Dragging graphs out of a listbox...

[Mads]

Many years ago I made a demo for myself on how to drag and drop clones of a graph. I wanted to show a transparent picture of the new graph window as soon as the drag started, to give the user immediate feedback of what the drag does and the window to be placed exactly where it is wanted. I think I found inspiration for that on ni.com or here back then, but now I cannot find my old demo, nor the examples that inspired me back then.

Now I have an application where I want to spawn trends of a tag if you drag the tag out of listbox and I had to remake the code...(see video below).

At first I tried to use mouse events to position the window, but I was unable to get a smooth movement that way. I searched the web for similar solutions and found one that used the Input device API to read mouse positions to move a window without a title and that seemed to be much smoother. The first demo I made for myself is attached here (run the demo and drag from the list...). It lacks a way to cancel the drag though; Once you start the drag you have a clone no matter what.

Has anyone else made a similar feature? Perhaps where cancelling is handled too, and/or with a more generic design / framework?

 

 

 

 

Drag window out of listbox - Saved in LV2018.zip

Edited Friday at 01:01 PM by Mads

[ShaunR]

Nice.

If you replace the OpenG VI with the above then we don't need to install all those dependencies for your demo  

What do you expect the cancellation behviour to be? Press escape while holding the mouse down? Mouse up cancels unless the dragged window is outside the main window? Both? Something else?

I wouldn't want this feature to be a "framework" though. It would need to be much easier than that. Maybe a VI that accepts  control references and it just works like above on those controls?

Edited Friday at 10:24 AM by ShaunR

[Mads]

1 hour ago, ShaunR said:

Nice.

If you replace the OpenG VI with the above then we don't need to install all those dependencies for your demo  

What do you expect the cancellation behviour to be? Press escape while holding the mouse down? Mouse up cancels unless the dragged window is outside the main window? Both? Something else?

I wouldn't want this feature to be a "framework" though. It would need to be much easier than that. Maybe a VI that accepts  control references and it just works like above on those controls?

Ah, yes, thanks. The attachment in the original post is now without the OpenG dependency and has been converted back to LabVIEW 2018.