99 lines
2.4 KiB
Go
99 lines
2.4 KiB
Go
package widgets
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import (
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"image"
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"fyne.io/fyne/v2"
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"fyne.io/fyne/v2/canvas"
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"fyne.io/fyne/v2/container"
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"fyne.io/fyne/v2/theme"
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"fyne.io/fyne/v2/widget"
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myTheme "github.com/dweymouth/supersonic/ui/theme"
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)
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// A widget that can display an image or else
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// a placeholder with a rectangular border frame
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// and an icon positioned in the center of the frame.
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type ImagePlaceholder struct {
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ScaleMode canvas.ImageScale
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widget.BaseWidget
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content *fyne.Container
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imageDisp *TappableImage
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image image.Image
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iconImage *canvas.Image
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border *myTheme.ThemedRectangle
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minSize float32
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OnTapped func(*fyne.PointEvent)
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OnTappedSecondary func(*fyne.PointEvent)
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}
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func NewImagePlaceholder(centerIcon fyne.Resource, minSize float32) *ImagePlaceholder {
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i := &ImagePlaceholder{minSize: minSize}
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i.ExtendBaseWidget(i)
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i.iconImage = canvas.NewImageFromResource(centerIcon)
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i.iconImage.FillMode = canvas.ImageFillContain
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i.iconImage.SetMinSize(fyne.NewSize(minSize/4, minSize/4))
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i.imageDisp = NewTappableImage(i.onTapped)
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i.imageDisp.OnTappedSecondary = i.onTappedSecondary
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i.imageDisp.FillMode = canvas.ImageFillContain
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i.imageDisp.Hidden = true
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i.border = myTheme.NewThemedRectangle(theme.ColorNameBackground)
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i.border.BorderColorName = theme.ColorNameForeground
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i.border.BorderWidth = 3
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i.content = container.NewMax(
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i.border,
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container.NewCenter(i.iconImage),
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i.imageDisp,
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)
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return i
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}
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func (i *ImagePlaceholder) HaveImage() bool {
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return i.image != nil
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}
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func (i *ImagePlaceholder) SetImage(img image.Image, tappable bool) {
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i.image = img
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if img != nil {
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i.imageDisp.DisableTapping = !tappable
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i.imageDisp.Image.Image = img
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}
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i.Refresh()
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}
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func (i *ImagePlaceholder) Image() image.Image {
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return i.image
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}
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func (i *ImagePlaceholder) onTapped(e *fyne.PointEvent) {
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if i.OnTapped != nil {
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i.OnTapped(e)
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}
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}
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func (i *ImagePlaceholder) onTappedSecondary(e *fyne.PointEvent) {
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if i.OnTappedSecondary != nil {
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i.OnTappedSecondary(e)
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}
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}
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func (i *ImagePlaceholder) MinSize() fyne.Size {
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return fyne.NewSize(i.minSize, i.minSize)
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}
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func (i *ImagePlaceholder) Refresh() {
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i.border.Hidden = i.HaveImage()
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i.iconImage.Hidden = i.HaveImage()
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i.imageDisp.Hidden = !i.HaveImage()
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i.imageDisp.ScaleMode = i.ScaleMode
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i.iconImage.ScaleMode = i.ScaleMode
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i.BaseWidget.Refresh()
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}
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func (i *ImagePlaceholder) CreateRenderer() fyne.WidgetRenderer {
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return widget.NewSimpleRenderer(i.content)
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}
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