/// <summary>
/// This should launch an open file dialog instead of the usual thing.
/// </summary>
/// <param name="context">System.ComponentModel.ITypeDescriptorContext</param>
/// <param name="provider">IServiceProvider</param>
/// <param name="value">The object being displayed</param>
/// <returns>A new version of the object if the dialog was ok.</returns>
public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, IServiceProvider provider, object value)
{
_context = context;
_original = value as IPolygonScheme;
_editCopy = _original.Copy();
IWindowsFormsEditorService dialogProvider = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
NamedList<IPolygonCategory> cats = new NamedList<IPolygonCategory>(_editCopy.Categories, "Category");
CollectionPropertyGrid frm = new CollectionPropertyGrid(cats);
frm.ChangesApplied += new EventHandler(frm_ChangesApplied);
frm.AddItemClicked += new EventHandler(frm_AddItemClicked);
dialogProvider.ShowDialog(frm);
return _original; // don't bother swapping out the edit copy, just store copies of the categories when changes are applied.
}
/// <summary>
/// This describes how to launch the form etc.
/// </summary>
/// <param name="context"></param>
/// <param name="provider"></param>
/// <param name="value"></param>
/// <returns></returns>
public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, IServiceProvider provider, object value)
{
_context = context;
IWindowsFormsEditorService dialogProvider = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
SQLExpressionDialog dlgExpression = new SQLExpressionDialog();
string original = (string)value;
dlgExpression.Expression = (string)value;
// Try to find the Table
IFeatureCategory category = context.Instance as IFeatureCategory;
if (category != null)
{
IFeatureScheme scheme = category.GetParentItem() as IFeatureScheme;
if (scheme != null)
{
IFeatureLayer layer = scheme.GetParentItem() as IFeatureLayer;
if (layer != null)
{
dlgExpression.Table = layer.DataSet.DataTable;
}
}
else
{
IFeatureLayer layer = category.GetParentItem() as IFeatureLayer;
if (layer != null)
{
dlgExpression.Table = layer.DataSet.DataTable;
}
}
}
dlgExpression.ChangesApplied += dlgExpression_ChangesApplied;
if (dialogProvider.ShowDialog(dlgExpression) != System.Windows.Forms.DialogResult.OK)
{
return original;
}
else
{
return dlgExpression.Expression;
}
}
public override bool GetCreateInstanceSupported(System.ComponentModel.ITypeDescriptorContext context)
{
throw null;
}
public override object ConvertTo(System.ComponentModel.ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, System.Type destinationType)
{
throw null;
}
public override bool CanConvertFrom(System.ComponentModel.ITypeDescriptorContext context, System.Type sourceType)
{
throw null;
}
/// <summary>
/// Returns whether this object supports a standard set of values that can be picked from a list, using the specified context.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"></see> that provides a format context.</param>
/// <returns>
/// true if <see cref="M:System.ComponentModel.TypeConverter.GetStandardValues"></see> should be called to find a common set of values the object supports; otherwise, <c>false</c>.
/// </returns>
public override bool GetStandardValuesSupported(System.ComponentModel.ITypeDescriptorContext context)
{
return(this.baseTypeConverter.GetStandardValuesSupported(context));
}
/// <summary>
/// Returns a collection of properties for the type of array specified by the value parameter, using the specified context and attributes.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"></see> that provides a format context.</param>
/// <param name="value">An <see cref="T:System.Object"></see> that specifies the type of array for which to get properties.</param>
/// <param name="attributes">An array of type <see cref="T:System.Attribute"></see> that is used as a filter.</param>
/// <returns>
/// A <see cref="T:System.ComponentModel.PropertyDescriptorCollection"></see> with the properties that are exposed for this data type, or null if there are no properties.
/// </returns>
public override System.ComponentModel.PropertyDescriptorCollection GetProperties(System.ComponentModel.ITypeDescriptorContext context, object value, Attribute[] attributes)
{
return(this.baseTypeConverter.GetProperties(context, value, attributes));
}
/// <summary>
/// Creates an instance of the type that this <see cref="T:System.ComponentModel.TypeConverter"></see> is associated with, using the specified context, given a set of property values for the object.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"></see> that provides a format context.</param>
/// <param name="propertyValues">An <see cref="T:System.Collections.IDictionary"></see> of new property values.</param>
/// <returns>
/// An <see cref="T:System.Object"></see> representing the given <see cref="T:System.Collections.IDictionary"></see>, or <c>null</c> if the object can not be created.
/// This method always returns <c>null</c>.
