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https://github.com/jkriege2/JKQtPlotter.git
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b0df7a1fd7
NEW/BREAKING: refactor CMake-Code, so static/dynamic switch is done via <code>BUILD_SHARED_LIBS</code>, which retires <code>JKQtPlotter_BUILD_STATIC_LIBS</code>, <code>JKQtPlotter_BUILD_SHARED_LIBS</code> and removes the capability to build static and shared libraries in one location (fixes issue #104) NEW: prepareed library for CMake's <a href="https://cmake.org/cmake/help/latest/module/FetchContent.html">FetchContent</a>-API NEW: the different sub-libraries JKQTPlotter, JKQTFastPlotter (DEPRECATED), JKQTMath, JKQTMathText can be activated/deactivated with CMake options JKQtPlotter_BUILD_LIB_JKQTPLOTTER, JKQtPlotter_BUILD_LIB_JKQTFASTPLOTTER, JKQtPlotter_BUILD_LIB_JKQTMATHTEXT, JKQtPlotter_BUILD_LIB_JKQTMATH
53 lines
2.0 KiB
Markdown
53 lines
2.0 KiB
Markdown
# Example (JKQTMathText): A simple usage example {#JKQTMathTextSimpleExample}
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JKQTMathText is a hand-written LaTeX-renderer for Qt (implemented in native C++, using Qt). It supports a large set of standard LaTeX markup and can render it to a QPainter.
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This project (see `./examples/jkqtmathtext_simpletest/`) simply creates a QLabel (as a new window) that displays a rendered LaTeX equation (here the time-dependent Schrödinger equation).
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The source code of the main application is (see [`jkqtmathtext_simpletest.cpp`](https://github.com/jkriege2/JKQtPlotter/tree/master/examples/jkqtmathtext_simpletest/jkqtmathtext_simpletest.cpp):
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```.cpp
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#include <QApplication>
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#include <QLabel>
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#include <QPixmap>
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#include "jkqtmathtext/jkqtmathtextlabel.h"
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int main(int argc, char* argv[])
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{
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QApplication app(argc, argv);
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// we use a simple label to display the math text
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QLabel lab;
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// 1. we will paint into a QPixmap
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QPixmap pix(600,400);
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pix.fill(QColor("white"));
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QPainter painter;
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// 2. now we create a JKQTMathText object.
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// Also we configure the JKQTMathText to use the XITS fonts that
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// were included in the *.pro-file
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JKQTMathText mathText;
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mathText.useXITS();
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mathText.setFontSize(20);
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// 3. now we parse some LaTeX code (the Schroedinger's equation), so
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// we can draw it onto the QPixmap in the next step
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mathText.parse("$\\left[-\\frac{\\hbar^2}{2m}\\frac{\\partial^2}{\\partial x^2}+V(x)\\right]\\Psi(x)=\\mathrm{i}\\hbar\\frac{\\partial}{\\partial t}\\Psi(x)$");
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// 3. here we do the painting
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painter.begin(&pix);
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mathText.draw(painter, Qt::AlignCenter, QRectF(0,0,pix.width(), pix.height()), false);
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painter.end();
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// now we display and resize the label as a window
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lab.setPixmap(pix);
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lab.show();
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lab.resize(600,400);
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return app.exec();
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}
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```
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The result looks like this:
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