The couple! How do I add in a line chart can drag two vertical lines, real-time display vertical lin-CodePudding

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The couple! How do I add in a line chart can drag two vertical lines, real-time display vertical lin

Time：10-01

RT, is the need to use the QGraphicsView? thank you

CodePudding user response:

Top up to top up

CodePudding user response:

Top up to top up

CodePudding user response:

You are using qchart or QWT or qcustomplot?
I use qcustomplot made a

CodePudding user response:

I was using a QGraphicsView done, is to join a lineItem as high as the scene