#1,169 – Custom Panel, part I (Measure and Arrange)

You can create a class that derives from Panel in order to create a panel control with custom behavior.  You typically override the following two methods in your custom panel:

  • MeasureOverride – You call Measure method on each child element to determine how much space they need, then return the total space needed
  • ArrangeOverride – You call Arrange method for each child element to position them

Below is a very simple example–a panel that does nothing in either its MeasureOverride or ArrangeOverride methods.  We’ll build on this class in future posts.

    public class MyPanel : Panel
    {
        protected override Size MeasureOverride(Size availableSize)
        {
            Size measuredSize = base.MeasureOverride(availableSize);
            return measuredSize;
        }

        protected override Size ArrangeOverride(Size finalSize)
        {
            Size arrangedSize = base.ArrangeOverride(finalSize);
            return arrangedSize;
        }
    }

If we add children to this panel, they will not be displayed. Below is debug output at run-time. MeasureOverride returns (0,0) because we haven’t calculated any sizes.
1169-001

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

One Response to #1,169 – Custom Panel, part I (Measure and Arrange)

  1. Pingback: Dew Drop – September 30, 2014 (#1866) | Morning Dew

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