Code:
/ 4.0 / 4.0 / 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. //---------------------------------------------------------------------------- // // 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
- CodeCastExpression.cs
- Funcletizer.cs
- SqlServices.cs
- EventEntry.cs
- ArraySubsetEnumerator.cs
- DbParameterHelper.cs
- FormViewRow.cs
- Matrix.cs
- TargetControlTypeCache.cs
- NewItemsContextMenuStrip.cs
- ConfigurationConverterBase.cs
- LocalizationComments.cs
- DataGridRowClipboardEventArgs.cs
- PrivateFontCollection.cs
- NoneExcludedImageIndexConverter.cs
- HitTestWithGeometryDrawingContextWalker.cs
- DataGridViewLinkCell.cs
- InstanceKeyView.cs
- LineServicesRun.cs
- _ProxyChain.cs
- CodeSubDirectory.cs
- FastEncoderWindow.cs
- OleDbPropertySetGuid.cs
- DescendantOverDescendantQuery.cs
- IndexOutOfRangeException.cs
- PrinterResolution.cs
- HttpResponseInternalWrapper.cs
- SurrogateDataContract.cs
- CultureInfoConverter.cs
- VerificationAttribute.cs
- SafeProcessHandle.cs
- DataRowCollection.cs
- WebPartManager.cs
- AlignmentYValidation.cs
- TreeView.cs
- InertiaRotationBehavior.cs
- Accessors.cs
- X509UI.cs
- ObjectStorage.cs
- RelatedCurrencyManager.cs
- EmbeddedObject.cs
- SubMenuStyleCollection.cs
- DataSourceHelper.cs
- UserControlParser.cs
- TextDecorations.cs
- ClientScriptManagerWrapper.cs
- SerialErrors.cs
- DictionaryEntry.cs
- Matrix3D.cs
- MultiPropertyDescriptorGridEntry.cs
- precedingsibling.cs
- xamlnodes.cs
- XmlAttributes.cs
- HttpCacheVary.cs
- SafeLibraryHandle.cs
- XmlQualifiedName.cs
- COM2FontConverter.cs
- ResourcePermissionBase.cs
- ProgressChangedEventArgs.cs
- GPRECT.cs
- PathSegmentCollection.cs
- SwitchElementsCollection.cs
- TypeInitializationException.cs
- FileStream.cs
- SequentialWorkflowHeaderFooter.cs
- ApplicationId.cs
- PageBreakRecord.cs
- ResourceReader.cs
- ScalarConstant.cs
- AddInIpcChannel.cs
- ChangePassword.cs
- StylusEventArgs.cs
- RuleSettings.cs
- SocketException.cs
- BooleanProjectedSlot.cs
- DataTemplateKey.cs
- OleDbReferenceCollection.cs
- ValidationSummary.cs
- KeyInfo.cs
- TransformedBitmap.cs
- SqlTopReducer.cs
- ProfileModule.cs
- XmlSchemaAttribute.cs
- CheckBoxBaseAdapter.cs
- CompositeScriptReference.cs
- AllMembershipCondition.cs
- StringUtil.cs
- SHA512.cs
- WebPartZoneBase.cs
- WebDescriptionAttribute.cs
- StateMachineDesignerPaint.cs
- SystemWebExtensionsSectionGroup.cs
- UserControlBuildProvider.cs
- FontCacheLogic.cs
- ConfigurationErrorsException.cs
- _ShellExpression.cs
- EntityContainerRelationshipSetEnd.cs
- Header.cs
- XmlNodeChangedEventArgs.cs
- XmlEncoding.cs