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/*
sceneinspectorinterface.cpp
This file is part of GammaRay, the Qt application inspection and manipulation tool.
SPDX-FileCopyrightText: 2010 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
Author: Milian Wolff <milian.wolff@kdab.com>
SPDX-License-Identifier: GPL-2.0-or-later
Contact KDAB at <info@kdab.com> for commercial licensing options.
*/
#include "sceneinspectorinterface.h"
#include <common/objectbroker.h>
#include <QGraphicsItem>
#include <QPainter>
using namespace GammaRay;
SceneInspectorInterface::SceneInspectorInterface(QObject *parent)
: QObject(parent)
{
ObjectBroker::registerObject<SceneInspectorInterface *>(this);
}
SceneInspectorInterface::~SceneInspectorInterface() = default;
void SceneInspectorInterface::paintItemDecoration(QGraphicsItem *item, const QTransform &transform,
QPainter *painter)
{
const QRectF itemBoundingRect = item->boundingRect();
// coord system, TODO: nicer axis with arrows, tics, markers for current mouse position etc.
painter->setPen(Qt::black);
const qreal maxX = qMax(qAbs(itemBoundingRect.left()), qAbs(itemBoundingRect.right()));
const qreal maxY = qMax(qAbs(itemBoundingRect.top()), qAbs(itemBoundingRect.bottom()));
const qreal maxXY = qMax(maxX, maxY) * 1.5f;
painter->drawLine(item->mapToScene(-maxXY, 0), item->mapToScene(maxXY, 0));
painter->drawLine(item->mapToScene(0, -maxXY), item->mapToScene(0, maxXY));
painter->setPen(Qt::blue);
const QPolygonF boundingBox = item->mapToScene(itemBoundingRect);
painter->drawPolygon(boundingBox);
painter->setPen(Qt::green);
const QPainterPath shape = item->mapToScene(item->shape());
painter->drawPath(shape);
painter->setPen(Qt::red);
const QPointF transformOrigin = item->mapToScene(item->transformOriginPoint());
painter->drawEllipse(transformOrigin,
5.0 / transform.m11(),
5.0 / transform.m22());
}
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