CalculatorWidget::CalculatorWidget(QWidget *parent, Qt::WindowFlags flags) : QWidget(parent, flags) {
QGridLayout *layout = new QGridLayout(this);
layout->setSizeConstraint(QLayout::SetFixedSize);
setLayout(layout);
QSizePolicy policy = sizePolicy();
displayLabel = new QLabel(this);
layout->addWidget(displayLabel, 0, 0, 1, 3);
displayLabel->setAutoFillBackground(true);
displayLabel->setBackgroundRole(QPalette::Base);
displayLabel->setAlignment(Qt::AlignRight);
displayLabel->setFrameStyle(QFrame::Panel | QFrame::Sunken);
policy = displayLabel->sizePolicy();
policy.setVerticalPolicy(QSizePolicy::Fixed);
displayLabel->setSizePolicy(policy);
signalMapper = new QSignalMapper(this);
QPushButton *button = new QPushButton(QString::number(0), this);
QObject::connect(button, SIGNAL(clicked()), signalMapper, SLOT(map()));
signalMapper->setMapping(button, 0);
layout->addWidget(button, 4, 1);
digitButtons.push_back(button);
for (unsigned int i = 1; i < 10; ++i) {
QPushButton *button = new QPushButton(QString::number(i), this);
QObject::connect(button, SIGNAL(clicked()), signalMapper, SLOT(map()));
signalMapper->setMapping(button, i);
layout->addWidget(button, 1+(9-i)/3, (i-1)%3);
digitButtons.push_back(button);
}
QObject::connect(signalMapper, SIGNAL(mapped(int)), SLOT(buttonClicked(int)));
clearButton = new QPushButton("C", this);
layout->addWidget(clearButton, 1, 4);
QObject::connect(clearButton, SIGNAL(clicked()), SLOT(clearButtonClicked()));
additionButton = new QPushButton("+", this);
layout->addWidget(additionButton, 2, 4);
QObject::connect(additionButton, SIGNAL(clicked()), SLOT(addButtonClicked()));
subtractionButton = new QPushButton("-", this);
layout->addWidget(subtractionButton, 3, 4);
QObject::connect(subtractionButton, SIGNAL(clicked()), SLOT(subtractButtonClicked()));
calculateButton = new QPushButton("=", this);
layout->addWidget(calculateButton, 4, 4);
QObject::connect(calculateButton, SIGNAL(clicked()), SLOT(calculateButtonClicked()));
}
void Program::init()
{
window = new MainWindow(0x0);
connect( window, SIGNAL(calculateButtonClicked()), this, SLOT(processCalculating()) );
connect( window, SIGNAL(drawButtonClicked()), this, SLOT(processLineDraw()) );
}
