#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QPushButton>
#include <QHBoxLayout>
#include <QComboBox>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    connect( ui->applyStyle, &QPushButton::clicked, this, &MainWindow::applyStyle );
    connect( ui->addBox, &QPushButton::clicked, this, &MainWindow::addBox );
}


MainWindow::~MainWindow()
{
    delete ui;
}


void MainWindow::applyStyle( void )
{
    // apply style sheet to whole application (gray background and white foreground color)
    QApplication* app = static_cast< QApplication* >( QApplication::instance() );
    app->setStyleSheet( "QWidget { background-color: gray; color: white; }" );
}


void MainWindow::addBox( void )
{
    QHBoxLayout* layout = new QHBoxLayout();

    // add a QComboBox to the new row
    auto box = new QComboBox();
    layout->addWidget(box);

    // add a QPushButton to the new row, which enables editing of the assosiated QComboBox if clicked
    auto enable = new QPushButton( "Editable");
    connect( enable, &QPushButton::clicked,  [=]() -> void { box->setEditable( true ); } );
    layout->addWidget(enable);

    // add a QPushButton to the new row, which disables editing of the assosiated QComboBox if clicked
    auto disable = new QPushButton( "!Editable" );
    connect( disable, &QPushButton::clicked, [=]() -> void { box->setEditable( false ); } );
    layout->addWidget(disable);

    // add new row to vertical layout in main window
    ui->boxLayout->addLayout( layout );
}