From 5c0adf2d72a52dbc5f8d4a4ffc349a36c9455936 Mon Sep 17 00:00:00 2001
From: Richard Fine <rfine@tbrf.net>
Date: Sun, 28 Jan 2024 22:59:16 -0500
Subject: [PATCH 1/2] Add QRCodeDisplay UIToolkit control

---
 QRCoder.Unity/QRCodeDisplay.cs | 115 +++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 QRCoder.Unity/QRCodeDisplay.cs

diff --git a/QRCoder.Unity/QRCodeDisplay.cs b/QRCoder.Unity/QRCodeDisplay.cs
new file mode 100644
index 0000000..26c3097
--- /dev/null
+++ b/QRCoder.Unity/QRCodeDisplay.cs
@@ -0,0 +1,115 @@
+#if ENABLE_UIELEMENTS_CONTROLS
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace QRCoder.Unity
+{
+    public class QRCodeDisplay : VisualElement
+    {
+        public QRCodeDisplay()
+        {
+            value = null;
+            style.unityBackgroundScaleMode = ScaleMode.ScaleToFit;
+        }
+
+        public void Update(string value, QRCodeGenerator.ECCLevel eccLevel, int pixelsPerModule)
+        {
+            _value = value;
+            _eccLevel = eccLevel;
+            _pixelsPerModule = pixelsPerModule;
+            RegenerateImage();
+        }
+
+        public QRCodeGenerator.ECCLevel eccLevel
+        {
+            get => _eccLevel;
+            set
+            {
+                if (_eccLevel == value)
+                    return;
+                _eccLevel = value;
+                RegenerateImage();
+            }
+        }
+
+        public int pixelsPerModule
+        {
+            get => _pixelsPerModule;
+            set
+            {
+                if (_pixelsPerModule == value)
+                    return;
+                _pixelsPerModule = value;
+                RegenerateImage();
+            }
+        }
+
+        private string _value;
+        private Texture2D _image;
+        private QRCodeGenerator.ECCLevel _eccLevel = QRCodeGenerator.ECCLevel.Q;
+        private int _pixelsPerModule = 8;
+
+        public string value
+        {
+            get => _value;
+            set
+            {
+                if (_value == value)
+                    return;
+                _value = value;
+                RegenerateImage();
+            }
+        }
+
+        private void RegenerateImage()
+        {
+            if (_image != null)
+                Object.DestroyImmediate(_image, true);
+
+            _image = null;
+
+            if (value == null)
+                return;
+
+            using var generator = new QRCodeGenerator();
+            using var data = generator.CreateQrCode(value, eccLevel);
+            var unityCode = new UnityQRCode(data);
+            _image = unityCode.GetGraphic(pixelsPerModule);
+            _image.name = "Generated QR code";
+
+            style.backgroundImage = _image;
+        }
+
+        public new class UxmlFactory : UxmlFactory<QRCodeDisplay, UxmlTraits>
+        {
+        }
+
+        public new class UxmlTraits : VisualElement.UxmlTraits
+        {
+            private UxmlStringAttributeDescription m_Value = new() { name = "value" };
+
+            private UxmlEnumAttributeDescription<QRCodeGenerator.ECCLevel> m_ECCLevel = new()
+                { name = "ecc-level", defaultValue = QRCodeGenerator.ECCLevel.Q };
+
+            private UxmlIntAttributeDescription m_PixelsPerModule = new()
+                { name = "pixels-per-module", defaultValue = 8 };
+
+            public override IEnumerable<UxmlChildElementDescription> uxmlChildElementsDescription
+            {
+                get { yield break; }
+            }
+
+            public override void Init(VisualElement ve, IUxmlAttributes bag, CreationContext cc)
+            {
+                base.Init(ve, bag, cc);
+
+                var qr = (QRCodeDisplay)ve;
+                qr.Update(m_Value.GetValueFromBag(bag, cc),
+                    m_ECCLevel.GetValueFromBag(bag, cc),
+                    m_PixelsPerModule.GetValueFromBag(bag, cc));
+            }
+        }
+    }
+}
+#endif
\ No newline at end of file

From 48f7144c289976cd5d132dbd667ce1302d164346 Mon Sep 17 00:00:00 2001
From: Richard Fine <rfine@tbrf.net>
Date: Sun, 28 Jan 2024 23:00:33 -0500
Subject: [PATCH 2/2] Remove #ifdefs

---
 QRCoder.Unity/QRCodeDisplay.cs | 2 --
 1 file changed, 2 deletions(-)

diff --git a/QRCoder.Unity/QRCodeDisplay.cs b/QRCoder.Unity/QRCodeDisplay.cs
index 26c3097..97ea152 100644
--- a/QRCoder.Unity/QRCodeDisplay.cs
+++ b/QRCoder.Unity/QRCodeDisplay.cs
@@ -1,4 +1,3 @@
-#if ENABLE_UIELEMENTS_CONTROLS
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UIElements;
@@ -112,4 +111,3 @@ public override void Init(VisualElement ve, IUxmlAttributes bag, CreationContext
         }
     }
 }
-#endif
\ No newline at end of file