protected override void Draw(GameTime gameTime)
{
if (!IsRedrawRequired())
{
return;
}
_spriteBatch.Begin();
int column = 0; int columnStartPx = 0;
while (columnStartPx < _graphics.GraphicsDevice.Viewport.Width)
{
_columnStartPx[column] = columnStartPx;
using (_slate.Lock())
{
for (int y = 0; y < _numRowsInView; y++)
{
_cellCache[y] = _slate.GetCell(new Slate.Core.Point(column, y));
}
}
var columnWidthPx = _cellCache.Max(MeasureCellWidth);
for (int y = 0; y < _numRowsInView; y++)
{
var cell = _cellCache[y];
DrawCell(columnStartPx, y * _style.CellHeight, columnWidthPx, cell);
}
column++;
columnStartPx += columnWidthPx;
}
var newVisibleRegion = new Region(Slate.Core.Point.Zero, new Slate.Core.Point(column, _numRowsInView));
if (!newVisibleRegion.Equals(_visibleRegion))
{
_visibleRegion = newVisibleRegion;
using (_slate.Lock())
{
_slate.SetVisibleRegions(new[] { _visibleRegion });
}
}
_spriteBatch.End();
base.Draw(gameTime);
}
public virtual Cell GetCell(Point at)
{
return(_source.GetCell(at));
}