Custom sighnal in main window not recognized?

[BDC_Patrick]

Hi there.. again..

Situation:
I have a MainWindow called tgs_mainwindow, and a Dialog called dialog_programsettings.

Inside the Settings, the user should be able to select a color as editor background.
The Editor background color is changed in the mainwindow, via stylesheet.
Like this:

qss = QString("#Area_DisplayContents {background: #" + EditorColor + "}");
    ui->Area_DisplayContents->setStyleSheet(qss);

Where EditorColor is a QString with "FFFFFF" Format (without #)

The header of the dialog:

class Dialog_ProgramSettings : public QDialog
{
    Q_OBJECT

public:
    explicit Dialog_ProgramSettings(QWidget *parent = nullptr);
    ~Dialog_ProgramSettings();

signals:
    void recolorEditorUI();

private:
    Ui::Dialog_ProgramSettings *ui;

private slots:
    void ShowColorDialog();
    void recolorPreview(QColor col);
};

Has a custom signal inside it. It gets emitted via a function in cpp. The Function is called, cause a testimage gets recolored with this function, too.

In the mainwindow cpp, i open the Dialog with this code:

            Dialog_ProgramSettings *dialog = new Dialog_ProgramSettings(this);
            dialog->setWindowTitle(tr("Einstellungen"));
            dialog->exec();
            connect(dialog, SIGNAL(recolorEditorUI()), this, SLOT(RecolorEditor()));

RecolorEditor is the Function, that recolors the Background.
This connection seems never to be triggered, cause the Background color never changes..

What do i have to do, to make it work?

[sierdzio]

Call connect() before you call exec() :-)

Plus, two general remarks:

• if only possible, use the new connect syntax
• check return value of connect() to make sure the connection has actually been established

[BDC_Patrick]

@sierdzio Thank you very much :D