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/** @file
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef PERCENTBARDELEGATE_H
#define PERCENTBARDELEGATE_H
/*
* @file Percent bar delegate.
*
* QStyledItemDelegate subclass that will draw a percentage value and a
* single-item bar chart for the specified value.
*
* This is intended to be used in QTreeWidgets to show percentage values.
* To use it, first call setItemDelegate:
*
* myTreeWidget()->setItemDelegateForColumn(col_pct_, new PercentBarDelegate());
*
* Then, for each QTreeWidgetItem, set a double value using setData:
*
* setData(col_pct_, Qt::UserRole, QVariant::fromValue<double>(packets_ * 100.0 / num_packets));
*
* If the item data cannot be converted to a valid double value or if its
* text string is non-empty then it will be rendered normally (i.e. the
* percent text and bar will not be drawn). This lets you mix normal and
* percent bar rendering between rows.
*/
#include <QStyledItemDelegate>
class PercentBarDelegate : public QStyledItemDelegate
{
public:
PercentBarDelegate(QWidget *parent = 0) : QStyledItemDelegate(parent) { }
// Make sure QStyledItemDelegate::paint doesn't draw any text.
virtual QString displayText(const QVariant &, const QLocale &) const { return QString(); }
protected:
void paint(QPainter *painter, const QStyleOptionViewItem &option,
const QModelIndex &index) const;
QSize sizeHint(const QStyleOptionViewItem &option,
const QModelIndex &index) const;
};
#endif // PERCENTBARDELEGATE_H
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