private void ShowPaneIndicators(FrameworkElement targetElement)
{
Debug.Assert(targetElement != null);
if (_paneDockIndicators != null && _paneDockIndicators.Target == targetElement)
{
return;
}
HidePaneIndicators();
// The visible drop target buttons are determined by the DockStrategy.
// For DockAnchorPanes only the inside button is visible.
bool isAnchorPane = targetElement is DockAnchorPane;
_paneDockIndicators = new PaneIndicators(targetElement)
{
AllowDockLeft = !isAnchorPane && CanDock(DockHelper.GetViewModel <IDockPane>(targetElement), DockPosition.Left),
AllowDockTop = !isAnchorPane && CanDock(DockHelper.GetViewModel <IDockPane>(targetElement), DockPosition.Top),
AllowDockRight = !isAnchorPane && CanDock(DockHelper.GetViewModel <IDockPane>(targetElement), DockPosition.Right),
AllowDockBottom = !isAnchorPane && CanDock(DockHelper.GetViewModel <IDockPane>(targetElement), DockPosition.Bottom),
AllowDockInside = CanDock(DockHelper.GetViewModel <IDockPane>(targetElement), DockPosition.Inside),
};
_paneDockIndicators.Show();
}
private void Commit()
{
if (_layoutChanged)
{
if (IsDraggingDockTabItems)
{
// Dragging ended in DockTabPanel.
RestoreFloatWindowPosition();
}
else if (_floatWindow != null)
{
// Dragging ended outside of a DockTabPanel. Check the dock indicators to find the
// desired target position.
IDockPane target = null;
DockPosition position = DockPosition.None;
if (HasResult(_borderDockIndicators))
{
target = _dockStrategy.DockControl.RootPane;
position = _borderDockIndicators.Result;
}
else if (HasResult(_paneDockIndicators))
{
target = DockHelper.GetViewModel <IDockPane>(_paneDockIndicators.Target);
position = _paneDockIndicators.Result;
}
if (position != DockPosition.None && target != null)
{
// User has dropped FloatWindow on a DockIndicator.
// --> Dock content.
var floatWindowVM = _floatWindow.GetViewModel();
foreach (var item in _draggedItems)
{
DockHelper.Remove(floatWindowVM, item);
item.DockState = DockState.Hide;
}
var dockTabPane = _dockStrategy.CreateDockTabPane(_draggedItems[0], DockState.Hide);
for (int i = 1; i < _draggedItems.Count; i++)
{
dockTabPane.Items.Add(_draggedItems[i]);
}
_dockStrategy.Dock(dockTabPane, target, position);
RestoreFloatWindowPosition();
}
else
{
// The final state is DockState.Float.
if (!_canFloat && _originalDockState != DockState.Float)
{
// DockState.Float is not allowed.
Rollback();
return;
}
}
}
}
// Keep the items at their new position.
// --> Remove the item proxies.
var dockState = _draggedItems[0].DockState;
RemoveItemProxies(dockState);
if (_layoutChanged && dockState == DockState.Dock)
{
// The position within the DockControl may have changed. The assignment to the
// auto-hide bar is no longer valid.
// --> Also remove item proxies from auto-hide bars.
RemoveItemProxies(DockState.AutoHide);
}
// Restore the original dock state of the dragged items.
RestoreItemsFromProxies();
}
