Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / WinForms / Managed / System / WinForms / ImageIndexConverter.cs / 1 / ImageIndexConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using Microsoft.Win32; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Diagnostics; using System.Globalization; using System.Reflection; ////// /// ImageIndexConverter is a class that can be used to convert /// image index values one data type to another. /// public class ImageIndexConverter : Int32Converter { private string parentImageListProperty = "Parent"; ///protected virtual bool IncludeNoneAsStandardValue { get { return true; } } /// /// this is the property to look at when there is no ImageList property /// on the current object. For example, in ToolBarButton - the ImageList is /// on the ToolBarButton.Parent property. In WinBarItem, the ImageList is on /// the WinBarItem.Owner property. /// internal string ParentImageListProperty { get { return parentImageListProperty; } set { parentImageListProperty = value; } } ////// /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { String stringValue = value as String; if (stringValue != null && String.Compare(stringValue, SR.GetString(SR.toStringNone), true, culture) == 0) { return -1; } return base.ConvertFrom(context, culture, value); } ////// Converts the given value object to a 32-bit signed integer object. /// ////// /// Converts the given object to another type. The most common types to convert /// are to and from a string object. The default implementation will make a call /// to ToString on the object if the object is valid and if the destination /// type is string. If this cannot convert to the desitnation type, this will /// throw a NotSupportedException. /// public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (destinationType == null) { throw new ArgumentNullException("destinationType"); } if (destinationType == typeof(string) && value is int && ((int)value) == -1) { return SR.GetString(SR.toStringNone); } return base.ConvertTo(context, culture, value, destinationType); } ////// /// Retrieves a collection containing a set of standard values /// for the data type this validator is designed for. This /// will return null if the data type does not support a /// standard set of values. /// public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) { if (context != null && context.Instance != null) { object instance = context.Instance; PropertyDescriptor imageListProp = ImageListUtils.GetImageListProperty(context.PropertyDescriptor, ref instance); while (instance != null && imageListProp == null) { PropertyDescriptorCollection props = TypeDescriptor.GetProperties(instance); foreach (PropertyDescriptor prop in props) { if (typeof(ImageList).IsAssignableFrom(prop.PropertyType)) { imageListProp = prop; break; } } if (imageListProp == null) { // We didn't find the image list in this component. See if the // component has a "parent" property. If so, walk the tree... // PropertyDescriptor parentProp = props[ParentImageListProperty]; if (parentProp != null) { instance = parentProp.GetValue(instance); } else { // Stick a fork in us, we're done. // instance = null; } } } if (imageListProp != null) { ImageList imageList = (ImageList)imageListProp.GetValue(instance); if (imageList != null) { // Create array to contain standard values // object[] values; int nImages = imageList.Images.Count; if (IncludeNoneAsStandardValue) { values = new object[nImages + 1]; values[nImages] = -1; } else { values = new object[nImages]; } // Fill in the array // for (int i = 0; i < nImages; i++) { values[i] = i; } return new StandardValuesCollection(values); } } } if (IncludeNoneAsStandardValue) { return new StandardValuesCollection(new object[] {-1}); } else { return new StandardValuesCollection(new object[0]); } } ////// /// Determines if the list of standard values returned from /// GetStandardValues is an exclusive list. If the list /// is exclusive, then no other values are valid, such as /// in an enum data type. If the list is not exclusive, /// then there are other valid values besides the list of /// standard values GetStandardValues provides. /// public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) { return false; } ////// /// Determines if this object supports a standard set of values /// that can be picked from a list. /// public override bool GetStandardValuesSupported(ITypeDescriptorContext context) { return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using Microsoft.Win32; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Diagnostics; using System.Globalization; using System.Reflection; ////// /// ImageIndexConverter is a class that can be used to convert /// image index values one data type to another. /// public class ImageIndexConverter : Int32Converter { private string parentImageListProperty = "Parent"; ///protected virtual bool IncludeNoneAsStandardValue { get { return true; } } /// /// this is the property to look at when there is no ImageList property /// on the current object. For example, in ToolBarButton - the ImageList is /// on the ToolBarButton.Parent property. In WinBarItem, the ImageList is on /// the WinBarItem.Owner property. /// internal string ParentImageListProperty { get { return parentImageListProperty; } set { parentImageListProperty = value; } } ////// /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { String stringValue = value as String; if (stringValue != null && String.Compare(stringValue, SR.GetString(SR.toStringNone), true, culture) == 0) { return -1; } return base.ConvertFrom(context, culture, value); } ////// Converts