Adding Custom QWidget to QMainWindow

Alatriste

Hello.

I have QMainWindow based class GWindow with *.ui and also have custom QWidget based class Frame and I want to add Frame object to GWindow.

GWindow ::GWindow (QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);
    setWindowFlags(Qt::FramelessWindowHint);
  
    FrameObject.show();
    this->setCentralWidget(&FrameObject);
}

and Frame class . I added QPushButton for Frame UI in Qt Designer

class Frame : public QWidget
{
    Q_OBJECT

public:
    Frame (QWidget *parent = 0);
    ~Frame ();

private:
    Ui::Frame ui;
};

Frame ::Frame (QWidget *parent)
    : QWidget(parent)
{
  ui.setupUi(this);
}

raven-worx

what is FrameObject?
Where and how is it defined?

Alatriste

@raven-worx said:

is FrameObject?
Where and how is it defined?

into GWindow header

class GWindow : public QMainWindow
{
    Q_OBJECT

public:
    GWindow (QWidget *parent = 0);
    ~GWindow ();

private:
    Ui::SandBoxClass ui;
    Frame FrameObject;    
};

raven-worx

@Alatriste
the issue has to be somewhere in the code you haven't posted yet. :)

Alatriste

@raven-worx

Now WindowTitle instead of Frame and Sandbox intead of GWindow

class WindowTitle : public QWidget
{
    Q_OBJECT

public:
    WindowTitle(QWidget *parent = 0);
    ~WindowTitle();

private:
    Ui::WindowTitle ui;
};


WindowTitle::WindowTitle(QWidget *parent)
    : QWidget(parent)
{
  ui.setupUi(this);
}

WindowTitle::~WindowTitle()
{

}

#include <QtWidgets/QMainWindow>
#include "WindowTitle.h"
#include <QGridLayout>
#include "ui_SandBox.h"

class SandBox : public QMainWindow
{
    Q_OBJECT

public:
    SandBox(QWidget *parent = 0);
    ~SandBox();

private:
    Ui::SandBoxClass ui;
    
};

#include "SandBox.h"

SandBox::SandBox(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);
  
    setWindowFlags(Qt::FramelessWindowHint);

    QWidget * widget = new QWidget;
    QGridLayout * layout = new QGridLayout;
    WindowTitle * w = new WindowTitle;
    
    w->show();
    layout->addWidget(w,0,0,1,1);
    widget->setLayout(layout);
    setCentralWidget(widget);
}

kshegunov

@Alatriste
Hello,

What about:

SandBox::SandBox(QWidget * parent)
    :  QMainWindow(parent, Qt::FramelessWindowHint)
{
    ui.setupUi(this);

    Ui::WindowTitle titleUi;  //< This could be put as a class member as well
    titleUi.setupUi(centralWidget());
}

You don't seem to be doing anything special with your WindowTitle class, so no need to derive QWidget only to set up a form.

Kind regards.

Alatriste

@kshegunov

But If I want use not fixed size widgets? How can I resize Ui::WindowTitle titleUi; custom widget?

I want to set size dynamically, for example:

mywidget->setGeometry(0,0,  parentWidget.widht(), 100);

kshegunov

@kshegunov
Hello,
Ui::WindowTitle is your form class and not a widget. The widget I'm suggesting you initialize with it is the central widget of the main window, and the central widget will be resized automatically to fit the client area of the window.

mywidget->setGeometry(0,0, parentWidget.widht(), 100);

You shouldn't be wanting to do that. Just put the appropriate layout and setup your widgets in the designer. If any of them is fixed size put that in the appropriate properties of the object (the right side of the designer, after clicking on an object).

Kind regards.