2 * QCPUFreq - a simple cpufreq GUI
3 * Copyright (C) 2010 Daniel Klaffenbach <daniel.klaffenbach@cs.tu-chemnitz.de>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include "mainwindow.h"
20 #include "ui_mainwindow.h"
23 #include <QMessageBox>
24 #include <QTextStream>
25 #include <QDesktopWidget>
26 #if defined(Q_WS_MAEMO_5)
27 #include <QMaemo5InformationBox>
31 #define APPNAME "QCPUFreq"
32 #define APPVERSION "0.3"
34 MainWindow::MainWindow(QWidget *parent) :
36 ui(new Ui::MainWindow)
38 //this is a stacked window on Maemo 5
39 #if defined(Q_WS_MAEMO_5)
40 setAttribute(Qt::WA_Maemo5StackedWindow);
47 // enable auto rotation
50 //create a QGraphicsScene for the little chip icon
51 scene = new QGraphicsScene();
54 //create the refresh timer
55 refreshTimer = new QTimer();
56 //refresh UI every 10 seconds
57 refreshTimer->start( 10000 );
59 //create helper process
60 helperProcess = new QProcess;
62 //create a new, stackable help window
63 helpWindow = new HelpWindow( this );
64 #if defined(Q_WS_MAEMO_5)
65 helpWindow->setAttribute(Qt::WA_Maemo5StackedWindow);
67 helpWindow->setWindowFlags( windowFlags() | Qt::Window );
69 //show errors about the sudo setup only once
72 //connect signals and slots
73 connect(ui->actionHelp, SIGNAL(triggered()), this, SLOT(showHelp()));
74 connect( ui->actionAbout, SIGNAL(triggered()), this, SLOT(about()) );
75 connect( ui->freq_adjust, SIGNAL(valueChanged(int)), this, SLOT(adjustFreq()) );
76 connect(QApplication::desktop(), SIGNAL(resized(int)), this, SLOT(orientationChanged()));
77 connect(ui->sr_box, SIGNAL(clicked()), this, SLOT(setSmartReflex()));
78 connect(refreshTimer, SIGNAL(timeout()), this, SLOT(refresh()));
82 MainWindow::~MainWindow()
92 * SLOT: Displays an about box
94 void MainWindow::about()
96 QMessageBox::about(this, APPNAME " " APPVERSION, "<p style=\"align:center;\">© 2010 Daniel Klaffenbach</p>" );
102 * SLOT: Adjusts the maximum CPU frequency according to the scaler
104 void MainWindow::adjustFreq()
106 int newmax = getScalingFreq( ui->freq_adjust->sliderPosition() );
108 max.setNum( newmax );
110 callHelper( "set_maxfreq", max );
117 * Calls the QCPUFreq helper script with "sudo action param"
119 * @param action : the action of the helper script
120 * @param param : the parameter for the action
123 int MainWindow::callHelper(QString action, QString param)
125 QStringList arguments;
127 #if defined(Q_WS_MAEMO_5)
128 //On Maemo 5 the helper script resides in /opt/usr/bin, which us usually not in $PATH
129 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
131 arguments.append( "QCPUFreq.helper" );
134 arguments.append( action );
135 arguments.append( param );
137 helperProcess->start( "sudo", arguments, QIODevice::NotOpen );
139 if ( showSudoError && !helperProcess->waitForFinished( 200 )) {
140 //do not show this error again
141 showSudoError = false;
142 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
145 return helperProcess->exitCode();
150 * Returns the current CPU temperature
152 QString MainWindow::getCPUTemp()
154 #if defined(Q_WS_MAEMO_5)
155 return readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
157 return tr( "Unknown" );
162 * Returns the maximum CPU frequency
164 int MainWindow::getMaxFreq()
166 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
172 * Returns the minimum CPU frequency
174 int MainWindow::getMinFreq()
176 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
182 * Returns the CPU frequency for the specified scaling step
184 int MainWindow::getScalingFreq(int step)
186 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
187 QStringList freqs = tmp.split( " " );
191 if ( step > getScalingSteps() )
192 step = getScalingSteps();
200 * Returns the name of the current CPU frequency scaling governor
202 * \return name of governor
204 QString MainWindow::getScalingGovernor()
206 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
211 * Returns the amount of available scaling steps.
