flutter - Making an Image widget disabled / grayed out

Question

I have a bunch of Image widgets which when in a disabled state, should look grayed out.

Is there a way to alter an existing image make it look disabled / grayed out?

I want to avoid having both an enabled image asset and a disabled image asset increasing the overall APK size instead of having the single asset.

Answer 1

Set the widget as the child of a container, and add foregroundDecoration like this:

Container(
  foregroundDecoration: BoxDecoration(
    color: Colors.grey,
    backgroundBlendMode: BlendMode.saturation,
  ),
  child: child,
)

-- Update: Based on this new video from flutter team, there is another widget for this. The code is basically the same, and it is like this:

ColorFiltered(
  colorFilter: ColorFilter.mode(
    Colors.grey,
    BlendMode.saturation,
  ),
  child: child,
)

But I still prefer the method using Container forgroundDecoration, since container gives you more flexibilities in the same place.