volume control

[masuk]

i tried this

#include "form1.h"
#include "ui_form1.h"
 
#include <phonon/AudioOutput>
#include <phonon/MediaObject>
#include <phonon/VolumeSlider>
 
Form1::Form1(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Form1)
{
    ui->setupUi(this);
 
   connect(ui->horizontalSlider,SIGNAL(sliderMoved(int)),this,SLOT(setAudioOutput()));  
 
   Phonon::MediaObject *mediaObject = new Phonon::MediaObject(this);
   Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory);
   Phonon::createPath(mediaObject, audioOutput);
 
   Phonon::VolumeSlider *volumeSlider = new Phonon::VolumeSlider;
   volumeSlider->setAudioOutput(audioOutput);
}

#include "form1.h"
#include "ui_form1.h"

#include <phonon/AudioOutput>
#include <phonon/MediaObject>
#include <phonon/VolumeSlider>

Form1::Form1(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Form1)
{
    ui->setupUi(this);
  
   connect(ui->horizontalSlider,SIGNAL(sliderMoved(int)),this,SLOT(setAudioOutput()));  

   Phonon::MediaObject *mediaObject = new Phonon::MediaObject(this);
   Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory);
   Phonon::createPath(mediaObject, audioOutput);

   Phonon::VolumeSlider *volumeSlider = new Phonon::VolumeSlider;
   volumeSlider->setAudioOutput(audioOutput);
}

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but showing these errors:

cpp:59: undefined reference to `_imp___ZN6Phonon11MediaObjectC1EP7QObject'
 
cpp:60: undefined reference to `_imp___ZN6Phonon11AudioOutputC1ENS_8CategoryEP7QObject'
 
cpp:61: undefined reference to `_imp___ZN6Phonon10createPathEPNS_9MediaNodeES1_'
 
cpp:61: undefined reference to `_imp___ZN6Phonon4PathD1Ev'
 
cpp:63: undefined reference to `_imp___ZN6Phonon12VolumeSliderC1EP7QWidget'
 
cpp:64: undefined reference to `_imp___ZN6Phonon12VolumeSlider14setAudioOutputEPNS_11AudioOutputE'
 
cpp:59: undefined reference to `_imp___ZN6Phonon11MediaObjectC1EP7QObject'
 
cpp:60: undefined reference to `_imp___ZN6Phonon11AudioOutputC1ENS_8CategoryEP7QObject'
 
cpp:61: undefined reference to `_imp___ZN6Phonon10createPathEPNS_9MediaNodeES1_'
 
cpp:61: undefined reference to `_imp___ZN6Phonon4PathD1Ev'
 
cpp:63: undefined reference to `_imp___ZN6Phonon12VolumeSliderC1EP7QWidget'
 
cpp:64: undefined reference to `_imp___ZN6Phonon12VolumeSlider14setAudioOutputEPNS_11AudioOutputE'
 
collect2: ld returned 1 exit status

cpp:59: undefined reference to `_imp___ZN6Phonon11MediaObjectC1EP7QObject'

cpp:60: undefined reference to `_imp___ZN6Phonon11AudioOutputC1ENS_8CategoryEP7QObject'

cpp:61: undefined reference to `_imp___ZN6Phonon10createPathEPNS_9MediaNodeES1_'

cpp:61: undefined reference to `_imp___ZN6Phonon4PathD1Ev'

cpp:63: undefined reference to `_imp___ZN6Phonon12VolumeSliderC1EP7QWidget'

cpp:64: undefined reference to `_imp___ZN6Phonon12VolumeSlider14setAudioOutputEPNS_11AudioOutputE'

cpp:59: undefined reference to `_imp___ZN6Phonon11MediaObjectC1EP7QObject'

cpp:60: undefined reference to `_imp___ZN6Phonon11AudioOutputC1ENS_8CategoryEP7QObject'

cpp:61: undefined reference to `_imp___ZN6Phonon10createPathEPNS_9MediaNodeES1_'

cpp:61: undefined reference to `_imp___ZN6Phonon4PathD1Ev'

cpp:63: undefined reference to `_imp___ZN6Phonon12VolumeSliderC1EP7QWidget'

cpp:64: undefined reference to `_imp___ZN6Phonon12VolumeSlider14setAudioOutputEPNS_11AudioOutputE'

collect2: ld returned 1 exit status

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Is possible to solve in this way?

thanks

[nish]

did you made changes to your .pro file to link to phonon?

