box.cxx File Reference

Detailed Description

This ROOT 7 example demonstrates how to create a ROOT 7 canvas (RCanvas) and draw ROOT 7 boxes in it (RBox).

It generates a set of boxes using the "normal" coordinates' system.

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#include "ROOT/RCanvas.hxx"
#include "ROOT/RColor.hxx"
#include "ROOT/RBox.hxx"
#include <ROOT/RPadPos.hxx>
 
void box()
{
   using namespace ROOT::Experimental;
 
   // Create a canvas to be displayed.
   auto canvas = RCanvas::Create("Canvas Title");
 
   auto Box1 = canvas->Draw<RBox>(RPadPos(0.1_normal, 0.3_normal), RPadPos(0.3_normal,0.6_normal));
   RColor Color1(255, 0, 0, 0.5); // 50% opaque
   RColor Color2(0, 0, 255, 0.3); // 30% opaque
 
   Box1->AttrBox().AttrBorder().SetColor(Color1).SetWidth(5);
   Box1->AttrBox().AttrFill().SetColor(RColor::kRed);
 
   auto Box2 = canvas->Draw<RBox>(RPadPos(0.4_normal, 0.2_normal), RPadPos(0.6_normal,0.7_normal));
   Box2->AttrBox().AttrBorder().SetColor(Color2).SetStyle(2).SetWidth(3);
   Box2->AttrBox().AttrFill().SetColor(RColor::kGreen);
 
   auto Box3 = canvas->Draw<RBox>(RPadPos(0.7_normal, 0.4_normal), RPadPos(0.9_normal,0.6_normal));
   Box3->AttrBox().AttrBorder().SetWidth(3);
   Box3->AttrBox().AttrFill().SetColor(RColor::kBlue);
 
   auto Box4 = canvas->Draw<RBox>(RPadPos(0.7_normal, 0.7_normal), RPadPos(0.9_normal,0.9_normal));
   //OptsBox4->SetFillStyle(0);
   //OptsBox4->SetRoundWidth(50);
   //OptsBox4->SetRoundHeight(25);
   Box4->AttrBox().AttrBorder().SetWidth(3);
 
   auto Box5 = canvas->Draw<RBox>(RPadPos(0.7_normal, 0.1_normal), RPadPos(0.9_normal,0.3_normal));
   //OptsBox5->SetFillStyle(0);
   //OptsBox5->SetRoundWidth(25);
   //OptsBox5->SetRoundHeight(50);
   Box5->AttrBox().AttrBorder().SetWidth(3);
 
   canvas->Show();
}

Date

2018-10-10

Warning

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

Author

Olivier Couet

Definition in file box.cxx.