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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#ifndef SNAPPER_H
#define SNAPPER_H
#include "formeditoritem.h"
QT_BEGIN_NAMESPACE
class QLineF;
QT_END_NAMESPACE
namespace QmlDesigner {
class Snapper
{
public:
Snapper();
void setContainerFormEditorItem(FormEditorItem *formEditorItem);
FormEditorItem *containerFormEditorItem() const;
void setTransformtionSpaceFormEditorItem(FormEditorItem *formEditorItem);
FormEditorItem *transformtionSpaceFormEditorItem() const;
double snappedVerticalOffset(const QRectF &boundingRect) const;
double snappedHorizontalOffset(const QRectF &boundingRect) const;
double snapTopOffset(const QRectF &boundingRect) const;
double snapRightOffset(const QRectF &boundingRect) const;
double snapLeftOffset(const QRectF &boundingRect) const;
double snapBottomOffset(const QRectF &boundingRect) const;
QList<QLineF> horizontalSnappedLines(const QRectF &boundingRect, QList<QRectF> *boundingRects = 0) const;
QList<QLineF> verticalSnappedLines(const QRectF &boundingRect, QList<QRectF> *boundingRects = 0) const;
void setSnappingDistance(double snappingDistance);
double snappingDistance() const;
void updateSnappingLines(const QList<FormEditorItem*> &exceptionList);
void updateSnappingLines(FormEditorItem* exceptionItem);
QList<QGraphicsItem*> generateSnappingLines(const QList<QRectF> &boundingRectList,
QGraphicsItem *layerItem,
const QTransform &transform);
QList<QGraphicsItem*> generateSnappingLines(const QRectF &boundingRect,
QGraphicsItem *layerItem,
const QTransform &transform);
protected:
double snappedOffsetForLines(const SnapLineMap &snappingLineMap,
double value) const;
double snappedOffsetForOffsetLines(const SnapLineMap &snappingOffsetMap,
Qt::Orientation orientation,
double value,
double lowerLimit,
double upperLimit) const;
QList<QLineF> findSnappingLines(const SnapLineMap &snappingLineMap,
Qt::Orientation orientation,
double snapLine,
double lowerLimit,
double upperLimit,
QList<QRectF> *boundingRects = 0) const;
QList<QLineF> findSnappingOffsetLines(const SnapLineMap &snappingOffsetMap,
Qt::Orientation orientation,
double snapLine,
double lowerLimit,
double upperLimit,
QList<QRectF> *boundingRects = 0) const;
QLineF createSnapLine(Qt::Orientation orientation,
double snapLine,
double lowerEdge,
double upperEdge,
const QRectF &itemRect) const;
// bool canSnap(QList<double> snappingLineList, double value) const;
private:
FormEditorItem *m_containerFormEditorItem;
FormEditorItem *m_transformtionSpaceFormEditorItem;
double m_snappingDistance;
};
}
#endif // SNAPPER_H
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