Avalonia/src/Avalonia.Themes.Simple/Controls/ManagedFileChooser.xaml

<ResourceDictionary xmlns="https://github.com/avaloniaui"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:dialogs="using:Avalonia.Dialogs"
                    xmlns:internal="using:Avalonia.Dialogs.Internal"
                    xmlns:converters="clr-namespace:Avalonia.Controls.Converters;assembly=Avalonia.Controls"
                    x:ClassModifier="internal">
  <DrawingGroup x:Key="LevelUp">
    <GeometryDrawing Brush="#00FFFFFF" Geometry="F1M16,16L0,16 0,0 16,0z" />
    <GeometryDrawing Brush="#FFF6F6F6"
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  </DrawingGroup>
  <DrawingGroup x:Key="Refresh">
    <GeometryDrawing Brush="#FFF6F6F6"
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  </DrawingGroup>
  <internal:ResourceSelectorConverter x:Key="Icons">
    <DrawingGroup x:Key="Icon_Folder">
      <GeometryDrawing Brush="#00FFFFFF" Geometry="F1M0,0L16,0 16,16 0,16z" />
      <GeometryDrawing Brush="#FFF6F6F6"
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      <GeometryDrawing Brush="#FFEFEFF0" Geometry="F1M2,3L8.374,3 8.874,4 2,4z" />
    </DrawingGroup>
    <DrawingGroup x:Key="Icon_File">
      <GeometryDrawing Brush="#00FFFFFF" Geometry="F1M16,16L0,16 0,0 16,0z" />
      <GeometryDrawing Brush="#FFF6F6F6"
                       Geometry="F1M4,15C3.03,15,2,14.299,2,13L2,3C2,1.701,3.03,1,4,1L10.061,1 14,4.556 14,13C14,13.97,13.299,15,12,15z" />
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                       Geometry="F1M12,13L4,13 4,3 9,3 9,6 12,6z M9.641,2L3.964,2C3.964,2,3,2,3,3L3,13C3,14,3.964,14,3.964,14L11.965,14C12.965,14,13,13,13,13L13,5z" />
      <GeometryDrawing Brush="#FFF0EFF1" Geometry="F1M4,3L9,3 9,6 12,6 12,13 4,13z" />
    </DrawingGroup>
    <DrawingGroup x:Key="Icon_Volume">
      <GeometryDrawing Brush="#00FFFFFF" Geometry="F1M16,16L0,16 0,0 16,0z" />
      <GeometryDrawing Brush="#FFF6F6F6"
                       Geometry="F1M0,12L0,6.5C0,5.122,1.122,4,2.5,4L13.5,4C14.879,4,16,5.122,16,6.5L16,12z" />
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                       Geometry="F1M13,8L12,8 12,7 13,7z M11,8L10,8 10,7 11,7z M13.5,6L2.5,6C2.224,6,2,6.224,2,6.5L2,10 14,10 14,6.5C14,6.224,13.775,6,13.5,6" />
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    </DrawingGroup>
  </internal:ResourceSelectorConverter>

  <ControlTheme x:Key="{x:Type dialogs:ManagedFileChooser}"
                TargetType="dialogs:ManagedFileChooser">
    <Setter Property="Background" Value="{DynamicResource ThemeBackgroundBrush}" />
    <Setter Property="Template">
      <ControlTemplate x:DataType="internal:ManagedFileChooserViewModel">
        <Border Background="{TemplateBinding Background}"
                BorderBrush="{TemplateBinding BorderBrush}"
                BorderThickness="{TemplateBinding BorderThickness}"
                CornerRadius="{TemplateBinding CornerRadius}"
                Padding="{TemplateBinding Padding}">
          <DockPanel Margin="5">
            <DockPanel Margin="0,0,0,5"
                       DockPanel.Dock="Top">
              <internal:ChildFitter Width="{Binding ElementName=Location, Path=Bounds.Height}"
                                   DockPanel.Dock="Right">
                <Button Command="{Binding GoUp}">
                  <Image Stretch="Fill">
                    <DrawingImage Drawing="{StaticResource LevelUp}" />
                  </Image>
                </Button>
              </internal:ChildFitter>
              <internal:ChildFitter Width="{Binding ElementName=Location, Path=Bounds.Height}"
                                   DockPanel.Dock="Right">
                <Button Command="{Binding Refresh}">
                  <Image Stretch="Fill">
                    <DrawingImage Drawing="{StaticResource Refresh}" />
                  </Image>
                </Button>
              </internal:ChildFitter>
              <TextBox x:Name="Location"
                       Margin="0,0,5,0"
                       Text="{Binding Location}">
                <TextBox.KeyBindings>
                  <KeyBinding Command="{Binding EnterPressed}"
                              Gesture="Enter" />
                </TextBox.KeyBindings>
              </TextBox>
            </DockPanel>
            <DockPanel Margin="0,5,0,0"
                       DockPanel.Dock="Bottom">
              <StackPanel DockPanel.Dock="Left"
                          Orientation="Horizontal">
                <CheckBox IsChecked="{Binding ShowHiddenFiles}">
                  <TextBlock Text="{DynamicResource StringManagedFileChooserShowHiddenFilesText}" />
                </CheckBox>
              </StackPanel>
              <StackPanel HorizontalAlignment="Right"
                          Orientation="Horizontal"
                          Spacing="10">
                <StackPanel.Styles>
                  <Style Selector="Button">
                    <Setter Property="Margin" Value="4" />
                  </Style>
                </StackPanel.Styles>
                <Button Command="{Binding Ok}" MinWidth="60" Content="{DynamicResource StringManagedFileChooserOkText}" />
                <Button Command="{Binding Cancel}" MinWidth="60" Content="{DynamicResource StringManagedFileChooserCancelText}" />
              </StackPanel>
            </DockPanel>

