mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/Base/Core/Internal/PropertyEditing/FromExpression/Framework/ValueEditors/RenderUtils.cs

   1 // -------------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 // -------------------------------------------------------------------
   4 //From \\authoring\Sparkle\Source\1.0.1083.0\Common\Source\Framework\ValueEditors
   5 namespace System.Activities.Presentation.Internal.PropertyEditing.FromExpression.Framework.ValueEditors
   6 {
   7     using System;
   8     using System.Windows;
   9     using System.Windows.Media;
  10
  11     internal sealed class RenderUtils
  12     {
  13         private RenderUtils()
  14         {
  15         }
  16
  17         public static bool DrawInscribedRoundedRect(DrawingContext drawingContext, Brush fill, Pen stroke, Rect outerBounds, double cornerRadius)
  18         {
  19             Point spineLeftTop = new Point(outerBounds.Left, outerBounds.Top);
  20             Point spineRightBottom = new Point(outerBounds.Right, outerBounds.Bottom);
  21             bool drewSomething = false;
  22
  23             if (stroke != null && !Tolerances.NearZero(stroke.Thickness))
  24             {
  25                 double halfThickness = stroke.Thickness / 2d;
  26                 spineLeftTop.X += halfThickness;
  27                 spineLeftTop.Y += halfThickness;
  28                 spineRightBottom.X -= halfThickness;
  29                 spineRightBottom.Y -= halfThickness;
  30             }
  31
  32             Rect spineRect = new Rect(spineLeftTop, spineRightBottom);
  33             if (!Tolerances.NearZero(spineRect.Width) && !Tolerances.NearZero(spineRect.Height))
  34             {
  35                 drawingContext.DrawRoundedRectangle(fill, stroke, spineRect, cornerRadius, cornerRadius);
  36                 drewSomething = true;
  37             }
  38
  39             return drewSomething;
  40         }
  41
  42         public static Rect CalculateInnerRect(Rect outerBounds, double strokeThickness)
  43         {
  44             if (!Tolerances.NearZero(strokeThickness))
  45             {
  46                 return new Rect(new Point(outerBounds.Left + strokeThickness, outerBounds.Top + strokeThickness), new Point(outerBounds.Right - strokeThickness, outerBounds.Bottom - strokeThickness));
  47             }
  48             else
  49             {
  50                 return outerBounds;
  51             }
  52         }
  53     }
  54 }