How to Read some of the properties of the ItemSource when Laying out the Children?

Question

Assume that I have the ItemSource bound and i am getting the data. Now what I want is this. The ItemSource will contain Data that tells where each button should be. For Example: The first Button could be at Left:200,Top:0, the Second could be Left:50 Top:20.

</ItemsControl.Resources>
            <ItemsControl.ItemsPanel>
            <ItemsPanelTemplate>
                <Controls:MatrixCanvas />
            </ItemsPanelTemplate>
        </ItemsControl.ItemsPanel>
        <ItemsControl.ItemTemplate>
            <DataTemplate>
                <item:CustomButton
                    Height="{Binding btnSize}" 
                    Width="{Binding btnSize}" 
                    Style="{Binding bbColor,Converter={StaticResource ButtonStyleConverter}}"
                    />
            </DataTemplate>
        </ItemsControl.ItemTemplate>
    </ItemsControl>



protected override Size ArrangeOverride(Size finalSize)
        {
            foreach (var child in Children)
            {
                //The child
            }
            return base.ArrangeOverride(finalSize);
        }

The Child however is not giving me access to the Item that I want. Is their a good solution for this? Am I going about this the wrong way? The reason I am doing it like this is because their can be buttons added dynamically, removed, some buttons will need to move around etc..

Answer 1

Found a way to do it.

var presenter = (ContentPresenter)child; var dataContext = presenter.DataContext as MyClass;