mirror of
https://github.com/jkriege2/JKQtPlotter.git
synced 2024-12-26 10:31:39 +08:00
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}
|
|
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.
|
|
|
|
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).
|
|
|
|
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):
|
|
```.cpp
|
|
#include <QApplication>
|
|
#include <QLabel>
|
|
#include <QPixmap>
|
|
#include "jkqtmathtext/jkqtmathtextlabel.h"
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
QApplication app(argc, argv);
|
|
|
|
// we use a simple label to display the math text
|
|
QLabel lab;
|
|
|
|
// 1. we will paint into a QPixmap
|
|
QPixmap pix(600,400);
|
|
pix.fill(QColor("white"));
|
|
QPainter painter;
|
|
|
|
// 2. now we create a JKQTMathText object.
|
|
// Also we configure the JKQTMathText to use the XITS fonts that
|
|
// were included in the *.pro-file
|
|
JKQTMathText mathText;
|
|
mathText.useXITS();
|
|
mathText.setFontSize(20);
|
|
|
|
// 3. now we parse some LaTeX code (the Schroedinger's equation), so
|
|
// we can draw it onto the QPixmap in the next step
|
|
mathText.parse("$\\left[-\\frac{\\hbar^2}{2m}\\frac{\\partial^2}{\\partial x^2}+V(x)\\right]\\Psi(x)=\\mathrm{i}\\hbar\\frac{\\partial}{\\partial t}\\Psi(x)$");
|
|
|
|
// 3. here we do the painting
|
|
painter.begin(&pix);
|
|
mathText.draw(painter, Qt::AlignCenter, QRectF(0,0,pix.width(), pix.height()), false);
|
|
painter.end();
|
|
|
|
// now we display and resize the label as a window
|
|
lab.setPixmap(pix);
|
|
lab.show();
|
|
lab.resize(600,400);
|
|
|
|
return app.exec();
|
|
}
|
|
```
|
|
The result looks like this:
|
|
|
|
|
|
|