how to attach class to qt project without ui file?

[timob256]

created a class which added to the project without ui.
I can't call it correctly.

** the class I'm embedding: **

#ifndef OKNONASTROEK_H
#define OKNONASTROEK_H

#include <QMainWindow>
#include <QDebug>
#include <QPainter>
#include <QPen>
#include <QFont>
#include <QFontMetrics>
#include <QKeyEvent>
#include <QRegion>
#include <QPointF>
#include <QGraphicsView>

namespace Widgets {
struct texnStructur
{
    texnStructur () // immediately fill it with zeros
    {
        for (uint i = 0; i <sizeof (m_t_razm) / sizeof (m_t_razm [0]); i ++)
            m_t_razm [i] = 0;
    }
    float m_t_razm [12];
};


class window pane: public QWidget
{
    Q_OBJECT

public:
    windowspar (QWidget * parent = 0);
    ~ windowspawn ();

    void razmer_element (int x, int y);


protected:
    void paintEvent (QPaintEvent * event);


    texnStructur _myTexpr;

};
}
#endif // OKNONASTROEK_H

** here is the "body" of the class **

#include "oknonastroek.h"

Widgets :: windowastroek :: windowastroek (QWidget * parent)
    : QWidget (parent)
{
}

Widgets :: windowspawn :: ~ windowpattern ()
{

}

void Widgets :: oknonastroek :: razmer_element (int x, int y)
{
    // set the size of the lines here
    _myTexpr.m_t_razm [0] = x / 60.0; // X indent
    _myTexpr.m_t_razm [1] = g / 4.0 + g / 60.0; // Y indent
    _myTexpr.m_t_razm [2] = x / 3.0; // width (window) x
    _myTexpr.m_t_razm [3] = g / 1.4; // height (window) y
}

void Widgets :: windowastroek :: paintEvent (QPaintEvent * event)
{
    QPainter painter (this); // Create a renderer object
    QBrush bgfon (QColor (180,220,220), Qt :: SolidPattern); // set the background color and fill type (with background without background and fill type)
    painter.setPen (Qt :: NoPen); // paint brush if not needed

    painter.setRenderHint (QPainter :: Antialiasing); // remove sharp cubes
    painter.setBrush (bgfon); // set the background color
    razmer_element (this-> width (), this-> height ()); // set the size of the element

    painter.drawRect (_myTexpr.m_t_razm [0], _myTexpr.m_t_razm [1], _myTexpr.m_t_razm [2], _myTexpr.m_t_razm [3]);
}

** And here's the main class: **

#ifndef OKNOWIBORA_H
#define OKNOWIBORA_H

#include <QMainWindow>
#include <QDebug>
#include <QPainter>
#include <QPen>
#include <QFont>
#include <QFontMetrics>
#include <QKeyEvent>
#include <QRegion>
#include <QPointF>
#include <QGraphicsView>

#include "oknonastroek.h"



struct texnStructur
{
    texnStructur () // immediately fill it with zeros
    {
        for (uint i = 0; i <sizeof (m_t_razm) / sizeof (m_t_razm [0]); i ++)
            m_t_razm [i] = 0;
    }
    
    float m_t_razm [12];
};

WindowVibora class: public QMainWindow
{
    Q_OBJECT

public:
    WindowWibora (QWidget * parent = 0);
    ~ WindowVibora ();

    void razmer_element (int x, int y);


protected:
    void paintEvent (QPaintEvent * event);
    Widgets :: windowstrip * oknonastr;

    texnStructur _myTexpr;
};

#endif // OKNOWIBORA_H

** "body" of the main class **

#include "oknowibora.h"

OknoWibora :: OknoWibora (QWidget * parent)
    : QMainWindow (parent)
{
    oknonastr = new Widgets :: oknonastroek (this);
}

OknoWibora :: ~ OknoWibora ()
{

}

void OknoWibora :: paintEvent (QPaintEvent * event)
{
    QPainter painter (this); // Create a renderer object
    QBrush bgfon (QColor (220,180,220), Qt :: SolidPattern); // set the background color and fill type (with background without background and fill type)

    QPen pen_abris (Qt :: black, 2, Qt :: SolidLine, Qt :: FlatCap); // outline (compass) brush
    QPen pen_line (Qt :: black, 2, Qt :: SolidLine, Qt :: FlatCap); // brush for lines and text

    painter.setRenderHint (QPainter :: Antialiasing); // remove sharp cubes
    painter.setBrush (bgfon); // set the background color

    painter.setPen (Qt :: NoPen); // paint brush if not needed
    razmer_element (this-> width (), this-> height ()); // set the dimensions
    painter.drawRect (_myTexpr.m_t_razm [0], _myTexpr.m_t_razm [1], _myTexpr.m_t_razm [2], _myTexpr.m_t_razm [3]);

    oknonastr-> update ();