[masuk]

hi
thanks nish.
after link to phonon there is no error. but i can not solve my problem means when i moved slider(horizontal slider) it does not change the volume level of "windows volume control"

thanks

[squidge]

That is correct, phonon only changes the volume control of application. To change the system volume control, it is more difficult and requires WinAPI.

[masuk]

i tried this

#include "form1.h"
#include "ui_form1.h"
 
#include <phonon/AudioOutput>
#include <phonon/MediaObject>
#include <phonon/VolumeSlider>
#include <QLibrary>
#include <windows.h>
 
Form1::Form1(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Form1)
{
    ui->setupUi(this);
    QLibrary myLib("C:/Windows/System32/MMSYSTEM.DLL");
 
   myLib.load();
 
   if (myLib.isLoaded())
   {
   connect(ui->horizontalSlider,SIGNAL(sliderMoved(int)),this,SLOT(setAudioOutput()));
   }
 
   //Phonon::MediaObject *mediaObject = new Phonon::MediaObject(this);
   //Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory);
   //Phonon::createPath(mediaObject, audioOutput);
   //mediaObject->setCurrentSource(Phonon::MediaSource("C:/Windows/Suiystem32/MMSYSTEM.DLL"));
   //Phonon::VolumeSlider *volumeSlider = new Phonon::VolumeSlider;
   //volumeSlider->setAudioOutput(audioOutput); 
}
 
void Form1::showForm2()   //<----error show here
{
    Form2 *frm2  = new Form2;  //<----error show here
    frm2->show();     //<----error show here
}

#include "form1.h"
#include "ui_form1.h"

#include <phonon/AudioOutput>
#include <phonon/MediaObject>
#include <phonon/VolumeSlider>
#include <QLibrary>
#include <windows.h>

Form1::Form1(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Form1)
{
    ui->setupUi(this);
    QLibrary myLib("C:/Windows/System32/MMSYSTEM.DLL");

   myLib.load();

   if (myLib.isLoaded())
   {
   connect(ui->horizontalSlider,SIGNAL(sliderMoved(int)),this,SLOT(setAudioOutput()));
   }

   //Phonon::MediaObject *mediaObject = new Phonon::MediaObject(this);
   //Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory);
   //Phonon::createPath(mediaObject, audioOutput);
   //mediaObject->setCurrentSource(Phonon::MediaSource("C:/Windows/Suiystem32/MMSYSTEM.DLL"));
   //Phonon::VolumeSlider *volumeSlider = new Phonon::VolumeSlider;
   //volumeSlider->setAudioOutput(audioOutput); 
}

void Form1::showForm2()   //<----error show here
{
    Form2 *frm2  = new Form2;  //<----error show here
    frm2->show();     //<----error show here
}

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As phonon only changes the volume control of application so i comments those lines.

But when use #include<windows.h> these errors shown:

form1.cpp: In member function 'void Form1::showForm2()':
 
form1.cpp:182: error: expected unqualified-id before numeric constant
 
form1.cpp:182: error: expected initializer before numeric constant
 
form1.cpp:183: error: base operand of '->' is not a pointer

form1.cpp: In member function 'void Form1::showForm2()':

form1.cpp:182: error: expected unqualified-id before numeric constant

form1.cpp:182: error: expected initializer before numeric constant

form1.cpp:183: error: base operand of '->' is not a pointer

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this is .pro file

QT       += core gui
QT       += phonon
 
LIBS += -luser32 -lshell32 -lgdi32     
 
TARGET = untitled2
TEMPLATE = app
 
 
SOURCES += main.cpp\
        mainwindow.cpp \
    form1.cpp 
 
HEADERS  += mainwindow.h \
    form1.h 
 
FORMS    += mainwindow.ui \
    form1.ui

QT       += core gui
QT       += phonon

LIBS += -luser32 -lshell32 -lgdi32     

TARGET = untitled2
TEMPLATE = app


SOURCES += main.cpp\
        mainwindow.cpp \
    form1.cpp 

HEADERS  += mainwindow.h \
    form1.h 

FORMS    += mainwindow.ui \
    form1.ui

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my problem is not solved."is the signal and slot is right that i used for horizontal slider" and "is the selected .dll is right to solve my problem"?

thanks

[squidge]

Where is Form2 defined?

