src/gui/flowlayout.h

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2023  Vladimir Golovnev <glassez@yandex.ru>
   4  * Copyright (C) 2016  The Qt Company Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19  *
  20  * In addition, as a special exception, the copyright holders give permission to
  21  * link this program with the OpenSSL project's "OpenSSL" library (or with
  22  * modified versions of it that use the same license as the "OpenSSL" library),
  23  * and distribute the linked executables. You must obey the GNU General Public
  24  * License in all respects for all of the code used other than "OpenSSL".  If you
  25  * modify file(s), you may extend this exception to your version of the file(s),
  26  * but you are not obligated to do so. If you do not wish to do so, delete this
  27  * exception statement from your version.
  28  */
  29
  30 #pragma once
  31
  32 #include <QLayout>
  33 #include <QRect>
  34 #include <QStyle>
  35
  36 class FlowLayout final : public QLayout
  37 {
  38 public:
  39     explicit FlowLayout(QWidget *parent, int margin = -1, int hSpacing = -1, int vSpacing = -1);
  40     explicit FlowLayout(int margin = -1, int hSpacing = -1, int vSpacing = -1);
  41     ~FlowLayout() override;
  42
  43     void addItem(QLayoutItem *item) override;
  44     int horizontalSpacing() const;
  45     int verticalSpacing() const;
  46     Qt::Orientations expandingDirections() const override;
  47     bool hasHeightForWidth() const override;
  48     int heightForWidth(int) const override;
  49     int count() const override;
  50     QLayoutItem *itemAt(int index) const override;
  51     QSize minimumSize() const override;
  52     void setGeometry(const QRect &rect) override;
  53     QSize sizeHint() const override;
  54     QLayoutItem *takeAt(int index) override;
  55
  56 private:
  57     int doLayout(const QRect &rect, bool testOnly) const;
  58     int smartSpacing(QStyle::PixelMetric pm) const;
  59     void applyItemsGeometry(const QHash<QLayoutItem *, QPoint> &items, int lineHeight) const;
  60
  61     QList<QLayoutItem *> m_itemList;
  62     int m_hSpace;
  63     int m_vSpace;
  64 };