/// <summary>
/// Selects <paramref name="selectable"/> and considers the Control/Shift buttons.
/// </summary>
/// <param name="selectionService"></param>
/// <param name="selectable"></param>
public static void SelectWithKeyboardModifiers(this ISelectionService selectionService, ISelectable selectable)
{
if (selectionService == null)
{
return;
}
if (selectable == null)
{
return;
}
//Determine if we're adding to the selection
var isAddingToSelection = Keyboard.Modifiers == ModifierKeys.Control ||
Keyboard.Modifiers == ModifierKeys.Shift;
//See if this item is aready selected
if (selectable.IsSelected)
{
//It is selected. Unselect it.
selectionService.Unselect(selectable);
}
else
{
//Unless we're adding to the selection, unselect everything.
if (!isAddingToSelection)
{
selectionService.SelectNone();
}
//Select the current item.
selectionService.Select(selectable);
}
}
public bool Drop(IElementClipboardData data, bool insertAtBeginning)
{
if (CanDrop(data))
{
var elements = this.CreateElements(data);
var index = insertAtBeginning ? 0 : Elements.Count;
foreach (var element in elements)
{
Elements.Insert(index++, element);
}
MarkDirty();
SaveUndoState();
//Make sure that the new items are selected.
SelectionService.SelectNone();
foreach (var selectable in elements)
{
SelectionService.Select(selectable);
}
return(true);
}
return(false);
}
private static void SelectBetween(this ISelectionService selectionService,
ISelectable[] siblings,
ISelectable start,
ISelectable end)
{
//Select nothing
selectionService.SelectNone();
//Determine the start and stop
var startIndex = siblings.IndexOf(s => s == start);
var endIndex = siblings.IndexOf(s => s == end);
//If for some reason the siblings weren't found, bail
if (startIndex == null || endIndex == null)
{
return;
}
//Always start from the "first" sibling
var effectiveStart = Math.Min(startIndex.Value, endIndex.Value);
var effectiveEnd = Math.Max(startIndex.Value, endIndex.Value);
//Mark them all as selected.
for (int index = effectiveStart; index <= effectiveEnd; index++)
{
selectionService.Select(siblings[index]);
}
}
public static void RightClick(this ISelectionService selectionService, ISelectable selectable)
{
if (selectionService == null)
{
return;
}
if (selectable == null)
{
return;
}
if (!selectable.IsSelected)
{
selectionService.SelectNone();
//Select the current item.
selectionService.Select(selectable);
}
}
public static void DragSelected(this ISelectionService selectionService, DependencyObject dragSource)
{
if (selectionService == null)
{
throw new ArgumentNullException(nameof(selectionService));
}
var selected = selectionService.GetSelected();
//Make sure we have something to work with
if (selected.Length == 0)
{
return;
}
var elements = selected.OfType <IElement>()
.ToArray();
//Make sure that these are all elements
if (elements.Length != selected.Length)
{
return;
}
//Serialize for the clipboard
var momento = new ElementClipboardData(elements);
//Perform the operation
var result = DragDrop.DoDragDrop(dragSource, momento, DragDropEffects.Copy | DragDropEffects.Move);
if ((result & DragDropEffects.Move) == DragDropEffects.Move)
{
//Unselect these - they're going away.
selectionService.SelectNone();
//Remove the originals from their spots
foreach (var element in elements)
{
//Remove the element from where it came from
element.Parent?.RemoveElement(element);
}
}
}
/// <summary>
/// Selects <paramref name="selectable"/> and considers the Control/Shift buttons.
/// </summary>
/// <param name="selectionService"></param>
/// <param name="selectable"></param>
public static void SelectWithKeyboardModifiers(this ISelectionService selectionService, ISelectable selectable)
{
if (selectionService == null)
{
return;
}
if (selectable == null)
{
return;
}
switch (Keyboard.Modifiers)
{
case ModifierKeys.Control:
if (selectable.IsSelected)
{
selectionService.Unselect(selectable);
}
else
{
selectionService.Select(selectable);
}
break;
case ModifierKeys.Shift:
selectionService.ShiftSelect(selectable);
break;
case ModifierKeys.None:
selectionService.SelectNone();
selectionService.Select(selectable);
break;
}
}
