///<summary>Creates a list box under given textBox filled with filtered list of recommended emails based on textBox.Text values.
///Key is used to navigate list indirectly.</summary>
private void RecommendedEmailHelper(ODtextBox textBox, Keys key)
{
if (_listHistoricContacts.Count == 0) //No recommendations to show.
{
return;
}
//The passed in textBox's tag points to the grid of options.
//The created grid's tag will point to the textBox.
if (textBox.Tag == null)
{
textBox.Tag = new ODGrid()
{
TranslationName = "",
};
}
ODGrid gridContacts = (ODGrid)textBox.Tag;
//textBox.Text could contain multiple email addresses.
//We only want to grab the last few characters as the filter string.
//[email protected],[email protected],emai => "emai" is the filter.
//When there is no comma, will just use what is currently in the textbox.
string emailFilter = textBox.Text.ToLower().Split(',').Last();
if (emailFilter.Length < 2) //Require at least 2 characters for now.
{
gridContacts.Hide(); //Even if not showing .Hide() won't harm anything.
textBox.Tag = null; //Reset tag so that initial logic runs again.
return;
}
#region Key navigation and filtering
switch (key)
{
case Keys.Enter: //Select currently highlighted recommendation.
if (gridContacts.Rows.Count == 0)
{
return;
}
CloseAndSetRecommendedContacts(gridContacts, true);
return;
case Keys.Up: //Navigate the recommendations from the textBox indirectly.
if (gridContacts.Rows.Count == 0)
{
return;
}
//gridContacts is multi select. We are navigating 1 row at a time so clear and set the selected index.
int index = Math.Max(gridContacts.GetSelectedIndex() - 1, 0);
gridContacts.SetSelected(false);
gridContacts.SetSelected(new int[] { index }, true);
gridContacts.ScrollToIndex(index);
break;
case Keys.Down: //Navigate the recommendations from the textBox indirectly.
if (gridContacts.Rows.Count == 0)
{
return;
}
//gridContacts is multi select. We are navigating 1 row at a time so clear and set the selected index.
index = Math.Min(gridContacts.GetSelectedIndex() + 1, gridContacts.Rows.Count - 1);
gridContacts.SetSelected(false);
gridContacts.SetSelected(new int[] { index }, true);
gridContacts.ScrollToIndex(index);
break;
default:
#region Filter recommendations
List <string> listFilteredContacts = _listHistoricContacts.FindAll(x => x.ToLower().Contains(emailFilter.ToLower()));
if (listFilteredContacts.Count == 0)
{
gridContacts.Hide(); //No options to show so make sure and hide the list box
textBox.Tag = null; //Reset tag.
return;
}
listFilteredContacts.Sort();
gridContacts.BeginUpdate();
if (gridContacts.Columns.Count == 0) //First time loading.
{
gridContacts.Columns.Add(new ODGridColumn());
}
gridContacts.Rows.Clear();
foreach (string email in listFilteredContacts)
{
ODGridRow row = new ODGridRow(email);
row.Tag = email;
gridContacts.Rows.Add(row);
}
gridContacts.EndUpdate();
gridContacts.SetSelected(0, true); //Force a selection.
#endregion
break;
}
#endregion
if (gridContacts.Tag != null) //Already initialized
{
return;
}
//When the text box losses focus, we close/hide the grid.
//TextBox_LostFocus event fires after the EmailAuto_Click event.
textBox.Leave += TextBox_LostFocus;
#region Grid Init
gridContacts.HeaderHeight = 0;
gridContacts.SelectionMode = GridSelectionMode.MultiExtended;
gridContacts.MouseClick += EmailAuto_Click;
gridContacts.Tag = textBox;
gridContacts.TitleHeight = 0;
gridContacts.Parent = this;
gridContacts.BringToFront();
Point menuPosition = textBox.Location;
menuPosition.X += 10;
menuPosition.Y += textBox.Height - 1;
gridContacts.Location = menuPosition;
gridContacts.Width = (int)(textBox.Width * 0.75);
gridContacts.SetSelected(0, true);
#endregion
gridContacts.Show();
}
