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Clickable QLabel

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Revision as of 14:31, 23 February 2015 by Maintenance script (talk | contribs)
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h1. A 'Click'able QLabel

A "clicked" signal may sometimes be required from a label, but there is no "clicked" signal emitted by QLabel.
You can work around this easily by making a QPushButton like a label by setting the 'flat' property.

However, if there are other properties of a QLabel object that you need, here is a code snippet for a custom QLabel which can emit a signal : 'clicked'.
In other words, a Clickable QLabel!

Header

class ClickableLabel : public QLabel<br />{

Q_OBJECT

public:<br /> explicit ClickableLabel( const QString&amp;amp; text =&quot;&quot;, QWidget * parent = 0 );<br /> ~ClickableLabel();

signals:<br /> void clicked();

protected:<br /> void mousePressEvent ( QMouseEvent * event ) ;<br />};

Source

<br />ClickableLabel::ClickableLabel( const QString&amp;amp; text, QWidget * parent ) :<br /> QLabel(parent)

{<br /> this-&gt;setText(text);<br /> }

ClickableLabel::~ClickableLabel()<br /> {<br /> }

void ClickableLabel::mousePressEvent ( QMouseEvent * event )

{<br /> emit clicked();<br /> }<br />

What we do here is simple : Catch the mouse press event on the label. Then emit 'clicked' signal. We could as well make the signal be emitted when mouse gets released. This is let to be a decision of the developer.