The two sizes of the icons when displayed as "normal" and "small" are 32x32 and
24x24. While the recommended way of handling this is to create a multi-image
file as has been described previously, or to use a PDF, I find drawbacks in
both approaches
- multi-image files are normally just the two sizes, and therefore don't have
full support for resolution independence
- if you use a PDF, it has the resolution independence, but will look fuzzy at
non-native resolutions
What I am experimenting with at the moment is using two PDFs that I have
created to be pixel perfect at 32 and 24 pixels, and have created a subclass of
NSToolbar which has the following:
- (void)setSizeMode:(NSToolbarSizeMode)sizeMode {
[super setSizeMode:sizeMode];
if ([self delegate] && [[self delegate]
respondsToSelector:@selector(toolbarSizeModeChanged:)]) {
[[self delegate]
performSelector:@selector(toolbarSizeModeChanged:) withObject:self];
}
}
Then in the toolbar delegate I ask for the sizeMode and from there I can set
the min and max size as necessary, and set the image to the one that is pixel
perfect for that size. I also use the correct sized image in the
itemForIdentifier... method. It seems to be working fine, and means that I have
both a pixel perfect rendering at the required size, and have automatic full
resolution independence.
HTH.
Gideon
On 27/06/2010, at 8:14 AM, Paul Sanders wrote:
> I create my icons as vector graphics without worrying *at all* about pixel
> boundaries and then scale them to fit at display time. Life improved
> markedly when I went this route. Although they might not be as sharp as
> 'pixel-perfect' bitmapped images it means I don't have to worry too much
> about the exact size at which they will be displayed. That said, my talents
> are limited and my icons are pretty boring. The alternative is to create
> 'pixel-perfect' bitmaps in a bitmap editor at the size they will be
> displayed, but it's hard work and I would only do it for a small image where
> display quality is paramount.
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