- Qt 5.5
- Qt Widgets
- Pad Navigator Example
- roundrectitem.cpp Example File
- Qt 5.5.1 Reference Documentation

# roundrectitem.cpp Example File

graphicsview/padnavigator/roundrectitem.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
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    #include "roundrectitem.h"

    #include <QApplication>
    #include <QPainter>
    #include <QPalette>

    RoundRectItem::RoundRectItem(const QRectF &bounds, const QColor &color,
                                 QGraphicsItem *parent)
        : QGraphicsObject(parent), fillRect(false), bounds(bounds)
    {
        gradient.setStart(bounds.topLeft());
        gradient.setFinalStop(bounds.bottomRight());
        gradient.setColorAt(0, color);
        gradient.setColorAt(1, color.dark(200));
        setCacheMode(ItemCoordinateCache);
    }

    QPixmap RoundRectItem::pixmap() const
    {
        return pix;
    }
    void RoundRectItem::setPixmap(const QPixmap &pixmap)
    {
        pix = pixmap;
        update();
    }

    QRectF RoundRectItem::boundingRect() const
    {
        return bounds.adjusted(0, 0, 2, 2);
    }

    void RoundRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                              QWidget *widget)
    {
        Q_UNUSED(option);
        Q_UNUSED(widget);
        painter->setPen(Qt::NoPen);
        painter->setBrush(QColor(0, 0, 0, 64));
        painter->drawRoundRect(bounds.translated(2, 2));
        if (fillRect)
            painter->setBrush(QApplication::palette().brush(QPalette::Window));
        else
            painter->setBrush(gradient);
        painter->setPen(QPen(Qt::black, 1));
        painter->drawRoundRect(bounds);
        if (!pix.isNull()) {
            painter->scale(1.95, 1.95);
            painter->drawPixmap(-pix.width() / 2, -pix.height() / 2, pix);
        }
    }

    bool RoundRectItem::fill() const
    {
        return fillRect;
    }
    void RoundRectItem::setFill(bool fill)
    {
        fillRect = fill;
        update();
    }