Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Controls / Primitives / DatePickerTextBox.cs / 1305600 / DatePickerTextBox.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System.Diagnostics; using System.Globalization; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Input; using System.Windows.Media; namespace System.Windows.Controls.Primitives { ////// DatePickerTextBox is a specialized form of TextBox which displays custom visuals when its contents are empty /// [TemplatePart(Name = DatePickerTextBox.ElementContentName, Type = typeof(ContentControl))] public sealed partial class DatePickerTextBox : TextBox { #region Constants private const string ElementContentName = "PART_Watermark"; #endregion #region Data private ContentControl elementContent; #endregion #region Constructor ////// Static constructor /// static DatePickerTextBox() { DefaultStyleKeyProperty.OverrideMetadata(typeof(DatePickerTextBox), new FrameworkPropertyMetadata(typeof(DatePickerTextBox))); TextProperty.OverrideMetadata(typeof(DatePickerTextBox), new FrameworkPropertyMetadata(OnVisualStatePropertyChanged)); } ////// Initializes a new instance of the public DatePickerTextBox() { this.SetCurrentValue(WatermarkProperty, SR.Get(SRID.DatePickerTextBox_DefaultWatermarkText)); this.Loaded += OnLoaded; this.IsEnabledChanged += new DependencyPropertyChangedEventHandler(OnDatePickerTextBoxIsEnabledChanged); } #endregion #region Public Properties #region Watermark ///class. /// /// Watermark dependency property /// internal static readonly DependencyProperty WatermarkProperty = DependencyProperty.Register( "Watermark", typeof(object), typeof(DatePickerTextBox), new PropertyMetadata(OnWatermarkPropertyChanged)); ////// Watermark content /// ///The watermark. internal object Watermark { get { return (object)GetValue(WatermarkProperty); } set { SetValue(WatermarkProperty, value); } } #endregion #endregion Public Properties #region Protected ////// Called when template is applied to the control. /// public override void OnApplyTemplate() { base.OnApplyTemplate(); elementContent = ExtractTemplatePart(ElementContentName); // We dont want to expose watermark property as public yet, because there // is a good chance in future that the implementation will change when // a WatermarkTextBox control gets implemented. This is mostly to // mimc SL. Hence setting the binding in code rather than in control template. if (elementContent != null) { Binding watermarkBinding = new Binding("Watermark"); watermarkBinding.Source = this; elementContent.SetBinding(ContentControl.ContentProperty, watermarkBinding); } OnWatermarkChanged(); } protected override void OnGotFocus(RoutedEventArgs e) { base.OnGotFocus(e); if (IsEnabled) { if (!string.IsNullOrEmpty(this.Text)) { Select(0, this.Text.Length); } } } #endregion Protected #region Private private void OnLoaded(object sender, RoutedEventArgs e) { ApplyTemplate(); } /// /// Change to the correct visual state for the textbox. /// /// /// true to use transitions when updating the visual state, false to /// snap directly to the new visual state. /// internal override void ChangeVisualState(bool useTransitions) { base.ChangeVisualState(useTransitions); // Update the WatermarkStates group if (this.Watermark != null && string.IsNullOrEmpty(this.Text)) { VisualStates.GoToState(this, useTransitions, VisualStates.StateWatermarked, VisualStates.StateUnwatermarked); } else { VisualStates.GoToState(this, useTransitions, VisualStates.StateUnwatermarked); } } private T ExtractTemplatePart(string partName) where T : DependencyObject { DependencyObject obj = GetTemplateChild(partName); return ExtractTemplatePart (partName, obj); } private static T ExtractTemplatePart (string partName, DependencyObject obj) where T : DependencyObject { Debug.Assert( obj == null || typeof(T).IsInstanceOfType(obj), string.Format(CultureInfo.InvariantCulture, SR.Get(SRID.DatePickerTextBox_TemplatePartIsOfIncorrectType), partName, typeof(T).Name)); return obj as T; } /// /// Called when the IsEnabled property changes. /// /// Sender object /// Property changed args private void OnDatePickerTextBoxIsEnabledChanged(object sender, DependencyPropertyChangedEventArgs e) { Debug.Assert(e.NewValue is bool); bool isEnabled = (bool)e.NewValue; SetCurrentValueInternal(IsReadOnlyProperty, MS.Internal.KnownBoxes.BooleanBoxes.Box(!isEnabled)); } private void OnWatermarkChanged() { if (elementContent != null) { Control watermarkControl = this.Watermark as Control; if (watermarkControl != null) { watermarkControl.IsTabStop = false; watermarkControl.IsHitTestVisible = false; } } } ////// Called when watermark property is changed. /// /// The sender. /// Theinstance containing the event data. private static void OnWatermarkPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args) { DatePickerTextBox datePickerTextBox = sender as DatePickerTextBox; Debug.Assert(datePickerTextBox != null, "The source is not an instance of a DatePickerTextBox!"); datePickerTextBox.OnWatermarkChanged(); datePickerTextBox.UpdateVisualState(); } #endregion Private } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- BooleanProjectedSlot.cs
- ExeContext.cs
- BitmapImage.cs
- HttpListenerResponse.cs
- RenderContext.cs
- DataBindingsDialog.cs
- FloatSumAggregationOperator.cs
- UserControl.cs
- DbParameterCollectionHelper.cs
- AssemblyBuilder.cs
- ExpiredSecurityTokenException.cs
- UserPreferenceChangingEventArgs.cs
- Rectangle.cs
- HwndProxyElementProvider.cs
- ParsedAttributeCollection.cs
- StrokeNodeEnumerator.cs
- AuthenticationSection.cs
- NullableConverter.cs
- TextTreeObjectNode.cs
- StateDesigner.CommentLayoutGlyph.cs
- CustomErrorCollection.cs
- EventManager.cs
- ResourceWriter.cs
- FrugalList.cs
- RootDesignerSerializerAttribute.cs
- BitmapEffectvisualstate.cs
- HtmlString.cs
- CapabilitiesAssignment.cs
- EncryptedXml.cs
- UserUseLicenseDictionaryLoader.cs
- SelectionChangedEventArgs.cs
- XmlNodeWriter.cs
- PeerNameResolver.cs
- DataGridrowEditEndingEventArgs.cs
- WebDescriptionAttribute.cs
- ProcessInputEventArgs.cs
- DataGridComboBoxColumn.cs
- SystemWebCachingSectionGroup.cs
- ValidationError.cs
- InfoCardCryptoHelper.cs
- VisualStyleTypesAndProperties.cs
- RegistrationServices.cs
- ApplicationCommands.cs
- ToolStripKeyboardHandlingService.cs
- SimpleHandlerBuildProvider.cs
- SoapHeaderException.cs
- Border.cs
- ComboBoxRenderer.cs
- BaseContextMenu.cs
- FloaterParaClient.cs
- RuleSetDialog.cs
- SizeChangedEventArgs.cs
- ViewSimplifier.cs
- GenericWebPart.cs
- WCFModelStrings.Designer.cs
- CodeTypeReferenceCollection.cs
- RtfToken.cs
- ImportedNamespaceContextItem.cs
- versioninfo.cs
- SupportsEventValidationAttribute.cs
- FontNamesConverter.cs
- BindingList.cs
- FixUpCollection.cs
- ListItemCollection.cs
- ManagementException.cs
- XmlILStorageConverter.cs
- ConnectionStringSettingsCollection.cs
- HttpCapabilitiesSectionHandler.cs
- CoTaskMemHandle.cs
- ComponentDispatcher.cs
- XdrBuilder.cs
- ProxyWebPart.cs
- File.cs
- ParsedAttributeCollection.cs
- CodeNamespace.cs
- Rule.cs
- DbProviderConfigurationHandler.cs
- TableRow.cs
- UmAlQuraCalendar.cs
- SqlWebEventProvider.cs
- CharAnimationBase.cs
- CanExecuteRoutedEventArgs.cs
- XPathException.cs
- ServiceDiscoveryElement.cs
- KeyTimeConverter.cs
- InteropEnvironment.cs
- Int64Storage.cs
- DesignTableCollection.cs
- FrameworkContentElementAutomationPeer.cs
- DBBindings.cs
- ZipIOLocalFileBlock.cs
- HtmlAnchor.cs
- FormsAuthenticationCredentials.cs
- MdImport.cs
- CultureInfoConverter.cs
- UnsafeNativeMethods.cs
- CLSCompliantAttribute.cs
- Base64Encoder.cs
- AuthenticationModuleElement.cs
- DependencyObjectProvider.cs