QT学习笔记之三 GoToCell

先用Qt Designer设计,窗体的基本框架,然后进行编译 ,以下是相关代码:
gotocell.h

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#ifndef GOTOCELL_H
#define GOTOCELL_H
#include <QtGui/QDialog>
#include "ui_gotocell.h"
namespace Ui
{
class goToCellClass;
}
class goToCell : public QDialog,public Ui::goToCellClass // public Ui::goToCellClass这句话要再Qt Designer设计完后加上不然会编译错误
{
Q_OBJECT
public:
goToCell(QWidget *parent = 0);
~goToCell();
private slots:
void on_lineEdit_textChanged();
private:
Ui::goToCellClass *ui;
};
#endif // GOTOCELL_H

gotocell.cpp

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#include<QtGui>
#include "gotocell.h"
#include "ui_gotocell.h"
goToCell::goToCell(QWidget *parent)
: QDialog(parent), ui(new Ui::goToCellClass)
{
ui->setupUi(this);
QRegExp regExp("[A-Za-z][1-9][0-9]{0,2}"); //[A-Za-z][1-9][0-9]{0,2}的意思是:允许输入大小写字母,
//后面跟着一个范围为1-9的数字,后面再跟着0个,1个或者2个的0-9的数字
lineEdit->setValidator(new QRegExpValidator(regExp,this)); // 添加一个验证器用来验证lineEdit里面的字符串
connect(okButton,SIGNAL(accepted()),this,SLOT(accept()));
connect(cancelButton,SIGNAL(rejected()),this,SLOT(reject()));
}
goToCell::~goToCell()
{
delete ui;
}
void goToCell::on_lineEdit_textChanged()
{
okButton->setEnabled(lineEdit->hasAcceptableInput());
}

main.cpp

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#include <QtGui/QApplication>
#include "gotocell.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
goToCell *dialog=new goToCell;
dialog->show();
return app.exec();
}
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