QT + + using standard dialog box on issues + + file dialog box

#include " mainwindow.h " 
#include <QMenuBar> 
#include <QMenu> 
#include <QAction> 
#include <QDialog> 
#include <QDebug> 

#include <QMessageBox> 
#include <QFileDialog> 
MainWindow :: MainWindow (QWidget * parent ) 
    : The QMainWindow (parent) 
{ 

    QMenuBar * = mBar the menuBar (); 
    setMenuBar (mBar); 
    The QMenu * = mBar- MENU> AddMenu ( " box " ); 

    // use dialog
     // About box
    * P3 = menu- QAction> addAction ( " About Box " ); 
    Connect (p3, & QAction :: triggered, [= ] () { 

        / * After viewing QmessageBox help documentation, which the Static Public Members, to see inside about use function 
         * static Public members learned from its static member function, here it comes to static member function call inside the class by class name that is invoked;. 
         * the last call as follows: 
         * :: QMessageBox the About ( this, "about", "on QT"); 
         * 
        * / 
        a QMessageBox :: About ( the this , " About " , " on QT " ); 
    }); 

    // problem dialog 
    The QAction * P4 = Menu-> the addAction ( "Question dialog "); 
    Connect (P4, & QAction :: triggered, [= ] () {
         / * process of creating problems here and dialog on a similar, but there is a need to pay attention, there are two buttons on top of the dialog box questions, 
         * how know what I clicked on a button? 
         * QMessageBox by looking at the help documentation, StandardButton contents inside Public Types inside, you can see different buttons enumeration of 
         * that it will return a value, so we define a value for receiving as follows: 
         ( "? the ARE YOU the OK" the this, "Question",) * = int RET QMessageBox :: Question; 
         * 
         * of course, sometimes we do not want only two buttons YES and NO, there is also can be changed change the code is as follows: 
         * int = RET QMessageBox :: Question (the this, "Question", "the OK the aRE YOU?", the OK QMessageBox :: | :: QMessageBox the Cancel); 
         * this time inside the button turns OK button and a cancel button. 
        * / 
          int RET = QMessageBox :: Question ( the this , "question","ARE YOU OK ?");
            switch(ret)
            {
                case QMessageBox::Yes:
                qDebug()<<"I am OK ";
                break;
            case QMessageBox::No:
                qDebug()<<"NO OK";
                break;
            default:
                break;
            }
    });

    //文件对话框
    QAction *p5 = menu->addAction(" File Dialog " ); 
    Connect (P5, & The QAction :: triggered, [= ] () { 

        / * open a file, the display content, display path, 
         * getOpenFileName By examining the contents inside, (which in fact has been written examples) 
         * QFileDialog :: getOpenFileName (the this, "Open", "../"); have a return value, 
         * = QFileDialog :: getOpenFileName QString path (the this, "Open", "../"); 
         * ? If you want to open the specified file format how to write 
         * Note: when you want to open a variety of file types, using two ;; to represent 
         * 
        * / 
        QString path = QFileDialog :: getOpenFileName ( the this , " open " , " ../ " , " Source (. * cpp * .h);;Text(*.txt);;all(*.*)");
        qDebug()<<path;
    });

}

MainWindow::~MainWindow()
{

}

 getOpenFileName ( the this, " Open ", " ../ ", " Source (CPP * * .h) ;; the Text (* TXT) ;; All (* *)... " ); the " Source (*. * .h cpp) ;; Text (*. TXT) ;; All (*. *) " a very long time, you can ;; press enter after wrap, this operation in QT there is no problem.

 

MAINWINDOW_H #ifndef
 #define MAINWINDOW_H 

#include <The QMainWindow> 
#include <QDialog>
 class the MainWindow: public The QMainWindow 
{ 
    the Q_OBJECT 

public : 
    the MainWindow (the QWidget * parent = 0 );
     ~ the MainWindow (); 
     QDialog DLG; // custom global variables ( member variables) 
}; 

#endif  // MAINWINDOW_H