Cppcheck - HTML report - digiKam-nl-search-more-criteria-rev-e2466e0973

# Cppcheck report - digiKam-nl-search-more-criteria-rev-e2466e0973: ../../core/libs/widgets/colors/dcolorselector.cpp

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    /* ============================================================
     *
     * This file is a part of digiKam project
     * https://www.digikam.org
     *
     * Date        : 2010-02-20
     * Description : color selector widget
     *
     * SPDX-FileCopyrightText: 2010-2026 by Gilles Caulier <caulier dot gilles at gmail dot com>
     *
     * SPDX-License-Identifier: GPL-2.0-or-later
     *
     * ============================================================ */

    #include "dcolorselector.h"

    // Qt includes

    #include <QWidget>
    #include <QPainter>
    #include <QColorDialog>
    #include <QStyleOptionButton>
    #include <qdrawutil.h>

    // Local includes

    #include "digikam_debug.h"

    namespace Digikam
    {

    class Q_DECL_HIDDEN DColorSelector::Private
    {
    public:

        Private() = default;

    public:

        QColor color;
        bool   alpha    = false;
    };

    DColorSelector::DColorSelector(QWidget* const parent)
        : QPushButton(parent),
          d          (new Private)
    {
        connect(this, SIGNAL(clicked()),
                this, SLOT(slotBtnClicked()));
    }

    DColorSelector::~DColorSelector()
    {
        delete d;
    }

    void DColorSelector::setColor(const QColor& color)<--- Shadow argument
    {
        if (color.isValid())
        {
            d->color = color;
            update();
        }
    }

    QColor DColorSelector::color() const
    {
        return d->color;
    }

    void DColorSelector::setAlphaChannelEnabled(bool b)
    {
        d->alpha = b;
    }

    void DColorSelector::slotBtnClicked()
    {
        QColor clr = QColorDialog::getColor(d->color,
                                            this,
                                            QString(),
                                            d->alpha ? QColorDialog::ShowAlphaChannel
                                                     : QColorDialog::ColorDialogOptions());

        if (clr.isValid())
        {
            setColor(clr);

            Q_EMIT signalColorSelected(clr);
        }
    }

    void DColorSelector::paintEvent(QPaintEvent*)
    {
        QPainter painter(this);
        QStyle* const style = QWidget::style();

        QStyleOptionButton opt;

        opt.initFrom(this);
        opt.state    |= isDown() ? QStyle::State_Sunken : QStyle::State_Raised;
        opt.features  = QStyleOptionButton::None;
        opt.icon      = QIcon();
        opt.text.clear();

        style->drawControl(QStyle::CE_PushButtonBevel, &opt, &painter, this);

        QRect labelRect = style->subElementRect(QStyle::SE_PushButtonContents, &opt, this);
        int shift       = style->pixelMetric(QStyle::PM_ButtonMargin, &opt, this) / 2;
        labelRect.adjust(shift, shift, -shift, -shift);
        int x, y, w, h;
        labelRect.getRect(&x, &y, &w, &h);

        if (isChecked() || isDown())
        {
            x += style->pixelMetric(QStyle::PM_ButtonShiftHorizontal, &opt, this);
            y += style->pixelMetric(QStyle::PM_ButtonShiftVertical,   &opt, this);
        }

        QColor fillCol = isEnabled() ? d->color : palette().color(backgroundRole());
        qDrawShadePanel(&painter, x, y, w, h, palette(), true, 1, nullptr);

        if (fillCol.isValid())
        {
            const QRect rect(x + 1, y + 1, w - 2, h - 2);

            if (fillCol.alpha() < 255)
            {
                QPixmap chessboardPattern(16, 16);
                QPainter patternPainter(&chessboardPattern);
                patternPainter.fillRect(0, 0, 8, 8, Qt::black);
                patternPainter.fillRect(8, 8, 8, 8, Qt::black);
                patternPainter.fillRect(0, 8, 8, 8, Qt::white);
                patternPainter.fillRect(8, 0, 8, 8, Qt::white);
                patternPainter.end();
                painter.fillRect(rect, QBrush(chessboardPattern));
            }

            painter.fillRect(rect, fillCol);
        }

        if (hasFocus())
        {
            QRect focusRect = style->subElementRect(QStyle::SE_PushButtonFocusRect, &opt, this);
            QStyleOptionFocusRect focusOpt;
            focusOpt.initFrom(this);
            focusOpt.rect            = focusRect;
            focusOpt.backgroundColor = palette().window().color();
            style->drawPrimitive(QStyle::PE_FrameFocusRect, &focusOpt, &painter, this);
        }
    }

    } // namespace Digikam

    #include "moc_dcolorselector.cpp"