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29 lines
1.5 KiB
Markdown
29 lines
1.5 KiB
Markdown
---
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title: "How to: Create a Custom Panel Element"
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ms.date: "03/30/2017"
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dev_langs:
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- "csharp"
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- "vb"
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- "cpp"
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helpviewer_keywords:
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- "Panel control [WPF]"
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- "custom Panel elements [WPF]"
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ms.assetid: e0df4f1e-8c07-4e86-89a3-e22acfffdc2a
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---
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# How to: Create a Custom Panel Element
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## Example
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This example shows how to override the default layout behavior of the <xref:System.Windows.Controls.Panel> element and create custom layout elements that are derived from <xref:System.Windows.Controls.Panel>.
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The example defines a simple custom <xref:System.Windows.Controls.Panel> element called `PlotPanel`, which positions child elements according to two hard-coded x- and y-coordinates. In this example, `x` and `y` are both set to `50`; therefore, all child elements are positioned at that location on the x and y axes.
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To implement custom <xref:System.Windows.Controls.Panel> behaviors, the example uses the <xref:System.Windows.FrameworkElement.MeasureOverride%2A> and <xref:System.Windows.FrameworkElement.ArrangeOverride%2A> methods. Each method returns the <xref:System.Windows.Size> data that is necessary to position and render child elements.
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[!code-cpp[PlotPanel#1](~/samples/snippets/cpp/VS_Snippets_Wpf/PlotPanel/CPP/PlotPanel.cpp#1)]
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[!code-csharp[PlotPanel#1](~/samples/snippets/csharp/VS_Snippets_Wpf/PlotPanel/CSharp/PlotPanel.cs#1)]
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[!code-vb[PlotPanel#1](~/samples/snippets/visualbasic/VS_Snippets_Wpf/PlotPanel/VisualBasic/PlotPanel.vb#1)]
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## See also
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- <xref:System.Windows.Controls.Panel>
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- [Panels Overview](panels-overview.md)
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