private void AssociatedObject_PreviewKeyDown(object sender, KeyEventArgs e)
{
if (!AutoCompletePopup.IsOpen)
{
return;
}
bool close = false;
switch (e.Key)
{
case Key.Escape:
close = true;
break;
case Key.Return:
InsertText();
close = true;
break;
case Key.Up:
AutoCompleteBox.SelectedIndex--;
e.Handled = true;
break;
case Key.Down:
AutoCompleteBox.SelectedIndex++;
e.Handled = true;
break;
case Key.Back:
if (FilterText.Length > 0)
{
FilterText = FilterText.Substring(0, FilterText.Length - 1);
}
else
{
close = true;
}
break;
}
int itemCount = FilteredItems.Count();
if (AutoCompleteBox.SelectedIndex < 0)
{
AutoCompleteBox.SelectedIndex = itemCount - 1;
}
if (AutoCompleteBox.SelectedIndex >= itemCount)
{
AutoCompleteBox.SelectedIndex = 0;
}
if (close)
{
e.Handled = true;
CloseAutoCompleteBox();
}
}
/// <summary>
/// Populates the list of filter vars with those that match the VarNames found in the provided list of questions.
/// </summary>
/// <param name="questions"></param>
private void GetFilterVars(List <SurveyQuestion> questions)
{
string filterVar;
int filterVarPos = 0;
int filterVarLen;
string filterExp; // the filter expression of the variable e.g. [varname]=1, 2, 8 or 9.
string[] filterOptionsList;
string options;
Regex rx;
MatchCollection results;
while (!FilterText.Equals(""))
{
FilterVar fv;
foreach (SurveyQuestion q in questions)
{
filterVar = q.VarName.RefVarName;
if (!FilterText.Contains(filterVar))
{
continue;
}
rx = new Regex(filterVar + "(=|<|>|<>)" +
"(([0-9]+(,\\s[0-9]+)+\\sor\\s[0-9]+)" +
"|([0-9]+\\sor\\s[0-9]+)" +
"|([0-9]+\\-[0-9]+)" +
"|([0-9]+))");
filterVarPos = FilterText.IndexOf(filterVar);
filterVarLen = filterVar.Length;
results = rx.Matches(FilterText);
if (results.Count > 0)
{
filterExp = results[0].Value;
options = filterExp.Substring(filterVarLen + 1);
options = Regex.Replace(options, "[^0-9 <->]", "");
filterOptionsList = GetOptionList(options).Split(' ');
fv = new FilterVar();
fv.Varname = filterVar;
if (filterOptionsList.Length != 0)
{
fv.ResponseCodes = filterOptionsList.Select(Int32.Parse).ToList();
}
// add to the list of filter vars if it is not already there
if (!FilterVars.Contains(fv))
{
FilterVars.Add(fv);
}
}
else
{
filterVarPos = 0;
continue;
}
filterVarPos = 0;
// trim the filterText to the point after this VarName
FilterText = FilterText.Substring(filterVarPos + filterVarLen);
}
if (filterVarPos == 0)
{
break;
}
}
}
