mirror of
https://github.com/ckaczor/ChrisKaczor.Wpf.Validation.git
synced 2026-01-13 17:22:33 -05:00
Handle tab controls when focusing on error
This commit is contained in:
@@ -1,25 +0,0 @@
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using System.Globalization;
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using System.Windows.Controls;
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namespace ChrisKaczor.Wpf.Validation
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{
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public class RequiredValidationRule : ValidationRule
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{
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public static string GetErrorMessage(object? fieldValue)
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{
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var errorMessage = string.Empty;
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if (fieldValue == null || string.IsNullOrWhiteSpace(fieldValue.ToString()))
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errorMessage = "Required";
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return errorMessage;
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}
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public override ValidationResult Validate(object value, CultureInfo cultureInfo)
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{
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var error = GetErrorMessage(value);
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return !string.IsNullOrEmpty(error) ? new ValidationResult(false, error) : ValidationResult.ValidResult;
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}
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}
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}
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@@ -1,126 +1,157 @@
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using System.Collections.Generic;
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using DebounceThrottle;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Linq;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Media;
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using System.Windows.Threading;
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namespace ChrisKaczor.Wpf.Validation
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namespace ChrisKaczor.Wpf.Validation;
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public class BindingExpressionInfo
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{
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public class BindingExpressionInfo
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{
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public FrameworkElement FrameworkElement { get; }
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public BindingExpression BindingExpression { get; }
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public FrameworkElement FrameworkElement { get; }
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public BindingExpression BindingExpression { get; }
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public BindingExpressionInfo(FrameworkElement frameworkElement, BindingExpression bindingExpression)
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public BindingExpressionInfo(FrameworkElement frameworkElement, BindingExpression bindingExpression)
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{
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FrameworkElement = frameworkElement;
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BindingExpression = bindingExpression;
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}
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}
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public static class WindowExtensions
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{
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public static List<BindingExpressionInfo> GetBindingExpressions(this DependencyObject parent)
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{
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return GetBindingExpressions(parent, null);
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}
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public static List<BindingExpressionInfo> GetBindingExpressions(this DependencyObject parent, UpdateSourceTrigger[]? triggers)
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{
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// Create a list of framework elements and binding expressions
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var bindingExpressions = new List<BindingExpressionInfo>();
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// Get all explicit bindings into the list
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GetBindingExpressions(parent, triggers, ref bindingExpressions);
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return bindingExpressions;
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}
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private static void GetBindingExpressions(DependencyObject parent, UpdateSourceTrigger[]? triggers, ref List<BindingExpressionInfo> bindingExpressions)
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{
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// Get the number of children
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var childCount = VisualTreeHelper.GetChildrenCount(parent);
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// Loop over each child
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for (var childIndex = 0; childIndex < childCount; childIndex++)
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{
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FrameworkElement = frameworkElement;
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BindingExpression = bindingExpression;
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// Get the child
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var dependencyObject = VisualTreeHelper.GetChild(parent, childIndex);
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// Check if the object is a tab control
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if (dependencyObject is TabControl tabControl)
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{
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// Loop over each tab
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foreach (TabItem tabItem in tabControl.Items)
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GetBindingExpressions((DependencyObject) tabItem.Content, triggers, ref bindingExpressions);
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}
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else
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{
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// Cast to framework element
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if (dependencyObject is FrameworkElement frameworkElement)
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{
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// Get the list of properties
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IEnumerable<DependencyProperty> dependencyProperties = TypeDescriptor.GetProperties(frameworkElement)
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.Cast<PropertyDescriptor>()
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.Select(DependencyPropertyDescriptor.FromProperty)
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.Where(dependencyPropertyDescriptor => dependencyPropertyDescriptor != null)
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.Select(dependencyPropertyDescriptor => dependencyPropertyDescriptor.DependencyProperty)
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.ToList();
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// Loop over each dependency property in the list
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foreach (var dependencyProperty in dependencyProperties)
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{
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// Try to get the binding expression for the property
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var bindingExpression = frameworkElement.GetBindingExpression(dependencyProperty);
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// If there is a binding expression and it is set to explicit then make it update the source
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if (bindingExpression != null && (triggers == null || triggers.Contains(bindingExpression.ParentBinding.UpdateSourceTrigger)))
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bindingExpressions.Add(new BindingExpressionInfo(frameworkElement, bindingExpression));
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}
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}
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// If the dependency object has any children then check them
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if (VisualTreeHelper.GetChildrenCount(dependencyObject) > 0)
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GetBindingExpressions(dependencyObject, triggers, ref bindingExpressions);
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}
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}
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}
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public static class WindowExtensions
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public static void UpdateAllSources(this DependencyObject _, IEnumerable<BindingExpressionInfo> bindingExpressions)
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{
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public static List<BindingExpressionInfo> GetBindingExpressions(this DependencyObject parent)
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foreach (var expression in bindingExpressions)
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expression.BindingExpression.UpdateSource();
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}
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public static void ClearAllValidationErrors(this DependencyObject _, IEnumerable<BindingExpressionInfo> bindingExpressions)
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{
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foreach (var expression in bindingExpressions)
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System.Windows.Controls.Validation.ClearInvalid(expression.BindingExpression);
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}
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public static bool IsValid(this DependencyObject window)
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{
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return IsValid(window, null);
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}
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private static readonly DebounceDispatcher FocusDispatcher = new(50);
