private void Listbox_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button != MouseButtons.Left)
{
return;
}
ThisIndexHasBeenChangedProgrammatically = -1;
if (Listbox.SelectedIndex == -1) //true when nothing is selected
{
}
else if (!CheckIfThumbMouseButtonsHaveBeenPressed(e))
{
if (Listbox.Items.Count > 0)
{
Listbox.MouseDown -= Listbox_MouseDown;
_mouseUpIndex = Listbox.IndexFromPoint(Listbox.PointToClient(Cursor.Position));
HandleSelectionChange();
if (Listbox.SelectedIndex != -1)
{
OnSelectionReady?.Invoke(this, EventArgs.Empty);
}
}
}
Listbox.SelectedIndexChanged += Listbox_SelectedIndexChanged;
}
/// <summary>
/// Handles only single selection with keyboard.
/// </summary>
public void HandleKeyUp(int selectedIndex)
{
OnSelectionNotReady?.Invoke(this, EventArgs.Empty);
Listbox.SelectedIndexChanged -= Listbox_SelectedIndexChanged;
Listbox.SelectedIndex = selectedIndex;
if (Listbox.SelectedIndex == -1)
{
OnSelectionReady?.Invoke(this, EventArgs.Empty);
}
else
{
_mouseDownIndex = selectedIndex;
_mouseUpIndex = selectedIndex;
SelectionOld = GetListboxItemsSelection(Listbox.Items.Count, Listbox.SelectedIndices);
SelectedItemsOrdered?.Clear();
SelectedItemsOrdered = new List <string> {
Listbox.SelectedItem.ToString()
};
SelectedIndexesOrdered?.Clear();
SelectedIndexesOrdered = new List <int> {
Listbox.SelectedIndex
};
HandleSelectionChange();
OnSelectionReady?.Invoke(this, EventArgs.Empty);
}
Listbox.SelectedIndexChanged += Listbox_SelectedIndexChanged;
}
