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">
  <DrawingGroup x:Key="LevelUp">
    <GeometryDrawing Brush="#00FFFFFF" Geometry="F1M16,16L0,16 0,0 16,0z" />
    <GeometryDrawing Brush="#FFF6F6F6"
                     Geometry="F1M14.5,0L6.39,0 5.39,2 2.504,2C1.677,2,1,2.673,1,3.5L1,10.582 1,10.586 1,15.414 3,13.414 3,16 7,16 7,13.414 9,15.414 9,13 14.5,13C15.327,13,16,12.327,16,11.5L16,1.5C16,0.673,15.327,0,14.5,0" />
    <GeometryDrawing Brush="#FFDCB679"
                     Geometry="F1M14,3L7.508,3 8.008,2 8.012,2 14,2z M14.5,1L7.008,1 6.008,3 2.504,3C2.227,3,2,3.224,2,3.5L2,9.582 4.998,6.586 9,10.586 9,12 14.5,12C14.775,12,15,11.776,15,11.5L15,1.5C15,1.224,14.775,1,14.5,1" />
    <GeometryDrawing Brush="#FF00529C" Geometry="F1M8,11L5,8 2,11 2,13 4,11 4,15 6,15 6,11 8,13z" />
    <GeometryDrawing Brush="#FFF0EFF1" Geometry="F1M8.0001,1.9996L7.5001,3.0006 14.0001,3.0006 14.0001,1.9996z" />
  </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"
                       Geometry="F1M1.5,1L9.61,1 10.61,3 13.496,3C14.323,3,14.996,3.673,14.996,4.5L14.996,12.5C14.996,13.327,14.323,14,13.496,14L1.5,14C0.673,14,0,13.327,0,12.5L0,2.5C0,1.673,0.673,1,1.5,1" />
      <GeometryDrawing Brush="#FFDCB67A"
                       Geometry="F1M2,3L8.374,3 8.874,4 2,4z M13.496,4L10,4 9.992,4 8.992,2 1.5,2C1.225,2,1,2.224,1,2.5L1,12.5C1,12.776,1.225,13,1.5,13L13.496,13C13.773,13,13.996,12.776,13.996,12.5L13.996,4.5C13.996,4.224,13.773,4,13.496,4" />
      <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" />
      <GeometryDrawing Brush="#FF9B4E96"
                       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" />
      <GeometryDrawing Brush="#FFEFEFF0"
                       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" />
      <GeometryDrawing Brush="#FF424242"
                       Geometry="F1M13,7L12,7 12,8 13,8z M11,7L10,7 10,8 11,8z M2,10L14,10 14,6.5C14,6.224,13.775,6,13.5,6L2.5,6C2.224,6,2,6.224,2,6.5z M15,11L1,11 1,6.5C1,5.673,1.673,5,2.5,5L13.5,5C14.327,5,15,5.673,15,6.5z" />
    </DrawingGroup>
  </internal:ResourceSelectorConverter>

  <ControlTheme x:Key="{x:Type dialogs:ManagedFileChooser}"
                TargetType="dialogs:ManagedFileChooser">
    <Setter Property="Template">
      <ControlTemplate x:DataType="internal:ManagedFileChooserViewModel">
        <DockPanel>
          <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>
            <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>Show hidden files</TextBlock>
              </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}">OK</Button>
              <Button Command="{Binding Cancel}">Cancel</Button>
            </StackPanel>
          </DockPanel>

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

          <TextBox DockPanel.Dock="Bottom"
                   IsVisible="{Binding !SelectingFolder}"
                   Text="{Binding FileName}"
                   Watermark="File name" />

          <ListBox x:Name="PART_QuickLinks"
                   Margin="0,0,5,5"
                   BorderBrush="Transparent"
                   DockPanel.Dock="Left"
                   Focusable="False"
                   Items="{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="16" SharedSizeGroup="Splitter" />
                <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" />
              </Grid.ColumnDefinitions>
              <GridSplitter Grid.Column="1" />
              <TextBlock Grid.Column="2"
                         Text="Name" />
              <GridSplitter Grid.Column="3" />
              <TextBlock Grid.Column="4"
                         Text="Date Modified" />
              <GridSplitter Grid.Column="5" />
              <TextBlock Grid.Column="6"
                         Text="Type" />
              <GridSplitter Grid.Column="7" />
              <TextBlock Grid.Column="8"
                         Text="Size" />
            </Grid>
            <ListBox x:Name="PART_Files"
                     Margin="0,5"
                     Items="{Binding Items}"
                     ScrollViewer.HorizontalScrollBarVisibility="Disabled"
                     SelectedItems="{Binding SelectedItems}"
                     SelectionMode="{Binding SelectionMode}">
              <ListBox.ItemTemplate>
                <DataTemplate>
                  <Grid Background="Transparent">
                    <Grid.ColumnDefinitions>
                      <ColumnDefinition SharedSizeGroup="Icon" />
                      <ColumnDefinition SharedSizeGroup="Splitter" />
                      <ColumnDefinition SharedSizeGroup="Name" />
                      <ColumnDefinition SharedSizeGroup="Splitter" />
                      <ColumnDefinition SharedSizeGroup="Modified" />
                      <ColumnDefinition SharedSizeGroup="Splitter" />
                      <ColumnDefinition SharedSizeGroup="Type" />
                      <ColumnDefinition SharedSizeGroup="Splitter" />
                      <ColumnDefinition SharedSizeGroup="Size" />
                    </Grid.ColumnDefinitions>
                    <Image Grid.Column="0"
                           Width="16"
                           Height="16">
                      <DrawingImage Drawing="{Binding IconKey, Converter={StaticResource Icons}}" />
                    </Image>
                    <TextBlock Grid.Column="2"
                               Text="{Binding DisplayName}" />
                    <TextBlock Grid.Column="4"
                               Text="{Binding Modified}" />
                    <TextBlock Grid.Column="6"
                               Text="{Binding Type}" />
                    <TextBlock Grid.Column="8">
                      <TextBlock.Text>
                        <Binding Path="Size">
                          <Binding.Converter>
                            <internal:FileSizeStringConverter />
                          </Binding.Converter>
                        </Binding>
                      </TextBlock.Text>
                    </TextBlock>
                  </Grid>
                </DataTemplate>
              </ListBox.ItemTemplate>
            </ListBox>
          </DockPanel>
        </DockPanel>
      </ControlTemplate>
    </Setter>
  </ControlTheme>
</ResourceDictionary>