1.12 入门级程序 ：添加地址.txt

qt的源代码

　　public slots:
　　     void addContact();
　　     void submitContact();
　　     void cancel();
　　private:
　　     QPushButton *addButton;
　　     QPushButton *submitButton;
　　     QPushButton *cancelButton;
　　     QLineEdit *nameLine;
　　     QTextEdit *addressText;
　　QMap<QString, QString> contacts;
　　     QString oldName;
　　     QString oldAddress;
　　 };
　　addButton = new QPushButton(tr("&Add"));
　　     addButton->show();
　　     submitButton = new QPushButton(tr("&Submit"));
　　     submitButton->hide();
　　     cancelButton = new QPushButton(tr("&Cancel"));
　　     cancelButton->hide();
　　connect(addButton, SIGNAL(clicked()), this, SLOT(addContact()));
　　     connect(submitButton, SIGNAL(clicked()), this, SLOT(submitContact()));
　　     connect(cancelButton, SIGNAL(clicked()), this, SLOT(cancel()));
 QVBoxLayout *buttonLayout1 = new QVBoxLayout;
     buttonLayout1->addWidget(addButton, Qt::AlignTop);
     buttonLayout1->addWidget(submitButton);
     buttonLayout1->addWidget(cancelButton);
     buttonLayout1->addStretch();
 QGridLayout *mainLayout = new QGridLayout;
     mainLayout->addWidget(nameLabel, 0, 0);
     mainLayout->addWidget(nameLine, 0, 1);
     mainLayout->addWidget(addressLabel, 1, 0, Qt::AlignTop);
     mainLayout->addWidget(addressText, 1, 1);
     mainLayout->addLayout(buttonLayout1, 1, 2);
void AddressBook::addContact()
 {
     oldName = nameLine->text();
     oldAddress = addressText->toPlainText();
     nameLine->clear();
     addressText->clear();
     nameLine->setReadOnly(false);
     nameLine->setFocus(Qt::OtherFocusReason);
     addressText->setReadOnly(false);
     addButton->setEnabled(false);
     submitButton->show();
     cancelButton->show();
 }
void AddressBook::submitContact()
 {
     QString name = nameLine->text();
     QString address = addressText->toPlainText();
     if (name == "" || address == "") {
         QMessageBox::information(this, tr("Empty Field"),
             tr("Please enter a name and address."));
         return;
     }
 if (!contacts.contains(name)) {
         contacts.insert(name, address);
         QMessageBox::information(this, tr("Add Successful"),
             tr("\"%1\" has been added to your address book.").arg(name));
     } else {
         QMessageBox::information(this, tr("Add Unsuccessful"),
             tr("Sorry, \"%1\" is already in your address book.").arg(name));
         return;
     }
 if (contacts.isEmpty()) {
         nameLine->clear();
         addressText->clear();
     }
     nameLine->setReadOnly(true);
     addressText->setReadOnly(true);
     addButton->setEnabled(true);
     submitButton->hide();
     cancelButton->hide();
 }