initial commit

button.cpp

+
+#include "button.h"
+
+//constructors for coloured  buttons with or without text
+Button::Button(const QString& text, QWidget* parent) : QToolButton(parent)
+{
+    this->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+    this->setText(text);
+}
+
+Button::Button(QWidget* parent) : QToolButton(parent)
+{
+    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+}
+
+QSize Button::sizeHint() const
+{
+    QSize size = QToolButton::sizeHint();
+    size.rheight() += 20;
+    size.rwidth() = qMax(size.width(), size.height());
+    return size;
+}
+
+//accessors for member variables
+QColor Button::getColor()
+{
+    return buttonColor;
+}
+

button.h

+#pragma once
+
+#include "QtWidgets/qtoolbutton.h"
+#include "QtWidgets/qwidget.h"
+
+class Button : public QToolButton
+{
+    Q_OBJECT
+
+public:
+    Button(const QString& text, QWidget* parent = nullptr);
+    Button(QWidget* parent = nullptr);
+
+    QSize  sizeHint() const override;
+    QColor getColor();
+
+private:
+    QColor buttonColor;
+};
+

card_a.cpp

+#include "card_a.h"
+
+Card_A::Card_A(controller_ptr Controller)
+{
+    controller = Controller;
+
+    connect_to_pointer(this, SIGNAL(Card_A::setNewMainWindow), controller, SLOT(WindowController::handleNewMainWindow));
+
+    button1 = new Button("button 1");
+    button2 = new Button("button 2");
+
+    this->addWidget(button1);
+    this->addWidget(button2);
+
+    connect(button1, &QAbstractButton::clicked, this, &Card_A::button1Slot);
+    connect(button2, &QAbstractButton::clicked, this, &Card_A::button2Slot);
+}
+
+void Card_A::button1Slot()
+{
+    Card_B* card = new Card_B(controller);
+
+    emit setNewMainWindow(card);
+}
+
+void Card_A::button2Slot()
+{
+    Card_C* card = new Card_C(controller);
+
+    emit setNewMainWindow(card);
+}
+

card_a.h

+#pragma once
+
+#ifndef CARD_A_H
+#define CARD_A_H
+
+#include <QVBoxLayout>
+#include "windowcontroller.h"
+#include "button.h"
+#include "card_b.h"
+#include "card_c.h"
+
+#include "connecttemplates.h"
+
+using controller_ptr = QSharedPointer<WindowController>;
+
+class Card_A : public QVBoxLayout
+{
+    Q_OBJECT
+
+public:
+    Card_A(controller_ptr Controller);
+
+signals:
+    void setNewMainWindow(QVBoxLayout*);
+
+public slots:
+    void button1Slot();
+    void button2Slot();
+
+private:
+   controller_ptr controller;
+
+   Button* button1;
+   Button* button2;
+
+};
+
+#endif // CARD_A_H

card_b.cpp

+#include "card_b.h"
+
+Card_B::Card_B(controller_ptr Controller)
+{
+    controller = Controller;
+
+    connect_to_pointer(this, SIGNAL(Card_B::setNewMainWindow), controller, SLOT(WindowController::handleNewMainWindow));
+
+    button1 = new Button("button 1");
+
+    this->addWidget(button1);
+
+    connect(button1, &QAbstractButton::clicked, this, &Card_B::button1Slot);
+}
+
+void Card_B::button1Slot()
+{
+    std::cout << "hello world" << std::endl;
+}

card_b.h

+#pragma once
+
+#ifndef CARD_B_H
+#define CARD_B_H
+
+#include <QVBoxLayout>
+#include "windowcontroller.h"
+#include "button.h"
+#include <iostream>
+
+#include "connecttemplates.h"
+
+using controller_ptr = QSharedPointer<WindowController>;
+
+class Card_B : public QVBoxLayout
+{
+    Q_OBJECT
+
+public:
+    Card_B(controller_ptr Controller);
+
+signals:
+    void setNewMainWindow(QVBoxLayout*);
+
+public slots:
+    void button1Slot();
+
+private:
+    controller_ptr controller;
+
+    Button* button1;
+};
+
+#endif // CARD_B_H

