doc/examples/addressbook-sdk/part6/addressbook.cpp

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  38
  39 #include <QFileDialog>
  40
  41 #include "addressbook.h"
  42 #include "ui_addressbook.h"
  43
  44 AddressBook::AddressBook(QWidget *parent)
  45     : QWidget(parent), ui(new Ui::AddressBook)
  46 {
  47     ui->setupUi(this);
  48
  49     ui->nameLine->setReadOnly(true);
  50     ui->addressText->setReadOnly(true);
  51     ui->submitButton->hide();
  52     ui->cancelButton->hide();
  53     ui->nextButton->setEnabled(false);
  54     ui->previousButton->setEnabled(false);
  55     ui->editButton->setEnabled(false);
  56     ui->removeButton->setEnabled(false);
  57
  58     connect(ui->addButton, SIGNAL(clicked()), this,
  59                 SLOT(addContact()));
  60     connect(ui->submitButton, SIGNAL(clicked()), this,
  61                 SLOT(submitContact()));
  62     connect(ui->cancelButton, SIGNAL(clicked()), this,
  63                 SLOT(cancel()));
  64     connect(ui->nextButton, SIGNAL(clicked()), this,
  65                 SLOT(next()));
  66     connect(ui->previousButton, SIGNAL(clicked()), this,
  67                 SLOT(previous()));
  68     connect(ui->editButton, SIGNAL(clicked()), this,
  69                 SLOT(editContact()));
  70     connect(ui->removeButton, SIGNAL(clicked()), this,
  71                 SLOT(removeContact()));
  72     connect(ui->findButton, SIGNAL(clicked()), this,
  73                 SLOT(findContact()));
  74     //! [connectSlots]
  75     connect(ui->loadButton, SIGNAL(clicked()), this,
  76                 SLOT(loadFromFile()));
  77     connect(ui->saveButton, SIGNAL(clicked()), this,
  78                 SLOT(saveToFile()));
  79     //! [connectSlots]
  80
  81     setWindowTitle(tr("Simple Address Book"));
  82 }
  83
  84 AddressBook::~AddressBook()
  85 {
  86     delete ui;
  87 }
  88
  89 void AddressBook::addContact()
  90 {
  91     oldName = ui->nameLine->text();
  92     oldAddress = ui->addressText->toPlainText();
  93
  94     ui->nameLine->clear();
  95     ui->addressText->clear();
  96
  97     updateInterface(AddingMode);
  98 }
  99
 100 void AddressBook::submitContact()
 101 {
 102     QString name = ui->nameLine->text();
 103     QString address = ui->addressText->toPlainText();
 104
 105     if (name.isEmpty() || address.isEmpty()) {
 106         QMessageBox::information(this, tr("Empty Field"),
 107             tr("Please enter a name and address."));
 108         updateInterface(NavigationMode);
 109         return;
 110     }
 111
 112     if (currentMode == AddingMode) {
 113
 114         if (!contacts.contains(name)) {
 115             contacts.insert(name, address);
 116             QMessageBox::information(this, tr("Add Successful"),
 117                 tr("\"%1\" has been added to your address book.").arg(name));
 118         } else {
 119             QMessageBox::information(this, tr("Add Unsuccessful"),
 120                 tr("Sorry, \"%1\" is already in your address book.").arg(name));
 121         }
 122
 123     } else if (currentMode == EditingMode) {
 124
 125         if (oldName != name) {
 126             if (!contacts.contains(name)) {
 127                 QMessageBox::information(this, tr("Edit Successful"),
 128                     tr("\"%1\" has been edited in your address book.").arg(oldName));
 129                 contacts.remove(oldName);
 130                 contacts.insert(name, address);
 131             } else  {
 132                 QMessageBox::information(this, tr("Edit Unsuccessful"),
 133                     tr("Sorry, \"%1\" is already in your address book.").arg(name));
 134             }
 135         } else if (oldAddress != address) {
 136             QMessageBox::information(this, tr("Edit Successful"),
 137                 tr("\"%1\" has been edited in your address book.").arg(name));
 138             contacts[name] = address;
 139         }
 140     }
 141     updateInterface(NavigationMode);
 142 }
 143
 144 void AddressBook::cancel()
 145 {
 146     ui->nameLine->setText(oldName);
 147     ui->nameLine->setReadOnly(true);
 148
 149     updateInterface(NavigationMode);
 150 }
 151
 152 void AddressBook::next()
 153 {
 154     QString name = ui->nameLine->text();
 155     QMap<QString, QString>::iterator i = contacts.find(name);
 156
 157     if (i != contacts.end())
 158         i++;
 159     if (i == contacts.end())
 160         i = contacts.begin();
 161
 162     ui->nameLine->setText(i.key());
 163     ui->addressText->setText(i.value());
 164 }
 165
 166 void AddressBook::previous()
 167 {
 168     QString name = ui->nameLine->text();
 169     QMap<QString, QString>::iterator i = contacts.find(name);
 170
 171     if (i == contacts.end()) {
 172         ui->nameLine->clear();
 173         ui->addressText->clear();
 174         return;
 175     }
 176
 177     if (i == contacts.begin())
 178         i = contacts.end();
 179
 180     i--;
 181     ui->nameLine->setText(i.key());
 182     ui->addressText->setText(i.value());
 183 }
 184
 185 void AddressBook::editContact()
 186 {
 187     oldName = ui->nameLine->text();
 188     oldAddress = ui->addressText->toPlainText();
