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Diffstat (limited to 'src/charts/doc/src/examples-pointsselectionandmarkers.qdoc')
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diff --git a/src/charts/doc/src/examples-pointsselectionandmarkers.qdoc b/src/charts/doc/src/examples-pointsselectionandmarkers.qdoc new file mode 100644 index 00000000..c3fe2e84 --- /dev/null +++ b/src/charts/doc/src/examples-pointsselectionandmarkers.qdoc @@ -0,0 +1,76 @@ +/**************************************************************************** +** +** Copyright (C) 2021 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:FDL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Free Documentation License Usage +** Alternatively, this file may be used under the terms of the GNU Free +** Documentation License version 1.3 as published by the Free Software +** Foundation and appearing in the file included in the packaging of +** this file. Please review the following information to ensure +** the GNU Free Documentation License version 1.3 requirements +** will be met: https://www.gnu.org/licenses/fdl-1.3.html. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/*! + \example pointsselectionandmarkers + \title Light Markers Points Selection Example + \ingroup qtcharts_examples + + \brief The example shows a usage of light markers + and points selection for the series. + + \image examples_pointsselectionandmarkers1.png + \image examples_pointsselectionandmarkers2.png + + \include examples-run.qdocinc + + \section1 Light Markers Feature + + We start with creating a series, filling it with the data, and setting up selection funcionality. + It's important not to set points visibility to \c true, because light markers functionality is + an independent feature and setting both would result in undesired behavior. + \snippet pointsselectionandmarkers/main.cpp 1 + + Then we create the \c {QChart}, the \c {QChartview} and the control widget with its layout to arrange customization elements. + \snippet pointsselectionandmarkers/main.cpp 2 + + The next step is creating elements of customization. + \snippet pointsselectionandmarkers/main.cpp 3 + + We create the label for the marker selection combobox and add fill the combobox with the items. + Also, we provide functionality to the combobox. Considering the implementation of the light markers + functionality, we need to make sure if displaying of unselected points is checked. + Switching the visibility of the light marker off is achieved by setting it to \c "empty" \c {QImage}. + If the user unchecks the displaying of unselected points and changes the light marker image, unselected points + have to remain invisible. + If checking isn't performed, new \c {QImage} will be set for light marker + and unselected points will be visible even though it has been switched off. + \snippet pointsselectionandmarkers/main.cpp 4 + + Almost the same procedure applies to the selected point light marker and line color. The only difference is + that there's no need to check visibility of unselected points as it doesn't affect the functionality. + \snippet pointsselectionandmarkers/main.cpp 5 + + A small difference comes with changing visibility of unselected points. As it was mentioned before, + making light markers invisible is achieved by setting them to "empty" \c {QImage}. + That is why, depending on checkbox state, selected point light marker is set to "empty" \c {QImage} or + to the light marker extracted from the current index of the corresponding combobox. + \snippet pointsselectionandmarkers/main.cpp 6 + + The final part is to arrange the elements, add all the widgets to the main widget, and set the main window size. + \snippet pointsselectionandmarkers/main.cpp 7 +*/ |