private void Row_DoubleTapped(object sender, DoubleTappedRoutedEventArgs e)
{
var hitbox = (FrameworkElement)sender;
var item = (FileSystemElement)hitbox.Tag;
ItemDoubleTapped?.Invoke(this, item);
}
private void Window_KeyDown(object sender, KeyRoutedEventArgs args)
{
if (ItemsSource.Count == 0)
{
return;
}
var shiftDown = Window.Current.CoreWindow.GetKeyState(VirtualKey.Shift).HasFlag(CoreVirtualKeyStates.Down);
var ctrlDown = Window.Current.CoreWindow.GetKeyState(VirtualKey.Control).HasFlag(CoreVirtualKeyStates.Down);
switch (args.Key)
{
//Abort selection
case VirtualKey.Escape:
UnselectOldRows();
break;
//Select currently focused item
case VirtualKey.Space:
if (shiftDown)
{
SelectRowsBetween(FocusedItem);
}
else
{
ToggleSelect(FocusedItem);
}
break;
//Open/Navigate currently focused item
case VirtualKey.Enter:
ItemDoubleTapped?.Invoke(this, FocusedItem);
break;
case VirtualKey.Menu:
if (focusedRow != null)
{
OpenItemFlyout(FocusedItem, focusedRow, new Point(0, focusedRow.Height));
}
break;
//Move focus to next/previous element and keep it in view
case VirtualKey.Up:
case VirtualKey.Down:
case VirtualKey.W:
case VirtualKey.S:
//If there is a focused item take index of it
//If there is no focused item and no SelectedItems begin from start
//If there is no focused item but SelectedItems get the index of the last
var lastFocusedIndex = FocusedItem == null ?
SelectedItems.Count == 0 ? -1 : ItemsSource.IndexOf(SelectedItems.Last())
: ItemsSource.IndexOf(FocusedItem);
var up = args.Key == VirtualKey.Up || args.Key == VirtualKey.W;
var index = up ? lastFocusedIndex - 1 : lastFocusedIndex + 1; //Find next index depending on which button has been pressed
var condBoundings = up ? index >= 0 : index < ItemsSource.Count; //Check bounding 0 <= index < ItemsSource.Count
if (!condBoundings)
{
break; //Cancel move focus if next item would be out of bounds
}
if (ctrlDown)
{
//Select next row if ctrl was pressed
ToggleSelect(ItemsSource[index]);
//Select LastFocusedItem if its not selected
if (!SelectedItems.Contains(ItemsSource[lastFocusedIndex]))
{
ToggleSelect(ItemsSource[lastFocusedIndex]);
}
}
FocusRow(ItemsSource[index], true);
args.Handled = true; //Set event as handled (Prevents ScrollViewer from scrolling down/up)
break;
}
//Don't find FileSystemElemets which start with key pressed if modifiers have been pressed
if (ctrlDown || shiftDown)
{
return;
}
var focusItemIndex = ItemsSource.IndexOf(FocusedItem);
var key = args.Key.ToString().ToLower();
var firstItemIndex = -1;
var foundNextItem = false;
for (int i = 0; i < ItemsSource.Count; i++)
{
if (ItemsSource[i].Name.ToLower().StartsWith(key))
{
//To begin from first item again if last item with the key was found
if (firstItemIndex == -1)
{
firstItemIndex = i;
}
//Needs to be after currently focused item
if (i <= focusItemIndex)
{
continue;
}
UnselectOldRows();
TryScrollFocusSelect(ItemsSource[i]);
foundNextItem = true;
break;
}
}
if (!foundNextItem && firstItemIndex != -1)
{
UnselectOldRows();
TryScrollFocusSelect(ItemsSource[firstItemIndex]);
}
}
