error: member access into incomplete type

Lost User

could somebody PLEASE explain to me and help me to understand the error. I can build and show the dialog object // build basic dialoog MainWindow_Bluewtoothctl_Dialog *MWBD = new MainWindow_Bluewtoothctl_Dialog(); MWBD->show(); however I cannot access its "ui" and getting the "incomplete error ". I build a local function and then have access to "ui". QT_BEGIN_NAMESPACE namespace Ui { class MainWindow_Bluewtoothctl_Dialog; } QT_END_NAMESPACE class MainWindow_Bluewtoothctl_Dialog : public QDialog { Q_OBJECT public: MainWindow_Bluewtoothctl_Dialog(QWidget *parent = nullptr); ~MainWindow_Bluewtoothctl_Dialog(); // adds BT_Utility_Library *BTUL; QString text; QString EditText(QString ); QString EditText(QString, QWidget*); QString EditText(QString, QWidget*, QWidget*); QString Command(QString ); private: public: Ui::MainWindow_Bluewtoothctl_Dialog *ui; };

MainWindow_Bluewtoothctl_Dialog::MainWindow_Bluewtoothctl_Dialog(QWidget *parent)
: QDialog(parent)
, ui(new Ui::MainWindow_Bluewtoothctl_Dialog)
{
ui->setupUi(this);
#ifdef TRACE
text = " TASK MainWindow_Bluewtoothctl_Dialog ";
text += " ";
text += Q_FUNC_INFO;
text += " @ line ";
text += QString::number(__LINE__);
//text += " TASK index ";
//text += QString::number(index);
qDebug() << text;
ui->textEdit->append(text);
#endif
text = " Constructor...";
ui->textEdit->append(" Constructor..."); // OK here
}

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

// build basic dialoog
MainWindow_Bluewtoothctl_Dialog *MWBD = new MainWindow_Bluewtoothctl_Dialog();
MWBD->show();

    // add function to bypass "INCOMPLETE WHATEVER
    text = " add function to bypass INCOMPLETE WHATEVER ";
    MWBD->EditText(text);


    // TEST ui
    MWBD->ui->textEdit->append(text);

this fails with "incomplete error " why ?

Here is full error:

mainwindow.cpp:595:17: error: member access into incomplete type 'Ui::MainWindow_Bluewtoothctl_Dialog'
MWBD->ui->textEdit->append(text);
^
/mnt/07b7c3f8-0efb-45ab-8df8-2a468771de1f/BT_NOV26_BACKUP/BT_NOV26/FT857_CAT_Bluetooth/BluetoothctldIALOG_Object/Bluetoothctl_Dialog/mainwindow_bluewtoothctl_dialog.h:16:22: note: forward declaration of 'Ui::MainWi

Richard Andrew x64

I think it's telling you that the type represented by ui has not been completely declared. Make sure you are #including the header files for all the types you are using.

The difficult we do right away... ...the impossible takes slightly longer.

JudyL_MD

You need to work on your google foo -- this was the first result when I searched on "access into incomplete type" and it has a very good explanation of the problem https://stackoverflow.com/questions/19962812/error-member-access-into-incomplete-type-forward-declaration-of[^]

Be wary of strong drink. It can make you shoot at tax collectors - and miss. Lazarus Long, "Time Enough For Love" by Robert A. Heinlein

Lost User

Many thanks, my own fault...missed ui header. I always forget to add the "ui...." header created by QT... The "forward note" error was not too helpful either. #include "ui_mainwindow_bluewtoothctl_dialog.h"

Richard Andrew x64

Glad I was able to help!

The difficult we do right away... ...the impossible takes slightly longer.