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);
}

 

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

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

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

    return app.exec();
}