[masuk]

Hi squidge

actually in my program i defined #include "form2.h" but in post that missed.

#include "form1.h"
#include "ui_form1.h"
#include "form2.h"
#include <phonon/AudioOutput>
#include <phonon/MediaObject>
#include <phonon/VolumeSlider>
#include <QLibrary>
#include <windows.h>
 
Form1::Form1(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Form1)
{
    ui->setupUi(this);
    QLibrary myLib("C:/Windows/System32/MMSYSTEM.DLL");
 
   myLib.load();
 
   if (myLib.isLoaded())
   {
   connect(ui->horizontalSlider,SIGNAL(sliderMoved(int)),this,SLOT(setAudioOutput()));
   }
 
   //Phonon::MediaObject *mediaObject = new Phonon::MediaObject(this);
   //Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory);
   //Phonon::createPath(mediaObject, audioOutput);
   //mediaObject->setCurrentSource(Phonon::MediaSource("C:/Windows/Suiystem32/MMSYSTEM.DLL"));
   //Phonon::VolumeSlider *volumeSlider = new Phonon::VolumeSlider;
   //volumeSlider->setAudioOutput(audioOutput); 
}
 
void Form1::showForm2()   //<----error show here
{
    Form2 *frm2  = new Form2;  //<----error show here
    frm2->show();     //<----error show here
}

#include "form1.h"
#include "ui_form1.h"
#include "form2.h"
#include <phonon/AudioOutput>
#include <phonon/MediaObject>
#include <phonon/VolumeSlider>
#include <QLibrary>
#include <windows.h>

Form1::Form1(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Form1)
{
    ui->setupUi(this);
    QLibrary myLib("C:/Windows/System32/MMSYSTEM.DLL");

   myLib.load();

   if (myLib.isLoaded())
   {
   connect(ui->horizontalSlider,SIGNAL(sliderMoved(int)),this,SLOT(setAudioOutput()));
   }

   //Phonon::MediaObject *mediaObject = new Phonon::MediaObject(this);
   //Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory);
   //Phonon::createPath(mediaObject, audioOutput);
   //mediaObject->setCurrentSource(Phonon::MediaSource("C:/Windows/Suiystem32/MMSYSTEM.DLL"));
   //Phonon::VolumeSlider *volumeSlider = new Phonon::VolumeSlider;
   //volumeSlider->setAudioOutput(audioOutput); 
}

void Form1::showForm2()   //<----error show here
{
    Form2 *frm2  = new Form2;  //<----error show here
    frm2->show();     //<----error show here
}

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but my problem is not solved.....

thanks

[squidge]

Ok, I'm confused. The error is on line 182, but there are only 36 lines in your post.

Secondly, what is content of Form2.h ?

[masuk]

hi
i only posted the reqired code. this is my full code:
form1.cpp

#include "form1.h"
#include "ui_form1.h"
 
#include "form2.h"  
 
#include <QPixmap>
#include <QPalette>
#include <QDesktopWidget>
#include <QRect>
#include <QSize>
#include <QApplication>
 
//#include <QIcon>
 
#include <QMouseEvent>  
 
 
#include <phonon/MediaObject>
#include <phonon/AudioOutput>
#include <phonon/VolumeSlider>
#include <QLibrary>
#include <windows.h>
 
Form1::Form1(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Form1)
{
    ui->setupUi(this);
 
    connect(ui->pushButton_24,SIGNAL(clicked()),this,SLOT(showMinimized()));  
 
    // These three line is used for remove 'window title bar'
   this->setWindowFlags(Qt::MSWindowsFixedSizeDialogHint);  
   this->setWindowFlags(Qt::CustomizeWindowHint);          
   this->setWindowFlags(Qt::FramelessWindowHint);         
 
 
   //this->setWindowFlags(Qt::SplashScreen);  
 
   //background image using 'pixmap' and 'palette'
   this->setFixedSize(270,350);
 
   QPixmap pixmap1("E:/workplace/image/two.JPG");
   QPalette p = palette();
 
   //resize image if it is larger than screen size.
   QDesktopWidget* desktopWidget = QApplication::desktop();
   QRect rect = desktopWidget->availableGeometry();
 
   QSize size(rect.width() , rect.height());
   //resize as per your requirement..
   //QPixmap pixmap(pixmap1.scaled(size));
   QPixmap pixmap(pixmap1.scaled(270,350));
 
   p.setBrush(QPalette::Background,  pixmap);
   setPalette(p);
 
