How to get debug output

[beggingqt]

I've made the simplest possible drawing App - four files.

I build this in the terminal with qmake; make

Sadly there is no output.

I've tried several things - all the suggestions that Mr Google made did not work

Here's the code:

mini.pro



QT += widgets

CONFIG += console

HEADERS = mini.h
SOURCES = mini.cpp main.cpp


main.cpp



#include <QApplication>

#include "mini.h"

int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Mini my;
my.show();
return app.exec();
}


mini.h


#ifndef MINI_H
#define MINI_H

#include <QWidget>

class Mini : public QWidget
{
Q_OBJECT

public:
Mini(QWidget *parent = 0);

protected:
void paintEvent(QPaintEvent *event) override;

};

#endif

mini.cpp


#include <QtWidgets>
#include <QDebug>

#include "mini.h"

Mini::Mini(QWidget *parent)
: QWidget(parent)
{
setWindowTitle(tr("Mini Graphics"));
resize(300, 200);
}

void Mini::paintEvent(QPaintEvent * )
{
QColor color;
QPainter painter(this);

qDebug() << "painting";

color.setHsv(100, 255, 191);
painter.setPen(color);
painter.drawLine(50, 50, 100, 150);
}

[ado130]

The first thing, please put your code into CODE tags and second thing, do you build your program in Debug or Release profile?

[beggingqt]

Sorry about the Code tag thing - I'm unused this interface

To build the program I typed:



> qmake
> make


In a mac terminal window - I'm not running inside QT Creator.

I don't know what a Debug or Release profile is.

[Ginsengelf]

Hi, try to add

CONFIG += debug
to your .pro file. This will build the program in debug mode and enable QDebug output.

Ginsengelf

[beggingqt]

Still no output.

I tried all combinations of debug and console



CONFIG =+ debug
CONFIG += console


But no joy.

A bit of Googling showed that this question has been asked many times
but I could find no satisfactory answer.

Any more ideas?

[jefftee]

What do you even mean by "debug output"? Are you referring to output from the qDebug() macro that you have added to your code or what are you referring to exactly?