Implement torrent tags editing dialog

PR #18797.

src/gui/flowlayout.cpp

@@ -0,0 +1,195 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2023  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2016  The Qt Company Ltd.
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include "flowlayout.h"
+
+#include <QWidget>
+
+#include "base/global.h"
+
+FlowLayout::FlowLayout(QWidget *parent, const int margin, const int hSpacing, const int vSpacing)
+    : QLayout(parent)
+    , m_hSpace {hSpacing}
+    , m_vSpace {vSpacing}
+{
+    setContentsMargins(margin, margin, margin, margin);
+}
+
+FlowLayout::FlowLayout(const int margin, const int hSpacing, const int vSpacing)
+    : m_hSpace {hSpacing}
+    , m_vSpace {vSpacing}
+{
+    setContentsMargins(margin, margin, margin, margin);
+}
+
+FlowLayout::~FlowLayout()
+{
+    QLayoutItem *item;
+    while ((item = takeAt(0)))
+        delete item;
+}
+
+void FlowLayout::addItem(QLayoutItem *item)
+{
+    m_itemList.append(item);
+}
+
+int FlowLayout::horizontalSpacing() const
+{
+    if (m_hSpace >= 0)
+        return m_hSpace;
+
+    return smartSpacing(QStyle::PM_LayoutHorizontalSpacing);
+}
+
+int FlowLayout::verticalSpacing() const
+{
+    if (m_vSpace >= 0)
+        return m_vSpace;
+
+    return smartSpacing(QStyle::PM_LayoutVerticalSpacing);
+}
+
+int FlowLayout::count() const
+{
+    return m_itemList.size();
+}
+
+QLayoutItem *FlowLayout::itemAt(const int index) const
+{
+    return m_itemList.value(index);
+}
+
+QLayoutItem *FlowLayout::takeAt(const int index)
+{
+    if ((index >= 0) && (index < m_itemList.size()))
+        return m_itemList.takeAt(index);
+
+    return nullptr;
+}
+
+Qt::Orientations FlowLayout::expandingDirections() const
+{
+    return {};
+}
+
+bool FlowLayout::hasHeightForWidth() const
+{
+    return true;
+}
+
+int FlowLayout::heightForWidth(const int width) const
+{
+    const int height = doLayout(QRect(0, 0, width, 0), true);
+    return height;
+}
+
+void FlowLayout::setGeometry(const QRect &rect)
+{
+    QLayout::setGeometry(rect);
+    doLayout(rect, false);
+}
+
+QSize FlowLayout::sizeHint() const
+{
+    return minimumSize();
+}
+
+QSize FlowLayout::minimumSize() const
+{
+    QSize size;
+    for (const QLayoutItem *item : asConst(m_itemList))
+        size = size.expandedTo(item->minimumSize());
+
+    const QMargins margins = contentsMargins();
+    size += QSize(margins.left() + margins.right(), margins.top() + margins.bottom());
+    return size;
+}
+
+int FlowLayout::doLayout(const QRect &rect, const bool testOnly) const
+{
+    int left, top, right, bottom;
+    getContentsMargins(&left, &top, &right, &bottom);
+
+    const QRect effectiveRect = rect.adjusted(+left, +top, -right, -bottom);
+    int x = effectiveRect.x();
+    int y = effectiveRect.y();
+    int lineHeight = 0;
+
+    for (QLayoutItem *item : asConst(m_itemList))
+    {
+        const QWidget *wid = item->widget();
+
+        int spaceX = horizontalSpacing();
+        if (spaceX == -1)
+        {
+            spaceX = wid->style()->layoutSpacing(
+                QSizePolicy::PushButton, QSizePolicy::PushButton, Qt::Horizontal);
+        }
+
+        int spaceY = verticalSpacing();
+        if (spaceY == -1)
+        {
+            spaceY = wid->style()->layoutSpacing(
+                QSizePolicy::PushButton, QSizePolicy::PushButton, Qt::Vertical);
+        }
+
+        int nextX = x + item->sizeHint().width() + spaceX;
+        if (((nextX - spaceX) > effectiveRect.right()) && (lineHeight > 0))
+        {
+            x = effectiveRect.x();
+            y = y + lineHeight + spaceY;
+            nextX = x + item->sizeHint().width() + spaceX;
+            lineHeight = 0;
+        }
+
+        if (!testOnly)
+            item->setGeometry(QRect(QPoint(x, y), item->sizeHint()));
+
+        x = nextX;
+        lineHeight = std::max(lineHeight, item->sizeHint().height());
+    }
+
+    return y + lineHeight - rect.y() + bottom;
+}
+
+int FlowLayout::smartSpacing(const QStyle::PixelMetric pm) const
+{
+    QObject *parent = this->parent();
+    if (!parent)
+        return -1;
+
+    if (parent->isWidgetType())
+    {
+        auto *pw = static_cast<QWidget *>(parent);
+        return pw->style()->pixelMetric(pm, nullptr, pw);
+    }
+
+    return static_cast<QLayout *>(parent)->spacing();
+}