helpWidget.cc

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*                              OpenFlipper                                   *
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#include "helpWidget.hh"
 
#include <OpenFlipper/common/GlobalOptions.hh>
 
//#define DEBUG_HELP_CONTENTS
 
HelpWidget::HelpWidget(QWidget* parent, const QString& _homeSite /*=""*/, const bool _loadHomeSite /*= true*/)
  : QMainWindow(parent),
  searchWidget_(0),
  tabWidget_(0),
  textWindow_(0),
  helpEngine_(0),
  searchEngine_(0) {
 
  setupUi(this);
 
  homeSite_ = _homeSite;
 
  QString filename = QString( OpenFlipper::Options::configDirStr() );
  filename += OpenFlipper::Options::dirSeparator();
  filename += "Help.qhc";
    
  QDir helpDir = QDir(OpenFlipper::Options::helpDirStr());
 
  QString iconPath = QString(OpenFlipper::Options::iconDirStr())+QString(OpenFlipper::Options::dirSeparator());
 
  // Set Buttons
  backButton_->setIcon(QIcon(iconPath+"arrow-left.png"));
  forwardButton_->setIcon(QIcon(iconPath+"arrow-right.png"));
  homeButton_->setIcon(QIcon(iconPath+"go-home.png"));
  searchButton_->setIcon(QIcon(iconPath+"edit-find.png"));
 
  tabWidget_ = new QTabWidget(this);
 
  // Generate the help engine. The filename is in the users home directory and
  // contains all registered help resources.
  helpEngine_ = new QHelpEngine(filename, this);
  
  helpEngine_->setupData();
  
  // Get all currently registered nameSpaces
  QStringList registeredNamespaces =helpEngine_->registeredDocumentations();
 
  QStringList documentationFiles;
 
  // Get a list of all loaded documentation files from the namespaces
  QStringList helpFiles = helpDir.entryList(QStringList("*.qch"),QDir::Files);
 
  // Write absolute path into filenames
  for (QStringList::iterator iter = helpFiles.begin(); iter != helpFiles.end(); ++iter)
    *iter = helpDir.path()+ OpenFlipper::Options::dirSeparator() + *iter;
 
  for ( int i = 0; i < registeredNamespaces.size() ; ++i)
  {
    QString registredFilename (helpEngine_->documentationFileName(registeredNamespaces[i]));
 
    // re-register documentation if location changed
    if (helpFiles.indexOf(registredFilename) != -1)
      documentationFiles.push_back( registredFilename );
    else
      helpEngine_->unregisterDocumentation(registeredNamespaces[i]);
  }
 
  for ( int i = 0 ; i < helpFiles.size() ; ++i ) {
    const QString currentFilename = helpFiles[i];
 
    // Don't register files twice (stored between multiple OpenFlipper executions)
    if (documentationFiles.contains(currentFilename))
      continue;
 
    // Try to register the file
    if ( !helpEngine_->registerDocumentation( currentFilename ) ) {
      std::cerr << "Error when trying to register file " << currentFilename.toStdString() << std::endl;
      std::cerr << helpFiles[i].toStdString() << " :" << helpEngine_->error().toStdString() << std::endl;
    }
 
  }
 
  searchEngine_ = new QHelpSearchEngine(helpEngine_, this);
 
  textWindow_ = new HelpBrowser(helpEngine_, this);
 
  homeIndex_ = tabWidget_->addTab(textWindow_, tr("Home"));
 
  gridLayout_->addWidget(helpEngine_->contentWidget(), 1, 0);
  gridLayout_->addWidget(tabWidget_, 1, 1);
 
  gridLayout_->setColumnStretch(0, 1);
  gridLayout_->setColumnStretch(1, 3);
 
  // Search popup at bottom of window
  searchWidget_ = new QDockWidget(tr("Search results"), this);
  searchWidget_->setFeatures( QDockWidget::DockWidgetClosable );
 
  searchWidget_->resize(this->size().width(), floor( double(this->size().height() / 3)) );
 
  searchWidget_->setWidget(searchEngine_->queryWidget());
  //searchWidget_->setWidget(results_);
 
  searchWidget_->hide();
  addDockWidget(Qt::BottomDockWidgetArea, searchWidget_);
 
 
  // Entry in tree view has been clicked
  connect(helpEngine_->contentWidget(), SIGNAL(linkActivated(const QUrl&)),
          this, SLOT(linkActivated(const QUrl&)));
 
  // Search button
  connect(searchButton_, SIGNAL(clicked()), this, SLOT(showSearchWidget()));
 
  // Search button
  connect(searchEngine_->queryWidget(), SIGNAL(search()), this, SLOT(startSearch()));
 
  // Show results if search is finished
  connect(searchEngine_, SIGNAL(searchingFinished(int)), this, SLOT(showResults(int)));
 
  // Show results if search is finished
  connect(searchEngine_->resultWidget(), SIGNAL(requestShowLink(const QUrl&)),
              this, SLOT(showFoundSite(const QUrl&)));
 