213 int MainWindow::getScalingSteps()
215 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
216 QStringList freqs = tmp.split( " " );
217 return (freqs.size() - 1);
222 * Returns the scaling step for the specified frequency.
224 int MainWindow::getScalingStep( int freq )
226 for( int i = 1; i <= getScalingSteps(); ++i ) {
227 if ( getScalingFreq(i) == freq )
236 * Returns the SmartReflex(tm) state
240 int MainWindow::getSmartReflexState()
242 //SmartReflex is only supprted on Maemo5
243 #if defined(Q_WS_MAEMO_5)
244 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
251 //disable UI checkbox
252 ui->sr_box->setDisabled( true );
260 * Reads any file in /sys/
262 * \param sys_file : full path to sys file - omit "/sys/"
263 * \return content of sys file
265 QString MainWindow::readSysFile(QString sys_file)
267 QFile file( "/sys/"+sys_file );
270 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
271 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
276 QTextStream in( &file );
277 QString txt = in.readLine();
284 * Refreshes all of the values to display
286 void MainWindow::refresh()
288 //get the current frequency and calculate the MHz value
289 int freq = ( getMinFreq() / 1000 );
291 display.setNum( freq );
292 display.append( " MHz" );
293 ui->freq_min->setText( display );
295 //do the same thing for the maximum frequency
296 freq = ( getMaxFreq() / 1000 );
297 display.setNum( freq );
298 display.append( " MHz" );
299 ui->freq_max->setText( display );
301 //display the current governor
302 ui->freq_governor->setText( getScalingGovernor() );
304 //display current temperature
305 ui->cpu_temp->setText( getCPUTemp() );
307 //smart reflex button
308 if ( getSmartReflexState() == 1 )
309 ui->sr_box->setCheckState( Qt::Checked );
311 ui->sr_box->setCheckState( Qt::Unchecked );
314 //display frequency slider
315 ui->freq_adjust->setMinimum( 1 );
316 ui->freq_adjust->setMaximum( getScalingSteps() );
317 ui->freq_adjust->setInvertedAppearance( true );
318 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
320 //ui->retranslateUi(this);
325 * Repaints part of the GUI after the device was rotated
327 void MainWindow::orientationChanged()
331 //check whether we are using portrait or landscape mode
332 if ( usePortrait() ) {
333 //in portrait mode we want to display the large image
334 image.load( ":/img/chip256" );
335 this->scene->clear();
336 this->scene->addPixmap( image );
338 ui->graphicsPortrait->setScene( this->scene );
339 ui->graphicsPortrait->setMaximumSize( 256, 256 );
340 ui->graphicsLandscape->setMaximumSize( 0, 0 );
342 image.load( ":/img/chip128" );
343 this->scene->clear();
344 this->scene->addPixmap( image );
346 ui->graphicsLandscape->setScene( this->scene );
347 ui->graphicsLandscape->setMaximumSize( 128, 128 );
348 ui->graphicsPortrait->setMaximumSize( 0, 0 );
354 * Enables the auto-rotation feature of Maemo5 devices
356 void MainWindow::setAutoRotation()
358 #if defined(Q_WS_MAEMO_5)
359 setAttribute(Qt::WA_Maemo5AutoOrientation, true);
365 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
367 void MainWindow::setSmartReflex()
369 //SmartReflex is only supported on Maemo5
370 #if defined(Q_WS_MAEMO_5)
371 if ( getSmartReflexState() == 1 )
372 callHelper( "set_sr", "off");
374 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), QMaemo5InformationBox::DefaultTimeout);
375 callHelper( "set_sr", "on");
385 * SLOT: display the help window
387 void MainWindow::showHelp()
394 * Returns true when the device is in portrait mode
396 bool MainWindow::usePortrait()
398 QRect screenGeometry = QApplication::desktop()->screenGeometry();
399 if (screenGeometry.width() > screenGeometry.height())