qt-creator/share/qtcreator/qml/qmljsdebugger/editor/liveselectionrectangle.cpp

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#include "liveselectionrectangle.h"
#include "qmlinspectorconstants.h"

#include <QtGui/QPen>
#include <QtGui/QGraphicsRectItem>
#include <QtGui/QGraphicsObject>
#include <QtGui/QGraphicsScene>

#include <QtCore/QtDebug>

#include <cmath>

namespace QmlJSDebugger {

class SelectionRectShape : public QGraphicsRectItem
{
public:
    SelectionRectShape(QGraphicsItem *parent = 0) : QGraphicsRectItem(parent) {}
    int type() const { return Constants::EditorItemType; }
};

LiveSelectionRectangle::LiveSelectionRectangle(QGraphicsObject *layerItem)
    : m_controlShape(new SelectionRectShape(layerItem)),
      m_layerItem(layerItem)
{
    m_controlShape->setPen(QPen(Qt::black));
    m_controlShape->setBrush(QColor(128, 128, 128, 50));
}

LiveSelectionRectangle::~LiveSelectionRectangle()
{
    if (m_layerItem)
        m_layerItem.data()->scene()->removeItem(m_controlShape);
}

void LiveSelectionRectangle::clear()
{
    hide();
}
void LiveSelectionRectangle::show()
{
    m_controlShape->show();
}

void LiveSelectionRectangle::hide()
{
    m_controlShape->hide();
}

QRectF LiveSelectionRectangle::rect() const
{
    return m_controlShape->mapFromScene(m_controlShape->rect()).boundingRect();
}

void LiveSelectionRectangle::setRect(const QPointF &firstPoint,
                                 const QPointF &secondPoint)
{
    double firstX = std::floor(firstPoint.x()) + 0.5;
    double firstY = std::floor(firstPoint.y()) + 0.5;
    double secondX = std::floor(secondPoint.x()) + 0.5;
    double secondY = std::floor(secondPoint.y()) + 0.5;
    QPointF topLeftPoint(firstX < secondX ? firstX : secondX,
                         firstY < secondY ? firstY : secondY);
    QPointF bottomRightPoint(firstX > secondX ? firstX : secondX,
                             firstY > secondY ? firstY : secondY);

    QRectF rect(topLeftPoint, bottomRightPoint);
    m_controlShape->setRect(rect);
}

}