CODEWITHSUNDEEP
wpfxamlborderitemscontrol
eric
eric

Reputation: 1887

How to put a border around an ItemsControl?

I have an itemscontrol with a custom panel inside a usercontrol. The usercontrols size is only constrained by the parent window size.

<UserControl>
  <Grid>
    <Border BorderBrush="DarkGray" BorderThickness="5">
      <ItemsControl ItemsSource="{Binding ActiveGame.Grid.CellsFlat}">
        <ItemsControl.ItemsPanel>
          <ItemsPanelTemplate>
            <Wpf:HexagonalPanel/>
          </ItemsPanelTemplate>
        </ItemsControl.ItemsPanel>
        <ItemsControl.ItemTemplate>
          <DataTemplate>
            <Button />
          </DataTemplate>
        </ItemsControl.ItemTemplate>
      </ItemsControl>
    </Border>
  </Grid>
</UserControl>

I now want the border to be drawn only around the resulting panel. But instead its drawn around the whole grid or probably more precisely at the same size as the grid.

I think I implemented the MeasureOverride correctly on my HexagonalPanel, it returns the correct size, so shouldn't it draw the border at that size?

What am I missing?

Upvotes: 6

Views: 14953

Answers (3)

Joe White
Joe White

Reputation: 97848

You haven't set a size on the ItemsControl, so it will be sized to its parent too. Try setting the ItemsControl's HorizontalAlignment and VerticalAlignment to Center; that will make the ItemsControl's actual size match that of its content.

Upvotes: 6

Bryce Kahle
Bryce Kahle

Reputation: 8227

ItemsControl itself has BorderBrush and BorderThickness properties. You probably want to be using those since ItemsControl has a Border in its ControlTemplate by default.

Upvotes: 5

zamoldar
zamoldar

Reputation: 598

you can achive this,calculating and updating new size value:

public class MyPanel : Panel{
protected override Size ArrangeOverride(Size finalSize){

// calculate new size
........

 this.SetValue(WidthProperty, totalwidth);
  this.SetValue(HeightProperty, totalheight);

return new Size(totalwidth, totalheight);
}
}

Upvotes: 0

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