private void OnItemDragDelta(DockDragDeltaEventArgs e)
{
if (!IsMyItem(e.DockItem))
{
return;
}
if (FixedHeaderCount > 0 &&
_dockItemsControl.ItemsOrganizer.Sort(_dockItemsControl.DockItems())
.Take(FixedHeaderCount)
.Contains(e.DockItem))
{
return;
}
if (_tabHeaderDragStartInformation == null ||
!Equals(_tabHeaderDragStartInformation.Item, e.DockItem) ||
InterTabController == null)
{
return;
}
if (InterTabController.InterTabClient == null)
{
throw new InvalidOperationException("An InterTabClient must be provided on an InterTabController.");
}
MonitorBreach(e);
}
private void OnItemPreviewDragDelta(DockDragDeltaEventArgs e)
{
if (_dockItemsControl == null)
{
return;
}
var sourceOfDockItemsControl = e.DockItem.GetVisualAncestors().OfType <ItemsControl>().FirstOrDefault() as DockItemsControl;
if (sourceOfDockItemsControl == null || !Equals(sourceOfDockItemsControl, _dockItemsControl))
{
return;
}
if (!ShouldDragWindow(sourceOfDockItemsControl))
{
return;
}
if (MonitorReentry(e))
{
return;
}
var window = this.GetVisualAncestors().OfType <Window>().FirstOrDefault();
if (window == null)
{
return;
}
if (_interTabTransfer != null)
{
var cursorPositon = this.PointToClient(MouseDevice.Instance.Position);
if (_interTabTransfer.BreachOrientation == Orientation.Vertical)
{
var vector = cursorPositon - _interTabTransfer.DragStartWindowOffset;
window.Position = new Point(vector.X, vector.Y);
}
else
{
var offset = _interTabTransfer.OriginatorContainer.MouseAtDragStart * e.DockItem.TransformToVisual(window);
var borderVector = window.PointToScreen(new Point()).ToPerspex() - new Point(window.Position.X, window.Position.Y);
offset.Value.WithX(borderVector.X).WithY(borderVector.Y);
window.Position = new Point(cursorPositon.X - offset.Value.X, cursorPositon.Y - offset.Value.Y);
}
}
else
{
window.Position = window.Position + new Point(e.DragDeltaEventArgs.Vector.X, e.DragDeltaEventArgs.Vector.Y);
}
e.Handled = true;
}
private void MonitorBreach(DockDragDeltaEventArgs dockDragDeltaEventArgs)
{
var mousePositionOnHeaderItemsControl = MouseDevice.Instance.Position *
this.TransformToVisual(_dockItemsControl);
if (!mousePositionOnHeaderItemsControl.HasValue)
{
return;
}
Orientation?breachOrientation = null;
if (mousePositionOnHeaderItemsControl.Value.X < -InterTabController.HorizontalPopoutGrace ||
(mousePositionOnHeaderItemsControl.Value.X - _dockItemsControl.Width) > InterTabController.HorizontalPopoutGrace)
{
breachOrientation = Orientation.Horizontal;
}
else if (mousePositionOnHeaderItemsControl.Value.Y < -InterTabController.VerticalPopoutGrace ||
(mousePositionOnHeaderItemsControl.Value.Y - _dockItemsControl.Height) > InterTabController.VerticalPopoutGrace)
{
breachOrientation = Orientation.Vertical;
}
if (!breachOrientation.HasValue)
{
return;
}
var newTabHost = InterTabController.InterTabClient.GetNewHost(InterTabController.InterTabClient,
InterTabController.Partition, this);
if (newTabHost?.DockControl == null || newTabHost.Container == null)
{
throw new ApplicationException("New tab host was not correctly provided");
}
// var item = _dockItemsControl.GetVisualChildren().OfType<ItemsControl>().Where(x => x.ItemContainerGenerator.IndexFromContainer());
}
private bool MonitorReentry(DockDragDeltaEventArgs e)
{
var screenMousePosition = MouseDevice.Instance.Position;
var sourceDockControl = (DockControl)e.Source;
if (((IList)sourceDockControl.Items).Count > 1 && e.DockItem.LogicalIndex < sourceDockControl.FixedHeaderCount)
{
return(false);
}
var otherDockControls = LoadedInstances
.Where(
dc =>
dc != this && dc.InterTabController != null && InterTabController != null &&
Equals(dc.InterTabController.Partition, InterTabController.Partition))
.Select(dc =>
{
var topLeft = dc._dockItemsControl.PointToScreen(new Point());
var lastFixedItem = dc._dockItemsControl.DockItems()
.OrderBy(di => di.LogicalIndex)
.Take(dc._dockItemsControl.FixedItemCount)
.LastOrDefault();
if (lastFixedItem != null)
{
topLeft.WithX(lastFixedItem.X + lastFixedItem.Width);
}
var bottomRight = dc.PointToScreen(new Point(dc._dockItemsControl.Width,
dc._dockItemsControl.Height));
return(new { dc, topLeft, bottomRight });
});
// Perspex does not yet support iterating windows on top of this,
// Perspex does not allow access to Application from the current library setup.
Window target = null;
// force fail for now
if (target == null)
{
return(false);
}
var mousePositionOnItem = screenMousePosition * e.DockItem.TransformToVisual(e.DockItem);
var floatingItemSnapShots = e.DockItem.GetVisualChildren().OfType <Layout>()
.SelectMany(l => l.FloatingDockItems().Select(FloatingItemSnapShot.Take))
.ToList();
e.DockItem.IsDropTargetFound = true;
var item = RemoveItem(e.DockItem);
var interTabTransfer = new InterTabTransfer(item, e.DockItem, mousePositionOnItem.Value, floatingItemSnapShots);
e.DockItem.IsDragging = false;
//target.tc.RecieveDrag(interTabTransfer);
e.Cancel = true;
return(true);
}
private void ItemPreviewDragDelta(DockDragDeltaEventArgs e)
{
}
