From 8896a59dff3a5efc5d5be3e999e662bf0f174b60 Mon Sep 17 00:00:00 2001
From: Thomas Geymayer <tomgey@gmail.com>
Date: Thu, 6 Jun 2013 22:28:00 +0200
Subject: [PATCH] Helper functions for SGRect and canvas::Element

---
 simgear/canvas/elements/CanvasElement.cxx |  5 +++
 simgear/canvas/elements/CanvasElement.hxx |  1 +
 simgear/canvas/elements/CanvasImage.cxx   |  2 +-
 simgear/canvas/elements/CanvasImage.hxx   |  2 +-
 simgear/math/SGRect.hxx                   | 44 +++++++++++++++++++++++
 5 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/simgear/canvas/elements/CanvasElement.cxx b/simgear/canvas/elements/CanvasElement.cxx
index fcadfc66..af725d57 100644
--- a/simgear/canvas/elements/CanvasElement.cxx
+++ b/simgear/canvas/elements/CanvasElement.cxx
@@ -244,6 +244,11 @@ namespace canvas
     return _transform;
   }
 
+  osg::ref_ptr<osg::MatrixTransform const> Element::getMatrixTransform() const
+  {
+    return _transform;
+  }
+
   //----------------------------------------------------------------------------
   void Element::childAdded(SGPropertyNode* parent, SGPropertyNode* child)
   {
diff --git a/simgear/canvas/elements/CanvasElement.hxx b/simgear/canvas/elements/CanvasElement.hxx
index 136fd5fc..b7d06f75 100644
--- a/simgear/canvas/elements/CanvasElement.hxx
+++ b/simgear/canvas/elements/CanvasElement.hxx
@@ -103,6 +103,7 @@ namespace canvas
       bool isVisible() const;
 
       osg::ref_ptr<osg::MatrixTransform> getMatrixTransform();
+      osg::ref_ptr<osg::MatrixTransform const> getMatrixTransform() const;
 
       virtual void childAdded( SGPropertyNode * parent,
                                SGPropertyNode * child );
diff --git a/simgear/canvas/elements/CanvasImage.cxx b/simgear/canvas/elements/CanvasImage.cxx
index 5cd5ddc3..bd3e7403 100644
--- a/simgear/canvas/elements/CanvasImage.cxx
+++ b/simgear/canvas/elements/CanvasImage.cxx
@@ -129,7 +129,7 @@ namespace canvas
     {
       addStyle("fill", "color", &Image::setFill);
       addStyle("slice", "", &Image::setSlice);
-      addStyle("slice-width", "numeric", &Image::setSliceWidth);
+      addStyle("slice-width", "", &Image::setSliceWidth);
       addStyle("outset", "", &Image::setOutset);
     }
 
diff --git a/simgear/canvas/elements/CanvasImage.hxx b/simgear/canvas/elements/CanvasImage.hxx
index 3b8dca78..741d74d8 100644
--- a/simgear/canvas/elements/CanvasImage.hxx
+++ b/simgear/canvas/elements/CanvasImage.hxx
@@ -43,7 +43,7 @@ namespace canvas
        */
       Image( const CanvasWeakPtr& canvas,
              const SGPropertyNode_ptr& node,
-             const Style& parent_style,
+             const Style& parent_style = Style(),
              Element* parent = 0 );
       virtual ~Image();
 
diff --git a/simgear/math/SGRect.hxx b/simgear/math/SGRect.hxx
index 7e70a124..ad5771e9 100644
--- a/simgear/math/SGRect.hxx
+++ b/simgear/math/SGRect.hxx
@@ -109,6 +109,26 @@ class SGRect
     void setTop(T t) { _min.y() = t; }
     void setBottom(T b) { _max.y() = b; }
 
+    /**
+     * Move rect by vector
+     */
+    SGRect& operator+=(const SGVec2<T>& offset)
+    {
+      _min += offset;
+      _max += offset;
+      return *this;
+    }
+
+    /**
+     * Move rect by vector in inverse direction
+     */
+    SGRect& operator-=(const SGVec2<T>& offset)
+    {
+      _min -= offset;
+      _max -= offset;
+      return *this;
+    }
+
     bool contains(T x, T y) const
     {
       return _min.x() <= x && x <= _max.x()
@@ -126,6 +146,30 @@ class SGRect
               _max;
 };
 
+template<typename T>
+inline SGRect<T> operator+(SGRect<T> rect, const SGVec2<T>& offset)
+{
+  return rect += offset;
+}
+
+template<typename T>
+inline SGRect<T> operator+(const SGVec2<T>& offset, SGRect<T> rect)
+{
+  return rect += offset;
+}
+
+template<typename T>
+inline SGRect<T> operator-(SGRect<T> rect, const SGVec2<T>& offset)
+{
+  return rect -= offset;
+}
+
+template<typename T>
+inline SGRect<T> operator-(const SGVec2<T>& offset, SGRect<T> rect)
+{
+  return rect -= offset;
+}
+
 template<typename char_type, typename traits_type, typename T>
 inline
 std::basic_ostream<char_type, traits_type>&
-- 
2.39.5