Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / CommonUI / System / Drawing / RectangleConverter.cs / 1305376 / RectangleConverter.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
/*
*/
namespace System.Drawing {
using System.Runtime.Serialization.Formatters;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using Microsoft.Win32;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Globalization;
using System.Reflection;
///
/// RectangleConverter is a class that can be used to convert
/// rectangles from one data type to another. Access this
/// class through the TypeDescriptor.
///
public class RectangleConverter : 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);
}
///
/// Gets a value indicating whether this converter can
/// convert an object to the given destination type using the context.
///
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
if (destinationType == typeof(InstanceDescriptor)) {
return true;
}
return base.CanConvertTo(context, destinationType);
}
///
/// Converts the given object to the converter's native type.
///
[SuppressMessage("Microsoft.Performance", "CA1808:AvoidCallsThatBoxValueTypes")]
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {
string strValue = value as string;
if (strValue != null) {
string text = strValue.Trim();
if (text.Length == 0) {
return null;
}
else {
// Parse 4 integer values.
//
if (culture == null) {
culture = CultureInfo.CurrentCulture;
}
char sep = culture.TextInfo.ListSeparator[0];
string[] tokens = text.Split(new char[] {sep});
int[] values = new int[tokens.Length];
TypeConverter intConverter = TypeDescriptor.GetConverter(typeof(int));
for (int i = 0; i < values.Length; i++) {
// Note: ConvertFromString will raise exception if value cannot be converted.
values[i] = (int)intConverter.ConvertFromString(context, culture, tokens[i]);
}
if (values.Length == 4) {
return new Rectangle(values[0], values[1], values[2], values[3]);
}
else {
throw new ArgumentException(SR.GetString(SR.TextParseFailedFormat,
"text",
text,
"x, y, width, height"));
}
}
}
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( value is Rectangle ){
if (destinationType == typeof(string)) {
Rectangle rect = (Rectangle)value;
if (culture == null) {
culture = CultureInfo.CurrentCulture;
}
string sep = culture.TextInfo.ListSeparator + " ";
TypeConverter intConverter = TypeDescriptor.GetConverter(typeof(int));
string[] args = new string[4];
int nArg = 0;
// Note: ConvertToString will raise exception if value cannot be converted.
args[nArg++] = intConverter.ConvertToString(context, culture, rect.X);
args[nArg++] = intConverter.ConvertToString(context, culture, rect.Y);
args[nArg++] = intConverter.ConvertToString(context, culture, rect.Width);
args[nArg++] = intConverter.ConvertToString(context, culture, rect.Height);
return string.Join(sep, args);
}
if (destinationType == typeof(InstanceDescriptor)) {
Rectangle rect = (Rectangle)value;
ConstructorInfo ctor = typeof(Rectangle).GetConstructor(new Type[] {
typeof(int), typeof(int), typeof(int), typeof(int)});
if (ctor != null) {
return new InstanceDescriptor(ctor, new object[] {
rect.X, rect.Y, rect.Width, rect.Height});
}
}
}
return base.ConvertTo(context, culture, value, destinationType);
}
///
/// Creates an instance of this type given a set of property values
/// for the object. This is useful for objects that are immutable, but still
/// want to provide changable properties.
///
[SuppressMessage("Microsoft.Performance", "CA1808:AvoidCallsThatBoxValueTypes")]
[SuppressMessage("Microsoft.Security", "CA2102:CatchNonClsCompliantExceptionsInGeneralHandlers")]
public override object CreateInstance(ITypeDescriptorContext context, IDictionary propertyValues) {
if( propertyValues == null ){
throw new ArgumentNullException( "propertyValues" );
}
object x = propertyValues["X"];
object y = propertyValues["Y"];
object width = propertyValues["Width"];
object height = propertyValues["Height"];
if(x == null || y == null || width == null || height == null ||
!(x is int) || !(y is int) || !(width is int) || !(height is int) ) {
throw new ArgumentException(SR.GetString(SR.PropertyValueInvalidEntry));
}
return new Rectangle((int)x,
(int)y,
(int)width,
(int)height);
}
///
/// Determines if changing a value on this object should require a call to
/// CreateInstance to create a new value.
///
public override bool GetCreateInstanceSupported(ITypeDescriptorContext context) {
return true;
}
///
/// Retrieves the set of properties for this type. By default, a type has
/// does not return any properties. An easy implementation of this method
/// can just call TypeDescriptor.GetProperties for the correct data type.
