Fyne: Regarding the question of the form, hello dear fyne team, sorry I am here again, hope to help me this time

[cplasfwst]

Is your feature request related to a problem? Please describe:

Now I have a json data, for example:
{[one1 one2 one3} {two1 tow2 two3} {tree1 three2 three3} {four1 four2 four3}]}
myJson.Results[0].first : one1
myJson.Results[0].second : one2
myJson.Results[0].third : one3

I hope to have this display effect：

But I can only do this:

Below is my json file and code:
testJSON.zip

The above is the code file, in order to facilitate your reading, I also organized the following text code:
About main.go:
`package main

import (
"encoding/json"
"fmt"
"io/ioutil"
"os"

"fyne.io/fyne"
"fyne.io/fyne/app"
"fyne.io/fyne/widget"

)

type zhenshuju struct {
First string json:"first"
Second string json:"second"
Third string json:"third"
}

type jsonshuju struct {
Results []zhenshuju json:"results"
}

func main() {
myApp := app.New()
myWindow := myApp.NewWindow("test")
myWindow.Resize(fyne.NewSize(800, 600))

cut := jsonCut()

myTable := widget.NewTable(
    func() (int, int) { return 4, 4 },

    func() fyne.CanvasObject {
        return widget.NewLabel("Cell 000000, 000")
    },
    func(id widget.TableCellID, cell fyne.CanvasObject) {
        label := cell.(*widget.Label)
        label.SetText(cut.Results[id.Row].First)
    })

myWindow.SetContent(myTable)
myWindow.ShowAndRun()

}

func jsonCut() jsonshuju {
var data jsonshuju

resp, err := os.Open("./json.json")
if err != nil {
    fmt.Println(err)
}

bytes, err := ioutil.ReadAll(resp)
if err != nil {
    panic(err)
}

json.Unmarshal(bytes, &data)

return data

}
`

About json.json:
{ "status":0, "message":"ok", "results":[ { "first":"one1", "second":"one2", "third":"one3" }, { "first":"two1", "second":"two2", "third":"two3" }, { "first":"three1", "second":"three2", "third":"three3" }, { "first":"four1", "second":"four2", "third":"four3" } ] }

Hope to get your help!

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

Describe the solution you'd like to see:

[andydotxyz]

You have ignored id.Col when filling your results in the methiod:

func(id widget.TableCellID, cell fyne.CanvasObject) {
        label := cell.(*widget.Label)
        label.SetText(cut.Results[id.Row].First)
    }

[cplasfwst]

You have ignored id.Col when filling your results in the methiod:

func(id widget.TableCellID, cell fyne.CanvasObject) {
      label := cell.(*widget.Label)
      label.SetText(cut.Results[id.Row].First)
  }

Could you please show me how to watch it? I have already used id.Col

[stuartmscott]

You are indexing into cut.Results with id.Row, but they you are always accessing First. Why not make cut.Results[id.Row][id.Col]?

[cplasfwst]

cut.Results[id.Row][id.Col]

Yes, Boss, I also considered cut.Results[id.Row][id.Col] before, but I don’t know how to define No is cut.Results[id.Row].First in json, but cut. Results[id.Row][id.Col]
Can you help me answer how JSON defines the structure as cut.Results[][]
T.T

[stuartmscott]

Do you have control of the source of JSON? If so then instead of an array of maps:

{ "status":0, "message":"ok", "results":[ { "first":"one1", "second":"one2", "third":"one3" }, { "first":"two1", "second":"two2", "third":"two3" }, { "first":"three1", "second":"three2", "third":"three3" }, { "first":"four1", "second":"four2", "third":"four3" } ] }

Use an array of arrays:

{ "status":0, "message":"ok", "results":[ [ "one1", "one2", "one3" ], [ "two1", "two2", "two3" ], [ "three1", "three2", "three3" ], [ "four1", "four2", "four3" ] ] }

If you cannot change the JSON, then you need to map from int (id.Col) to string ("first", "second", "third", ...)

