MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->gridLayout->addWidget(ui->text, 1, 1, 1, 3);
QPushButton *clearButton = new QPushButton("C");
ui->gridLayout->addWidget(clearButton, 1, 4);
connect(clearButton, SIGNAL(clicked()), this, SLOT(clearButtonClicked()));
QPushButton *equalButton = new QPushButton("=");
ui->gridLayout->addWidget(equalButton, 5, 3);
connect(equalButton, SIGNAL(clicked()), this, SLOT(equalButtonClicked()));
QPushButton *pointButton = new QPushButton(".");
ui->gridLayout->addWidget(pointButton, 5, 2);
connect(pointButton, SIGNAL(clicked()), this, SLOT(pointButtonClicked()));
///Making signals for operations
QSignalMapper *operationMapper = new QSignalMapper;
connect(operationMapper, SIGNAL(mapped(const QString &)), this, SLOT(operationButtonClicked(const QString &)));
for (int i = 0; i < 4; i++) {
QString *operation = new QString;
if (i == 0)
operation[0] = '+';
else if (i == 1)
operation[0] = '-';
else if (i == 2)
operation[0] = '*';
else if (i == 3)
operation[0] = '/';
QPushButton *newOperationButton = new QPushButton(*operation);
ui->gridLayout->addWidget(newOperationButton, i + 2, 4);
connect(newOperationButton, SIGNAL(clicked()), operationMapper, SLOT(map()));
operationMapper->setMapping(newOperationButton, *operation);
}
///Making signals for digits
QSignalMapper *digitMapper = new QSignalMapper;
connect(digitMapper, SIGNAL(mapped(const QString &)), this, SLOT(digitButtonClicked(const QString &)));
for (int i = 0; i < 10; i++) {
QPushButton *newDigitButton = new QPushButton(QString::number(i));
if (i == 0)
ui->gridLayout->addWidget(newDigitButton, 5, 1);
else {
int row = 4 - ((i - 1) / 3);
int column = ((i - 1) % 3) + 1;
ui->gridLayout->addWidget(newDigitButton, row, column);
}
connect(newDigitButton, SIGNAL(clicked()), digitMapper, SLOT(map()));
digitMapper->setMapping(newDigitButton, QString::number(i));
}
}
void MainWindow::operationButtonClicked(const QString &operation) {
if (calc.state == firstNumberInt || calc.state == firstNumberFraction || calc.state == mathOperation || calc.state == showAnswer) {
calc.addOperation(operation);
} else if (calc.state == secondNumberInt || calc.state == secondNumberFraction) {
equalButtonClicked();
if (ui->text->text() != "ERROR")
calc.addOperation(operation);
}
}
QLayout *Calculator::setupOperatorButtons()
{
QPushButton *buttonDiv = new QPushButton(operatorSymbolDiv);
QPushButton *buttonMul = new QPushButton(operatorSymbolMul);
QPushButton *buttonSub = new QPushButton(operatorSymbolSub);
QPushButton *buttonAdd = new QPushButton(operatorSymbolAdd);
QPushButton *buttonEqual = new QPushButton("=");
buttonDiv->setObjectName("buttonDiv");
buttonMul->setObjectName("buttonMul");
buttonSub->setObjectName("buttonSub");
buttonAdd->setObjectName("buttonAdd");
buttonEqual->setObjectName("buttonEqual");
QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(buttonDiv);
layout->addWidget(buttonMul);
layout->addWidget(buttonSub);
layout->addWidget(buttonAdd);
layout->addWidget(buttonEqual);
connect(buttonDiv,SIGNAL(clicked()),this,SLOT(operatorButtonClicked()));
connect(buttonMul,SIGNAL(clicked()),this,SLOT(operatorButtonClicked()));
connect(buttonSub,SIGNAL(clicked()),this,SLOT(operatorButtonClicked()));
connect(buttonAdd,SIGNAL(clicked()),this,SLOT(operatorButtonClicked()));
connect(buttonEqual,SIGNAL(clicked()),this,SLOT(equalButtonClicked()));
m_operatorMap[buttonDiv] = &Calculator::calculateDiv;
m_operatorMap[buttonMul] = &Calculator::calculateMul;
m_operatorMap[buttonSub] = &Calculator::calculateSub;
m_operatorMap[buttonAdd] = &Calculator::calculateAdd;
m_operatorSymbol[buttonDiv] = operatorSymbolDiv;
m_operatorSymbol[buttonMul] = operatorSymbolMul;
m_operatorSymbol[buttonSub] = operatorSymbolSub;
m_operatorSymbol[buttonAdd] = operatorSymbolAdd;
return layout;
}
