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 "0.2"
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()));
81 MainWindow::~MainWindow()
91 * SLOT: Displays an about box
93 void MainWindow::about()
95 QMessageBox::about(this, APPNAME " " APPVERSION, "<p style=\"align:center;\">© 2010 Daniel Klaffenbach</p>" );
101 * SLOT: Adjusts the maximum CPU frequency according to the scaler
103 void MainWindow::adjustFreq()
105 int newmax = getScalingFreq( ui->freq_adjust->sliderPosition() );
107 max.setNum( newmax );
109 callHelper( "set_maxfreq", max );
116 * Calls the QCPUFreq helper script with "sudo action param"
118 * @param action : the action of the helper script
119 * @param param : the parameter for the action
122 int MainWindow::callHelper(QString action, QString param)
124 QStringList arguments;
126 #if defined(Q_WS_MAEMO_5)
127 //On Maemo 5 the helper script resides in /opt/usr/bin, which us usually not in $PATH
128 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
130 arguments.append( "QCPUFreq.helper" );
133 arguments.append( action );
134 arguments.append( param );
136 helperProcess->start( "sudo", arguments, QIODevice::NotOpen );
138 if ( showSudoError && !helperProcess->waitForFinished( 200 )) {
139 //do not show this error again
140 showSudoError = false;
141 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
144 return helperProcess->exitCode();
149 * Returns the current CPU temperature
151 QString MainWindow::getCPUTemp()
153 #if defined(Q_WS_MAEMO_5)
154 return readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
156 return tr( "Unknown" );
161 * Returns the maximum CPU frequency
163 int MainWindow::getMaxFreq()
165 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
171 * Returns the minimum CPU frequency
173 int MainWindow::getMinFreq()
175 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
181 * Returns the CPU frequency for the specified scaling step
183 int MainWindow::getScalingFreq(int step)
185 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
186 QStringList freqs = tmp.split( " " );
190 if ( step > getScalingSteps() )
191 step = getScalingSteps();
199 * Returns the name of the current CPU frequency scaling governor
201 * \return name of governor
203 QString MainWindow::getScalingGovernor()
205 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
210 * Returns the amount of available scaling steps.
212 int MainWindow::getScalingSteps()
214 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
215 QStringList freqs = tmp.split( " " );
216 return (freqs.size() - 1);
221 * Returns the scaling step for the specified frequency.
223 int MainWindow::getScalingStep( int freq )
225 for( int i = 1; i <= getScalingSteps(); ++i ) {
226 if ( getScalingFreq(i) == freq )
235 * Returns the SmartReflex(tm) state
239 int MainWindow::getSmartReflexState()
241 //SmartReflex is only supprted on Maemo5
242 #if defined(Q_WS_MAEMO_5)
243 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
250 //disable UI checkbox
251 ui->sr_box->setDisabled( true );
259 * Reads any file in /sys/
261 * \param sys_file : full path to sys file - omit "/sys/"
262 * \return content of sys file
264 QString MainWindow::readSysFile(QString sys_file)
266 QFile file( "/sys/"+sys_file );
269 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
270 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
275 QTextStream in( &file );
276 QString txt = in.readLine();
283 * Refreshes all of the values to display
285 void MainWindow::refresh()
287 //get the current frequency and calculate the MHz value
288 int freq = ( getMinFreq() / 1000 );
290 display.setNum( freq );
291 display.append( " MHz" );
292 ui->freq_min->setText( display );
294 //do the same thing for the maximum frequency
295 freq = ( getMaxFreq() / 1000 );
296 display.setNum( freq );
297 display.append( " MHz" );
298 ui->freq_max->setText( display );
300 //display the current governor
301 ui->freq_governor->setText( getScalingGovernor() );
303 //display current temperature
304 ui->cpu_temp->setText( getCPUTemp() );
306 //smart reflex button
307 if ( getSmartReflexState() == 1 )
308 ui->sr_box->setCheckState( Qt::Checked );
310 ui->sr_box->setCheckState( Qt::Unchecked );
313 //display frequency slider
314 ui->freq_adjust->setMinimum( 1 );
315 ui->freq_adjust->setMaximum( getScalingSteps() );
316 ui->freq_adjust->setInvertedAppearance( true );
317 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
319 //ui->retranslateUi(this);
324 * Repaints part of the GUI after the device was rotated
326 void MainWindow::orientationChanged()
330 //check whether we are using portrait or landscape mode
331 if ( usePortrait() ) {
332 //in portrait mode we want to display the large image
333 image.load( ":/img/chip256" );
334 this->scene->clear();
335 this->scene->addPixmap( image );
337 ui->graphicsPortrait->setScene( this->scene );
338 ui->graphicsPortrait->setMaximumSize( 256, 256 );
339 ui->graphicsLandscape->setMaximumSize( 0, 0 );
341 image.load( ":/img/chip128" );
342 this->scene->clear();
343 this->scene->addPixmap( image );
345 ui->graphicsLandscape->setScene( this->scene );
346 ui->graphicsLandscape->setMaximumSize( 128, 128 );
347 ui->graphicsPortrait->setMaximumSize( 0, 0 );
353 * Enables the auto-rotation feature of Maemo5 devices
355 void MainWindow::setAutoRotation()
357 #if defined(Q_WS_MAEMO_5)
358 setAttribute(Qt::WA_Maemo5AutoOrientation, true);
364 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
366 void MainWindow::setSmartReflex()
368 //SmartReflex is only supported on Maemo5
369 #if defined(Q_WS_MAEMO_5)
370 if ( getSmartReflexState() == 1 )
371 callHelper( "set_sr", "off");
373 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), QMaemo5InformationBox::DefaultTimeout);
374 callHelper( "set_sr", "on");
384 * SLOT: display the help window
386 void MainWindow::showHelp()
393 * Returns true when the device is in portrait mode
395 bool MainWindow::usePortrait()
397 QRect screenGeometry = QApplication::desktop()->screenGeometry();
398 if (screenGeometry.width() > screenGeometry.height())