fyne-widgets/pkg/layouts/floatingControlsLayout.go

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Go
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2021-12-11 13:54:32 +00:00
package layouts
import (
"fyne.io/fyne/v2"
)
type FloatingControlsLocationEnum uint32
const (
FloatingControlsTopLeft = iota
FloatingControlsTopRight
FloatingControlsBottomLeft
FloatingControlsBottomRight
FloatingControlsCenter
FloatingControlsTopMiddle
FloatingControlsRightMiddle
FloatingControlsBottomMiddle
FloatingControlsLeftMiddle
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)
type floatingControlsLayout struct {
FloatingControlsLocation FloatingControlsLocationEnum
}
// NewFloatingControlsLayout creates a new floatingControlsLayout instance
// This layout contains exactly TWO items, one background item (first) and one
// floating container that floats according to FloatingControlsLocation
func NewFloatingControlsLayout() floatingControlsLayout {
return floatingControlsLayout{FloatingControlsTopRight}
}
func (d *floatingControlsLayout) MinSize(objects []fyne.CanvasObject) fyne.Size {
if len(objects) > 1 {
return objects[0].MinSize()
}
return fyne.NewSize(0, 0)
}
func (d *floatingControlsLayout) Layout(objects []fyne.CanvasObject, containerSize fyne.Size) {
if len(objects) == 2 {
o := objects[0]
size := containerSize
o.Resize(size)
o.Move(fyne.NewPos(0, 0))
o = objects[1]
size = o.MinSize()
o.Resize(size)
switch d.FloatingControlsLocation {
case FloatingControlsTopLeft:
o.Move(fyne.NewPos(0, 0))
case FloatingControlsTopMiddle:
o.Move(fyne.NewPos((containerSize.Width/2)-(size.Width/2), 0))
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case FloatingControlsTopRight:
o.Move(fyne.NewPos(containerSize.Width-size.Width, 0))
case FloatingControlsBottomLeft:
o.Move(fyne.NewPos(0, containerSize.Height-size.Height))
case FloatingControlsBottomRight:
o.Move(fyne.NewPos(containerSize.Width-size.Width, containerSize.Height-size.Height))
case FloatingControlsBottomMiddle:
o.Move(fyne.NewPos((containerSize.Width/2)-(size.Width/2), containerSize.Height-size.Height))
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case FloatingControlsCenter:
o.Move(fyne.NewPos((containerSize.Width/2)-(size.Width/2), (containerSize.Height/2)-(size.Height/2)))
case FloatingControlsLeftMiddle:
o.Move(fyne.NewPos(0, (containerSize.Height/2)-(size.Height/2)))
case FloatingControlsRightMiddle:
o.Move(fyne.NewPos(containerSize.Width-size.Width, (containerSize.Height/2)-(size.Height/2)))
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}
}
}