init

2025-09-07 14:57:10 +02:00
commit 7770ce1ae3
27 changed files with 1046 additions and 0 deletions
--- a/scripts/FormBinder.cs
+++ b/scripts/FormBinder.cs
@@ -0,0 +1,88 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Reflection;
+using Godot;
+
+public sealed class FormBinder<TViewModel> where TViewModel : INotifyPropertyChanged
+{
+    private readonly TViewModel _vm;
+    private readonly Control _root;
+    private readonly Dictionary<LineEdit, PropertyInfo> _lineToProp = new();
+    private readonly Dictionary<string, LineEdit> _propNameToLine = new(StringComparer.OrdinalIgnoreCase);
+    private bool _suppress;
+
+    public FormBinder(TViewModel vm, Control root)
+    {
+        _vm = vm;
+        _root = root;
+    }
+
+    public FormBinder<TViewModel> Bind()
+    {
+        Discover();
+        _vm.PropertyChanged += OnPropertyChanged;
+        foreach (var (line, prop) in _lineToProp)
+        {
+            line.TextChanged += (string text) =>
+            {
+                if (_suppress) return;
+                if (prop.PropertyType == typeof(string) || prop.PropertyType == typeof(string))
+                    prop.SetValue(_vm, text);
+            };
+        }
+        // Initial sync UI <- VM
+        PushAllFromVm();
+        return this;
+    }
+
+    private void Discover()
+    {
+        var props = typeof(TViewModel).GetProperties(BindingFlags.Instance | BindingFlags.Public);
+        var propMap = new Dictionary<string, PropertyInfo>(StringComparer.OrdinalIgnoreCase);
+        foreach (var p in props) if (p.CanRead || p.CanWrite) propMap[p.Name] = p;
+
+        void Walk(Node n)
+        {
+            if (n is LineEdit le)
+            {
+                // Prefer explicit metadata "vm_prop" to map to a property name; fallback to node name.
+                string propName = le.HasMeta("vm_prop") ? (string)le.GetMeta("vm_prop") : StripSuffix(le.Name, "LineEdit");
+                if (propMap.TryGetValue(propName, out var pi))
+                {
+                    _lineToProp[le] = pi;
+                    _propNameToLine[propName] = le;
+                }
+            }
+            foreach (var c in n.GetChildren())
+                if (c is Node child) Walk(child);
+        }
+
+        Walk(_root);
+    }
+
+    private static string StripSuffix(string s, string suffix) =>
+        s.EndsWith(suffix, StringComparison.Ordinal) ? s[..^suffix.Length] : s;
+
+    private void OnPropertyChanged(object? sender, PropertyChangedEventArgs e)
+    {
+        if (e.PropertyName == null) return;
+        if (_propNameToLine.TryGetValue(e.PropertyName, out var le))
+        {
+            _suppress = true;
+            try { le.Text = _lineToProp[le].GetValue(_vm)?.ToString() ?? string.Empty; }
+            finally { _suppress = false; }
+        }
+    }
+
+    public void PushAllFromVm()
+    {
+        _suppress = true;
+        try
+        {
+            foreach (var (line, prop) in _lineToProp)
+                line.Text = prop.GetValue(_vm)?.ToString() ?? string.Empty;
+        }
+        finally { _suppress = false; }
+    }
+}