Go语言Fyne库中的widget.list按钮操作

huangapple
go评论115阅读模式
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

  1. package main
  3. import (
  4. 	"encoding/json"
  5. 	"fmt"
  6. 	"io/ioutil"
  8. 	"fyne.io/fyne/v2"
  9. 	"fyne.io/fyne/v2/app"
  10. 	"fyne.io/fyne/v2/container"
  11. 	"fyne.io/fyne/v2/theme"
  12. 	"fyne.io/fyne/v2/widget"
  13. )
  15. func main() {
  16. 	a := app.New()
  17. 	a.Settings().SetTheme(theme.DarkTheme())
  18. 	W := a.NewWindow("Application-OutSight")
  19. 	W.Resize(fyne.NewSize(640, 460))
  21. 	menuBar := []string{"Home", "App-Status", "Exit"}
  23. 	listView := widget.NewList(func() int {
  24. 		return len(menuBar)
  25. 	}, func() fyne.CanvasObject {
  26. 		return widget.NewLabel("template")
  27. 	}, func(id widget.ListItemID, o fyne.CanvasObject) {
  28. 		o.(*widget.Label).SetText(menuBar[id])
  29. 	})
  31. 	contenttext := widget.NewLabel("Welcome to this App")
  33. 	// 我想要的是这样的，但是不知道如何正确实现
  34. 	listView.OnSelected[0] = func(id widget.ListItemID) { //button 0
  35. 	}
  36. 	listView.OnSelected[1] = func(id widget.ListItemID) { //button 1
  37. 	}
  38. 	listView.OnSelected[2] = func(id widget.ListItemID) { //button 2
  39. 	}
  41. 	split := container.NewHSplit(
  42. 		listView,
  43. 		container.NewMax(contenttext),
  44. 	)
  45. 	split.Offset = 0.2
  46. 	W.SetContent(split)
  47. 	W.ShowAndRun()
  48. }

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

  2. package main
  4. import (
  5. 	"encoding/json"
  6. 	"fmt"
  7. 	"io/ioutil"
  9. 	"fyne.io/fyne/v2"
  10. 	"fyne.io/fyne/v2/app"
  11. 	"fyne.io/fyne/v2/container"
  12. 	"fyne.io/fyne/v2/theme"
  13. 	"fyne.io/fyne/v2/widget"
  16. func main() {
  19. 	a := app.New()
  20. 	a.Settings().SetTheme(theme.DarkTheme())
  21. 	W := a.NewWindow("Application-OutSight")
  22. 	W.Resize(fyne.NewSize(640, 460))
  24. 	menuBar := []strings{"Home","App-Status", "Exit"}
  25. 	
  26. 	listView := widget.NewList(func() int {
  27. 		return len(menuBar)
  28. 	}, func() fyne.CanvasObject {
  29. 		return widget.NewLabel("template")
  30. 	}, func(id widget.ListItemID, o fyne.CanvasObject) {
  31. 		o.(*widget.Label).SetText = (menuBar[id])
  33. 	})
  35. 	contenttext := widget.NewLabel("Welcome to this App")
  36. 	
  37. 	//what i want is this, but dont know how to get right
  38. 	listView.OnSelected[0] = func(id widget.ListItemID) { //button 0
  39. 			}
  40. 	listView.OnSelected[1] = func(id widget.ListItemID) { //button 1
  41. 			}
  42. 	listView.OnSelected[2] = func(id widget.ListItemID) { //buttton2
  43. 			}
  44. 			
  46. 	split := (container.NewHSplit(
  47. 		listView,
  48. 		container.NewMax(contenttext),
  49. 	))
  50. 	split.Offset = 0.2
  51. 	W.SetContent(split)
  52. 	W.ShowAndRun()
  54. }

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

  1. listView.OnSelected = func(id widget.ListItemID) {
  2.   switch id {
  3. 	case 0:
  4. 	  //在这里调用按钮/列表项0的函数
  5. 	case 1:
  6.       //在这里调用按钮/列表项1的函数
  7. 	case 2:
  8. 	  //在这里调用按钮/列表项2的函数
  9.     default:
  11.   }
  12. }
英文:

widget.List.OnSelected has argument widget.ListItemID which is an int.

You can use this id to called function for different items

  1. listView.OnSelected = func(id widget.ListItemID) {
  2.   switch id {
  3. 	case 0:
  4. 	  //call button/list-item 0 func here
  5. 	case 1:
  6.       //call button/list-item 1 func here
  7. 	case 2:
  8. 	  //call button/list-item 2 func here
  9.     default:
  11.   }
  12. }

huangapple
  • 本文由 发表于 2022年10月7日 18:49:08
  • 转载请务必保留本文链接：https://go.coder-hub.com/73986031.html
  • fyne
  • go
  • user-interface
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定