pentool.cpp Example File

piechartcustomization/pentool.cpp
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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"