/// <summary>
/// Overrides the method used to provide basic behaviour for selecting editor.
/// Shows our custom control for editing the value.
/// </summary>
/// <param name = "context">The context of the editing control</param>
/// <param name = "provider">A valid service provider</param>
/// <param name = "value">The current value of the object to edit</param>
/// <returns>The new value of the object</returns>
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
if (context != null
&& context.Instance != null
&& provider != null)
{
edSvc = (IWindowsFormsEditorService)provider.GetService(typeof (IWindowsFormsEditorService));
if (edSvc != null)
{
// Create a CheckedListBox and populate it with all the enum values
clb = new CheckedListBox();
clb.BorderStyle = BorderStyle.FixedSingle;
clb.CheckOnClick = true;
clb.MouseDown += OnMouseDown;
clb.MouseMove += OnMouseMoved;
tooltipControl = new ToolTip();
tooltipControl.ShowAlways = true;
foreach (string name in Enum.GetNames(context.PropertyDescriptor.PropertyType))
{
// Get the enum value
object enumVal = Enum.Parse(context.PropertyDescriptor.PropertyType, name);
// Get the int value
int intVal = (int)Convert.ChangeType(enumVal, typeof (int));
// Get the description attribute for this field
FieldInfo fi = context.PropertyDescriptor.PropertyType.GetField(name);
DescriptionAttribute[] attrs =
(DescriptionAttribute[])fi.GetCustomAttributes(typeof (DescriptionAttribute), false);
// Store the the description
string tooltip = attrs.Length > 0 ? attrs[0].Description : string.Empty;
// Get the int value of the current enum value (the one being edited)
int intEdited = (int)Convert.ChangeType(value, typeof (int));
// Creates a clbItem that stores the name, the int value and the tooltip
clbItem item = new clbItem(enumVal.ToString(), intVal, tooltip);
// Get the checkstate from the value being edited
//bool checkedItem = (intEdited & intVal) > 0;
bool checkedItem = (intEdited & intVal) == intVal;
// Add the item with the right check state
clb.Items.Add(item, checkedItem);
}
// Show our CheckedListbox as a DropDownControl.
// This methods returns only when the dropdowncontrol is closed
edSvc.DropDownControl(clb);
// Get the sum of all checked flags
int result = 0;
foreach (clbItem obj in clb.CheckedItems)
{
//result += obj.Value;
result |= obj.Value;
}
// return the right enum value corresponding to the result
return Enum.ToObject(context.PropertyDescriptor.PropertyType, result);
}
}
return value;
}
/// <summary>
/// Overrides the method used to provide basic behaviour for selecting editor.
/// Shows our custom control for editing the value.
/// </summary>
/// <param name="context">The context of the editing control</param>
/// <param name="provider">A valid service provider</param>
/// <param name="value">The current value of the object to edit</param>
/// <returns>The new value of the object</returns>
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
if (context != null &&
context.Instance != null &&
provider != null)
{
edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
if (edSvc != null)
{
// Create a CheckedListBox and populate it with all the enum values
clb = new CheckedListBox();
clb.BorderStyle = BorderStyle.FixedSingle;
clb.CheckOnClick = true;
clb.MouseDown += new MouseEventHandler(this.OnMouseDown);
clb.MouseMove += new MouseEventHandler(this.OnMouseMoved);
tooltipControl = new ToolTip();
tooltipControl.ShowAlways = true;
foreach (string name in Enum.GetNames(context.PropertyDescriptor.PropertyType))
{
// Get the enum value
object enumVal = Enum.Parse(context.PropertyDescriptor.PropertyType, name);
// Get the int value
int intVal = (int)Convert.ChangeType(enumVal, typeof(int));
// Get the description attribute for this field
System.Reflection.FieldInfo fi = context.PropertyDescriptor.PropertyType.GetField(name);
DescriptionAttribute[] attrs = (DescriptionAttribute[])fi.GetCustomAttributes(typeof(DescriptionAttribute), false);
// Store the the description
string tooltip = attrs.Length > 0 ? attrs[0].Description : string.Empty;
// Get the int value of the current enum value (the one being edited)
int intEdited = (int)Convert.ChangeType(value, typeof(int));
// Creates a clbItem that stores the name, the int value and the tooltip
clbItem item = new clbItem(enumVal.ToString(), intVal, tooltip);
// Get the checkstate from the value being edited
bool checkedItem = (intEdited & intVal) > 0;
// Add the item with the right check state
clb.Items.Add(item, checkedItem);
}
// Show our CheckedListbox as a DropDownControl.
// This methods returns only when the dropdowncontrol is closed
edSvc.DropDownControl(clb);
// Get the sum of all checked flags
int result = 0;
foreach (clbItem obj in clb.CheckedItems)
{
result += obj.Value;
}
// return the right enum value corresponding to the result
return(Enum.ToObject(context.PropertyDescriptor.PropertyType, result));
}
}
return(value);
}
