/* -*- 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 and QMUL.
    
    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 _PANESTACK_H_
#define _PANESTACK_H_

#include <QFrame>

#include <map>

class QWidget;
class QLabel;
class QStackedWidget;
class QSplitter;
class QGridLayout;
class View;
class Pane;
class Layer;
class ViewManager;
class PropertyContainer;
class PropertyStack;

class PaneStack : public QFrame
{
    Q_OBJECT

public:
    PaneStack(QWidget *parent, ViewManager *viewManager);

    Pane *addPane(bool suppressPropertyBox = false); // I own the returned value
    Pane *insertPane(int index, bool suppressPropertyBox = false); // I own the returned value
    void deletePane(Pane *pane); // Deletes the pane, but _not_ its layers

    int getPaneCount() const; // Returns only count of visible panes
    Pane *getPane(int n); // Of visible panes; I own the returned value
    int getPaneIndex(Pane *pane); // so getPane(index)==pane; -1 if absent

    void hidePane(Pane *pane); // Also removes pane from getPane/getPaneCount
    void showPane(Pane *pane); // Returns pane to getPane/getPaneCount

    int getHiddenPaneCount() const;
    Pane *getHiddenPane(int n); // I own the returned value

    void setCurrentPane(Pane *pane);
    void setCurrentLayer(Pane *pane, Layer *layer);
    Pane *getCurrentPane();

    enum LayoutStyle {
        NoPropertyStacks = 0,
        SinglePropertyStackLayout = 1,
        PropertyStackPerPaneLayout = 2
    };

    LayoutStyle getLayoutStyle() const { return m_layoutStyle; }
    void setLayoutStyle(LayoutStyle style);

    void setPropertyStackMinWidth(int mw);

    void sizePanesEqually();

signals:
    void currentPaneChanged(Pane *pane);
    void currentLayerChanged(Pane *pane, Layer *layer);
    void rightButtonMenuRequested(Pane *pane, QPoint position);
    void propertyStacksResized(int width);
    void propertyStacksResized();
    void contextHelpChanged(const QString &);

    void paneAdded(Pane *pane);
    void paneAdded();
    void paneHidden(Pane *pane);
    void paneHidden();
    void paneAboutToBeDeleted(Pane *pane);
    void paneDeleted();

    void dropAccepted(Pane *pane, QStringList uriList);
    void dropAccepted(Pane *pane, QString text);

    void paneDeleteButtonClicked(Pane *pane);

public slots:
    void propertyContainerAdded(PropertyContainer *);
    void propertyContainerRemoved(PropertyContainer *);
    void propertyContainerSelected(View *client, PropertyContainer *);
    void viewSelected(View *v);
    void paneInteractedWith();
    void rightButtonMenuRequested(QPoint);
    void paneDropAccepted(QStringList);
    void paneDropAccepted(QString);
    void paneDeleteButtonClicked();
    void indicatorClicked();

protected:
    Pane *m_currentPane;

    struct PaneRec
    {
	Pane        *pane;
	QWidget     *propertyStack;
	QLabel      *currentIndicator;
        QFrame      *frame;
        QGridLayout *layout;
    };

    std::vector<PaneRec> m_panes;
    std::vector<PaneRec> m_hiddenPanes;

    std::map<QWidget *, Pane *> m_xButtonMap;

    QSplitter *m_splitter;
    QStackedWidget *m_propertyStackStack;

    ViewManager *m_viewManager; // I don't own this
    int m_propertyStackMinWidth;
    void sizePropertyStacks();

    LayoutStyle m_layoutStyle;
};

#endif