private void InsertByDockPosition(LayoutContext layoutContext, System.Windows.Controls.Dock?defaultPosition = null)
{
Debug.Assert(!IsIdle);
if (LayoutContexts.Count > 1)
{
// See if the visual has a DockPosition property. If so, automatically
// position the child.
LayoutContext reference = (LayoutContexts[0] == layoutContext ? LayoutContexts[1] : LayoutContexts[0]);
System.Windows.Controls.Dock?dockPosition = GetDockPosition(layoutContext.DockableCollection);
switch (dockPosition ?? defaultPosition)
{
case null:
break;
case System.Windows.Controls.Dock.Bottom:
layoutContext.DockableCollection.HorizontalContentAlignment = HorizontalAlignment.Stretch;
layoutContext.InsertBottom(reference);
break;
case System.Windows.Controls.Dock.Left:
layoutContext.DockableCollection.VerticalContentAlignment = VerticalAlignment.Stretch;
layoutContext.InsertLeft(reference);
break;
case System.Windows.Controls.Dock.Right:
layoutContext.DockableCollection.VerticalContentAlignment = VerticalAlignment.Stretch;
layoutContext.InsertRight(reference);
break;
case System.Windows.Controls.Dock.Top:
layoutContext.DockableCollection.HorizontalContentAlignment = HorizontalAlignment.Stretch;
layoutContext.InsertTop(reference);
break;
default:
throw new ArgumentException("Invalid value: " + (dockPosition.HasValue ? dockPosition.Value.ToString() : "<null>"), "DockPosition");
}
}
}
internal void InsertByLocation(DockableCollection visual, Rect bounds, System.Windows.Controls.Dock defaultPosition)
{
using (new Activity(this))
{
LayoutContext layoutContext = GetLayoutContext(visual);
LayoutContext reference = (LayoutContexts[0] == layoutContext ? LayoutContexts[1] : LayoutContexts[0]);
// If the dock resized (smaller) and the bounds are outside the dock, position the visual at the right or bottom edge
if (bounds.Left >= ActualWidth)
{
layoutContext.InsertRight(reference);
}
else if (bounds.Top >= ActualHeight)
{
layoutContext.InsertBottom(reference);
}
else
{
// Find the visual where the new visual's midpoint was
double centerX = (bounds.Left + bounds.Right) / 2;
double centerY = (bounds.Top + bounds.Bottom) / 2;
LayoutContext midpointReference = FindMidPoint(centerX, centerY);
if (midpointReference == null)
{
// The midpoint is outside the dock
InsertByDockPosition(layoutContext, defaultPosition);
}
else
{
// Position the visual relative to this reference
double referenceX = (midpointReference.Left.Value + midpointReference.Right.Value) / 2;
double referenceY = (midpointReference.Top.Value + midpointReference.Bottom.Value) / 2;
if (Math.Abs(centerX - referenceX) < MinimumChildSize.Width / 2)
{
if (centerY < referenceY)
{
midpointReference.InsertAbove(layoutContext);
}
else
{
midpointReference.InsertBelow(layoutContext);
}
}
else if (Math.Abs(centerY - referenceY) < MinimumChildSize.Height / 2)
{
if (centerX < referenceX)
{
midpointReference.InsertToLeftOf(layoutContext);
}
else
{
midpointReference.InsertToRightOf(layoutContext);
}
}
else
{
midpointReference.InsertBelow(layoutContext);
}
}
}
}
}
