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// |
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// ChargedDeviceQRCodeView.swift |
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// USB Meter |
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// |
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// Created by Codex on 10/04/2026. |
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// |
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import CoreImage.CIFilterBuiltins |
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import SwiftUI |
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struct ChargedDeviceQRCodeView: View {
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let qrIdentifier: String |
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let side: CGFloat |
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private let context = CIContext() |
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private let filter = CIFilter.qrCodeGenerator() |
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var body: some View {
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Group {
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if let image = qrImage {
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Image(uiImage: image) |
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.interpolation(.none) |
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.resizable() |
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.scaledToFit() |
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} else {
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RoundedRectangle(cornerRadius: 14) |
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.fill(Color.secondary.opacity(0.12)) |
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.overlay( |
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Image(systemName: "qrcode") |
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.font(.system(size: side * 0.34, weight: .semibold)) |
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.foregroundColor(.secondary) |
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) |
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} |
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} |
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.frame(width: side, height: side) |
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.padding(8) |
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.background( |
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RoundedRectangle(cornerRadius: 18) |
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.fill(Color.white.opacity(0.92)) |
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) |
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} |
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private var qrImage: UIImage? {
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filter.setValue(Data(qrIdentifier.utf8), forKey: "inputMessage") |
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filter.correctionLevel = "M" |
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guard let outputImage = filter.outputImage else {
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return nil |
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} |
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let transform = CGAffineTransform(scaleX: 12, y: 12) |
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let scaledImage = outputImage.transformed(by: transform) |
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guard let cgImage = context.createCGImage(scaledImage, from: scaledImage.extent) else {
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return nil |
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} |
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return UIImage(cgImage: cgImage) |
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} |
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} |