在QT4中使用类似QVBox类似功能

最新推荐文章于 2025-02-11 21:33:53 发布

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最新推荐文章于 2025-02-11 21:33:53 发布

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文章标签： qt layout signal each

本文介绍如何在QT4中使用QVBoxLayout来替代已废弃的QVBox类，通过示例展示了如何创建垂直布局的部件。

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在QT4中使用类似QVBox类似功能

QVBox在Qt 3.0的是这样子的：

    
     
     /*
     ***************************************************************
**
** Qt教程一 - 3
**
***************************************************************
     */
     

#include 
     <
     qapplication.h
     >
     
#include 
     <
     qpushbutton.h
     >
     
#include 
     <
     qfont.h
     >
     
#include 
     <
     qvbox.h
     >
     


     int
      main( 
     int
      argc, 
     char
      
     **
     argv )
{
    QApplication a( argc, argv );

    QVBox box;
    box.resize( 
     200
     , 
     120
      );

    QPushButton quit( 
     "
     Quit
     "
     , 
     &
     box );
    quit.setFont( QFont( 
     "
     Times
     "
     , 
     18
     , QFont::Bold ) );

    QObject::connect( 
     &
     quit, SIGNAL(clicked()), 
     &
     a, SLOT(quit()) );

    a.setMainWidget( 
     &
     box );
    box.show();

    
     return
      a.exec();
}

在4.3中已经没有QVBox这个类了：

-------------------------------------------------------------------------------------------------------------------------------------------------------

QVBox

The QVBox class is now only available as Q3VBox in Qt 4. You can achieve the same result as QVBox by creating a QWidget with a vertical layout:

For example, if you have code like：

   
    
     QVBox 
    *
    vbox 
    =
     
    new
     QVBox;
 QPushButton 
    *
    child1 
    =
     
    new
     QPushButton(vbox);
 QPushButton 
    *
    child2 
    =
     
    new
     QPushButton(vbox);

you can rewrite it as：

    
     
     QWidget 
     *
     vbox 
     =
      
     new
      QWidget;
 QPushButton 
     *
     child1 
     =
      
     new
      QPushButton;
 QPushButton 
     *
     child2 
     =
      
     new
      QPushButton;
 QVBoxLayout 
     *
     layout 
     =
      
     new
      QVBoxLayout;
 layout
     ->
     addWidget(child1);
 layout
     ->
     addWidget(child2);
 vbox
     ->
     setLayout(layout);

Note that child widgets are not automatically placed into the widget's layout; you will need to manually add each widget to the QVBoxLayout.

-------------------------------------------------------------------------------------------------------------------------------------------------------

我写滴...

    
     
     /*
     ***************************************************************
**
** Qt教程一 - 3
**
***************************************************************
     */
     

#include 
     <
     qapplication.h
     >
     
#include 
     <
     qpushbutton.h
     >
     
#include 
     <
     qfont.h
     >
     
#include 
     <
     qboxlayout.h
     >
     


     int
      main( 
     int
      argc, 
     char
      
     **
     argv )
{
    QApplication a( argc, argv );

    QWidget window;
    window.resize(
     200
     ,
     120
     );

    QVBoxLayout layout;
    QPushButton quit( 
     "
     Quit
     "
     , 
     &
     window );
    quit.setFont( QFont( 
     "
     Times
     "
     , 
     18
     , QFont::Bold ) );
    QObject::connect( 
     &
     quit, SIGNAL(clicked()), 
     &
     a, SLOT(quit()) );

    layout.addWidget(
     &
     quit);
    
    window.setLayout(
     &
     layout);
    window.show();

    
     return
      a.exec();
}