Method SearchEngineLineEdit

src/ui/window/SearchEngineLineEdit.cpp:10–52

#include <QToolButton>

SearchEngineLineEdit::SearchEngineLineEdit(QWidget *parent) :
    QLineEdit(parent)
{
    // Set minimum width and size policy
    setMinimumWidth(parent->width() / 5);

    QSizePolicy policy = sizePolicy();
    setSizePolicy(QSizePolicy::Preferred, policy.verticalPolicy());

    // Setup search button
    m_searchButton = new QToolButton(this);
    m_searchButton->setPopupMode(QToolButton::InstantPopup);
    m_searchButton->setCursor(Qt::ArrowCursor);
    m_searchButton->setToolTip(tr("Choose Search Engine"));
    m_searchButton->setStyleSheet("QToolButton { border: none; padding: 0px; background-position: left center; "
                                  "background-repeat: no-repeat; background-origin: content; background-image: url(\":/search_icon.png\"); }"
                                  "QToolButton::menu-indicator { subcontrol-position: bottom right; subcontrol-origin: content; top: 3px; } ");
    m_searchButton->setFixedWidth(28);

    // Set appearance
    setStyleSheet(QString("QLineEdit { border: 1px solid #919191; border-radius: 2px; padding-left: %1px; margin-right: 3px; }"
                          "QLineEdit:focus { border: 1px solid #6c91ff; }").arg(m_searchButton->sizeHint().width() + 6));
    setPlaceholderText(tr("Search"));

    // Load search engines
    loadSearchEngines();

    // Set behavior of line edit
    connect(this, &SearchEngineLineEdit::returnPressed, [=](){
        QString term = text();
        if (term.isNull() || term.isEmpty())
            return;

        HttpRequest request = SearchEngineManager::instance().getSearchRequest(term, m_currentEngineName);
        emit requestPageLoad(request);
    });

    // Connect search engine manager's signals for search engines being added or removed to appropriate slots
    SearchEngineManager *manager = &SearchEngineManager::instance();
    connect(manager, &SearchEngineManager::defaultEngineChanged, this, &SearchEngineLineEdit::setSearchEngine);
    connect(manager, &SearchEngineManager::engineAdded, this, &SearchEngineLineEdit::addSearchEngine);
    connect(manager, &SearchEngineManager::engineRemoved, this, &SearchEngineLineEdit::removeSearchEngine);
}

void SearchEngineLineEdit::loadSearchEngines()
{