QT中封装的IP地址的widget

QT没有提供一个完整的IP地址控件，

1. 可以使用QLineEdit简单的实现

    QRegExp regExp( " ((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-5]|[01]?\\d\\d?) " );
    QRegExpValidator  * pValidator  =   new  QRegExpValidator(regExp,  this );
    QLineEdit  * lineEdit  =   new  QLineEdit( this );
    lineEdit -> setValidator( new  QRegExpValidator(pValidator,  this ));
    lineEdit -> setInputMask( " 000.000.000.000; " );

但是上面的输入时没有window的IP地址控件好用。所以自己就用4个QLineEdit封装了一个，用起来好多了，
下面是代码：

//  MyIpPartLineEdit.h
#pragma once

#include  < QLineEdit >

class  QWidget;
class  QFocusEvent;
class  QKeyEvent;

class  MyIpPartLineEdit :  public  QLineEdit
{
    Q_OBJECT
public :
    MyIpPartLineEdit(QWidget  * parent  =   0 );
     ~ MyIpPartLineEdit( void );

     void  set_nexttab_edit(QLineEdit  * nexttab) { next_tab_  =  nexttab; }

protected :
     virtual   void  focusInEvent(QFocusEvent  * e);
     virtual      void  keyPressEvent(QKeyEvent  * event );  

private  slots:
     void  text_edited( const  QString &  text);

private :
    QLineEdit  * next_tab_;
};

//  MyIpPartLineEdit.cpp
#include  " MyIpPartLineEdit.h "
#include  < QIntValidator >
#include  < QKeyEvent >

MyIpPartLineEdit::MyIpPartLineEdit(QWidget  * parent /*  = 0 */ )
: QLineEdit(parent)
{
    next_tab_  =  NULL;

     this -> setMaxLength( 3 );
     this -> setFrame( false );
     this -> setAlignment(Qt::AlignCenter);

    QValidator  * validator  =   new  QIntValidator( 0 ,  255 ,  this );
     this -> setValidator(validator);

    connect( this , SIGNAL(textEdited( const  QString & )),  this , SLOT(text_edited( const  QString & )));
}

MyIpPartLineEdit:: ~ MyIpPartLineEdit( void )
{
}

void  MyIpPartLineEdit::focusInEvent(QFocusEvent  * e)
{
     this -> selectAll();
    QLineEdit::focusInEvent(e);
}

void  MyIpPartLineEdit::keyPressEvent(QKeyEvent  * event )
{
     if  ( event -> key()  ==  Qt::Key_Period)
    {
         if  (next_tab_)
        {
            next_tab_ -> setFocus();
            next_tab_ -> selectAll();
        }
    }
    QLineEdit::keyPressEvent( event );
}

void  MyIpPartLineEdit::text_edited( const  QString &  text)
{
    QIntValidator v( 0 ,  255 ,  this );
    QString ipaddr  =  text;
     int  pos  =   0 ;
    QValidator::State state  =  v.validate(ipaddr, pos); 
     if  (state  ==  QValidator::Acceptable)
    {
         if  (ipaddr.size()  >   1 )
        {
             if  (ipaddr.size()  ==   2 )
            {
                 int  ipnum  =  ipaddr.toInt();
                
                 if  (ipnum  >   25 )
                {
                     if  (next_tab_)
                    {
                        next_tab_ -> setFocus();
                        next_tab_ -> selectAll();
                    }    
                }
            }
             else
            {
                 if  (next_tab_)
                {
                    next_tab_ -> setFocus();
                    next_tab_ -> selectAll();
                }    
            }
        }
    }
}

