TextDynamic has the ability to store several documents in one editor. If you create a "double editor" you can work with 2 texts in two editor windows. But this is not what is meant here. Here we show how to create many documents and hold them all in the editor. We can switch between them and remove the documents if required. This all works like the MDI example only that just one editor is used.

Advantages

Disadvantages

Excerpt from the demo (c#)

In our example we create a simple form, place a TextDynamic control.

The text control is initialized in Form.OnLoad:

private void WinForm_Load(object sender, System.EventArgs e)
{
  // wpdllInt1.EditorStart( your_name, your_key );
  // Load the PCC file (no password)
  wpdllInt1.SetLayout(".\\buttons.pcc","");
  // Initialize the editor
  wpdllInt1.SetEditorMode(
  // as single editor
  EditorMode.wpmodSingleEditor ,
  EditorXMode.wpmodexToolbarLG|
  EditorXMode.wpmodexPDFExport|
  EditorXMode.wpmodexSpellcheck|
  EditorXMode.wpmodexTables,
  EditorGUI.wpguiRuler|
  EditorGUI.wpguiHorzScrollBar|
  EditorGUI.wpguiVertScrollBar|
  EditorGUI.wpguiPanelH1,
  EditorGUI.wpguiDontSet);
  // see: http://www.wpcubed.com/manuals/tdref/IDH_WPDLLInt_SetLayoutMode.htm
  wpdllInt1.SetLayoutMode(7,1,100);
  // Set Size - align to complete window
  wpdllInt1.SetBounds(
   ClientRectangle.Left,
   ClientRectangle.Top,
   ClientRectangle.Right-ClientRectangle.Left,
   ClientRectangle.Bottom-ClientRectangle.Top  );
  wpdllInt1.Anchor =
   AnchorStyles.Left|AnchorStyles.Right
   |AnchorStyles.Top|AnchorStyles.Bottom;
}

Now we add a main menu with two main items and some items in the first, the File menu. In the .NET 2 example we used a MenuStrip. (Instead of MenuItems use DropDownItems!)



To keep track of the loaded files we can use the item list in the "Window" menu. We could also use a string list or combo box.

We need a new MenuItem class which can store a custom string value, "RTFID".

.NET 1.1
public class TagMenuItem : System.Windows.Forms.MenuItem
{
   public string RTFID;
}

.NET 2.0
public class TagMenuItem : System.Windows.Forms.ToolStripMenuItem
{
            public string RTFID;
}

This function create a new menu item and add a RTF data element. There is also the OnClick event handler which selects a data element.

private int textnr = 0;
private TagMenuItem currentmenu;

private void TagMenuItem_Click(object sender, System.EventArgs e)
{
   wpdllInt1.Memo.RTFDataSelect(((TagMenuItem)sender).RTFID);
   wpdllInt1.Memo.TextCommand(5,0,0);
   currentmenu = ((TagMenuItem)sender);
   for(int i=0;i<WindowMenu.MenuItems.Count;i++)
     WindowMenu.MenuItems[i].Checked = false;
/* .NET 2 code:
       for (int i = 0; i < WindowMenu.DropDownItems.Count; i++)
           ((ToolStripMenuItem)WindowMenu.DropDownItems[i]).Checked = false;
*/
   currentmenu.Checked = true;
}

private TagMenuItem AddANewFile()
{
   TagMenuItem men = new TagMenuItem();
   men.Click += new System.EventHandler(this.TagMenuItem_Click);
   men.Text  = "Text " + Convert.ToString(++textnr);
   men.RTFID = "TXT" + Convert.ToString(textnr);
   WindowMenu.MenuItems.Add(WindowMenu.MenuItems.Count,men);
   //.NET 2: WindowMenu.DropDownItems.Add(men);
   wpdllInt1.Memo.RTFDataAdd(men.RTFID,men.RTFID);
   wpdllInt1.Memo.RTFDataSelect(men.RTFID);
   men.RadioCheck = true;
   for(int i=0;i<WindowMenu.MenuItems.Count;i++)
     WindowMenu.MenuItems[i].Checked = false;
/* .NET 2 code:
       for (int i = 0; i < WindowMenu.DropDownItems.Count; i++)
           ((ToolStripMenuItem)WindowMenu.DropDownItems[i]).Checked = false;
*/
   men.Checked = true;
   currentmenu = men;
   wpdllInt1.Memo.TextCommand(5,0,0);
   CloseFile.Enabled = (WindowMenu.MenuItems.Count>1); 
   return men;
}

We use this code in the click events:

New:

private void NewFile_Click(object sender, System.EventArgs e)
{
   AddANewFile();
}

Open:

private void OpenFile_Click(object sender, System.EventArgs e)
{
   TagMenuItem old, men;
   old = currentmenu;
   men = AddANewFile();
   if(!wpdllInt1.Memo.Load("",""))
   {
      if(old!=null)wpdllInt1.Memo.RTFDataSelect(old.RTFID);
      else wpdllInt1.Memo.RTFDataSelect("");
      wpdllInt1.Memo.ReformatAll(false, true);
   }
   else men.Text = wpdllInt1.Memo.LastFileName;
}


Close:

private bool AbortClose; // this is needed later
private void CloseFile_Click(object sender, System.EventArgs e)
{
   if((currentmenu!=null)
      &&(wpdllInt1.Memo.TextCommand(3,0,0)!=0) // CANCLOSE 
          )
   {
      if(WindowMenu.MenuItems.Count>1)
      {
      string s;
      s = currentmenu.RTFID; 
      currentmenu.Dispose();                    TagMenuItem_Click(WindowMenu.MenuItems[0],null);
      wpdllInt1.Memo.RTFDataDelete(s);
      }
      else
      {
         wpdllInt1.Memo.Clear(false, false);
          wpdllInt1.Memo.TextCommand(5,0,0);
           }
   } else AbortClose = true;
}

It would be nice to update the menu captions show the current file name when the file was saved under a new name. We also insert an asterix if the file was modified.

private void wpdllInt1_OnNotify(object Sender, int Editor, int MsgID)
{
   if ((currentmenu!=null)&&((MsgID==27)||(MsgID==28)))
       currentmenu.Text =
      ((wpdllInt1.Memo.Modified)?"*":"")+
            wpdllInt1.Memo.LastFileName;
}