public override void BeginEdit()
{
base.BeginEdit();
RadTextBoxEditorElement editorElement = (RadTextBoxEditorElement)this.EditorElement;
RadTextBoxItem textBoxItem = editorElement.TextBoxItem;
if (!VirtualGridTextBoxEditor.IsDarkTheme(this.OwnerElement))
{
int num = (int)editorElement.SetDefaultValueOverride(VisualElement.BackColorProperty, (object)Color.White);
}
RadControl radControl = this.EditorElement.ElementTree == null || this.EditorElement.ElementTree.Control == null ? (RadControl)null : this.EditorElement.ElementTree.Control as RadControl;
if (radControl != null && TelerikHelper.IsMaterialTheme(radControl.ThemeName))
{
textBoxItem.StretchVertically = true;
if (this.EditorElement.Parent != null)
{
this.EditorElement.Parent.UpdateLayout();
}
}
else
{
textBoxItem.StretchVertically = textBoxItem.Multiline;
}
textBoxItem.SelectAll();
textBoxItem.TextBoxControl.Focus();
textBoxItem.TextChanging += new TextChangingEventHandler(this.TextBoxItem_TextChanging);
textBoxItem.TextChanged += new EventHandler(this.TextBoxItem_TextChanged);
textBoxItem.KeyDown += new KeyEventHandler(this.TextBoxItem_KeyDown);
textBoxItem.KeyUp += new KeyEventHandler(this.TextBoxItem_KeyUp);
textBoxItem.MouseWheel += new MouseEventHandler(this.TextBoxItem_MouseWheel);
}
