dictionarystar/src/qwebviewselectionsuppressor.h

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#ifndef QWEBVIEWSELECTIONSUPPRESSOR_H
#define QWEBVIEWSELECTIONSUPPRESSOR_H

#include <QtWebKit/qwebview.h>
#include <QtGui/qevent.h>

class QWebViewSelectionSuppressor : public QObject
{
    Q_OBJECT
public:
    QWebViewSelectionSuppressor(QWebView *v)
        : QObject(v), view(v), enabled(false), mousePressed(false)
    {
        Q_ASSERT(view);
        enable();
    }

    inline void enable()
    {
        if (enabled)
            return;
        view->installEventFilter(this);
        enabled = true;
    }

    inline void disable()
    {
        if (!enabled)
            return;
        view->removeEventFilter(this);
        enabled = false;
    }

    inline bool isEnabled() const
    {
        return enabled;
    }

protected:
    inline bool eventFilter(QObject *, QEvent *e);

private:
    QWebView *view;
    bool enabled;
    bool mousePressed;
};

bool QWebViewSelectionSuppressor::eventFilter(QObject *, QEvent *e)
{
    switch (e->type()) {
    case QEvent::MouseButtonPress:
        if (static_cast<QMouseEvent *>(e)->button() == Qt::LeftButton)
            mousePressed = true;
        break;
    case QEvent::MouseButtonRelease:
        if (static_cast<QMouseEvent *>(e)->button() == Qt::LeftButton)
            mousePressed = false;
        break;
    case QEvent::MouseMove:
        if (mousePressed)
            return true;
        break;
    default:
        break;
    }
    return false;
}

#endif