FestoDebugger/MainWindow.xaml

<Window x:Class="FestoDebugger.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:FestoDebugger"
        xmlns:UserControls="clr-namespace:FestoDebugger.UserControls"
        mc:Ignorable="d"
        Title="FestoDebuger" Height="450" Width="800">
    <ScrollViewer>
        <ItemsControl ItemsSource="{Binding SignalControls}">
            <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate>
                    <WrapPanel Orientation="Horizontal"/>
                </ItemsPanelTemplate>
            </ItemsControl.ItemsPanel>
            <ItemsControl.ItemTemplate>
                <DataTemplate>
                    <UserControls:FestoControl />
                </DataTemplate>
            </ItemsControl.ItemTemplate>
        </ItemsControl>
    </ScrollViewer>
</Window>