Add GUI frontend

cmd/itgui/error.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"image/color"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/canvas"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/dialog"
+	"fyne.io/fyne/v2/widget"
+)
+
+func guiErr(err error, msg string, parent fyne.Window) {
+	msgLbl := widget.NewLabel(msg)
+	msgLbl.Wrapping = fyne.TextWrapWord
+	msgLbl.Alignment = fyne.TextAlignCenter
+	rect := canvas.NewRectangle(color.Transparent)
+	rect.SetMinSize(fyne.NewSize(350, 0))
+	content := container.NewVBox(
+		msgLbl,
+		rect,
+	)
+	if err != nil {
+		errLbl := widget.NewLabel(err.Error())
+		content.Add(widget.NewAccordion(
+			widget.NewAccordionItem("More Details", errLbl),
+		))
+	}
+	dialog.NewCustom("Error", "Ok", content, parent).Show()
+}