//  MyIpAddrEdit.h
#pragma once

#include  < QWidget >

class  QLineEdit;
class  QLabel;
class  MyIpPartLineEdit;

class  MyIpAddrEdit :  public  QWidget
{
    Q_OBJECT
public :
    MyIpAddrEdit(QWidget *  pParent  =   0 );
     ~ MyIpAddrEdit();

     void  settext( const  QString  & text);
    QString text();
     void  setStyleSheet( const  QString  & styleSheet);

signals:
     void  textchanged( const  QString &  text);
     void  textedited( const  QString  & text);

private  slots:
     void  textchangedslot( const  QString &  text);
     void  texteditedslot( const  QString  & text);

private :
    MyIpPartLineEdit  * ip_part1_;
    MyIpPartLineEdit  * ip_part2_;
    MyIpPartLineEdit  * ip_part3_;
    QLineEdit  * ip_part4_;

    QLabel  * labeldot1_;
    QLabel  * labeldot2_;    
    QLabel  * labeldot3_;
};

//  MyIpAddrEdit.cpp
#include  " MyIpAddrEdit.h "
#include  < QRegExpValidator >
#include  < QLabel >
#include  " MyIpPartLineEdit.h "

MyIpAddrEdit::MyIpAddrEdit(QWidget *  pParent  /*  = 0  */ )
: QWidget(pParent)
{
    ip_part1_  =   new  MyIpPartLineEdit( this );
    ip_part2_  =   new  MyIpPartLineEdit( this );
    ip_part3_  =   new  MyIpPartLineEdit( this );
    ip_part4_  =   new  MyIpPartLineEdit( this );

    labeldot1_  =   new  QLabel( this );
    labeldot2_  =   new  QLabel( this );
    labeldot3_  =   new  QLabel( this );

    ip_part1_ -> setGeometry(QRect( 0 ,  0 ,  30 ,  20 ));
    ip_part2_ -> setGeometry(QRect( 30 ,  0 ,  30 ,  20 ));
    ip_part3_ -> setGeometry(QRect( 60 ,  0 ,  30 ,  20 ));
    ip_part4_ -> setGeometry(QRect( 90 ,  0 ,  30 ,  20 ));

    labeldot1_ -> setText( "  . " );
    labeldot1_ -> setGeometry(QRect( 27 ,  1 ,  6 ,  18 ));
    labeldot1_ -> setAlignment(Qt::AlignCenter);

    labeldot2_ -> setText( "  . " );
    labeldot2_ -> setGeometry(QRect( 57 ,  1 ,  6 ,  18 ));
    labeldot2_ -> setAlignment(Qt::AlignCenter);

    labeldot3_ -> setText( "  . " );
    labeldot3_ -> setGeometry(QRect( 87 ,  1 ,  6 ,  18 ));
    labeldot3_ -> setAlignment(Qt::AlignCenter);

    QWidget::setTabOrder(ip_part1_, ip_part2_);
    QWidget::setTabOrder(ip_part2_, ip_part3_);
    QWidget::setTabOrder(ip_part3_, ip_part4_);
    ip_part1_ -> set_nexttab_edit(ip_part2_);
    ip_part2_ -> set_nexttab_edit(ip_part3_);
    ip_part3_ -> set_nexttab_edit(ip_part4_);


    connect(ip_part1_, SIGNAL(textChanged( const  QString & )),  this , SLOT(textchangedslot( const  QString & )));
    connect(ip_part2_, SIGNAL(textChanged( const  QString & )),  this , SLOT(textchangedslot( const  QString & )));
    connect(ip_part3_, SIGNAL(textChanged( const  QString & )),  this , SLOT(textchangedslot( const  QString & )));
    connect(ip_part4_, SIGNAL(textChanged( const  QString & )),  this , SLOT(textchangedslot( const  QString & )));

    connect(ip_part1_, SIGNAL(textEdited ( const  QString & )),  this , SLOT(texteditedslot( const  QString & )));
    connect(ip_part2_, SIGNAL(textEdited ( const  QString & )),  this , SLOT(texteditedslot( const  QString & )));
    connect(ip_part3_, SIGNAL(textEdited ( const  QString & )),  this , SLOT(texteditedslot( const  QString & )));
    connect(ip_part4_, SIGNAL(textEdited ( const  QString & )),  this , SLOT(texteditedslot( const  QString & )));
    
