Ch5 code

05-qt-meta-object-compiler/5-meta-object-compiler/CMakeLists.txt

@@ -0,0 +1,26 @@
+cmake_minimum_required(VERSION 3.14)
+
+project(5-meta-object-compiler LANGUAGES CXX)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Core)
+find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Core)
+
+add_executable(3-signals-and-slots-in-qt
+  main.cpp
+  UserInteractor.h UserInteractor.cpp
+  Firefox.h Firefox.cpp
+  InternetExplorer.h InternetExplorer.cpp
+)
+target_link_libraries(3-signals-and-slots-in-qt Qt${QT_VERSION_MAJOR}::Core)
+
+install(TARGETS 3-signals-and-slots-in-qt
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})

05-qt-meta-object-compiler/5-meta-object-compiler/Firefox.cpp

@@ -0,0 +1,16 @@
+#include "Firefox.h"
+#include <QDebug>
+
+Firefox::Firefox(QObject *parent)
+    : QObject{parent}
+{
+
+}
+
+void Firefox::browse(const QString &phrase)
+{
+    qDebug() << "\nDisplaying results for " << phrase
+             << "\nResult 1"
+             << "\nResult 2"
+             << "\nResult 3";
+}

05-qt-meta-object-compiler/5-meta-object-compiler/Firefox.h

@@ -0,0 +1,17 @@
+#ifndef FIREFOX_H
+#define FIREFOX_H
+
+#include <QObject>
+
+class Firefox : public QObject
+{
+    Q_OBJECT
+public:
+    explicit Firefox(QObject *parent = nullptr);
+
+public slots:
+    void browse(const QString &phrase);
+
+};
+
+#endif // FIREFOX_H

05-qt-meta-object-compiler/5-meta-object-compiler/InternetExplorer.cpp

@@ -0,0 +1,17 @@
+#include "InternetExplorer.h"
+#include <QDebug>
+
+InternetExplorer::InternetExplorer(QObject *parent)
+    : QObject{parent}
+{
+    m_timer.setInterval(10000);
+    m_timer.setSingleShot(true);
+
+    connect(this, &InternetExplorer::browseRequested, &m_timer, qOverload<>(&QTimer::start));
+    connect(&m_timer, &QTimer::timeout, this, &InternetExplorer::browse);
+}
+
+void InternetExplorer::browse()
+{
+    qDebug() << "Internet explorer is not responding...";
+}

05-qt-meta-object-compiler/5-meta-object-compiler/InternetExplorer.h

@@ -0,0 +1,23 @@
+#ifndef INTERNETEXPLORER_H
+#define INTERNETEXPLORER_H
+
+#include <QObject>
+#include <QTimer>
+
+class InternetExplorer : public QObject
+{
+    Q_OBJECT
+public:
+    explicit InternetExplorer(QObject *parent = nullptr);
+
+public slots:
+    void browse();
+
+signals:
+    void browseRequested(const QString &phrase);
+
+private:
+    QTimer m_timer;
+};
+
+#endif // INTERNETEXPLORER_H

05-qt-meta-object-compiler/5-meta-object-compiler/UserInteractor.cpp

@@ -0,0 +1,33 @@
+#include "UserInteractor.h"
+#include <QTextStream>
+#include <QDebug>
+
+UserInteractor::UserInteractor(QObject *parent)
+    : QObject{parent}
+{
+}
+
+void UserInteractor::getInput()
+{
+    qDebug() << "\nType in your search phrase:\n";
+
+    QTextStream s(stdin);
+    const auto &phrase = s.readLine();
+
+    if (!phrase.isEmpty()) {
+        setPhrase(phrase);
+    }
+}
+
+QString UserInteractor::phrase() const
+{
+    return m_phrase;
+}
+
+void UserInteractor::setPhrase(const QString &newPhrase)
+{
+    if (m_phrase == newPhrase)
+        return;
+    m_phrase = newPhrase;
+    emit phraseTyped(m_phrase);
+}

05-qt-meta-object-compiler/5-meta-object-compiler/UserInteractor.h

@@ -0,0 +1,25 @@
+#ifndef USERINTERACTOR_H
+#define USERINTERACTOR_H
+
+#include <QObject>
+
+class UserInteractor : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QString phrase READ phrase WRITE setPhrase NOTIFY phraseTyped)
+public:
+    explicit UserInteractor(QObject *parent = nullptr);
+
+    void getInput();
+
+    QString phrase() const;
+    void setPhrase(const QString &newPhrase);
+
+signals:
+    void phraseTyped(const QString &phrase);
+
+private:
+    QString m_phrase;
+};
+
+#endif // USERINTERACTOR_H

05-qt-meta-object-compiler/5-meta-object-compiler/main.cpp

@@ -0,0 +1,27 @@
+#include <QCoreApplication>
+#include "UserInteractor.h"
+
+#include "Firefox.h"
+#include "InternetExplorer.h"
+#include "qvariant.h"
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication a(argc, argv);
+
+    UserInteractor interactor;
+    Firefox firefox;
+    InternetExplorer internetExplorer;
+
+    firefox.setProperty("version", "2.12.12");
+
+    QObject::connect(&interactor, &UserInteractor::phraseTyped, &a, [&]() {
+        QObject *obj = &interactor;
+        qDebug() << obj->property("phrase");
+        qDebug() << firefox.property("version");
+    });
+
+    interactor.getInput();
+
+    return a.exec();
+}

