回答編集履歴

  `<Grid MinWidth="1320" MinHeight="390">`が原因です。

  1320より小さくならないので`Grid`内にいるボタン類が`Window`外にはみ出ます。

 

  試行錯誤されてxamlに混乱が見られたので、整理させていただきました。

  余計なお世話だったらすいません^^;

 

  <Window

  x:Class="WpfApp2.MainWindow"

  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

  xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"

  Title="MainWindow"

  Width="1320"

  Height="390"

  AllowsTransparency="True"

  Background="{x:Null}"

  Foreground="DarkGray"

  ResizeMode="CanResizeWithGrip"

  WindowStartupLocation="CenterScreen"

  WindowStyle="None">

  <Window.Resources>

  <Style x:Key="WindowButtonStyle" TargetType="Button">

  <Setter Property="Width" Value="30" />

  <Setter Property="Height" Value="30" />

  <Setter Property="Margin" Value="0,0,0,0" />

  <Setter Property="Background" Value="Transparent" />

  <Setter Property="BorderBrush" Value="Transparent" />

  <Setter Property="BorderThickness" Value="0" />

  </Style>

  </Window.Resources>

  <Border

  Background="Green"

  BorderThickness="1.5"

  CornerRadius="10">

  <Grid>

  <Grid.RowDefinitions>

  <RowDefinition Height="Auto" />

  <RowDefinition />

  </Grid.RowDefinitions>

  <StackPanel

  HorizontalAlignment="Right"

  VerticalAlignment="Top"

  Orientation="Horizontal"

  ZIndex="4">

  <Button

  Content="〇"

  Foreground="DarkGray"

  Style="{StaticResource WindowButtonStyle}" />

  <Button

  Content="-"

  Foreground="DarkGray"

  Style="{StaticResource WindowButtonStyle}" />

  <Button

  Padding="0"

  Content="△"

  Cursor="Hand"

  Style="{StaticResource WindowButtonStyle}" />

  <Button

  Padding="0"

  Content="×"

  Cursor="Hand"

  Style="{StaticResource WindowButtonStyle}" />

  </StackPanel>

  <Border

  Margin="0,2.5"

  VerticalAlignment="Top"

  Background="Blue"

  BorderThickness="1.5"

  CornerRadius="10">

  <StackPanel Orientation="Horizontal">

  <Image

  Width="65"

  Height="65"

  Margin="8,0,0,0" />

  <ListView

  x:Name="ListViewMenu"

  Height="60"

  VerticalAlignment="Top"

  Background="{x:Null}"

  Cursor="Hand"

  FontFamily="Arial"

  FontSize="14"

  FontWeight="Bold"

  Foreground="#FFBBB6B6"

  ScrollViewer.VerticalScrollBarVisibility="Disabled">

  <ListView.ItemContainerStyle>

  <Style TargetType="ListViewItem">

  <Setter Property="Template">

  <Setter.Value>

  <ControlTemplate TargetType="ListViewItem">

  <Border Background="Transparent">

  <ContentPresenter

  Margin="20,0"

  HorizontalAlignment="Center"

  VerticalAlignment="Center" />

  </Border>

  </ControlTemplate>

  </Setter.Value>

  </Setter>

  </Style>

  </ListView.ItemContainerStyle>

  <ListBox.ItemsPanel>

  <ItemsPanelTemplate>

  <StackPanel Orientation="Horizontal" />

  </ItemsPanelTemplate>

  </ListBox.ItemsPanel>

  <ListViewItem Name="Dash" Uid="0">

  <TextBlock Text="aaaa" />

  </ListViewItem>

  <ListViewItem Uid="1">

  <TextBlock Text="bbbb" />

  </ListViewItem>

  <ListViewItem Uid="2">

  <TextBlock Text="cccc" />

  </ListViewItem>

  <ListViewItem Uid="4">

  <TextBlock Text="dddd" />

  </ListViewItem>

  <ListViewItem Uid="6">

  <TextBlock Text="fffff" />

  </ListViewItem>

  <ListViewItem Uid="5">

  <TextBlock Text="eeeee" />

  </ListViewItem>

  <ListViewItem Uid="7">

  <TextBlock Text="gggg" />

  </ListViewItem>

  </ListView>

  </StackPanel>

  </Border>

  <Frame

  x:Name="Frame"

  Grid.Row="1"

  Foreground="{x:Null}"

  NavigationUIVisibility="Hidden" />

  </Grid>

  </Border>

  </Window>

  ```