public void AddValidation(AutoFormsValidationAttribute validation, View control, string title)
{
if (string.IsNullOrWhiteSpace(title))
{
title = "Item";
}
//Debug.WriteLine($"AddValidation {validation.Type} for {title}");
var label = new Label
{
IsVisible = false,
IsEnabled = false,
TextColor = _clrValidationText,
Margin = new Thickness(3, 0, 0, 3)
};
switch (validation)
{
case AutoFormsMaxLengthAttribute max when validation.Type == AutoFormsValidationAttribute.ValidationType.MaxLength:
label.Text = $"\"{title}\" is over maximum length of {max.Length} ";
MonitorEntryControl(true, validation, control, label);
break;
case AutoFormsMinLengthAttribute min when validation.Type == AutoFormsValidationAttribute.ValidationType.MinLength:
label.Text = $"\"{title}\" must have at least {min.Length} characters";
MonitorEntryControl(true, validation, control, label);
break;
case AutoFormsValidationAttribute _ when validation.Type == AutoFormsValidationAttribute.ValidationType.Numeric:
label.Text = $"\"{title}\" can only contain numeric values";
MonitorEntryControl(true, validation, control, label);
break;
case AutoFormsValidationAttribute _ when validation.Type == AutoFormsValidationAttribute.ValidationType.Email:
label.Text = $"\"{title}\" must be a valid email address";
MonitorEntryControl(false, validation, control, label);
break;
case AutoFormsValidationAttribute _ when validation.Type == AutoFormsValidationAttribute.ValidationType.Required:
label.Text = $"\"{title}\" is required";
MonitorEntryControl(false, validation, control, label);
break;
default:
label = null;
break;
}
if (label == null)
{
return;
}
_stack.Children.Add(label);
_validations.Add(new Validation(validation, control, label));
}
public void AddValidation(AutoFormsValidationAttribute validation, View control, string title)
{
if (string.IsNullOrWhiteSpace(title))
{
title = "Item";
}
title = ControlBase.GetLocalizedString(title);
var label = new Label
{
IsVisible = false,
IsEnabled = false,
TextColor = _clrValidationText,
Margin = new Thickness(3, 0, 0, 3)
};
switch (validation)
{
case AutoFormsMaxLengthAttribute max when validation.Type == AutoFormsValidationAttribute.ValidationType.MaxLength:
label.Text = string.Format(ControlBase.GetLocalizedString(AutoFormsConstants.ValidationMaxLength), title, max.Length);
MonitorEntryControl(true, validation, control, label);
break;
case AutoFormsMinLengthAttribute min when validation.Type == AutoFormsValidationAttribute.ValidationType.MinLength:
label.Text = string.Format(ControlBase.GetLocalizedString(AutoFormsConstants.ValidationMinLength), title, min.Length);
break;
case AutoFormsValidationAttribute _ when validation.Type == AutoFormsValidationAttribute.ValidationType.Numeric:
label.Text = string.Format(ControlBase.GetLocalizedString(AutoFormsConstants.ValidationNumeric), title);
break;
case AutoFormsValidationAttribute _ when validation.Type == AutoFormsValidationAttribute.ValidationType.Email:
label.Text = string.Format(ControlBase.GetLocalizedString(AutoFormsConstants.ValidationEmail), title);
MonitorEntryControl(false, validation, control, label);
break;
case AutoFormsValidationAttribute _ when validation.Type == AutoFormsValidationAttribute.ValidationType.Required:
label.Text = string.Format(ControlBase.GetLocalizedString(AutoFormsConstants.ValidationRequired), title);
MonitorEntryControl(false, validation, control, label);
break;
default:
label = null;
break;
}
if (label == null)
{
return;
}
_stack.Children.Add(label);
_validations.Add(new Validation(validation, control, label));
}
public Validation(AutoFormsValidationAttribute validationAttribute, View control, Label label)
{
ValidationAttribute = validationAttribute;
Control = control;
Label = label;
}
private void MonitorEntryControl(bool activeMonitoring, AutoFormsValidationAttribute attribute, View control, Label label)
{
var c = control as Entry;
if (c != null)
{
if (activeMonitoring)
{
c.TextChanged += (object sender, TextChangedEventArgs e) =>
{
var invalid = !attribute.IsValid(e.NewTextValue);
if (label.IsEnabled != invalid)
{
ToggleValidation(label);
}
};
}
c.Unfocused += (object sender, FocusEventArgs e) =>
{
if (!e.IsFocused)
{
var invalid = !attribute.IsValid(c.Text);
if (label.IsEnabled != invalid)
{
ToggleValidation(label);
}
}
};
return;
}
var ed = control as Editor;
if (ed != null)
{
if (activeMonitoring)
{
ed.TextChanged += (object sender, TextChangedEventArgs e) =>
{
var invalid = !attribute.IsValid(e.NewTextValue);
if (label.IsEnabled != invalid)
{
ToggleValidation(label);
}
};
}
ed.Unfocused += (object sender, FocusEventArgs e) =>
{
if (!e.IsFocused)
{
var invalid = !attribute.IsValid(ed.Text);
if (label.IsEnabled != invalid)
{
ToggleValidation(label);
}
}
};
}
}
