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Reference Guide
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 <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
// after leaving function scope style will be destroyed, one has to preserve it extra
RDirectory::Heap().Add("custom_style", style);
A position (horizontal and vertical) in a RPad.
Definition: RPadPos.hxx:28
void Show()
Show canvas.
Definition: TCanvas.cxx:2240
virtual void Draw(Option_t *option="")
Default Draw method for all objects.
Definition: TObject.cxx:197
TLine * line
TCanvas * style()
Definition: style.C:1
This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback is welcome!
Iliana Betsou

Definition in file lineRStyle.cxx.