Step 6: Getting rotation sensor data

1. Define the updateRotation() slot method to read the rotation sensor data and to output data to the screen when the reading is changed by adding the following lines to sensorsapidialog.h:
public slots: /** * Called when the readings are changed. */ void updateRotation(); void lock();
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2. Connect the readingChanged signal of the rotationSensor to the updateRotation slot method by adding the following line of code to the constructor in sensorsapidialog.cpp:
SensorsAPIDialog::SensorsAPIDialog(QWidget *parent) : QDialog(parent), ui(new Ui::SensorsAPIDialog) { ui->setupUi(this); // Connect the lockButton clicked() signal to the lock() slot method connect(ui->lockButton, SIGNAL(clicked(bool)), SLOT(lock())); // Connect the quitButton clicked() signal to the close() slot method connect(ui->quitButton, SIGNAL(clicked(bool)), SLOT(close())); // Start the sensors setupGeneral(); // Connect the readingChanged() signals to the update slot methods connect(rotationSensor, SIGNAL(readingChanged()), SLOT(updateRotation())); }
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3. Implement the updateRotation() method in sensorsapidialog.cpp to read the rotation sensor data and to output data to the screen:
void SensorsAPIDialog::updateRotation() { QRotationReading *rotReading = rotationSensor->reading(); QString output = QString("Rotation: %1 x %2 y %3 z"). arg(rotReading->x()). arg(rotReading->y()). arg(rotReading->z()); ui->RotationValue->setText(output); }
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