Qt 5.7 | Qt Designer Manual | Calculator Builder Example | calculatorform.cpp Example File

Qt 5.7.1 Reference Documentation

# calculatorform.cpp Example File

calculatorbuilder/calculatorform.cpp

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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()));
      }