    qDebug () << "rere1";
}
void OknoWibora :: razmer_element (int x, int y)
{
    // set the size of the lines here
    _myTexpr.m_t_razm [0] = x / 60.0; // X indent
    _myTexpr.m_t_razm [1] = y / 60.0; // Y indent
    _myTexpr.m_t_razm [2] = x- (x / 60.0) * 2.0; // width (window) x
    _myTexpr.m_t_razm [3] = y / 4.0; // height (window) y
            qDebug () << "x:" << x << "_myTexpr.m_t_razm [0]:" << _myTexpr.m_t_razm [0];
            qDebug () << "x:" << x << "_myTexpr.m_t_razm [1]:" << _myTexpr.m_t_razm [1];
            qDebug () << "y:" << y << "_myTexpr.m_t_razm [2]:" << _myTexpr.m_t_razm [2];
            qDebug () << "y:" << y << "_myTexpr.m_t_razm [3]:" << _myTexpr.m_t_razm [3];
}

---

here is the announcement

  oknonastr = new Widgets :: oknonastroek (this);

here is an update

     oknonastr-> update ();

if there was ui, then the file attached to the project, then the turquoise square would be beautifully displayed and so straight it is sad

[mpergand]

@timob256

OK, I explain in details:

When you don't use an UI from the Designer, you need to:

1. set the central widget
2. add a layout to the central widget
3. add others widgets to the layout

QWidget* centralWidget= new QWidget;
setCentralWidget(centralWidget);
QBoxLayout* layout= new QVBoxLayout;
centralWidget->setLayout(layout);
layout->addWidget( *yourTurquoiseWidget*);

[mpergand]

I think you need to put your 'turquoise widget' in a layout.

[timob256]

@mpergand said in how to attach class to qt project without ui file?:

turquoise widget

OknoWibora::OknoWibora(QWidget *parent)
: QMainWindow(parent)
{
display = new QLineEdit();

QGridLayout *mainLayout = new QGridLayout;

oknonastr = new Widgets::OknoNastroek(this);

mainLayout->addWidget(oknonastr);
mainLayout->addWidget(display);

}

[Pl45m4]

@timob256 said in how to attach class to qt project without ui file?:

windowspar (QWidget * parent = 0);
~ windowspawn ();

Typo or does your class c'tor have a different name than your d'tor?

[timob256]

@Pl45m4 ????? I don't have such variables c'tor and d'tor

[artwaw]

@timob256 c'tor - constructor, d'tor - destructor.
Not vars but methods and yes, you have them.

[mpergand]

@timob256 said in how to attach class to qt project without ui file?:

QGridLayout *mainLayout = new QGridLayout;

oknonastr = new Widgets::OknoNastroek(this);

mainLayout->addWidget(oknonastr);
mainLayout->addWidget(display);

You're missing something ;)
Find a perfect example for you:
https://github.com/HBPVIS/Servus/blob/master/apps/servusBrowser.cpp

[timob256]

@mpergand

OknoWibora::OknoWibora(QWidget *parent)
: QMainWindow(parent)
{
// QGridLayout *mainLayout = new QGridLayout;
// oknonastr = new Widgets::OknoNastroek(this);
// mainLayout->addWidget(oknonastr);
// mainLayout->addWidget(display);

QGridLayout *mainLayout = new QGridLayout;
oknonastr = new Widgets::OknoNastroek(this);
mainLayout->addWidget(oknonastr);

}

the code works but not as I need it, the turquoise square does not stretch, in a separate project it is perfectly stretched to the specified values :(

[mpergand]

@timob256

OK, I explain in details:

When you don't use an UI from the Designer, you need to:

1. set the central widget
2. add a layout to the central widget
3. add others widgets to the layout

QWidget* centralWidget= new QWidget;
setCentralWidget(centralWidget);
QBoxLayout* layout= new QVBoxLayout;
centralWidget->setLayout(layout);
layout->addWidget( *yourTurquoiseWidget*);

[JonB]

@timob256
@mpergand has explained. Just to add, setCentralWidget() is a QMainWindow thing only.

[timob256]

@timob256 said in how to attach class to qt project without ui file?:

@mpergand

OknoWibora::OknoWibora(QWidget *parent)
: QMainWindow(parent)
{
// QGridLayout *mainLayout = new QGridLayout;
// oknonastr = new Widgets::OknoNastroek(this);
// mainLayout->addWidget(oknonastr);
// mainLayout->addWidget(display);

QGridLayout *mainLayout = new QGridLayout;
oknonastr = new Widgets::OknoNastroek(this);
mainLayout->addWidget(oknonastr);

}

the code works but not as I need it, the turquoise square does not stretch, in a separate project it is perfectly stretched to the specified values :(

this work
thsanks mpergand

[jsulm]

@timob256 said in how to attach class to qt project without ui file?:

mainLayout

You did not add this layout to any widget or other layout. Don't know how this can work...