forked from osmocom/wireshark
80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/* percent_bar_delegate.h
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef PERCENTBARDELEGATE_H
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#define PERCENTBARDELEGATE_H
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/*
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* @file Percent bar delegate.
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*
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* QStyledItemDelegate subclass that will draw a percentage value and a
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* single-item bar chart for the specified value.
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*
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* This is intended to be used in QTreeWidgets to show percentage values.
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* To use it, first call setItemDelegate:
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*
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* myTreeWidget()->setItemDelegateForColumn(col_pct_, new PercentBarDelegate());
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*
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* Then, for each QTreeWidgetItem, set a double value using setData:
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*
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* setData(col_pct_, Qt::UserRole, QVariant::fromValue<double>(packets_ * 100.0 / num_packets));
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*
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* If the item data cannot be converted to a valid double value or if its
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* text string is non-empty then it will be rendered normally (i.e. the
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* percent text and bar will not be drawn). This lets you mix normal and
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* percent bar rendering between rows.
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*/
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#include <QStyledItemDelegate>
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class PercentBarDelegate : public QStyledItemDelegate
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{
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Q_OBJECT
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public:
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PercentBarDelegate(QWidget *parent = 0) : QStyledItemDelegate(parent) { }
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// Make sure QStyledItemDelegate::paint doesn't draw any text.
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virtual QString displayText(const QVariant &, const QLocale &) const { return QString(); }
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protected:
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void paint(QPainter *painter, const QStyleOptionViewItem &option,
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const QModelIndex &index) const;
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QSize sizeHint(const QStyleOptionViewItem &option,
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const QModelIndex &index) const;
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};
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#endif // PERCENTBARDELEGATE_H
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/*
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* Editor modelines
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*
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* Local Variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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