/// </returns>
public override object CreateInstance(System.ComponentModel.ITypeDescriptorContext context, System.Collections.IDictionary propertyValues)
{
return(baseTypeConverter.CreateInstance(context, propertyValues));
}
public virtual bool GetPropertiesSupported(System.ComponentModel.ITypeDescriptorContext context)
{
}
public virtual System.ComponentModel.PropertyDescriptorCollection GetProperties(System.ComponentModel.ITypeDescriptorContext context, object value, System.Attribute[] attributes)
{
}
public virtual bool GetCreateInstanceSupported(System.ComponentModel.ITypeDescriptorContext context)
{
}
public virtual object CreateInstance(System.ComponentModel.ITypeDescriptorContext context, System.Collections.IDictionary propertyValues)
{
}
public virtual object ConvertTo(System.ComponentModel.ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
{
}
public virtual bool GetStandardValuesSupported(System.ComponentModel.ITypeDescriptorContext context)
{
}
public virtual bool GetStandardValuesExclusive(System.ComponentModel.ITypeDescriptorContext context)
{
}
public virtual System.ComponentModel.TypeConverter.StandardValuesCollection GetStandardValues(System.ComponentModel.ITypeDescriptorContext context)
{
}
/// <summary>
/// Returns whether this converter can convert the object to the specified type, using the specified context.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"></see> that provides a format context.</param>
/// <param name="destinationType">A <see cref="T:System.Type"></see> that represents the type you want to convert to.</param>
/// <returns>
/// true if this converter can perform the conversion; otherwise, <c>false</c>.
/// </returns>
public override bool CanConvertTo(System.ComponentModel.ITypeDescriptorContext context,
Type destinationType)
{
return((destinationType == typeof(string)) || baseTypeConverter.CanConvertTo(context, destinationType));
}
public virtual bool IsValid(System.ComponentModel.ITypeDescriptorContext context, object value)
{
}
/// <summary>
/// Returns whether changing a value on this object requires a call to <see cref="M:System.ComponentModel.TypeConverter.CreateInstance(System.Collections.IDictionary)"></see> to create a new value, using the specified context.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"></see> that provides a format context.</param>
/// <returns>
/// true if changing a property on this object requires a call to <see cref="M:System.ComponentModel.TypeConverter.CreateInstance(System.Collections.IDictionary)"></see> to create a new value; otherwise, <c>false</c>.
/// </returns>
public override bool GetCreateInstanceSupported(System.ComponentModel.ITypeDescriptorContext context)
{
return(this.baseTypeConverter.GetCreateInstanceSupported(context));
}
public virtual bool CanConvertTo(System.ComponentModel.ITypeDescriptorContext context, Type destinationType)
{
}
/// <summary>
/// Returns a collection of standard values for the data type this type converter is designed for when provided with a format context.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"></see> that provides a format context that can be used to extract additional information about the environment from which this converter is invoked. This parameter or properties of this parameter can be null.</param>
/// <returns>
/// A <see cref="T:System.ComponentModel.TypeConverter.StandardValuesCollection"></see> that holds a standard set of valid values, or null if the data type does not support a standard set of values.
/// </returns>
public override StandardValuesCollection GetStandardValues(System.ComponentModel.ITypeDescriptorContext context)
{
return(this.baseTypeConverter.GetStandardValues(context));
}
// Methods
public virtual bool CanConvertFrom(System.ComponentModel.ITypeDescriptorContext context, Type sourceType)
{
}
public override bool GetPropertiesSupported(System.ComponentModel.ITypeDescriptorContext context)
{
throw null;
}
public object ConvertFromString(System.ComponentModel.ITypeDescriptorContext context, string text)
{
}
public override bool CanConvertTo(System.ComponentModel.ITypeDescriptorContext context, System.Type destinationType)
{
throw null;
}
public object ConvertFromString(System.ComponentModel.ITypeDescriptorContext context, System.Globalization.CultureInfo culture, string text)
{
}
public override object CreateInstance(System.ComponentModel.ITypeDescriptorContext context, System.Collections.IDictionary propertyValues)
{
throw null;
}
public string ConvertToInvariantString(System.ComponentModel.ITypeDescriptorContext context, object value)
{
}
public override System.ComponentModel.PropertyDescriptorCollection GetProperties(System.ComponentModel.ITypeDescriptorContext context, object value, System.Attribute[] attributes)
{
throw null;
}
/// <summary>
/// 获取由 EditValue 方法使用的编辑器样式
/// </summary>
/// <param name="context">可用于获取附加上下文信息的 ITypeDescriptorContext</param>
/// <returns>UITypeEditorEditStyle 值，指示 EditValue 方法使用的编辑器样式。 如果 UITypeEditor 不支持该方法，则 GetEditStyle 将返回 None</returns>
public override UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)
{
return(UITypeEditorEditStyle.Modal);
}
/// <summary>
/// Returns whether this converter can convert an object of the given type to the type of this converter, using the specified context.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"></see> that provides a format context.</param>
/// <param name="sourceType">A <see cref="T:System.Type"></see> that represents the type you want to convert from.</param>
/// <returns>
/// true if this converter can perform the conversion; otherwise, <c>false</c>.
/// </returns>
public override bool CanConvertFrom(System.ComponentModel.ITypeDescriptorContext context,
Type sourceType)
{
return((sourceType == typeof(string)) || baseTypeConverter.CanConvertFrom(context, sourceType));
}
public System.ComponentModel.PropertyDescriptorCollection GetProperties(System.ComponentModel.ITypeDescriptorContext context, object value)
{
}
