pentool.cpp Example File | Qt Charts 5.12.9

- Qt 5.12
- Qt Charts
- Pie Chart Customization Example
- pentool.cpp Example File
- Qt Charts | Commercial or GPLv3

# pentool.cpp Example File

piechartcustomization/pentool.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2016 The Qt Company Ltd.
     ** Contact: https://www.qt.io/licensing/
     **
     ** This file is part of the Qt Charts module of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:GPL$
     ** 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 General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3 or (at your option) any later version
     ** approved by the KDE Free Qt Foundation. The licenses are as published by
     ** the Free Software Foundation and appearing in the file LICENSE.GPL3
     ** included in the packaging of this file. Please review the following
     ** information to ensure the GNU General Public License requirements will
     ** be met: https://www.gnu.org/licenses/gpl-3.0.html.
     **
     ** $QT_END_LICENSE$
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     ****************************************************************************/

     #include "pentool.h"
     #include <QtWidgets/QPushButton>
     #include <QtWidgets/QDoubleSpinBox>
     #include <QtWidgets/QComboBox>
     #include <QtWidgets/QFormLayout>
     #include <QtWidgets/QColorDialog>

     PenTool::PenTool(QString title, QWidget *parent)
         : QWidget(parent)
     {
         setWindowTitle(title);
         setWindowFlags(Qt::Tool);

         m_colorButton = new QPushButton();

         m_widthSpinBox = new QDoubleSpinBox();

         m_styleCombo = new QComboBox();
         m_styleCombo->addItem("NoPen");
         m_styleCombo->addItem("SolidLine");
         m_styleCombo->addItem("DashLine");
         m_styleCombo->addItem("DotLine");
         m_styleCombo->addItem("DashDotLine");
         m_styleCombo->addItem("DashDotDotLine");

         m_capStyleCombo = new QComboBox();
         m_capStyleCombo->addItem("FlatCap", Qt::FlatCap);
         m_capStyleCombo->addItem("SquareCap", Qt::SquareCap);
         m_capStyleCombo->addItem("RoundCap", Qt::RoundCap);

         m_joinStyleCombo = new QComboBox();
         m_joinStyleCombo->addItem("MiterJoin", Qt::MiterJoin);
         m_joinStyleCombo->addItem("BevelJoin", Qt::BevelJoin);
         m_joinStyleCombo->addItem("RoundJoin", Qt::RoundJoin);
         m_joinStyleCombo->addItem("SvgMiterJoin", Qt::SvgMiterJoin);

         QFormLayout *layout = new QFormLayout();
         layout->addRow("Color", m_colorButton);
         layout->addRow("Width", m_widthSpinBox);
         layout->addRow("Style", m_styleCombo);
         layout->addRow("Cap style", m_capStyleCombo);
         layout->addRow("Join style", m_joinStyleCombo);
         setLayout(layout);

         // Use old style connect on some signals because the signal is overloaded
         connect(m_colorButton, &QPushButton::clicked, this, &PenTool::showColorDialog);
         connect(m_widthSpinBox,
                 static_cast<void (QDoubleSpinBox::*)(double)>(&QDoubleSpinBox::valueChanged),
                 this, &PenTool::updateWidth);
         connect(m_styleCombo,
                 static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
                 this, &PenTool::updateStyle);
         connect(m_capStyleCombo,
                 static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
                 this, &PenTool::updateCapStyle);
         connect(m_joinStyleCombo,
                 static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
                 this, &PenTool::updateJoinStyle);
     }

     void PenTool::setPen(const QPen &pen)
     {
         m_pen = pen;
         m_colorButton->setText(m_pen.color().name());
         m_widthSpinBox->setValue(m_pen.widthF());
         m_styleCombo->setCurrentIndex(m_pen.style()); // index matches the enum
         m_capStyleCombo->setCurrentIndex(m_capStyleCombo->findData(m_pen.capStyle()));
         m_joinStyleCombo->setCurrentIndex(m_joinStyleCombo->findData(m_pen.joinStyle()));
     }

     QPen PenTool::pen() const
     {
         return m_pen;
     }

     QString PenTool::name()
     {
         return name(m_pen);
     }

     QString PenTool::name(const QPen &pen)
     {
         return pen.color().name() + ":" + QString::number(pen.widthF());
     }

     void PenTool::showColorDialog()
     {
         QColorDialog dialog(m_pen.color());
         dialog.show();
         dialog.exec();
         m_pen.setColor(dialog.selectedColor());
         m_colorButton->setText(m_pen.color().name());
         emit changed();
     }

     void PenTool::updateWidth(double width)
     {
         if (!qFuzzyCompare((qreal) width, m_pen.widthF())) {
             m_pen.setWidthF(width);
             emit changed();
         }
     }

     void PenTool::updateStyle(int style)
     {
         if (m_pen.style() != style) {
             m_pen.setStyle((Qt::PenStyle) style);
             emit changed();
         }
     }

     void PenTool::updateCapStyle(int index)
     {
         Qt::PenCapStyle capStyle = (Qt::PenCapStyle) m_capStyleCombo->itemData(index).toInt();
         if (m_pen.capStyle() != capStyle) {
             m_pen.setCapStyle(capStyle);
             emit changed();
         }
     }

     void PenTool::updateJoinStyle(int index)
     {
         Qt::PenJoinStyle joinStyle = (Qt::PenJoinStyle) m_joinStyleCombo->itemData(index).toInt();
         if (m_pen.joinStyle() != joinStyle) {
             m_pen.setJoinStyle(joinStyle);
             emit changed();
         }
     }

     #include "moc_pentool.cpp"