Also, you could try swapping out the image browser (or making it hidden) when
it is empty, and display an alternative placeholder view in its place.
Also, file a bug report requesting the ability to do this built-in.
On 25 Nov 2009, at 13:44, Thomas Goossens wrote:
> Hi Florian,
>
> You can't do custom drawing this way (because the IKImageBrowserView renders
> into an openGL surface, so AppKit or CoreGraphics calls won't do anything).
> So to do what you want you can either:
> - make the view layer backed and add a sub-layer
> - add an overlay transparent window on top of the image browser view
> - add an overlay layer with setForegroundLayer: (that's the easiest solution
> but it is SnowLeopard only).
>
> -- Thomas
>
>
> On Nov 25, 2009, at 2:34 PM, Florian Soenens wrote:
>
>> Hi list,
>>
>> i'm trying to override an IKImageBrowserView to do some custom drawing but
>> i'm stuck.
>> What i try to accomplish is that when the view contains zero items, some
>> custom drawing happens like drawing an NSAttributedString that says "Drop
>> items here..."
>> Problem is that my drawing code gets never called.
>>
>> Here's the drawRect method of my IKImageBrowserView:
>>
>> - (void)drawRect:(NSRect)rect
>> {
>> [super drawRect:rect];
>>
>> NSUInteger numItems = [[self dataSource]
>> numberOfItemsInImageBrowser:self];
>>
>> if(numItems <= 0)
>> {
>> NSLog(@"No items in me"); // This gets called, so i'm sure the
>> above code works
>>
>> NSRect bounds = [self bounds];
>> bounds.size.width = 200;
>> bounds.size.height = 200;
>> bounds.origin.x += 200;
>> bounds.origin.y += 200;
>>
>> //[NSGraphicsContext saveGraphicsState];
>>
>> [[NSColor yellowColor] set]; // Just for testing purposes
>> NSRectFill(bounds);
>>
>> //[NSGraphicsContext restoreGraphicsState];
>> }
>> }
>>
>> Uncommenting the NSGrahicsContext doesn't help either.
>>
>> Anyone has any ideas or workarounds for this?
>> Thanks in advance,
>> Florian
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