1.0

MainWindow.h

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include<QMainWindow>

#include<QAction>

#include<QMenu>

#include<QTextBrowser>

class MainWindow : public QMainWindow{

    Q_OBJECT

public:

    MainWindow();

private slots:

    void fNew();

    void fClose();

private:

    void SetupMenus();

    void SetupEditor();

    QTextBrowser *edit;

    QAction *newAction;

    QAction *closeAction;

    QMenu *file;

};

#endif // MAINWINDOW_H

MainWindow.CPP

#include<QtGui>

#include"MainWindow.h"

MainWindow::MainWindow(){

    QWidget *widget=new QWidget;

    setCentralWidget(widget);

    /*QWidget *topfiller=new QWidget;

    topfiller->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);

    QWidget *bottomFiller=new QWidget;

    bottomFiller->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);*/

    SetupEditor();

    QVBoxLayout *layout=new QVBoxLayout;

    /*layout->addWidget(topFiller);

    layout->addWidget(bottomFiller);*/

    layout->addWidget(edit);

    widget->setLayout(layout);

    widget->setLayout(layout);

    SetupMenus();

    setWindowTitle(tr("Main Window"));

    setMinimumSize(256,256);

    resize(512,480);

}

void MainWindow::SetupMenus(){

    newAction=new QAction(tr("&New"),this);

    newAction->setShortcut(QKeySequence::New);

    connect(newAction,SIGNAL(triggered()),this,SLOT(fNew()));

    closeAction=new QAction(tr("E&xit"),this);

    closeAction->setShortcut(QKeySequence::Close);

    connect(closeAction,SIGNAL(triggered()),this,SLOT(fClose()));

    file=menuBar()->addMenu(tr("&File"));

    file->addAction(newAction);

    file->addAction(closeAction);

}

void MainWindow::fNew(){

    edit->clear();

}

void MainWindow::fClose(){

    this->close();

}

void MainWindow::SetupEditor(){

    edit=new QTextBrowser;

    edit->setAcceptRichText(true);

    edit->setAutoFormatting(QTextBrowser::AutoNone);

    edit->setCursorWidth(1);

    edit->setDocumentTitle(tr("new Document"));

    edit->setCursorWidth(16);

    edit->setReadOnly(false);

    edit->setEnabled(true);

}

Main.CPP

#include<QApplication>

#include"MainWindow.h"

int main(int argc,char* argv[]){

    QApplication app(argc,argv);

    MainWindow wnd;

    wnd.show();

    app.exec();

}

2.0

MainWindow.h

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include<QMainWindow>

#include<QAction>

#include<QMenu>

#include<QTextBrowser>

#include<QPushButton>

class QHBoxLayout;

class MainWindow : public QMainWindow{

    Q_OBJECT

public:

    MainWindow();

private slots:

    void fNew();

    void fClose();

private:

    void SetupMenus();

    void SetupEditor();

    QTextBrowser *edit;

    QPushButton *newBtn;

    QPushButton *exit;

    QAction *newAction;

    QAction *closeAction;

    QMenu *file;

    QHBoxLayout *btnBox;

};

#endif // MAINWINDOW_H

MainWindow.CPP

#include<QtGui>

#include"MainWindow.h"

MainWindow::MainWindow(){

    QWidget *widget=new QWidget;

    setCentralWidget(widget);

    SetupEditor();

    QVBoxLayout *layout=new QVBoxLayout;

    layout->addLayout(btnBox);

    layout->addWidget(edit);

    widget->setLayout(layout);

    widget->setLayout(layout);

    SetupMenus();

    setWindowTitle(tr("Main Window"));

    setMinimumSize(256,256);

    resize(512,480);

}

void MainWindow::SetupMenus(){

    newAction=new QAction(tr("&New"),this);

    newAction->setShortcut(QKeySequence::New);

    connect(newAction,SIGNAL(triggered()),this,SLOT(fNew()));

    closeAction=new QAction(tr("E&xit"),this);

    closeAction->setShortcut(QKeySequence::Close);

    connect(closeAction,SIGNAL(triggered()),this,SLOT(fClose()));

    file=menuBar()->addMenu(tr("&File"));

    file->addAction(newAction);

    file->addAction(closeAction);

}

void MainWindow::fNew(){

    edit->clear();

}

void MainWindow::fClose(){

    this->close();

}

void MainWindow::SetupEditor(){

    newBtn=new QPushButton(tr("new"),this);

    newBtn->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Fixed);

    connect(newBtn,SIGNAL(clicked()),this,SLOT(fNew()));

    exit=new QPushButton(tr("exit"),this);

    exit->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Fixed);

    connect(exit,SIGNAL(clicked()),this,SLOT(fClose()));

    edit=new QTextBrowser;

    edit->setAcceptRichText(true);

    edit->setAutoFormatting(QTextBrowser::AutoNone);

    edit->setCursorWidth(1);

    edit->setDocumentTitle(tr("new Document"));

    edit->setCursorWidth(16);

    edit->setReadOnly(false);

    edit->setEnabled(true);

    btnBox=new QHBoxLayout;

    btnBox->addWidget(newBtn);

    btnBox->addWidget(exit);

}

Main.cpp

#include<QApplication>

#include"MainWindow.h"

int main(int argc,char* argv[]){

    QApplication app(argc,argv);

    MainWindow wnd;

    wnd.show();

    app.exec();

}