the given value object to a 32-bit signed integer object. /// ////// /// Converts the given object to another type. The most common types to convert /// are to and from a string object. The default implementation will make a call /// to ToString on the object if the object is valid and if the destination /// type is string. If this cannot convert to the desitnation type, this will /// throw a NotSupportedException. /// public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (destinationType == null) { throw new ArgumentNullException("destinationType"); } if (destinationType == typeof(string) && value is int && ((int)value) == -1) { return SR.GetString(SR.toStringNone); } return base.ConvertTo(context, culture, value, destinationType); } ////// /// Retrieves a collection containing a set of standard values /// for the data type this validator is designed for. This /// will return null if the data type does not support a /// standard set of values. /// public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) { if (context != null && context.Instance != null) { object instance = context.Instance; PropertyDescriptor imageListProp = ImageListUtils.GetImageListProperty(context.PropertyDescriptor, ref instance); while (instance != null && imageListProp == null) { PropertyDescriptorCollection props = TypeDescriptor.GetProperties(instance); foreach (PropertyDescriptor prop in props) { if (typeof(ImageList).IsAssignableFrom(prop.PropertyType)) { imageListProp = prop; break; } } if (imageListProp == null) { // We didn't find the image list in this component. See if the // component has a "parent" property. If so, walk the tree... // PropertyDescriptor parentProp = props[ParentImageListProperty]; if (parentProp != null) { instance = parentProp.GetValue(instance); } else { // Stick a fork in us, we're done. // instance = null; } } } if (imageListProp != null) { ImageList imageList = (ImageList)imageListProp.GetValue(instance); if (imageList != null) { // Create array to contain standard values // object[] values; int nImages = imageList.Images.Count; if (IncludeNoneAsStandardValue) { values = new object[nImages + 1]; values[nImages] = -1; } else { values = new object[nImages]; } // Fill in the array // for (int i = 0; i < nImages; i++) { values[i] = i; } return new StandardValuesCollection(values); } } } if (IncludeNoneAsStandardValue) { return new StandardValuesCollection(new object[] {-1}); } else { return new StandardValuesCollection(new object[0]); } } ////// /// Determines if the list of standard values returned from /// GetStandardValues is an exclusive list. If the list /// is exclusive, then no other values are valid, such as /// in an enum data type. If the list is not exclusive, /// then there are other valid values besides the list of /// standard values GetStandardValues provides. /// public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) { return false; } ////// /// Determines if this object supports a standard set of values /// that can be picked from a list. /// public override bool GetStandardValuesSupported(ITypeDescriptorContext context) { return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- Listbox.cs
- XPathNavigator.cs
- FixedHyperLink.cs
- NamedElement.cs
- EncoderNLS.cs
- LinearKeyFrames.cs
- CacheOutputQuery.cs
- Substitution.cs
- DataMemberAttribute.cs
- IListConverters.cs
- CheckPair.cs
- RenderingBiasValidation.cs
- InitializationEventAttribute.cs
- login.cs
- DetailsViewRowCollection.cs
- IncrementalReadDecoders.cs
- CapabilitiesState.cs
- ResourceProviderFactory.cs
- EntityWrapperFactory.cs
- ComponentCommands.cs
- SafeRightsManagementSessionHandle.cs
- OleDbConnectionFactory.cs
- ActiveXHelper.cs
- XmlSerializerSection.cs
- PatternMatchRules.cs
- TimeSpanMinutesConverter.cs
- LeftCellWrapper.cs
- SystemThemeKey.cs
- RequestSecurityToken.cs
- DiscriminatorMap.cs
- TimelineCollection.cs
- XamlReaderHelper.cs
- EpmHelper.cs
- WebPartZoneBase.cs
- PathNode.cs
- SessionStateSection.cs
- ListViewCommandEventArgs.cs
- localization.cs
- TextParaLineResult.cs
- UIAgentMonitor.cs
- CustomActivityDesigner.cs
- RectAnimation.cs
- SingleResultAttribute.cs
- WebPartConnectionsDisconnectVerb.cs
- MasterPageParser.cs
- ObjectListTitleAttribute.cs
- CheckoutException.cs
- TextChange.cs
- HebrewNumber.cs
- WebDisplayNameAttribute.cs
- WCFServiceClientProxyGenerator.cs
- InternalConfigSettingsFactory.cs
- FixedTextSelectionProcessor.cs
- PageHandlerFactory.cs
- SqlConnection.cs
- CreateUserWizardAutoFormat.cs
- GenericsNotImplementedException.cs
- ContentHostHelper.cs
- SegmentInfo.cs
- SourceFileBuildProvider.cs
- EntityDataSourceContainerNameItem.cs
- HttpContextServiceHost.cs
- hresults.cs
- HandledEventArgs.cs
- ConnectionStringsExpressionBuilder.cs
- SystemWebExtensionsSectionGroup.cs
- BuildResultCache.cs
- IsolatedStorageFile.cs
- WebConfigurationManager.cs
- OperationCanceledException.cs
- RelationshipConverter.cs
- Message.cs
- ScriptRef.cs
- DbLambda.cs
- WebMethodAttribute.cs
- MembershipPasswordException.cs
- Encoder.cs
- PackageRelationshipCollection.cs
- DrawToolTipEventArgs.cs
- XmlSerializerFactory.cs
- TargetPerspective.cs
- DesignerContextDescriptor.cs
- UserControl.cs
- CodeGenerator.cs
- XmlSchemaIdentityConstraint.cs
- QueryContext.cs
- CacheDict.cs
- contentDescriptor.cs
- StringConverter.cs
- TypeLoadException.cs
- EventLogWatcher.cs
- ToolStripScrollButton.cs
- HMAC.cs
- ScrollChangedEventArgs.cs
- VectorAnimation.cs
- TiffBitmapEncoder.cs
- TextElementCollection.cs
- SatelliteContractVersionAttribute.cs
- PrintControllerWithStatusDialog.cs
- FileAuthorizationModule.cs