}

MyIpAddrEdit:: ~ MyIpAddrEdit()
{

}

void  MyIpAddrEdit::textchangedslot( const  QString &   /* text */ )
{
    QString ippart1, ippart2, ippart3, ippart4;
    ippart1  =  ip_part1_ -> text();
    ippart2  =  ip_part2_ -> text();
    ippart3  =  ip_part3_ -> text();
    ippart4  =  ip_part4_ -> text();

    QString ipaddr  =  QString( " %1.%2.%3.%4 " )
                     .arg(ippart1)
                     .arg(ippart2)
                     .arg(ippart3)
                     .arg(ippart4);

    emit textchanged(ipaddr);
}

void  MyIpAddrEdit::texteditedslot( const  QString  & /* text */ )
{
    QString ippart1, ippart2, ippart3, ippart4;
    ippart1  =  ip_part1_ -> text();
    ippart2  =  ip_part2_ -> text();
    ippart3  =  ip_part3_ -> text();
    ippart4  =  ip_part4_ -> text();

    QString ipaddr  =  QString( " %1.%2.%3.%4 " )
        .arg(ippart1)
        .arg(ippart2)
        .arg(ippart3)
        .arg(ippart4);

    emit textedited(ipaddr);
}

void  MyIpAddrEdit::settext( const  QString  & text)
{
    QString ippart1, ippart2, ippart3, ippart4;
    QString qstring_validate  =  text;

     //  IP地址验证
    QRegExp regexp( " ((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-5]|[01]?\\d\\d?) " );
    QRegExpValidator regexp_validator(regexp,  this );
     int  nPos  =   0 ;
    QValidator::State state  =  regexp_validator.validate(qstring_validate, nPos);
     //  IP合法
     if  (state  ==  QValidator::Acceptable)
    {
        QStringList ippartlist  =  text.split( " . " );
    
         int  strcount  =  ippartlist.size();
         int  index  =   0 ;
         if  (index  <  strcount)
        {
            ippart1  =  ippartlist.at(index);
        }
         if  ( ++ index  <  strcount)
        {
            ippart2  =  ippartlist.at(index);
        }
         if  ( ++ index  <  strcount)
        {
            ippart3  =  ippartlist.at(index);
        }
         if  ( ++ index  <  strcount)
        {
            ippart4  =  ippartlist.at(index);
        }
    }

    ip_part1_ -> setText(ippart1);
    ip_part2_ -> setText(ippart2);
    ip_part3_ -> setText(ippart3);
    ip_part4_ -> setText(ippart4);
}

QString MyIpAddrEdit::text()
{
    QString ippart1, ippart2, ippart3, ippart4;
    ippart1  =  ip_part1_ -> text();
    ippart2  =  ip_part2_ -> text();
    ippart3  =  ip_part3_ -> text();
    ippart4  =  ip_part4_ -> text();

     return  QString( " %1.%2.%3.%4 " )
        .arg(ippart1)
        .arg(ippart2)
        .arg(ippart3)
        .arg(ippart4);
}

void  MyIpAddrEdit::setStyleSheet( const  QString  & styleSheet)
{
    ip_part1_ -> setStyleSheet(styleSheet);
    ip_part2_ -> setStyleSheet(styleSheet);
    ip_part3_ -> setStyleSheet(styleSheet);
    ip_part4_ -> setStyleSheet(styleSheet);
}

下面是调用方法

#include  < QApplication >
#include  < QDialog >
#include  " MyIpAddrEdit.h "

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

    QDialog  * my_dialog  =   new  QDialog;
    MyIpAddrEdit  * ipAddr  =   new  MyIpAddrEdit(my_dialog);
    ipAddr -> settext( " 127.0.0.1 " );
    my_dialog -> show();

     return  app.exec();
}