//=============================================================================
//  MuseScore
//  Music Composition & Notation
//
//  Copyright (C) 2002-2011 Werner Schweer
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License version 2
//  as published by the Free Software Foundation and appearing in
//  the file LICENCE.GPL
//=============================================================================

#ifndef __BOX_H__
#define __BOX_H__

/**
 \file
 Definition of HBox and VBox classes.
*/

#include "measurebase.h"
#include "property.h"

namespace Ms {
class MuseScoreView;

//---------------------------------------------------------
//   @@ Box
///    virtual base class for frames "boxes"
//---------------------------------------------------------

class Box : public MeasureBase
{
    Spatium _boxWidth             { Spatium(0) };    // only valid for HBox
    Spatium _boxHeight            { Spatium(0) };    // only valid for VBox
    qreal _topGap                 { 0.0 };           // distance from previous system (left border for hbox)
                                                     // initialized with Sid::systemFrameDistance
    qreal _bottomGap              { 0.0 };           // distance to next system (right border for hbox)
                                                     // initialized with Sid::frameSystemDistance
    qreal _leftMargin             { 0.0 };
    qreal _rightMargin            { 0.0 };           // inner margins in metric mm
    qreal _topMargin              { 0.0 };
    qreal _bottomMargin           { 0.0 };
    bool _isAutoSizeEnabled       { true };
    bool editMode                 { false };

public:
    Box(Score*);

    void scanElements(void* data, void (* func)(void*, Element*), bool all=true) override;

    virtual void draw(QPainter*) const override;
    virtual bool isEditable() const override { return true; }

    virtual void startEdit(EditData&) override;
    virtual bool edit(EditData&) override;
    virtual void startEditDrag(EditData&) override;
    virtual void editDrag(EditData&) override;
    virtual void endEdit(EditData&) override;

    virtual void layout() override;
    virtual void write(XmlWriter&) const override;
    virtual void write(XmlWriter& xml, int, bool, bool) const override { write(xml); }
    virtual void writeProperties(XmlWriter&) const override;
    virtual bool readProperties(XmlReader&) override;
    virtual void read(XmlReader&) override;
    virtual bool acceptDrop(EditData&) const override;
    virtual Element* drop(EditData&) override;
    virtual void add(Element* e) override;

    QRectF contentRect() const;
    Spatium boxWidth() const { return _boxWidth; }
    void setBoxWidth(Spatium val) { _boxWidth = val; }
    Spatium boxHeight() const { return _boxHeight; }
    void setBoxHeight(Spatium val) { _boxHeight = val; }
    qreal leftMargin() const { return _leftMargin; }
    qreal rightMargin() const { return _rightMargin; }
    qreal topMargin() const { return _topMargin; }
    qreal bottomMargin() const { return _bottomMargin; }
    void setLeftMargin(qreal val) { _leftMargin = val; }
    void setRightMargin(qreal val) { _rightMargin = val; }
    void setTopMargin(qreal val) { _topMargin = val; }
    void setBottomMargin(qreal val) { _bottomMargin = val; }
    qreal topGap() const { return _topGap; }
    void setTopGap(qreal val) { _topGap = val; }
    qreal bottomGap() const { return _bottomGap; }
    void setBottomGap(qreal val) { _bottomGap = val; }
    bool isAutoSizeEnabled() const { return _isAutoSizeEnabled; }
    void setAutoSizeEnabled(const bool val) { _isAutoSizeEnabled = val; }
    void copyValues(Box* origin);

    virtual QVariant getProperty(Pid propertyId) const override;
    virtual bool setProperty(Pid propertyId, const QVariant&) override;
    virtual QVariant propertyDefault(Pid) const override;
    virtual QString accessibleExtraInfo() const override;

    // TODO: add a grip for moving the entire box
    EditBehavior normalModeEditBehavior() const override { return EditBehavior::Edit; }
    int gripsCount() const override { return 1; }
    Grip initialEditModeGrip() const override { return Grip::START; }
    Grip defaultGrip() const override { return Grip::START; }
    std::vector<QPointF> gripsPositions(const EditData&) const override { return { QPointF() }; }   // overriden in descendants
};

//---------------------------------------------------------
//   @@ HBox
///    horizontal frame
//---------------------------------------------------------

class HBox final : public Box
{
    bool _createSystemHeader { true };

public:
    HBox(Score* score);
    virtual ~HBox() {}

    HBox* clone() const override { return new HBox(*this); }
    ElementType type() const override { return ElementType::HBOX; }

    void layout() override;
    void writeProperties(XmlWriter&) const override;
    bool readProperties(XmlReader&) override;

    QRectF drag(EditData&) override;
    void endEditDrag(EditData&) override;
    void layout2();
    bool isMovable() const override;
    void computeMinWidth() override;

    bool createSystemHeader() const { return _createSystemHeader; }
    void setCreateSystemHeader(bool val) { _createSystemHeader = val; }

    QVariant getProperty(Pid propertyId) const override;
    bool setProperty(Pid propertyId, const QVariant&) override;
    QVariant propertyDefault(Pid) const override;

    std::vector<QPointF> gripsPositions(const EditData&) const override;
};

//---------------------------------------------------------
//   @@ VBox
///    vertical frame
//---------------------------------------------------------

class VBox : public Box
{
public:
    VBox(Score* score);
    virtual ~VBox() {}

    VBox* clone() const override { return new VBox(*this); }
    ElementType type() const override { return ElementType::VBOX; }

    qreal minHeight() const;
    qreal maxHeight() const;

    QVariant getProperty(Pid propertyId) const override;
    void layout() override;

    std::vector<QPointF> gripsPositions(const EditData&) const override;
};

//---------------------------------------------------------
//   @@ FBox
///    frame containing fret diagrams
//---------------------------------------------------------

class FBox : public VBox
{
public:
    FBox(Score* score)
        : VBox(score) {}
    virtual ~FBox() {}

    FBox* clone() const override { return new FBox(*this); }
    ElementType type() const override { return ElementType::FBOX; }

    void layout() override;
    void add(Element*) override;
};
}     // namespace Ms
#endif