how to resize Qmainwindow with Qwidget ?

[zeynepb.bil]

I have trayicon on Qdialog, also I have a webview on Qmainwindow. I want to do that a web page run like tray. The codes run perfectly but i have a problem with the window size. when I maximize the page on tray, the web page is smaller than qwidget.

//main.cpp
#include "window.h"  //the object inherited by Qdialog
#include "mainwindow.h" //the object inherited by Qmainwindow
 
int main(int argc, char *argv[])
{
 QApplication app(argc, argv);
    Window box;
    MainWindow window;
    window.setParent(&box);
 
    return app.exec();
}
 
//window.cpp
Window::Window()
{
    createActions();
    createTrayIcon();
    setIcon();
/*..*/
 
    trayIcon->show();
    setWindowTitle(tr("Blog Search"));
    resize(600, 600);
}
MainWindow::MainWindow()
{
    QTime time = QTime::currentTime();
    qsrand((uint)time.msec());
    int randomValue = qrand() % 999;
    view = new QWebView(this);
 
    QUrl url = QUrl::fromEncoded("http://blogsearch.google.com/blogsearch?hl=tr&ie=UTF-8&q=C%2B%2B&&output=rss");
    url.addQueryItem("num", "1");
    url.addQueryItem("start" ,QString::number(randomValue));
    view->load(url);
 
   /* ...... */
 
   setCentralWidget(view);
}
/*
all the functions here
*/

//main.cpp
#include "window.h"  //the object inherited by Qdialog
#include "mainwindow.h" //the object inherited by Qmainwindow

int main(int argc, char *argv[])
{
 QApplication app(argc, argv);
    Window box;
    MainWindow window;
    window.setParent(&box);

    return app.exec();
}

//window.cpp
Window::Window()
{
    createActions();
    createTrayIcon();
    setIcon();
/*..*/

    trayIcon->show();
    setWindowTitle(tr("Blog Search"));
    resize(600, 600);
}
MainWindow::MainWindow()
{
    QTime time = QTime::currentTime();
    qsrand((uint)time.msec());
    int randomValue = qrand() % 999;
    view = new QWebView(this);

    QUrl url = QUrl::fromEncoded("http://blogsearch.google.com/blogsearch?hl=tr&ie=UTF-8&q=C%2B%2B&&output=rss");
    url.addQueryItem("num", "1");
    url.addQueryItem("start" ,QString::number(randomValue));
    view->load(url);

   /* ...... */

   setCentralWidget(view);
}
/*
all the functions here
*/

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some of the codes above.
Can you help me about what can I do for resize the mainwindow ?

[Lykurg]

You have to put MainWindow into the layout of Window.

[zeynepb.bil]

I'm new in Qt. So can you explain more ? If I add a new window to apllication am I alway use a layout ?

[Lykurg]

Since I don't understand your design exactely, please provide a minimal compilable example reproducing your problem.

[zeynepb.bil]

//main.cpp
#include <QtGui>
 
#include "window.h"
#include "mainwindow.h"
 
int main(int argc, char *argv[])
{
    Q_INIT_RESOURCE(systray);
 
    QApplication app(argc, argv); 
    QApplication::setQuitOnLastWindowClosed(false);
 
    Window box;
 
    MainWindow window;
    window.setParent(&box);
    return app.exec();
}
 
//mainwindow.cpp
#include <QtGui>
 
class QWebView;
 
 
//! [1]
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    MainWindow();
 
private:
    QString jQuery;
    QWebView *view;
 
};
 
//window.h
#ifndef WINDOW_H
#define WINDOW_H
 
#include <QDialog>
#include <QSystemTrayIcon>
#include <QMenu>
#include <QLineEdit>
#include <QTextEdit>
 
 
class Window : public QDialog
{
    Q_OBJECT
public:
    Window();
 
private slots:
    void setIcon();
    void iconActivated(QSystemTrayIcon::ActivationReason reason);
    void showMessage();
 
private:
    void createActions();
    void createTrayIcon();
 
 
    QAction *minimizeAction;
    QAction *maximizeAction;
    QAction *restoreAction;
    QAction *quitAction;
    QLineEdit *titleEdit;
    QTextEdit *bodyEdit;
 
    QSystemTrayIcon *trayIcon;
    QMenu *trayIconMenu;
 
 
};
 
#endif
 
//window.cpp
 
#include <QtGui>
#include <QtWebKit>
#include <QTime>
 
#include "window.h"
#include "mainwindow.h" 
 
