widget.NewSelect() Api enhancement request

[hq-zhonger]

Checklist

• I have searched the issue tracker for open issues that relate to the same feature, before opening a new one.
• This issue only relates to a single feature. I will open new issues for any other features.

Is your feature request related to a problem?

When selecting the right selection box, refresh the contents of the other selection box according to the contents of the selection box

Is it possible to construct a solution with the existing API?

No response

Describe the solution you'd like to see.

package main

import "fyne.io/fyne/v2/widget"

type App struct {
key *widget.Select
values *widget.Select
}

func (MyApp *App) ReturnKeyStringList() []string {
return []string{
"ThinkPHP",
"WordPress",
}
}

func (MyApp *App) ReturnThinkPHPStringList() []string {
return []string{
"ThinkPHP Sql",
"ThinkPHP Xss",
}
}

func (MyApp *App) ReturnWordPressStringList() []string {
return []string{
"WordPress Sql",
"WordPress Ssrf",
}
}

func main() {
var MyApp App

MyApp.key = widget.NewSelect(MyApp.ReturnKeyStringList(), func(s string) {
	switch s {
	case "ThinkPHP":
		MyApp.values.SetSelectStringList(MyApp.ReturnThinkPHPStringList())
		break
	case "WordPress":
		MyApp.values.SetSelectStringList(MyApp.ReturnWordPressStringList())
		break
	default:
		break
	}
})

MyApp.key.SetSelectedIndex(0)

MyApp.values = widget.NewSelect([]string{""}, func(s string) {

})

MyApp.values.SetSelectedIndex(0)

}

[Jacalz]

This shouldn’t require any API additions as far as I am aware. All you need to do is set the OnChanged method of one widget and make sure that it sets the contents of the other one. Just make sure that you don’t have an infinite loop of them updating each other.