英文:
Go lang fyne widget.list button action
问题
嗨，我正在尝试解决这个谜题，我该如何为每个单独的按钮设置函数？这样它们就不会对我拥有的所有3个按钮执行相同的操作。
通过使用onSelected应该是可能的，我只是不知道如何正确实现。是的，我确实阅读了Fyne的文档；=）
我知道这些实际上不是按钮，但是它们应该具有与按钮相同的选项，只需使用onSelected。
关于widget.list的Fyne文档：
https://developer.fyne.io/api/v2.0/widget/list.html
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/app"
"fyne.io/fyne/v2/container"
"fyne.io/fyne/v2/theme"
"fyne.io/fyne/v2/widget"
)
func main() {
a := app.New()
a.Settings().SetTheme(theme.DarkTheme())
W := a.NewWindow("Application-OutSight")
W.Resize(fyne.NewSize(640, 460))
menuBar := []string{"Home", "App-Status", "Exit"}
listView := widget.NewList(func() int {
return len(menuBar)
}, func() fyne.CanvasObject {
return widget.NewLabel("template")
}, func(id widget.ListItemID, o fyne.CanvasObject) {
o.(*widget.Label).SetText(menuBar[id])
})
contenttext := widget.NewLabel("Welcome to this App")
// 我想要的是这样的，但是不知道如何正确实现
listView.OnSelected[0] = func(id widget.ListItemID) { //button 0
}
listView.OnSelected[1] = func(id widget.ListItemID) { //button 1
}
listView.OnSelected[2] = func(id widget.ListItemID) { //button 2
}
split := container.NewHSplit(
listView,
container.NewMax(contenttext),
)
split.Offset = 0.2
W.SetContent(split)
W.ShowAndRun()
}
希望这可以帮助到你！
英文:
Hey im trying to solve this puzzle how do i set func for every seperate button i have ? so it dosent do the same for alle 3 buttons i have
it should be possibe by using onselected i just cant figure how to get it right. and yes i did read the docs from Fyne ;=)
i know its not actual buttons, but they should have the same options as a button just by using the onselected
fyne doc regarding widget.list
https://developer.fyne.io/api/v2.0/widget/list.html
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/app"
"fyne.io/fyne/v2/container"
"fyne.io/fyne/v2/theme"
"fyne.io/fyne/v2/widget"
func main() {
a := app.New()
a.Settings().SetTheme(theme.DarkTheme())
W := a.NewWindow("Application-OutSight")
W.Resize(fyne.NewSize(640, 460))
menuBar := []strings{"Home","App-Status", "Exit"}
listView := widget.NewList(func() int {
return len(menuBar)
}, func() fyne.CanvasObject {
return widget.NewLabel("template")
}, func(id widget.ListItemID, o fyne.CanvasObject) {
o.(*widget.Label).SetText = (menuBar[id])
})
contenttext := widget.NewLabel("Welcome to this App")
//what i want is this, but dont know how to get right
listView.OnSelected[0] = func(id widget.ListItemID) { //button 0
}
listView.OnSelected[1] = func(id widget.ListItemID) { //button 1
}
listView.OnSelected[2] = func(id widget.ListItemID) { //buttton2
}
split := (container.NewHSplit(
listView,
container.NewMax(contenttext),
))
split.Offset = 0.2
W.SetContent(split)
W.ShowAndRun()
}
答案1
得分: 1
widget.List.OnSelected有一个参数widget.ListItemID，它是一个整数。
你可以使用这个id来调用不同项目的函数
listView.OnSelected = func(id widget.ListItemID) {
switch id {
case 0:
//在这里调用按钮/列表项0的函数
case 1:
//在这里调用按钮/列表项1的函数
case 2:
//在这里调用按钮/列表项2的函数
default:
}
}
英文:
widget.List.OnSelected has argument widget.ListItemID which is an int.
You can use this id to called function for different items
listView.OnSelected = func(id widget.ListItemID) {
switch id {
case 0:
//call button/list-item 0 func here
case 1:
//call button/list-item 1 func here
case 2:
//call button/list-item 2 func here
default:
}
}
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