mainwindow.cpp Example File

image-gallery-cpp/mainwindow.cpp

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  #include <QtWidgets>
  #include <QDebug>
  #include <QFrame>
  #include <QLabel>
  #include <QListView>
  #include <QMenu>
  #include <QNetworkAccessManager>
  #include <QPushButton>
  #include <QTimer>
  #include <QVBoxLayout>

  #include <enginioclient.h>
  #include <enginioreply.h>

  // To get the backend right, we use a helper class in the example.
  // Usually one would just insert the backend information below.
  #include "backendhelper.h"

  #include "imageobject.h"
  #include "mainwindow.h"
  #include "imagemodel.h"

  MainWindow::MainWindow(QWidget *parent)
      : QMainWindow(parent)
  {
      setWindowTitle(QStringLiteral("Enginio Image Gallery"));

      m_client = new EnginioClient(this);
      m_client->setBackendId(backendId("image-gallery"));

      m_model = new ImageModel(this);
      m_model->setClient(m_client);

      m_view = new QListView;
      m_view->setModel(m_model);
      m_view->setViewMode(QListView::IconMode);
      m_view->setGridSize(QSize(104, 104));

      m_fileDialog = new QFileDialog(this);
      m_fileDialog->setFileMode(QFileDialog::ExistingFile);
      m_fileDialog->setNameFilter("Image files (*.png *.jpg *.jpeg)");
      connect(m_fileDialog, SIGNAL(fileSelected(QString)),
              this, SLOT(fileSelected(QString)));

      m_uploadButton = new QPushButton("Upload image");
      connect(m_uploadButton, SIGNAL(clicked()),
              m_fileDialog, SLOT(show()));

      QFrame *frame = new QFrame;
      QVBoxLayout *windowLayout = new QVBoxLayout(frame);
      windowLayout->addWidget(m_view);
      windowLayout->addWidget(m_uploadButton);
      setCentralWidget(frame);

      queryImages();
  }

  QSize MainWindow::sizeHint() const
  {
      return QSize(500, 700);
  }

  void MainWindow::queryImages()
  {
      QJsonObject query;
      query.insert("objectType", QStringLiteral("objects.image"));
      QJsonObject fileObject;
      fileObject.insert("file", QJsonObject());

      // Use include parameter to request full "file" object for every result
      // object including image and thumbnail URLs.
      query.insert("include", fileObject);

      // Filter out objects which have not yet been uploaded completely
      QJsonObject filter;
      QJsonObject exists;
      exists.insert("$exists", true);
      filter.insert("file.id", exists);
      query.insert("query", filter);

      m_model->setQuery(query);
  }

  void MainWindow::error(EnginioReply *error)
  {
      qWarning() << Q_FUNC_INFO << error;
  }

  void MainWindow::fileSelected(const QString &filePath)
  {
      if (filePath.isEmpty())
          return;

      QJsonObject object;
      object.insert("objectType", QString("objects.image"));
      QString fileName = filePath.split(QDir::separator()).last();
      object.insert("name", fileName);
      object.insert("localPath", filePath);
      EnginioReply *reply = m_model->append(object);
      connect(reply, SIGNAL(finished(EnginioReply*)), this, SLOT(beginUpload(EnginioReply*)));
  }

  void MainWindow::beginUpload(EnginioReply *reply)
  {
      reply->deleteLater();
      QString path = reply->data().value("localPath").toString();
      QString objectId = reply->data().value("id").toString();

      QJsonObject object;
      object.insert("id", objectId);
      object.insert("objectType", QStringLiteral("objects.image"));
      object.insert("propertyName", QStringLiteral("file"));

      QJsonObject fileObject;
      fileObject.insert(QStringLiteral("fileName"), path);

      QJsonObject uploadJson;
      uploadJson.insert(QStringLiteral("targetFileProperty"), object);
      uploadJson.insert(QStringLiteral("file"), fileObject);

      EnginioReply *upload = m_client->uploadFile(uploadJson, QUrl::fromUserInput(path));
      connect(upload, SIGNAL(finished(EnginioReply*)), upload, SLOT(deleteLater()));
  }