ControlLayout.h

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/*
 * ControlLayout.h - layout for controls
 *
 * Copyright (c) 2019-2019 Johannes Lorenz <j.git$$$lorenz-ho.me, $$$=@>
 *
 * This file is part of LMMS - https://lmms.io
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */
 
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#ifndef LMMS_GUI_CONTROL_LAYOUT_H
#define LMMS_GUI_CONTROL_LAYOUT_H
 
#include <QLayout>
#include <QMultiMap>
#include <QStyle>
 
class QLayoutItem;
class QLineEdit;
 
 
namespace lmms::gui
{

class ControlLayout : public QLayout
{
        Q_OBJECT
 
        using ControlLayoutMap = QMap<QString, QLayoutItem*>;
 
public:
        explicit ControlLayout(QWidget *parent,
                int margin = -1, int hSpacing = -1, int vSpacing = -1);
        ~ControlLayout() override;
 
        void addItem(QLayoutItem *item) override;
        int horizontalSpacing() const;
        int verticalSpacing() const;
        Qt::Orientations expandingDirections() const override;
        bool hasHeightForWidth() const override;
        int heightForWidth(int) const override;
        int count() const override;
        QLayoutItem *itemAt(int index) const override;
        QLayoutItem *itemByString(const QString& key) const;
        QSize minimumSize() const override;
        void setGeometry(const QRect &rect) override;
        QSize sizeHint() const override;
        QLayoutItem *takeAt(int index) override;
        void removeFocusFromSearchBar();
 
private slots:
        void onTextChanged(const QString&);
 
private:
        int doLayout(const QRect &rect, bool testOnly) const;
        int smartSpacing(QStyle::PixelMetric pm) const;
        ControlLayoutMap::const_iterator pairAt(int index) const;
 
        ControlLayoutMap m_itemMap;
        int m_hSpace;
        int m_vSpace;
        // relevant dimension is width, as later, heightForWidth() will be called
        // 400 looks good and is ~4 knobs in a row
        constexpr const static int m_minWidth = 400;
        QLineEdit* m_searchBar;
        static constexpr const char* s_searchBarName = "!!searchBar!!";
};
 
} // namespace lmms::gui
 
#endif // LMMS_GUI_CONTROL_LAYOUT_H