TMathText example
TLatex symbol #tilde, was misplaced.TASImage::DrawtText, TTF::SetTextSize was called with a
rounded value (to pixel). This cause some misplacements of character in TLatex formulae.
TColor *col26 = gROOT->GetColor(26);
col26->SetAlpha(0.01);
A new color can be created transparent the following way:
Int_t ci = 1756;
TColor *color = new TColor(ci, 0.1, 0.2, 0.3, 0.5); // alpha = 0.5
An example of tranparency usage with parallel coordinates can be found
in $ROOTSYS/tutorials/tree/parallelcoordtrans.C
TBox clipping issue. {
{
TMathText l;
l.SetTextAlign(23);
l.SetTextSize(0.06);
l.DrawMathText(0.50, 1.000, "\\prod_{j\\ge0} \\left(\\sum_{k\\ge0} a_{jk}z^k\\right) = \\sum_{n\\ge0} z^n \\left(\\sum_{k_0,k_1,\\ldots\\ge0\\atop k_0+k_1+\\cdots=n} a_{0k_0}a_{1k_1} \\cdots \\right)");
l.DrawMathText(0.50, 0.800, "W_{\\delta_1\\rho_1\\sigma_2}^{3\\beta} = U_{\\delta_1\\rho_1\\sigma_2}^{3\\beta} + {1\\over 8\\pi^2} \\int_{\\alpha_1}^{\\alpha_2} d\\alpha_2^\\prime \\left[ {U_{\\delta_1\\rho_1}^{2\\beta} - \\alpha_2^\\prime U_{\\rho_1\\sigma_2}^{1\\beta} \\over U_{\\rho_1\\sigma_2}^{0\\beta}} \\right]");
l.DrawMathText(0.50, 0.600, "d\\Gamma = {1\\over 2m_A} \\left( \\prod_f {d^3p_f\\over (2\\pi)^3} {1\\over 2E_f} \\right) \\left| \\mathscr{M} \\left(m_A - \\left\\{p_f\\right\\} \\right) \\right|^2 (2\\pi)^4 \\delta^{(4)} \\left(p_A - \\sum p_f \\right)");
l.DrawMathText(0.50, 0.425, "4\\mathrm{Re}\\left\\{{2\\over 1-\\Delta\\alpha} \\chi(s) \\left[ \\^{g}_\\nu^e \\^{g}_\\nu^f (1 + \\cos^2\\theta) + \\^{g}_a^e \\^{g}_a^f \\cos\\theta \\right] \\right\\}");
l.DrawMathText(0.50, 0.330, "p(n) = {1\\over\\pi\\sqrt{2}} \\sum_{k = 1}^\\infty \\sqrt{k} A_k(n) {d\\over dn} {\\sinh \\left\\{ {\\pi\\over k} \\sqrt{2\\over 3} \\sqrt{n - {1\\over 24}} \\right\\} \\over \\sqrt{n - {1\\over 24}}}");
l.DrawMathText(0.13, 0.150, "{(\\ell+1)C_{\\ell}^{TE} \\over 2\\pi}");
l.DrawMathText(0.27, 0.110, "\\mathbb{N} \\subset \\mathbb{R}");
l.DrawMathText(0.63, 0.100, "\\hbox{RHIC スピン物理 Нью-Йорк}");
}
TMathText example
\\frac using \\over.\\mbox as \\hbox to improve the compatibility with TTexDump.SetNDC.SetX1() etc ... for TPave and inherited classes to make sure the
NDC coordinates are also defined.TMathText is a TeX math formulae interpreter. It uses plain
TeX syntax and uses "\" as control instead of "#". If a piece of
text containing "\" is given to TLatex then TMathText
is automatically invoked. Therefore, as histograms' titles, axis titles, labels etc ... are
drawn using TLatex, the TMathText syntax can be used for them also.TTF.cxx since the beginning). With the following code
the spaces between "text" and #lambda were ignored.
TLatex t; t.DrawLatex( 0.1,0.1,"text #Lambda" )
#backslash.DrawLatexNDC.#minus and #plus typographically better than the standard
"-" and "+".TTexDump.#mbox and #hbox to improve the compatibility
between TLatex, TMathText and TTexDump.#minus, #plus, #mp, #hbar
etc ... ignored the color defined by the operator #color.
void divsquare(int w, int h, int n)
{
TCanvas *c = new TCanvas ("c","c",0,0,w,h);
c->DivideSquare(n);
for (int i=1; i<=n; i++) {
c->cd(i);
gPad->DrawFrame(0,0,1,1);
}
}
TGX11 function RequestString. Now the
text appears directly as it will show and it is possible to enter several text string.
The input is not block in the RequestString event loop.TAxis in order to keep the
TAxis class small. Adding two floating point numbers in that class (in fact in TAttAxis)
would have a none negligible effect on the Root files' sizes as there is at least two axis per histogram
and that there is often 1000th histograms in a single file. So we choose to follow the same mechanism as
for the SetMaxDigits static method. The new function is: SetExponentOffset.
Example:
... TGaxis::SetMaxDigits(2); TGaxis::SetExponentOffset(-0.01, 0.01, "y"); // X and Y offset for Y axis TGaxis::SetExponentOffset(-0.05, 0.01, "x"); // Y and Y offset for X axis ... hist->Draw();
TGaxis::SetMaxDigits() was not acitve on standalone TGaxis.This class allow to generate PGF/TikZ vector graphics output which
can be included in TeX and LaTeX documents.
PGF is a TeX macro package for generating graphics. It is platform and
format-independent and works together with the most important TeX backend drivers,
including pdftex and dvips. It comes with a user-friedly syntax layer called TikZ.
To generate a such file it is enough to do:
gStyle->SetPaperSize(10.,10.);
hpx->Draw();
gPad->Print("hpx.tex");Then, the generated file (hpx.tex) can be included in a LaTeX document
(simple.tex) in the following way:
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{patterns}
\title{A simple LaTeX example}
\date{July 2013}
\begin{document}
\maketitle
The following image as been generated using the TTeXDump class:
\par
\input{hpx.tex}
\end{document}Note the two directive needed at the top of the LaTeX file:
\usepackage{tikz}
\usetikzlibrary{patterns}Then including the picture in the document is done with the
\input directive.
The command pdflatex simple.tex will generate the corresponding
pdf file simple.pdf.
Rotated.cxx had a side effect on rotated text drawn with X11 fonts.TGCocoa/TGQuartz classes are the implementation of TVirtualX based on Cocoa and Quartz 2D. They let to use ROOT's GUI and graphics on MacOS X without installing X11.app and also give an access to Apple's native graphics and GUI frameworks. Window management, event loop, event dispatching, etc. are implemented on top of Cocoa. Graphics (GUI rendering and non-GUI) is done by Quartz 2D (Core Grapchis). An example of a TCanvas with a THStack object, transparency, anti-aliasing, gradient fill, shadows:
