lineRStyle.cxx File Reference

Detailed Description

This ROOT 7 example demonstrates how to customize RLine object using RStyle "normal" coordinates' system.

 
#include "ROOT/RCanvas.hxx"
#include "ROOT/RText.hxx"
#include "ROOT/RLine.hxx"
#include "ROOT/RDirectory.hxx"
#include <string>
 
using namespace ROOT::Experimental;
 
void lineRStyle()
{
   auto canvas = RCanvas::Create("Canvas Title");
   double num = 0.3;
 
   for (int i=10; i>0; i--){
      num = num + 0.05;
 
      canvas->Draw<RText>(std::to_string(i))->SetPos({.3_normal, 1_normal*num}).AttrText().SetSize(13).SetAlign(32).SetFont(52);
 
      auto line = canvas->Draw<RLine>(RPadPos(.32_normal,1_normal*num), RPadPos(.8_normal, 1_normal*num));
 
      line->SetId(std::string("obj") + std::to_string(i));
      line->SetCssClass(std::string("user_class_") + std::to_string(i % 3));
 
   }
 
   auto style = std::make_shared<RStyle>();
 
   style->AddBlock(".user_class_1").AddInt("line_style", 4); // all lines with user_class_1 should get style 1
   style->AddBlock(".user_class_2").AddDouble("line_width", 5.); // all lines with user_class_2 should get line width 5
   style->AddBlock("#obj7").AddString("line_color_rgb", "0000FF"); // line with id obj7 should be red
 
   style->AddBlock("line").AddString("line_color_rgb", "FF0000"); // all lines should get red color
 
   canvas->UseStyle(style);
 
   canvas->Show();
 
   // after leaving function scope style will be destroyed, one has to preserve it extra
   RDirectory::Heap().Add("custom_style", style);
}

Date

2019-10-04

Warning

This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback is welcome!

Author

Iliana Betsou

Definition in file lineRStyle.cxx.