public MyCanvas(String formulaStr) {
this.g2 = new FXGraphics2D(getGraphicsContext2D());
this.g2.scale(20, 20);
// create a formula
TeXFormula formula = new TeXFormula(formulaStr);
TeXFormula f1 = new TeXFormula();
f1.setLaTeX(formulaStr);
TeXIcon icon = f1.createTeXIcon(TeXConstants.STYLE_SCRIPT, 1000);
// the 'Box' seems to be the thing we can draw directly to Graphics2D
this.box = icon.getBox();
// Redraw canvas when size changes.
widthProperty().addListener(evt -> draw());
heightProperty().addListener(evt -> draw());
}
public EPLLatexTab(final EncogProgram prg) {
super(null);
try {
RenderLatexExpression render = new RenderLatexExpression();
String latex = render.render(prg);
try {
TeXFormula formula = new TeXFormula(latex);
TeXIcon icon = formula.createTeXIcon(TeXConstants.STYLE_DISPLAY, 20);
icon.setInsets(new Insets(5, 5, 5, 5));
this.image =
new BufferedImage(
icon.getIconWidth(), icon.getIconHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = image.createGraphics();
g2.setColor(Color.white);
g2.fillRect(0, 0, icon.getIconWidth(), icon.getIconHeight());
JLabel jl = new JLabel();
jl.setForeground(new Color(0, 0, 0));
icon.paintIcon(jl, g2, 0, 0);
} catch (Exception ex) {
throw new UnsupportedOperationException(
"Can't parse LATEX: " + latex + "\nFrom: " + prg.toString(), ex);
}
} catch (Exception ex) {
EncogWorkBench.displayError("Error", ex);
}
}
public static void main(String[] args) throws FileNotFoundException {
TeXFormula.addPredefinedCommands(new FileInputStream("Package_Foo.xml"));
String latex = "\\begin{array}{l}";
latex += "\\fooA{\\pi}{C}\\\\";
latex += "\\mbox{A red circle }\\fooB{75.3}\\\\";
latex += "\\mbox{A red disk }\\fooC[abc]{126.7}\\\\";
latex += "\\mbox{An other red circle }\\fooD{159.81}[ab]";
latex += "\\end{array}";
TeXFormula formula = new TeXFormula(latex);
TeXIcon icon = formula.createTeXIcon(TeXConstants.STYLE_DISPLAY, 20);
icon.setInsets(new Insets(5, 5, 5, 5));
BufferedImage image =
new BufferedImage(icon.getIconWidth(), icon.getIconHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = image.createGraphics();
g2.setColor(Color.white);
g2.fillRect(0, 0, icon.getIconWidth(), icon.getIconHeight());
JLabel jl = new JLabel();
jl.setForeground(new Color(0, 0, 0));
icon.paintIcon(jl, g2, 0, 0);
File file = new File("Example.png");
try {
ImageIO.write(image, "png", file.getAbsoluteFile());
} catch (IOException ex) {
}
}
public static void main(String[] args) {
String latex = "\\definecolor{gris}{gray}{0.9}";
latex += "\\definecolor{bleu}{rgb}{0,0,1}\\newcommand{\\pa}{\\left|}";
latex += "\\begin{array}{c}";
latex += "\\JLaTeXMath\\\\";
latex += "\\begin{split}";
latex += " &Тепловой\\ поток\\ \\mathrm{Тепловой\\ поток}\\ \\mathtt{Тепловой\\ поток}\\\\";
latex += " &\\boldsymbol{\\mathrm{Тепловой\\ поток}}\\ \\mathsf{Тепловой\\ поток}\\\\";
latex +=
"|I_2| &= \\pa\\int_0^T\\psi(t)\\left\\{ u(a,t)-\\int_{\\gamma(t)}^a \\frac{d\\theta}{k} (\\theta,t) \\int_a^\\theta c(\\xi) u_t (\\xi,t)\\,d\\xi\\right\\}dt\\right|\\\\";
latex +=
"&\\le C_6 \\Bigg|\\pa f \\int_\\Omega \\pa\\widetilde{S}^{-1,0}_{a,-} W_2(\\Omega, \\Gamma_1)\\right|\\ \\right|\\left| |u|\\overset{\\circ}{\\to} W_2^{\\widetilde{A}}(\\Omega;\\Gamma_r,T)\\right|\\Bigg|\\\\";
latex += "&\\\\";
latex +=
"&\\textcolor{magenta}{\\mathrm{Produit\\ avec\\ Java\\ et\\ \\LaTeX\\ par\\ }\\mathscr{C}\\mathcal{A}\\mathfrak{L}\\mathbf{I}\\mathtt{X}\\mathbb{T}\\mathsf{E}}\\\\";
latex +=
"&\\begin{pmatrix}\\alpha&\\beta&\\gamma&\\delta\\\\\\aleph&\\beth&\\gimel&\\daleth\\\\\\mathfrak{A}&\\mathfrak{B}&\\mathfrak{C}&\\mathfrak{D}\\\\\\boldsymbol{\\mathfrak{a}}&\\boldsymbol{\\mathfrak{b}}&\\boldsymbol{\\mathfrak{c}}&\\boldsymbol{\\mathfrak{d}}\\end{pmatrix}\\quad{(a+b)}^{\\frac{n}{2}}=\\sqrt{\\sum_{k=0}^n\\tbinom{n}{k}a^kb^{n-k}}\\quad \\Biggl(\\biggl(\\Bigl(\\bigl(()\\bigr)\\Bigr)\\biggr)\\Biggr)\\\\";
