MainWidget.h

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/***************************************************************************
            MainWidget.h  -  main widget of the Kwave TopWidget
                             -------------------
    begin                : 1999
    copyright            : (C) 1999 by Martin Wilz
    email                : Martin Wilz <mwilz@ernie.mi.uni-koeln.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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef MAIN_WIDGET_H
#define MAIN_WIDGET_H

#include "config.h"

#include <QSize>
#include <QString>
#include <QTimer>

#include <QScrollArea>
#include <QVBoxLayout>
#include <QWidget>

#include "libkwave/CommandHandler.h"

#include "libgui/SignalWidget.h"
#include "libgui/Zoomable.h"

class QCloseEvent;
class QDragEnterEvent;
class QDropEvent;
class QScrollBar;
class QWheelEvent;

namespace Kwave
{

    class FileContext;
    class OverViewWidget;
    class SignalManager;

    //**************************************************************************
    class MainWidget: public QWidget,
                      public CommandHandler,
                      public Zoomable
    {
        Q_OBJECT
    public:

        MainWidget(QWidget *parent,
                   Kwave::FileContext &context,
                   const QSize &preferred_size);

        virtual bool isOK();

        virtual ~MainWidget() Q_DECL_OVERRIDE;

        virtual double zoom() const Q_DECL_OVERRIDE;

        virtual int visibleWidth() const Q_DECL_OVERRIDE;

        virtual sample_index_t visibleSamples() const Q_DECL_OVERRIDE;

        virtual sample_index_t visibleOffset() { return m_offset; }

        virtual QSize sizeHint () const Q_DECL_OVERRIDE { return m_preferred_size; }

    protected:

        virtual void dragEnterEvent(QDragEnterEvent *event) Q_DECL_OVERRIDE;

        virtual void dropEvent(QDropEvent *event) Q_DECL_OVERRIDE;

        virtual void resizeEvent(QResizeEvent *event) Q_DECL_OVERRIDE;

        virtual void wheelEvent(QWheelEvent *event) Q_DECL_OVERRIDE;

        virtual void closeEvent(QCloseEvent *e) Q_DECL_OVERRIDE;

    protected slots:

        void updateViewRange();

    public slots:

        virtual int executeCommand(const QString &command) Q_DECL_OVERRIDE;

        void setOffset(sample_index_t new_offset);

        virtual void scrollTo(sample_index_t pos) Q_DECL_OVERRIDE;

        virtual void setZoom(double new_zoom) Q_DECL_OVERRIDE;

        void zoomSelection();

        void zoomAll();

        void zoomNormal();

        void zoomIn(int pos = -1);

        void zoomOut(int pos = -1);

    private slots:

        void slotTrackInserted(unsigned int index, Kwave::Track *track);

        void slotTrackDeleted(unsigned int index, Kwave::Track *track);

        void refreshHorizontalScrollBar();

        void horizontalScrollBarMoved(int newval);

    signals:

        void sigZoomChanged(double zoom);

        void sigCommand(const QString &command);

        void sigVisibleRangeChanged(sample_index_t offset,
                                    sample_index_t visible,
                                    sample_index_t total);

    private:

        sample_index_t ms2samples(double ms);

        sample_index_t pixels2samples(unsigned int pixels) const;

        int samples2pixels(sample_index_t samples) const;

        double fullZoom() const;

        void fixZoomAndOffset(double zoom, sample_index_t offset);

        void addLabel(sample_index_t pos, const QString &description);

        bool labelProperties(Kwave::Label &label);

        int loadLabels(const QString &filename);

        int saveLabels(const QString &filename);

    private:

        Kwave::FileContext &m_context;

        QVBoxLayout m_upper_dock;

        QVBoxLayout m_lower_dock;

        QScrollArea m_scroll_area;

        QScrollBar *m_horizontal_scrollbar;

        Kwave::SignalWidget m_signal_widget;

        Kwave::OverViewWidget *m_overview;

        sample_index_t m_offset;

        double m_zoom;

        QSize m_preferred_size;

        QTimer m_delayed_update_timer;
    };
}

#endif /* MAIN_WIDGET_H */

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