c++ - Tooltip-like squares on a QCustomPlot widget -


i using qcustomplot in qt creator. haven't specified tooltips widget or anything. when hold down cursor on plot without moving, empty tooltip-like thing appears. wondering how turn off. appreciate hint in matter.

enter image description here

thanks guys, in mainwindow.ui file had remove part of code (it auto generated):

<property name="tooltip">    <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;&lt;br/&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string> </property>

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