Сложность с горизонтальными полосами прокрутки на сетке и текстовом поле.

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Привет,

Я создал окно с большим многострочным текстовым полем, с рядами кнопок сверху
и еще ниже.

То, что я пытаюсь сделать, - это ввести полосы прокрутки в текстовое поле, когда окно слишком узкое
для текста в текстовом поле затем введите полосы прокрутки для самого элемента управления grid, когда
окно сужено до такой степени, что оно слишком узко, чтобы показать панель, на которой находятся кнопки
находятся внутри.

Вертикальный аспект, кажется, работает достаточно хорошо. Это горизонтальный аспект, который у меня есть
трудности с этим.

Я прокомментировал вещи, которые я пробовал до сих пор.

То, что у меня есть сейчас, работает лучше всего из того, что я пробовал.

Любая помощь будет весьма признательна.

Что я уже пробовал:

<Window x:Class="Wpf_size_01.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:Wpf_size_01"

        mc:Ignorable="d"  Top="24" Left="48"

        xmlns:tools="clr-namespace:MyApp.Tools"

        Height="{Binding Source={x:Static SystemParameters.PrimaryScreenHeight}, Converter={tools:RatioConverter}, ConverterParameter='0.9' }" 

        Width="{Binding Source={x:Static SystemParameters.PrimaryScreenWidth}, Converter={tools:RatioConverter}, ConverterParameter='0.9' }" 

        Title="MainWindow">

    <!--  This one gets scroll on the grid.  -->
    <!--<ScrollViewer HorizontalAlignment="Stretch" VerticalAlignment="Stretch" removed="DarkRed"
                            HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"
                            Width="Auto" Height="Auto" Margin="4,4,8,48" >
        <Grid>-->

    <!--  This one gets scroll on the textbox. (This is better, but not quite there.) -->
    <ScrollViewer removed="DarkRed"

                  Width="Auto" Height="Auto" Margin="4,4,8,48" >
        <Grid ScrollViewer.CanContentScroll="True" ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Auto">
                <Grid.RowDefinitions>
            <RowDefinition  Height="*"/>
            <RowDefinition Height="680"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
                <!--<ColumnDefinition Width="1680"></ColumnDefinition>-->
                <ColumnDefinition Width="1*"></ColumnDefinition>
            </Grid.ColumnDefinitions>

            <!--<StackPanel HorizontalAlignment="Stretch" Height="Auto" Margin="24,48,88,148" VerticalAlignment="Stretch" Width="Auto" Grid.Row="0" Orientation="Vertical">-->
            <StackPanel FlowDirection="LeftToRight" Orientation="Horizontal" Grid.Row="0" Grid.Column="0" Height="44"

                        HorizontalAlignment="Center" removed="Aquamarine" VerticalAlignment="Center" Width="832" Margin="24,8,38,28">
                <Button x:Name="button1" Width="88" Height="34" Content="Button a"  Margin="212,4,64,4" HorizontalAlignment="Center"/>
                <Button x:Name="button2" Width="88" Height="34" Content="Button b"  Margin="4,4,64,4" HorizontalAlignment="Center"/>
                <Button x:Name="button3" Width="88" Height="34" Content="Button c"  Margin="4,4,4,4"  HorizontalAlignment="Center" />
            </StackPanel>
            <!--<DockPanel HorizontalAlignment="Stretch" Height="Auto" Margin="4,8,16,20" VerticalAlignment="Stretch" removed="DarkGray" Width="Auto"
                            Grid.Row="1" Grid.Column="0">-->
            <!--<ScrollViewer HorizontalAlignment="Stretch" Height="Auto" Margin="4,8,16,20" VerticalAlignment="Stretch" removed="DarkGreen" Width="Auto"
                            HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" Grid.Row="1" Grid.Column="0">-->
                <!--<TextBox x:Name="TextBox_01" Height="Auto" TextWrapping="NoWrap" Margin="4,0,4,0" ScrollViewer.HorizontalScrollBarVisibility="Auto"
                         ScrollViewer.VerticalScrollBarVisibility="Auto"  ScrollViewer.CanContentScroll="True"
                         Text="TextBox" Width="Auto" FontSize="20" FontFamily="New Courier"
                         Foreground="White" removed="DarkBlue" AcceptsReturn="True" Grid.Row="1" Grid.Column="0"/>-->
                <TextBox x:Name="TextBox_01" Height="Auto" TextWrapping="NoWrap" Margin="4,0,4,0" Focusable="True"

                         HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" TextAlignment="Left"

                         Text="TextBox with a very LLLLLLLLLLLLLLLLLLLLLLLLOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOONNNNNNNNNNNNNNNNNNNNNNNNNNNGGGGGGGGGGGGGGGGGGGGGG line.   "

                         Width="Auto" FontSize="20" FontFamily="New Courier" MinWidth="434"

                         Foreground="White" removed="DarkBlue" AcceptsReturn="True" Grid.Row="1" Grid.Column="0"/>
            <!--</ScrollViewer>-->
            <!--</DockPanel>-->
            <!--<DockPanel FlowDirection="LeftToRight" Grid.Row="2" Grid.Column="0" Height="44"
                HorizontalAlignment="Center" removed="Aquamarine" VerticalAlignment="Center" Width="832" Margin="24,8,38,28">-->
            <StackPanel FlowDirection="LeftToRight" Orientation="Horizontal" Grid.Row="2" Grid.Column="0" Height="44"

                        HorizontalAlignment="Center" removed="Aquamarine" VerticalAlignment="Center" Width="832" Margin="24,8,38,28">
                <Button x:Name="button4" Width="88" Height="34" Content="Button d"  Margin="212,4,64,4" HorizontalAlignment="Center"/>
                <Button x:Name="button5" Width="88" Height="34" Content="Button e"  Margin="4,4,64,4" HorizontalAlignment="Center"/>
                <Button x:Name="button6" Width="88" Height="34" Content="Button f"  Margin="4,4,4,4"  HorizontalAlignment="Center" />
            </StackPanel>
            <!--</DockPanel>-->
            <!--</StackPanel>-->
    </Grid>
    </ScrollViewer>

</Window>

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Markup;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Wpf_size_01 {
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow:Window {
        public MainWindow() {
        InitializeComponent();
        }
    }
}

namespace MyApp.Tools
{

    [ValueConversion(typeof(string), typeof(string))]
    public class RatioConverter : MarkupExtension, IValueConverter
    {
      private static RatioConverter _instance;

      public RatioConverter() { }

      public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
      { // do not let the culture default to local to prevent variable outcome re decimal syntax
        double size = System.Convert.ToDouble(value) * System.Convert.ToDouble(parameter,CultureInfo.InvariantCulture);
        return size.ToString( "G0", CultureInfo.InvariantCulture );
      }

      public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
      { // read only converter...
        throw new NotImplementedException();
      }

      public override object ProvideValue(IServiceProvider serviceProvider)
      {
        return _instance ?? (_instance = new RatioConverter());
      }

    }
}

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