Re: NSScrollView custom thumbs
Re: NSScrollView custom thumbs
- Subject: Re: NSScrollView custom thumbs
- From: Milton Sagen <email@hidden>
- Date: Mon, 18 Dec 2006 16:28:44 -0800
I found that doing just that wasn't enough at least if the
NSScrollView comes from a nib. Simply calling setVerticalScroller or
setHorizontalScroller with an instance of my scroller when the
NSScrollView was created via a nib resulted in scrollbars that didn't
draw or behave correctly. Instead I subclassed NSScrollView, in
addition to subclassing NSScroller, and implemented initWithCoder:
method in my NSScrollView subclass as
- (id) initWithCoder: (NSCoder *) decoder
{
BOOL useSetClass = NO;
BOOL useDecodeClassName = NO;
if ( [decoder respondsToSelector: @selector
(setClass:forClassName:)] ) {
useSetClass = YES;
[(NSKeyedUnarchiver *) decoder setClass: [MyScroller class]
forClassName: @"NSScroller"];
}
else if ( [decoder respondsToSelector: @selector
(decodeClassName:asClassName:)] ) {
useDecodeClassName = YES;
[(NSUnarchiver *) decoder decodeClassName: @"NSScroller"
asClassName: @"MyScroller"];
}
self = [super initWithCoder: decoder];
if ( useSetClass ) {
[(NSKeyedUnarchiver *) decoder setClass: [NSScroller class]
forClassName: @"NSScroller"];
}
else if ( useDecodeClassName ) {
[(NSUnarchiver *) decoder decodeClassName: @"NSScroller"
asClassName: @"NSScroller"];
}
return self;
}
Note: this code assumes nothing has already replaced NSScroller.
BTW: I also found that drawParts for my scroller subclass never got
called.
Milt
On Dec 17, 2006, at 09:16, I. Savant wrote:
You'll need to subclass NSScroller and override -drawKnobs -
drawParts and -drawArrow:highlight: (along with their supporting
methods) and draw your own stuff.
--
I.S.
On Dec 17, 2006, at 11:32 AM, Lorenzo wrote:
Hi,
I would like to customize the thumbs of a NSScrollView and put e.g.
something like the iTunes' thumbs.
I suppose there should be 3 images to compose a thumb.
How to change those images?
Best Regards
--
Lorenzo
email: email@hidden
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