rectangle.cpp (40)

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#include "rectangle.h"
#include <QPainter>
#include <QPixmap>

#define HANDLE_MARGIN 10
#define HANDLE_VIRTUAL_SIZE 50

QPixmap* Rectangle::resizeHandle(NULL);

Rectangle::Rectangle(qreal x, qreal y, qreal w, qreal h, QGraphicsItem * parent) :
    QGraphicsRectItem(x, y, w, h, parent)
{
    setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
}

QRectF Rectangle::boundingRect() const
{
    QRectF ret = QGraphicsRectItem::boundingRect();
    ret.setRect(ret.x() - HANDLE_MARGIN - 1, ret.y() - HANDLE_MARGIN - 1,
                ret.width() + HANDLE_MARGIN + HANDLE_MARGIN + 1,
                ret.height() + HANDLE_MARGIN + HANDLE_MARGIN + 1);
    return ret.normalized();
}


QRectF Rectangle::innerBoundingRect () const
{
    return QGraphicsRectItem::boundingRect();
}

void Rectangle::resize(ResizeHandleIdx hidx, QPointF pos)
{
    QRectF bounds = QGraphicsRectItem::boundingRect();
    switch(hidx)
    {
    case RH_TOP_LEFT:
        bounds.setTopLeft(pos);
        break;
    case RH_TOP_RIGHT:
        bounds.setTopRight(pos);
        break;
    case RH_BOTTOM_LEFT:
        bounds.setBottomLeft(pos);
        break;
    case RH_BOTTOM_RIGHT:
        bounds.setBottomRight(pos);
        break;
    default:    // pacify the compiler
        break;
    }
    prepareGeometryChange();
    setRect(bounds);
}

void Rectangle::resizeDone()
{
    setRect(rect().normalized());
}

Rectangle::ResizeHandleIdx Rectangle::handleAt(QPointF pos)
{
    QRectF bounds = innerBoundingRect();
    QRectF handleBounds(0, 0, HANDLE_VIRTUAL_SIZE, HANDLE_VIRTUAL_SIZE);
    handleBounds.moveCenter(mapToScene(bounds.topLeft()));
    //qDebug() << "handleAt: " << bounds.topLeft() << " in scene coords "
    //      << mapToScene(bounds.topLeft()) << " near " << pos;
    if (handleBounds.contains(pos))
        return RH_TOP_LEFT;
    handleBounds.moveCenter(mapToScene(bounds.topRight()));
    if (handleBounds.contains(pos))
        return RH_TOP_RIGHT;
    handleBounds.moveCenter(mapToScene(bounds.bottomLeft()));
    if (handleBounds.contains(pos))
        return RH_BOTTOM_LEFT;
    handleBounds.moveCenter(mapToScene(bounds.bottomRight()));
    if (handleBounds.contains(pos))
        return RH_BOTTOM_RIGHT;
    return RH_NONE;
}

int Rectangle::handleWidth()
{
    if (!resizeHandle)
        resizeHandle = new QPixmap(":/images/resize-handle.png");
    return resizeHandle->width();
}

void Rectangle::paint ( QPainter * painter,
        const QStyleOptionGraphicsItem * option, QWidget * widget )
{
//  qDebug("Rectangle::paint; selected? %d", isSelected());
    QGraphicsRectItem::paint(painter, option, widget);
    QRectF bounds = boundingRect();
    if (isSelected())
    {
        int halfHandleW = handleWidth() / -2;
        QRectF outerBounds = QGraphicsRectItem::boundingRect()
                .adjusted(halfHandleW, halfHandleW, halfHandleW, halfHandleW);
        painter->drawPixmap(outerBounds.topLeft(), *resizeHandle);
        painter->drawPixmap(outerBounds.topRight(), *resizeHandle);
        painter->drawPixmap(outerBounds.bottomLeft(), *resizeHandle);
        painter->drawPixmap(outerBounds.bottomRight(), *resizeHandle);
    }
//  painter->setPen(Qt::blue);
//  painter->drawRect(bounds);
}

void Rectangle::buttonDown(QPointF scenePos)
{
    m_buttonDownPos = mapFromScene(scenePos);
}

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