CODEWITHSUNDEEP
cocoazooming
Ganesh Nayak
Ganesh Nayak

Reputation: 798

Image Zoom-In Zoom-Out in NSImageView

Can anyone please suggest me a good sample code for zooming image in NSImageView. Thanks.

Upvotes: 6

Views: 5005

Answers (5)

silverdr
silverdr

Reputation: 2172

Unless I misunderstand what you mean by "zooming image" - this seems to be pretty easy. Take the view's frame and scale it at will (although adding limits is obviously highly advisable), while having the image scaling type set to NSImageScaleProportionallyUpOrDown:

NSRect newFrame = NSMakeRect(newOriginX, newOriginY, newSizeWidth, newSizeHeight);
[myNSImageView setFrame:newFrame];

Upvotes: 0

Taiwosam
Taiwosam

Reputation: 549

You can embed your image view in an NSScrollView. Prepare your scroll view like this:

private var scrollView: NSScrollView = {
    let view = NSScrollView()
    view.allowsMagnification = true
    view.minMagnification = 1
    view.maxMagnification = 5
    return view
}()

and set its documentView to your image view:

scrollView.documentView = myImageView

Upvotes: 2

Reed Olsen
Reed Olsen

Reputation: 9169

Perhaps you want to try using ImageKit's IKImageView instead. This gives you zooming, rotation, etc...all for free.

Upvotes: 2

Peter Hosey
Peter Hosey

Reputation: 96333

If you look at the documentation, you'll see that NSImageView doesn't support this. Use Image Kit instead.

Upvotes: 3

rnovak1988
rnovak1988

Reputation: 177

While technically NSImageView doesn't technically support this, it is possible. I believe by changing the bounds of the NSView that you're using, and make sure that the image is set to "Proportionally Down", or "Proportionally Up or Down".

This code seems to work for me, on OSX 10.9 (Mavericks)

   NSSize size = [_imageView bounds].size;

   NSSize newSize = NSMakeSize(size.width * 0.90, size.height * 0.90);

   [_imageView setBoundsSize: newSize];

I have also had success "embedding" an image view inside a scroll view, and then using magnification on the scroll view. YMMV

Upvotes: 2

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