private void Render()
{
text = String.Empty;
var g = buffer.Graphics;
g.Clear(this.BackColor);
if (!initialized || storage == null)
{
return;
}
int x = 0, y = 0;
var view = zoom.Viewport;
int colStart = Math.Max(0, view.Left);
int rowStart = Math.Max(0, view.Top);
int colEnd = Math.Min(columns, view.Right);
int rowEnd = Math.Min(rows, view.Bottom);
int size = zoom.BlockSize;
if (rowStart < rowEnd && colStart < colEnd && zoom.Level > 2)
{
foreach (var item in storage.EnumerateSubmatrix(rowStart, rowEnd, colStart, colEnd))
{
x = item.Column;
y = item.Row;
zoom.WorldToScreen(ref x, ref y);
g.FillRectangle(Brushes.Blue, x, y, size, size);
}
}
else
{
foreach (var item in storage.Enumerate())
{
x = item.Column;
y = item.Row;
zoom.WorldToScreen(ref x, ref y);
g.FillRectangle(Brushes.Blue, x, y, size, size);
}
}
this.Invalidate();
}