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Override square annotation image view
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| // | ||
| // AnnotationManager.swift | ||
| // Zotero | ||
| // | ||
| // Created by Miltiadis Vasilakis on 25/6/24. | ||
| // Copyright © 2024 Corporation for Digital Scholarship. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
| import PSPDFKit | ||
|
|
||
| class AnnotationManager: PSPDFKit.AnnotationManager { | ||
| override func annotationViewClass(for annotation: Annotation) -> AnyClass? { | ||
| if annotation is SquareAnnotation { | ||
| // Use a custom annotation view subclass for square annotations. | ||
| return SquareAnnotationView.self | ||
| } | ||
| return super.annotationViewClass(for: annotation) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| // | ||
| // SquareAnnotationView.swift | ||
| // Zotero | ||
| // | ||
| // Created by Miltiadis Vasilakis on 25/6/24. | ||
| // Copyright © 2024 Corporation for Digital Scholarship. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
| import PSPDFKitUI | ||
|
|
||
| class SquareAnnotationView: PSPDFKitUI.HostingAnnotationView { | ||
| private var commentImageView: UIImageView? | ||
|
|
||
| override var annotationImageView: UIImageView? { | ||
| commentImageView?.removeFromSuperview() | ||
| commentImageView = nil | ||
| guard let annotationImageView = super.annotationImageView else { | ||
| return nil | ||
| } | ||
| guard let annotation, let comment = annotation.contents, !comment.isEmpty, !annotation.flags.contains(.hidden) else { | ||
| return annotationImageView | ||
| } | ||
| commentImageView = createCommentImageView(in: annotationImageView) | ||
| return annotationImageView | ||
|
|
||
| func createCommentImageView(in annotationImageView: UIImageView) -> UIImageView { | ||
| let width: CGFloat = 12 | ||
| let height: CGFloat = 12 | ||
| let alpha: CGFloat = 0.75 | ||
| let size = CGSize(width: width, height: height) | ||
| let commentImage = UIGraphicsImageRenderer(size: size).image { context in | ||
| CommentIconDrawingController.draw(context: context.cgContext, origin: .zero, size: size, color: annotation.color ?? .black, alpha: alpha) | ||
| } | ||
| let commentImageView = UIImageView() | ||
| commentImageView.image = commentImage | ||
| commentImageView.contentMode = .scaleAspectFit | ||
| annotationImageView.addSubview(commentImageView) | ||
| commentImageView.translatesAutoresizingMaskIntoConstraints = false | ||
| let widthMultiplier = width / annotation.boundingBox.width | ||
| let heightMultiplier = height / annotation.boundingBox.height | ||
| NSLayoutConstraint.activate([ | ||
| commentImageView.widthAnchor.constraint(equalTo: annotationImageView.widthAnchor, multiplier: widthMultiplier), | ||
| commentImageView.heightAnchor.constraint(equalTo: annotationImageView.heightAnchor, multiplier: heightMultiplier), | ||
| commentImageView.centerXAnchor.constraint(equalTo: annotationImageView.leadingAnchor), | ||
| commentImageView.centerYAnchor.constraint(equalTo: annotationImageView.topAnchor) | ||
| ]) | ||
| return commentImageView | ||
| } | ||
| } | ||
| } |