Qt对话框Dialog之查找对话框2

代码如下（示例）：

#ifndef GOTOCELL_H
#define GOTOCELL_H
#include 
#include 

class QPushButton;
class QLabel;
class QLineEdit;
class GoToCell : public QDialog
{
    Q_OBJECT

public:

    explicit GoToCell(QWidget *parent = 0);
private slots:
    void slotTextChanged();
private:

    QPushButton * mPtr_ok;
    QPushButton * mPtr_cancel;
    QLabel * mPtr_label;
    QLineEdit * mPtr_lineEdit;
};

#endif // GOTOCELL_H

代码如下（示例）：

#include "go_to_cell.h"
#include 
#include 
#include 
#include 
#include 
#include 
GoToCell::GoToCell(QWidget *parent):QDialog(parent)
{
    this->setWindowTitle(tr("Go To Cell"));
    mPtr_ok = new QPushButton(tr("OK"));
    mPtr_cancel = new QPushButton(tr("Cancel"));
    mPtr_label = new QLabel(tr("&Cell Location"));
    //正则
    QRegExp regExp("[A-Za-z][1-9][0-9]{0,2}");
    mPtr_lineEdit = new QLineEdit;
    //lineEdit 添加内置检验器
    mPtr_lineEdit->setValidator(new QRegExpValidator(regExp,this));
    mPtr_label->setBuddy(mPtr_lineEdit);
    QHBoxLayout * top = new QHBoxLayout;
    top->addWidget(mPtr_label);
    top->addWidget(mPtr_lineEdit);

    QHBoxLayout * bottom = new QHBoxLayout;
    bottom->addStretch();
    bottom->addWidget(mPtr_ok);
    bottom->addWidget(mPtr_cancel);

    QVBoxLayout * main = new QVBoxLayout;
    main->addLayout(top);
    main->addLayout(bottom);

    this->setLayout(main);

    connect(mPtr_ok,SIGNAL(clicked()),this,SLOT(accept()));
    connect(mPtr_cancel,SIGNAL(clicked()),this,SLOT(reject()));
    connect(mPtr_lineEdit,SIGNAL(textChanged(QString)),this,SLOT(slotTextChanged()));
}

void GoToCell::slotTextChanged()
{
    mPtr_ok->setEnabled(mPtr_lineEdit->hasAcceptableInput());
}