#44: add '{' and '}' buttons and refactor.

Author: m-tmatma

CreateGUIDVSPlugin/OptionsControl.Designer.cs

@@ -14,7 +14,8 @@ namespace CreateGUIDVSPlugin
     public partial class OptionsControl : UserControl
     {
         private OptionsPageSetting settingOptionsPage;
- 
+        private int insertPos;
+
         public OptionsControl()
         {
             InitializeComponent();
@@ -24,6 +25,9 @@ public OptionsControl()
                 this.comboBoxVariable.Items.Add(variableName.Description);
             }
             this.comboBoxVariable.SelectedIndex = 0;
+
+            this.insertPos = 0;
+            this.textBoxTemplate.LostFocus += new EventHandler(textBoxTemplate_LostFocus);
         }
 
         /// <summary>
@@ -57,28 +61,108 @@ public void SaveSetting(Configuration configuration)
         /// <param name="configuration"></param>
         public void LoadSetting(Configuration configuration)
         {
-            this.textBoxTemplate.Text = configuration.FormatString;
+            SetText(configuration.FormatString);
         }
 
+        /// <summary>
+        /// handler clicking 'Insert' button
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
         private void buttonInsert_Click(object sender, EventArgs e)
         {
             var guidIndex = decimal.ToInt32(this.numericUpDownGUID.Value);
             var keyname = Template.Variables[this.comboBoxVariable.SelectedIndex];
             var variable = (guidIndex > 0 )? keyname.GetVariable(guidIndex) : keyname.GetVariable();
-            var textBox = this.textBoxTemplate;
-            textBox.Text = textBox.Text.Insert(textBox.SelectionStart, variable);
+            InsertText(variable);
         }
 
+        /// <summary>
+        /// handler clicking 'EOL' button
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
         private void buttonInsertLineEnding_Click(object sender, EventArgs e)
         {
-            var textBox = this.textBoxTemplate;
-            textBox.Text = textBox.Text.Insert(textBox.SelectionStart, Environment.NewLine);
+            InsertText(Environment.NewLine);
+        }
+
+        /// <summary>
+        /// handler clicking '{' button
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void buttonLeftBrace_Click(object sender, EventArgs e)
+        {
+            InsertText("{{");
         }
 
+        /// <summary>
+        /// handler clicking '}' button
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void buttonRightBrace_Click(object sender, EventArgs e)
+        {
+            InsertText("}}");
+        }
+
+        /// <summary>
+        /// hander clicking 'Default' button
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
         private void buttonSetDefault_Click(object sender, EventArgs e)
+        {
+            SetText(Template.DefaultFormatString);
+        }
+
+        /// <summary>
+        /// handler that the textbox loses focus
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void textBoxTemplate_LostFocus(object sender, EventArgs e)
+        {
+            TextBox textBox = (TextBox)sender;
+            this.insertPos = textBox.SelectionStart;
+        }
+
+        /// <summary>
+        /// insert a text to the textbox
+        /// </summary>
+        /// <param name="text"></param>
+        private void InsertText(string text)
+        {
+            var textBox = this.textBoxTemplate;
+            textBox.Text = textBox.Text.Insert(this.insertPos, text);
+            this.insertPos += text.Length;
+
+            ScrollToCarect();
+        }
+
+        /// <summary>
+        /// overwrite textbox content
+        /// </summary>
+        /// <param name="text"></param>
+        private void SetText(string text)
+        {
+            var textBox = this.textBoxTemplate;
+            textBox.Text = text;
+            this.insertPos = text.Length;
+
+            ScrollToCarect();
+        }
+
+        /// <summary>
+        /// function to scroll the textbox to the caret position
+        /// </summary>
+        private void ScrollToCarect()
         {
             var textBox = this.textBoxTemplate;
-            textBox.Text = Template.DefaultFormatString;
+            textBox.SelectionStart = this.insertPos;
+            textBox.Focus();
+            textBox.ScrollToCaret();
         }
     }
 }