/// <summary>
/// Edits the specified object's value using the editor style indicated by <seealso cref="UITypeEditor.GetEditStyle()"/>.
/// </summary>
/// <param name="context">
/// An <see cref="ITypeDescriptorContext"/> that can be used to gain additional context information.
/// </param>
/// <param name="provider">
/// An <see cref="IServiceProvider"/> that this editor can use to obtain services.
/// </param>
/// <param name="value">
/// The object to edit.
/// </param>
/// <returns>
/// The fully qualifed type name for the chosen type.
/// </returns>
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
Debug.Assert(provider != null, "No service provider; we cannot edit the value");
if (provider != null)
{
IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
Debug.Assert(edSvc != null, "No editor service; we cannot edit the value");
if (edSvc != null)
{
IWindowsFormsEditorService service = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
string currentTypeName = value as string;
Type currentType = (currentTypeName == null) ? value as Type : Type.GetType(currentTypeName, false);
BaseTypeAttribute baseTypeAttribute = GetBaseType(context);
using (TypeSelectorUI form = new TypeSelectorUI(currentType, baseTypeAttribute.BaseType, baseTypeAttribute.TypeSelectorIncludes, baseTypeAttribute.ConfigurationType))
{
if (service.ShowDialog(form) == DialogResult.OK)
{
if (form.SelectedType != null)
{
currentType = form.SelectedType;
}
}
}
if (currentType != null)
{
return(currentType.AssemblyQualifiedName);
}
}
}
return(value);
}
/// <summary>
/// <para>Edits the specified object's value using the editor style indicated by <seealso cref="UITypeEditor.GetEditStyle"/>.</para>
/// </summary>
/// <param name="context">
/// <para>An <see cref="ITypeDescriptorContext"/> that can be used to gain additional context information.</para>
/// </param>
/// <param name="provider">
/// <para>An <see cref="IServiceProvider"/> that this editor can use to obtain services.</para>
/// </param>
/// <param name="value">
/// <para>The object to edit.</para>
/// </param>
/// <returns>
/// The fully qualifed type name for the chosen type.
/// </returns>
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
Debug.Assert(provider != null, "No service provider; we cannot edit the value");
if (provider != null)
{
IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
Debug.Assert(edSvc != null, "No editor service; we cannot edit the value");
if (edSvc != null)
{
IWindowsFormsEditorService service = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
string currentTypeName = (string)value;
Type currentType = null;
if ((currentTypeName != null) && (currentTypeName.Length != 0))
{
currentType = Type.GetType(currentTypeName, false);
}
BaseTypeAttribute baseTypeAttribute = this.GetBaseType(context);
using (TypeSelectorUI form = new TypeSelectorUI(currentType, baseTypeAttribute.BaseType, baseTypeAttribute.IncludeFlags))
{
if (service.ShowDialog(form) == DialogResult.OK)
{
if (form.SelectedType != null)
{
currentTypeName = form.SelectedType.AssemblyQualifiedName;
}
}
}
return(currentTypeName);
}
}
return(value);
}
/// <devdoc>
/// Get the base type of the object to use to filter possible types.
/// </devdoc>
private static BaseTypeAttribute GetBaseType(ITypeDescriptorContext context)
{
BaseTypeAttribute baseTypeAttribute = null;
foreach (Attribute attribute in context.PropertyDescriptor.Attributes)
{
baseTypeAttribute = attribute as BaseTypeAttribute;
if (null != baseTypeAttribute)
{
break;
}
}
if (baseTypeAttribute == null)
{
throw new InvalidOperationException(Resources.ExceptionNoBaseTypeAttribute);
}
return(baseTypeAttribute);
}
/// <devdoc>
/// Get the base type of the object to use to filter possible types.
/// </devdoc>
private BaseTypeAttribute GetBaseType(ITypeDescriptorContext context)
{
BaseTypeAttribute baseTypeAttribute = null;
foreach (Attribute attribute in context.PropertyDescriptor.Attributes)
{
if (attribute is BaseTypeAttribute)
{
baseTypeAttribute = ((BaseTypeAttribute)attribute);
break;
}
}
if (baseTypeAttribute == null)
{
throw new InvalidOperationException(SR.ExceptionNoBaseTypeAttribute);
}
return(baseTypeAttribute);
}
