\example examples/addressbook-sdk/part5
\title Address Book 5 - Adding a Find Function}
+ In this chapter, we look at ways to locate contacts and addresses in the
+ address book application.
+
+ # image
+
+ As we keep adding contacts to our address book, it becomes tedious to
+ navigate them with the \gui Next and \gui Previous buttons. In this case,
+ a \gui Find function would be more efficient in looking up contacts. The
+ screenshot above shows the \gui Find button and its position on the panel
+ of buttons.
+
+ When the user clicks on the \gui Find button, it is useful to display a
+ dialog that can prompt the user for a contact's name. Qt provides QDialog,
+ which we subclass in this chapter, to implement a FindDialog class.
+
+ \section1 Designing FindDialog
+
+ #image
+
+ We begin by adding a new \c{.ui} file to our project. Right click on your
+ project and select \gui{Add New...}. In the \gui{New File} dialog, select
+ \gui{Qt Designer Form}. In the \gui{Qt Designer Form| dialog, select
+ \e{Dialog without buttons}. Name it \c{finddialog.ui} and add it to your
+ project. The \QD plugin within Qt Creator will now display your new form.
+
+ To replicate the screenshot above, we need a label, a line edit, and a push
+ button. Drag these onto your form. Set their text accordingly and name them
+ \c label, \c lineEdit, and \c findButton, respectively. Place these widgets
+ in a horizontal layout. Then set a top level layout - either horizontal or
+ vertical.
+
*/
/*!
--- /dev/null
+#include "addressbook.h"
+#include "ui_addressbook.h"
+
+AddressBook::AddressBook(QWidget *parent)
+ : QWidget(parent), ui(new Ui::AddressBook)
+{
+ ui->setupUi(this);
+
+ nameLine = new QLineEdit;
+ nameLine = ui->nameLine;
+ nameLine->setReadOnly(true);
+
+ addressText = new QTextEdit;
+ addressText = ui->addressText;
+ addressText->setReadOnly(true);
+
+ addButton = new QPushButton;
+ addButton = ui->addButton;
+
+ submitButton = new QPushButton;
+ submitButton = ui->submitButton;
+ submitButton->hide();
+
+ cancelButton = new QPushButton;
+ cancelButton = ui->cancelButton;
+ cancelButton->hide();
+
+ nextButton = new QPushButton;
+ nextButton = ui->nextButton;
+ nextButton->setEnabled(false);
+
+ previousButton = new QPushButton;
+ previousButton = ui->previousButton;
+ previousButton->setEnabled(false);
+
+ editButton = new QPushButton;
+ editButton = ui->editButton;
+ editButton->setEnabled(false);
+
+ removeButton = new QPushButton;
+ removeButton = ui->removeButton;
+ removeButton->setEnabled(false);
+
+ connect(addButton, SIGNAL(clicked()), this,
+ SLOT(addContact()));
+ connect(submitButton, SIGNAL(clicked()), this,
+ SLOT(submitContact()));
+ connect(cancelButton, SIGNAL(clicked()), this,
+ SLOT(cancel()));
+ connect(nextButton, SIGNAL(clicked()), this,
+ SLOT(next()));
+ connect(previousButton, SIGNAL(clicked()), this,
+ SLOT(previous()));
+ connect(editButton, SIGNAL(clicked()), this,
+ SLOT(editContact()));
+ connect(removeButton, SIGNAL(clicked()), this,
+ SLOT(removeContact()));
+
+ setWindowTitle(tr("Simple Address Book"));
+}
+
+AddressBook::~AddressBook()
+{
+ delete ui;
+}
+
+void AddressBook::addContact()
+{
+ oldName = nameLine->text();
+ oldAddress = addressText->toPlainText();
+
+ nameLine->clear();
+ addressText->clear();
+
+ updateInterface(AddingMode);
+}
+
+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."));
+ }
+
+ if (currentMode == AddingMode) {
+
+ 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));
+ }
+
+ } else if (currentMode == EditingMode) {
+
+ if (oldName != name) {
+ if (!contacts.contains(name)) {
+ QMessageBox::information(this, tr("Edit Successful"),
+ tr("\"%1\" has been edited in your address book.").arg(oldName));
+ contacts.remove(oldName);
+ contacts.insert(name, address);
+ } else {
+ QMessageBox::information(this, tr("Edit Unsuccessful"),
+ tr("Sorry, \"%1\" is already in your address book.").arg(name));
+ }
+ } else if (oldAddress != address) {
+ QMessageBox::information(this, tr("Edit Successful"),
+ tr("\"%1\" has been edited in your address book.").arg(name));
+ contacts[name] = address;
+ }
+ }
+ updateInterface(NavigationMode);
+}
+
+void AddressBook::cancel()
+{
+ nameLine->setText(oldName);
+ nameLine->setReadOnly(true);
+
+ updateInterface(NavigationMode);
+}
+
+void AddressBook::next()
+{
+ QString name = nameLine->text();
+ QMap<QString, QString>::iterator i = contacts.find(name);
+
+ if (i != contacts.end())
+ i++;
+ if (i == contacts.end())
+ i = contacts.begin();
+
+ nameLine->setText(i.key());
+ addressText->setText(i.value());
+}
+
+void AddressBook::previous()
+{
+ QString name = nameLine->text();
+ QMap<QString, QString>::iterator i = contacts.find(name);
