Elided Label

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Just call this function and you're good to go.

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

#ifndef ELIDEDLABEL_H
#define ELIDEDLABEL_H

#include <QLabel>

// MIT - Yash : Speedovation.com [ Picked from internet and modified. if owner needs to add or change license do let me know.]

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
    );
    // 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_; }
    // QLabel overrides
    void setText(const QString &);

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

#include "ElidedLabel.h"

#include <QDebug>
#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)
{
}

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

void ElidedLabel::setText(const QString& txt) {
    QLabel::setText(txt);
    cacheElidedText(geometry().width());
}

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
        );
    }
}