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Open Text Files – Fyne GUI Golang tutorial 45
Open Text Files – Fyne GUI Golang tutorial 45
Want to read and write files in Fyne? Fortunately it is very easy.
This tutorial is about how to read a text file from your harddrive.
Open Text Files – Fyne GUI Golang tutorial 45
Source Code
package main
// import fyne
import (
"io/ioutil"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/app"
"fyne.io/fyne/v2/container"
"fyne.io/fyne/v2/dialog"
"fyne.io/fyne/v2/storage"
"fyne.io/fyne/v2/widget"
)
func main() {
// New app
a := app.New()
//New title and window
w := a.NewWindow("Open file in FYNE")
// resize window
w.Resize(fyne.NewSize(400, 400))
// New Buttton
btn := widget.NewButton("Open .txt files", func() {
// Using dialogs to open files
// first argument func(fyne.URIReadCloser, error)
// 2nd is parent window in our case "w"
// r for reader
// _ is ignore error
file_Dialog := dialog.NewFileOpen(
func(r fyne.URIReadCloser, _ error) {
// read files
data, _ := ioutil.ReadAll(r)
// reader will read file and store data
// now result
result := fyne.NewStaticResource("name", data)
// lets display our data in label or entry
entry := widget.NewMultiLineEntry()
// string() function convert byte to string
entry.SetText(string(result.StaticContent))
// Lets show and setup content
// tile of our new window
w := fyne.CurrentApp().NewWindow(
string(result.StaticName)) // title/name
w.SetContent(container.NewScroll(entry))
w.Resize(fyne.NewSize(400, 400))
// show/display content
w.Show()
// we are almost done
}, w)
// fiter to open .txt files only
// array/slice of strings/extensions
file_Dialog.SetFilter(
storage.NewExtensionFileFilter([]string{".txt"}))
file_Dialog.Show()
// Show file selection dialog.
})
// lets show button in parent window
w.SetContent(container.NewVBox(
btn,
))
w.ShowAndRun()
}
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