Nevron .NET Vision Documentation
Grid

The grid is a view component, which renders a grid behind all document foreground content (i.e. in the View Background Paint Pass). It is represented by an instance of the NGrid class, a reference to which can be obtained from the Grid property of the NView
C#
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// get the grid
NGrid grid = view.Grid;
Visual Basic
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' get the grid
Dim grid as NGrid = view.Grid
Grid Appearance

The grid can be displayed in several styles. The grid style is controlled by the GridStyle property, which can accept one of the following values:

  • MajorLines - draws a grid of major lines
  • MajorDots - draws a grid of major dots
  • MajorMinorLines - draws a grid of major-minor lines
  • Interlaced - horizontal and vertical stripes are displayed on each odd row and col
  • InterlacedHorizontally - horizontal stripes are displayed on each odd row
  • InterlacedVertically - vertical stripes are displayed on each odd col

Depending on the grid style, different self-explanatory properties of the grid are used to control the appearance of the rendered strokes and filled areas. The following example makes an interlaced grid with semi - transparent yellow horizontal stripes, blue vertical stripes and red major lines:

C#
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// show the grid
grid.Visible = true;

// change its style
grid.GridStyle = GridStyle.Interlaced;

// change its appearance
grid.HorizontalStripesFillStyle = new NColorFillStyle(Color.FromArgb(50, Color.Yellow));
grid.VerticalStripesFillStyle = new NColorFillStyle(Color.FromArgb(50, Color.Blue));
grid.MajorLinesStrokeStyle = new NStrokeStyle(1, Color.Red);
Visual Basic
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' show the grid
grid.Visible = True

' change its style
grid.GridStyle = GridStyle.Interlaced

' change its appearance
grid.HorizontalStripesFillStyle = New NColorFillStyle(Color.FromArgb(50, Color.Yellow))
grid.VerticalStripesFillStyle = New NColorFillStyle(Color.FromArgb(50, Color.Blue))
grid.MajorLinesStrokeStyle = New NStrokeStyle(1, Color.Red)

By default the grid is only displayed within the document bounds - i.e. the grid is clipped with the document bounds. You can instruct it to occupy the entire viewport, by setting the ClipWithDocumentBounds property to false:

C#
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// display the grid in the entire viewport
grid.ClipWithDocumentBounds = false;
Visual Basic
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' display the grid in the entire viewport
grid.ClipWithDocumentBounds = False
Origin and Cell Size

The point from which grid lines originate is called origin and is controlled by the Origin property. It is specified in the grid measurement unit. The origin and useful information about it, can optionally be displayed by setting the ShowOrigin property to true:

C#
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// show the grid origin
grid.ShowOrigin = true;
Visual Basic
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' show the grid origin
grid.ShowOrigin = True

The size of the of the grid cells can be determined in several modes. The cell size mode is controlled by the CellSizeMode property, which can accept one of the following values:

The following code makes a fixed grid with cell size (50, 50) in the current grid measurement unit.

C#
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// change the cell size mode to fixed
grid.CellSizeMode = AutoStepMode.Fixed;
// set the fixed cell size
grid.FixedCellSize = new NSizeF(50, 50);
Visual Basic
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' change the cell size mode to fixed
grid.CellSizeMode = AutoStepMode.Fixed
' set the fixed cell size
grid.FixedCellSize = New NSizeF(50, 50)
Related Examples
Windows Forms: Drawing View - Grid
See Also

 

 


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