rpave.cxx

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/// \file
/// \ingroup tutorial_rcanvas
///
/// This macro draw different variants of RPave on the RCanvas.
/// Also usage of custom font is demonstrated.
///
/// \macro_image (rcanvas_js)
/// \macro_code
///
/// \date 2020-06-18
/// \warning This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback
/// is welcome!
/// \author Sergey Linev <s.linev@gsi.de>
 
/*************************************************************************
 * Copyright (C) 1995-2021, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#include "ROOT/RCanvas.hxx"
#include "ROOT/RPave.hxx"
#include "ROOT/RPaveText.hxx"
#include "ROOT/RFont.hxx"
 
using namespace ROOT::Experimental;
 
void rpave()
{
   // Create a canvas to be displayed.
   auto canvas = RCanvas::Create("RPave example");
 
   // this pave should be in top left corner
   auto pave = canvas->Draw<RPave>();
   pave->fill.color = RColor::kBlue;
   pave->fill.style = RAttrFill::k3001;
   pave->border.color = RColor::kGreen;
   pave->border.width = 3;
   pave->corner = RPave::kTopLeft;
   pave->offsetX = pave->offsetY = 0.05_normal;
   pave->width = 0.3_normal;
   pave->height = 0.3_normal;
 
   // this second pave in the bottom left corner
   auto pave2 = canvas->Draw<RPave>();
   pave2->fill.color = RColor::kRed;
   pave2->fill.style = RAttrFill::k3002;
   pave2->corner = RPave::kBottomLeft;
   pave2->offsetX = pave2->offsetY = 0.05_normal;
   pave2->width = 0.3_normal;
   pave2->height = 0.3_normal;
 
   auto text = canvas->Draw<RPaveText>();
   text->AddLine("This is RPaveText");
   text->AddLine("It can have several lines");
   text->AddLine("It should be in top right corner");
   text->fill.color = RColor::kYellow;
   text->fill.style = RAttrFill::k3003;
   text->corner = RPave::kTopRight;
   text->offsetX = text->offsetY = 0.05_normal;
   text->width = 0.4_normal;
   text->height = 0.3_normal;
 
   std::string fname = __FILE__;
   auto pos = fname.find("rpave.cxx");
   if (pos > 0) {
      fname.resize(pos);
      fname.append("comic.woff2");
   } else
      fname = "comic.woff2";
   canvas->Draw<RFont>("CustomFont", fname);
 
   auto text2 = canvas->Draw<RPaveText>();
   text2->AddLine("RPaveText with custom font");
   text2->AddLine("It loaded from comic.woff2 file");
   text2->AddLine("One also can provide valid URL");
   text2->fill.color = RColor::kGreen;
   text2->fill.style = RAttrFill::k3004;
   text2->corner = RPave::kBottomRight;
   text2->offsetX = text2->offsetY = 0.05_normal;
   text2->width = 0.4_normal;
   text2->height = 0.3_normal;
   text2->text.font.family = "CustomFont";
 
   canvas->SetSize(1000, 700);
   canvas->Show();
}