tablewidget does not resize with the containing tabwidget in a window?

cdwijs

Hi All,
I'm trying to create a program with a tabWidget where each tab is an instance of a series of nexted V and HboxLayouts. I managed to get a tabwidget that resizes with the main window, but the qtablewidget inside does not resize.
I've made a small program that shows this in action:

//mywidget.cpp
#include "mywidget.h"
mywidget::mywidget(QWidget *parent) : QWidget(parent)
{
   myTableWidget = new QTableWidget(this); //does not resize?
}

//mywidget.h
#ifndef MYWIDGET_H
#define MYWIDGET_H
#include <QtWidgets>
#include <QWidget>
class mywidget : public QWidget
{
public:
    mywidget(QWidget *parent);
private:
    QTableWidget *myTableWidget;
};
#endif // MYWIDGET_H

//mygui.cpp
#include "mygui.h"
#include "mywidget.h"
myGui::myGui(QWidget *parent) : QWidget(parent)
{
    QWidget *centralWidget = new QWidget();
    QVBoxLayout *layout = new QVBoxLayout;
    QTabWidget *tabwidget = new QTabWidget;
    tabwidget->addTab(new mywidget(this),"new tab");   
    layout->addWidget(tabwidget);
    centralWidget->setLayout(layout); 
    centralWidget->show();
}

//mygui.h
#ifndef MYGUI_H
#define MYGUI_H
#include <QtWidgets>
#include <QWidget>
class myGui : public QWidget
{
public:
    explicit myGui(QWidget *parent=0);
private:
};
#endif // MYGUI_H

//main.cpp
//#include "mainwindow.h"
#include <QApplication>
#include "mygui.h"
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    myGui gui;
    //   MainWindow w;
 //   w.show();
    return a.exec();
}

What have i missed?
Cheers,
Cedric

VRonin

you need to add the table to a layout:

//mywidget.cpp
#include "mywidget.h"
#include <QHBoxLayout>
mywidget::mywidget(QWidget *parent) : QWidget(parent)
{
   myTableWidget = new QTableWidget(this);
QHBoxLayout* mainLay=new QHBoxLayout(this);
mainLay->addWidget(myTableWidget );
}

cdwijs

Hi Vronin,
It works, thanks.
In the real program I'm working on, I have everything in H and V box layouts, but I wrongly placed the topmost layout in a QObject. Then the resizing does not work anymore. Removing the Qobject and all calls to it solved the problem.
So this does not work:

QWidget *centralWidget = new QWidget(this);
QVBoxLayout *centralLayout = new QVBoxLayout(this);
centralLayout->addWidget(tableWidget);
centralLayout->addLayout(startLayout);
centralLayout->addLayout(twiDownLayout);
centralLayout->addLayout(twiLayout);
centralLayout->addLayout(cyclLayout);
centralWidget->setLayout(centralLayout);
centralWidget->show();

This works:

QVBoxLayout *centralLayout = new QVBoxLayout(this);
centralLayout->addWidget(tableWidget);
centralLayout->addLayout(startLayout);
centralLayout->addLayout(twiDownLayout);
centralLayout->addLayout(twiLayout);
centralLayout->addLayout(cyclLayout);