/// <summary>
/// Validates form inputs.
/// </summary>
/// <param name="focusedControl">currently focused form control</param>
/// <returns>true if the form is valid</returns>
bool ValidateForm(FormControl focusedControl = null)
{
var values = new Dictionary <string, string>();
var errors = new Dictionary <string, string>();
foreach (var control in formControls)
{
if (control.InputField != null)
{
values.Add(control.Name, control.InputField.text);
errors.Add(control.Name, null);
}
}
foreach (var globalValidator in globalValidators)
{
globalValidator(values, errors);
}
foreach (var control in formControls)
{
if (control.InputField == null)
{
continue;
}
foreach (var validator in control.Validators)
{
string errorMessage = validator(values[control.Name]);
if (errorMessage != null)
{
if (focusedControl == control ||
(focusedControl == null && errors[control.Name] == null))
{
errors[control.Name] = errorMessage;
}
else if (focusedControl != null)
{
errors[control.Name] = "";
}
break;
}
}
}
UpdateErrorPanel(errors, focusedControl);
foreach (var rec in errors)
{
if (rec.Value != null)
{
return(false);
}
}
return(true);
}
/// <summary>
/// Shows errors in form.
/// </summary>
/// <param name="errors">mapping of control names to errors</param>
/// <param name="focusedControl">currently focused form control</param>
private void UpdateErrorPanel(Dictionary <string, string> errors, FormControl focusedControl = null)
{
if (errorPanel == null)
{
errorPanel = (GameObject)GameObject.Instantiate(Resources.Load("Prefabs/FormErrorPanel"));
errorTextComponent = errorPanel.GetComponentInChildren <Text>(true);
errorPanel.SetActive(false);
}
// hide error panel at the start, show only when error is found
errorPanel.SetActive(false);
foreach (var control in formControls)
{
if (control.InputField == null)
{
continue;
}
string error = errors[control.Name];
var inputField = control.InputField;
if (error == null || !control.Touched)
{
inputField.image.color = Color.white;
}
// do not show errors on controls that haven't been touched yet
else if (control.Touched)
{
inputField.image.color = Color.red;
// show error panel if there's an error with text
// error panel is shown only only for one error - error from currently focused control
// takes priority, if there's no such error we show panel for first error with text
if (error != "" &&
(!errorPanel.activeInHierarchy ||
control == focusedControl)
)
{
errorPanel.SetActive(true);
errorTextComponent.text = error;
errorTextComponent.fontSize = errorFontSize > 0
? errorFontSize
: inputField.GetComponentInChildren <Text>().fontSize;
var errorRt = errorPanel.GetComponent <RectTransform>();
var fieldRt = inputField.GetComponent <RectTransform>();
// copy rect transform
errorRt.SetParent(fieldRt.parent);
errorRt.anchorMin = fieldRt.anchorMin;
errorRt.anchorMax = fieldRt.anchorMax;
errorRt.pivot = fieldRt.pivot;
errorRt.localScale = fieldRt.localScale;
if (fieldRt.localPosition.x < 100)
{
errorRt.anchoredPosition = fieldRt.anchoredPosition + new Vector2(5 + fieldRt.rect.width, 0);
}
else
{
errorRt.anchoredPosition = fieldRt.anchoredPosition + new Vector2(-5 - fieldRt.rect.width, 0);
}
var newLines = error.Count(c => c == '\n');
errorRt.sizeDelta = new Vector2(fieldRt.sizeDelta.x, fieldRt.sizeDelta.y * (newLines + 1));
}
}
}
}