/// <summary>
/// Pres the process wm key down_ up.
/// </summary>
/// <param name="m">The m.</param>
/// <returns></returns>
protected virtual bool PreProcessWmKeyDown_Up(ref Message m)
{
long pos = HexViewer.bytePosition;
int cp = HexViewer.byteCharacterPosition;
if (!(pos == 0 && cp == 0))
{
pos = Math.Max(-1, pos - HexViewer.hexMaxHBytes);
if (pos == -1)
{
return(true);
}
HexViewer.SetPosition(pos);
if (pos < HexViewer.startByte)
{
HexViewer.PerformScrollLineUp();
}
HexViewer.UpdateCaret();
HexViewer.Invalidate();
}
HexViewer.ScrollByteIntoView();
HexViewer.ReleaseSelection();
return(true);
}