///
public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object value, Attribute[] attributes) {
PropertyDescriptorCollection props = TypeDescriptor.GetProperties(typeof(Rectangle), attributes);
return props.Sort(new string[] {"X", "Y", "Width", "Height"});
}
///
/// Determines if this object supports properties. By default, this
/// is false.
///
public override bool GetPropertiesSupported(ITypeDescriptorContext context) {
return true;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
/*
*/
namespace System.Drawing {
using System.Runtime.Serialization.Formatters;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using Microsoft.Win32;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Globalization;
using System.Reflection;
///
/// RectangleConverter is a class that can be used to convert
/// rectangles from one data type to another. Access this
/// class through the TypeDescriptor.
///
public class RectangleConverter : 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);
}
///
/// Gets a value indicating whether this converter can
/// convert an object to the given destination type using the context.
///
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
if (destinationType == typeof(InstanceDescriptor)) {
return true;
}
return base.CanConvertTo(context, destinationType);
}
///
/// Converts the given object to the converter's native type.
///
[SuppressMessage("Microsoft.Performance", "CA1808:AvoidCallsThatBoxValueTypes")]
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {
string strValue = value as string;
if (strValue != null) {
string text = strValue.Trim();
if (text.Length == 0) {
return null;
}
else {
// Parse 4 integer values.
//
if (culture == null) {
culture = CultureInfo.CurrentCulture;
}
char sep = culture.TextInfo.ListSeparator[0];
string[] tokens = text.Split(new char[] {sep});
int[] values = new int[tokens.Length];
TypeConverter intConverter = TypeDescriptor.GetConverter(typeof(int));
for (int i = 0; i < values.Length; i++) {
// Note: ConvertFromString will raise exception if value cannot be converted.
values[i] = (int)intConverter.ConvertFromString(context, culture, tokens[i]);
}
if (values.Length == 4) {
return new Rectangle(values[0], values[1], values[2], values[3]);
}
else {
throw new ArgumentException(SR.GetString(SR.TextParseFailedFormat,
"text",
text,
"x, y, width, height"));
}
}
}
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( value is Rectangle ){
if (destinationType == typeof(string)) {
Rectangle rect = (Rectangle)value;
if (culture == null) {
culture = CultureInfo.CurrentCulture;
}
string sep = culture.TextInfo.ListSeparator + " ";
TypeConverter intConverter = TypeDescriptor.GetConverter(typeof(int));
string[] args = new string[4];
int nArg = 0;
// Note: ConvertToString will raise exception if value cannot be converted.
args[nArg++] = intConverter.ConvertToString(context, culture, rect.X);
args[nArg++] = intConverter.ConvertToString(context, culture, rect.Y);
args[nArg++] = intConverter.ConvertToString(context, culture, rect.Width);
args[nArg++] = intConverter.ConvertToString(context, culture, rect.Height);
return string.Join(sep, args);
}
if (destinationType == typeof(InstanceDescriptor)) {
Rectangle rect = (Rectangle)value;
ConstructorInfo ctor = typeof(Rectangle).GetConstructor(new Type[] {
typeof(int), typeof(int), typeof(int), typeof(int)});
if (ctor != null) {
return new InstanceDescriptor(ctor, new object[] {
rect.X, rect.Y, rect.Width, rect.Height});
}
}
}
return base.ConvertTo(context, culture, value, destinationType);
}
///
/// Creates an instance of this type given a set of property values
/// for the object. This is useful for objects that are immutable, but still
/// want to provide changable properties.
///
[SuppressMessage("Microsoft.Performance", "CA1808:AvoidCallsThatBoxValueTypes")]
[SuppressMessage("Microsoft.Security", "CA2102:CatchNonClsCompliantExceptionsInGeneralHandlers")]
public override object CreateInstance(ITypeDescriptorContext context, IDictionary propertyValues) {
if( propertyValues == null ){
throw new ArgumentNullException( "propertyValues" );
}
object x = propertyValues["X"];
object y = propertyValues["Y"];
object width = propertyValues["Width"];
object height = propertyValues["Height"];
if(x == null || y == null || width == null || height == null ||
!(x is int) || !(y is int) || !(width is int) || !(height is int) ) {
throw new ArgumentException(SR.GetString(SR.PropertyValueInvalidEntry));
}
return new Rectangle((int)x,
(int)y,
(int)width,
(int)height);
}
///
/// Determines if changing a value on this object should require a call to
/// CreateInstance to create a new value.
