C++ GUI Qt4编程(05)-2.2GoToCell

1. 使用Qt设计师创建GoToCell对话框。

2. gotocelldialog.cpp

 #include <QRegExp>

 #include "gotocelldialog.h"

 GoToCellDialog::GoToCellDialog(QWidget *parent)
     : QDialog(parent)
 {
     setupUi(this);        /*初始化窗体*/
     /*setupUi()函数会自动将符合on_objectName_signalName()命名惯例的任意槽
        与相应的objectName的signalName()信号连接到一起。*/

     /*{0,2}中2前面不能有空格，有空格的话，lineEdit框中无法输入*/
     QRegExp regExp("[A-Za-z][1-9][0-9]{0,2}");
     /*QRegExpValidator检验器类*/
     /*把this传递给QRegExpValidator的构造函数，使它成为GoToCellDialog对象的一个子对象*/
     lineEdit->setValidator(new QRegExpValidator(regExp, this));

     connect(okButton, SIGNAL(clicked()), this, SLOT(accept()));
     connect(cancelButton, SIGNAL(clicked()), this, SLOT(reject()));
 }

 /*启用或禁用OK按钮*/
 void GoToCellDialog::on_lineEdit_textChanged()
 {
     /*QLineEdit::hasAcceptableInput()会使用在构造函数中设置的检验器来判断行编辑器中内容的有效性*/
     okButton->setEnabled(lineEdit->hasAcceptableInput());
 }

3. gotocelldialog.h

 /**/
 #ifndef GOTOCELLDIALOG_H
 #define GOTOCELLDIALOG_H

 #include <QDialog>

 #include "ui_gotocelldialog.h"

 class GoToCellDialog : public QDialog, public Ui::GoToCellDialog
 {
     Q_OBJECT

 public:
     GoToCellDialog(QWidget *parent = );

 private slots:
     void on_lineEdit_textChanged();
 };

 #endif

4. main.cpp

 #include <QApplication>

 #include "gotocelldialog.h"

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

     GoToCellDialog *dialog = new GoToCellDialog;
     dialog->show();

     return app.exec();
 }

 #if 0

 #include <QApplication>
 #include <QDialog>

 #include "ui_gotocelldialog.h"

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

     Ui::GoToCellDialog ui;
     QDialog *dialog = new QDialog;
     ui.setupUi(dialog);
     dialog->show();

     return app.exec();
 }

 #endif