protected void UpdateCursorLocation(TextBox tb)
{
cursorLineNo = tb.GetLineFromCharIndex(tb.SelectionStart) + 1;
cursorColumnNo = tb.SelectionStart - tb.GetFirstCharIndexOfCurrentLine() + 1;
// Update cursor position on status bar:
mainStatusStripCursorPosLabel.Text = "(" + cursorLineNo.ToString() + ", " +
cursorColumnNo.ToString() + ")";
}
/// <summary>
/// Gets the current line from a TextBox control.
/// </summary>
/// <param name="tb">the TextBox control.</param>
/// <returns>the current line.</returns>
public static String getCurrentLine(TextBox tb)
{
if (tb.Lines.Length == 0)
{
return tb.Text;
}
else
{
int startIndex = tb.GetFirstCharIndexOfCurrentLine();
int currentLineNumber = tb.GetLineFromCharIndex(startIndex);
return tb.Lines[currentLineNumber];
}
}
public static Point GetCaretPosition(this TextBox textBox)
{
Point point = new Point(0, 0);
if (textBox.Focused)
{
point.X = textBox.SelectionStart - textBox.GetFirstCharIndexOfCurrentLine() + 1;
point.Y = textBox.GetLineFromCharIndex(textBox.SelectionStart) + 1;
}
return(point);
}
/// <summary>
/// Gets the current line number.
/// </summary>
/// <param name="tb">a TextBox.</param>
/// <returns>the current line number.</returns>
public static int getCurrentLineNo(TextBox tb)
{
if (tb.Lines.Length == 0)
{
return 0;
}
else
{
int startIndex = tb.GetFirstCharIndexOfCurrentLine();
return tb.GetLineFromCharIndex(startIndex);
}
}
/// <summary>
/// Gets a key/value pair containing currentLineNumber/currentLine.
/// </summary>
/// <param name="tb">the TextBox.</param>
/// <returns>a key/value pair containing currentLineNumber/currentLine.</returns>
public static KeyValuePair<int, String> getCurrentLineAndLineNo(TextBox tb)
{
if (tb.Lines.Length == 0)
{
return new KeyValuePair<int, String>(0,tb.Text);
}
else
{
int startIndex = tb.GetFirstCharIndexOfCurrentLine();
int currentLineNumber = tb.GetLineFromCharIndex(startIndex);
return new KeyValuePair<int,String>(currentLineNumber, tb.Lines[currentLineNumber]);
}
}
/// <include file='doc\ToolStripTextBox.uex' path='docs/doc[@for="ToolStripTextBox.GetFirstCharIndexOfCurrentLine"]/*' />
public int GetFirstCharIndexOfCurrentLine()
{
return(TextBox.GetFirstCharIndexOfCurrentLine());
}