// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#ifndef LAYOUTDECORATION_H
#define LAYOUTDECORATION_H

#include <QtDesigner/extension.h>

#include <QtCore/qobject.h>
#include <QtCore/qpair.h>

QT_BEGIN_NAMESPACE

class QPoint;
class QLayoutItem;
class QWidget;
class QRect;
class QLayout;

class QDesignerLayoutDecorationExtension
{
public:
    Q_DISABLE_COPY_MOVE(QDesignerLayoutDecorationExtension)

    enum InsertMode
    {
        InsertWidgetMode,
        InsertRowMode,
        InsertColumnMode
    };

    QDesignerLayoutDecorationExtension() = default;
    virtual ~QDesignerLayoutDecorationExtension() = default;

    virtual QList<QWidget*> widgets(QLayout *layout) const = 0;

    virtual QRect itemInfo(int index) const = 0;
    virtual int indexOf(QWidget *widget) const = 0;
    virtual int indexOf(QLayoutItem *item) const = 0;

    virtual InsertMode currentInsertMode() const = 0;
    virtual int currentIndex() const = 0;
    virtual QPair<int, int> currentCell() const = 0;
    virtual void insertWidget(QWidget *widget, const QPair<int, int> &cell) = 0;
    virtual void removeWidget(QWidget *widget) = 0;

    virtual void insertRow(int row) = 0;
    virtual void insertColumn(int column) = 0;
    virtual void simplify() = 0;

    virtual int findItemAt(const QPoint &pos) const = 0;
    virtual int findItemAt(int row, int column) const = 0; // atm only for grid.

    virtual void adjustIndicator(const QPoint &pos, int index) = 0;
};
Q_DECLARE_EXTENSION_INTERFACE(QDesignerLayoutDecorationExtension, "org.qt-project.Qt.Designer.LayoutDecoration")

QT_END_NAMESPACE

#endif // LAYOUTDECORATION_H