Add lookup control

2020-03-07 15:46:10 +01:00
parent 027734f862
commit e85f4a1adb
6 changed files with 228 additions and 55 deletions
--- a/EstusShots.Gtk/Controls/LookupSelectionControl.cs
+++ b/EstusShots.Gtk/Controls/LookupSelectionControl.cs
@@ -0,0 +1,114 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Gdk;
+using GLib;
+using Gtk;
+using Key = Gtk.Key;
+using Menu = Gtk.Menu;
+using MenuItem = Gtk.MenuItem;
+using UI = Gtk.Builder.ObjectAttribute;
+
+namespace EstusShots.Gtk.Controls
+{
+    public class LookupSelectionControlOptions<T>
+    {
+        public List<DataColumn> Columns { get; set; }
+        public List<T> SearchSpace { get; set; }
+        public string KeyProperty { get; set; }
+        public string DisplayProperty { get; set; }
+    }
+
+    public class LookupSelectionControl<T> : Box
+    {
+        [UI] private readonly ComboBox _searchBox = null;
+        [UI] private readonly TreeView _selectionTreeView = null;
+        [UI] private readonly Button _addButton = null;
+        private readonly BindableListControl<T> _selectedItemsListControl;
+
+        public string KeyProperty { get; }
+        public string DisplayProperty { get; }
+        public List<T> AllItems { get; }
+        public List<T> SelectedItems { get; set; }
+
+        public LookupSelectionControl(LookupSelectionControlOptions<T> options) :
+            this(options, new Builder("Controls.glade"))
+        {
+        }
+
+        public LookupSelectionControl(LookupSelectionControlOptions<T> options, Builder builder) :
+            base(builder.GetObject("_multiLookupControl").Handle)
+        {
+            builder.Autoconnect(this);
+
+            KeyProperty = options.KeyProperty;
+            DisplayProperty = options.DisplayProperty;
+            AllItems = options.SearchSpace;
+            SelectedItems = new List<T>();
+
+            var completionStore = new ListStore(GType.String, GType.String);
+            BindCompletionList(completionStore);
+
+            _searchBox.Model = completionStore;
+            _searchBox.IdColumn = 0;
+            _searchBox.EntryTextColumn = 1;
+
+            _searchBox.Entry.Completion = new EntryCompletion
+            {
+                Model = completionStore,
+                InlineSelection = true,
+                InlineCompletion = true,
+                TextColumn = 1,
+                PopupCompletion = true
+            };
+
+            // Init the selected items TreeView
+            _selectedItemsListControl = new BindableListControl<T>(options.Columns, KeyProperty, _selectionTreeView)
+            {
+                Items = SelectedItems
+            };
+            _selectionTreeView.CanFocus = false;
+
+            _selectedItemsListControl.RowContextMenuOpened += selection =>
+            {
+                var remove = new MenuItem {Label = "Remove"};
+                remove.Activated += (sender, eventArgs) =>
+                {
+                    SelectedItems.Remove(_selectedItemsListControl.SelectedItem);
+                    _selectedItemsListControl.DataBind();
+                };
+                var menu = new Menu {remove};
+                menu.ShowAll();
+                menu.Popup();
+            };
+
+            _addButton.Clicked += (sender, args) => AddSelectionToTreeView();
+            _searchBox.Entry.Activated += (sender, args) => AddSelectionToTreeView();
+        }
+
+        private void AddSelectionToTreeView()
+        {
+            // FInd item preferably via its ID, try matching the display value as fallback 
+            var item = Guid.TryParse(_searchBox.ActiveId, out var selectedSeason)
+                ? AllItems.FirstOrDefault(x => x.GetPropertyValue(KeyProperty).Equals(selectedSeason))
+                : AllItems.FirstOrDefault(y => y.GetPropertyValue(DisplayProperty).Equals(_searchBox.Entry.Text));
+            if (item == null) return;
+
+            if (!SelectedItems.Contains(item)) SelectedItems.Add(item);
+            _selectedItemsListControl.DataBind();
+            _searchBox.Entry.Text = "";
+        }
+
+        private void BindCompletionList(ListStore store)
+        {
+            foreach (var item in AllItems)
+            {
+                // value of key
+                var keyValue = item.GetType().GetProperty(KeyProperty)?.GetValue(item).ToString();
+                // value for display
+                var displayValue = item.GetType().GetProperty(DisplayProperty)?.GetValue(item);
+                store.AppendValues(keyValue, displayValue);
+            }
+        }
+    }
+}