lensdialog.h

/*
For general Scribus (>=1.3.2) copyright and licensing information please refer
to the COPYING file provided with the program. Following this notice may exist
a copyright and/or license notice that predates the release of Scribus 1.3.2
for which a new license (GPL+exception) is in place.
*/
/***************************************************************************
*   Copyright (C) 2007 by Franz Schmid                                     *
*   franz.schmid@altmuehlnet.de                                            *
*                                                                          *
*   This program is free software; you can redistribute it and/or modify   *
*   it under the terms of the GNU General Public License as published by   *
*   the Free Software Foundation; either version 2 of the License, or      *
*   (at your option) any later version.                                    *
*                                                                          *
*   This program is distributed in the hope that it will be useful,        *
*   but WITHOUT ANY WARRANTY; without even the implied warranty of         *
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
*   GNU General Public License for more details.                           *
*                                                                          *
*   You should have received a copy of the GNU General Public License      *
*   along with this program; if not, write to the                          *
*   Free Software Foundation, Inc.,                                        *
*   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.              *
****************************************************************************/

#ifndef LENSDIALOG_H
#define LENSDIALOG_H

#include <QDialog>
#include <QList>
#include <QPainterPath>
#include <QGraphicsItem>
#include <QGraphicsRectItem>
#include <QGraphicsPathItem>
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsSceneHoverEvent>
#include "ui_lensdialogbase.h"
#include "pluginapi.h"
#include "scribusdoc.h"

class LensDialog;

class PLUGIN_API LensItem : public QGraphicsRectItem
{
public:
    LensItem(QRectF geom, LensDialog *parent);
    ~LensItem() {};
    void setStrength(double s);
    void updateEffect();
    QPainterPath lensDeform(const QPainterPath &source, const QPointF &offset, double m_radius, double s);
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget);
    double strength;
    double scaling;
    int handle;
    QPointF mousePoint;
protected:
    QVariant itemChange(GraphicsItemChange change, const QVariant &value);
    void mousePressEvent(QGraphicsSceneMouseEvent *event);
    void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
    void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
    void hoverMoveEvent(QGraphicsSceneHoverEvent *event);
    void hoverLeaveEvent(QGraphicsSceneHoverEvent *);
    LensDialog *dialog;
};

class PLUGIN_API LensDialog : public QDialog, Ui::LensDialogBase
{
    Q_OBJECT

public:
    LensDialog(QWidget* parent, ScribusDoc *doc);
    ~LensDialog() {};
    void addItemsToScene(Selection* itemSelection, ScribusDoc *doc, QGraphicsPathItem* parentItem, PageItem* parent);
    void lensSelected(LensItem *item);
    void setLensPositionValues(QPointF p);
    QGraphicsScene scene;
    QList<QPainterPath> origPath;
    QList<QGraphicsPathItem*> origPathItem;
    QList<PageItem*> origPageItem;
    QList<LensItem*> lensList;
    int currentLens;
    bool isFirst;

protected:
    void showEvent(QShowEvent *e);

private slots:
    void doZoomIn();
    void doZoomOut();
    void addLens();
    void removeLens();
    void changeLens();
    void selectionHasChanged();
    void setNewLensX(double x);
    void setNewLensY(double y);
    void setNewLensRadius(double radius);
    void setNewLensStrength(double s);
};

#endif