mirror of https://github.com/jkriege2/JKQtPlotter.git synced 2024-11-15 18:15:52 +08:00

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jkriege2 b0df7a1fd7 NEW/BREAKING: provide general targets JKQTPlotter5/6::JKQTPlotter5/6, JKQTPlotter5/6::JKQTMathText5/6, ... which are independent of the type of build (shared/static) 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		2024-01-16 13:07:08 +01:00
..
barchart_twocolor.cpp	bugfix	2022-09-11 07:52:19 +02:00
CMakeLists.txt	NEW/BREAKING: provide general targets JKQTPlotter5/6::JKQTPlotter5/6, JKQTPlotter5/6::JKQTMathText5/6, ... which are independent of the type of build (shared/static)	2024-01-16 13:07:08 +01:00
README.md	JKQTPlotter: NEW: barcharts (derived from JKQTPBarGraphBase) can be configured to use different fill styles above and below the baseline	2022-09-10 14:35:16 +02:00

README.md

Example (JKQTPlotter): Barchart With Two-Color Fill-Mode

This project (see barchart_twocolor shows how to draw barcharts, where the bars are filled differently if their value is above or below the baseline.

The source code of the main application is (see barchart_twocolor.cpp:

    // 1. create a plotter window and get a pointer to the internal datastore (for convenience)
    JKQTPlotter plot;
    JKQTPDatastore* ds=plot.getDatastore();

    // 2. now we create two columns for key and value
    size_t columnK=ds->addLinearColumn(10, 0, 2.0*JKQTPSTATISTICS_PI,"k");
    size_t columnV=ds->addColumnCalculatedFromColumn(columnK, &cos, "v");

    // 3. create graph in the plot, which plots the dataset:
    JKQTPBarGraphBase* graph=new JKQTPBarVerticalGraph(&plot);
    graph->setKeyColumn(columnK);
    graph->setValueColumn(columnV);
    // set TwoColor fill Mode
    graph->setFillMode(JKQTPBarGraphBase::FillMode::TwoColorFilling);
    graph->setFillColor(QColor("green"));
    graph->fillStyleBelow().setFillColor(QColor("red"));
    plot.addGraph(graph);

    // 4 autoscale the plot so the graph is contained
    plot.zoomToFit();

    // 5. show plotter and make it a decent size
    plot.setWindowTitle(title);
    plot.show();
    plot.resize(400,400);

The result looks like this:

In order to draw horizontal error bars, you have to use JKQTPBarHorizontalGraph instead of JKQTPBarVerticalGraph: