numEntry.go

package main

import (
	"strconv"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/data/validation"
	"fyne.io/fyne/v2/driver/mobile"
	"fyne.io/fyne/v2/widget"
)

type NumEntry struct {
	widget.Entry
}

func NewNumEntry() *NumEntry {
	e := &NumEntry{}
	e.ExtendBaseWidget(e)
	e.Validator = validation.NewRegexp(`\d`, "Must contain a number")
	return e
}

func (e *NumEntry) TypedRune(r rune) {
	if (r >= '0' && r <= '9') || r == '.' || r == ',' {
		e.Entry.TypedRune(r)
	}
}

func (e *NumEntry) TypedShortcut(shortcut fyne.Shortcut) {
	paste, ok := shortcut.(*fyne.ShortcutPaste)
	if !ok {
		e.Entry.TypedShortcut(shortcut)
		return
	}

	content := paste.Clipboard.Content()
	if _, err := strconv.ParseFloat(content, 64); err == nil {
		e.Entry.TypedShortcut(shortcut)
	}
}

func (n *NumEntry) Keyboard() mobile.KeyboardType {
	return mobile.NumberKeyboard
}