QMP3Gain Code

#include "constantgainchangedialog.h"
#include "mainwindow.h"
#include "mymessagebox.h"

ConstantGainChangeDialog::ConstantGainChangeDialog(QWidget *parent)
    : QDialog(parent)
{
    setupUi(this);

    setWindowTitle(windowTitle().arg(MainWindow::getAppTitle()));

    connect(horizontalSlider_constGainChange, SIGNAL(valueChanged(int)), this, SLOT(updateLineEdit_constGainChange(int)));
    connect(groupBox_onlyOneChannel, SIGNAL(toggled(bool)), this, SLOT(groupBox_onlyOneChannel_toggled(bool)));

    updateLineEdit_constGainChange(horizontalSlider_constGainChange->value());
}

ConstantGainChangeDialog::~ConstantGainChangeDialog(){
}

void ConstantGainChangeDialog::updateLineEdit_constGainChange(int value){
    lineEdit_constGainChange->setText(QString("%1").arg((double)value*1.5, 0, 'f', 1));
    buttonBox->button(QDialogButtonBox::Ok)->setEnabled(value!=0);
}

void ConstantGainChangeDialog::groupBox_onlyOneChannel_toggled(bool isOn){
    if (isOn){
        MainWindow* mainWindow = qobject_cast<MainWindow*>(this->parent());
        mainWindow->getSettings()->beginGroup("logOptionsDialog");
        bool isConfirmSuppressed = mainWindow->getSettings()->value("groupBox_onlyOneChannel_ConfirmSuppressed", false).toBool();
        if (!isConfirmSuppressed){
            MyMessageBox::warning(this, MainWindow::getAppTitle()+QString(" - ")+tr("Warning"),
                                  tr("This function will only work if the mp3 is encoded as "
                                     "stereo or dual channel, NOT joint-stereo or mono."),
                                  tr("Don't show this warning again"),
                                  isConfirmSuppressed);
            if (isConfirmSuppressed){
                mainWindow->getSettings()->setValue("groupBox_onlyOneChannel_ConfirmSuppressed", true);
            }
        }
        mainWindow->getSettings()->endGroup();
    }
}