qt-creator/src/plugins/help/centralwidget.cpp

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#include "centralwidget.h"

#include "helpviewer.h"
#include "localhelpmanager.h"
#include "openpagesmanager.h"
#include "topicchooser.h"

#include <utils/qtcassert.h>

#include <QHelpEngine>

using namespace Help::Internal;

CentralWidget *gStaticCentralWidget = 0;

// -- CentralWidget

CentralWidget::CentralWidget(const Core::Context &context, QWidget *parent)
    : HelpWidget(context, HelpWidget::ModeWidget, parent)
{
    QTC_CHECK(!gStaticCentralWidget);
    gStaticCentralWidget = this;
}

CentralWidget::~CentralWidget()
{
    // TODO: this shouldn't be done here
    QString zoomFactors;
    QString currentPages;
    for (int i = 0; i < viewerCount(); ++i) {
        const HelpViewer * const viewer = viewerAt(i);
        const QUrl &source = viewer->source();
        if (source.isValid()) {
            currentPages += source.toString() + QLatin1Char('|');
            zoomFactors += QString::number(viewer->scale()) + QLatin1Char('|');
        }
    }

    QHelpEngineCore *engine = &LocalHelpManager::helpEngine();
    engine->setCustomValue(QLatin1String("LastShownPages"), currentPages);
    engine->setCustomValue(QLatin1String("LastShownPagesZoom"), zoomFactors);
    engine->setCustomValue(QLatin1String("LastTabPage"), currentIndex());
}

CentralWidget *CentralWidget::instance()
{
    Q_ASSERT(gStaticCentralWidget);
    return gStaticCentralWidget;
}

void CentralWidget::open(const QUrl &url, bool newPage)
{
    if (newPage)
        OpenPagesManager::instance().createPage(url);
    else
        setSource(url);
}

void CentralWidget::showTopicChooser(const QMap<QString, QUrl> &links,
    const QString &keyword, bool newPage)
{
    TopicChooser tc(this, keyword, links);
    if (tc.exec() == QDialog::Accepted)
        open(tc.link(), newPage);
}