elidinglabel.cpp

Go to the documentation of this file.

/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/

#include "elidinglabel.h"

#include <QEvent>

namespace LC::Util
{
    ElidingLabel::ElidingLabel (QWidget *parent)
    : QLabel { parent }
    {
        setTextFormat (Qt::PlainText);
    }

    void ElidingLabel::SetFullText (const QString& text)
    {
        if (FullText_ == text)
            return;

        FullText_ = text;
        UpdateElide ();
    }

    QString ElidingLabel::GetFullText () const
    {
        return FullText_;
    }

    void ElidingLabel::SetElideMode (Qt::TextElideMode mode)
    {
        if (ElideMode_ == mode)
            return;

        ElideMode_ = mode;
        UpdateElide ();
    }

    Qt::TextElideMode ElidingLabel::GetElideMode () const
    {
        return ElideMode_;
    }

    QSize ElidingLabel::sizeHint () const
    {
        const auto& cm = contentsMargins ();

        auto result = QLabel::sizeHint ();
        const auto textWidth = fontMetrics ().horizontalAdvance (FullText_) + 1;
        result.setWidth (std::max (result.width (), textWidth + cm.left () + cm.right ()));
        return result;
    }

    void ElidingLabel::changeEvent (QEvent *ev)
    {
        QLabel::changeEvent (ev);
        switch (ev->type ())
        {
        case QEvent::FontChange:
        case QEvent::StyleChange:
        case QEvent::ApplicationFontChange:
        case QEvent::LayoutDirectionChange:
            UpdateElide ();
            break;
        default:
            break;
        }
    }

    void ElidingLabel::resizeEvent (QResizeEvent *ev)
    {
        QLabel::resizeEvent (ev);
        UpdateElide ();
    }

    void ElidingLabel::UpdateElide ()
    {
        const auto& fm = fontMetrics ();

        const auto& elided = fm.elidedText (FullText_, ElideMode_, contentsRect ().width ());
        setText (elided);
    }
}