ListView – Fyne Golang GUI Tutorial 55

ListView – Fyne Golang GUI Tutorial 55

We are using listView everywhere.

contact list, file list, website list etc

Fyne ListView tutorial is here for you.

Component of fyne listview

There are 3 main component of fyne listview.

1.Item count

Let suppose my list consist of 30 contacts number. I want to display their name and phone number in my listview.

2.items/ widget 

Now I have to decide my widget. How I want to display my data to user. In a label  or card ?

3.update data in widgets

I will setup listview to get the data and update data from the source.

OnSelected function in fyne listview

What function I want to perform, when the listview item is clicked/selected

OnUnselected function in fyne listview

And onUnselected is the opposite of onSelected. It will execute the function when a user unselect an item.

 

 

package main
// import fyne
import (
    "fyne.io/fyne/v2"
    "fyne.io/fyne/v2/app"
    "fyne.io/fyne/v2/widget"
)
func main() {
    a := app.New()
    // window and title
    w := a.NewWindow("List View")
    // resize
    w.Resize(fyne.NewSize(400, 400))
    // list View
    // 3 arguments
    // item count, 3 itmes in list
    // widget, I want to use label widget
    // update data of widget
    list := widget.NewList(
        // lets change item count from 3 to 30
        func() int { return 30 }, // my list contain 3 items
        func() fyne.CanvasObject { return widget.NewLabel("I want to use label") },
        // last one
        func(lii widget.ListItemID, co fyne.CanvasObject) {
            // update data of widget
            co.(*widget.Label).SetText("Here is my text")
        },
    )
    // setup data on screen
    w.SetContent(list)
    w.ShowAndRun()
}

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Fyne Golang GUI Course

Tony BB
 

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