  // Back button
  connect(backButton_, SIGNAL(clicked()), this, SLOT(goBack()));
 
  // Forward button
  connect(forwardButton_, SIGNAL(clicked()), this, SLOT(goForward()));
 
  // Forward button
  connect(homeButton_, SIGNAL(clicked()), this, SLOT(goHome()));
 
  // Source has been reloaded, so the buttons need an update and the modelview
  connect(textWindow_, SIGNAL(sourceChanged(const QUrl&)), this, SLOT(update(const QUrl&)));
 
  // the history has changed, so the buttons need an update
  connect(textWindow_, SIGNAL(historyChanged(const QUrl&)), this, SLOT(updateButtons()));
 
  // Register documentation
  // Seems to be an unneeded call!
  //helpEngine_->registerDocumentation(filename);
 
  #ifdef DEBUG_HELP_CONTENTS
 
  QStringList tmp = helpEngine_->registeredDocumentations ();
 
  for ( int i = 0 ; i < tmp.size(); ++i) {
    std::cerr << "=========================================================================================" << std::endl;
    std::cerr << "Registered namespace: " << tmp[i].toStdString() << std::endl;
    std::cerr << "From file : " << helpEngine_->documentationFileName(tmp[i]).toStdString() << std::endl;
 
 
    QList<QStringList> filterAttribs = helpEngine_->filterAttributeSets (tmp[i]);
//    std::cerr << "Filter attributes:" << std::endl;
//    for ( int j = 0 ; j < filterAttribs.size(); ++j) {
//      for ( int k = 0 ; k < filterAttribs[j].size(); ++k) {
//        std::cerr <<  filterAttribs[j][k].toStdString() << std::endl;
//      }
//    }
 
    // Print a list of all files included in this help file
    if ( !filterAttribs.empty() ) {
      QList<QUrl> list = helpEngine_->files ( tmp[i], filterAttribs[0]);
      for ( int j = 0 ; j < list.size(); ++j) {
        std::cerr << list[j].toString().toStdString() << std::endl;
      }
    } else {
      std::cerr << "Error, empty filter! Unable to get list of included files." << std::endl;
    }
 
 
  }
  #endif
 
  if (_loadHomeSite)
  {
    // Load main page
    textWindow_->open(QUrl(homeSite_));
  }
}
 
void HelpWidget::activateLink(const QUrl& _url)
{
        //open and show the url
        linkActivated(_url);
}
 
void HelpWidget::linkActivated(const QUrl& _url) {
 
  textWindow_->open(_url);
  tabWidget_->setCurrentIndex(homeIndex_);
}
 
void HelpWidget::startSearch() {
 
  searchEngine_->search(searchEngine_->queryWidget()->searchInput());
}
 
void HelpWidget::setHomeSite(const QString& _homeSite) {
 
  homeSite_ = _homeSite;
}
 
void HelpWidget::showFoundSite(const QUrl& _url) {
 
  textWindow_->open(_url);
  tabWidget_->setCurrentIndex(homeIndex_);
}
 
void HelpWidget::update(const QUrl&  _url ) {
 
  updateButtons();
 
  //search for the entry and select the item in the contentWidget
  //in our case, it is the treeView on the left side
  QUrl newUrl = textWindow_->resolveUrl(_url);
  //search for the selected url
  QModelIndex modelIndex = helpEngine_->contentWidget()->indexOf(newUrl);
 
  //select this url in content widget
  if (modelIndex.isValid())
    helpEngine_->contentWidget()->setCurrentIndex( modelIndex );
}
 
void HelpWidget::goForward() {
 
  textWindow_->forward();
 
  tabWidget_->setCurrentIndex(homeIndex_);
 
  updateButtons();
}
 
void HelpWidget::goBack() {
 
  textWindow_->backward();
 
  tabWidget_->setCurrentIndex(homeIndex_);
 
  updateButtons();
}
 
void HelpWidget::goHome() {
 
  textWindow_->open(homeSite_);
 
  tabWidget_->setCurrentIndex(homeIndex_);
 
  updateButtons();
}
 
void HelpWidget::updateButtons() {
 
  if(!textWindow_->isBackwardAvailable()) {
          backButton_->setEnabled(false);
  } else {
          backButton_->setEnabled(true);
  }
 
  if(!textWindow_->isForwardAvailable()) {
          forwardButton_->setEnabled(false);
  } else {
          forwardButton_->setEnabled(true);
  }
}
 
void HelpWidget::showSearchWidget() {
 
  searchWidget_->show();
}
 
void HelpWidget::showResults(int /*_hits*/) {
 
  searchWidget_->hide();
 
  int resultsTabIndex_ = tabWidget_->addTab(searchEngine_->resultWidget(), tr("Results") );
  tabWidget_->setCurrentIndex(resultsTabIndex_);
}
 
void HelpWidget::openFoundSite(QListWidgetItem* /*_item*/) {
 
}
 
HelpWidget::~HelpWidget() {
 
  delete searchWidget_;
  delete textWindow_;
}