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modified example a bit

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jkriege2 2018-11-29 22:06:58 +01:00
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screenshots/jkqtplotter_simpletest_symbols_and_styles.png
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test/jkqtplotter_simpletest_symbols_and_styles/README.md
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@ -5,7 +5,7 @@
## Line Graph with Different Symbols and Line Styles
This project (see `./test/jkqtplotter_simpletest_symbols_and_styles/`) simply creates a JKQtPlotter widget (as a new window) and adds a single line-graph (a sine-wave). Data is initialized from two QVector<double> objects.
The source code of the main application can be found in [`jkqtplotter_simpletest_symbols_and_styles.cpp`](https://github.com/jkriege2/JKQtPlotter/blob/master/jkqtplotter_simpletest_symbols_and_styles/jkqtplotter_simpletest_symbols_and_styles.cpp). Mainly several graphs are generated in a loop and then different symbol and line styles are applied to the graph (set by `graph->set_symbol()` for the symbol and `graph->set_style()` for the line style). The colors are set automtically from an internal default palette. The main loop looks like this:
The source code of the main application can be found in [`jkqtplotter_simpletest_symbols_and_styles.cpp`](https://github.com/jkriege2/JKQtPlotter/blob/master/test/jkqtplotter_simpletest_symbols_and_styles/jkqtplotter_simpletest_symbols_and_styles.cpp). Mainly several graphs are generated in a loop and then different symbol and line styles are applied to the graph (set by `graph->set_symbol()` for the symbol and `graph->set_style()` for the line style). The colors are set automtically from an internal default palette. The main loop looks like this:
```c++
QVector<Qt::PenStyle> pens {Qt::NoPen, Qt::SolidLine, Qt::DashLine, Qt::DotLine, Qt::DashDotLine, Qt::DashDotDotLine };
@ -26,7 +26,13 @@ The source code of the main application can be found in [`jkqtplotter_simpletes
// set symbol + pen style and color
graph->set_symbol(static_cast<JKQTPgraphSymbols>(symbolID));
graph->set_style(pens[ipen]);
// set symbol size
graph->set_symbolSize(14);
// set width of symbol lines
graph->set_symbolWidth(1.5);
// set width of graph line
graph->set_lineWidth(1);
// graph title is made from symbol+penstyle
graph->set_title(JKQTPgraphSymbols2NameString(static_cast<JKQTPgraphSymbols>(graph->get_symbol()))+QString(", ")+JKQTP_QPenStyle2String(graph->get_style()));
@ -38,6 +44,7 @@ The source code of the main application can be found in [`jkqtplotter_simpletes
}
```
In addition to the symbol type and line style, you can also alter the size of the symbols (`graph->set_symbolSize(14)`), the line-width used to draw them (`graph->set_symbolWidth(1.5)`) and the line width of the graph line (`graph->set_lineWidth(1)`). If you want to switch off the line altogether, use `graph->set_drawLine(false`.
The result looks like this:

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test/jkqtplotter_simpletest_symbols_and_styles/jkqtplotter_simpletest_symbols_and_styles.cpp
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@ -25,7 +25,7 @@ int main(int argc, char* argv[])
// 3. now we make several plots with different symbol styles and line-styles
// for that we iterate over every symbol style and at the same time over
// pen styles from the vector pens
QVector<Qt::PenStyle> pens {Qt::NoPen, Qt::SolidLine, Qt::DashLine, Qt::DotLine, Qt::DashDotLine, Qt::DashDotDotLine };
QVector<Qt::PenStyle> pens {Qt::SolidLine, Qt::DashLine, Qt::DotLine, Qt::DashDotLine, Qt::DashDotDotLine };
int ipen=0;
for (int symbolID=0; symbolID<=JKQTPmaxSymbolID; symbolID++) {
// generate some plot data
@ -43,9 +43,18 @@ int main(int argc, char* argv[])
// set symbol + pen style and color
graph->set_symbol(static_cast<JKQTPgraphSymbols>(symbolID));
graph->set_style(pens[ipen]);
QString lname=JKQTP_QPenStyle2String(graph->get_style());
graph->set_drawLine(static_cast<JKQTPgraphSymbols>(symbolID)!=JKQTPdot);
if (!graph->get_drawLine()) lname="";
// set symbol size
graph->set_symbolSize(14);
// set width of symbol lines
graph->set_symbolWidth(1.5);
// set width of graph line
graph->set_lineWidth(1);
// graph title is made from symbol+penstyle
graph->set_title(JKQTPgraphSymbols2NameString(static_cast<JKQTPgraphSymbols>(graph->get_symbol()))+QString(", ")+JKQTP_QPenStyle2String(graph->get_style()));
graph->set_title(JKQTPgraphSymbols2NameString(static_cast<JKQTPgraphSymbols>(graph->get_symbol()))+QString(", ")+lname);
// add the graph to the plot, so it is actually displayed
plot.addGraph(graph);