Error in Qt creator?

[Macok]

I have an project opened in Qt creator and I'd like to add new window to it.
I choose File->New->Qt Designer Form Class->Widget and I even don't change anything, but when I try to compile I've got such an error:

/home/mac/C++/scan/window2.cpp:6: error: invalid use of incomplete type 'struct Ui::Window2'

To solve this problem it's needed to manualy open ui_window2.h file, and replace this fragment:

namespace Ui {
    class Form: public Ui_Form {};
} // namespace Ui

namespace Ui {
    class Form: public Ui_Form {};
} // namespace Ui

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by this:

namespace Ui {
    class Window2: public Ui_Form {};
} // namespace Ui

namespace Ui {
    class Window2: public Ui_Form {};
} // namespace Ui

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After that generally everything works fine, but everytime I change anything on my form in designer, Creator generates this wrong fragment and I cannot to compile the code.
Is it an error (I'm using candidate release), or I'm doing something wrong?

[codeslicer]

I don't have any problems...

Did you edit the object name in the Form Editor? Find the top-most widget and change it's object name to Window2.

[GiuseppeBonfa]

Hi,

I have an project opened in Qt creator and I'd like to add new window to it.
I choose File->New->Qt Designer Form Class->Widget and I even don't change anything, but when I try to compile I've got such an error:

It's normal, into Class Information dialog you have to change the Class Name field with another name you like, use Example1 etc.

Have a nice Day,
Giuseppe Bonfa'

[Macok]

Thanks a lot!

[Laudy]

I have the same problem with it.
In my source code, I wrote it as:
namespace Ui {
class Dialog;
}
/*in dialog.h*/
and used is in dialog.cpp as
Dialog:ialog(QWidget *parent) :
QDialog(parent),
ui(new Ui:ialog),
m_camera(new CameraDevice(this))
{
//ui = new Ui:ialog;
//m_camera = new CameraDevice(this);
ui->setupUi(this);

connect(m_camera, SIGNAL(imageReady(QImage)), this, SLOT(onImageArrival(QImage)));
connect(ui->startButton, SIGNAL(clicked()), m_camera, SLOT(start()));
connect(ui->stopButton, SIGNAL(clicked()), m_camera, SLOT(stop()));
}

[Laudy]

them it remained me
/root/QtProject/camera-build-desktop/../camera/dialog.cpp:8: error: invalid use of incomplete type ‘struct Ui:ialog’
/root/QtProject/camera-build-desktop/../camera/dialog.h:9: error: forward declaration of ‘struct Ui:ialog’
anyone help?

[saa7_go]

Add

#include "ui_dialog.h"

#include "ui_dialog.h"

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in your dialog.cpp

[mayankpgupta]

I am trying to create a calculator in qt . It is showing the following error :- "invalid use of incomplete type struct ui::calculator"

i have attached my files .. plz try to run them and reply as soon as possible.

[aamer4yu]

Had you created the project using Qt creator ?
Or you wrote your own .ui file ?

[rizbiakt09]

Its a good thread!