internal DropDownHolder(TypeEditorHost dropDownParent)
{
ShowInTaskbar = false;
ControlBox = false;
MinimizeBox = false;
MaximizeBox = false;
Text = String.Empty;
FormBorderStyle = FormBorderStyle.None;
StartPosition = FormStartPosition.Manual; // set this to avoid being moved when our handle is created.
_mouseHooker = new MouseHooker(this, this);
Visible = false;
BackColor = VSColorTheme.GetThemedColor(EnvironmentColors.ComboBoxBackgroundColorKey);
_dropDownParent = dropDownParent;
}
/// <summary>
/// Edit control displayed in the TypeEditorHost. Just a TextBox with some addtional
/// key message processing for opening the drop down.
/// </summary>
public TypeEditorHostTextBox(TypeEditorHost dropDownParent)
{
_dropDownParent = dropDownParent;
BackColor = VSColorTheme.GetThemedColor(EnvironmentColors.ComboBoxBackgroundColorKey);
ForeColor = VSColorTheme.GetThemedColor(EnvironmentColors.ComboBoxTextColorKey);
}
/// <summary>
/// Factory method for creating the appropriate drop-down control based on the given property descriptor.
/// If the property descriptor supports a UITypeEditor, a TypeEditorHost will be created with that editor.
/// If not, and the TypeConverver attached to the PropertyDescriptor supports standard values, a
/// TypeEditorHostListBox will be created with this TypeConverter.
/// </summary>
/// <param name="propertyDescriptor">A property descriptor describing the property being set</param>
/// <param name="instance">The object instance being edited</param>
/// <param name="editControlStyle">The type of control to show in the edit area.</param>
/// <returns>A TypeEditorHost instance if the given property descriptor supports it, null otherwise.</returns>
public static TypeEditorHost Create(
PropertyDescriptor propertyDescriptor, object instance, TypeEditorHostEditControlStyle editControlStyle)
{
TypeEditorHost dropDown = null;
if (propertyDescriptor != null)
{
var uiTypeEditor = propertyDescriptor.GetEditor(typeof(UITypeEditor)) as UITypeEditor;
if (uiTypeEditor != null) // UITypeEditor case
{
dropDown = new TypeEditorHost(uiTypeEditor, propertyDescriptor, instance, editControlStyle);
}
else
{
var converter = propertyDescriptor.Converter;
if (converter != null
&& converter.GetStandardValuesSupported(null)) // converter case
{
dropDown = new TypeEditorHostListBox(converter, propertyDescriptor, instance, editControlStyle);
}
}
}
return dropDown;
}