Why are my images in my NSTableView faded out?

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Why are my images in my NSTableView faded out?

To start, there's an NSArrayController ("Servers") whose content is an array of "server" objects.

I also have an NSTableView with a column. The column is bound to Server's "arrangedObjects.status" property.

I use a custom NSValueConverter to make that status into an image for the column's dataCell which is an NSImageCell.

What I don't understand is why the images that show up in the column are correct, but consistently faded out. Just to test, I have the same image outside the table view for comparison and it draws fine. The colors in the images are not semi-transparent.

Does the NSImageCell draw the images as faded? Is there something I can configure in IB that will draw them fully saturated?

+1 A:

You might have the image view cell or column's "enabled" property set to NO (or unchecked in IB). I believe this fades the displayed image.

Joshua Nozzi 2009-12-30 12:22:37

Hmmm... The "enabled" property for the image cell is definitely checked as is the "enabled" property for the table itself. There is no enabled property for the table columns. The enabled properties are not bound to anything as well.But, by doing a pixel comparison, the images definitely are drawing as if they were disabled.

Michael Bishop 2009-12-31 05:43:59

Pure guess: it could be the use of the value converter (NSImageViewCell could be forcibly disabled by the bindings mechanism if it doesn't know how to "set" a new image). You should be able to provide it with the raw data of the image without any conversion.

Joshua Nozzi 2009-12-31 16:19:50

Figured it out. This seems really weird to me, but setting the NSImageCell's border attribute to "None" means that it draws the image translucently. Why it does this, I have no idea.

Michael Bishop 2009-12-31 20:53:16

Now I think it has something to do with bindings. I can drag an image in just fine and that has no border. When I then take that image instance and bind it, it suddenly turns translucent.

Michael Bishop 2009-12-31 21:02:29

From Jim Correia on Cocoa-Dev:

"On 10.6, NSImageView will draw its content as dimmed when the control is disabled.

Your binding has “Conditionally Sets Enabled” turned on."

Michael Bishop 2010-01-23 19:05:31

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Why are my images in my NSTableView faded out?

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