Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / CommonUI / System / Drawing / PointConverter.cs / 1305376 / PointConverter.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;
///
/// PointConverter is a class that can be used to convert
/// Point from one data type to another. Access this
/// class through the TypeDescriptor.
///
public class PointConverter : 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 2 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 == 2) {
return new Point(values[0], values[1]);
}
else {
throw new ArgumentException(SR.GetString(SR.TextParseFailedFormat,
text,
"x, y"));
}
}
}
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 Point){
if (destinationType == typeof(string)) {
Point pt = (Point)value;
if (culture == null) {
culture = CultureInfo.CurrentCulture;
}
string sep = culture.TextInfo.ListSeparator + " ";
TypeConverter intConverter = TypeDescriptor.GetConverter(typeof(int));
string[] args = new string[2];
int nArg = 0;
// Note: ConvertToString will raise exception if value cannot be converted.
args[nArg++] = intConverter.ConvertToString(context, culture, pt.X);
args[nArg++] = intConverter.ConvertToString(context, culture, pt.Y);
return string.Join(sep, args);
}
if (destinationType == typeof(InstanceDescriptor)) {
Point pt = (Point)value;
ConstructorInfo ctor = typeof(Point).GetConstructor(new Type[] {typeof(int), typeof(int)});
if (ctor != null) {
return new InstanceDescriptor(ctor, new object[] {pt.X, pt.Y});
}
}
}
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"];
if(x == null || y == null ||
!(x is int) || !(y is int)) {
throw new ArgumentException(SR.GetString(SR.PropertyValueInvalidEntry));
}
return new Point((int)x,
(int)y);
}
///
/// 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(Point), attributes);
return props.Sort(new string[] {"X", "Y"});
}
///
/// 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;
///
/// PointConverter is a class that can be used to convert
/// Point from one data type to another. Access this
/// class through the TypeDescriptor.
///
public class PointConverter : 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 2 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 == 2) {
return new Point(values[0], values[1]);
}
else {
throw new ArgumentException(SR.GetString(SR.TextParseFailedFormat,
text,
"x, y"));
}
}
}
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 Point){
if (destinationType == typeof(string)) {
Point pt = (Point)value;
if (culture == null) {
culture = CultureInfo.CurrentCulture;
}
string sep = culture.TextInfo.ListSeparator + " ";
TypeConverter intConverter = TypeDescriptor.GetConverter(typeof(int));
string[] args = new string[2];
int nArg = 0;
// Note: ConvertToString will raise exception if value cannot be converted.
args[nArg++] = intConverter.ConvertToString(context, culture, pt.X);
args[nArg++] = intConverter.ConvertToString(context, culture, pt.Y);
return string.Join(sep, args);
}
if (destinationType == typeof(InstanceDescriptor)) {
Point pt = (Point)value;
ConstructorInfo ctor = typeof(Point).GetConstructor(new Type[] {typeof(int), typeof(int)});
if (ctor != null) {
return new InstanceDescriptor(ctor, new object[] {pt.X, pt.Y});
}
}
}
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"];
if(x == null || y == null ||
!(x is int) || !(y is int)) {
throw new ArgumentException(SR.GetString(SR.PropertyValueInvalidEntry));
}
return new Point((int)x,
(int)y);
}
///
/// 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(Point), attributes);
return props.Sort(new string[] {"X", "Y"});
}
///
/// 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
- CustomAttributeFormatException.cs
- FrugalMap.cs
- ProvidersHelper.cs
- ToolStripSeparator.cs
- PropertyToken.cs
- DbProviderFactories.cs
- ToolStripGrip.cs
- XmlSchemaAppInfo.cs
- XmlSerializerNamespaces.cs
- ActivityPropertyReference.cs
- SecurityTokenRequirement.cs
- BitmapMetadataBlob.cs
- RouteParser.cs
- COM2PictureConverter.cs
- ExtendedPropertyDescriptor.cs
- ComplexLine.cs
- OrderPreservingPipeliningMergeHelper.cs
- PermissionListSet.cs
- MenuItemCollection.cs
- InstalledVoice.cs
- RangeValueProviderWrapper.cs
- CqlLexer.cs
- PerfService.cs
- FreeFormPanel.cs
- TextBounds.cs
- PersonalizationProviderHelper.cs
- SchemaDeclBase.cs
- Container.cs
- MultiSelectRootGridEntry.cs
- Pointer.cs
- DispatchWrapper.cs
- SingleKeyFrameCollection.cs
- CharacterMetricsDictionary.cs
- DoubleAnimationUsingPath.cs
- FileDialog.cs
- ColorAnimationBase.cs
- SystemSounds.cs
- DbConnectionPool.cs
- BindingsCollection.cs
- LocalizedNameDescriptionPair.cs
- wgx_commands.cs
- PropertiesTab.cs
- UIElement.cs
- PrePostDescendentsWalker.cs
- CapabilitiesUse.cs
- URLBuilder.cs
- DynamicMethod.cs
- WebServiceTypeData.cs
- FacetValues.cs
- ListDictionaryInternal.cs
- DataGridViewBand.cs
- ToolBarButtonClickEvent.cs
- ComboBox.cs
- AppSettingsExpressionBuilder.cs
- VectorCollectionValueSerializer.cs
- EdmToObjectNamespaceMap.cs
- ServerProtocol.cs
- _DisconnectOverlappedAsyncResult.cs
- ItemsControlAutomationPeer.cs
- ServerIdentity.cs
- StandardOleMarshalObject.cs
- QilVisitor.cs
- ColumnMapCopier.cs
- DataBindingCollection.cs
- Exceptions.cs
- XPathNodeIterator.cs
- MenuItemStyleCollection.cs
- BrowserDefinition.cs
- LayoutEditorPart.cs
- DisplayInformation.cs
- EasingKeyFrames.cs
- DataGrid.cs
- FilterUserControlBase.cs
- ValueConversionAttribute.cs
- ColumnReorderedEventArgs.cs
- DataGridViewCellLinkedList.cs
- ToolStripPanelCell.cs
- TdsParserSessionPool.cs
- StateMachineSubscriptionManager.cs
- ContextStack.cs
- RichTextBox.cs
- DataBinding.cs
- XPathScanner.cs
- WindowsSecurityTokenAuthenticator.cs
- DirtyTextRange.cs
- WindowsFormsSectionHandler.cs
- ToolStripDropDownMenu.cs
- ReadOnlyPropertyMetadata.cs
- EntryWrittenEventArgs.cs
- SqlDataAdapter.cs
- LoginViewDesigner.cs
- XPathNavigatorKeyComparer.cs
- smtppermission.cs
- BuildManager.cs
- Receive.cs
- _FixedSizeReader.cs
- FieldAccessException.cs
- SqlDataSourceView.cs
- SupportingTokenProviderSpecification.cs
- SHA1.cs