- Qt 5.5
- Qt Designer Manual
- Calculator Builder Example
- calculatorform.cpp Example File
- Qt 5.5.1 Reference Documentation

# calculatorform.cpp Example File

calculatorbuilder/calculatorform.cpp

    /****************************************************************************
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    ** This file is part of the examples of the Qt Toolkit.
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    #include <QtUiTools>
    #include <QSpinBox>
    #include <QLabel>
    #include <QVBoxLayout>
    #include <QFile>

    #include "calculatorform.h"

    CalculatorForm::CalculatorForm(QWidget *parent)
        : QWidget(parent)
    {
        QUiLoader loader;

        QFile file(":/forms/calculatorform.ui");
        file.open(QFile::ReadOnly);
        QWidget *formWidget = loader.load(&file, this);
        file.close();

        ui_inputSpinBox1 = findChild<QSpinBox*>("inputSpinBox1");
        ui_inputSpinBox2 = findChild<QSpinBox*>("inputSpinBox2");
        ui_outputWidget = findChild<QLabel*>("outputWidget");

        QMetaObject::connectSlotsByName(this);

        QVBoxLayout *layout = new QVBoxLayout;
        layout->addWidget(formWidget);
        setLayout(layout);

        setWindowTitle(tr("Calculator Builder"));
    }

    void CalculatorForm::on_inputSpinBox1_valueChanged(int value)
    {
        ui_outputWidget->setText(QString::number(value + ui_inputSpinBox2->value()));
    }

    void CalculatorForm::on_inputSpinBox2_valueChanged(int value)
    {
        ui_outputWidget->setText(QString::number(value + ui_inputSpinBox1->value()));
    }