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SquarifiedLayoutAlgorithm Class

A class representing the Squarified layout algorithm.

Namespace: DevExpress.Xpf.TreeMap

Assembly: DevExpress.Xpf.TreeMap.v24.1.dll

NuGet Package: DevExpress.Wpf.TreeMap

Declaration

public class SquarifiedLayoutAlgorithm :
    TreeMapLayoutAlgorithm

Remarks

The idea of the algorithm is to layout the rectangles along the required direction in the available display area as long as the highest width/height ratio of any rectangle in the current row keeps improving. Once the highest aspect ratio among the rectangles has reached a minimum, and adding another rectangle to the current row would increase the worst aspect ratio, the current row is fixed and a new row is created.

The following image demonstrates the tree map layout calculated using this algorithm.

SquarifiedLayoutAlgorithm

Example

To customize the layout algorithm, do the following.

<dxtm:TreeMapControl x:Name="treeMap"
                     LayoutAlgorithm="{Binding ElementName=lbLayoutAlgorithm, Path=SelectedValue}">
    <!-- endregion #LayoutAlgorithm-->
    <dxtm:TreeMapControl.Colorizer>
        <dxtm:TreeMapPaletteColorizer/>
    </dxtm:TreeMapControl.Colorizer>
    <dxtm:TreeMapItemStorage>
        <dxtm:TreeMapItem Label="Americas">
            <dxtm:TreeMapItem Label="United States" Value="17.418"/>
            <dxtm:TreeMapItem Label="Brazil" Value="2.353"/>
        </dxtm:TreeMapItem>
        <dxtm:TreeMapItem Label="Europe">
            <dxtm:TreeMapItem Label="Germany" Value="3.859"/>
            <dxtm:TreeMapItem Label="United Kingdom" Value="2.945"/>
            <dxtm:TreeMapItem Label="France" Value="2.846"/>
            <dxtm:TreeMapItem Label="Italy" Value="2.147"/>
            <dxtm:TreeMapItem Label="Russia" Value="1.857"/>
        </dxtm:TreeMapItem>
        <dxtm:TreeMapItem Label="Asia">
            <dxtm:TreeMapItem Label="China" Value="10.380"/>
            <dxtm:TreeMapItem Label="Japan" Value="4.616"/>
            <dxtm:TreeMapItem Label="India" Value="2.049"/>
        </dxtm:TreeMapItem>
    </dxtm:TreeMapItemStorage>
    <!--region #CloseTag-->
</dxtm:TreeMapControl>
<!--endregion #CloseTag-->
<Grid Grid.Column="1" Margin="4">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>
    <TextBlock Grid.Row="0" 
               Margin="0,0,0,4"
               Text="Layout Algorithm:"/>
    <!--region #LayoutAlgorithmList-->
    <ListBox x:Name="lbLayoutAlgorithm"
             Grid.Row="1"
             DisplayMemberPath="LayoutAlgorithmName"
             SelectedValuePath="LayoutAlgorithm"
             SelectedIndex="0">
        <local:LayoutAlgorithmWarapper LayoutAlgorithmName="Slice and Dice">
            <dxtm:SliceAndDiceLayoutAlgorithm/>
        </local:LayoutAlgorithmWarapper>
        <local:LayoutAlgorithmWarapper LayoutAlgorithmName="Squarified">
            <dxtm:SquarifiedLayoutAlgorithm/>
        </local:LayoutAlgorithmWarapper>
        <local:LayoutAlgorithmWarapper LayoutAlgorithmName="Striped">
            <dxtm:StripedLayoutAlgorithm/>
        </local:LayoutAlgorithmWarapper>
    </ListBox>
See Also