public void Split()
{
if (secondaryTextArea == null) {
secondaryTextArea = new TextAreaControl(this);
secondaryTextArea.Dock = DockStyle.Bottom;
secondaryTextArea.Height = Height / 2;
secondaryTextArea.TextArea.GotFocus += delegate {
SetActiveTextAreaControl(secondaryTextArea);
};
textAreaSplitter = new Splitter();
textAreaSplitter.BorderStyle = BorderStyle.FixedSingle ;
textAreaSplitter.Height = 8;
textAreaSplitter.Dock = DockStyle.Bottom;
textAreaPanel.Controls.Add(textAreaSplitter);
textAreaPanel.Controls.Add(secondaryTextArea);
InitializeTextAreaControl(secondaryTextArea);
secondaryTextArea.OptionsChanged();
} else {
SetActiveTextAreaControl(primaryTextArea);
textAreaPanel.Controls.Remove(secondaryTextArea);
textAreaPanel.Controls.Remove(textAreaSplitter);
secondaryTextArea.Dispose();
textAreaSplitter.Dispose();
secondaryTextArea = null;
textAreaSplitter = null;
}
}