71 lines
2.8 KiB
Swift
71 lines
2.8 KiB
Swift
//
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// Copyright (c) 2019 Touch Instinct
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the Software), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import UIKit
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open class QRCodeOverlayView: UIView {
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public weak var focusView: QRCodeFocusView?
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override open func draw(_ rect: CGRect) {
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guard let focusView = focusView else {
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return
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}
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let cutoutShape = convert(focusView.frame, from: focusView)
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let cornerOffset = focusView.cornerThickness
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let cornerRectSideLength = focusView.cornerLength + focusView.cornerThickness
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let cornerSize = CGSize(width: cornerRectSideLength,
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height: cornerRectSideLength)
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focusView.cornerColor.setFill()
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drawCornerRect(with: cornerSize,
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xOffset: cutoutShape.minX - cornerOffset,
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yOffset: cutoutShape.minY - cornerOffset)
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drawCornerRect(with: cornerSize,
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xOffset: cutoutShape.maxX - cornerRectSideLength + cornerOffset,
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yOffset: cutoutShape.minY - cornerOffset)
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drawCornerRect(with: cornerSize,
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xOffset: cutoutShape.minX - cornerOffset,
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yOffset: cutoutShape.maxY - cornerRectSideLength + cornerOffset)
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drawCornerRect(with: cornerSize,
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xOffset: cutoutShape.maxX - cornerRectSideLength + cornerOffset,
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yOffset: cutoutShape.maxY - cornerRectSideLength + cornerOffset)
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UIGraphicsGetCurrentContext()?.clear(cutoutShape)
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}
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// MARK: - Helpers
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private func drawCornerRect(with size: CGSize, xOffset: CGFloat, yOffset: CGFloat) {
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let cornerRect = CGRect(origin: CGPoint(x: xOffset, y: yOffset), size: size)
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let cornerPath = UIBezierPath(rect: cornerRect)
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cornerPath.fill()
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}
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}
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