card_c.cpp

+#include "card_c.h"
+
+#include "card_b.h"
+
+Card_C::Card_C(controller_ptr Controller)
+{
+    controller = Controller;
+
+    connect_to_pointer(this, SIGNAL(Card_C::setNewMainWindow), controller, SLOT(WindowController::handleNewMainWindow));
+
+    button1 = new Button("button 1");
+    button2 = new Button("button 2");
+    button3 = new Button("button 3");
+
+    this->addWidget(button1);
+    this->addWidget(button2);
+    this->addWidget(button3);
+
+    connect(button1, &QAbstractButton::clicked, this, &Card_C::button1Slot);
+    connect(button2, &QAbstractButton::clicked, this, &Card_C::button2Slot);
+    connect(button3, &QAbstractButton::clicked, this, &Card_C::button3Slot);
+
+}
+
+void Card_C::button1Slot()
+{
+    std::cout << "hello world 1" << std::endl;
+}
+
+void Card_C::button2Slot()
+{
+    std::cout << "hello world 2" << std::endl;
+}
+
+void Card_C::button3Slot()
+{
+    std::cout << "hello world 3" << std::endl;
+}
+

card_c.h

+#pragma once
+
+#ifndef CARD_C_H
+#define CARD_C_H
+
+#include <QVBoxLayout>
+#include "windowcontroller.h"
+#include "button.h"
+
+#include "connecttemplates.h"
+
+using controller_ptr = QSharedPointer<WindowController>;
+
+class Card_C : public QVBoxLayout
+{
+    Q_OBJECT
+
+public:
+    Card_C(controller_ptr Controller);
+
+signals:
+    void setNewMainWindow(QVBoxLayout*);
+
+public slots:
+    void button1Slot();
+    void button2Slot();
+    void button3Slot();
+
+private:
+   controller_ptr controller;
+
+   Button* button1;
+   Button* button2;
+   Button* button3;
+};
+
+#endif // CARD_C_H

connecttemplates.h

+#ifndef CONNECTTEMPLATES_H
+#define CONNECTTEMPLATES_H
+
+#endif // CONNECTTEMPLATES_H
+
+#include <QSharedPointer>
+
+template<typename T>
+QMetaObject::Connection connect_from_pointer(
+    const QSharedPointer<T>& sender,
+    const char *signal,
+    const QObject *receiver,
+    const char *method,
+    Qt::ConnectionType type = Qt::AutoConnection)
+{
+    return QObject::connect(sender.data(), signal, receiver, method, type);
+}
+
+/*
+template <typename Func1, typename Func2>
+QMetaObject::Connection connect_from_pointer(
+    const QSharedPointer<typename QtPrivate::FunctionPointer<Func1>::Object>& sender,
+    Func1 signal,
+    const typename QtPrivate::FunctionPointer<Func2>::Object *receiver,
+    Func2 slot,
+    Qt::ConnectionType type = Qt::AutoConnection)
+{
+    return QObject::connect(sender.data(), signal, receiver, slot, type);
+}
+*/
+
+template<class T>
+QMetaObject::Connection connect_to_pointer(
+    const QObject *sender,
+    const char *signal,
+    const QSharedPointer<T>& receiver,
+    const char *method,
+    Qt::ConnectionType type = Qt::AutoConnection)
+{
+    return QObject::connect(sender, signal, receiver.data(), method, type);
+}
+
+/*
+template <typename Func1, typename Func2>
+QMetaObject::Connection connect_to_pointer(
+    const typename QtPrivate::FunctionPointer<Func1>::Object *sender,
+    Func1 signal,
+    const QSharedPointer<typename QtPrivate::FunctionPointer<Func2>::Object>& receiver,
+    Func2 slot,
+    Qt::ConnectionType type)
+{
+    return QObject::connect(sender, signal, receiver.data(), slot, type);
+}
+
+template<class T, class U>
+QMetaObject::Connection connect_pointers(
+    const QSharedPointer<T>& sender,
+    const char *signal,
+    const QSharedPointer<U>& receiver,
+    const char *method,
+    Qt::ConnectionType type = Qt::AutoConnection)
+{
+    return QObject::connect(sender.data(), signal, receiver.data(), method, type);
+}
+*/
+
+template <typename Func1, typename Func2>
+QMetaObject::Connection connect_pointers(
+    const QSharedPointer<typename QtPrivate::FunctionPointer<Func1>::Object>& sender,
+    Func1 signal,
+    const QSharedPointer<typename QtPrivate::FunctionPointer<Func2>::Object>& receiver,
+    Func2 slot,
+    Qt::ConnectionType type = Qt::AutoConnection)
+{
+    return QObject::connect(sender.data(), signal, receiver.data(), slot, type);
+}
+

