47127297

47127297.pro

#-------------------------------------------------
#
# Project created by QtCreator 2017-11-05T18:00:50
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = example
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as 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 you use 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 += \
        main.cpp

HEADERS +=

main.cpp

#include <QApplication>
#include <QPushButton>
#include <QVBoxLayout>
#include <QWidget>
#include <QLabel>

class LogWindow: public QWidget{
    Q_OBJECT
public:
    LogWindow(const QString &text, QWidget *parent=Q_NULLPTR):QWidget(parent){
        setLayout(new QVBoxLayout);
        btn = new QPushButton(text, this);
        layout()->addWidget(btn);
        connect(btn, &QPushButton::clicked, this, &LogWindow::customSignal);
    }
signals:
    void customSignal();
private:
    QPushButton *btn;
};

class RegWindow : public QWidget{
    QLabel *label;
public:
    RegWindow(const QString &text, QWidget *parent=Q_NULLPTR):QWidget(parent){
        setLayout(new QVBoxLayout);
        label = new QLabel(text, this);
        layout()->addWidget(label);
    }
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    LogWindow *log= new LogWindow("LogWindow");
    RegWindow *reg;
    QObject::connect(log, &LogWindow::customSignal, [&reg, &log](){
        reg = new RegWindow("RegWindow");
        reg->show();
        log->deleteLater();
    });
    log->show();
    return a.exec();
}

#include "main.moc"