void onListKeyUp(KeyEventArgs args)
{
if (KeyboardHelper.IsKeyPressed(ModifierKeys.Control) && args.Key == Key.A)
{
if (Selection.Items.Count() == Items.Count())
{
SelectedItemIDs.Clear();
}
else
{
SelectedItemIDs.AddRange(Items.Select(Items => Items.Item.ItemId));
}
}
}
void onItemClicked(ItemClickedEventArgs args)
{
var curItem = args.Item;
var prevItem = previouslyClickedItem;
var isStrgPressed = KeyboardHelper.IsKeyPressed(ModifierKeys.Control);
var isShiftPressed = KeyboardHelper.IsKeyPressed(ModifierKeys.Shift);
var isAltPressed = KeyboardHelper.IsKeyPressed(ModifierKeys.Alt);
if (isAltPressed)
{
return;
}
if (isStrgPressed)
{
if (curItem.IsSelected)
{
SelectedItemIDs.Remove(curItem.Item.ItemId);
}
else
{
SelectedItemIDs.Add(curItem.Item.ItemId);
}
}
else if (isShiftPressed)
{
var section = this.Items.Subsection(curItem, prevItem);
if (section.All(item => item.IsSelected))
{
SelectedItemIDs.RemoveMany(section.Select(item => item.Item.ItemId));
}
else
{
SelectedItemIDs.AddRange(section.Select(item => item.Item.ItemId).Except(this.SelectedItemIDs.Items));
}
}
else
{
if (SelectedItemIDs.Count == 1 && SelectedItemIDs.Items.Contains(curItem.Item.ItemId))
{
return;
}
this.SelectedItemIDs.Clear();
SelectedItemIDs.Add(curItem.Item.ItemId);
}
previouslyClickedItem = curItem;
}