Added translator that uses google trnslation web page instead of direct API.

GoogleWebTranslator.cpp

@@ -0,0 +1,91 @@
+#include <QWebView>
+#include <QWebFrame>
+#include <QWebElement>
+#include <QSettings>
+#include <QNetworkReply>
+#include <QTimer>
+
+#include "GoogleWebTranslator.h"
+#include "Settings.h"
+
+GoogleWebTranslator::GoogleWebTranslator()
+  : QObject (), view_ (new QWebView),
+    isLoadFinished_ (true), isTranslationFinished_ (false) {
+
+  view_->settings()->setAttribute(QWebSettings::AutoLoadImages, false);
+  connect (view_, SIGNAL (loadStarted()), this, SLOT (loadStarted()));
+  connect (view_, SIGNAL (loadFinished(bool)), this, SLOT (loadFinished(bool)));
+
+  connect (view_->page()->networkAccessManager(), SIGNAL (finished(QNetworkReply*)),
+           this, SLOT(replyFinished(QNetworkReply*)));
+  applySettings ();
+}
+
+GoogleWebTranslator::~GoogleWebTranslator() {
+  delete view_;
+}
+
+void GoogleWebTranslator::translate(ProcessingItem item) {
+  queue_.push_back (item);
+  if (isLoadFinished_) {
+    load (item);
+  }
+}
+
+void GoogleWebTranslator::applySettings(){
+  QSettings settings;
+  settings.beginGroup (settings_names::translationGroup);
+  translationLanguage_ = settings.value (settings_names::translationLanguage,
+                                         settings_values::translationLanguage).toString ();
+}
+
+void GoogleWebTranslator::loadStarted() {
+  isLoadFinished_ = false;
+  isTranslationFinished_ = false;
+}
+
+void GoogleWebTranslator::loadFinished(bool ok) {
+  isLoadFinished_ = true;
+  if (ok && !isTranslationFinished_) {
+      return;
+  }
+
+  Q_ASSERT (!queue_.isEmpty());
+  ProcessingItem item = queue_.front();
+  queue_.pop_front();
+  if (ok) {
+    QWebElementCollection result = view_->page()->mainFrame()->findAllElements("#result_box > span");
+    item.translated = "";
+    foreach (const QWebElement& element, result) {
+      item.translated += element.toInnerXml() + " ";
+    }
+    emit translated(item, !item.translated.isEmpty());
+  }
+  else {
+    emit translated (item, false);
+  }
+
+  if (!queue_.isEmpty()) {
+    load (queue_.front());
+  }
+}
+
+void GoogleWebTranslator::replyFinished(QNetworkReply *reply)
+{
+  if (reply->url().toString().contains ("/translate_a/single")) {
+    isTranslationFinished_ = true;
+    if (isLoadFinished_) {
+      QTimer::singleShot(2000, this, SLOT(loadFinished()));
+    }
+  }
+}
+
+void GoogleWebTranslator::load(const ProcessingItem &item) {
+  Q_ASSERT (!item.recognized.isEmpty ());
+  if (translationLanguage_.isEmpty ()) {
+    emit error (tr ("Неверные парметры для перевода."));
+    return;
+  }
+  QUrl url (QString ("https://translate.google.com/#auto/%1/%2").arg(translationLanguage_, item.recognized));
+  view_->setUrl(url);
+}

GoogleWebTranslator.h

@@ -0,0 +1,43 @@
+#ifndef GOOGLEWEBTRANSLATOR_H
+#define GOOGLEWEBTRANSLATOR_H
+
+#include <QObject>
+
+#include "ProcessingItem.h"
+
+class QWebView;
+class QUrl;
+class QNetworkReply;
+
+class GoogleWebTranslator : public QObject
+{
+    Q_OBJECT
+  public:
+    GoogleWebTranslator();
+    ~GoogleWebTranslator();
+
+  signals:
+    void translated (ProcessingItem item, bool success);
+    void error (QString text);
+
+  public slots:
+    void translate (ProcessingItem item);
+    void applySettings ();
+
+  private slots:
+    void loadStarted ();
+    void loadFinished(bool ok=true);
+    void replyFinished(QNetworkReply * reply);
+
+  private:
+    void load (const ProcessingItem& item);
+
+  private:
+    QVector<ProcessingItem> queue_;
+    QString translationLanguage_;
+    QWebView *view_;
+    bool isLoadFinished_;
+    bool isTranslationFinished_;
+};
+
+#endif // GOOGLEWEBTRANSLATOR_H

ScreenTranslator.pro

@@ -26,7 +26,8 @@ SOURCES += main.cpp\
     ResultDialog.cpp \
     ProcessingItem.cpp \
     ImageProcessing.cpp \
-    LanguageHelper.cpp
+    LanguageHelper.cpp \
+    GoogleWebTranslator.cpp
 
 HEADERS  += \
     Manager.h \
@@ -39,7 +40,8 @@ HEADERS  += \
     ProcessingItem.h \
     ResultDialog.h \
     ImageProcessing.h \
-    LanguageHelper.h
+    LanguageHelper.h \
+    GoogleWebTranslator.h
 
 FORMS    += \
     SettingsEditor.ui \