Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Controls / Primitives / RangeBase.cs / 1 / RangeBase.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections; using System.ComponentModel; using System.Globalization; using System.Windows.Threading; using System.Windows.Automation.Peers; using System.Windows.Automation.Provider; using System.Windows.Controls; using System.Windows.Controls.Primitives; using System.Windows; using System.Windows.Input; using System.Windows.Media; using MS.Internal; using MS.Utility; namespace System.Windows.Controls.Primitives { ////// The RangeBase class is the base class from which all "range-like" /// controls derive. It defines the relevant events and properties, as /// well as providing handlers for the relevant input events. /// ///[DefaultEvent("ValueChanged"), DefaultProperty("Value")] public abstract class RangeBase : Control { #region Constructors /// /// Default RangeBase constructor /// ////// Automatic determination of current Dispatcher. Use alternative constructor /// that accepts a Dispatcher for best performance. /// protected RangeBase() { } #endregion Constructors #region Events ////// Event correspond to Value changed event /// public static readonly RoutedEvent ValueChangedEvent = EventManager.RegisterRoutedEvent("ValueChanged", RoutingStrategy.Bubble, typeof(RoutedPropertyChangedEventHandler), typeof(RangeBase)); /// /// Add / Remove ValueChangedEvent handler /// [Category("Behavior")] public event RoutedPropertyChangedEventHandlerValueChanged { add { AddHandler(ValueChangedEvent, value); } remove { RemoveHandler(ValueChangedEvent, value); } } #endregion Events #region Properties /// /// The DependencyProperty for the Minimum property. /// Flags: none /// Default Value: 0 /// public static readonly DependencyProperty MinimumProperty = DependencyProperty.Register( "Minimum", typeof(double), typeof(RangeBase), new FrameworkPropertyMetadata( 0.0d, new PropertyChangedCallback(OnMinimumChanged)), new ValidateValueCallback(IsValidDoubleValue)); ////// Minimum restricts the minimum value of the Value property /// [Bindable(true), Category("Behavior")] public double Minimum { get { return (double) GetValue(MinimumProperty); } set { SetValue(MinimumProperty, value); } } ////// Called when MinimumProperty is changed on "d." /// private static void OnMinimumChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { RangeBase ctrl = (RangeBase) d; RangeBaseAutomationPeer peer = UIElementAutomationPeer.FromElement(ctrl) as RangeBaseAutomationPeer; if (peer != null) { peer.RaiseMinimumPropertyChangedEvent((double)e.OldValue, (double)e.NewValue); } ctrl.CoerceValue(MaximumProperty); ctrl.CoerceValue(ValueProperty); ctrl.OnMinimumChanged((double)e.OldValue, (double)e.NewValue); } ////// This method is invoked when the Minimum property changes. /// /// The old value of the Minimum property. /// The new value of the Minimum property. protected virtual void OnMinimumChanged(double oldMinimum, double newMinimum) { } ////// The DependencyProperty for the Maximum property. /// Flags: none /// Default Value: 1 /// public static readonly DependencyProperty MaximumProperty = DependencyProperty.Register( "Maximum", typeof(double), typeof(RangeBase), new FrameworkPropertyMetadata( 1.0d, new PropertyChangedCallback(OnMaximumChanged), new CoerceValueCallback(CoerceMaximum)), new ValidateValueCallback(IsValidDoubleValue)); private static object CoerceMaximum(DependencyObject d, object value) { RangeBase ctrl = (RangeBase) d; double min = ctrl.Minimum; if ((double) value < min) { return min; } return value; } ////// Maximum restricts the maximum value of the Value property /// [Bindable(true), Category("Behavior")] public double Maximum { get { return (double) GetValue(MaximumProperty); } set { SetValue(MaximumProperty, value); } } ////// Called when MaximumProperty is changed on "d." /// private static void OnMaximumChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { RangeBase ctrl = (RangeBase) d; RangeBaseAutomationPeer peer = UIElementAutomationPeer.FromElement(ctrl) as RangeBaseAutomationPeer; if (peer != null) { peer.RaiseMaximumPropertyChangedEvent((double)e.OldValue, (double)e.NewValue); } ctrl.CoerceValue(ValueProperty); ctrl.OnMaximumChanged((double) e.OldValue, (double) e.NewValue); } ////// This method is invoked when the Maximum property changes. /// /// The old value of the Maximum property. /// The new value of the Maximum property. protected virtual void OnMaximumChanged(double oldMaximum, double newMaximum) { } ////// The DependencyProperty for the Value property. /// Flags: None /// Default Value: 0 /// public static readonly DependencyProperty ValueProperty = DependencyProperty.Register( "Value", typeof(double), typeof(RangeBase), new FrameworkPropertyMetadata( 0.0d, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault | FrameworkPropertyMetadataOptions.Journal, new PropertyChangedCallback(OnValueChanged), new CoerceValueCallback(ConstrainToRange)), new ValidateValueCallback(IsValidDoubleValue)); // made this internal because Slider wants to leverage it internal static object ConstrainToRange(DependencyObject d, object value) { RangeBase ctrl = (RangeBase) d; double min = ctrl.Minimum; double v = (double) value; if (v < min) { return min; } double max = ctrl.Maximum; if (v > max) { return max; } return value; } ////// Value property /// [Bindable(true), Category("Behavior")] public double Value { get { return (double) GetValue(ValueProperty); } set { SetValue(ValueProperty, value); } } ////// Called when ValueID is changed on "d." /// private static void OnValueChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { RangeBase ctrl = (RangeBase)d; RangeBaseAutomationPeer peer = UIElementAutomationPeer.FromElement(ctrl) as RangeBaseAutomationPeer; if (peer != null) { peer.RaiseValuePropertyChangedEvent((double)e.OldValue, (double)e.NewValue); } ctrl.OnValueChanged((double) e.OldValue, (double) e.NewValue); } ////// This method is invoked when the Value property changes. /// /// The old value of the Value property. /// The new value of the Value property. protected virtual void OnValueChanged(double oldValue, double newValue) { RoutedPropertyChangedEventArgsargs = new RoutedPropertyChangedEventArgs (oldValue, newValue); args.RoutedEvent=RangeBase.ValueChangedEvent; RaiseEvent(args); } /// /// Validate input value in RangeBase (Minimum, Maximum, and Value). /// /// ///Returns False if value is NaN or NegativeInfinity or PositiveInfinity. Otherwise, returns True. private static bool IsValidDoubleValue(object value) { double d = (double)value; return !(DoubleUtil.IsNaN(d) || double.IsInfinity(d)); } ////// Validate input value in RangeBase (SmallChange and LargeChange). /// /// ///Returns False if value is NaN or NegativeInfinity or PositiveInfinity or negative. Otherwise, returns True. private static bool IsValidChange(object value) { double d = (double)value; return IsValidDoubleValue(value) && d >= 0.0; } #region LargeChange Property ////// The DependencyProperty for the LargeChange property. /// public static readonly DependencyProperty LargeChangeProperty = DependencyProperty.Register("LargeChange", typeof(double), typeof(RangeBase), new FrameworkPropertyMetadata(1.0), new ValidateValueCallback(IsValidChange)); ////// LargeChange property /// [Bindable(true), Category("Behavior")] public double LargeChange { get { return (double)GetValue(LargeChangeProperty); } set { SetValue(LargeChangeProperty, value); } } #endregion #region SmallChange Property ////// The DependencyProperty for the SmallChange property. /// public static readonly DependencyProperty SmallChangeProperty = DependencyProperty.Register("SmallChange", typeof(double), typeof(RangeBase), new FrameworkPropertyMetadata(0.1), new ValidateValueCallback(IsValidChange)); ////// SmallChange property /// [Bindable(true), Category("Behavior")] public double SmallChange { get { return (double)GetValue(SmallChangeProperty); } set { SetValue(SmallChangeProperty, value); } } #endregion #endregion #region Method Overrides ////// Gives a string representation of this object. /// public override string ToString() { string typeText = this.GetType().ToString(); double min = double.NaN; double max = double.NaN; double val = double.NaN; bool valuesDefined = false; // Accessing RangeBase properties may be thread sensitive if (CheckAccess()) { min = Minimum; max = Maximum; val = Value; valuesDefined = true; } else { //Not on dispatcher, try posting to the dispatcher with 20ms timeout Dispatcher.Invoke(DispatcherPriority.Send, new TimeSpan(0, 0, 0, 0, 20), new DispatcherOperationCallback(delegate(object o) { min = Minimum; max = Maximum; val = Value; valuesDefined = true; return null; }), null); } // If min, max, value are defined if (valuesDefined) { return SR.Get(SRID.ToStringFormatString_RangeBase, typeText, min, max, val); } // Not able to access the dispatcher return typeText; } #endregion } } // 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
- SqlError.cs
- HtmlFormParameterReader.cs
- PluralizationServiceUtil.cs
- ButtonStandardAdapter.cs
- _ChunkParse.cs
- ObjectAnimationUsingKeyFrames.cs
- JoinElimination.cs
- Bookmark.cs
- ObjectDisposedException.cs
- ControlParameter.cs
- thaishape.cs
- Int16Converter.cs
- NTAccount.cs
- NetSectionGroup.cs
- GradientStop.cs
- DecoderNLS.cs
- CommandID.cs
- CodeGen.cs
- ObjectListSelectEventArgs.cs
- DeviceContext2.cs
- XmlSerializerOperationBehavior.cs
- Parser.cs
- Tracking.cs
- PasswordPropertyTextAttribute.cs
- CheckBoxList.cs
- ButtonBaseAdapter.cs
- Calendar.cs
- EventSetterHandlerConverter.cs
- CodeTryCatchFinallyStatement.cs
- ProcessHost.cs
- Int64KeyFrameCollection.cs
- SymbolEqualComparer.cs
- XsltException.cs
- DataGridItemEventArgs.cs
- FrameworkPropertyMetadata.cs
- DPCustomTypeDescriptor.cs
- Token.cs
- FontWeight.cs
- Canvas.cs
- Point.cs
- DispatcherFrame.cs
- CodePageUtils.cs
- DecimalFormatter.cs
- ReverseQueryOperator.cs
- RTLAwareMessageBox.cs
- MenuItemAutomationPeer.cs
- ForwardPositionQuery.cs
- OpCopier.cs
- PolicyChain.cs
- hwndwrapper.cs
- TranslateTransform3D.cs
- UIInitializationException.cs
- LinkedResourceCollection.cs
- BindingSource.cs
- DependencyObjectProvider.cs
- WindowVisualStateTracker.cs
- TPLETWProvider.cs
- NotifyCollectionChangedEventArgs.cs
- ToolStrip.cs
- HtmlForm.cs
- ImageMap.cs
- ChildrenQuery.cs
- RegexStringValidator.cs
- ObjectSecurity.cs
- DataBindingList.cs
- BufferedReadStream.cs
- CompoundFileReference.cs
- OptimizerPatterns.cs
- NonClientArea.cs
- SocketConnection.cs
- LocalFileSettingsProvider.cs
- Bind.cs
- coordinator.cs
- XMLSyntaxException.cs
- ReadOnlyHierarchicalDataSource.cs
- DefaultExpressionVisitor.cs
- NewArrayExpression.cs
- GridItem.cs
- ListViewDeletedEventArgs.cs
- SessionState.cs
- ECDiffieHellmanPublicKey.cs
- GridViewCancelEditEventArgs.cs
- PrintDialogException.cs
- ThreadPool.cs
- ChangePassword.cs
- PackWebRequestFactory.cs
- TagMapInfo.cs
- EditingContext.cs
- XmlAttribute.cs
- StylusPointPropertyId.cs
- StringValidatorAttribute.cs
- WhiteSpaceTrimStringConverter.cs
- ContourSegment.cs
- ResourcesChangeInfo.cs
- StorageSetMapping.cs
- IPipelineRuntime.cs
- DataGridRow.cs
- EncryptedPackage.cs
- MenuEventArgs.cs
- ElapsedEventArgs.cs