[cplasfwst]

id.Col

Very enthusiastic god, boss! Unfortunately, I don’t have control over JSON, how should I change the setting to id.Col

[stuartmscott]

There are probably several ways to do this, but maybe this will work;

func(id widget.TableCellID, cell fyne.CanvasObject) {
    label := cell.(*widget.Label)
    result := cut.Results[id.Row]
    var text string
    switch id.Col {
    case 0:
        text = result.First
    case 1:
        text = result.Second
    case 2:
        text = result.Third
    }
    label.SetText(text)
}

[cplasfwst]

There are probably several ways to do this, but maybe this will work;

func(id widget.TableCellID, cell fyne.CanvasObject) {
  label := cell.(*widget.Label)
  result := cut.Results[id.Row]
  var text string
  switch id.Col {
  case 0:
      text = result.First
  case 1:
      text = result.Second
  case 2:
      text = result.Third
  }
  label.SetText(text)
}

This is a good solution, thanks, I am using it now! !
I'm really sorry to interrupt your precious time! thank

When closing the question, I will ask you one last time. Because json data is returned through API, I am not sure about func() (int, int) {return ?,? }, the length of the table, do you know how to judge JSON data For example, how many rows does cut.Results have, because I can’t make it generate a fixed number of rows

[stuartmscott]

Assuming you will always have 3 columns;

func() (int, int) {
    return len(cut.Results), 3
}

[cplasfwst]

Assuming you will always have 3 columns;

func() (int, int) {
    return len(cut.Results), 3
}

Okay, perfect! Thanks for the extreme! I have learned a lot and I feel that interest is coming up!
Because I use GET to get the JSON API, I need to input it on GET, for example &page_num=0 or &page_num=1 or &page_num=2
Only 20 JSON pages can be retrieved each time
I don’t want to update the data that the table has acquired
How to add new row JSON into TABLE
I used Table.UpdateCell, it seems to delete the original data

[stuartmscott]

Assuming you don't want pagination in your UI then create a new slice var data []zhenshuju and update your callbacks to use it;

func() (int, int) {
    return len(data), 3
}
func(id widget.TableCellID, cell fyne.CanvasObject) {
    label := cell.(*widget.Label)
    result := data[id.Row]
    var text string
    switch id.Col {
    case 0:
        text = result.First
    case 1:
        text = result.Second
    case 2:
        text = result.Third
    }
    label.SetText(text)
}

Then whenever you do a GET, append the new results to data then call table.Refresh()

If you do want pagination then it is more complicated and I would suggest you hire @andydotxyz or myself to help you write the code.

[cplasfwst]

Assuming you don't want pagination in your UI then create a new slice var data []zhenshuju and update your callbacks to use it;

func() (int, int) {
    return len(data), 3
}
func(id widget.TableCellID, cell fyne.CanvasObject) {
  label := cell.(*widget.Label)
  result := data[id.Row]
  var text string
  switch id.Col {
  case 0:
      text = result.First
  case 1:
      text = result.Second
  case 2:
      text = result.Third
  }
  label.SetText(text)
}

Then whenever you do a GET, append the new results to data then call table.Refresh()

If you do want pagination then it is more complicated and I would suggest you hire @andydotxyz or myself to help you write the code.

I understand what you mean, I just thought of using a thing to store it! ! ! Great, if I encounter a problem, I will hire you to write a simple demo to help me learn. If the cost is not very high, haha no problem! ! ! I'm about to rest, it's morning on my side, I haven't slept yet, I'm a little tired! good night! I will close the topic, but this topic will not be deleted by the system, right? I will come back to watch and review

and goodnight!

[stuartmscott]

Sleep well!

[cplasfwst]

Sleep well!

good morning !!!
How should I set the width of each cell in TABLE, or a different width for each column? For example, three33333333333 is too long, it will extend the cell beyond

[stuartmscott]

The cell size is determined by the template object returned from CreateCell. @andydotxyz is working on the functionality for setting individual column width.

[andydotxyz]

Table.SetColumnWidth is now part of the release/v1.4.x branch ready for v1.4.1 release

[cplasfwst]

Table.SetColumnWidth is now part of the release/v1.4.x branch ready for v1.4.1 release

OK THANKS！！you