mirror of
https://github.com/jkriege2/JKQtPlotter.git
synced 2024-11-16 02:25:50 +08:00
72 lines
2.6 KiB
Markdown
72 lines
2.6 KiB
Markdown
[Back to JKQTPlotter main page](https://github.com/jkriege2/JKQtPlotter/)
|
|
|
|
# JKQtPlotter
|
|
|
|
## JKQTmathText
|
|
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.
|
|
## A simple usage example
|
|
This project (see `./test/jkqtmathtext_simpletest/`) simply creates a QLabel (as a new window) that displays a rendered LaTeX equation (here the time-dependent Schrödinger equation).
|
|
The QMake project looks like this (see `./test/jkqtmathtext_simpletest/jkqtmathtext_simpletest.pro`):
|
|
```qmake
|
|
# include JKQTmathText source-code, including the open-source XITS fonts
|
|
include(../../lib/jkqtmathtext_with_xits.pri)
|
|
SOURCES += jkqtmathtext_simpletest.cpp
|
|
|
|
# if you don't want to use the XITS fonts, use this line (and uncomment the
|
|
# last two line!):
|
|
#include(../../lib/jkqtmathtext.pri)
|
|
|
|
CONFIG += qt
|
|
QT += core gui
|
|
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets printsupport
|
|
|
|
TARGET = jkqtmathtext_simpletest
|
|
```
|
|
And the soruce code of the main application is (see `./test/jkqtmathtext_simpletest/jkqtmathtext_simpletest.cpp`):
|
|
```c++
|
|
#include <QApplication>
|
|
#include <QLabel>
|
|
#include <QPixmap>
|
|
#include "jkqtmathtext/jkqtmathtext.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.set_fontSize(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:
|
|
|
|
|
|
|
|
[Back to JKQTPlotter main page](https://github.com/jkriege2/JKQtPlotter/) |