Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / ControlTemplate.cs / 1305600 / ControlTemplate.cs
//------------------------------------------------------------------------------------ // // File: ControlTemplate.cs // // Description: // A generic class that allow instantiation of a tree of Framework[Content]Elements. // This is used to specify an overall master template for a Control. The control // author defines the default ControlTemplate and the app author can override this. // // Copyright (C) 2004 by Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------------- using System.Diagnostics; // Debug using System.Windows.Controls; // Control using System.Windows.Media.Animation; // Timeline using System.Windows.Navigation; // PageFunctionBase using System.ComponentModel; // DesignerSerializationVisibilityAttribute & DefaultValue using System.Windows.Markup; // DependsOnAttribute namespace System.Windows.Controls { ////// A generic class that allow instantiation of a tree of /// Framework[Content]Elements. This is used to specify an /// overall master template for a Control. The control author /// defines the default ControlTemplate and the app author /// can override this. /// [Localizability(LocalizationCategory.None, Readability=Readability.Unreadable)] [DictionaryKeyProperty("TargetType")] public class ControlTemplate : FrameworkTemplate { #region Construction ////// ControlTemplate Constructor /// public ControlTemplate() { } ////// ControlTemplate Constructor /// public ControlTemplate(Type targetType) { ValidateTargetType(targetType, "targetType"); _targetType = targetType; } #endregion Construction #region PublicMethods ////// Validate against the following rules /// 1. One cannot use a ControlTemplate to template a FrameworkContentElement /// 2. One cannot use a ControlTemplate to template a FrameworkElement other than a Control /// 3. One cannot use a ControlTemplate to template a Control that isn't associated with it /// protected override void ValidateTemplatedParent(FrameworkElement templatedParent) { // Must have a non-null feTemplatedParent if (templatedParent == null) { throw new ArgumentNullException("templatedParent"); } // The target type of a ControlTemplate must match the // type of the Control that it is being applied to if (_targetType != null && !_targetType.IsInstanceOfType(templatedParent)) { throw new ArgumentException(SR.Get(SRID.TemplateTargetTypeMismatch, _targetType.Name, templatedParent.GetType().Name)); } // One cannot use a ControlTemplate to template a Control that isn't associated with it if (templatedParent.TemplateInternal != this) { throw new ArgumentException(SR.Get(SRID.MustNotTemplateUnassociatedControl)); } } #endregion PublicMethods #region PublicProperties ////// TargetType for this ControlTemplate /// [Ambient] [DefaultValue(null)] public Type TargetType { get { return _targetType; } set { ValidateTargetType(value, "value"); CheckSealed(); _targetType = value; } } ////// Collection of Triggers /// [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] [DependsOn("VisualTree")] [DependsOn("Template")] public TriggerCollection Triggers { get { if (_triggers == null) { _triggers = new TriggerCollection(); // If the template has been sealed prior to this the newly // created TriggerCollection also needs to be sealed if (IsSealed) { _triggers.Seal(); } } return _triggers; } } #endregion PublicProperties #region NonPublicMethods // Validate against two rules // 1. targetType must not null // 2. targetType must be a Control or a subclass of it private void ValidateTargetType(Type targetType, string argName) { if (targetType == null) { throw new ArgumentNullException(argName); } if (!typeof(Control).IsAssignableFrom(targetType) && !typeof(Page).IsAssignableFrom(targetType) && !typeof(PageFunctionBase).IsAssignableFrom(targetType)) { throw new ArgumentException(SR.Get(SRID.InvalidControlTemplateTargetType, targetType.Name)); } } #endregion NonPublicMethods #region NonPublicProperties // // TargetType for ControlTemplate. This is override is // so FrameworkTemplate can see this property. // internal override Type TargetTypeInternal { get { if (TargetType != null) { return TargetType; } return DefaultTargetType; } } // Subclasses must provide a way for the parser to directly set the // target type. internal override void SetTargetTypeInternal(Type targetType) { TargetType = targetType; } // // Collection of Triggers for a ControlTemplate. This is // override is so FrameworkTemplate can see this property. // internal override TriggerCollection TriggersInternal { get { return Triggers; } } #endregion NonPublicProperties #region Data private Type _targetType; private TriggerCollection _triggers; // Target type is FrameworkElement by default internal static readonly Type DefaultTargetType = typeof(Control); #endregion Data } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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