private int GetRowCount(Size constraint)
{
var host = GetAncestorControl();
int rowCount = 1;
double currentOffset = 0;
var pinned = InternalChildren.OfType <UIElement>().Where(t => DockManager.GetIsPinned(t));
foreach (var item in pinned)
{
if (currentOffset > 0 && currentOffset + item.DesiredSize.Width > constraint.Width)
{
currentOffset = 0;
rowCount++;
}
currentOffset += item.DesiredSize.Width;
}
if (pinned.Any() && host?.PinOnSeparateRow == true)
{
rowCount++;
}
return(rowCount);
}
private IEnumerable <UIElement> GetItemsOnRow(Size constraint, int rowIndex)
{
var host = GetAncestorControl();
int rowNum = 0;
double currentOffset = 0;
var pinned = InternalChildren.OfType <UIElement>().Where(t => DockManager.GetIsPinned(t));
var notPinned = InternalChildren.OfType <UIElement>().Except(pinned);
foreach (var item in pinned)
{
if (currentOffset > 0 && currentOffset + item.DesiredSize.Width > constraint.Width)
{
currentOffset = 0;
rowNum++;
}
currentOffset += item.DesiredSize.Width;
if (rowNum == rowIndex)
{
yield return(item);
}
}
if (pinned.Any() && host?.PinOnSeparateRow == true)
{
rowNum++;
currentOffset = 0;
}
foreach (var item in notPinned)
{
if (currentOffset > 0 && currentOffset + item.DesiredSize.Width > constraint.Width)
{
if (host != null)
{
SetHasOverflowItems(host, true);
}
if (rowIndex == -1)
{
yield return(item);
continue;
}
else
{
yield break;
}
}
currentOffset += item.DesiredSize.Width;
if (rowNum == rowIndex)
{
yield return(item);
}
}
if (host != null)
{
SetHasOverflowItems(host, false);
}
}
private void PinTabCommandExecuted(object sender, ExecutedRoutedEventArgs e)
{
var container = (e.OriginalSource as FrameworkElement)?.FindVisualAncestor <TabItem>();
DockManager.SetIsPinned(container, !DockManager.GetIsPinned(container));
}
//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();
}