hostap/wpa_supplicant/wpa_gui-qt4/signalbar.cpp
Kel Modderman ef992bbd3b wpa_gui-qt4: Improve scan results signal display
Display signal strength in dBm with visual indicator in the form of a
bar for scan results displayed by wpa_gui-qt4. Any signal > -35dBm is
treated as full signal bar, signals between range of -95<->-35dBm are
displayed linearly. Convert WEXT signal level value to scale that
nl80211 typically reports in dBm. The condition which differentiates
8-bit WEXT dBm and regular dBm is probably fragile, but there is
currently no way to know what the driver is going to report for signal
strength.

Signed-off-by: Kel Modderman <kel@otaku42.de>
2011-11-19 20:10:37 +02:00

64 lines
1.3 KiB
C++

/*
* wpa_gui - SignalBar class
* Copyright (c) 2011, Kel Modderman <kel@otaku42.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include <cstdio>
#include <qapplication.h>
#include "signalbar.h"
SignalBar::SignalBar(QObject *parent)
: QStyledItemDelegate(parent)
{
}
SignalBar::~SignalBar()
{
}
void SignalBar::paint(QPainter *painter,
const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
QStyleOptionProgressBar opts;
int signal;
if (index.column() != 3) {
QStyledItemDelegate::paint(painter, option, index);
return;
}
if (index.data().toInt() > 0)
signal = 0 - (256 - index.data().toInt());
else
signal = index.data().toInt();
opts.minimum = -95;
opts.maximum = -35;
if (signal < opts.minimum)
opts.progress = opts.minimum;
else if (signal > opts.maximum)
opts.progress = opts.maximum;
else
opts.progress = signal;
opts.text = QString::number(signal) + " dBm";
opts.textVisible = true;
opts.rect = option.rect;
QApplication::style()->drawControl(QStyle::CE_ProgressBar,
&opts, painter);
}