TimetableDesigner/TimetableDesigner/Views/MainWindow.xaml

<rib:RibbonWindow x:Class="TimetableDesigner.Views.MainWindow"
                  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                  xmlns:vm="clr-namespace:TimetableDesigner.ViewModels"
                  xmlns:vmm="clr-namespace:TimetableDesigner.ViewModels.Models"
                  xmlns:p = "clr-namespace:TimetableDesigner.Properties"
                  xmlns:rib="urn:fluent-ribbon"
                  Height="450" 
                  Width="800">
    <rib:RibbonWindow.Title>
        <MultiBinding StringFormat="Timetable Designer {0} ({1})">
            <Binding Path="Version"/>
            <Binding Path="Project.Name" FallbackValue="{x:Static p:Resources.Global_NoProjectLoadedTitle}"/>
        </MultiBinding>
    </rib:RibbonWindow.Title>
    <rib:RibbonWindow.DataContext>
        <vm:MainViewModel/>
    </rib:RibbonWindow.DataContext>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="0.3*"/>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <rib:Ribbon Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="3">
            <rib:RibbonTabItem Header="{x:Static p:Resources.Main_Ribbon_File}">
                <rib:RibbonGroupBox Header="{x:Static p:Resources.Main_Ribbon_File_NewOpen}">
                    <rib:Button Header="{x:Static p:Resources.Main_Ribbon_File_NewOpen_New}" Icon="{StaticResource NewImage}" Command="{Binding NewProjectCommand}"/>
                    <rib:Button Header="{x:Static p:Resources.Main_Ribbon_File_NewOpen_Open}" Icon="{StaticResource OpenImage}" Command="{Binding OpenProjectCommand}"/>
                    <rib:DropDownButton Header="{x:Static p:Resources.Main_Ribbon_File_NewOpen_OpenRecent}" Icon="{StaticResource OpenRecentImage}"/>
                </rib:RibbonGroupBox>
                <rib:RibbonGroupBox Header="{x:Static p:Resources.Main_Ribbon_File_Save}" IsEnabled="{Binding Project, Converter={StaticResource IsNotNullToBooleanConverter}}">
                    <rib:Button Header="{x:Static p:Resources.Main_Ribbon_File_Save_Save}" Icon="{StaticResource SaveImage}"/>
                    <rib:Button Header="{x:Static p:Resources.Main_Ribbon_File_Save_SaveAs}" Icon="{StaticResource SaveAsImage}"/>
                </rib:RibbonGroupBox>
            </rib:RibbonTabItem>
            <rib:RibbonTabItem Header="{x:Static p:Resources.Main_Ribbon_Project}" IsEnabled="{Binding Project, Converter={StaticResource IsNotNullToBooleanConverter}}">
                <rib:RibbonGroupBox Header="{x:Static p:Resources.Main_Ribbon_Project_Settings}">
                    <rib:Button Header="{x:Static p:Resources.Main_Ribbon_Project_Settings_ProjectSettings}" 
                                Command="{Binding ProjectSettingsCommand}"
                                Icon="{StaticResource ProjectSettingsImage}"/>
                </rib:RibbonGroupBox>
                <rib:RibbonGroupBox Header="{x:Static p:Resources.Main_Ribbon_Project_New}">
                    <rib:Button Header="{x:Static p:Resources.Main_Ribbon_Project_New_NewClassroom}" Icon="{StaticResource ClassroomAddImage}" Command="{Binding NewClassroomCommand}"/>
                    <rib:Button Header="{x:Static p:Resources.Main_Ribbon_Project_New_NewTeacher}"/>
                    <rib:Button Header="{x:Static p:Resources.Main_Ribbon_Project_New_NewGroup}"/>
                    <rib:Button Header="{x:Static p:Resources.Main_Ribbon_Project_New_NewSubgroup}"/>
                    <rib:Button Header="{x:Static p:Resources.Main_Ribbon_Project_New_NewClass}"/>
                </rib:RibbonGroupBox>
            </rib:RibbonTabItem>
        </rib:Ribbon>
        <TreeView Grid.Row="1" Grid.Column="0" DataContext="{Binding Project}" Visibility="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=rib:RibbonWindow}, Path=DataContext.Project, Converter={StaticResource IsNullToVisibilityConverter}}">
            <TreeViewItem>
                <TreeViewItem.Header>
                    <StackPanel Orientation="Horizontal">
                        <Image Source="{StaticResource ProjectImage}" Width="18" Height="18"/>
                        <Label Content="{Binding Name}"/>
                    </StackPanel>
                </TreeViewItem.Header>
                <TreeViewItem.InputBindings>
                    <MouseBinding Gesture="LeftDoubleClick" 
                                  Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=rib:RibbonWindow}, Path=DataContext.ProjectSettingsCommand}"/>
