Remove the remaining use of hardcoded Entry widget in Form

validation.go

@@ -16,6 +16,11 @@ type ExpandedValidator interface {
 
 	// SetValidationError manually updates the validation status until the next input change.
 	SetValidationError(error)
+
+	// ShouldDisplayValidation tells a parent widget if the validatable widget wants to currently display
+	// the validation error. This can be used to avoid "nagging" the user about errors until it makes
+	// sense to show it. I.e. an empty widget.Entry that hasn't been interacted with does not show the error.
+	ShouldDisplayValidation() bool
 }
 
 // Validatable is an interface for specifying if a widget is validatable.

widget/entry_validation.go

@@ -63,6 +63,14 @@ func (e *Entry) SetValidationError(err error) {
 	}
 }
 
+// ShouldDisplayValidation returns true if the entry has not been interacted with
+// or is currently focused.
+//
+// Since: 2.5
+func (e *Entry) ShouldDisplayValidation() bool {
+	return !e.dirty || e.focused
+}
+
 var _ fyne.Widget = (*validationStatus)(nil)
 
 type validationStatus struct {

widget/form.go

@@ -296,10 +296,10 @@ func (f *Form) updateHelperText(item *FormItem) {
 	if item.helperOutput == nil {
 		return // testing probably, either way not rendered yet
 	}
-	showHintIfError := false
-	if e, ok := item.Widget.(*Entry); ok && (!e.dirty || e.focused) {
-		showHintIfError = true
-	}
+
+	ev, ok := item.Widget.(fyne.ExpandedValidator)
+	showHintIfError := ok && ev.ShouldDisplayValidation()
+
 	if item.validationError == nil || showHintIfError {
 		item.helperOutput.Text = item.HintText
 		item.helperOutput.Color = theme.PlaceHolderColor()