Color picker cursor does not display in the correct position

[wongnam]

What are the steps to reproduce?

Sorry, I update again. Color picker cursor does not display in the correct position where i pointed to.

ignore this -> Color picker cannot chose the color in inner of color circle.

What do you expect to happen?

It display in the correct position where i pointed to.

Please tell us about your environment:

• Node-RED-Dashboard version: 2.15.2
• Node-RED version: 0.20.4
• node.js version: v8.12.0
• npm version: 6.9.0
• Platform/OS: Raspberry Pi 3B+ / Raspbian Stretch
• Browser: MS Edge, Google Chrome

Screen shot:

[dceejay]

the value you get is where you clicked - it's just the cursor shown position that is wrong. We did patch the picker for some reason I can no longer recall... (Indeed was something to do with LED lights but.... I think it was so that you could change from a colour to white (or black) within the single dial - without it the colour wheel just set the saturation andyou then had to set the brightness separately.

Basically it's a 3d problem - and which 2 dimensions you represent on the 2d wheel.

In meantime I have also added an option for the square version of the widget which makes things like greyscale easier to create.

[dceejay]

My current thinking is to try to replace the rgb wheel with a version that is white in centre and dark at the edges - so full colour would be 50% in from edge - that way we can get from white to black and full colours...

[wongnam]

Yes, when it is selected, it will still be valid. It's just a pointer that isn't in the right place.
The way the current color picker works is fine, but it is nice to have a square version. The best is to have 2 types of pickers, to have an option for the user.

[wongnam]

when moved the lightness slider to different level that the cursor does not move to the corresponding position on the color wheel.