qwt_dyngrid_layout.h

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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#ifndef QWT_DYNGRID_LAYOUT_H
#define QWT_DYNGRID_LAYOUT_H

#include "qwt_global.h"
#include <qlayout.h>

template <typename T> class QList;

class QWT_EXPORT QwtDynGridLayout : public QLayout
{
    Q_OBJECT
public:
    explicit QwtDynGridLayout( QWidget *, int margin = 0, int spacing = -1 );
    explicit QwtDynGridLayout( int spacing = -1 );

    virtual ~QwtDynGridLayout();

    virtual void invalidate() QWT_OVERRIDE;

    void setMaxColumns( uint maxColumns );
    uint maxColumns() const;

    uint numRows () const;
    uint numColumns () const;

    virtual void addItem( QLayoutItem * ) QWT_OVERRIDE;

    virtual QLayoutItem *itemAt( int index ) const QWT_OVERRIDE;
    virtual QLayoutItem *takeAt( int index ) QWT_OVERRIDE;
    virtual int count() const QWT_OVERRIDE;

    void setExpandingDirections( Qt::Orientations );
    virtual Qt::Orientations expandingDirections() const QWT_OVERRIDE;
    QList<QRect> layoutItems( const QRect &, uint numColumns ) const;

    virtual int maxItemWidth() const;

    virtual void setGeometry( const QRect & ) QWT_OVERRIDE;

    virtual bool hasHeightForWidth() const QWT_OVERRIDE;
    virtual int heightForWidth( int ) const QWT_OVERRIDE;

    virtual QSize sizeHint() const QWT_OVERRIDE;

    virtual bool isEmpty() const QWT_OVERRIDE;
    uint itemCount() const;

    virtual uint columnsForWidth( int width ) const;

protected:

    void layoutGrid( uint numColumns,
        QVector<int>& rowHeight, QVector<int>& colWidth ) const;

    void stretchGrid( const QRect &rect, uint numColumns,
        QVector<int>& rowHeight, QVector<int>& colWidth ) const;

private:
    void init();
    int maxRowWidth( int numColumns ) const;

    class PrivateData;
    PrivateData *d_data;
};

#endif