Native Development

[javoid]

All the samples I've seen do this:

Camera *camera = root->findChild<Camera*>("myCamera");

I've sucessfully added a camera in straight C.

Now I would like to do so with cascades, but I'm thinking it doesn't need a QML file.

For example, I can declare a button like so:

Button *button; 

Then in the implementation:

button = new Button():

...and add it to an existing container.

I'd like to add a camera created in code to my existing container:

Camera *camera = new Camera();
myContainer->add(myCamera);

 But this doesn't work.  I get an error for:

undefined reference to bb::cascades::multimedia::Camera::Camera(bb::cascades::Container*)

I tried to pass in a reference to an existing container that it will be contained in, but I get mor errors.

All the demos I found on github (including the jam source codes) all show either straight C or QML.  I know I can make a QML file, but I'm trying to do this purely in C++.

Am I wrong about this?  Does creating an instance of Camera in cascades require a QML file?

[javoid]

Can anyone help?   

I've banging my head with this for the past 2 days. 

[BGmot]

can you provide full console output when you are building your app?

[javoid]

Sure thing!

Here's the code:

H file:

#ifndef CAMERACONTOLLER_H_
#define CAMERACONTOLLER_H_

#include <QtCore/QObject>
#include <QtCore/QMetaType>

#include <bb/cascades/Application>
#include <bb/cascades/multimedia/Camera>

using namespace bb::cascades;
using namespace bb::cascades::multimedia;

class CameraContoller : public QObject
{
	Q_OBJECT

public:
	CameraContoller();
	~CameraContoller();

	Container* getCameraContainer();

	void startCamera();
	void stopCamera();

private:
	Container *m_cameraContainer;
	Camera *m_camera;
};

#endif /* CAMERACONTOLLER_H_ */

 cpp file:

#include <bb/cascades/multimedia/Camera>
#include <bb/cascades/multimedia/CameraUnit>
#include <bb/cascades/multimedia/CameraSettings>
#include <bb/cascades/multimedia/CameraFlashMode>

using namespace bb::cascades;
using namespace bb::cascades::multimedia;

CameraContoller::CameraContoller()
{
	qmlRegisterType<Camera>("bb.cascades.multimedia",1,0,"Camera");

	m_cameraContainer = Container::create()
	        .layout(DockLayout::create())
	        .add(Container::create()
	            .horizontal(HorizontalAlignment::Center)
	            .vertical(VerticalAlignment::Center));

	m_camera = new Camera(m_cameraContainer);
	//m_camera = new Camera();
	m_cameraContainer->add(m_camera);
}

void CameraContoller::startCamera()
{
	m_camera->setPreferredWidth(768);
	m_camera->setPreferredHeight(1280);
	m_camera->open(CameraUnit::Rear);

	CameraSettings* cameraSettings = new CameraSettings();
	cameraSettings->setFlashMode(CameraFlashMode::Light);
	m_camera->applySettings(cameraSettings);

	m_camera->startViewfinder();
}

 Problem output:

Description Resource Path Location Type

make: *** [Device-Debug] Error 2 TestLed C/C++ Problem

make[1]: *** [debug] Error 2 TestLed C/C++ Problem

make[2]: *** [o.le-v7-g/TestLed] Error 1 TestLed C/C++ Problem

undefined reference to `bb::cascades::multimedia::Camera::~Camera()' TestLed line 86, external location: /Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative/qdeclarativeprivate.h C/C++ Problem

undefined reference to `bb::cascades::multimedia::Camera::applySettings(bb::cascades::multimedia::CameraSettings*)' CameraContoller.cpp /TestLed/src line 176 C/C++ Problem

undefined reference to `bb::cascades::multimedia::Camera::Camera(bb::cascades::Container*)' CameraContoller.cpp /TestLed/src line 77 C/C++ Problem

undefined reference to `bb::cascades::multimedia::Camera::Camera(bb::cascades::Container*)' TestLed line 82, external location: /Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative/qdeclarativeprivate.h C/C++ Problem

undefined reference to `bb::cascades::multimedia::Camera:pen(bb::cascades::multimedia::CameraUnit::Type)' CameraContoller.cpp /TestLed/src line 172 C/C++ Problem

undefined reference to `bb::cascades::multimedia::Camera::startViewfinder()' CameraContoller.cpp /TestLed/src line 178 C/C++ Problem

undefined reference to `bb::cascades::multimedia::Camera::staticMetaObject' TestLed line 163, external location: /Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative/qdeclarative.h C/C++ Problem

undefined reference to `bb::cascades::multimedia::Camera::staticMetaObject' TestLed line 189, external location: /Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative/qdeclarative.h C/C++ Problem

undefined reference to `bb::cascades::multimedia::CameraSettings::CameraSettings(QObject*)' CameraContoller.cpp /TestLed/src line 174 C/C++ Problem

undefined reference to `bb::cascades::multimedia::CameraSettings::setFlashMode(bb::cascades::multimedia::CameraFlashMode::Type)' CameraContoller.cpp /TestLed/src line 175 C/C++ Problem

