/// ------------------------------------------------------------------------------------
/// <summary>
/// Processes down key when a grid cell is in the edit mode. This overrides the default
/// behavior in a grid cell when it's being edited so using the down arrow will move the
/// IP down one line rather than moving to the next row.
/// </summary>
/// ------------------------------------------------------------------------------------
protected virtual bool ProcessDownKey(TextBox txtBox)
{
// Don't override the default behavior if all the text is selected or not multi-line.
if (txtBox.SelectedText == txtBox.Text || !txtBox.Multiline)
return false;
int chrIndex = txtBox.SelectionStart;
Point pt = txtBox.GetPositionFromCharIndex(chrIndex);
pt.Y += TextRenderer.MeasureText("x", txtBox.Font).Height;
var proposedNewSelection = txtBox.GetCharIndexFromPosition(pt);
if (proposedNewSelection <= chrIndex)
return false; // Don't let "down" take you *up*. (See SP-220.)
txtBox.SelectionStart = proposedNewSelection;
return true;
}
/// <include file='doc\ToolStripTextBox.uex' path='docs/doc[@for="ToolStripTextBox.GetCharIndexFromPosition"]/*' />
public int GetCharIndexFromPosition(System.Drawing.Point pt)
{
return(TextBox.GetCharIndexFromPosition(pt));
}
/// ------------------------------------------------------------------------------------
/// <summary>
/// Processes up key when a grid cell is in the edit mode. This overrides the default
/// behavior in a grid cell when it's being edited so using the up arrow will move the
/// IP up one line rather than moving to the previous row.
/// </summary>
/// ------------------------------------------------------------------------------------
protected virtual bool ProcessUpKey(TextBox txtBox)
{
// Don't override the default behavior if all the text is selected or not multi-line.
if (txtBox.SelectedText == txtBox.Text || !txtBox.Multiline)
return false;
int selectionPosition = txtBox.SelectionStart;
// Getting the position after the very last character doesn't work.
if (selectionPosition == txtBox.Text.Length && selectionPosition > 0)
selectionPosition--;
Point pt = txtBox.GetPositionFromCharIndex(selectionPosition);
if (pt.Y == 0)
return false;
pt.Y -= TextRenderer.MeasureText("x", txtBox.Font).Height;
txtBox.SelectionStart = txtBox.GetCharIndexFromPosition(pt);
return true;
}