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/* sparkline_delegate.cpp
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* 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.
*/
#include "sparkline_delegate.h"
#include <QPainter>
#include <QApplication>
#define MIN_WIDTH 10
// XXX - Should we use a style sheet for this?
#define SL_MARGIN 2
void SparkLineDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
QList<int> *points = qvariant_cast<QList<int> *>(index.data(Qt::UserRole));
int max = 1;
int content_w = option.rect.width() - (SL_MARGIN * 2);
int content_h = option.rect.height() - (SL_MARGIN * 2);
int val;
qreal idx = 0.0;
QVector<QPointF> fpoints;
QStyledItemDelegate::paint(painter, option, index);
if (!points || points->isEmpty() || content_w <= 0 || content_h <= 0) {
return;
}
while(points->length() > content_w) {
points->removeFirst();
}
foreach (val, *points) {
if (val > max) max = val;
}
foreach (val, *points) {
fpoints.append(QPointF(idx, (qreal) content_h - (val * content_h / max) ));
idx = idx + 1;
}
QStyleOptionViewItemV4 optv4 = option;
QStyledItemDelegate::initStyleOption(&optv4, index);
painter->save();
if (QApplication::style()->objectName().contains("vista")) {
// QWindowsVistaStyle::drawControl does this internally. Unfortunately there
// doesn't appear to be a more general way to do this.
optv4.palette.setColor(QPalette::All, QPalette::HighlightedText, optv4.palette.color(QPalette::Active, QPalette::Text));
}
QPalette::ColorGroup cg = optv4.state & QStyle::State_Enabled
? QPalette::Normal : QPalette::Disabled;
if (cg == QPalette::Normal && !(optv4.state & QStyle::State_Active))
cg = QPalette::Inactive;
if (optv4.state & QStyle::State_Selected) {
painter->setPen(optv4.palette.color(cg, QPalette::HighlightedText));
} else {
painter->setPen(optv4.palette.color(cg, QPalette::Text));
}
painter->setRenderHint(QPainter::Antialiasing, true);
painter->translate(option.rect.x() + SL_MARGIN + 0.5, option.rect.y() + SL_MARGIN + 0.5);
painter->drawPolyline(QPolygonF(fpoints));
// painter->setPen(Qt::NoPen);
// painter->setBrush(option.palette.foreground());
// painter->drawEllipse(fpoints.first(), 2, 2);
// painter->setBrush(Qt::red);
// painter->drawEllipse(fpoints.last(), 2, 2);
painter->restore();
}
QSize SparkLineDelegate::sizeHint(const QStyleOptionViewItem &option,
const QModelIndex &index) const {
return QSize(MIN_WIDTH, QStyledItemDelegate::sizeHint(option, index).height());
}
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