Window::Window()
{
    createActions();
    createTrayIcon();
    setIcon();
 
    connect(trayIcon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
            this, SLOT(iconActivated(QSystemTrayIcon::ActivationReason)));
 
 
    trayIcon->show();
    setWindowTitle(tr("Blog Search"));
    resize(600, 600);
}
MainWindow::MainWindow()
{
 
    QFile file;
    file.setFileName(":/jquery.min.js");
    file.open(QIODevice::ReadOnly);
    jQuery = file.readAll();
    file.close();
 
 
    QNetworkProxyFactory::setUseSystemConfiguration(true);
 
 
    QTime time = QTime::currentTime();
    qsrand((uint)time.msec());
    int randomValue = qrand() % 999;
    view = new QWebView(this);
 
    QUrl url = QUrl::fromEncoded("http://blogsearch.google.com/blogsearch?hl=tr&ie=UTF-8&q=C%2B%2B&&output=rss");
    url.addQueryItem("num", "1");
    url.addQueryItem("start" ,QString::number(randomValue));
    view->load(url);
 
 
    setCentralWidget(view);
    }
 
 void Window::setIcon()
{
    QIcon icon;
    icon.addPixmap(QPixmap(":/images/heart.svg"));
    trayIcon->setIcon(icon);
    trayIcon->setVisible(true);
    setWindowIcon(icon);
 
}
void Window::iconActivated(QSystemTrayIcon::ActivationReason reason)
{
    switch (reason) {
        case QSystemTrayIcon::Trigger:
        break;
        case QSystemTrayIcon::DoubleClick:
            showNormal();
        break;
        case QSystemTrayIcon::MiddleClick:
            showMessage();
        break;
        default:
        ;
    }
}
 
void Window::showMessage()
{
    titleEdit = new QLineEdit(tr("Blog Search"));
    bodyEdit = new QTextEdit;
    bodyEdit->setPlainText(trUtf8("Blog okumak icin sag click + Maximize\n yapmaniz yeterli"));
 
    trayIcon->showMessage(titleEdit->text(), bodyEdit->toPlainText(), QSystemTrayIcon::Information,
                         1000);
}
 
void Window::createActions()
{
    minimizeAction = new QAction(tr("Mi&nimize"), this);
    connect(minimizeAction, SIGNAL(triggered()), this, SLOT(hide()));
 
    maximizeAction = new QAction(tr("Ma&ximize"), this);
    connect(maximizeAction, SIGNAL(triggered()), this, SLOT(showMaximized()));
 
    restoreAction = new QAction(tr("&Restore"), this);
    connect(restoreAction, SIGNAL(triggered()), this, SLOT(showNormal()));
 
    quitAction = new QAction(tr("&Quit"), this);
    connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
}
 
void Window::createTrayIcon()
{
    trayIconMenu = new QMenu(this);
    trayIconMenu->addAction(minimizeAction);
    trayIconMenu->addAction(maximizeAction);
    trayIconMenu->addAction(restoreAction);
    trayIconMenu->addSeparator();
    trayIconMenu->addAction(quitAction);
 
    trayIcon = new QSystemTrayIcon(this);
    trayIcon->setContextMenu(trayIconMenu);
}

//main.cpp
#include <QtGui>
 
#include "window.h"
#include "mainwindow.h"
 
int main(int argc, char *argv[])
{
    Q_INIT_RESOURCE(systray);
 
    QApplication app(argc, argv); 
    QApplication::setQuitOnLastWindowClosed(false);
 
    Window box;
 
    MainWindow window;
    window.setParent(&box);
    return app.exec();
}
 
//mainwindow.cpp
#include <QtGui>
 
class QWebView;

 
//! [1]
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    MainWindow();
  
private:
    QString jQuery;
    QWebView *view;
   
};
 
//window.h
#ifndef WINDOW_H
#define WINDOW_H
 
#include <QDialog>
#include <QSystemTrayIcon>
#include <QMenu>
#include <QLineEdit>
#include <QTextEdit>
 
 
class Window : public QDialog
{
    Q_OBJECT
public:
    Window();
 
private slots:
    void setIcon();
    void iconActivated(QSystemTrayIcon::ActivationReason reason);
    void showMessage();
 
private:
    void createActions();
    void createTrayIcon();
 
 
    QAction *minimizeAction;
    QAction *maximizeAction;
    QAction *restoreAction;
    QAction *quitAction;
    QLineEdit *titleEdit;
    QTextEdit *bodyEdit;
 
    QSystemTrayIcon *trayIcon;
    QMenu *trayIconMenu;
 
 
};
 
#endif
 
//window.cpp

#include <QtGui>
#include <QtWebKit>
#include <QTime>
 
#include "window.h"
#include "mainwindow.h" 
 
