source: trunk/src/gui/widgets/qmdiarea_p.h@ 324

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#ifndef QMDIAREA_P_H
#define QMDIAREA_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "qmdiarea.h"
#include "qmdisubwindow.h"

#ifndef QT_NO_MDIAREA

#include <QList>
#include <QRect>
#include <QPoint>
#include <QtGui/qapplication.h>
#include <private/qmdisubwindow_p.h>
#include <private/qabstractscrollarea_p.h>

QT_BEGIN_NAMESPACE

namespace QMdi {
class Rearranger
{
public:
    enum Type {
        RegularTiler,
        SimpleCascader,
        IconTiler
    };

    // Rearranges widgets relative to domain.
    virtual void rearrange(QList<QWidget *> &widgets, const QRect &domain) const = 0;
    virtual Type type() const = 0;
    virtual ~Rearranger() {}
};

class RegularTiler : public Rearranger
{
    // Rearranges widgets according to a regular tiling pattern
    // covering the entire domain.
    // Both positions and sizes may change.
    void rearrange(QList<QWidget *> &widgets, const QRect &domain) const;
    inline Type type() const { return Rearranger::RegularTiler; }
};

class SimpleCascader : public Rearranger
{
    // Rearranges widgets according to a simple, regular cascading pattern.
    // Widgets are resized to minimumSize.
    // Both positions and sizes may change.
    void rearrange(QList<QWidget *> &widgets, const QRect &domain) const;
    inline Type type() const { return Rearranger::SimpleCascader; }
};

class IconTiler : public Rearranger
{
    // Rearranges icons (assumed to be the same size) according to a regular
    // tiling pattern filling up the domain from the bottom.
    // Only positions may change.
    void rearrange(QList<QWidget *> &widgets, const QRect &domain) const;
    inline Type type() const { return Rearranger::IconTiler; }
};

class Placer
{
public:
    // Places the rectangle defined by 'size' relative to 'rects' and 'domain'.
    // Returns the position of the resulting rectangle.
    virtual QPoint place(
        const QSize &size, const QList<QRect> &rects, const QRect &domain) const = 0;
    virtual ~Placer() {}
};

class MinOverlapPlacer : public Placer
{
    QPoint place(const QSize &size, const QList<QRect> &rects, const QRect &domain) const;
    static int accumulatedOverlap(const QRect &source, const QList<QRect> &rects);
    static QRect findMinOverlapRect(const QList<QRect> &source, const QList<QRect> &rects);
    static void getCandidatePlacements(