WindowButtonCommands.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:converters="clr-namespace:MahApps.Metro.Converters"
                    xmlns:mah="clr-namespace:MahApps.Metro.Controls">

    <!--  WindowButtonCommands control templates  -->

    <ControlTemplate x:Key="MahApps.Templates.WindowButtonCommands" TargetType="{x:Type mah:WindowButtonCommands}">
        <StackPanel Orientation="Horizontal">
            <Button x:Name="PART_Min"
                    AutomationProperties.AutomationId="Minimize"
                    AutomationProperties.Name="Minimize"
                    Command="{x:Static SystemCommands.MinimizeWindowCommand}"
                    Focusable="False"
                    IsEnabled="{Binding IsMinButtonEnabled, RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}}"
                    ToolTip="{Binding Minimize, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}">
                <Button.Visibility>
                    <MultiBinding Converter="{x:Static converters:ResizeModeMinMaxButtonVisibilityConverter.Instance}" ConverterParameter="MIN">
                        <Binding Mode="OneWay"
                                 Path="ShowMinButton"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                        <Binding Mode="OneWay"
                                 Path="UseNoneWindowStyle"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                        <Binding Mode="OneWay"
                                 Path="ResizeMode"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                    </MultiBinding>
                </Button.Visibility>
                <Path Data="F1M0,6L0,9 9,9 9,6 0,6z"
                      Fill="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}"
                      SnapsToDevicePixels="True" />
            </Button>
            <Button x:Name="PART_Max"
                    AutomationProperties.AutomationId="MaximizeRestore"
                    AutomationProperties.Name="Maximize"
                    Command="{x:Static SystemCommands.MaximizeWindowCommand}"
                    Focusable="False"
                    IsEnabled="{Binding IsMaxRestoreButtonEnabled, RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}}"
                    ToolTip="{Binding Maximize, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}">
                <Button.Visibility>
                    <MultiBinding Converter="{x:Static converters:ResizeModeMinMaxButtonVisibilityConverter.Instance}" ConverterParameter="MAX">
                        <Binding Mode="OneWay"
                                 Path="ShowMaxRestoreButton"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                        <Binding Mode="OneWay"
                                 Path="UseNoneWindowStyle"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                        <Binding Mode="OneWay"
                                 Path="ResizeMode"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                    </MultiBinding>
                </Button.Visibility>
                <!--  normal state  -->
                <Path x:Name="PART_MaxPath"
                      Width="10"
                      Height="10"
                      Data="F1M0,0L0,9 9,9 9,0 0,0 0,3 8,3 8,8 1,8 1,3z"
                      Fill="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}"
                      SnapsToDevicePixels="True" />
            </Button>
            <Button x:Name="PART_Close"
                    AutomationProperties.AutomationId="Close"
                    AutomationProperties.Name="Close"
                    Command="{x:Static SystemCommands.CloseWindowCommand}"
                    Focusable="False"
                    IsEnabled="{Binding RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}, Path=IsCloseButtonEnabled, Mode=OneWay}"
                    RenderOptions.EdgeMode="Aliased"
                    ToolTip="{Binding Close, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}">
                <Button.Visibility>
                    <MultiBinding Converter="{x:Static converters:ResizeModeMinMaxButtonVisibilityConverter.Instance}" ConverterParameter="CLOSE">
                        <Binding Mode="OneWay"
                                 Path="ShowCloseButton"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                        <Binding Mode="OneWay"
                                 Path="UseNoneWindowStyle"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                    </MultiBinding>
                </Button.Visibility>
                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                    <Line SnapsToDevicePixels="True"
                          Stroke="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}"
                          StrokeThickness="2.5"
                          X1="1"
                          X2="9"
                          Y1="1"
                          Y2="9" />
                    <Line SnapsToDevicePixels="True"
                          Stroke="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}"
                          StrokeThickness="2.5"
                          X1="1"
                          X2="9"
                          Y1="9"
                          Y2="1" />
                </Grid>
            </Button>
        </StackPanel>
        <ControlTemplate.Triggers>
            <MultiDataTrigger>
                <MultiDataTrigger.Conditions>
                    <Condition Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}, Path=IsCloseButtonEnabled}" Value="True" />
                    <Condition Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}, Path=IsAnyDialogOpen}" Value="True" />
                    <Condition Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}, Path=IsCloseButtonEnabledWithDialog}" Value="False" />
                </MultiDataTrigger.Conditions>
                <Setter TargetName="PART_Close" Property="IsEnabled" Value="False" />
            </MultiDataTrigger>
            <DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}, Path=WindowState}" Value="Maximized">
                <Setter TargetName="PART_Max" Property="AutomationProperties.Name" Value="Restore" />
                <Setter TargetName="PART_Max" Property="Command" Value="{x:Static SystemCommands.RestoreWindowCommand}" />
                <Setter TargetName="PART_Max" Property="ToolTip" Value="{Binding Restore, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}" />
                <Setter TargetName="PART_MaxPath" Property="Data" Value="F1M0,10L0,3 3,3 3,0 10,0 10,2 4,2 4,3 7,3 7,6 6,6 6,5 1,5 1,10z M1,10L7,10 7,7 10,7 10,2 9,2 9,6 6,6 6,9 1,9z" />
            </DataTrigger>
            <Trigger Property="Theme" Value="Light">
                <Setter TargetName="PART_Close" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=LightCloseButtonStyle}" />
                <Setter TargetName="PART_Max" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=LightMaxButtonStyle}" />
                <Setter TargetName="PART_Min" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=LightMinButtonStyle}" />
            </Trigger>
            <Trigger Property="Theme" Value="Dark">
                <Setter TargetName="PART_Close" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=DarkCloseButtonStyle}" />
                <Setter TargetName="PART_Max" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=DarkMaxButtonStyle}" />
                <Setter TargetName="PART_Min" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=DarkMinButtonStyle}" />
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>