latex +=
"&\\forall\\varepsilon\\in\\mathbb{R}_+^*\\ \\exists\\eta>0\\ |x-x_0|\\leq\\eta\\Longrightarrow|f(x)-f(x_0)|\\leq\\varepsilon\\\\";
latex +=
"&\\det\\begin{bmatrix}a_{11}&a_{12}&\\cdots&a_{1n}\\\\a_{21}&\\ddots&&\\vdots\\\\\\vdots&&\\ddots&\\vdots\\\\a_{n1}&\\cdots&\\cdots&a_{nn}\\end{bmatrix}\\overset{\\mathrm{def}}{=}\\sum_{\\sigma\\in\\mathfrak{S}_n}\\varepsilon(\\sigma)\\prod_{k=1}^n a_{k\\sigma(k)}\\\\";
latex +=
"&\\Delta f(x,y)=\\frac{\\partial^2f}{\\partial x^2}+\\frac{\\partial^2f}{\\partial y^2}\\qquad\\qquad \\fcolorbox{noir}{gris}{n!\\underset{n\\rightarrow+\\infty}{\\sim} {\\left(\\frac{n}{e}\\right)}^n\\sqrt{2\\pi n}}\\\\";
latex +=
"&\\sideset{_\\alpha^\\beta}{_\\gamma^\\delta}{\\begin{pmatrix}a&b\\\\c&d\\end{pmatrix}}\\xrightarrow[T]{n\\pm i-j}\\sideset{^t}{}A\\xleftarrow{\\overrightarrow{u}\\wedge\\overrightarrow{v}}\\underleftrightarrow{\\iint_{\\mathds{R}^2}e^{-\\left(x^2+y^2\\right)}\\,\\mathrm{d}x\\mathrm{d}y}";
latex += "\\end{split}\\\\";
latex +=
"\\rotatebox{30}{\\sum_{n=1}^{+\\infty}}\\quad\\mbox{Mirror rorriM}\\reflectbox{\\mbox{Mirror rorriM}}";
latex += "\\end{array}";
TeXFormula formula = new TeXFormula(latex);
TeXIcon icon = formula.createTeXIcon(TeXConstants.STYLE_DISPLAY, 20);
icon.setInsets(new Insets(5, 5, 5, 5));
BufferedImage image =
new BufferedImage(icon.getIconWidth(), icon.getIconHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = image.createGraphics();
g2.setColor(Color.white);
g2.fillRect(0, 0, icon.getIconWidth(), icon.getIconHeight());
JLabel jl = new JLabel();
jl.setForeground(new Color(0, 0, 0));
icon.paintIcon(jl, g2, 0, 0);
File file = new File("Example3.png");
try {
ImageIO.write(image, "png", file.getAbsoluteFile());
} catch (IOException ex) {
}
}
/**
* Renders LaTeX equation using JLaTeXMath
*
* @param app
* @param g2
* @param x
* @param y
* @param text
* @param font
* @param serif
* @param fgColor
* @param bgColor
* @return dimension of rendered equation
*/
public final FormulaDimension drawEquationJLaTeXMath(
Application app,
GeoElement geo,
Graphics2D g2,
int x,
int y,
String text,
Font font,
boolean serif,
Color fgColor,
Color bgColor,
boolean useCache,
Integer maxWidth,
Float lineSpace) {
// TODO uncomment when \- works
// text=addPossibleBreaks(text);
int width = -1;
int height = -1;
int depth = 0;
if (drawEquationJLaTeXMathFirstCall) { // first call
drawEquationJLaTeXMathFirstCall = false;
// initialise definitions
if (initJLaTeXMath == null)
initJLaTeXMath =
new TeXFormula(
"\\DeclareMathOperator{\\sech}{sech} \\DeclareMathOperator{\\csch}{csch} \\DeclareMathOperator{\\erf}{erf}");
// make sure cache doesn't get too big
JLaTeXMathCache.setMaxCachedObjects(100);
Iterator<String> it = Unicode.getCharMapIterator();
while (it.hasNext()) {
String lang = it.next();
Character ch = Unicode.getTestChar(lang);
Font testFont = app.getFontCanDisplay(ch.toString(), true, Font.PLAIN, 12);
if (testFont != null)
TeXFormula.registerExternalFont(Character.UnicodeBlock.of(ch), testFont.getFontName());
// Application.debug("LaTeX font registering: "+lang+" "+testFont.getFontName());
}
// Arabic is in standard Java fonts, so we don't need to search for a font
TeXFormula.registerExternalFont(Character.UnicodeBlock.of('\u0681'), "Sans Serif", "Serif");
try {
WebStartAlphabetRegistration.register(AlphabetRegistration.JLM_GREEK);
WebStartAlphabetRegistration.register(AlphabetRegistration.JLM_CYRILLIC);
// URLAlphabetRegistration.register(new URL(app.getCodeBase()+"jlm_greek.jar"),
// "greek",URLAlphabetRegistration.JLM_GREEK);