Window::Window()
{
    createActions();
    createTrayIcon();
    setIcon();
 
    connect(trayIcon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
            this, SLOT(iconActivated(QSystemTrayIcon::ActivationReason)));
 
 
    trayIcon->show();
    setWindowTitle(tr("Blog Search"));
    resize(600, 600);
}
MainWindow::MainWindow()
{
     
    QFile file;
    file.setFileName(":/jquery.min.js");
    file.open(QIODevice::ReadOnly);
    jQuery = file.readAll();
    file.close();
 
 
    QNetworkProxyFactory::setUseSystemConfiguration(true);
 
 
    QTime time = QTime::currentTime();
    qsrand((uint)time.msec());
    int randomValue = qrand() % 999;
    view = new QWebView(this);
 
    QUrl url = QUrl::fromEncoded("http://blogsearch.google.com/blogsearch?hl=tr&ie=UTF-8&q=C%2B%2B&&output=rss");
    url.addQueryItem("num", "1");
    url.addQueryItem("start" ,QString::number(randomValue));
    view->load(url);
 
  
    setCentralWidget(view);
    }
 
 void Window::setIcon()
{
    QIcon icon;
    icon.addPixmap(QPixmap(":/images/heart.svg"));
    trayIcon->setIcon(icon);
    trayIcon->setVisible(true);
    setWindowIcon(icon);
 
}
void Window::iconActivated(QSystemTrayIcon::ActivationReason reason)
{
    switch (reason) {
        case QSystemTrayIcon::Trigger:
        break;
        case QSystemTrayIcon::DoubleClick:
            showNormal();
        break;
        case QSystemTrayIcon::MiddleClick:
            showMessage();
        break;
        default:
        ;
    }
}
 
void Window::showMessage()
{
    titleEdit = new QLineEdit(tr("Blog Search"));
    bodyEdit = new QTextEdit;
    bodyEdit->setPlainText(trUtf8("Blog okumak icin sag click + Maximize\n yapmaniz yeterli"));
 
    trayIcon->showMessage(titleEdit->text(), bodyEdit->toPlainText(), QSystemTrayIcon::Information,
                         1000);
}
 
void Window::createActions()
{
    minimizeAction = new QAction(tr("Mi&nimize"), this);
    connect(minimizeAction, SIGNAL(triggered()), this, SLOT(hide()));
 
    maximizeAction = new QAction(tr("Ma&ximize"), this);
    connect(maximizeAction, SIGNAL(triggered()), this, SLOT(showMaximized()));
 
    restoreAction = new QAction(tr("&Restore"), this);
    connect(restoreAction, SIGNAL(triggered()), this, SLOT(showNormal()));
 
    quitAction = new QAction(tr("&Quit"), this);
    connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
}
 
void Window::createTrayIcon()
{
    trayIconMenu = new QMenu(this);
    trayIconMenu->addAction(minimizeAction);
    trayIconMenu->addAction(maximizeAction);
    trayIconMenu->addAction(restoreAction);
    trayIconMenu->addSeparator();
    trayIconMenu->addAction(quitAction);
 
    trayIcon = new QSystemTrayIcon(this);
    trayIcon->setContextMenu(trayIconMenu);
}

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[Lykurg]

Ok, you don't use layouts at all. Please read the doc about layouts: http://doc.trolltech.com/4.6/layout.html. Also I don't see a reason why you have a widget and a main window. You can put all into one! If you need different widgets inside a main window see QStackedWidget.

[zeynepb.bil]

Ok, you don't use layouts at all. Please read the doc about layouts: http://doc.trolltech.com/4.6/layout.html. Also I don't see a reason why you have a widget and a main window. You can put all into one! If you need different widgets inside a main window see QStackedWidget.

but I have to use QToolBar, so when I put all them in one widget an error occured. for example; addToolBar was not declared in this scope. That's why I prefer to use Qmainwindow.

[Lykurg]

Of course you should use QMainWindow, but why you then make another window called window? Should there be two windows?

[zeynepb.bil]

Of course you should use QMainWindow, but why you then make another window called window? Should there be two windows?

No, it should'nt. Firstly I tried it but can't do it one window then I did it like that. Now there is only one problem that; size of the window.
If it will be easier to do it in one window okay then I try it to do in one window.

[thanhpham288]

I'm a new QT. have same issue with @zeynepb.bil
https://i.imgur.com/WEBkimQ.png

Can you help me?

[d_stranz]

Put everything that is inside the QWidget "centralWidget" inside a layout of some sort. Look at the Qt Layout examples and follow the link on that page to Layout Management for the explanation of how it all works.