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/// <summary> Recalculate row count, column count and the rectangle that is onscreen. </summary>
///
/// <remarks> Darrellp, 10/12/2011. </remarks>
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internal void RecalculateSize()
{
// Do some magic to get pixels and thence rows/columns
Size sizeScreenMap = PixelConversions.GetElementPixelSize(_mapHost);
_screenColumnCount = (int)sizeScreenMap.Width / _charWidth;
_screenRowCount = (int)sizeScreenMap.Height / _charHeight;
_onScreen = new Rect(_onScreen.Left, _onScreen.Top, _screenColumnCount, _screenRowCount);
}
private void ScrollBy(int dleft, int dtop)
{
_onScreen = new Rect(_onScreen.Left - dleft, _onScreen.Top - dtop, _onScreen.Width, _onScreen.Height);
_terminal.Scroll(dleft, dtop, ScrollCallback);
}
