annotate view/Panner.h @ 150:b1a3a9400284

* Add a bit of resistance to pane dragging so as to make it harder to
  inadvertently drag in the other axis from the one you intended

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _PAN_WIDGET_H_
#define _PAN_WIDGET_H_

#include "View.h"

#include <QPoint>

class QWidget;
class QPaintEvent;
class Layer;
class View;

#include <map>

class Panner : public View
{
    Q_OBJECT

public:
    Panner(QWidget *parent = 0);

    void registerView(View *widget);
    void unregisterView(View *widget);

    virtual QString getPropertyContainerIconName() const { return "panner"; }

public slots:
    virtual void modelChanged(size_t startFrame, size_t endFrame);
    virtual void modelReplaced();

    virtual void viewManagerCentreFrameChanged(void *, unsigned long, bool);
    virtual void viewManagerZoomLevelChanged(void *, unsigned long, bool);
    virtual void viewManagerPlaybackFrameChanged(unsigned long);

protected:
    virtual void paintEvent(QPaintEvent *e);
    virtual void mousePressEvent(QMouseEvent *e);
    virtual void mouseReleaseEvent(QMouseEvent *e);
    virtual void mouseMoveEvent(QMouseEvent *e);
    virtual bool shouldLabelSelections() const { return false; }

    QPoint m_clickPos;
    QPoint m_mousePos;
    bool m_clickedInRange;
    size_t m_dragCentreFrame;
    
    typedef std::set<void *> WidgetSet;
    WidgetSet m_widgets;
};

#endif