                </TreeViewItem.InputBindings>
                <TreeViewItem ItemsSource="{Binding Classrooms}">
                    <TreeViewItem.Header>
                        <StackPanel Orientation="Horizontal">
                            <Image Source="{StaticResource ClassroomImage}" Width="18" Height="18"/>
                            <Label Content="{x:Static p:Resources.Main_Treeview_Classrooms}"/>
                        </StackPanel>
                    </TreeViewItem.Header>
                    <TreeViewItem.ItemTemplate>
                        <DataTemplate>
                            <TreeViewItem Header="{Binding Name}" Tag="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=rib:RibbonWindow}, Path=DataContext}">
                                <TreeViewItem.InputBindings>
                                    <MouseBinding Gesture="LeftDoubleClick"
                                                  Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=rib:RibbonWindow}, Path=DataContext.EditClassroomCommand}"
                                                  CommandParameter="{Binding}"/>
                                </TreeViewItem.InputBindings>
                                <TreeViewItem.ContextMenu>
                                    <ContextMenu>
                                        <MenuItem Header="{x:Static p:Resources.Main_Treeview_ContextMenu_EditTimetable}"/>
                                        <MenuItem Header="{x:Static p:Resources.Main_Treeview_Classrooms_ContextMenu_Edit}" 
                                                  Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ContextMenu}, Path=PlacementTarget.Tag.EditClassroomCommand}"
                                                  CommandParameter="{Binding}"/>
                                        <Separator/>
                                        <MenuItem Header="{x:Static p:Resources.Main_Treeview_ContextMenu_Remove}"
                                                  Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ContextMenu}, Path=PlacementTarget.Tag.RemoveClassroomCommand}"
                                                  CommandParameter="{Binding}"/>
                                    </ContextMenu>
                                </TreeViewItem.ContextMenu>
                            </TreeViewItem>
                        </DataTemplate>
                    </TreeViewItem.ItemTemplate>
                </TreeViewItem>
            </TreeViewItem>
        </TreeView>
        <GridSplitter Grid.Row="1" Grid.Column="1" HorizontalAlignment="Center" VerticalAlignment="Stretch" ShowsPreview="True" Width="2"/>
        <TabControl Grid.Row="1" Grid.Column="2" ItemsSource="{Binding Tabs}" SelectedItem="{Binding SelectedTab}">
            <TabControl.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <Image Source="{Binding TabImage}" 
                               Visibility="{Binding TabImage, Converter={StaticResource IsNullToVisibilityConverter}}" 
                               Width="15" 
                               Height="15"/>
                        <TextBlock Text="{Binding TabTitle}"/>
                        <Button BorderThickness="0" 
                                Background="Transparent" 
                                Margin="5,0,0,0" 
                                Visibility="{Binding IsTabClosable, Converter={StaticResource boolToVisibilityConverter}}" 
                                Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Window}, Path=DataContext.CloseTabCommand}" 
                                CommandParameter="{Binding RelativeSource={RelativeSource Mode=Self}, Path=DataContext}">
                            <Image Source="{StaticResource CloseImage}" 
                                   Width="15" 
                                   Height="15"/>
                        </Button>
                    </StackPanel>
                </DataTemplate>
            </TabControl.ItemTemplate>
            <TabControl.ContentTemplate>
                <DataTemplate>
                    <ContentControl Content="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Window}, Path=DataContext.SelectedTab, UpdateSourceTrigger = PropertyChanged, Converter={StaticResource ViewModelToViewConverter}}"/>
                </DataTemplate>
            </TabControl.ContentTemplate>
        </TabControl>
    </Grid>
</rib:RibbonWindow>