Qt_7 - 8BitsCoding/RobotMentor GitHub Wiki

#include <QtCore/qdebug.h>

qDebug() << "MyDialog constructor called" << endl;
qDebug() << "MyDialog destuctor called" << endl;

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);

	MyDialog* dialog = new MyDialog;

	QObject::connect(dialog, SIGNAL(onKeywordMatched(const QString&)), &app, SLOT(quit()));

	dialog->show();

	return app.exec();
}

MyDialog::~MyDialog()
{
	qDebug() << "MyDialog destuctor called" << endl;
}

MyDialog dialog;

#pragma once
#include <qwidget.h>
#include <QtWidgets/QPushButton.h>

class mywidget : public QWidget
{
	Q_OBJECT
public:
	explicit mywidget(QWidget* parent = 0);
	virtual ~mywidget();

	QPushButton* button;
	
signals:

public slots:
};

#include "mywidget.h"
#include <iostream>
#include <QtCore/qdebug.h>
#include <QtWidgets/qlayout.h>

using namespace std;

mywidget::mywidget(QWidget* parent) : QWidget(parent)
{
	qDebug() << "mywidget constructor called" << endl;
	button = new QPushButton;

	QHBoxLayout* layout = new QHBoxLayout;
	layout->addWidget(button);

	setLayout(layout);
}

mywidget::~mywidget()
{
	qDebug() << "mywidget destructor called" << endl;
}

// mydialog.h
class QLineEdit;
class mywidget;

class MyDialog : public QDialog{
	Q_OBJECT
public:
	explicit MyDialog(QDialog* parent = nullptr);
	virtual ~MyDialog();

	QLineEdit* lineEdit;
	mywidget* widget;

// mydialog.cpp
#include <mywidget.h>
		
using namespace std;

MyDialog::MyDialog(QDialog* parent) : QDialog(parent) {
	qDebug() << "MyDialog constructor called" << endl;
	lineEdit = new QLineEdit;
	widget = new mywidget;

	QObject::connect(lineEdit, SIGNAL(textChanged(const QString&)), this, SLOT(myTextChangd(const QString&)));

	QVBoxLayout* layout = new QVBoxLayout;
	layout->addWidget(lineEdit);
	layout->addWidget(widget);

	setLayout(layout);
}