05-qt-meta-object-compiler/initial/CMakeLists.txt

@@ -0,0 +1,26 @@
+cmake_minimum_required(VERSION 3.14)
+
+project(3-signals-and-slots-in-qt LANGUAGES CXX)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Core)
+find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Core)
+
+add_executable(3-signals-and-slots-in-qt
+  main.cpp
+  UserInteractor.h UserInteractor.cpp
+  Firefox.h Firefox.cpp
+  InternetExplorer.h InternetExplorer.cpp
+)
+target_link_libraries(3-signals-and-slots-in-qt Qt${QT_VERSION_MAJOR}::Core)
+
+install(TARGETS 3-signals-and-slots-in-qt
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})

05-qt-meta-object-compiler/initial/Firefox.cpp

@@ -0,0 +1,16 @@
+#include "Firefox.h"
+#include <QDebug>
+
+Firefox::Firefox(QObject *parent)
+    : QObject{parent}
+{
+
+}
+
+void Firefox::browse(const QString &phrase)
+{
+    qDebug() << "\nDisplaying results for " << phrase
+             << "\nResult 1"
+             << "\nResult 2"
+             << "\nResult 3";
+}

05-qt-meta-object-compiler/initial/Firefox.h

@@ -0,0 +1,17 @@
+#ifndef FIREFOX_H
+#define FIREFOX_H
+
+#include <QObject>
+
+class Firefox : public QObject
+{
+    Q_OBJECT
+public:
+    explicit Firefox(QObject *parent = nullptr);
+
+public slots:
+    void browse(const QString &phrase);
+
+};
+
+#endif // FIREFOX_H

05-qt-meta-object-compiler/initial/InternetExplorer.cpp

@@ -0,0 +1,17 @@
+#include "InternetExplorer.h"
+#include <QDebug>
+
+InternetExplorer::InternetExplorer(QObject *parent)
+    : QObject{parent}
+{
+    m_timer.setInterval(10000);
+    m_timer.setSingleShot(true);
+
+    connect(this, &InternetExplorer::browseRequested, &m_timer, qOverload<>(&QTimer::start));
+    connect(&m_timer, &QTimer::timeout, this, &InternetExplorer::browse);
+}
+
+void InternetExplorer::browse()
+{
+    qDebug() << "Internet explorer is not responding...";
+}

05-qt-meta-object-compiler/initial/InternetExplorer.h

@@ -0,0 +1,23 @@
+#ifndef INTERNETEXPLORER_H
+#define INTERNETEXPLORER_H
+
+#include <QObject>
+#include <QTimer>
+
+class InternetExplorer : public QObject
+{
+    Q_OBJECT
+public:
+    explicit InternetExplorer(QObject *parent = nullptr);
+
+public slots:
+    void browse();
+
+signals:
+    void browseRequested(const QString &phrase);
+
+private:
+    QTimer m_timer;
+};
+
+#endif // INTERNETEXPLORER_H

05-qt-meta-object-compiler/initial/UserInteractor.cpp

@@ -0,0 +1,20 @@
+#include "UserInteractor.h"
+#include <QTextStream>
+#include <QDebug>
+
+UserInteractor::UserInteractor(QObject *parent)
+    : QObject{parent}
+{
+}
+
+void UserInteractor::getInput()
+{
+    qDebug() << "\nType in your search phrase:\n";
+
+    QTextStream s(stdin);
+    const auto &phrase = s.readLine();
+
+    if (!phrase.isEmpty()) {
+        emit phraseTyped(phrase);
+    }
+}

05-qt-meta-object-compiler/initial/UserInteractor.h

@@ -0,0 +1,19 @@
+#ifndef USERINTERACTOR_H
+#define USERINTERACTOR_H
+
+#include <QObject>
+
+class UserInteractor : public QObject
+{
+    Q_OBJECT
+public:
+    explicit UserInteractor(QObject *parent = nullptr);
+
+    void getInput();
+
+signals:
+    void phraseTyped(const QString &phrase);
+
+};
+
+#endif // USERINTERACTOR_H

05-qt-meta-object-compiler/initial/main.cpp

@@ -0,0 +1,21 @@
+#include <QCoreApplication>
+#include "UserInteractor.h"
+
+#include "Firefox.h"
+#include "InternetExplorer.h"
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication a(argc, argv);
+
+    UserInteractor interactor;
+    Firefox firefox;
+    InternetExplorer internetExplorer;
+
+    QObject::connect(&interactor, &UserInteractor::phraseTyped, &firefox, &Firefox::browse);
+    QObject::connect(&interactor, &UserInteractor::phraseTyped, &internetExplorer, &InternetExplorer::browseRequested);
+
+    interactor.getInput();
+
+    return a.exec();
+}