Add QWidget containing other QWidgets onto QMainWindow

ChajusSaib

Hello there,

I would like to add a class that inherits QWidget and contains QLineEdit, QPushButton... to a QMainWindow.

When I do this however and call show() on the widgets there is a problem, they all have their own windows instead of being on the QMainWindow.

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

class SimpleStudyBox;

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);

private:
    SimpleStudyBox *simple;
};

#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "simplestudybox.h"
#include <QtWidgets>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    simple(new SimpleStudyBox())
{
    simple->show();
    setCentralWidget(simple);
}

simplestudybox.h

#ifndef SIMPLESTUDYBOX_H
#define SIMPLESTUDYBOX_H

#include <QWidget>

class QLineEdit;
class QPushButton;
class QTextEdit;

class SimpleStudyBox : public QWidget
{
    Q_OBJECT
public:
    explicit SimpleStudyBox(QWidget *parent = 0);

private slots:
    void SHButtonClicked();

private:
    void setupActions();

    QLineEdit *title;
    QPushButton *show_hide;
    QTextEdit *desc;
};

#endif // SIMPLESTUDYBOX_H

simplestudybox.cpp

#include "simplestudybox.h"
#include <QtWidgets>

SimpleStudyBox::SimpleStudyBox(QWidget *parent) : QWidget(parent), title(new QLineEdit()),
    show_hide(new QPushButton()), desc(new QTextEdit())
{
    connect(show_hide, SIGNAL(clicked()), this, SLOT(SHButtonClicked()));
    centralLayout = new QGridLayout;
    centralLayout->addWidget(title);
    centralLayout->addWidget(show_hide);
    centralLayout->addWidget(desc);
    title->show();
    show_hide->show();
    desc->show();
}

void SimpleStudyBox::SHButtonClicked()
{
    if (show_hide->text() == "Hide")
    {
        show_hide->setText("Show");
        desc->hide();
    }
    else
    {
        show_hide->setText("Hide");
        desc->show();
    }
}

SGaist

Hi,

You are not setting centralLayout as the layout of your SimpleStudyBox. And if you are using a layout to handle these and it's set properly, you don't need to call show on each of them, that will be done automatically.

ChajusSaib

Thanks!

#include "simplestudybox.h"
#include <QtWidgets>

SimpleStudyBox::SimpleStudyBox(QWidget *parent) : QWidget(parent), title(new QLineEdit()),
    show_hide(new QPushButton()), desc(new QTextEdit())
{
    connect(show_hide, SIGNAL(clicked()), this, SLOT(SHButtonClicked()));

    QGridLayout *centralLayout = new QGridLayout;
    centralLayout->addWidget(title);
    centralLayout->addWidget(show_hide);
    centralLayout->addWidget(desc);

    setLayout(centralLayout);
}

void SimpleStudyBox::SHButtonClicked()
{
    if (show_hide->text() == "Hide")
    {
        show_hide->setText("Show");
        desc->hide();
    }
    else
    {
        show_hide->setText("Hide");
        desc->show();
    }
}

SGaist

You'r welcome !

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