Source file of asset "TestLed.so" does not exist. bar-descriptor.xml /TestLed line 74 BlackBerry App Manifest Problem

Source file of asset "TestLed" does not exist. bar-descriptor.xml /TestLed line 69 BlackBerry App Manifest Problem

Source file of asset "TestLed" does not exist. bar-descriptor.xml /TestLed line 78 BlackBerry App Manifest Problem

Source file of asset "TestLed" does not exist. bar-descriptor.xml /TestLed line 82 BlackBerry App Manifest Problem

And console output:

**** Build of configuration Device-Debug for project TestLed ****

make Device-Debug 

make -C .//translations -f Makefile update

make[1]: Entering directory `/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/translations'

/Users/user/Applications/blackberry/host_10_0_9_404/darwin/x86/usr/bin/lupdate TestLed.pro

Updating 'TestLed.ts'...

    Found 0 source text(s) (0 new and 0 already existing)

make[1]: Leaving directory `/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/translations'

make -C .//translations -f Makefile release

make[1]: Entering directory `/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/translations'

/Users/user/Applications/blackberry/host_10_0_9_404/darwin/x86/usr/bin/lrelease TestLed.pro

Updating '/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/translations/TestLed.qm'...

    Generated 0 translation(s) (0 finished and 0 unfinished)

make[1]: Leaving directory `/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/translations'

make -C ./arm -f Makefile debug

make[1]: Entering directory `/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/arm'

make -f Makefile.Debug

make[2]: Entering directory `/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/arm'

qcc -Vgcc_ntoarmv7le -c -Wc,-include -Wc,o.le-v7-g/.obj/TestLed -Wno-psabi -lang-c++ -fstack-protector-strong -mcpu=cortex-a9 -g -Wno-psabi -Wall -W -D_REENTRANT -DQT_NO_IMPORT_QT47_QML -DQ_OS_BLACKBERRY -DQT_DECLARATIVE_DEBUG -DQT_DECLARATIVE_LIB -DQT_CORE_LIB -DQT_SHARED -I/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/share/qt4/mkspecs/blackberry-armv7le-qcc -I../../TestLed -I/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtCore -I/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative -I/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4 -I../src -Io.le-v7-g/.moc -I/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include -I/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/freetype2 -I. -o o.le-v7-g/.obj/CameraContoller.o ../src/CameraContoller.cpp

qcc -Vgcc_ntoarmv7le -lang-c++ -Wl,-rpath-link,/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/armle-v7/lib -Wl,-rpath-link,/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/armle-v7/usr/lib -Wl,-rpath-link,/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/armle-v7/usr/lib/qt4/lib -o o.le-v7-g/TestLed o.le-v7-g/.obj/CameraContoller.o o.le-v7-g/.obj/TestLed.o o.le-v7-g/.obj/main.o o.le-v7-g/.obj/moc_CameraContoller.o o.le-v7-g/.obj/moc_TestLed.o    -L/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/armle-v7/lib -L/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/armle-v7/usr/lib -L/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/armle-v7/usr/lib/qt4/lib -L/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6//usr/lib/qt4/lib -lcamapi -lscreen -lbbcascades -lQtDeclarative -lQtScript -lQtSvg -lQtSql -lsqlite3 -lz -lQtXmlPatterns -lQtGui -lQtNetwork -lsocket -lQtCore -lm -lbps 

o.le-v7-g/.obj/CameraContoller.o: In function `CameraContoller':

make[2]: Leaving directory `/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/arm'

make[1]: Leaving directory `/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/arm'

  errors start here

/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/arm/../src/CameraContoller.cpp:80: undefined reference to `bb::cascades::multimedia::Camera::Camera(bb::cascades::Container*)'

o.le-v7-g/.obj/CameraContoller.o: In function `CameraContoller::startCamera()':

/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/arm/../src/CameraContoller.cpp:175: undefined reference to `bb::cascades::multimedia::Camera:pen(bb::cascades::multimedia::CameraUnit::Type)'

/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/arm/../src/CameraContoller.cpp:177: undefined reference to `bb::cascades::multimedia::CameraSettings::CameraSettings(QObject*)'

/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/arm/../src/CameraContoller.cpp:178: undefined reference to `bb::cascades::multimedia::CameraSettings::setFlashMode(bb::cascades::multimedia::CameraFlashMode::Type)'

/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/arm/../src/CameraContoller.cpp:179: undefined reference to `bb::cascades::multimedia::Camera::applySettings(bb::cascades::multimedia::CameraSettings*)'

/Users/user/Documents/code/blackberry/ndk-10.0.9-workspace/TestLed/arm/../src/CameraContoller.cpp:181: undefined reference to `bb::cascades::multimedia::Camera::startViewfinder()'

o.le-v7-g/.obj/CameraContoller.o: In function `int qmlRegisterType<bb::cascades::multimedia::Camera>(char const*, int, int, char const*)':

