Elided Labels in Qt

So for one of my projects I was dissatisfied with the fact that a QLabel whose horizontal size policy is Qt::Ignored will have its text clipped instead of having an ellipsis at the end (or somewhere in there). I whipped together a simple extension to QLabel that puts an ellipsis at the end based on the current size of the label. It's not complete in general (e.g., doesn't really support multiple lines), but for me it gets the job done. Feel free to use this code for whatever purpose you please (i.e., it's MIT licensed).

//---------------------------------------------------------------------
//
// Copyright © 2011, Jason Gedge <gedge -at- ualberta -dot- ca>
//
// This file is part of StereoReconstruction.
//
// StereoReconstruction is free software: you can redistribute it and/or
// modify it under the terms of the GNU General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// StereoReconstruction is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with StereoReconstruction. If not, see <http:www.gnu.org/licenses/>.
//
//---------------------------------------------------------------------
#ifndef ELIDEDLABEL_HPP
#define ELIDEDLABEL_HPP

#include <QLabel>

/*!
 * A label that elides its text when not enough geometry is available to show
 * all of the text.
 *
 * \note currently only capable of one-line
 */
class ElidedLabel : public QLabel {
    Q_OBJECT

public:
	ElidedLabel(QWidget *parent = 0, Qt::WindowFlags f = 0);
	ElidedLabel(const QString &txt, QWidget * parent = 0, Qt::WindowFlags f = 0);
    ElidedLabel(const QString &txt,
				Qt::TextElideMode elideMode = Qt::ElideRight,
				QWidget * parent = 0,
				Qt::WindowFlags f = 0);

public:
	//! Set the elide mode used for displaying text.
	void setElideMode(Qt::TextElideMode elideMode) {
		elideMode_ = elideMode;
		updateGeometry();
	}

	//! Get the elide mode currently used to display text.
	Qt::TextElideMode elideMode() const { return elideMode_; }

public: // QLabel overrides
	void setText(const QString &);

protected: // QLabel overrides
	void paintEvent(QPaintEvent *);
	void resizeEvent(QResizeEvent *);

protected:
	//! Cache the elided text so as to not recompute it every paint event
	void cacheElidedText(int w);

private:
    Qt::TextElideMode elideMode_;
	QString cachedElidedText;
};

#endif // ELIDEDLABEL_HPP

//---------------------------------------------------------------------
//
// Copyright © 2011, Jason Gedge <gedge -at- ualberta -dot- ca>
//
// This file is part of StereoReconstruction.
//
// StereoReconstruction is free software: you can redistribute it and/or
// modify it under the terms of the GNU General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// StereoReconstruction is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with StereoReconstruction. If not, see <http:www.gnu.org/licenses/>.
//
//---------------------------------------------------------------------
#include "elidedlabel.hpp"
#include <QPainter>
#include <QResizeEvent>

//---------------------------------------------------------------------

ElidedLabel::ElidedLabel(QWidget *parent, Qt::WindowFlags f)
	: QLabel(parent, f)
	, elideMode_(Qt::ElideRight)
{
	setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
}

ElidedLabel::ElidedLabel(const QString &txt, QWidget *parent, Qt::WindowFlags f)
	: QLabel(txt, parent, f)
	, elideMode_(Qt::ElideRight)
{
	setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
}

ElidedLabel::ElidedLabel(const QString &txt,
						 Qt::TextElideMode elideMode,
						 QWidget *parent,
						 Qt::WindowFlags f)
	: QLabel(txt, parent, f)
	, elideMode_(elideMode)
{
	setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
}

//---------------------------------------------------------------------

void ElidedLabel::setText(const QString &txt) {
	QLabel::setText(txt);
	cacheElidedText(geometry().width());
	setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
}

//---------------------------------------------------------------------

void ElidedLabel::cacheElidedText(int w) {
	cachedElidedText = fontMetrics().elidedText(text(), elideMode_, w, Qt::TextShowMnemonic);
}

//---------------------------------------------------------------------

void ElidedLabel::resizeEvent(QResizeEvent *e) {
	QLabel::resizeEvent(e);
	cacheElidedText(e->size().width());
}

//---------------------------------------------------------------------

void ElidedLabel::paintEvent(QPaintEvent *e) {
	if(elideMode_ == Qt::ElideNone) {
		QLabel::paintEvent(e);
	} else {
		QPainter p(this);
		p.drawText(0, 0,
				   geometry().width(),
				   geometry().height(),
				   alignment(),
				   cachedElidedText);
	}
}

//---------------------------------------------------------------------