/// <summary>
/// Returns an instance of popup
/// </summary>
private void PreparePopup()
{
//if already initialized then exit method
if (isInitialized)
{
return;
}
//set the popup placement target
suggestionPopup.PlacementTarget = sourceTextBox;
//assign the width to textbox width
suggestionListBox.Width = sourceTextBox.ActualWidth;
//see if we have a suggestion provider
if (suggestionProvider == null)
{
//try to retrieve it from the text box
suggestionProvider = sourceTextBox.GetValue(SuggestionBoxBehavior.ProviderProperty) as ISuggestionProvider;
//see if we get one
if (suggestionProvider == null)
{
//if not then create a basic string suggestion provider
suggestionProvider = new StringSuggestionProvider();
}
//get the number of results property and assign to provider
suggestionProvider.NumberOfResults = (int)sourceTextBox.GetValue(SuggestionBoxBehavior.NumberOfResultsProperty);
}
//fetch the item template and apply to listbox
suggestionListBox.ItemTemplate = sourceTextBox.GetValue(SuggestionBoxBehavior.ItemTemplateProperty) as DataTemplate;
//see if we have datasource
if (suggestionSource == null)
{
//if not then retrieve the masterlist of textbox
IEnumerable assignedDataSource = (IEnumerable)sourceTextBox.GetValue(SuggestionBoxBehavior.MasterListProperty);
//use provider to generate the suggestion view source
suggestionSource = suggestionProvider.ProvideDataView(assignedDataSource);
}
//assign the sugegstion view to listbox
suggestionListBox.SetValue(ListBox.ItemsSourceProperty, suggestionSource);
//mark the flag
isInitialized = true;
}
