MainWindow.xaml

<Window x:Class="DYA.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:DYA"
        xmlns:ui="http://schemas.modernwpf.com/2019"
        ui:WindowHelper.UseModernWindowStyle="True"
        xmlns:converters="clr-namespace:DYA.Converters"
        mc:Ignorable="d"
        Title="DoYourAssignments" Height="450" Width="800" MinHeight="450" MinWidth="800">

    <Window.Resources>
        <converters:AssignmentConverter x:Key="AssignmentConverter"/>
        <!--<converters:VisibilityConverter x:Key="VisibilityConverter"/>

        <DataTemplate x:Key="ExpandDetails">
            <ToggleButton x:Name="ShowDetails"
                              IsChecked="{Binding RelativeSource={RelativeSource AncestorType=DataGridRow},
                                                  Path=DetailsVisibility,
                                                  Converter={StaticResource VisibilityConverter},
                                                  Mode=TwoWay}"/>
        </DataTemplate>-->
    </Window.Resources>
    
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>

        <!--View Panel-->
        <Grid Grid.Column="0">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="*"/>
            </Grid.RowDefinitions>

            <TextBlock Text="View Panel" Grid.Row="0"/>

            <DataGrid x:Name="Assignments" ItemsSource="{Binding}" AutoGenerateColumns="False" CanUserAddRows="False" Grid.Row="1">
                <DataGrid.Columns>
                    <DataGridTextColumn Header="ID"  Binding="{Binding ID}" IsReadOnly="True" Width="Auto"/>
                    <DataGridTextColumn Header="Name" Binding="{Binding Name}" IsReadOnly="True" Width="*"/>
                    <DataGridTextColumn Header="Current Points" Binding="{Binding CurrentPoints}" IsReadOnly="True" Width="*"/>
                    <DataGridTextColumn Header="Max Points" Binding="{Binding MaxPoints}" IsReadOnly="True" Width="*"/>
                    <DataGridTextColumn Header="Percentage (%)" Binding="{Binding PercentagePoints}" IsReadOnly="True" Width="*"/>
                </DataGrid.Columns>

                <DataGrid.RowDetailsTemplate>
                    <DataTemplate>
                        <Border BorderThickness="5">
                            <Grid>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="*"/>
                                    <ColumnDefinition Width="2*"/>
                                </Grid.ColumnDefinitions>

                                <StackPanel Grid.Column="0">
                                    <!--Info-->
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="Class: "/>

                                        <TextBlock Text="{Binding ClassName}"/>
                                    </StackPanel>

                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="Weeks: "/>

                                        <TextBlock Text="{Binding Weekcount}"/>
                                    </StackPanel>

                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="Next Due: "/>

                                        <TextBlock Text="{Binding NextDueTime}"/>
                                    </StackPanel>

                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="Goal reached?: "/>

                                        <TextBlock Text="{Binding GoalReached}"/>
                                    </StackPanel>
                                </StackPanel>

                                <!--Assignments-->
                                <DataGrid x:Name="ViewPanel"
                                            ItemsSource="{Binding Assignments}"
                                            CanUserAddRows="False"
                                            AutoGenerateColumns="False"
                                            Grid.Column="1">

                                    <DataGrid.Columns>
                                        <DataGridTextColumn Header="Week" Binding="{Binding Week}" IsReadOnly="True"/>
                                        <!--TODO: add DatePicker for editing-->
                                        <DataGridTextColumn Header="Due Time" Binding="{Binding DueTime}"/>
                                        <DataGridCheckBoxColumn Header="Submitted" Binding="{Binding Submitted}"/>
                                        <DataGridTextColumn Header="Reached Points" Binding="{Binding PointsReached}"/>
                                        <DataGridTextColumn Header="Max Points" Binding="{Binding PointsMax}"/>
                                        <DataGridTextColumn Header="Percentage (%)" Binding="{Binding PointsPercentage}" IsReadOnly="True"/>
                                    </DataGrid.Columns>
                                </DataGrid>
                            </Grid>
                        </Border>
                    </DataTemplate>
                </DataGrid.RowDetailsTemplate>
            </DataGrid>
        </Grid>

        <!--Saving/Settings Panel-->
        <StackPanel Grid.Row="1">

        </StackPanel>
    </Grid>
</Window>