// URLAlphabetRegistration.register(new URL(app.getCodeBase()+"jlm_cyrillic.jar"),
// "cyrillic",URLAlphabetRegistration.JLM_CYRILLIC);
} catch (Exception e) {
e.printStackTrace();
}
LatexConvertorFactory factory = new LatexConvertorFactory(app.getKernel());
DynamicAtom.setExternalConverterFactory(factory);
}
int style = 0;
if (font.isBold()) style = style | TeXFormula.BOLD;
if (font.isItalic()) style = style | TeXFormula.ITALIC;
if (!serif) style = style | TeXFormula.SANSSERIF;
// if we're exporting, we want to draw it full resolution
// if it's a \jlmDynamic text, we don't want to add it to the cache
if (app.exporting || text.indexOf("\\jlmDynamic") > -1 || !useCache) {
// Application.debug("creating new icon for: "+text);
TeXFormula formula;
TeXIcon icon;
try {
formula = new TeXFormula(text);
if (maxWidth == null)
icon =
formula.createTeXIcon(TeXConstants.STYLE_DISPLAY, font.getSize() + 3, style, fgColor);
else
icon =
formula.createTeXIcon(
TeXConstants.STYLE_DISPLAY,
font.getSize() + 3,
TeXConstants.UNIT_CM,
maxWidth.intValue(),
TeXConstants.ALIGN_LEFT,
TeXConstants.UNIT_CM,
lineSpace.floatValue());
} catch (MyError e) {
// e.printStackTrace();
// Application.debug("MyError LaTeX parse exception: "+e.getMessage()+"\n"+text);
// Write error message to Graphics View
formula = TeXFormula.getPartialTeXFormula(text);
icon =
formula.createTeXIcon(TeXConstants.STYLE_DISPLAY, font.getSize() + 3, style, fgColor);
formula.createTeXIcon(
TeXConstants.STYLE_DISPLAY,
15,
TeXConstants.UNIT_CM,
4f,
TeXConstants.ALIGN_LEFT,
TeXConstants.UNIT_CM,
0.5f);
// Rectangle rec = drawMultiLineText(e.getMessage()+"\n"+text, x, y +
// g2.getFont().getSize(), g2);
// return new Dimension(rec.width, rec.height);
} catch (Exception e) {
// e.printStackTrace();
// Application.debug("LaTeX parse exception: "+e.getMessage()+"\n"+text);
// Write error message to Graphics View
formula = TeXFormula.getPartialTeXFormula(text);
icon =
formula.createTeXIcon(TeXConstants.STYLE_DISPLAY, font.getSize() + 3, style, fgColor);
// Rectangle rec = drawMultiLineText(e.getMessage()+"\n"+text, x, y +
// g2.getFont().getSize(), g2);
// return new Dimension(rec.width, rec.height);
}
icon.setInsets(new Insets(1, 1, 1, 1));
jl.setForeground(fgColor);
icon.paintIcon(jl, g2, x, y);
return new FormulaDimension(icon.getIconWidth(), icon.getIconHeight(), icon.getIconDepth());
}
Object key = null;
Image im = null;
try {
// if geoText != null then keep track of which key goes with the GeoText
// so that we can remove it from the cache if it changes
// eg for a (regular) dynamic LaTeX text eg "\sqrt{"+a+"}"
if (geo == null)
key =
JLaTeXMathCache.getCachedTeXFormula(
text,
TeXConstants.STYLE_DISPLAY,
style,
font.getSize() + 3 /*font size*/,
1 /* inset around the label*/,
fgColor);
else key = geo.getLaTeXCache().getCachedLaTeXKey(text, font.getSize() + 3, style, fgColor);
im = JLaTeXMathCache.getCachedTeXFormulaImage(key);
int ret[] = JLaTeXMathCache.getCachedTeXFormulaDimensions(key);
width = ret[0];
height = ret[1];
depth = ret[2];
} catch (Exception e) {
// Application.debug("LaTeX parse exception: "+e.getMessage()+"\n"+text);
// Write error message to Graphics View
TeXFormula formula = TeXFormula.getPartialTeXFormula(text);
im =
formula.createBufferedImage(
TeXConstants.STYLE_DISPLAY, font.getSize() + 3, Color.black, Color.white);
// Rectangle rec = drawMultiLineText(e.getMessage()+"\n"+text, x, y + g2.getFont().getSize(),
// g2);
// return new Dimension(rec.width, rec.height);
}
g2.drawImage(im, x, y, null);
if (width == -1) {
width = im.getWidth(null);
}
if (height == -1) {
height = im.getHeight(null);
}
return new FormulaDimension(width, height, depth);
}
