HI Nick,
In my app, I have two IKImageBrowserView subclasses (thumbnailsBrowser) that I
populate with the pictures I need. It supports scrolling out of the box with
the mouse or trackpad when needed. For one of my subclass, I resize the popover
because it can only have up to 5 pictures in it, so I in fact disable
scrolling. The other one however, can have up to 50 images, so to also allow
scrolling with clicking a button, I wired two NSButton to this method:
- (IBAction)coverBrowserGo:(id)sender
{
NSIndexSet *currentlyVisible = [thumbnailsBrowser visibleItemIndexes];
if(debugging)
NSLog(@"current IndexSet: %@", currentlyVisible);
if ([sender tag] == 0) //Go Left
{
// Are we already showing the first item?
if ([currentlyVisible firstIndex]==0)
return;
[thumbnailsBrowser scrollIndexToVisible:[currentlyVisible firstIndex]
-1];
}
else //Go Right
{
if(debugging)
{
NSLog(@"resultMatchArray: %lu", [resultMatchArray count]);
NSLog(@"lastIndex: %lu", [currentlyVisible lastIndex]);
}
// Are we already showing the last item?
if ([currentlyVisible lastIndex]+1==[resultMatchArray count])
return;
[thumbnailsBrowser scrollIndexToVisible:[currentlyVisible lastIndex]
+1];
}
}
To support clicking on an image, I have two choices. In one case I add the
IKImageBrowserController delegate method, where I can then get the index of the
currently selected index for aBrowser:
- (void) imageBrowserSelectionDidChange:(IKImageBrowserView *)aBrowser;
In the other case, I subclass the mouseUp method in my IKImageBrowserView
subclass, then pass data back to the delegate:
- (void) mouseUp:(NSEvent*)inEvent
{
id delegate = self.delegate;
if (delegate)
{
NSPoint mouse = [self convertPoint:[inEvent locationInWindow]
fromView:nil];
NSInteger objectIndex = [self indexOfItemAtPoint: mouse];
if (objectIndex == NSNotFound)
[delegate toggleCoverFloatingWindow:nil];
else
[delegate displayCoverFloatingWindow: objectIndex];
}
[super mouseUp:inEvent];
}
Hope that helps,
Olivier./.
Molowa.
On Dec 21, 2011, at 10:22 AM, Nick wrote:
> I am not sure how to do this.
> Currently, I have an NSScrollView (whose document view has all the
> item views), with hidden scroll bars, and buttons "next" and
> "previous". When "next" and "prev" are clicked, I -scrollToPoint
> NSScrollView's content view a bit to the right or to the left.
> It seems to be working as I need, except that it doesn't scroll
> smoothly (I guess I need to use somehow). I suppose I need to attach a
> core animation layer to NSScrollView? Or use somehow CAScrollView?
> I've never worked with Core Animation before, except using animator
> "proxy", however
> [[[[myscrollview] contentView] animator] scrollToPoint:nextPoint];
> doesn't add any animation..
> What would be the quickest way to make it work?
>
> 2011/12/21 Vincent Habchi <vi...@macports.org>:
>>> And then, I do not have much space on the window to put this
>>> coverflow (while a strip can be small and still look good), plus a
>>> strip can display more than 1 item at once, and the user can click on
>>> any of these items without too much of scrolling).
>>
>> Why don’t you use CALayers (more specifically a CATileLayer and sublayers
>> containing your images)?
>>
>> Vincent
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