/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative/qdeclarative.h:163: undefined reference to `bb::cascades::multimedia::Camera::staticMetaObject'

/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative/qdeclarative.h:163: undefined reference to `bb::cascades::multimedia::Camera::staticMetaObject'

/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative/qdeclarative.h:189: undefined reference to `bb::cascades::multimedia::Camera::staticMetaObject'

/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative/qdeclarative.h:189: undefined reference to `bb::cascades::multimedia::Camera::staticMetaObject'

o.le-v7-g/.obj/CameraContoller.o: In function `QDeclarativeElement':

/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative/qdeclarativeprivate.h:82: undefined reference to `bb::cascades::multimedia::Camera::Camera(bb::cascades::Container*)'

o.le-v7-g/.obj/CameraContoller.o.rodata._ZTVN19QDeclarativePrivate19QDeclarativeElementIN2bb8cascades10multimedia6CameraEEE[_ZTVN19QDeclarativePrivate19QDeclarativeElementIN2bb8cascades10multimedia6CameraEEE]+0x8): undefined reference to `bb::cascades::multimedia::Camera::metaObject() const'

o.le-v7-g/.obj/CameraContoller.o.rodata._ZTVN19QDeclarativePrivate19QDeclarativeElementIN2bb8cascades10multimedia6CameraEEE[_ZTVN19QDeclarativePrivate19QDeclarativeElementIN2bb8cascades10multimedia6CameraEEE]+0xc): undefined reference to `bb::cascades::multimedia::Camera::qt_metacast(char const*)'

o.le-v7-g/.obj/CameraContoller.o.rodata._ZTVN19QDeclarativePrivate19QDeclarativeElementIN2bb8cascades10multimedia6CameraEEE[_ZTVN19QDeclarativePrivate19QDeclarativeElementIN2bb8cascades10multimedia6CameraEEE]+0x10): undefined reference to `bb::cascades::multimedia::Camera::qt_metacall(QMetaObject::Call, int, void**)'

o.le-v7-g/.obj/CameraContoller.o.rodata._ZTIN19QDeclarativePrivate19QDeclarativeElementIN2bb8cascades10multimedia6CameraEEE[_ZTIN19QDeclarativePrivate19QDeclarativeElementIN2bb8cascades10multimedia6CameraEEE]+0x8): undefined reference to `typeinfo for bb::cascades::multimedia::Camera'

o.le-v7-g/.obj/CameraContoller.o: In function `~QDeclarativeElement':

/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative/qdeclarativeprivate.h:86: undefined reference to `bb::cascades::multimedia::Camera::~Camera()'

/Users/user/Applications/blackberry/target_10_0_9_1673/qnx6/usr/include/qt4/QtDeclarative/qdeclarativeprivate.h:86: undefined reference to `bb::cascades::multimedia::Camera::~Camera()'

cc: /Users/user/Applications/blackberry/host_10_0_9_404/darwin/x86/usr/bin/ntoarm-ld error 1

make[2]: *** [o.le-v7-g/TestLed] Error 1

make[1]: *** [debug] Error 2

make: *** [Device-Debug] Error 2

**** Build Finished ****

[javoid]

I'm also including the bb/cascades/container and a few others in the cpp file, but it's not shown in the trimmed files above.

[BGmot]

It's linker's error so nothing to do with #include's. Indeed it can't find symbols although you seem to include all needed libraries. Couple of questions:

1. Why do you need all these QtXxx libraries??

>lQtDeclarative -lQtScript -lQtSvg -lQtSql -lsqlite3 -lz -lQtXmlPatterns -lQtGui -lQtNetwork -lsocket -lQtCore -lm -lbps 

2. What's the purpose of 

>qmlRegisterType<Camera>("bb.cascades.multimedia",1,0,"Camera");

you said you didn't want to use QML...

[javoid]

"1. Why do you need all these QtXxx libraries??"

I have been butchering my code trying to figure out what works and what doesn't.  I also started from a sample project so they may have been included then.

"2. What's the purpose of 

>qmlRegisterType<Camera>("bb.cascades.multimedia",1,0,"Camera");"

I read somewhere that there would be a problem without it (I added it when I was butchering the code).

"It's linker's error so nothing to do with #include's"

Okay, so what do you recommend?

[javoid]

">lQtDeclarative -lQtScript -lQtSvg -lQtSql -lsqlite3 -lz -lQtXmlPatterns -lQtGui -lQtNetwork -lsocket -lQtCore -lm -lbps "

I've looked all over the project and can't see where these are being added.

[javoid]

When creating a default Cascades project, those libs are added automatically to my build.

[smcveigh]

there is more or less a working bare-bones cascades C++ camera example in this thread:

http://supportforums.blackberry.com/t5/Cascades-Development/set-aspect-ratio-for-the-Camera-custom-c...