            <ComboBox Margin="0,5,0,0"
                      DockPanel.Dock="Bottom"
                      IsVisible="{Binding ShowFilters}"
                      ItemsSource="{Binding Filters}"
                      SelectedItem="{Binding SelectedFilter}" />

            <TextBox DockPanel.Dock="Bottom"
                     IsVisible="{Binding !SelectingFolder}"
                     Text="{Binding FileName}"
                     PlaceholderText="{DynamicResource StringManagedFileChooserFileNamePlaceholder}" />

            <ListBox x:Name="PART_QuickLinks"
                     MaxWidth="200"
                     Margin="0,0,5,5"
                     BorderBrush="Transparent"
                     DockPanel.Dock="Left"
                     Focusable="False"
                     ItemsSource="{Binding QuickLinks}"
                     SelectedIndex="{Binding QuickLinksSelectedIndex}">
              <ListBox.ItemTemplate>
                <DataTemplate>
                  <StackPanel Background="Transparent"
                              Orientation="Horizontal"
                              Spacing="4">
                    <Image Width="16"
                           Height="16">
                      <DrawingImage Drawing="{Binding IconKey, Converter={StaticResource Icons}}" />
                    </Image>
                    <TextBlock Text="{Binding DisplayName}" />
                  </StackPanel>
                </DataTemplate>
              </ListBox.ItemTemplate>
            </ListBox>
            <DockPanel Grid.IsSharedSizeScope="True">
              <Grid Margin="15,5,0,0"
                    HorizontalAlignment="Stretch"
                    DockPanel.Dock="Top">
                <Grid.ColumnDefinitions>
                  <ColumnDefinition Width="20" SharedSizeGroup="Icon" />
                  <ColumnDefinition Width="400" SharedSizeGroup="Name" />
                  <ColumnDefinition Width="16" SharedSizeGroup="Splitter" />
                  <ColumnDefinition Width="200" SharedSizeGroup="Modified" />
                  <ColumnDefinition Width="16" SharedSizeGroup="Splitter" />
                  <ColumnDefinition Width="150" SharedSizeGroup="Type" />
                  <ColumnDefinition Width="16" SharedSizeGroup="Splitter" />
                  <ColumnDefinition Width="200" SharedSizeGroup="Size" />
                  <ColumnDefinition Width="16" SharedSizeGroup="Splitter" />
                </Grid.ColumnDefinitions>
                <TextBlock Grid.Column="1"
                           Text="{DynamicResource StringManagedFileChooserNameColumn}" />
                <GridSplitter Grid.Column="2"
                              ResizeDirection="Columns"
                              Background="Transparent" />
                <Rectangle HorizontalAlignment="Left" Grid.Column="2" VerticalAlignment="Stretch" Width="1" Fill="{DynamicResource ThemeControlMidBrush}"/>
                <TextBlock Grid.Column="3"
                           Text="{DynamicResource StringManagedFileChooserDateModifiedColumn}" />
                <GridSplitter Grid.Column="4"
                              ResizeDirection="Columns"
                              Background="Transparent" />
                <Rectangle HorizontalAlignment="Left"
                           Grid.Column="4"
                           VerticalAlignment="Stretch"
                           Width="1"
                           Fill="{DynamicResource ThemeControlMidBrush}"/>

                <TextBlock Grid.Column="5"
                           Text="{DynamicResource StringManagedFileChooserTypeColumn}" />
                <GridSplitter Grid.Column="6" ResizeDirection="Columns"
                              Background="Transparent" />
                <Rectangle HorizontalAlignment="Left"
                           Grid.Column="6"
                           VerticalAlignment="Stretch"
                           Width="1"
                           Fill="{DynamicResource ThemeControlMidBrush}"/>

