How to disable left, right, top and bottom drop targets in AvalonDock 2(LayoutDocumentPane)

Question

I'm trying to disable drop targets except the center one in avalon dock. Couldn't find any documentation to do that in codeplex. I found one similar question in stackoverflow here but no correct response so asking again.

[Answered the other question](http://stackoverflow.com/a/43326676/3895469) — oddRaven, Apr 10 '17 at 15:05

score 0 · Accepted Answer · answered May 09 '18 at 20:41

As an option, you can override OverlayWindow control style and remove or change drop areas from it:

<Style x:Key="{x:Type avalonDockControls:OverlayWindow}"
     TargetType="{x:Type avalonDockControls:OverlayWindow}">
...
        <Grid x:Name="PART_AnchorablePaneDropTargets">
          <Grid Width="88"
                Height="88"
                VerticalAlignment="Center"
                HorizontalAlignment="Center">
            <Grid.ColumnDefinitions>
              <ColumnDefinition />
              <ColumnDefinition />
              <ColumnDefinition />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
              <RowDefinition />
              <RowDefinition />
              <RowDefinition />
            </Grid.RowDefinitions>
            <Image Grid.ColumnSpan="3"
                   Grid.RowSpan="3"
                   Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/DockPaneEmpty.PNG"
                   Stretch="Uniform">
            </Image>
            <Border Name="PART_AnchorablePaneDropTargetTop"
                    Grid.Column="1"
                    Grid.Row="0">
              <Image Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/InnerDockPaneTop.png"
                     Stretch="None">
              </Image>
            </Border>
            <Border Name="PART_AnchorablePaneDropTargetRight"
                    Grid.Column="2"
                    Grid.Row="1">
              <Image Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/InnerDockPaneRight.png"
                     Stretch="None">
              </Image>
            </Border>
            <Border Name="PART_AnchorablePaneDropTargetBottom"
                    Grid.Column="1"
                    Grid.Row="2">
              <Image Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/InnerDockPaneBottom.png"
                     Stretch="None">
              </Image>
            </Border>
            <Border Name="PART_AnchorablePaneDropTargetLeft"
                    Grid.Column="0"
                    Grid.Row="1">
              <Image Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/InnerDockPaneLeft.png"
                     Stretch="None">
              </Image>
            </Border>
            <Border Name="PART_AnchorablePaneDropTargetInto"
                    Grid.Column="1"
                    Grid.Row="1">
              <Image Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/InnerDockPaneInside.png"
                     Stretch="None">
              </Image>
            </Border>
          </Grid>
        </Grid>
        <Grid x:Name="PART_DocumentPaneDropTargets">
          <Grid Width="88"
                Height="88"
                VerticalAlignment="Center"
                HorizontalAlignment="Center">
            <Grid.ColumnDefinitions>
              <ColumnDefinition />
              <ColumnDefinition />
              <ColumnDefinition />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
              <RowDefinition />
              <RowDefinition />
              <RowDefinition />
            </Grid.RowDefinitions>
            <Image Grid.ColumnSpan="3"
                   Grid.RowSpan="3"
                   Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/DockPaneEmpty.PNG"
                   Stretch="Uniform">
            </Image>
            <Border Name="PART_DocumentPaneDropTargetTop"
                    Grid.Column="1"
                    Grid.Row="0">
              <Image Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/InnerDockDocPaneTop.png"
                     Stretch="None">
              </Image>
            </Border>
            <Border Name="PART_DocumentPaneDropTargetRight"
                    Grid.Column="2"
                    Grid.Row="1">
              <Image Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/InnerDockDocPaneRight.png"
                     Stretch="None">
              </Image>
            </Border>
            <Border Name="PART_DocumentPaneDropTargetBottom"
                    Grid.Column="1"
                    Grid.Row="2">
              <Image Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/InnerDockDocPaneBottom.png"
                     Stretch="None">
              </Image>
            </Border>
            <Border Name="PART_DocumentPaneDropTargetLeft"
                    Grid.Column="0"
                    Grid.Row="1">
              <Image Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/InnerDockDocPaneLeft.png"
                     Stretch="None">
              </Image>
            </Border>
            <Border Name="PART_DocumentPaneDropTargetInto"
                    Grid.Column="1"
                    Grid.Row="1">
              <Image Source="/Xceed.Wpf.AvalonDock;component/Themes/Generic/Images/InnerDockPaneInside.png"
                     Stretch="None">
              </Image>
            </Border>
          </Grid>
        </Grid>
      </Canvas>
    </ControlTemplate>
  </Setter.Value>
</Setter>

The elements you will need to change have "DropTarget" in their names. Full version of style is here: https://github.com/xceedsoftware/wpftoolkit/blob/master/ExtendedWPFToolkitSolution/Src/Xceed.Wpf.AvalonDock/Themes/generic.xaml starting from line 479.

How to disable left, right, top and bottom drop targets in AvalonDock 2(LayoutDocumentPane)

1 Answers1