    <ControlTemplate x:Key="MahApps.Templates.WindowButtonCommands.Win10" TargetType="{x:Type mah:WindowButtonCommands}">
        <StackPanel Orientation="Horizontal">
            <Button x:Name="PART_Min"
                    Width="46"
                    AutomationProperties.AutomationId="Minimize"
                    AutomationProperties.Name="Minimize"
                    Command="{x:Static SystemCommands.MinimizeWindowCommand}"
                    Focusable="False"
                    IsEnabled="{Binding IsMinButtonEnabled, RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}}"
                    ToolTip="{Binding Minimize, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"
                    UseLayoutRounding="True">
                <Button.Visibility>
                    <MultiBinding Converter="{x:Static converters:ResizeModeMinMaxButtonVisibilityConverter.Instance}" ConverterParameter="MIN">
                        <Binding Mode="OneWay"
                                 Path="ShowMinButton"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                        <Binding Mode="OneWay"
                                 Path="UseNoneWindowStyle"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                        <Binding Mode="OneWay"
                                 Path="ResizeMode"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                    </MultiBinding>
                </Button.Visibility>
                <Path Width="10"
                      Height="10"
                      HorizontalAlignment="Center"
                      VerticalAlignment="Center"
                      Data="M0,0L10,0 10,1 10,1 1,1 0,1z"
                      Fill="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}"
                      RenderOptions.EdgeMode="Aliased"
                      SnapsToDevicePixels="True"
                      Stretch="Uniform" />
            </Button>
            <Button x:Name="PART_Max"
                    Width="46"
                    AutomationProperties.AutomationId="MaximizeRestore"
                    AutomationProperties.Name="Maximize"
                    Command="{x:Static SystemCommands.MaximizeWindowCommand}"
                    Focusable="False"
                    IsEnabled="{Binding IsMaxRestoreButtonEnabled, RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}}"
                    ToolTip="{Binding Maximize, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"
                    UseLayoutRounding="True">
                <Button.Visibility>
                    <MultiBinding Converter="{x:Static converters:ResizeModeMinMaxButtonVisibilityConverter.Instance}" ConverterParameter="MAX">
                        <Binding Mode="OneWay"
                                 Path="ShowMaxRestoreButton"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                        <Binding Mode="OneWay"
                                 Path="UseNoneWindowStyle"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                        <Binding Mode="OneWay"
                                 Path="ResizeMode"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                    </MultiBinding>
                </Button.Visibility>
                <!--  normal state  -->
                <Path x:Name="PART_MaxPath"
                      Width="10"
                      Height="10"
                      HorizontalAlignment="Center"
                      VerticalAlignment="Center"
                      Data="M1,1L1,11 11,11 11,1z M0,0L12,0 12,12 0,12z"
                      Fill="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}"
                      RenderOptions.EdgeMode="Aliased"
                      SnapsToDevicePixels="True"
                      Stretch="Uniform" />
            </Button>
            <Button x:Name="PART_Close"
                    Width="46"
                    AutomationProperties.AutomationId="Close"
                    AutomationProperties.Name="Close"
                    Command="{x:Static SystemCommands.CloseWindowCommand}"
                    Focusable="False"
                    IsEnabled="{Binding RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}, Path=IsCloseButtonEnabled, Mode=OneWay}"
                    ToolTip="{Binding Close, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"
                    UseLayoutRounding="True">
                <Button.Visibility>
                    <MultiBinding Converter="{x:Static converters:ResizeModeMinMaxButtonVisibilityConverter.Instance}" ConverterParameter="CLOSE">
                        <Binding Mode="OneWay"
                                 Path="ShowCloseButton"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                        <Binding Mode="OneWay"
                                 Path="UseNoneWindowStyle"
                                 RelativeSource="{RelativeSource AncestorType={x:Type mah:MetroWindow}}" />
                    </MultiBinding>
                </Button.Visibility>
                <Path Width="10"
                      Height="10"
                      HorizontalAlignment="Center"
                      VerticalAlignment="Center"
                      Data="F1M8.583,8L13,12.424 12.424,13 8,8.583 3.576,13 3,12.424 7.417,8 3,3.576 3.576,3 8,7.417 12.424,3 13,3.576z"
                      Fill="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}"
                      RenderOptions.EdgeMode="Aliased"
                      SnapsToDevicePixels="True"
                      Stretch="Uniform" />
            </Button>
        </StackPanel>
        <ControlTemplate.Triggers>
            <MultiDataTrigger>
                <MultiDataTrigger.Conditions>
                    <Condition Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}, Path=IsCloseButtonEnabled}" Value="True" />
                    <Condition Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}, Path=IsAnyDialogOpen}" Value="True" />
                    <Condition Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}, Path=IsCloseButtonEnabledWithDialog}" Value="False" />
                </MultiDataTrigger.Conditions>
                <Setter TargetName="PART_Close" Property="IsEnabled" Value="False" />
            </MultiDataTrigger>
            <DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type mah:MetroWindow}}, Path=WindowState}" Value="Maximized">
                <Setter TargetName="PART_Max" Property="AutomationProperties.Name" Value="Restore" />
                <Setter TargetName="PART_Max" Property="Command" Value="{x:Static SystemCommands.RestoreWindowCommand}" />
                <Setter TargetName="PART_Max" Property="ToolTip" Value="{Binding Restore, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}" />
                <Setter TargetName="PART_MaxPath" Property="Data" Value="M1,4.56L1,14.56 11,14.56 11,4.56z M4,1L4,3.56 12,3.56 12,11 14,11 14,1z M3,0L15,0 15,12 12,12 12,15.56 0,15.56 0,3.56 3,3.56z" />
            </DataTrigger>
            <Trigger Property="Theme" Value="Light">
                <Setter TargetName="PART_Close" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=LightCloseButtonStyle}" />
                <Setter TargetName="PART_Max" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=LightMaxButtonStyle}" />
                <Setter TargetName="PART_Min" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=LightMinButtonStyle}" />
            </Trigger>
            <Trigger Property="Theme" Value="Dark">
                <Setter TargetName="PART_Close" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=DarkCloseButtonStyle}" />
                <Setter TargetName="PART_Max" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=DarkMaxButtonStyle}" />
                <Setter TargetName="PART_Min" Property="Style" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=DarkMinButtonStyle}" />
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>

