added separate Ruler class.

1 files changed, 67 insertions, 0 deletions

diff --git a/map/ruler.hpp b/map/ruler.hpp
new file mode 100644
index 0000000000..ee57ac38c8
--- /dev/null
+++ b/map/ruler.hpp
@@ -0,0 +1,67 @@
+#pragma once
+
+#include "../geometry/screenbase.hpp"
+#include "../geometry/point2d.hpp"
+#include "../geometry/aa_rect2d.hpp"
+#include "../yg/overlay_element.hpp"
+#include "../yg/font_desc.hpp"
+
+namespace yg
+{
+  class StylesCache;
+
+  namespace gl
+  {
+    class Screen;
+    class OverlayRenderer;
+  }
+}
+
+class Ruler : public yg::OverlayElement
+{
+private:
+
+  unsigned m_minPxWidth;
+  unsigned m_maxPxWidth;
+
+  double m_minUnitsWidth;
+  double m_maxUnitsWidth;
+  double m_visualScale;
+
+  yg::FontDesc m_fontDesc;
+  ScreenBase m_screen;
+
+  float m_unitsDiff; //< current diff in units between two endpoints of the ruler.
+  string m_scalerText;
+  vector<m2::PointD> m_path;
+
+  m2::RectD m_boundRect;
+
+  unsigned ceil(double unitsDiff);
+
+  typedef OverlayElement base_t;
+
+public:
+
+  void update(); //< update internal params after some other params changed.
+
+  struct Params : public base_t::Params
+  {
+  };
+
+  Ruler(Params const & p);
+
+  void setScreen(ScreenBase const & screen);
+  ScreenBase const & screen() const;
+
+  void setMinPxWidth(unsigned minPxWidth);
+  void setMinUnitsWidth(double minUnitsWidth);
+  void setMaxUnitsWidth(double maxUnitsWidth);
+  void setVisualScale(double visualScale);
+  void setFontDesc(yg::FontDesc const & fontDesc);
+
+  m2::AARectD const boundRect() const;
+  void draw(yg::gl::OverlayRenderer * r, math::Matrix<double, 3, 3> const & m) const;
+
+  void cache(yg::StylesCache * stylesCache);
+};