Qt 5.11 | Qt Sensors | Qt Sensors - C++ Sensor Gestures Example | mainwindow.cpp Example File

Qt 5.11.3 Reference Documentation

# mainwindow.cpp Example File

sensorgestures/mainwindow.cpp

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      #include <QtCore/QDebug>
      #include <QtWidgets/QTreeWidget>

      #include "mainwindow.h"
      #include "ui_mainwindow.h"

      #include <qsensorgesture.h>
      #include <qsensorgesturemanager.h>

      MainWindow::MainWindow(QWidget *parent)
          : QMainWindow(parent),
            ui(new Ui::MainWindow)
      {
          ui->setupUi(this);

          QSensorGestureManager manager;

          Q_FOREACH (const QString &gesture, manager.gestureIds()) {

              QTreeWidgetItem *gestureId = new QTreeWidgetItem(ui->treeWidget);
              QStringList recognizerSignals =  manager.recognizerSignals(gesture);
              gestureId->setText(0,gesture);

              for (int i = 0; i < recognizerSignals.count(); i++) {
                  QTreeWidgetItem *oneSignal = new QTreeWidgetItem(gestureId);
                  oneSignal->setText(0,recognizerSignals.at(i));
              }
              ui->treeWidget->insertTopLevelItem(0,gestureId);
          }

          ui->textEdit->setReadOnly(true);
      }

      MainWindow::~MainWindow()
      {
          delete ui;
      }

      void MainWindow::detectedShake(const QString &name)
      {
          QString str = "<font size=+2><B>"+name+"</b></font><br>";
          ui->textEdit->insertHtml(str);
          ui->textEdit->ensureCursorVisible();
      }

      void MainWindow::on_pushButton_clicked()
      {
          ui->textEdit->clear();
      }

      void MainWindow::onShake()
      {
          QString str = "<font size=+2><B>onShake()</b></font><br>";
          ui->textEdit->insertHtml(str);
          ui->textEdit->ensureCursorVisible();
      }

      void MainWindow::on_startPushButton_clicked()
      {
          if (ui->treeWidget->currentItem() == 0)
                  return;
          QString currentRecognizer;

          if (ui->treeWidget->currentItem()->childCount() == 0) {
              currentRecognizer = ui->treeWidget->currentItem()->parent()->text(0);
          } else {
              currentRecognizer = ui->treeWidget->currentItem()->text(0);
          }

          if (recognizerMap.contains(currentRecognizer))
              return;
          QSensorGestureManager manager;
          QSensorGesture *thisGesture = new QSensorGesture(QStringList() << currentRecognizer, this);

          if (currentRecognizer.contains("QtSensors.shake")) {
              connect(thisGesture,SIGNAL(shake()),
                      this,SLOT(onShake()));
          }

          connect(thisGesture,SIGNAL(detected(QString)),
                  this,SLOT(detectedShake(QString)));
          thisGesture->startDetection();

          recognizerMap.insert(currentRecognizer,thisGesture);

          QString str = QString("<font size=+2><B>Started %1</b></font><br>").arg(currentRecognizer);
          ui->textEdit->insertHtml(str);
          ui->textEdit->ensureCursorVisible();
      }

      void MainWindow::on_stopPushButton_clicked()
      {
          if (ui->treeWidget->currentItem() == 0)
                  return;
          QString currentRecognizer;

          if (ui->treeWidget->currentItem()->childCount() == 0) {
              currentRecognizer = ui->treeWidget->currentItem()->parent()->text(0);
          } else {
              currentRecognizer = ui->treeWidget->currentItem()->text(0);
          }

          if (!recognizerMap.contains(currentRecognizer))
              return;

              recognizerMap[currentRecognizer]->stopDetection();

              if (currentRecognizer == "QtSensors.shake") {
                  disconnect(recognizerMap[currentRecognizer],SIGNAL(shake()),
                             this,SLOT(onShake()));
              }
              disconnect(recognizerMap[currentRecognizer],SIGNAL(detected(QString)),
                         this,SLOT(detectedShake(QString)));

              recognizerMap.take(currentRecognizer);

          QString str = QString("<font size=+2><B>Stopped %1</b></font><br>").arg(currentRecognizer);
          ui->textEdit->insertHtml(str);
          ui->textEdit->ensureCursorVisible();
      }