+
+ if (i == contacts.end()) {
+ nameLine->clear();
+ addressText->clear();
+ return;
+ }
+
+ if (i == contacts.begin())
+ i = contacts.end();
+
+ i--;
+ nameLine->setText(i.key());
+ addressText->setText(i.value());
+}
+
+void AddressBook::editContact()
+{
+ oldName = nameLine->text();
+ oldAddress = addressText->toPlainText();
+
+ updateInterface(EditingMode);
+}
+
+void AddressBook::removeContact()
+{
+ QString name = nameLine->text();
+ QString address = addressText->toPlainText();
+
+ if (contacts.contains(name)) {
+ int button = QMessageBox::question(this,
+ tr("Confirm Remove"),
+ tr("Are you sure you want to remove \"%1\"?").arg(name),
+ QMessageBox::Yes | QMessageBox::No);
+
+ if (button == QMessageBox::Yes) {
+ previous();
+ contacts.remove(name);
+
+ QMessageBox::information(this, tr("Remove Successful"),
+ tr("\"%1\" has been removed from your address book.").arg(name));
+ }
+ }
+
+ updateInterface(NavigationMode);
+}
+
+void AddressBook::updateInterface(Mode mode)
+{
+ currentMode = mode;
+
+ switch (currentMode) {
+
+ case AddingMode:
+ case EditingMode:
+
+ nameLine->setReadOnly(false);
+ nameLine->setFocus(Qt::OtherFocusReason);
+ addressText->setReadOnly(false);
+
+ addButton->setEnabled(false);
+ editButton->setEnabled(false);
+ removeButton->setEnabled(false);
+
+ nextButton->setEnabled(false);
+ previousButton->setEnabled(false);
+
+ submitButton->show();
+ cancelButton->show();
+ break;
+
+ case NavigationMode:
+
+ if (contacts.isEmpty()) {
+ nameLine->clear();
+ addressText->clear();
+ }
+
+ nameLine->setReadOnly(true);
+ addressText->setReadOnly(true);
+ addButton->setEnabled(true);
+
+ int number = contacts.size();
+ editButton->setEnabled(number >= 1);
+ removeButton->setEnabled(number >= 1);
+ nextButton->setEnabled(number > 1);
+ previousButton->setEnabled(number >1);
+
+ submitButton->hide();
+ cancelButton->hide();
+ break;
+ }
+}
--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>AddressBook</class>
+ <widget class="QWidget" name="AddressBook">
+ <property name="geometry">
+ <rect>
+ <x>0</x>
+ <y>0</y>
+ <width>600</width>
+ <height>400</height>
+ </rect>
+ </property>
+ <property name="windowTitle">
+ <string>AddressBook</string>
+ </property>
+ <widget class="QWidget" name="layoutWidget">
+ <property name="geometry">
+ <rect>
+ <x>20</x>
+ <y>30</y>
+ <width>413</width>
+ <height>275</height>
+ </rect>
+ </property>
+ <layout class="QGridLayout" name="gridLayout">
+ <item row="0" column="0">
+ <widget class="QLabel" name="nameLabel">
+ <property name="text">
+ <string>Name:</string>
+ </property>
+ </widget>
+ </item>
+ <item row="0" column="1">
+ <widget class="QLineEdit" name="nameLine"/>
+ </item>
+ <item row="1" column="0">
+ <widget class="QLabel" name="addressLabel">
+ <property name="text">
+ <string>Address:</string>
+ </property>
+ <property name="alignment">
+ <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
+ </property>
+ </widget>
+ </item>
+ <item row="1" column="1">
+ <widget class="QTextEdit" name="addressText"/>
+ </item>
+ <item row="1" column="2">
+ <layout class="QVBoxLayout" name="verticalLayout">
+ <item>
+ <widget class="QPushButton" name="addButton">
+ <property name="text">
+ <string>Add</string>
+ </property>
+ </widget>
+ </item>
+ <item>
+ <widget class="QPushButton" name="submitButton">
+ <property name="text">
+ <string>Submit</string>
+ </property>
+ </widget>
+ </item>
+ <item>
+ <widget class="QPushButton" name="cancelButton">
+ <property name="text">
+ <string>Cancel</string>
+ </property>
+ </widget>
+ </item>
+ <item>
+ <widget class="QPushButton" name="editButton">
+ <property name="text">
+ <string>Edit</string>
+ </property>
+ </widget>
+ </item>
+ <item>
+ <widget class="QPushButton" name="removeButton">
+ <property name="text">
+ <string>Remove</string>
+ </property>
+ </widget>
+ </item>
+ <item>
+ <spacer name="verticalSpacer">
+ <property name="orientation">
+ <enum>Qt::Vertical</enum>
+ </property>
+ <property name="sizeHint" stdset="0">
+ <size>
+ <width>20</width>
+ <height>40</height>
+ </size>
+ </property>
+ </spacer>
+ </item>
+ </layout>
+ </item>
+ <item row="2" column="1">
+ <layout class="QHBoxLayout" name="horizontalLayout">
+ <item>
+ <widget class="QPushButton" name="nextButton">
+ <property name="text">
+ <string>Previous</string>
+ </property>
+ </widget>
+ </item>
+ <item>
+ <widget class="QPushButton" name="previousButton">
+ <property name="text">
+ <string>Next</string>
+ </property>
+ </widget>
+ </item>
+ </layout>
+ </item>
+ </layout>
+ </widget>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>
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