Dynamic spacing between controls in the Toolbar in WPF - wpf

Question

I have a toolbar which contains several controls, say 10.
I want to place last three controls in the right corner of the tool bar with some space between these three controls and remaining controls.
When I resize the window, it should reduce the space, once there is no space it should be cliped to overflow drop down one by one.
Note: I need to use only one toolbar.

Answer 1

I did this once before
The items existed in a customized ScrollViewer so they could go off-screen, and the SizeChanged event of the ScrollViewer would check each item to see if it was off-screen or not. If it wasn't visibile, or was partially visible, then the item would get hidden and the data object would get added to a Menu. If the item was visible, it would remove it from the Menu if it existed there, and set it visible. The Menu was only visible if it had items.
This was done a while back when I was still new to WPF, so I'm sure the process could be improved on.
The helper class I used to determine item visibility is listed below
public static ControlVisibility IsObjectVisibleInContainer(FrameworkElement child, UIElement parent)
{
GeneralTransform childTransform = child.TransformToAncestor(parent);
Rect childSize = childTransform.TransformBounds(new Rect(new Point(0, 0), new Point(child.Width, child.Height)));
Rect result = Rect.Intersect(new Rect(new Point(0, 0), parent.RenderSize), childSize);
if (result == Rect.Empty)
{
return ControlVisibility.Hidden;
}
else if (result.Height == childSize.Height && result.Width == childSize.Width)
{
return ControlVisibility.Full;
}
else if (result.Height == childSize.Height)
{
return ControlVisibility.FullHeightPartialWidth;
}
else if (result.Width == childSize.Width)
{
return ControlVisibility.FullWidthPartialHeight;
}
else
{
return ControlVisibility.Partial;
}
}
public enum ControlVisibility
{
Hidden,
Partial,
Full,
FullHeightPartialWidth,
FullWidthPartialHeight
}
It could be used like this:
ControlVisibility itemVisibility =
MyHelpers.IsObjectVisibleInContainer(someItem, parentContainer);