How to add GUI to a Qt console application?

[Zoltan]

I created a Non-Qt project with the qmake build system. I created another project, but this time a Qt Widgets Application. They both work individually, but I now want to have only one project: i.e. add the GUI project to the console project. How should I modify the .pro file of the console application to achieve it?

This is my console project:

TEMPLATE = app
CONFIG += console
CONFIG -= app_bundle
CONFIG -= qt

SOURCES += src/gregorian.c \
    src/main.c

And this is my GUI project:

#-------------------------------------------------
#
# Project created by QtCreator 2016-08-21T16:32:41
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = ZellerGUI
TEMPLATE = app


SOURCES += main.cpp\
        zellergui.cpp \
    gregorian.cpp

HEADERS  += zellergui.h \
    gregorian.h

FORMS    += zellergui.ui

By the way, if I know in advance that I might have a GUI, is it recommended to create a Qt Widgets Application from the start? If it happens to remain without GUI, can it be later modified to a console application?

Thank you.

[SGaist]

Hi,

You have an example in the detailed documentation of QApplication on how to start an application either as console or GUI app.

The most simple path would be to copy your classes from your console application to your GUI application and then modify the main.cpp to start in on or the other mode and you should be fine.

Hope it helps

[Zoltan]

@SGaist Thank you, I will try it!