Re: [pyqtgraph] Modifying mouse click and drag events in ImageItem - signals.connect versus functions

Regarding the use of scene events: you just need to map the position of the event to the coordinate system of your ImageItem, like: image_pos = image_item.mapFromScene(event.scenePos()) If this makes no sense at all, then I recommend reading about Qt GraphicsView and how it handles

Re: [pyqtgraph] Scrolling Plots - Real Time Plot Updates How To?

Thank you for responding. I am a noob to pyqtgraph. The capture rate will match the frame rate and processing. So, I expect there to be 25-30 (frame rate) values per second. Its a very simple python app. I do not think I even need date/time variable on the second (x) axis - maybe a nice to

[pyqtgraph] Re: Scrolling Plots - Real Time Plot Updates How To?

Thank you for responding. The capture rate will match the frame rate and processing. So, I expect there to be 25-30 (frame rate) values per second. Its a very simple python app. I do not think I even need to date/time variable on the second (x) axis - maybe a nice to have. I just want to show

Re: [pyqtgraph] Scrolling Plots - Real Time Plot Updates How To?

My suggestion would have been to look at the scrolling plot examples, but you have already done that. Have you tried using any of those? If so, why didn't they work for you? On Wed, May 16, 2018, 23:39 Kaisar Khatak wrote: > I have a real time application that uses a

[pyqtgraph] Modifying mouse click and drag events in ImageItem - signals.connect versus functions

Hi all, I'm trying to write some code that will allow me to paint on an image in different colors and I'm very confused about how to go about it. ImageItem does implement a small drawing example but as I want to extend the functionality further the ImageItem-draw example script has been of

[pyqtgraph] Re: Scrolling Plots - Real Time Plot Updates How To?

I think threading would complicate things *a lot.* What is the rate of data acquisition (values per second)? I am able to simulate a few hundred particles bouncing around on a region of the plane at 25 fps, with no threading. So if you don't need to do any complicated processing on your data,

[pyqtgraph] Scrolling Plots - Real Time Plot Updates How To?

I have a real time application that uses a camera to measure eye aspect ratio. The ratio will be an integer value and will fluctuate between 1-10 (example). What is the easiest way to capture that value and display a scrolling plot (best approach?) real time? Do I need threading? Just looking