Hide or crop overlapping text in QLabel?

Question

I\'m currently building a UI where I do have 3 labels that are arranged in a horizontal layout:

| textLabel                    | valueLabel | unitLabel |
         


        

Answer 1

Widgets in a layout are always managed not to overlap, so I just see no way that the textLabel could overlap valueLabel. Most likely your widgets are not managed by the layout, even if they were added to the layout. Perhaps the layout with labels is not a child of another layout, or is not set on a container widget.

You're not telling us something. A self-contained test case would be good to have.

If you want a label to elide the text by finishing it with "..." instead of abruptly cutting it off, the following elided style can be used.

// Usage:
/*
   QApplication app;
   app.setStyle(new ElidedStyle);
   ...
   QWidget * w = new QLabel("Hello World!");
   w->setProperty("elidedItemText", true); 
*/

// Interface

class ElidedStyle : public QProxyStyle
{
public:
   static QString elidedText(const QString & text, QPainter * painter, const QRect & rect);
   virtual void drawItemText(
      QPainter * painter, const QRect & rect, int flags, const QPalette & pal, 
      bool enabled, const QString & text, QPalette::ColorRole textRole = QPalette::NoRole) const Q_DECL_OVERRIDE;
};

// Implementation

QString ElidedStyle::elidedText(const QString & text, QPainter * painter, const QRect & rect)
{
   QWidget * widget = dynamic_cast<QWidget*>(painter->device());
   if (widget && widget->property("elidedItemText").toBool()) {
      QFontMetrics fm(painter->font());
      return fm.elidedText(text, Qt::ElideMiddle, rect.width());
   }
   return text;
}

void ElidedStyle::drawItemText(
   QPainter * painter, const QRect & rect, int flags, const QPalette & pal,
   bool enabled, const QString & text, QPalette::ColorRole textRole) const
{
   QProxyStyle::drawItemText(painter, rect, flags, pal, enabled, elidedText(text, painter, rect), textRole);
}