Fixed non-existant vehicle communicate, fixed clearButton, added stuff in order to display numerical keyboard on entering input

ztm_vehicles_app.go

@@ -3,12 +3,50 @@ package main
 import (
 	"fmt"
 
+	"strconv"
+
 	"fyne.io/fyne/v2/app"
 	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/widget"
 	"github.com/gocolly/colly/v2"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/driver/mobile"
 )
 
+type numericalEntry struct {
+	widget.Entry
+}
+
+func newNumericalEntry() *numericalEntry {
+	entry := &numericalEntry{}
+	entry.ExtendBaseWidget(entry)
+	return entry
+}
+
+func (e *numericalEntry) TypedRune(r rune) {
+	if (r >= '0' && r <= '9') || r == '.' || r == ',' {
+		e.Entry.TypedRune(r)
+	}
+}
+
+func (e *numericalEntry) 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 (e *numericalEntry) Keyboard() mobile.KeyboardType {
+	return mobile.NumberKeyboard
+}
+
 type vehicle struct {
 	producer                   string
 	model                      string
@@ -34,7 +72,7 @@ func getVehicleByNum(vehicleNum string) string {
 		vehicleURL = text
 	})
 	c2.Visit(searchURL)
-	if searchURL == "" {
+	if vehicleURL == "" {
 		return ""
 	} else {
 		var retrievedData [10]string
@@ -79,7 +117,7 @@ func main() {
 	w := a.NewWindow("Hello")
 
 	output := widget.NewLabel("")
-	entry := widget.NewEntry()
+	entry := newNumericalEntry()
 	form := &widget.Form{
 		Items: []*widget.FormItem{ // we can specify items in the constructor
 			{Text: "Podaj numer taborowy pojazdu:", Widget: entry}},
@@ -96,6 +134,8 @@ func main() {
 	clearButton := widget.NewButton("Wyczyść", func() {
 		entry.Text = ""
 		output.Text = ""
+		output.Refresh()
+		entry.Refresh()
 	})
 	w.SetContent(container.NewVBox(
 		form,