///
public override bool GetCreateInstanceSupported(ITypeDescriptorContext context) {
return true;
}
///
/// Retrieves the set of properties for this type. By default, a type has
/// does not return any properties. An easy implementation of this method
/// can just call TypeDescriptor.GetProperties for the correct data type.
///
public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object value, Attribute[] attributes) {
PropertyDescriptorCollection props = TypeDescriptor.GetProperties(typeof(Rectangle), attributes);
return props.Sort(new string[] {"X", "Y", "Width", "Height"});
}
///
/// Determines if this object supports properties. By default, this
/// is false.
///
public override bool GetPropertiesSupported(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
- SmtpClient.cs
- XMLDiffLoader.cs
- CompositeActivityMarkupSerializer.cs
- XmlSchemaAll.cs
- PeerNameResolver.cs
- ResourceCategoryAttribute.cs
- ListBase.cs
- DependencyPropertyConverter.cs
- BackgroundFormatInfo.cs
- SelectionListComponentEditor.cs
- ParseNumbers.cs
- PhonemeConverter.cs
- Image.cs
- StylusPointPropertyId.cs
- TableRow.cs
- SoapMessage.cs
- TextServicesContext.cs
- XmlDownloadManager.cs
- SystemWebSectionGroup.cs
- DragStartedEventArgs.cs
- TypeRestriction.cs
- ThreadExceptionEvent.cs
- WindowsStatic.cs
- QuotaThrottle.cs
- ObjectDataSourceFilteringEventArgs.cs
- CacheChildrenQuery.cs
- MSHTMLHost.cs
- Simplifier.cs
- ObjectStateEntryBaseUpdatableDataRecord.cs
- HttpProfileGroupBase.cs
- TypeConverterHelper.cs
- UpdateEventArgs.cs
- backend.cs
- PrefixHandle.cs
- FollowerQueueCreator.cs
- documentsequencetextcontainer.cs
- GridViewAutoFormat.cs
- CapabilitiesSection.cs
- MoveSizeWinEventHandler.cs
- FixedSOMSemanticBox.cs
- LicFileLicenseProvider.cs
- ScriptingRoleServiceSection.cs
- ResourceType.cs
- MultiTrigger.cs
- _TLSstream.cs
- DataObjectFieldAttribute.cs
- Crc32Helper.cs
- RawStylusInputReport.cs
- LocatorGroup.cs
- ToolStripSplitButton.cs
- CriticalFinalizerObject.cs
- OdbcHandle.cs
- MembershipUser.cs
- DrawListViewColumnHeaderEventArgs.cs
- ExceptionCollection.cs
- SerializableAttribute.cs
- SecurityAccessDeniedException.cs
- MessageSecurityTokenVersion.cs
- ToolboxBitmapAttribute.cs
- TreeViewCancelEvent.cs
- DataMemberConverter.cs
- FunctionQuery.cs
- QueryRewriter.cs
- RsaSecurityKey.cs
- WeakHashtable.cs
- FigureParaClient.cs
- ListViewInsertionMark.cs
- UserControlCodeDomTreeGenerator.cs
- PolicyManager.cs
- SoapSchemaMember.cs
- LineInfo.cs
- CheckBoxAutomationPeer.cs
- InvokeMemberBinder.cs
- EventLog.cs
- ProfessionalColorTable.cs
- CustomTypeDescriptor.cs
- SoapEnumAttribute.cs
- DecoderExceptionFallback.cs
- LayoutEvent.cs
- DbConnectionStringBuilder.cs
- ResolvedKeyFrameEntry.cs
- FormCollection.cs
- ResourceSet.cs
- Byte.cs
- ObjectNotFoundException.cs
- CellParagraph.cs
- EventSinkHelperWriter.cs
- Imaging.cs
- ImageListStreamer.cs
- SqlGatherConsumedAliases.cs
- MarkupCompilePass2.cs
- ThaiBuddhistCalendar.cs
- TimeSpanOrInfiniteConverter.cs
- ButtonColumn.cs
- DataRelationCollection.cs
- SqlServices.cs
- RSAOAEPKeyExchangeDeformatter.cs
- XsdSchemaFileEditor.cs
- ConfigurationCollectionAttribute.cs
- Hash.cs