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/***************************************************************************
* Copyright (C) 2005 by Lorenzo Bettini *
* http://www.lorenzobettini.it *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "brightnesschooserimpl.h"
#include <qprocess.h>
#include <qslider.h>
#include <qlabel.h>
#include <qmessagebox.h>
#include <kdebug.h>
#include <qevent.h>
#include <qregexp.h>
#include "preferences.h"
BrightnessChooserImpl::BrightnessChooserImpl(QWidget *parent, const char *name)
: BrightnessChooser(parent, name), proc(0)
{
updateSlider();
// check whether to restore the previous brightness value
if (Preferences::saveCurrent()) {
kdDebug() << "restore previous brightness value: " <<
Preferences::currentValue() << endl;
setValue(Preferences::currentValue());
}
valueLabel->setText(getValue());
brightnessSlider->setFocus();
}
BrightnessChooserImpl::~BrightnessChooserImpl()
{
// in case save the current brightness setting
if (Preferences::saveCurrent()) {
const QString &val = getValue();
kdDebug() << "save the current brightness value: " << val << endl;
Preferences::setCurrentValue(val);
Preferences::writeConfig();
}
}
void BrightnessChooserImpl::updateSlider()
{
brightnessSlider->setPageStep(QString(Preferences::step()).toInt());
brightnessSlider->setLineStep(QString(Preferences::step()).toInt());
brightnessSlider->setRange(QString(Preferences::minValue()).toInt(),
QString(Preferences::maxValue()).toInt()+1);
valueLabel->setText(getValue());
kdDebug() << "updateSlider" << endl;
kdDebug() << "program: " << Preferences::program() << endl;
kdDebug() << "min value: " << Preferences::minValue() << endl;
kdDebug() << "max value: " << Preferences::maxValue() << endl;
kdDebug() << "page step: " << brightnessSlider->pageStep() << endl;
kdDebug() << "line step: " << brightnessSlider->lineStep() << endl;
}
void BrightnessChooserImpl::updateBrightness()
{
if (proc)
delete proc; // delete the previous instance
proc = new QProcess(this);
QString args = Preferences::setArgument();
args += getValue();
proc->addArgument( Preferences::program() );
proc->addArgument( args );
connect( proc, SIGNAL(readyReadStdout()),
this, SLOT(readFromStdout()) );
connect( proc, SIGNAL(readyReadStderr()),
this, SLOT(readFromStderr()) );
connect( proc, SIGNAL(processExited()),
this, SLOT(procExited()) );
if ( !proc->start() ) {
// error handling
QMessageBox::critical( 0,
tr("Fatal error"),
tr("Could not start the brightness adjustment command."),
tr("Quit") );
}
QString arguments = proc->arguments().join(" ");
qWarning("%s", arguments.ascii());
}
void BrightnessChooserImpl::getBrightness()
{
QString args = Preferences::getArgument();
/* some programs, such as nvclock, do not have a parameter to
get the current brightness; in such case we simply return */
if (args == "") {
kdDebug() << "the program does not support a get brightness functionality" << endl;
return;
}
if (proc)
delete proc; // delete the previous instance
proc = new QProcess(this);
proc->addArgument( Preferences::program() );
proc->addArgument( args );
connect( proc, SIGNAL(readyReadStdout()),
this, SLOT(readValueFromStdout()) );
connect( proc, SIGNAL(readyReadStderr()),
this, SLOT(readFromStderr()) );
connect( proc, SIGNAL(processExited()),
this, SLOT(procExited()) );
if ( !proc->start() ) {
// error handling
QMessageBox::critical( 0,
tr("Fatal error"),
tr("Could not start the brightness adjustment command."),
tr("Quit") );
}
QString arguments = proc->arguments().join(" ");
qWarning("%s", arguments.ascii());
}
void BrightnessChooserImpl::updateValue(int)
{
valueLabel->setText(getValue());
}
void BrightnessChooserImpl::readFromStderr()
{
// Read and process the data.
// Bear in mind that the data might be output in chunks.
QString out = proc->readStderr();
qWarning( "%s", out.ascii() );
}
void BrightnessChooserImpl::readFromStdout()
{
// Read and process the data.
// Bear in mind that the data might be output in chunks.
QString out = proc->readStdout();
qWarning( "%s", out.ascii() );
}
void BrightnessChooserImpl::readValueFromStdout()
{
// Read and process the data.
// Bear in mind that the data might be output in chunks.
QString out = proc->readStdout();
QRegExp regexp("(\\d+)");
if (regexp.search(out) > 0) {
QString result = regexp.cap(1);
kdDebug() << "initial slider value: " << brightnessSlider->value() << endl;
kdDebug() << "captured result: " << result << endl;
brightnessSlider->setValue(brightnessSlider->maxValue() - result.toInt());
kdDebug() << "updated slider value: " << brightnessSlider->value() << endl;
}
qWarning( "%s", out.ascii() );
}
void BrightnessChooserImpl::procExited()
{
qWarning("process terminated");
emit valueUpdated();
}
const QString BrightnessChooserImpl::getValue()
{
return QString::number((brightnessSlider->maxValue() - brightnessSlider->value()));
}
void BrightnessChooserImpl::setValue(const QString &val)
{
int iVal = brightnessSlider->maxValue() - val.toInt();
kdDebug() << "set slider value: " << iVal << endl;
brightnessSlider->setValue(iVal);
updateBrightness();
}
void BrightnessChooserImpl::keyPressEvent(QKeyEvent *event)
{
/* intercept ENTER and simulate the OK button;
also intercept ESC in order to close the parent widget (otherwise
ESC is passed to the applet which seems to close the main panel?)*/
if (event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter) {
kdDebug() << "pressed ENTER" << endl;
updateBrightness();
} else if (event->key() == Qt::Key_Escape) {
kdDebug() << "pressed ESC" << endl;
parentWidget()->close();
} else {
BrightnessChooser::keyPressEvent(event);
}
}
#include "brightnesschooserimpl.moc"
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