   //ui->pushButton->setIcon(QIcon("E:/workplace/image/01.gif"));
 
 
  //connect(ui->horizontalSlider,SIGNAL(volumeChanged(Phonon::MediaObject,Phonon::AudioOutput)),
           //this,SLOT(setVolumeDecibel(Phonon::MediaObject,Phonon::AudioOutput)));
 
 
   QLibrary myLib("C:/Windows/System32/MMSYSTEM.DLL");
 
   myLib.load();
 
   if (myLib.isLoaded())
   {
   connect(ui->horizontalSlider,SIGNAL(sliderMoved(int)),this,SLOT(setAudioOutput()));
   }
 
   //Phonon::MediaObject *mediaObject = new Phonon::MediaObject(this);
   //Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory);
   //Phonon::createPath(mediaObject, audioOutput);
   //mediaObject->setCurrentSource(Phonon::MediaSource("C:/Windows/Suiystem32/MMSYSTEM.DLL"));
   //Phonon::VolumeSlider *volumeSlider = new Phonon::VolumeSlider;
   //volumeSlider->setAudioOutput(audioOutput);
 
}
 
Form1::~Form1()
{
    delete ui;
}
 
void Form1::one()    
{
    text1+="1";
    //text1+=ui->pushButton->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::two()    
{
    text1+="2";
    //text1+=ui->pushButton_4->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::three()   
{
    text1+="3";
    //text1+=ui->pushButton_3->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::four()   
{
    text1+="4";
    //text1+=ui->pushButton_2->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::five()   
{
    text1+="5";
    //text1+=ui->pushButton_5->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::six()    
{
    text1+="6";
    //text1+=ui->pushButton_6->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::seven()    
{
    text1+="7";
    //text1+=ui->pushButton_7->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::eight()     
{
    text1+="8";
    //text1+=ui->pushButton_8->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::nine()    
{
    text1+="9";
    //text1+=ui->pushButton_9->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::star()    
{
    text1+="*";
    //text1+=ui->pushButton_10->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::zero()   
    text1+="0";
    //text1+=ui->pushButton_11->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::hash()    
{
    text1+="#";
    //text1+=ui->pushButton_12->text();
    ui->lineEdit->setText(text1);
}
 
void Form1::clear()    
{
    text1 = "";
    ui->lineEdit->clear();
}
 
void Form1::showForm2() 
{
    Form2 *frm2  = new Form2;
    frm2->show();
    //this->close();
    //this->destroy();
 
}
 
 
void Form1::closeSecondWindow()   
{
    this->close();
}
 
void Form1::mouseMoveEvent(QMouseEvent *event)    
{
    if (event->buttons() & Qt::LeftButton)
    {
        move(event->globalPos() - m_dragPosition);
        event->accept();
    }
}
void Form1::mousePressEvent(QMouseEvent *event)   
{
    if (event->button() == Qt::LeftButton)
    {
        m_dragPosition = event->globalPos() - frameGeometry().topLeft();
        event->accept();
    }
}

#include "form1.h"
#include "ui_form1.h"

#include "form2.h"  

#include <QPixmap>
#include <QPalette>
#include <QDesktopWidget>
#include <QRect>
#include <QSize>
#include <QApplication>

//#include <QIcon>

#include <QMouseEvent>  


#include <phonon/MediaObject>
#include <phonon/AudioOutput>
#include <phonon/VolumeSlider>
#include <QLibrary>
#include <windows.h>

Form1::Form1(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Form1)
{
    ui->setupUi(this);

    connect(ui->pushButton_24,SIGNAL(clicked()),this,SLOT(showMinimized()));  

    // These three line is used for remove 'window title bar'
   this->setWindowFlags(Qt::MSWindowsFixedSizeDialogHint);  
   this->setWindowFlags(Qt::CustomizeWindowHint);          
   this->setWindowFlags(Qt::FramelessWindowHint);         


   //this->setWindowFlags(Qt::SplashScreen);  

   //background image using 'pixmap' and 'palette'
   this->setFixedSize(270,350);

   QPixmap pixmap1("E:/workplace/image/two.JPG");
   QPalette p = palette();

   //resize image if it is larger than screen size.
   QDesktopWidget* desktopWidget = QApplication::desktop();
   QRect rect = desktopWidget->availableGeometry();