 189
 190     updateInterface(EditingMode);
 191 }
 192
 193 void AddressBook::removeContact()
 194 {
 195     QString name = ui->nameLine->text();
 196     QString address = ui->addressText->toPlainText();
 197
 198     if (contacts.contains(name)) {
 199         int button = QMessageBox::question(this,
 200             tr("Confirm Remove"),
 201             tr("Are you sure you want to remove \"%1\"?").arg(name),
 202             QMessageBox::Yes | QMessageBox::No);
 203
 204         if (button == QMessageBox::Yes) {
 205             previous();
 206             contacts.remove(name);
 207
 208             QMessageBox::information(this, tr("Remove Successful"),
 209                 tr("\"%1\" has been removed from your address book.").arg(name));
 210         }
 211     }
 212
 213     updateInterface(NavigationMode);
 214 }
 215
 216 void AddressBook::updateInterface(Mode mode)
 217 {
 218     currentMode = mode;
 219
 220     switch (currentMode) {
 221
 222     case AddingMode:
 223     case EditingMode:
 224
 225         ui->nameLine->setReadOnly(false);
 226         ui->nameLine->setFocus(Qt::OtherFocusReason);
 227         ui->addressText->setReadOnly(false);
 228
 229         ui->addButton->setEnabled(false);
 230         ui->editButton->setEnabled(false);
 231         ui->removeButton->setEnabled(false);
 232
 233         ui->nextButton->setEnabled(false);
 234         ui->previousButton->setEnabled(false);
 235
 236         ui->submitButton->show();
 237         ui->cancelButton->show();
 238         break;
 239
 240     case NavigationMode:
 241
 242         if (contacts.isEmpty()) {
 243             ui->nameLine->clear();
 244             ui->addressText->clear();
 245         }
 246
 247         ui->nameLine->setReadOnly(true);
 248         ui->addressText->setReadOnly(true);
 249         ui->addButton->setEnabled(true);
 250
 251         int number = contacts.size();
 252         ui->editButton->setEnabled(number >= 1);
 253         ui->removeButton->setEnabled(number >= 1);
 254         ui->findButton->setEnabled(number > 2);
 255         ui->nextButton->setEnabled(number > 1);
 256         ui->previousButton->setEnabled(number >1);
 257
 258         ui->submitButton->hide();
 259         ui->cancelButton->hide();
 260         break;
 261     }
 262 }
 263
 264 void AddressBook::findContact()
 265 {
 266     FindDialog dialog;
 267
 268     if (dialog.exec() == QDialog::Accepted) {
 269         QString contactName = dialog.findText();
 270
 271         if (contacts.contains(contactName)) {
 272             ui->nameLine->setText(contactName);
 273             ui->addressText->setText(contacts.value(contactName));
 274         } else {
 275             QMessageBox::information(this, tr("Contact Not Found"),
 276                 tr("Sorry, \"%1\" is not in your address book.").arg(contactName));
 277             return;
 278         }
 279     }
 280
 281     updateInterface(NavigationMode);
 282 }
 283
 284 //! [saveToFile part1]
 285 void AddressBook::saveToFile()
 286 {
 287     QString fileName = QFileDialog::getSaveFileName(this,
 288         tr("Save Address Book"), "",
 289         tr("Address book (*.abk);; AllFiles (*)"));
 290 //! [saveToFile part1]
 291
 292 //! [saveToFile part2]
 293     if (fileName.isEmpty())
 294         return;
 295     else {
 296         QFile file(fileName);
 297
 298         if (!file.open(QIODevice::WriteOnly)) {
 299             QMessageBox::information(this, tr("Unable to open file"),
 300                 file.errorString());
 301             return;
 302         }
 303 //! [saveToFile part2]
 304
 305 //! [saveToFile part3]
 306         QDataStream out(&file);
 307         out.setVersion(QDataStream::Qt_4_5);
 308         out << contacts;
 309     }
 310 }
 311 //! [saveToFile part3]
 312
 313 //! [loadFromFile part1]
 314 void AddressBook::loadFromFile()
 315 {
 316     QString fileName = QFileDialog::getOpenFileName(this,
 317         tr("Open Address Book"), "",
 318         tr("Address Book(*.abk);; All Files(*)"));
 319 //! [loadFromFile part1]
 320
 321 //! [loadFromFile part2]
 322     if (fileName.isEmpty())
 323         return;
 324     else {
 325         QFile file(fileName);
 326
 327         if (!file.open(QIODevice::ReadOnly)) {
 328             QMessageBox::information(this, tr("Unable to open file"),
 329                 file.errorString());
 330             return;
 331         }
 332
 333         QDataStream in(&file);
 334         in.setVersion(QDataStream::Qt_4_5);
 335         contacts.clear();   // remove all items
 336         in >> contacts;
 337 //! [loadFromFile part2]
 338
 339 //! [loadFromFile part3]
 340         if (contacts.isEmpty()) {
 341             QMessageBox::information(this, tr("No contacts in file"),
 342                 tr("The file you are attempting to open contains no contacts."));
 343         } else {
 344             QMap<QString, QString>::iterator i = contacts.begin();
 345             ui->nameLine->setText(i.key());
 346             ui->addressText->setText(i.value());
 347         }
 348     }
 349
 350     updateInterface(NavigationMode);
 351 }
 352 //! [loadFromFile part3]