Add backdrop to Canvas or allow Picture in Inspector Behaviour

PaulS

Summary

Sometimes a picture needs to be added to a canvas as background.
This can only be done via code.
It would be nice if a picture can be added via a Backdrop/Background property.
Another way would be creating a picture property myself but than picture needs to be exposed in Inspector Behaviour.

Objo Studio Version

26.6.7

Operating System

Select the operating system(s) affected as tags for this post.

Steps To Reproduce

Expected Result

Actual Result

Screenshots, Logs, Or Sample Project

PaulS

My excuses.
This was supposed to be a suggestion post not a bug post.

Garry

Implemented for the next build: https://feedback.objo.dev/feature/562

Canvas now has two new properties:

Canvas1.Backdrop = Picture.FromAsset("UI/Map", Canvas1.ScaleFactor)
Canvas1.BackdropStretch = ImageStretch.UniformToFill

In the Window Designer, selecting a Canvas now shows:

Backdrop: a dropdown listing the project’s image assets, plus (None)
BackdropStretch: None, Fill, Uniform, or UniformToFill

The backdrop is drawn behind anything produced by the Canvas Paint event, so existing drawing code continues to work as before. The designer also previews the backdrop, layout XML stores it as backdropImageAsset, and generated code loads the image asset automatically at runtime.

If no backdrop is assigned, the render path only does a cheap null/size check and returns immediately. It does not fire extra Paint events or add VM-side drawing overhead.

Canvas.ToPicture() also includes the backdrop now, including the case where the canvas only has a backdrop and no paint commands.