private void CaptionPanel_MouseMove(object sender, MouseEventArgs e)
{
if (!titleBar.IsMouseCaptured)
{
return;
}
var pos = e.GetPosition(titleBar);
var dist = Math.Sqrt(Math.Pow(pos.X - dragStart.X, 2) + Math.Pow(pos.Y - dragStart.Y, 2));
if (dist > floatThreshold)
{
var args = new FloatEventArgs(this, null, e);
titleBar.ReleaseMouseCapture();
FloatAllCommand?.TryExecute(args);
}
}
//internal command - OriginalSource is TabWellItem, Parameter is MouseEventArgs
private void TabMouseMoveCommandExecuted(object sender, ExecutedRoutedEventArgs e)
{
var tab = (TabWellItem)e.OriginalSource;
var mouseArgs = (MouseEventArgs)e.Parameter;
if (!tab.IsMouseCaptured || !tab.IsLoaded)
{
return;
}
var item = ItemContainerGenerator.ItemFromContainer(tab);
var index = Items.IndexOf(item);
var pos = mouseArgs.GetPosition(tab);
var offset = mouseArgs.GetPosition(this);
var floatBounds = new Rect(
pos.X - offset.X,
-floatThreshold,
this.ActualWidth,
tab.ActualHeight + floatThreshold * 2
);
if (!floatBounds.Contains(pos))
{
var args = new FloatEventArgs(this, tab, mouseArgs);
tab.ReleaseMouseCapture();
DockManager.SetIsPinned(tab, false);
FloatTabCommand?.TryExecute(args);
return;
}
if (pos.X > 0 && pos.X < tab.ActualWidth)
{
swapThreshold = 0;
}
var isPinned = DockManager.GetIsPinned(tab);
var grouped = Items.OfType <object>()
.Select(i => ItemContainerGenerator.ContainerFromItem(i))
.Where(c => DockManager.GetIsPinned(c) == isPinned);
var collection = ItemsSource as IList ?? Items as IList;
if (pos.X < -swapThreshold && index > 0)
{
var prevTab = grouped.TakeWhile(c => c != tab).LastOrDefault() as FrameworkElement;
if (prevTab != null)
{
swapThreshold = (int)Math.Ceiling(Math.Max(0, prevTab.ActualWidth - tab.ActualWidth));
floatThreshold = maxFloatThreshold;
collection.Remove(item);
collection.Insert(index - 1, item);
tab = (TabWellItem)ItemContainerGenerator.ContainerFromIndex(index - 1);
}
}
else if (pos.X > tab.ActualWidth + swapThreshold && index < Items.Count - 1)
{
var nextTab = grouped.SkipWhile(c => c != tab).Skip(1).FirstOrDefault() as FrameworkElement;
if (nextTab != null)
{
swapThreshold = (int)Math.Ceiling(Math.Max(0, nextTab.ActualWidth - tab.ActualWidth));
floatThreshold = maxFloatThreshold;
collection.Remove(item);
collection.Insert(index + 1, item);
tab = (TabWellItem)ItemContainerGenerator.ContainerFromIndex(index + 1);
}
}
SelectedItem = item;
tab.CaptureMouse();
}