KDChartAbstractAreaBase.cpp

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/****************************************************************************
**
** This file is part of the KD Chart library.
**
** SPDX-FileCopyrightText: 2001 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
**
** SPDX-License-Identifier: MIT
**
****************************************************************************/
 
#include "KDChartAbstractAreaBase.h"
#include "KDChartAbstractAreaBase_p.h"
#include "KDChartPainterSaver_p.h"
#include "KDChartPrintingParameters.h"
#include <KDChartBackgroundAttributes.h>
#include <KDChartFrameAttributes.h>
#include <KDChartTextAttributes.h>
#include <QPainter>
 
#include <KDABLibFakes>
#include <QPainterPath>
 
using namespace KDChart;
 
AbstractAreaBase::Private::Private()
{
    init();
}
 
AbstractAreaBase::Private::~Private()
{
}
 
void AbstractAreaBase::Private::init()
{
}
 
AbstractAreaBase::AbstractAreaBase()
    : _d(new Private())
{
}
 
AbstractAreaBase::~AbstractAreaBase()
{
    delete _d;
    _d = nullptr;
}
 
void AbstractAreaBase::init()
{
}
 
#define d d_func()
 
bool AbstractAreaBase::compare(const AbstractAreaBase *other) const
{
    if (other == this)
        return true;
    if (!other) {
        return false;
    }
    return (frameAttributes() == other->frameAttributes()) && (backgroundAttributes() == other->backgroundAttributes());
}
 
void AbstractAreaBase::alignToReferencePoint(const RelativePosition &position)
{
    Q_UNUSED(position);
    // PENDING(kalle) FIXME
    qWarning("Sorry, not implemented: void AbstractAreaBase::alignToReferencePoint( const RelativePosition& position )");
}
 
void AbstractAreaBase::setFrameAttributes(const FrameAttributes &a)
{
    if (d->frameAttributes == a)
        return;
 
    d->frameAttributes = a;
    positionHasChanged();
}
 
FrameAttributes AbstractAreaBase::frameAttributes() const
{
    return d->frameAttributes;
}
 
void AbstractAreaBase::setBackgroundAttributes(const BackgroundAttributes &a)
{
    if (d->backgroundAttributes == a)
        return;
 
    d->backgroundAttributes = a;
    positionHasChanged();
}
 
BackgroundAttributes AbstractAreaBase::backgroundAttributes() const
{
    return d->backgroundAttributes;
}
 
/* static */
void AbstractAreaBase::paintBackgroundAttributes(QPainter &painter, const QRect &rect,
                                                 const KDChart::BackgroundAttributes &attributes)
{
    if (!attributes.isVisible())
        return;
 
    /* first draw the brush (may contain a pixmap)*/
    if (Qt::NoBrush != attributes.brush().style()) {
        KDChart::PainterSaver painterSaver(&painter);
        painter.setPen(Qt::NoPen);
        const QPointF newTopLeft(painter.deviceTransform().map(rect.topLeft()));
        painter.setBrushOrigin(newTopLeft);
        painter.setBrush(attributes.brush());
        painter.drawRect(rect.adjusted(0, 0, -1, -1));
    }
    /* next draw the backPixmap over the brush */
    if (!attributes.pixmap().isNull() && attributes.pixmapMode() != BackgroundAttributes::BackgroundPixmapModeNone) {
        QPointF ol = rect.topLeft();
        if (BackgroundAttributes::BackgroundPixmapModeCentered == attributes.pixmapMode()) {
            ol.setX(rect.center().x() - attributes.pixmap().width() / 2);
            ol.setY(rect.center().y() - attributes.pixmap().height() / 2);
            painter.drawPixmap(ol, attributes.pixmap());
        } else {
            QTransform m;
            qreal zW = ( qreal )rect.width() / ( qreal )attributes.pixmap().width();
            qreal zH = ( qreal )rect.height() / ( qreal )attributes.pixmap().height();
            switch (attributes.pixmapMode()) {
            case BackgroundAttributes::BackgroundPixmapModeScaled: {
                qreal z;
                z = qMin(zW, zH);
                m.scale(z, z);
            } break;
            case BackgroundAttributes::BackgroundPixmapModeStretched:
                m.scale(zW, zH);
                break;
            default:; // Cannot happen, previously checked
            }
            QPixmap pm = attributes.pixmap().transformed(m);
            ol.setX(rect.center().x() - pm.width() / 2);
            ol.setY(rect.center().y() - pm.height() / 2);
            painter.drawPixmap(ol, pm);
        }
    }
}
 
/* static */
void AbstractAreaBase::paintFrameAttributes(QPainter &painter, const QRect &rect,
                                            const KDChart::FrameAttributes &attributes)
{
    if (!attributes.isVisible())
        return;
 
    // Note: We set the brush to NoBrush explicitly here.
    //       Otherwise we might get a filled rectangle, so any
    //       previously drawn background would be overwritten by that area.
 
    const QPen oldPen(painter.pen());
    const QBrush oldBrush(painter.brush());
 
    painter.setPen(PrintingParameters::scalePen(attributes.pen()));
    painter.setBrush(Qt::NoBrush);
    painter.drawRoundedRect(rect.adjusted(0, 0, -1, -1), attributes.cornerRadius(), attributes.cornerRadius());
 
    painter.setBrush(oldBrush);
    painter.setPen(oldPen);
}
 
void AbstractAreaBase::paintBackground(QPainter &painter, const QRect &rect)
{
    Q_ASSERT_X(d != nullptr, "AbstractAreaBase::paintBackground()",
               "Private class was not initialized!");
 
    PainterSaver painterSaver(&painter);
 
    const qreal radius = d->frameAttributes.cornerRadius();
    QPainterPath path;
    path.addRoundedRect(rect.adjusted(0, 0, -1, -1), radius, radius);
    painter.setClipPath(path);
 
    paintBackgroundAttributes(painter, rect, d->backgroundAttributes);
}
 
void AbstractAreaBase::paintFrame(QPainter &painter, const QRect &rect)
{
    Q_ASSERT_X(d != nullptr, "AbstractAreaBase::paintFrame()",
               "Private class was not initialized!");
    paintFrameAttributes(painter, rect, d->frameAttributes);
}
 
void AbstractAreaBase::getFrameLeadings(int &left, int &top, int &right, int &bottom) const
{
    int padding = 0;
    if (d && d->frameAttributes.isVisible()) {
        padding = qMax(d->frameAttributes.padding(), 0);
    }
    left = padding;
    top = padding;
    right = padding;
    bottom = padding;
}
 
QRect AbstractAreaBase::innerRect() const
{
    int left;
    int top;
    int right;
    int bottom;
    getFrameLeadings(left, top, right, bottom);
    return QRect(QPoint(0, 0), areaGeometry().size()).adjusted(left, top, -right, -bottom);
}
 
void AbstractAreaBase::positionHasChanged()
{
    // this block left empty intentionally
}