    <Style x:Key="MahApps.Styles.WindowButtonCommands.Base" TargetType="{x:Type mah:WindowButtonCommands}">
        <Setter Property="Background" Value="{DynamicResource MahApps.Brushes.Transparent}" />
        <Setter Property="DarkCloseButtonStyle" Value="{DynamicResource MahApps.Styles.Button.MetroWindow.Dark}" />
        <Setter Property="DarkMaxButtonStyle" Value="{DynamicResource MahApps.Styles.Button.MetroWindow.Dark}" />
        <Setter Property="DarkMinButtonStyle" Value="{DynamicResource MahApps.Styles.Button.MetroWindow.Dark}" />
        <Setter Property="FocusVisualStyle" Value="{x:Null}" />
        <Setter Property="Foreground" Value="{DynamicResource MahApps.Brushes.ThemeForeground}" />
        <Setter Property="IsTabStop" Value="False" />
        <Setter Property="LightCloseButtonStyle" Value="{DynamicResource MahApps.Styles.Button.MetroWindow.Light}" />
        <Setter Property="LightMaxButtonStyle" Value="{DynamicResource MahApps.Styles.Button.MetroWindow.Light}" />
        <Setter Property="LightMinButtonStyle" Value="{DynamicResource MahApps.Styles.Button.MetroWindow.Light}" />
        <Setter Property="Template" Value="{StaticResource MahApps.Templates.WindowButtonCommands}" />
        <Setter Property="VerticalContentAlignment" Value="Center" />
    </Style>

    <Style x:Key="MahApps.Styles.WindowButtonCommands"
           BasedOn="{StaticResource MahApps.Styles.WindowButtonCommands.Base}"
           TargetType="{x:Type mah:WindowButtonCommands}">
        <Style.Triggers>
            <DataTrigger Binding="{Binding ParentWindow.ShowTitleBar, RelativeSource={RelativeSource Self}}" Value="True">
                <Setter Property="Foreground" Value="{DynamicResource MahApps.Brushes.IdealForeground}" />
            </DataTrigger>
        </Style.Triggers>
    </Style>

    <Style x:Key="MahApps.Styles.WindowButtonCommands.Win10"
           BasedOn="{StaticResource MahApps.Styles.WindowButtonCommands}"
           TargetType="{x:Type mah:WindowButtonCommands}">
        <Setter Property="DarkCloseButtonStyle" Value="{DynamicResource MahApps.Styles.Button.MetroWindow.Close.Dark.Win10}" />
        <Setter Property="LightCloseButtonStyle" Value="{DynamicResource MahApps.Styles.Button.MetroWindow.Close.Light.Win10}" />
        <Setter Property="Template" Value="{StaticResource MahApps.Templates.WindowButtonCommands.Win10}" />
    </Style>

</ResourceDictionary>