   QSize size(rect.width() , rect.height());
   //resize as per your requirement..
   //QPixmap pixmap(pixmap1.scaled(size));
   QPixmap pixmap(pixmap1.scaled(270,350));

   p.setBrush(QPalette::Background,  pixmap);
   setPalette(p);

   //ui->pushButton->setIcon(QIcon("E:/workplace/image/01.gif"));


  //connect(ui->horizontalSlider,SIGNAL(volumeChanged(Phonon::MediaObject,Phonon::AudioOutput)),
           //this,SLOT(setVolumeDecibel(Phonon::MediaObject,Phonon::AudioOutput)));


   QLibrary myLib("C:/Windows/System32/MMSYSTEM.DLL");

   myLib.load();

   if (myLib.isLoaded())
   {
   connect(ui->horizontalSlider,SIGNAL(sliderMoved(int)),this,SLOT(setAudioOutput()));
   }

   //Phonon::MediaObject *mediaObject = new Phonon::MediaObject(this);
   //Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory);
   //Phonon::createPath(mediaObject, audioOutput);
   //mediaObject->setCurrentSource(Phonon::MediaSource("C:/Windows/Suiystem32/MMSYSTEM.DLL"));
   //Phonon::VolumeSlider *volumeSlider = new Phonon::VolumeSlider;
   //volumeSlider->setAudioOutput(audioOutput);

}

Form1::~Form1()
{
    delete ui;
}

void Form1::one()    
{
    text1+="1";
    //text1+=ui->pushButton->text();
    ui->lineEdit->setText(text1);
}

void Form1::two()    
{
    text1+="2";
    //text1+=ui->pushButton_4->text();
    ui->lineEdit->setText(text1);
}

void Form1::three()   
{
    text1+="3";
    //text1+=ui->pushButton_3->text();
    ui->lineEdit->setText(text1);
}

void Form1::four()   
{
    text1+="4";
    //text1+=ui->pushButton_2->text();
    ui->lineEdit->setText(text1);
}

void Form1::five()   
{
    text1+="5";
    //text1+=ui->pushButton_5->text();
    ui->lineEdit->setText(text1);
}

void Form1::six()    
{
    text1+="6";
    //text1+=ui->pushButton_6->text();
    ui->lineEdit->setText(text1);
}

void Form1::seven()    
{
    text1+="7";
    //text1+=ui->pushButton_7->text();
    ui->lineEdit->setText(text1);
}

void Form1::eight()     
{
    text1+="8";
    //text1+=ui->pushButton_8->text();
    ui->lineEdit->setText(text1);
}

void Form1::nine()    
{
    text1+="9";
    //text1+=ui->pushButton_9->text();
    ui->lineEdit->setText(text1);
}

void Form1::star()    
{
    text1+="*";
    //text1+=ui->pushButton_10->text();
    ui->lineEdit->setText(text1);
}

void Form1::zero()   
    text1+="0";
    //text1+=ui->pushButton_11->text();
    ui->lineEdit->setText(text1);
}

void Form1::hash()    
{
    text1+="#";
    //text1+=ui->pushButton_12->text();
    ui->lineEdit->setText(text1);
}

void Form1::clear()    
{
    text1 = "";
    ui->lineEdit->clear();
}

void Form1::showForm2() 
{
    Form2 *frm2  = new Form2;
    frm2->show();
    //this->close();
    //this->destroy();

}


void Form1::closeSecondWindow()   
{
    this->close();
}

void Form1::mouseMoveEvent(QMouseEvent *event)    
{
    if (event->buttons() & Qt::LeftButton)
    {
        move(event->globalPos() - m_dragPosition);
        event->accept();
    }
}
void Form1::mousePressEvent(QMouseEvent *event)   
{
    if (event->button() == Qt::LeftButton)
    {
        m_dragPosition = event->globalPos() - frameGeometry().topLeft();
        event->accept();
    }
}

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i have another form named form2.this is not matter. i need to access the windows volume control with sliders(horizontal slider)

[squidge]

I don't see any code for accessing windows volume control, and I don't see any definitions for Form2, which is probably why the compiler is complaining.

[masuk]

i can't get any solution for control system volume level. as phonon use only for control application volume.i need source code how to control system(xp,vista,linux) volume using slider(horizontal slider).

thanks