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Chart for .NET / User's Guide / Layout / Content Panels / Content Panels Overview

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    Content Panels Overview
    In This Topic

    Each panel that has paintable content inherits directly or indirectly from the NContentPanel class. In practice all chart panels except the root are content panels.

    The content panel has several properties controlling it's visibility, size, content alignment and bounds mode. The following sections discuss each one of them in detail.

     Visibility

    The visibility of each content panel is controlled through the Visible property. By default this property is set to true, but you can set it to false if you want to hide a panel. The following code will hide the first chart in the Charts collection.

    C#
    Copy Code 
    NChart chart = chartControl.Charts[0];
chart.Visible = false;
chartControl.Refresh();
    Visual Basic
    Copy Code 
    Dim chart As NChart = chartControl.Charts(0)

chart.Visible = False

chartControl.Refresh()
     Size

    The size of the panel is controlled by the Size property accepting values in NSizeL format. Note that this property may be discarded in the layout calculation if one of the following conditions are met:

    • The panel is in docking mode. In this case only the relevant dimensions (Width or Height) will be taken into account when calculating the bounds of the panel. This applies only to panels that are dockable.
    • The panel is in auto size mode. In this case the panel will automatically compute its best size and the value of the Size property is discarded. This applies only to auto sizeable panels.

      The following example will create a watermark image with gradient fill style occupying the left top corner of the chart canvas.

      C#
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      NWatermark watermark = new NWatermark();
watermark.Location = new NPointL(0, 0);
watermark.Size = new NSizeL( new NLength(50, NRelativeUnit.ParentPercentage), new NLength(50, NRelativeUnit.ParentPercentage));
watermark.UseAutomaticSize = false;
watermark.FillStyle = new NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.White, Color.DarkBlue);

chartControl.Panels.Add(watermark);
      Visual Basic
      Copy Code 
      Dim watermark As New NWatermark
watermark.Location = New NPointL(0, 0)
watermark.Size = New NSizeL(New NLength(50, NRelativeUnit.ParentPercentage), New NLength(50, NRelativeUnit.ParentPercentage))
watermark.UseAutomaticSize = False
watermark.FillStyle = New NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.White, Color.DarkBlue)

chartControl.Panels.Add(watermark)
      Note that we turned off the automatic size calculation for the panel (UseAutomaticSize = false).
     Content Alignment

    Each content panel has an associated ContentAlignment property defining how the content is aligned relative to the panel location or bounds. The following table shows how the content alignment works together with the location property:

    Top Left Top Center Top Right
    Middle Left Middle Center Middle Right
    Bottom Left Bottom Center Bottom Right

    The red lines on the above images represent the coordinate specified by the location property.

     Fit Alignment

    When the panel is docked the FitAlignment defines how the panel content will be positioned relative to the panel bounds determined by the docking. The following table shows this:

    Top Left Top Center Top Right
    Middle Left Middle Center Middle Right
    Bottom Left Bottom Center Bottom Right
     
    See Also
    NContentPanel