Implemented the culture delete function

I18N Commander/Processor/AppSettings.cs

@@ -385,6 +385,29 @@ public static class AppSettings
     
     #endregion
 
+    #region Delete a culture
+    
+    public static async Task DeleteCulture(int index)
+    {
+        // Get the database:
+        await using var db = ProcessorMeta.ServiceProvider.GetRequiredService<DataContext>();
+        
+        // Check, if the setting is already set:
+        if (await db.Settings.FirstOrDefaultAsync(n => n.Code.StartsWith(SettingNames.CULTURE) && n.IntegerValue == index) is {} existingSetting)
+        {
+            db.Settings.Remove(existingSetting);
+            await db.SaveChangesAsync();
+        }
+        
+        // Update the list of cultures indices:
+        CACHE_CULTURES_INDICES.Remove(index);
+
+        // Update the cache:
+        CACHE_CULTURES.Remove(index);
+    }
+
+    #endregion
+
     #region Get a list of cultures
 
     public readonly record struct CultureInfo(string Code, int Index);

I18N Commander/UI WinForms/Components/Settings.Designer.cs

@@ -35,6 +35,8 @@
             this.panelSettings = new System.Windows.Forms.Panel();
             this.flowLayoutToolbar = new System.Windows.Forms.FlowLayoutPanel();
             this.buttonAddCulture = new System.Windows.Forms.Button();
+            this.buttonDeleteCulture = new System.Windows.Forms.Button();
+            this.contextMenuDelete = new System.Windows.Forms.ContextMenuStrip(this.components);
             this.toolTip = new System.Windows.Forms.ToolTip(this.components);
             this.tableLayout.SuspendLayout();
             this.flowLayoutToolbar.SuspendLayout();
@@ -97,6 +99,7 @@
             // 
             this.tableLayout.SetColumnSpan(this.flowLayoutToolbar, 2);
             this.flowLayoutToolbar.Controls.Add(this.buttonAddCulture);
+            this.flowLayoutToolbar.Controls.Add(this.buttonDeleteCulture);
             this.flowLayoutToolbar.Dock = System.Windows.Forms.DockStyle.Fill;
             this.flowLayoutToolbar.Location = new System.Drawing.Point(0, 315);
             this.flowLayoutToolbar.Margin = new System.Windows.Forms.Padding(0);
@@ -117,6 +120,27 @@
             this.buttonAddCulture.UseVisualStyleBackColor = true;
             this.buttonAddCulture.Click += new System.EventHandler(this.buttonAddCulture_Click);
             // 
+            // buttonDeleteCulture
+            // 
+            this.buttonDeleteCulture.ContextMenuStrip = this.contextMenuDelete;
+            this.buttonDeleteCulture.FlatAppearance.BorderSize = 0;
+            this.buttonDeleteCulture.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.buttonDeleteCulture.Image = global::UI_WinForms.Resources.Icons.icons8_trash_can_512;
+            this.buttonDeleteCulture.Location = new System.Drawing.Point(69, 3);
+            this.buttonDeleteCulture.Name = "buttonDeleteCulture";
+            this.buttonDeleteCulture.Size = new System.Drawing.Size(60, 60);
+            this.buttonDeleteCulture.TabIndex = 0;
+            this.toolTip.SetToolTip(this.buttonDeleteCulture, "Delete a culture");
+            this.buttonDeleteCulture.UseVisualStyleBackColor = true;
+            this.buttonDeleteCulture.Click += new System.EventHandler(this.buttonDeleteCulture_Click);
+            // 
+            // contextMenuDelete
+            // 
+            this.contextMenuDelete.Font = new System.Drawing.Font("Segoe UI", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
+            this.contextMenuDelete.ImageScalingSize = new System.Drawing.Size(20, 20);
+            this.contextMenuDelete.Name = "contextMenuDelete";
+            this.contextMenuDelete.Size = new System.Drawing.Size(211, 32);
+            // 
             // toolTip
             // 
             this.toolTip.AutoPopDelay = 30000;
@@ -149,5 +173,7 @@
         private FlowLayoutPanel flowLayoutToolbar;
         private ToolTip toolTip;
         private Button buttonAddCulture;
+        private Button buttonDeleteCulture;
+        private ContextMenuStrip contextMenuDelete;
     }
 }

I18N Commander/UI WinForms/Components/Settings.cs

@@ -28,4 +28,33 @@ public partial class Settings : UserControl
         // Reload all settings:
         await this.LoadAllSettings();
     }
+
+    private async void buttonDeleteCulture_Click(object sender, EventArgs e)
+    {
+        // Read all cultures:
+        var cultures = await AppSettings.GetCultureInfos();
+        
+        // Populate the delete button's menu strip with all cultures:
+        this.contextMenuDelete.Items.Clear();
+        foreach (var culture in cultures)
+        {
+            var item = new ToolStripMenuItem($"{culture.Index}. Culture: {culture.Code}");
+            item.Tag = culture.Index;
+            item.Click += async (senderObj, args) =>
+            {
+                if (senderObj is not ToolStripMenuItem toolStripMenuItem)
+                    return;
+                
+                // Delete the culture:
+                await AppSettings.DeleteCulture((int)toolStripMenuItem.Tag);
+                    
+                // Reload all settings:
+                await this.LoadAllSettings();
+            };
+            
+            this.contextMenuDelete.Items.Add(item);
+        }
+        
+        this.contextMenuDelete.Show((Button)sender, new Point(0, (this.contextMenuDelete.Height + this.buttonDeleteCulture.Height / 2) * -1));
+    }
 }

I18N Commander/UI WinForms/Components/Settings.resx

@@ -60,4 +60,7 @@
   <metadata name="toolTip.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
     <value>17, 17</value>
   </metadata>
+  <metadata name="contextMenuDelete.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>122, 17</value>
+  </metadata>
 </root>

I18N Commander/UI WinForms/Resources/Icons.Designer.cs

@@ -259,5 +259,15 @@ namespace UI_WinForms.Resources {
                 return ((System.Drawing.Bitmap)(obj));
             }
         }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap icons8_trash_can_512 {
+            get {
+                object obj = ResourceManager.GetObject("icons8_trash_can_512", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
     }
 }

I18N Commander/UI WinForms/Resources/Icons.resx

@@ -178,4 +178,7 @@
   <data name="icons8_settings_svg" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>icons8-settings.svg.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
+  <data name="icons8_trash_can_512" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>icons8-trash-can-512.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
 </root>