go
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package mods
import (
"image"
"io"
"os"
"path/filepath"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/canvas"
"fyne.io/fyne/v2/container"
"fyne.io/fyne/v2/dialog"
"fyne.io/fyne/v2/theme"
"fyne.io/fyne/v2/widget"
"github.com/kiamev/moogle-mod-manager/cache"
"github.com/kiamev/moogle-mod-manager/config"
"github.com/kiamev/moogle-mod-manager/ui/state"
"github.com/kiamev/moogle-mod-manager/ui/state/ui"
"golang.org/x/image/webp"
)
type Preview struct {
Url *string `json:"Url,omitempty" xml:"Url,omitempty"`
Local *string `json:"Local,omitempty" xml:"Local,omitempty"`
img *canvas.Image `json:"-" xml:"-"`
}
func (p *Preview) Get() *canvas.Image {
if p == nil {
return nil
}
if p.img == nil {
p.img = p.GetUncachedImage()
}
return p.img
}
func (p *Preview) GetUncachedImage() (img *canvas.Image) {
var (
r fyne.Resource
err error
)
if p.Local != nil {
f := filepath.Join(state.GetBaseDir(), *p.Local)
if _, err = os.Stat(f); err == nil {
r, err = p.loadResourceFromPath(f)
}
}
if r == nil && p.Url != nil {
if r, err = cache.GetImage(*p.Url); err != nil {
r, err = fyne.LoadResourceFromURLString(*p.Url)
}
}
if r == nil || err != nil {
return nil
}
img = canvas.NewImageFromResource(r)
img.SetMinSize(fyne.Size{Width: float32(300), Height: float32(300)})
img.FillMode = canvas.ImageFillContain
return
}
func (p *Preview) loadResourceFromPath(f string) (r fyne.Resource, err error) {
var (
i image.Image
reader io.Reader
)
if r, err = fyne.LoadResourceFromPath(f); err != nil {
if reader, err = os.Open(f); err != nil {
return
}
if i, err = webp.Decode(reader); err != nil {
return
}
canvas.NewImageFromImage(i)
}
return
}
func (p *Preview) GetAsButton(onClick func()) *fyne.Container {
i := p.Get()
if i == nil {
return nil
}
return container.NewMax(i, widget.NewButton("", onClick))
}
func (p *Preview) GetAsEnlargeOnClick() *fyne.Container {
i := p.Get()
if i == nil {
return nil
}
return container.NewBorder(nil, container.NewCenter(widget.NewButton("Enlarge", func() {
d := dialog.NewCustom("", "Close", p.GetUncachedImage(), ui.ActiveWindow())
d.Resize(config.Get().Size())
d.Show()
})), nil, nil, i)
}
func (p *Preview) GetAsImageGallery(index int, previews []*Preview, enlarge bool) *fyne.Container {
var (
c = container.NewMax()
left = widget.NewButtonWithIcon("", theme.NavigateBackIcon(), func() {
index = p.decrementIndex(index, len(previews))
if img := previews[index].GetUncachedImage(); img != nil {
c.Objects = nil
c.Add(img)
} else {
index = p.incrementIndex(index, len(previews))
}
})
right = widget.NewButtonWithIcon("", theme.NavigateNextIcon(), func() {
index = p.incrementIndex(index, len(previews))
if img := previews[index].GetUncachedImage(); img != nil {
c.Objects = nil
c.Add(img)
} else {
index = p.decrementIndex(index, len(previews))
}
})
)
if img := previews[index].GetUncachedImage(); img != nil {
c.Objects = nil
c.Add(img)
}
if enlarge {
bottom := container.NewCenter(widget.NewButton("Enlarge", func() {
d := dialog.NewCustom("", "Close", previews[index].GetAsImageGallery(index, previews, false), ui.ActiveWindow())
d.Resize(config.Get().Size())
d.Show()
}))
return container.NewBorder(nil, bottom, left, right, c)
}
return container.NewBorder(nil, nil, left, right, c)
}
func (p *Preview) incrementIndex(i int, size int) int {
i++
if i == size {
i = 0
}
return i
}
func (p *Preview) decrementIndex(i int, size int) int {
i--
if i < 0 {
i = size - 1
}
return i
}