https://sourceforge.net/p/qwt/bugs/386/2025-07-18T08:36:58.885000ZRecent changes to 386: QwtPicker trackerPosition2025-07-18T08:36:58.885000Z2025-07-18T08:36:58.885000ZAnonymoushttps://sourceforge.net/u/userid-None/https://sourceforge.net9ab01c0ecaca5a778e4a17e43ba1f90af77d8cbd

<div class="markdown_content"><p>Hi,<br/> There appears to be a minor bug in <code>QwtPicker</code> when the tracker is enabled. The tracker position is only updated in <code>QwtPicker::widgetMouseMoveEvent</code>, but not in <code>QwtPicker::widgetMousePressEvent</code>. As a result, the tracker can sometimes appear in the wrong location with incorrect coordinates.<br/> To reproduce the issue:<br/> 1. Set up a plot with both a picker and a zoomer.<br/> 2. Click anywhere to activate the picker's tracker.<br/> 3. Zoom the plot.<br/> 4. Click again (without moving the mouse) to activate the picker's tracker.<br/> In this case, the tracker will appear at the "previous" position instead of the new one.<br/> Note: The tracker position is also updated in <code>QwtPicker::begin()</code>, but only if the tracker position hasn’t been initialized yet.</p></div>