Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / WinForms / Managed / System / WinForms / OpacityConverter.cs / 1 / 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
- X509AudioLogo.cs
- FormattedTextSymbols.cs
- FileSystemEnumerable.cs
- ScriptReferenceBase.cs
- DataGridViewLayoutData.cs
- StateChangeEvent.cs
- MsiStyleLogWriter.cs
- ReadOnlyDataSourceView.cs
- BrowsableAttribute.cs
- DetailsViewUpdateEventArgs.cs
- CookielessHelper.cs
- QualificationDataItem.cs
- WebRequest.cs
- WindowsListViewScroll.cs
- StylusCaptureWithinProperty.cs
- RequestSecurityTokenForRemoteTokenFactory.cs
- EndpointDesigner.cs
- PenCursorManager.cs
- DataGridViewComboBoxEditingControl.cs
- SqlDependencyListener.cs
- parserscommon.cs
- WebPartCatalogAddVerb.cs
- CodeTypeDeclarationCollection.cs
- CngKey.cs
- PolicyValidator.cs
- PriorityItem.cs
- DataGridViewColumnDividerDoubleClickEventArgs.cs
- WebDescriptionAttribute.cs
- ToolStripItem.cs
- DynamicPropertyHolder.cs
- ConfigurationSectionGroupCollection.cs
- QueryExecutionOption.cs
- Rotation3DKeyFrameCollection.cs
- DataGridViewColumnConverter.cs
- EncodingInfo.cs
- WindowPattern.cs
- FormViewDeleteEventArgs.cs
- Roles.cs
- OutputCacheProfileCollection.cs
- AnimationStorage.cs
- Base64WriteStateInfo.cs
- precedingquery.cs
- SmtpReplyReader.cs
- StringValidatorAttribute.cs
- AdornedElementPlaceholder.cs
- HtmlInputRadioButton.cs
- CatalogZoneBase.cs
- _CommandStream.cs
- Normalization.cs
- Material.cs
- ShortcutKeysEditor.cs
- IListConverters.cs
- ObjectDataSourceMethodEventArgs.cs
- OperationCanceledException.cs
- ListMarkerLine.cs
- XmlSerializableWriter.cs
- AppSettingsSection.cs
- StringSorter.cs
- FilterQueryOptionExpression.cs
- ContextStaticAttribute.cs
- XmlSerializerVersionAttribute.cs
- ObjectSet.cs
- ComboBox.cs
- SoapSchemaImporter.cs
- AnnotationStore.cs
- SqlServer2KCompatibilityCheck.cs
- OleDbPermission.cs
- WebPartDisplayModeEventArgs.cs
- WhiteSpaceTrimStringConverter.cs
- PanelStyle.cs
- ellipse.cs
- StylusCollection.cs
- JournalEntryListConverter.cs
- PagesSection.cs
- EmbossBitmapEffect.cs
- NumberSubstitution.cs
- CodePrimitiveExpression.cs
- AspNetSynchronizationContext.cs
- RegexCode.cs
- IntPtr.cs
- InfoCardProofToken.cs
- CodeValidator.cs
- Application.cs
- CoreChannel.cs
- ParameterSubsegment.cs
- XmlCharCheckingWriter.cs
- WmlLabelAdapter.cs
- PolyBezierSegment.cs
- RemotingConfiguration.cs
- CharEnumerator.cs
- basemetadatamappingvisitor.cs
- VisualTarget.cs
- BounceEase.cs
- RegexParser.cs
- MediaPlayer.cs
- SwitchLevelAttribute.cs
- CreateSequenceResponse.cs
- DeviceSpecificChoiceCollection.cs
- GenericUriParser.cs
- GridViewAutoFormat.cs