Hi, I should draw a graphic in qt designer about a real time process. This graphic represent PID Control. What tools or widgets I should use? Thanks

]]>https://forum.qt.io/topic/27236/draw-a-graphic-in-qt-designerRSS for NodeTue, 21 Apr 2026 06:05:49 GMTTue, 14 May 2013 16:56:01 GMT60Thanks guys! I'll try it. Thanks!

]]>https://forum.qt.io/post/180077https://forum.qt.io/post/180077Wed, 22 May 2013 11:28:09 GMTAlso you can get good performance with "Graphicsview":https://qt-project.org/doc/qt-5.0/qtwidgets/examples-graphicsview.html

]]>https://forum.qt.io/post/179416https://forum.qt.io/post/179416Thu, 16 May 2013 09:35:46 GMTThe class you should search for is QPainter (and everything related to it)...
Have a look at the "Basic drawing example":http://qt-project.org/doc/qt-4.8/painting-basicdrawing.html this will show you how to use QPainter

]]>https://forum.qt.io/post/179411https://forum.qt.io/post/179411Thu, 16 May 2013 08:47:34 GMTSorry guys,
I would like to say that I want to draw a graphic in Cartesian coordinate axis. The graphic will show velocity in my process so every time I need to draw a new point in the graphic. Which tools is better to use? What commands I should search for?

]]>https://forum.qt.io/post/179359https://forum.qt.io/post/179359Wed, 15 May 2013 18:48:42 GMTSince a PID contains three parameters I would recommend three sliders/dials or spinbox. But as qxoz said, it's a bit unclear what you want to achieve. Do you want a real-time graph? Or a way to setup the PID settings real-time? Or both?
Drawing a graph there are some third party tools to use.
For the dials or other widgets you should use the signals changed() to send new settings into your system.
Greetz

]]>https://forum.qt.io/post/179246https://forum.qt.io/post/179246Wed, 15 May 2013 07:44:59 GMTHi jekasores!
Can you explain what you mean by "...draw a graphic in qt designer..."?

]]>https://forum.qt.io/post/179218https://forum.qt.io/post/179218Wed, 15 May 2013 04:40:06 GMT