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/*
 * Copyright (c) 2014-2016 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#pragma once

#include <QGridLayout>
#include <QHash>
#include <QPoint>
#include <QSize>
#include <QString>
#include <QWidget>

namespace Swift {
    class QtTabbable;
    class QtTabWidget;

    class QtDynamicGridLayout : public QWidget {
        Q_OBJECT
    public:
        explicit QtDynamicGridLayout(QWidget* parent = nullptr, bool enableDND = false);
        virtual ~QtDynamicGridLayout();

        QSize getDimension() const;

        // emulate QtTabWidget API
        int addTab(QtTabbable* tab, const QString& title);
        void removeTab(int index);
        int count() const;

        QWidget* widget(int index) const;
        QWidget* currentWidget() const;
        void setCurrentWidget(QWidget* widget);

        QtTabWidget* indexToTabWidget(int index, int& tabIndex);

        int indexOf(const QWidget* widget) const;
        int currentIndex() const;
        void setCurrentIndex(int index);

        bool isDNDEnabled() const;

        QHash<QString, QPoint> getTabPositions() const;
        void setTabPositions(const QHash<QString, QPoint> positions);

        bool eventFilter(QObject* object, QEvent* event);

    signals:
        void tabCloseRequested(int index);
        void onCurrentIndexChanged(int newIndex);

    public slots:
        void setDimensions(const QSize& dim);

        // Tab Management
        void moveCurrentTabRight();
        void moveCurrentTabLeft();
        void moveCurrentTabToNextGroup();
        void moveCurrentTabToPreviousGroup();

        void updateTabPositions();

    private slots:
        void handleTabCloseRequested(int index);
        void handleTabCurrentChanged(int index);
        void handleApplicationFocusChanged(QWidget* oldFocus, QWidget* newFocus);

    private:
        void moveTab(QtTabWidget* tabWidget, int oldIndex, int newIndex);
        QtTabWidget* createDNDTabWidget(QWidget* parent);

    private:
        QGridLayout *gridLayout_;
        bool dndEnabled_;
        QHash<QString, QPoint> tabPositions_;
        QtTabbable* movingTab_;
    };
}