                <TextBlock Grid.Column="7"
                           Text="{DynamicResource StringManagedFileChooserSizeColumn}" />
                <GridSplitter Grid.Column="8"
                              ResizeDirection="Columns"
                              Background="Transparent" />
                <Rectangle HorizontalAlignment="Left"
                           Grid.Column="8"
                           VerticalAlignment="Stretch"
                           Width="1"
                           Fill="{DynamicResource ThemeControlMidBrush}"/>
              </Grid>
              <ListBox x:Name="PART_Files"
                       Margin="0,5"
                       ItemsSource="{Binding Items}"
                       ScrollViewer.HorizontalScrollBarVisibility="Disabled"
                       SelectedItems="{Binding SelectedItems}"
                       SelectionMode="{Binding SelectionMode}">
                <ListBox.ItemTemplate>
                  <DataTemplate>
                    <Grid Background="Transparent">
                      <Grid.ColumnDefinitions>
                        <ColumnDefinition SharedSizeGroup="Icon" />
                        <ColumnDefinition SharedSizeGroup="Name" />
                        <ColumnDefinition SharedSizeGroup="Splitter" />
                        <ColumnDefinition SharedSizeGroup="Modified" />
                        <ColumnDefinition SharedSizeGroup="Splitter" />
                        <ColumnDefinition SharedSizeGroup="Type" />
                        <ColumnDefinition SharedSizeGroup="Splitter" />
                        <ColumnDefinition SharedSizeGroup="Size" />
                        <ColumnDefinition SharedSizeGroup="Splitter" />
                      </Grid.ColumnDefinitions>
                      <Image Grid.Column="0"
                             Width="16"
                             Height="16">
                        <DrawingImage Drawing="{Binding IconKey, Converter={StaticResource Icons}}" />
                      </Image>
                      <TextBlock Grid.Column="1"
                                 Text="{Binding DisplayName}" />
                      <TextBlock Grid.Column="3"
                                 Text="{Binding Modified}" />
                      <TextBlock Grid.Column="5"
                                 Text="{Binding Type}" />
                      <TextBlock Grid.Column="7" HorizontalAlignment="Right">
                        <TextBlock.Text>
                          <Binding Path="Size">
                            <Binding.Converter>
                              <internal:FileSizeStringConverter />
                            </Binding.Converter>
                          </Binding>
                        </TextBlock.Text>
                      </TextBlock>
                    </Grid>
                  </DataTemplate>
                </ListBox.ItemTemplate>
              </ListBox>
            </DockPanel>
          </DockPanel>
        </Border>
      </ControlTemplate>
    </Setter>
  </ControlTheme>

  <ControlTheme x:Key="{x:Type dialogs:ManagedFileChooserOverwritePrompt}" TargetType="dialogs:ManagedFileChooserOverwritePrompt">
    <Setter Property="MinWidth" Value="270" />
    <Setter Property="MaxWidth" Value="400" />
    <Setter Property="Template">
      <ControlTemplate>
        <Border Background="{TemplateBinding Background}"
                BorderBrush="{TemplateBinding BorderBrush}"
                BorderThickness="{TemplateBinding BorderThickness}"
                CornerRadius="{TemplateBinding CornerRadius}"
                Padding="{TemplateBinding Padding}">
          <StackPanel Spacing="10">
            <TextBlock TextWrapping="Wrap">
              <TextBlock.Text>
                <MultiBinding>
                  <MultiBinding.Converter>
                    <converters:StringFormatConverter />
                  </MultiBinding.Converter>
                  <DynamicResource ResourceKey="StringManagedFileChooserOverwritePromptFileAlreadyExistsText"/>
                  <Binding Path ="FileName" RelativeSource="{RelativeSource TemplatedParent}" />
                </MultiBinding>
              </TextBlock.Text>
            </TextBlock>
            <StackPanel HorizontalAlignment="Right"
                        Spacing="10"
                        Orientation="Horizontal">
              <Button Classes="accent" Content="{DynamicResource StringManagedFileChooserOverwritePromptConfirmText}"
                      MinWidth="80"
                      HorizontalContentAlignment="Center"
                      IsDefault="True"
                      Command="{Binding Confirm, RelativeSource={RelativeSource TemplatedParent}}" />
              <Button Content="{DynamicResource StringManagedFileChooserOverwritePromptCancelText}"
                      MinWidth="80"
                      IsCancel="True"
                      HorizontalContentAlignment="Center"
                      Command="{Binding Cancel, RelativeSource={RelativeSource TemplatedParent}}"  />
            </StackPanel>
          </StackPanel>
        </Border>
      </ControlTemplate>
    </Setter>
  </ControlTheme>
</ResourceDictionary>