controller-test-3.pro

+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+CONFIG += c++11
+
+# The following define makes your compiler emit warnings if you use
+# any Qt feature that has been marked deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if it uses deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += \
+    button.cpp \
+    card_a.cpp \
+    card_b.cpp \
+    card_c.cpp \
+    main.cpp \
+    mainwindow.cpp \
+    windowcontroller.cpp
+
+HEADERS += \
+    button.h \
+    card_a.h \
+    card_b.h \
+    card_c.h \
+    connecttemplates.h \
+    mainwindow.h \
+    windowcontroller.h
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

controller-test-3.pro.user

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main.cpp

+#include "mainwindow.h"
+#include "windowcontroller.h"
+#include "card_a.h"
+
+#include <QApplication>
+
+using controller_ptr = QSharedPointer<WindowController>;
+
+#include "connecttemplates.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    MainWindow* w = new MainWindow;
+
+    controller_ptr controller = controller_ptr(new WindowController);
+
+    connect_from_pointer(controller, SIGNAL(WindowController::setNewMainWindow), w, SLOT(MainWindow::handleNewMainWindow));
+
+    Card_A* card_a = new Card_A(controller);
+
+    w->handleNewMainWindow(card_a);
+    w->show();
+
+    return a.exec();
+}

mainwindow.cpp

+#include "mainwindow.h"
+
+MainWindow::MainWindow(QWidget *parent)
+{
+}
+
+MainWindow::~MainWindow()
+{
+}
+
+void MainWindow::handleNewMainWindow(QVBoxLayout* layout)
+{
+    delete this->layout();
+    qDeleteAll(this->children());
+    this->setLayout(layout);
+}

mainwindow.h

+#pragma once
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QDialog>
+#include <QVBoxLayout>
+
+class MainWindow : public QDialog
+{
+    Q_OBJECT
+
+public:
+    MainWindow(QWidget *parent = nullptr);
+    ~MainWindow();
+
+public slots:
+    void handleNewMainWindow(QVBoxLayout* layout);
+
+private:
+};
+#endif // MAINWINDOW_H

windowcontroller.cpp

+#include "windowcontroller.h"
+
+WindowController::WindowController()
+{
+
+}
+
+void WindowController::handleNewMainWindow(QVBoxLayout* layout)
+{
+    emit newMainWindow(layout);
+}

windowcontroller.h

+#pragma once
+
+#ifndef WINDOWCONTROLLER_H
+#define WINDOWCONTROLLER_H
+
+#include <QVBoxLayout>
+#include <QWidget>
+
+class WindowController : public QObject
+{
+    Q_OBJECT
+
+public:
+    WindowController();
+
+public slots:
+    void handleNewMainWindow(QVBoxLayout* layout);
+
+signals:
+    void newMainWindow(QVBoxLayout* layout);
+};
+
+#endif // WINDOWCONTROLLER_H