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What are the differences between group and layer in KineticJs

I am developing a HTML5 web application using KineticJS. I read that in KineticJS there are grouping and layering. As far as I know there are no differences between them. Can you tell me the differences?

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Hussein Amb Avatar asked Dec 16 '22 08:12

Hussein Amb


1 Answers

The basic difference: Groups are containers while Layers are separators.

Group:

  • A group is a container for shaped objects inside a layer.
  • For example, a group might contain both a circle and a rectangle.
  • A group can be manipulated and all elements within that group are similarly manipulated.
  • For example, dragging a group will simultaneously drag a circle and rectangle contained in that group.

Layer:

  • Layers are actually separate canvas elements that are stacked atop each other.
  • This is similar to the way layers work in Photoshop and Illustrator.
  • Multiple layers are visible simultaneously.
  • If objects from different layers overlap, the topmost object displays fully (like z-indexing).

Groups are used to contain multiple items so they can be manipulated as a group--like putting circles and lines into a group to create a "stickman". Moving the group will move all the pieces of the stickman.

Layers are used to separate different items--like having a background layer that doesn't change and a top layer where animation is occurring.

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markE Avatar answered Dec 17 '22 21:12

markE