Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / OpacityConverter.cs / 1305376 / OpacityConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Runtime.Serialization.Formatters; using System.Runtime.Remoting; using System.Runtime.InteropServices; using Microsoft.Win32; using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Globalization; using System.Reflection; ////// /// OpacityConverter is a class that can be used to convert /// opacity values from one data type to another. Access this /// class through the TypeDescriptor. /// public class OpacityConverter : TypeConverter { ////// /// Determines if this converter can convert an object in the given source /// type to the native type of the converter. /// public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof(string)) { return true; } return base.CanConvertFrom(context, sourceType); } ////// /// Converts the given object to the converter's native type. /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (value is string) { string text = ((string)value).Replace('%', ' ').Trim(); double val = Double.Parse(text, CultureInfo.CurrentCulture); int indexOfPercent = ((string)value).IndexOf("%"); if (indexOfPercent > 0 && (val >= 0.0 && val <= 1.0)) { val /= 100.0; text = val.ToString(CultureInfo.CurrentCulture); } double percent = 1.0; try { percent = (double)TypeDescriptor.GetConverter(typeof(double)).ConvertFrom(context, culture, text); // assume they meant a percentage if it is > 1.0, else // they actually typed the correct double... // if (percent > 1.0) { percent /= 100.0; } } catch (FormatException e) { throw new FormatException(SR.GetString(SR.InvalidBoundArgument, "Opacity", text, "0%", "100%"), e); } // Now check to see if it is within our bounds. // if (percent < 0.0 || percent > 1.0) { throw new FormatException(SR.GetString(SR.InvalidBoundArgument, "Opacity", text, "0%", "100%")); } return percent; } return base.ConvertFrom(context, culture, value); } ////// /// 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)) { double val = (double)value; int perc = (int)(val * 100.0); return perc.ToString(CultureInfo.CurrentCulture) + "%"; } return base.ConvertTo(context, culture, value, destinationType); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Runtime.Serialization.Formatters; using System.Runtime.Remoting; using System.Runtime.InteropServices; using Microsoft.Win32; using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Globalization; using System.Reflection; ////// /// OpacityConverter is a class that can be used to convert /// opacity values from one data type to another. Access this /// class through the TypeDescriptor. /// public class OpacityConverter : TypeConverter { ////// /// Determines if this converter can convert an object in the given source /// type to the native type of the converter. /// public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof(string)) { return true; } return base.CanConvertFrom(context, sourceType); } ////// /// Converts the given object to the converter's native type. /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (value is string) { string text = ((string)value).Replace('%', ' ').Trim(); double val = Double.Parse(text, CultureInfo.CurrentCulture); int indexOfPercent = ((string)value).IndexOf("%"); if (indexOfPercent > 0 && (val >= 0.0 && val <= 1.0)) { val /= 100.0; text = val.ToString(CultureInfo.CurrentCulture); } double percent = 1.0; try { percent = (double)TypeDescriptor.GetConverter(typeof(double)).ConvertFrom(context, culture, text); // assume they meant a percentage if it is > 1.0, else // they actually typed the correct double... // if (percent > 1.0) { percent /= 100.0; } } catch (FormatException e) { throw new FormatException(SR.GetString(SR.InvalidBoundArgument, "Opacity", text, "0%", "100%"), e); } // Now check to see if it is within our bounds. // if (percent < 0.0 || percent > 1.0) { throw new FormatException(SR.GetString(SR.InvalidBoundArgument, "Opacity", text, "0%", "100%")); } return percent; } return base.ConvertFrom(context, culture, value); } ////// /// 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)) { double val = (double)value; int perc = (int)(val * 100.0); return perc.ToString(CultureInfo.CurrentCulture) + "%"; } return base.ConvertTo(context, culture, value, destinationType); } } } // 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
- recordstate.cs
- FacetChecker.cs
- EntityDataReader.cs
- safesecurityhelperavalon.cs
- ObjectSecurity.cs
- ValueChangedEventManager.cs
- SimpleWorkerRequest.cs
- Int16.cs
- ColorIndependentAnimationStorage.cs
- WebColorConverter.cs
- ToolTip.cs
- DefaultPropertyAttribute.cs
- AsyncInvokeContext.cs
- FlowPosition.cs
- ServiceModelEnumValidator.cs
- IgnoreDeviceFilterElementCollection.cs
- AsymmetricSignatureFormatter.cs
- SpecialFolderEnumConverter.cs
- ResourceLoader.cs
- XmlValidatingReaderImpl.cs
- RuleSetDialog.cs
- NamedPipeTransportSecurity.cs
- Permission.cs
- Single.cs
- RunWorkerCompletedEventArgs.cs
- Tile.cs
- DataExpression.cs
- IndicShape.cs
- UnwrappedTypesXmlSerializerManager.cs
- UpdatePanelTriggerCollection.cs
- DesignerActionUIStateChangeEventArgs.cs
- ReferenceEqualityComparer.cs
- SafeNativeMethods.cs
- NavigationWindowAutomationPeer.cs
- FontFamily.cs
- MetabaseServerConfig.cs
- ProcessHostMapPath.cs
- XmlSchemaInclude.cs
- XmlEntityReference.cs
- Shape.cs
- TextLine.cs
- InputMethod.cs
- PolicyLevel.cs
- DefaultValueTypeConverter.cs
- DataGridViewComboBoxColumn.cs
- EncoderBestFitFallback.cs
- Models.cs
- PlacementWorkspace.cs
- ThreadAbortException.cs
- Grid.cs
- AutomationElementCollection.cs
- UnionExpr.cs
- EventHandlerService.cs
- PeerCollaboration.cs
- WebPartConnectionsDisconnectVerb.cs
- SHA256Managed.cs
- NamespaceCollection.cs
- TrackingDataItem.cs
- SoapReflectionImporter.cs
- DocumentViewerAutomationPeer.cs
- AutoResizedEvent.cs
- SynchronizingStream.cs
- LogSwitch.cs
- SQLStringStorage.cs
- SafeArrayTypeMismatchException.cs
- OdbcConnectionPoolProviderInfo.cs
- DataGridRowHeader.cs
- NetTcpBindingCollectionElement.cs
- PreProcessInputEventArgs.cs
- DataRowChangeEvent.cs
- DefaultValueTypeConverter.cs
- Registry.cs
- SettingsPropertyValue.cs
- EdgeModeValidation.cs
- XmlAttributeOverrides.cs
- MachineKeySection.cs
- DbProviderFactory.cs
- ApplicationManager.cs
- FunctionCommandText.cs
- LicenseManager.cs
- GridProviderWrapper.cs
- WindowsAltTab.cs
- ElementUtil.cs
- TemplatedWizardStep.cs
- WebRequestModulesSection.cs
- StringAnimationUsingKeyFrames.cs
- InfoCardRSAOAEPKeyExchangeFormatter.cs
- NamespaceList.cs
- SignatureConfirmations.cs
- Cursors.cs
- IsolationInterop.cs
- InvalidCommandTreeException.cs
- DataExpression.cs
- BamlTreeNode.cs
- SoapExtensionTypeElementCollection.cs
- ParameterRefs.cs
- SignatureToken.cs
- KeyedPriorityQueue.cs
- OperationContext.cs
- XmlIncludeAttribute.cs