Using fyne widgets with OOP-style - go

Question

I want to combine some standard widget in one custom widget. I can do it if put all of widget fields into one container like so:
package main
import (
"fmt"
"fyne.io/fyne"
"fyne.io/fyne/app"
"fyne.io/fyne/layout"
"fyne.io/fyne/widget"
)
type MyWidget struct {
widget.BaseWidget
Cont *fyne.Container
text *widget.Label
statusBar *widget.Label
b1 *widget.Button
b2 *widget.Button
count uint
}
func (t *MyWidget) Init() {
t.b1 = widget.NewButton("1", func() {
t.text.SetText("1")
t.count++
t.statusBar.SetText(fmt.Sprint(t.count))
})
t.b2 = widget.NewButton("2", func() { t.text.SetText("2") })
t.statusBar = widget.NewLabel("status")
bottom := fyne.NewContainerWithLayout(layout.NewCenterLayout(), t.statusBar)
t.text = widget.NewLabelWithStyle("0", fyne.TextAlignTrailing, fyne.TextStyle{Bold: true})
t.Cont = fyne.NewContainerWithLayout(layout.NewBorderLayout(nil, bottom, nil, nil),
bottom, fyne.NewContainerWithLayout(
layout.NewGridLayoutWithRows(4),
fyne.NewContainerWithLayout(layout.NewCenterLayout(), t.text),
layout.NewSpacer(),
fyne.NewContainerWithLayout(layout.NewGridLayout(2), t.b1, t.b2),
layout.NewSpacer(),
))
}
func Load() *MyWidget {
obj := &MyWidget{BaseWidget: widget.BaseWidget{}}
obj.Init()
return obj
}
func main() {
f := app.New()
w := f.NewWindow("")
obj := Load()
w.SetContent(obj.Cont)
w.ShowAndRun()
}
I used to use GUI toolkits where top widget has opportunity to set container for holding child widgets. Is it possible get solution with Fyne without exported inner container?

Answer 1

I would recommend you look at using a container instead. (I.e. ‘fyne.NewContainerWithLayout(myLayout, widgets...)’.
Widgets and containers are distinct in Fyne. Widgets are an encapsulation for logic, with a renderer to display, Containers are used to group multiple widgets.
There are some widgets that bridge the gap, such as widget.Box and widget.Group, but they typically expose a container, or re-export the container methods.
Generally you don’t make a tree of widgets, but rather a container tree with widgets at the loop.