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public static bool IsValid(this DependencyObject window, TabControl? tabControl)
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{
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// Get a list of all framework elements and binding expressions
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var bindingExpressions = window.GetBindingExpressions();
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// Loop over each binding expression and clear any existing error
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window.ClearAllValidationErrors(bindingExpressions);
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// Force all explicit bindings to update the source
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window.UpdateAllSources(bindingExpressions);
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// See if there are any errors
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if (!bindingExpressions.Any(b => b.BindingExpression.HasError))
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return true;
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// Get the first framework element with an error
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var firstErrorElement = bindingExpressions.First(b => b.BindingExpression.HasError).FrameworkElement;
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if (tabControl == null)
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{
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return GetBindingExpressions(parent, null);
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}
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public static List<BindingExpressionInfo> GetBindingExpressions(this DependencyObject parent, UpdateSourceTrigger[]? triggers)
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{
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// Create a list of framework elements and binding expressions
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var bindingExpressions = new List<BindingExpressionInfo>();
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// Get all explicit bindings into the list
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GetBindingExpressions(parent, triggers, ref bindingExpressions);
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return bindingExpressions;
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}
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private static void GetBindingExpressions(DependencyObject parent, UpdateSourceTrigger[]? triggers, ref List<BindingExpressionInfo> bindingExpressions)
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{
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// Get the number of children
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var childCount = VisualTreeHelper.GetChildrenCount(parent);
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// Loop over each child
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for (var childIndex = 0; childIndex < childCount; childIndex++)
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{
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// Get the child
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var dependencyObject = VisualTreeHelper.GetChild(parent, childIndex);
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// Check if the object is a tab control
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if (dependencyObject is TabControl tabControl)
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{
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// Loop over each tab
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foreach (TabItem tabItem in tabControl.Items)
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GetBindingExpressions((DependencyObject) tabItem.Content, triggers, ref bindingExpressions);
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}
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else
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{
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// Cast to framework element
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if (dependencyObject is FrameworkElement frameworkElement)
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{
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// Get the list of properties
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IEnumerable<DependencyProperty> dependencyProperties = (from PropertyDescriptor propertyDescriptor in TypeDescriptor.GetProperties(frameworkElement)
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select DependencyPropertyDescriptor.FromProperty(propertyDescriptor)
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into dependencyPropertyDescriptor
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where dependencyPropertyDescriptor != null
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select dependencyPropertyDescriptor.DependencyProperty).ToList();
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// Loop over each dependency property in the list
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foreach (var dependencyProperty in dependencyProperties)
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{
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// Try to get the binding expression for the property
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var bindingExpression = frameworkElement.GetBindingExpression(dependencyProperty);
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// If there is a binding expression and it is set to explicit then make it update the source
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if (bindingExpression != null && (triggers == null || triggers.Contains(bindingExpression.ParentBinding.UpdateSourceTrigger)))
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bindingExpressions.Add(new BindingExpressionInfo(frameworkElement, bindingExpression));
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}
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}
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// If the dependency object has any children then check them
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if (VisualTreeHelper.GetChildrenCount(dependencyObject) > 0)
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GetBindingExpressions(dependencyObject, triggers, ref bindingExpressions);
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}
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}
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}
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public static void UpdateAllSources(this DependencyObject window, IEnumerable<BindingExpressionInfo> bindingExpressions)
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{
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foreach (var expression in bindingExpressions)
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expression.BindingExpression.UpdateSource();
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}
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public static void ClearAllValidationErrors(this DependencyObject window, IEnumerable<BindingExpressionInfo> bindingExpressions)
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{
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foreach (var expression in bindingExpressions)
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System.Windows.Controls.Validation.ClearInvalid(expression.BindingExpression);
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}
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public static bool IsValid(this DependencyObject window)
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{
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// Get a list of all framework elements and binding expressions
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var bindingExpressions = window.GetBindingExpressions();
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// Loop over each binding expression and clear any existing error
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window.ClearAllValidationErrors(bindingExpressions);
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// Force all explicit bindings to update the source
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window.UpdateAllSources(bindingExpressions);
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// See if there are any errors
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if (!bindingExpressions.Any(b => b.BindingExpression.HasError))
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return true;
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// Get the first framework element with an error
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var firstErrorElement = bindingExpressions.First(b => b.BindingExpression.HasError).FrameworkElement;
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// Set focus
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firstErrorElement.Focus();
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return false;
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}
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// Loop over each tab item
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foreach (TabItem tabItem in tabControl.Items)
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{
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// Cast the content as visual
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var content = (Visual) tabItem.Content;
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// See if the control with the error is a descendant
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if (!firstErrorElement.IsDescendantOf(content))
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continue;
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// Select the tab
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tabItem.IsSelected = true;
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}
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var dispatcher = Dispatcher.CurrentDispatcher;
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FocusDispatcher.Debounce(() => dispatcher.Invoke(() => firstErrorElement.Focus()));
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return false;
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}
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}
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}
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@@ -14,6 +14,9 @@
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<PackageReadmeFile>README.md</PackageReadmeFile>
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<AssemblyName>ChrisKaczor.Wpf.Validation</AssemblyName>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="DebounceThrottle" Version="2.0.0" />
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</ItemGroup>
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<ItemGroup>
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<None Update="README.md">
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<Pack>True</Pack>
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