SelectionMoveResizer.h

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/***************************************************************************
    File                 : SelectionMoveResizer.h
    Project              : SciDAVis
    --------------------------------------------------------------------
    Copyright            : (C) 2007 by Knut Franke
    Email (use @ for *)  : knut.franke*gmx.de
    Description          : Selection of Widgets and QwtPlotMarkers

 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *  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 SELECTION_MOVE_RESIZER_H
#define SELECTION_MOVE_RESIZER_H

#include <QWidget>
#include <QList>
#include <QRect>

class QPoint;
class QwtPlotMarker;
class Legend;
class ArrowMarker;
class ImageMarker;

class SelectionMoveResizer : public QWidget
{
    Q_OBJECT

    public:
        SelectionMoveResizer(Legend *target);
        SelectionMoveResizer(ArrowMarker *target);
        SelectionMoveResizer(ImageMarker *target);
        SelectionMoveResizer(QWidget *target);
        ~SelectionMoveResizer();
        virtual bool eventFilter(QObject *o, QEvent *e);
        bool contains(QWidget *w) const { return d_widgets.contains(w); };
        bool contains(Legend *m) const { return d_legend_markers.contains(m); };
        bool contains(ArrowMarker *m) const { return d_line_markers.contains(m); };
        bool contains(ImageMarker *m) const { return d_image_markers.contains(m); };

    public slots:
        void add(Legend *target);
        void add(ArrowMarker *target);
        void add(ImageMarker *target);
        void add(QWidget *target);
        int removeAll(Legend *target);
        int removeAll(ArrowMarker *target);
        int removeAll(ImageMarker *target);
        int removeAll(QWidget *target);
        void recalcBoundingRect();

    signals:
        void targetsChanged();

    protected:
        enum Operation { None=-2, Move, Resize_N, Resize_NE, Resize_E, Resize_SE, Resize_S, Resize_SW, Resize_W, Resize_NW };

        virtual void paintEvent(QPaintEvent *e);
        virtual void mousePressEvent(QMouseEvent *e);
        virtual void mouseMoveEvent(QMouseEvent *e);
        virtual void mouseReleaseEvent(QMouseEvent *e);
        virtual void keyPressEvent(QKeyEvent *e);
        virtual void mouseDoubleClickEvent(QMouseEvent *e);

    private:
        static const int handler_size = 10;
        static const QRect handlerRect(QRect rect, Operation op);
        QRect operateOn(const QRect in);
        void operateOnTargets();
        void init();
        QRect boundingRectOf(QwtPlotMarker *target) const;

        QList <Legend *> d_legend_markers;
        QList <ArrowMarker *> d_line_markers;
        QList <ImageMarker *> d_image_markers;
        QList <QWidget *> d_widgets;
        QRect d_bounding_rect;
        Operation d_op;
        QPoint d_op_start;
        QPoint d_op_dp;

    private slots:
        void removeWidget(QObject* w) { removeAll((QWidget*) w); }
};

#endif // ifndef SELECTION_MOVE_RESIZER_H