[Qt练习]QMainWindow

mainview.h

#ifndef MAINVIEW_H
#define MAINVIEW_H
#include <QMainWindow>
class QTextEdit;
class QMenuBar;
class QLabel;
class QAction;
class QToolBar;
class QMenuBar;
class QStatusBar;
class QDockWidget;
class QPushButton;
class MainView:public QMainWindow
{
    Q_OBJECT
 public:
    MainView(QWidget* parent = 0);

public slots:
    void slot_toolbar_cmd1();
    void slot_toolbar_cmd3();
    void slot_toolbar_cmd2();
    void slot_press_ok_btn();

private:
    QMenuBar *pmenuBar;
    QTextEdit *textEdit;
    QMenu *fileMenu;
    QMenu *editMenu;
    QMenu *aboutMenu;
    QToolBar *toolbar;
    QAction *fileAction;
    QStatusBar *pStatusBar;
    QDockWidget *dockWidget;
    QPushButton *btnDockWidget;
};

#endif // MAINVIEW_H

mainview.cpp

#include <QTextEdit>
#include <QMenu>
#include <QToolBar>
#include <QStatusBar>
#include <QDockWidget>
#include <QString>
#include <QAction>
#include <QMenuBar>
#include <QPushButton>
#include "mainview.h"

MainView::MainView(QWidget *parent):QMainWindow(parent)
{
    //文字编辑区
    textEdit = new QTextEdit;
    textEdit->setFocus();
    setCentralWidget(textEdit);

    //menu
    fileMenu = new QMenu("&File");
    fileAction = new QAction("Open..", fileMenu);

    //add a shortcut
    fileAction->setShortcut(Qt::CTRL + Qt::Key_O);
    fileMenu->addAction(fileAction);
    fileMenu->addAction("Save");
    fileMenu->addAction("Save as..");

    //space line
    fileMenu->addSeparator();

    //Menu edit
    editMenu = new QMenu("&Edit");
    editMenu->addAction("Cut");
    editMenu->addAction("Copy");
    editMenu->addAction("Paste");

    //Menu About
    aboutMenu = new QMenu("&About");
    aboutMenu->addAction("About");

    //add Menu
    pmenuBar = menuBar();
    pmenuBar->addMenu(fileMenu);
    pmenuBar->addMenu(editMenu);
    pmenuBar->addMenu(aboutMenu);

    //toolbar
    toolbar = new QToolBar("QtoolBar");
    QAction *actionCmd1 = new QAction("cmd1",this);
    QAction *actionCmd2 = new QAction("cmd2",this);
    QAction *actionCmd3 = new QAction("cmd3", this);

    toolbar->addAction(actionCmd1);
    toolbar->addAction(actionCmd2);
    toolbar->addAction(actionCmd3);
    this->addToolBar(toolbar);

    connect(actionCmd1,SIGNAL(triggered()),this, SLOT(slot_toolbar_cmd1()));
    connect(actionCmd2,SIGNAL(triggered()),this, SLOT(slot_toolbar_cmd2()));
    connect(actionCmd3,SIGNAL(triggered()),this, SLOT(slot_toolbar_cmd3()));

    //statusbar
    pStatusBar = statusBar();
    pStatusBar->showMessage("see me statusBar");

    //button
    btnDockWidget = new QPushButton("ok");

    //DockWidget
    dockWidget = new QDockWidget("QDockWidget");
    dockWidget->setWidget(btnDockWidget);
    connect(btnDockWidget,SIGNAL(clicked()),this, SLOT(slot_press_ok_btn()));
    addDockWidget(Qt::RightDockWidgetArea,dockWidget);
}
void MainView::slot_press_ok_btn()
{ static int i = 0;
    QString str;
    str.sprintf("you press ok btn %d times", i++);
    textEdit->setText(str);
    pStatusBar->showMessage(str);
}

void MainView::slot_toolbar_cmd1()
{
    textEdit->setText("you press toolbar cmd1");
    pStatusBar->showMessage("cmd1");
}

void MainView::slot_toolbar_cmd2()
{
    textEdit->setText("you press toolbar cmd2");
    pStatusBar->showMessage("cmd2");
}

void MainView::slot_toolbar_cmd3()
{
    textEdit->setText("you press toolbar cmd3");
    pStatusBar->showMessage("cmd3");
}

 

main.cpp

#include <QApplication>
#include "mainview.h"

int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
    MainView *mainview = new MainView;
    mainview->setWindowTitle("MainWindow test");
    mainview->resize(500,300);
    mainview->show();
    return app.exec();
}

运行效果图