Qt 1.6 | Enginio Manual | Enginio C++ Examples - Image Gallery | mainwindow.cpp Example File

Qt 1.6.3 Reference Documentation

# 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()));
      }