Move from QML Only Application to Qt Quick Application with C++

kyleplattner

I have been developing my application with only QML and JavaScript. I recognize that I need to move to C++ soon and so I started that transition today. I created a new Qt Quick Application and imported all of my QML Files into it. When I try to build the Main.Pro file I receive:

@:-1: warning: directory '/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib' following -L not found@

@:-1: warning: directory '/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib' following -F not found@

@:-1: error: [copydeploymentfolders] Error 1@

Any help would be appreciated. Thanks.

kamalakshantv

check the console output for more detailed information.

kyleplattner

@Running build steps for project Main...
Configuration unchanged, skipping qmake step.
Starting: "/usr/bin/make" -w
make: Entering directory /Users/kp/Desktop/Precision Work/Harvest DU Repository/Main-build-desktop' g++ -c -pipe -g -gdwarf-2 -Wall -W -DQT_DECLARATIVE_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/local/Qt4.7/mkspecs/macx-g++ -I../Main -I/Library/Frameworks/QtCore.framework/Versions/4/Headers -I/usr/include/QtCore -I/Library/Frameworks/QtGui.framework/Versions/4/Headers -I/usr/include/QtGui -I/Library/Frameworks/QtDeclarative.framework/Versions/4/Headers -I/usr/include/QtDeclarative -I/usr/include -I../Main/qmlapplicationviewer -I. -I../Main -I. -F/Library/Frameworks -o main.o ../Main/main.cpp g++ -headerpad_max_install_names -o Main.app/Contents/MacOS/Main main.o qmlapplicationviewer.o moc_qmlapplicationviewer.o -F/Library/Frameworks -L/Library/Frameworks -framework QtDeclarative -L/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib -F/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib -framework QtScript -framework QtSvg -framework QtSql -framework QtXmlPatterns -framework QtOpenGL -framework QtNetwork -framework QtGui -framework QtCore ld: warning: directory '/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib' following -L not found ld: warning: directory '/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib' following -F not found Copying application data... cp: Repository/Main/../QML: No such file or directory make: *** [copydeploymentfolders] Error 1 make: Leaving directory /Users/kp/Desktop/Precision Work/Harvest DU Repository/Main-build-desktop'
The process "/usr/bin/make" exited with code 2.
Error while building project Main (target: Desktop)
When executing build step 'Make'@

kamalakshantv

Seems to be some issue with the path

bq. cp: Repository/Main/../QML: No such file or directory

Its not able to find the above location, please verify this in your code.

kyleplattner

The folder exists... and all that is in my cpp file is this:

@#include <QtGui/QApplication>
#include "qmlapplicationviewer.h"

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

QmlApplicationViewer viewer;
viewer.setOrientation(QmlApplicationViewer::ScreenOrientationAuto);
viewer.setMainQmlFile&#40;QLatin1String("QML/QMLFinal.qml"&#41;);
viewer.showExpanded();

return app.exec();

}
@

kamalakshantv

Check if the folder exists at this path

@/Users/kp/Desktop/Precision Work/Harvest DU Repository/Main-build-desktop@

kyleplattner

It does not. Do I need to copy it in there manually?

kamalakshantv

copying it manually will fix it. But you will have to add it in your .pro file or better still put QML into your resource file.

kyleplattner

how do I add it to my pro file or resource file? Will doing so negate the need to move it in manually?

kamalakshantv

[quote author="kyleplattner" date="1293047005"]how do I add it to my pro file or resource file? Will doing so negate the need to move it in manually?[/quote]

You can add them as OTHER_FILES to .pro

kamalakshantv

[quote author="kyleplattner" date="1293047005"]how do I add it to my pro file or resource file? Will doing so negate the need to move it in manually?[/quote]

The best option is to use "resource":http://doc.qt.nokia.com/4.0/resources.html. You can use Qt Creator to add a new resource. Just check the docs for more info.

kyleplattner

Seems like this is a bug that needs fixing.

kyleplattner

Still having problems with this:

ld: warning: directory '/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib' following -L not found
ld: warning: directory '/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib' following -F not found

Any ideas there?

kamalakshantv

[quote author="QtK" date="1293047938"]
[quote author="kyleplattner" date="1293047413"]Seems like this is a bug that needs fixing. [/quote]

No its not a bug. But yes it can be enhanced, so that Qt Creator does it automatically[/quote]

kamalakshantv

[quote author="kyleplattner" date="1293047844"]Still having problems with this:

ld: warning: directory '/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib' following -L not found
ld: warning: directory '/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib' following -F not found

Any ideas there?[/quote]

Its a warning right. Your app must be compiled properly now.

kyleplattner

Added the .qrc and still having this error stop my build:

@Running build steps for project Main...
Configuration unchanged, skipping qmake step.
Starting: "/usr/bin/make" -w
make: Entering directory /Users/kp/Desktop/Precision Work/Harvest DU Repository/Main-build-desktop' /Developer/Tools/Qt/rcc -name Main ../Main/Main.qrc -o qrc_Main.cpp g++ -c -pipe -O2 -Wall -W -DQT_NO_DEBUG -DQT_DECLARATIVE_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/local/Qt4.7/mkspecs/macx-g++ -I../Main -I/Library/Frameworks/QtCore.framework/Versions/4/Headers -I/usr/include/QtCore -I/Library/Frameworks/QtGui.framework/Versions/4/Headers -I/usr/include/QtGui -I/Library/Frameworks/QtDeclarative.framework/Versions/4/Headers -I/usr/include/QtDeclarative -I/usr/include -I../Main/qmlapplicationviewer -I. -I../Main -I. -F/Library/Frameworks -o qrc_Main.o qrc_Main.cpp g++ -headerpad_max_install_names -o Main.app/Contents/MacOS/Main main.o qmlapplicationviewer.o moc_qmlapplicationviewer.o qrc_Main.o -F/Library/Frameworks -L/Library/Frameworks -framework QtDeclarative -L/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib -F/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib -framework QtScript -framework QtSvg -framework QtSql -framework QtXmlPatterns -framework QtOpenGL -framework QtNetwork -framework QtGui -framework QtCore ld: warning: directory '/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib' following -L not found ld: warning: directory '/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/lib' following -F not found Copying application data... cp: Repository/Main/../QML: No such file or directory make: *** [copydeploymentfolders] Error 1 make: Leaving directory /Users/kp/Desktop/Precision Work/Harvest DU Repository/Main-build-desktop'
The process "/usr/bin/make" exited with code 2.
Error while building project Main (target: Desktop)
When executing build step 'Make'@

kamalakshantv

The error is same as you received above right. Please try it first and then make an attempt to post or ask - this way you will learn better.

Also you might have added it in your .qrc, but are you loading qml file from that path.

kyleplattner

When I try running the compiled application I get:

<Unknown File>: File error for URL file:///Users/kp/Desktop/Precision Work/Harvest DU Repository/Main-build-desktop/Main.app/Contents/Resources/QML/QMLFinal.qml

kyleplattner

Would someone be willing to make a Wiki on the process of going from a QML only application to a Qt Quick C++ Application. It seems like a process many people go through so it would be helpful. I have found the process really difficult and I still have not got it done yet. Thanks.

mbrasser

What version of Creator are you using? This might be something that has been recently improved -- I'm compiling Creator from source, and the conversion from QML-only to QML + C++ project seems to "just work", at least for a small test case (and in general, QML support in Creator has been progressing at a very rapid pace in recent months). I've found the Creator team very responsive to feedback -- if you have suggestions for improving the process I'd highly recommend adding a report on bugreports.qt.nokia.com.

Regards,
Michael