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Custom sighnal in main window not recognized?



  • 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?


  • Moderators

    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

  • Moderators

    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


  • @sierdzio Thank you very much :D