BoundsRules Class

Rules that constrain where a shape can be located and how it can be sized.

Inheritance Hierarchy

System.Object
  Microsoft.VisualStudio.Modeling.Diagrams.BoundsRules
    Microsoft.VisualStudio.Modeling.Diagrams.AvoidCornerRule
    Microsoft.VisualStudio.Modeling.Diagrams.DefaultBoundsRules
    Microsoft.VisualStudio.Modeling.Diagrams.KeepInParentRule
    Microsoft.VisualStudio.Modeling.Diagrams.NoBoundsRules
    Microsoft.VisualStudio.Modeling.Diagrams.PortMovementRule
    Microsoft.VisualStudio.Modeling.Diagrams.SnapToGridRule
    Microsoft.VisualStudio.Modeling.Diagrams.SnapToPerimeterFollowingRotationRule

Namespace:  Microsoft.VisualStudio.Modeling.Diagrams
Assembly:  Microsoft.VisualStudio.Modeling.Sdk.Diagrams.10.0 (in Microsoft.VisualStudio.Modeling.Sdk.Diagrams.10.0.dll)

Syntax

'Déclaration
<SerializableAttribute> _
Public MustInherit Class BoundsRules

[SerializableAttribute]
public abstract class BoundsRules

[SerializableAttribute]
public ref class BoundsRules abstract

[<AbstractClass>]
[<SerializableAttribute>]
type BoundsRules =  class end

public abstract class BoundsRules

The BoundsRules type exposes the following members.

Constructors

	Name	Description
	BoundsRules

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Methods

	Name	Description
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetCompliantBounds	Adjust a proposed size and position so that they are compliant with this bounds rule. Called repeatedly while the user moves the mouse. The ghost shape shows the user the compliant bounds.
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

A Bounds Rule is a class that defines limits on the size and location of a shape. GetCompliantBounds is called repeatedly while a user is dragging a shape or the corners or sides of a shape.

For more information, see BoundsRules Constrain Shape Location and Size.

Examples

The following example constrains a rectangular shape to be a bar of fixed size, either horizontal or vertical. When the user drags the corners or sides, the outline flips between the two permitted configurations of height and width.

Notice that both the location and size can be constrained if you want.

The bounds rule is a class, and an instance is created in the shape:

using Microsoft.VisualStudio.Modeling.Diagrams; ...
public partial class BarShape
{
  /// <summary>
  /// Rule invoked when the user is resizing a shape.
  /// </summary>
  public override BoundsRules BoundsRules
  { get { return new BarBoundsRule(); } }
}
/// <summary>
/// Rule invoked when the user is changing a shape's outline.
/// Provides real-time mouse rubber-band feedback, so must work fast.
/// </summary>
public class BarBoundsRule: BoundsRules
{ 
  public override RectangleD GetCompliantBounds 
     (ShapeElement shape, RectangleD proposedBounds)
  {
    double thickness = 0.1;
    if (proposedBounds.Height > proposedBounds.Width)
    {
      // There is a minimum width for a shape; the width
      // will actually be set to the lesser of 
      // thickness and that minimum.
      return new RectangleD(proposedBounds.Location, 
            new SizeD(thickness, proposedBounds.Height));
    }
    else
    {
      // There is a minimum height for a shape; the 
      // height will actually be set to the lesser of 
      // thickness and that minimum.
      return new RectangleD(proposedBounds.Location, 
         new SizeD(proposedBounds.Width, thickness));
} } }

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

See Also

Reference

Microsoft.VisualStudio.Modeling.Diagrams Namespace

Other Resources

BoundsRules Constrain Shape Location and Size

Change History

Date	History	Reason
June 2010	Added description and example.	Customer feedback.