StructureHelper/Windows/PrimitivePropertiesWindow/PrimitivePropertiesView.xaml

<Window x:Class="StructureHelper.Windows.PrimitiveProperiesWindow.PrimitiveProperties"
        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:StructureHelper.Windows.PrimitiveProperiesWindow"
        xmlns:vm="clr-namespace:StructureHelper.Windows.ViewModels.PrimitiveProperties"
        d:DataContext="{d:DesignInstance vm:PrimitivePropertiesViewModel}"
        mc:Ignorable="d"
        Title="PrimitiveProperties" Height="450" Width="300" ResizeMode="NoResize" WindowStartupLocation="CenterScreen">
    <Window.Resources>
        <DataTemplate x:Key="RectangleProperties">
            <Expander Header="Rectangle" IsExpanded="True">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="22"/>
                        <RowDefinition Height="22"/>
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="100"/>
                        <ColumnDefinition/>
                    </Grid.ColumnDefinitions>
                    <TextBlock Grid.Row="0" Text="Width"/>
                    <TextBlock Grid.Row="1" Text="Height"/>
                    <TextBox Grid.Row="0" Grid.Column="1" Margin="1" Text="{Binding Width, Converter={StaticResource LengthConverter}, ValidatesOnExceptions=True}"/>
                    <TextBox Grid.Row="1" Grid.Column="1" Margin="1" Text="{Binding Height, Converter={StaticResource LengthConverter}, ValidatesOnExceptions=True}"/>
                </Grid>
            </Expander>
        </DataTemplate>
        <DataTemplate x:Key="PointProperties">
            <Expander Header="Point" IsExpanded="True">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="22"/>
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="100"/>
                        <ColumnDefinition/>
                    </Grid.ColumnDefinitions>
                    <TextBlock Grid.Row="0" Text="Area"/>
                    <TextBox Grid.Row="0" Grid.Column="1" Margin="1" Text="{Binding Area, Converter={StaticResource AreaConverter}, ValidatesOnExceptions=True}"/>
                </Grid>
            </Expander>
        </DataTemplate>
        <DataTemplate x:Key="TriangulationProperties">
            <Expander Header="Triangulation" IsExpanded="False">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="22"/>
                        <RowDefinition Height="22"/>
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="150"/>
                        <ColumnDefinition/>
                    </Grid.ColumnDefinitions>
                    <TextBlock Grid.Row="0" Text="Minimum element division"/>
                    <TextBlock Grid.Row="1" Text="Maximum element size"/>
                    <TextBox Grid.Row="0" Grid.Column="1" Margin="1" Text="{Binding MinElementDivision, ValidatesOnExceptions=True}"/>
                    <TextBox Grid.Row="1" Grid.Column="1" Margin="1" Text="{Binding MaxElementSize, Converter={StaticResource LengthConverter}, ValidatesOnExceptions=True}"/>
                </Grid>
            </Expander>
        </DataTemplate>
    </Window.Resources>
    <ScrollViewer>
        <StackPanel x:Name="StpProperties">
            <Expander Header="Common properties" IsExpanded="True">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="22"/>
                        <RowDefinition Height="22"/>
                        <RowDefinition Height="22"/>
                        <RowDefinition Height="22"/>
                        <RowDefinition Height="22"/>
                        <RowDefinition Height="22"/>
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="100"/>
                        <ColumnDefinition/>
                    </Grid.ColumnDefinitions>
                    <TextBlock Grid.Row="0" Text="Name"/>
                    <TextBlock Grid.Row="1" Text="Name of material"/>
                    <TextBlock Grid.Row="2" Text="Center X"/>
                    <TextBlock Grid.Row="3" Text="Center Y"/>
                    <TextBlock Grid.Row="4" Text="Material color"/>
                    <TextBlock Grid.Row="5" Text="Z-index (integer)"/>
                    <TextBox Grid.Row="0" Grid.Column="1" Margin="1" Text="{Binding Name}"/>
                    <StackPanel Grid.Row="1" Grid.Column="1" Orientation="Horizontal" HorizontalAlignment="Left">
                        <ComboBox Width="120" ItemsSource="{Binding HeadMaterials}" SelectedItem="{Binding PrimitiveMaterial}">
                            <ComboBox.ItemTemplate>
                                <DataTemplate>
                                    <Grid>
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition Width="20"/>
                                            <ColumnDefinition/>
                                        </Grid.ColumnDefinitions>
                                        <Rectangle Grid.Column="0" Margin="3">
                                            <Rectangle.Fill>
                                                <SolidColorBrush Color="{Binding Color}"/>
                                            </Rectangle.Fill>
                                        </Rectangle>
                                        <TextBlock Grid.Column="1" Text="{Binding Name}"/>
                                    </Grid>
                                </DataTemplate>
                            </ComboBox.ItemTemplate>
                        </ComboBox>
                        <Button Width="50" Content="..." Command="{Binding EditMaterialCommand}">
                        </Button>
                    </StackPanel>
                    <TextBox Grid.Row="2" Grid.Column="1" Margin="1" Text="{Binding CenterX, Converter={StaticResource LengthConverter}, ValidatesOnExceptions=True}"/>
                    <TextBox Grid.Row="3" Grid.Column="1" Margin="1" Text="{Binding CenterY, Converter={StaticResource LengthConverter}, ValidatesOnExceptions=True}"/>
                    <TextBox Grid.Row="5" Grid.Column="1" Margin="1" Text="{Binding ZIndex}"/>
                    <StackPanel Grid.Row="4" Grid.Column="1" Orientation="Horizontal" HorizontalAlignment="Right">
                        <CheckBox IsChecked="{Binding SetMaterialColor}" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,0,20,0"/>
                        <Rectangle Width="50" Margin="5,0,10,0">
                            <Rectangle.Fill>
                                <SolidColorBrush Color="{Binding Color}"/>
                            </Rectangle.Fill>
                        </Rectangle>
                        <Button Width="50" Content="..." Command="{Binding EditColorCommand}"/>
                    </StackPanel>
                </Grid>
            </Expander>
            <Expander Header="Prestrain" IsExpanded="False">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="22"/>
                        <RowDefinition Height="22"/>
                        <RowDefinition Height="22"/>
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="100"/>
                        <ColumnDefinition/>
                    </Grid.ColumnDefinitions>
                    <TextBlock Grid.Row="0" Text="k_x"/>
                    <TextBlock Grid.Row="1" Text="k_y"/>
                    <TextBlock Grid.Row="2" Text="epsilon_z"/>
                    <TextBox Grid.Row="0" Grid.Column="1" Margin="1" Text="{Binding PrestrainKx, Converter={StaticResource Curvature}, ValidatesOnDataErrors=True}"/>
                    <TextBox Grid.Row="1" Grid.Column="1" Margin="1" Text="{Binding PrestrainKy, Converter={StaticResource Curvature}, ValidatesOnDataErrors=True}"/>
                    <TextBox Grid.Row="2" Grid.Column="1" Margin="1" Text="{Binding PrestrainEpsZ, Converter={StaticResource PlainDouble}, ValidatesOnDataErrors=True}"/>
                </Grid>
            </Expander>
        </StackPanel>
    </ScrollViewer>
</Window>