/// <summary>
/// Tries to move the dragged items from the <see cref="FloatWindow"/> into a
/// <see cref="DockTabPanel"/>.
/// </summary>
private void DragFloatWindowIntoDockTabPanel()
{
Debug.Assert(_targetDockTabPane == null);
Debug.Assert(_floatWindow != null);
var dockTabPane = GetTargetPane() as DockTabPane;
if (dockTabPane == null)
{
return; // No DockTabPane (view).
}
var dockTabPaneVM = dockTabPane.GetViewModel();
if (dockTabPaneVM == null)
{
return; // No IDockTabPane (view-model).
}
if (GetDockTabItemAtMouse(dockTabPane) == null)
{
return; // No DockTabItem hit.
}
if (!CanDock(dockTabPaneVM, DockPosition.Inside))
{
return; // Docking not allowed.
}
// Remove currently dragged FloatWindow.
var floatWindowVM = _floatWindow.GetViewModel();
foreach (var item in _draggedItems)
{
DockHelper.Remove(floatWindowVM, item);
}
_floatWindow = null;
Win32.ReleaseCapture(); // Exit Win32 move window loop.
// Add items into target DockTabPane.
_targetDockTabPane = dockTabPane;
foreach (var item in _draggedItems)
{
item.DockState = dockTabPaneVM.DockState;
dockTabPaneVM.Items.Add(item);
}
// Make sure the current item is selected in DockTabPane.
_dockStrategy.Activate(_activeItem);
// When the Win32 move window loop exits, the DockControl receives a LostMouseCapture
// event. --> Defer dragging of the DockTabItems.
_dockControl.Dispatcher.BeginInvoke(new Action(() =>
{
if (!_dockControl.IsMouseCaptured)
{
if (!_dockControl.CaptureMouse())
{
// Failed to capture the mouse.
EndDrag(false);
return;
}
_dockControl.LostMouseCapture += OnLostMouseCapture;
_dockControl.MouseMove += OnMouseMove;
_dockControl.MouseLeftButtonUp += OnMouseLeftButtonUp;
_dockControl.PreviewKeyDown += OnPreviewKeyDown;
_targetDockTabPane.PreviewKeyDown += OnPreviewKeyDown;
DragDockTabItems();
}
}));
HideBorderDockIndicators();
HidePaneIndicators();
_dockControl.UpdateFloatWindows();
_layoutChanged = true;
}
