CTextBox: Keep size between postbacks when resized.

VAR.Focus.Web/Controls/CTextBox.cs

@@ -1,13 +1,20 @@
 using System;
+using System.Collections.Generic;
+using System.Text;
 using System.Web.UI;
 using System.Web.UI.WebControls;
+using VAR.Json;
 
 namespace VAR.Focus.Web.Controls
 {
-    public class CTextBox : TextBox, IValidableControl
+    public class CTextBox : Control, INamingContainer, IValidableControl
     {
         #region Declarations
 
+        private TextBox _txtContent = new TextBox();
+
+        private HiddenField _hidSize = null;
+
         private const string CssClassBase = "textbox";
         private string _cssClassExtra = "";
 
@@ -19,6 +26,8 @@ namespace VAR.Focus.Web.Controls
 
         private Control _nextFocusOnEnter = null;
 
+        private bool _keepSize = false;
+
         #endregion Declarations
 
         #region Properties
@@ -53,44 +62,93 @@ namespace VAR.Focus.Web.Controls
             set { _nextFocusOnEnter = value; }
         }
 
+        public bool KeepSize
+        {
+            get { return _keepSize; }
+            set { _keepSize = value; }
+        }
+
+        public string Text
+        {
+            get { return _txtContent.Text; }
+            set { _txtContent.Text = value; }
+        }
+
+        public TextBoxMode TextMode
+        {
+            get { return _txtContent.TextMode; }
+            set { _txtContent.TextMode = value; }
+        }
+
         #endregion Properties
 
         #region Control life cycle
 
         public CTextBox()
         {
+            Init += CTextBox_Init;
             PreRender += CTextbox_PreRender;
         }
 
+        private void CTextBox_Init(object sender, EventArgs e)
+        {
+            Controls.Add(_txtContent);
+
+            if (TextMode == TextBoxMode.MultiLine)
+            {
+                if (_keepSize)
+                {
+                    _hidSize = new HiddenField();
+                    Controls.Add(_hidSize);
+                }
+
+                string strCfgName = string.Format("{0}_cfg", this.ClientID);
+                Dictionary<string, object> cfg = new Dictionary<string, object>
+                {
+                    {"txtContent", _txtContent.ClientID},
+                    {"hidSize", _hidSize.ClientID},
+                    {"keepSize", _keepSize },
+                };
+                JsonWriter jsonWriter = new JsonWriter();
+                StringBuilder sbCfg = new StringBuilder();
+                sbCfg.AppendFormat("<script>\n");
+                sbCfg.AppendFormat("var {0} = {1};\n", strCfgName, jsonWriter.Write(cfg));
+                sbCfg.AppendFormat("CTextBox_Multiline_Init({0});\n", strCfgName);
+                sbCfg.AppendFormat("</script>\n");
+                LiteralControl liScript = new LiteralControl(sbCfg.ToString());
+                Controls.Add(liScript);
+            }
+        }
+
         private void CTextbox_PreRender(object sender, EventArgs e)
         {
-            CssClass = CssClassBase;
+            _txtContent.CssClass = CssClassBase;
             if (string.IsNullOrEmpty(_cssClassExtra) == false)
             {
-                CssClass = string.Format("{0} {1}", CssClassBase, _cssClassExtra);
+                _txtContent.CssClass = string.Format("{0} {1}", CssClassBase, _cssClassExtra);
             }
             if (Page.IsPostBack && (_allowEmpty == false && IsEmpty()) || _markedInvalid)
             {
-                CssClass += " textboxInvalid";
+                _txtContent.CssClass += " textboxInvalid";
             }
-            Attributes.Add("onchange", "ElementRemoveClass(this, 'textboxInvalid');");
+            _txtContent.Attributes.Add("onchange", "ElementRemoveClass(this, 'textboxInvalid');");
 
             if (string.IsNullOrEmpty(_placeHolder) == false)
             {
-                Attributes.Add("placeholder", _placeHolder);
+                _txtContent.Attributes.Add("placeholder", _placeHolder);
             }
 
             if (_nextFocusOnEnter != null)
             {
-                this.Attributes.Add("onkeydown", string.Format(
+                _txtContent.Attributes.Add("onkeydown", string.Format(
                     "if(event.keyCode==13){{document.getElementById('{0}').focus(); return false;}}",
                     _nextFocusOnEnter.ClientID));
             }
 
             // FIX: The framework deletes textbox values on password mode
-            if (TextMode == TextBoxMode.Password)
+            if (_txtContent.TextMode == TextBoxMode.Password)
             {
-                Attributes["value"] = Text;
+                _txtContent.Attributes["value"] = _txtContent.Text;
             }
         }
 
@@ -100,12 +158,12 @@ namespace VAR.Focus.Web.Controls
 
         public bool IsEmpty()
         {
-            return string.IsNullOrEmpty(Text);
+            return string.IsNullOrEmpty(_txtContent.Text);
         }
 
         public bool IsValid()
         {
-            return _allowEmpty || (string.IsNullOrEmpty(Text) == false);
+            return _allowEmpty || (string.IsNullOrEmpty(_txtContent.Text) == false);
         }
 
         #endregion Public methods