45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
package layouts
|
|
|
|
import (
|
|
"fyne.io/fyne/v2"
|
|
"fyne.io/fyne/v2/layout"
|
|
"fyne.io/fyne/v2/theme"
|
|
)
|
|
|
|
// Lays out up to 3 objects such that the middle object, Objects[1],
|
|
// is centered in the available space and takes up a fixed width.
|
|
// The left, and right (if non-nil), split the leftover space equally.
|
|
type LeftMiddleRightLayout struct {
|
|
middleWidth float32
|
|
hbox fyne.Layout
|
|
}
|
|
|
|
func NewLeftMiddleRightLayout(middleWidth float32) *LeftMiddleRightLayout {
|
|
return &LeftMiddleRightLayout{
|
|
middleWidth: middleWidth,
|
|
hbox: layout.NewHBoxLayout(),
|
|
}
|
|
}
|
|
|
|
func (b *LeftMiddleRightLayout) MinSize(objects []fyne.CanvasObject) fyne.Size {
|
|
hboxSize := b.hbox.MinSize(objects)
|
|
return fyne.Size{
|
|
Height: hboxSize.Height,
|
|
Width: hboxSize.Width + fyne.Max(0, b.middleWidth-objects[1].MinSize().Width),
|
|
}
|
|
}
|
|
|
|
func (b *LeftMiddleRightLayout) Layout(objects []fyne.CanvasObject, size fyne.Size) {
|
|
pad := theme.Padding()
|
|
midW := fyne.Max(b.middleWidth, objects[1].MinSize().Width)
|
|
lrW := (size.Width - midW - pad*4) / 2
|
|
objects[0].Resize(fyne.NewSize(lrW, size.Height))
|
|
objects[0].Move(fyne.NewPos(pad, 0))
|
|
objects[1].Resize(fyne.NewSize(midW, size.Height))
|
|
objects[1].Move(fyne.NewPos(lrW+pad*2, 0))
|
|
if objects[2] != nil {
|
|
objects[2].Resize(fyne.NewSize(lrW, size.Height))
|
|
objects[2].Move(fyne.NewPos(lrW+midW+pad*3, 0))
|
|
}
|
|
}
|