public void PaintCellsBackground_ValidRowIndex_Success()
{
using (var image = new Bitmap(10, 10))
using (Graphics graphics = Graphics.FromImage(image))
{
var dataGridView = new DataGridView();
dataGridView.Columns.Add("name", "text");
var e = new DataGridViewRowPrePaintEventArgs(dataGridView, graphics, Rectangle.Empty, Rectangle.Empty, 0, DataGridViewElementStates.Displayed, null, new DataGridViewCellStyle(), false, false);
e.PaintCellsBackground(new Rectangle(1, 2, 3, 4), true);
}
}
public void PaintCellsBackground_InvalidRowIndex_ThrowsInvalidOperationException(int rowIndex)
{
using (var image = new Bitmap(10, 10))
using (Graphics graphics = Graphics.FromImage(image))
{
var dataGridView = new DataGridView();
dataGridView.Columns.Add("name", "text");
var e = new DataGridViewRowPrePaintEventArgs(dataGridView, graphics, Rectangle.Empty, Rectangle.Empty, rowIndex, DataGridViewElementStates.Displayed, null, new DataGridViewCellStyle(), false, false);
Assert.Throws <InvalidOperationException>(() => e.PaintCellsBackground(new Rectangle(1, 2, 3, 4), true));
}
}
private void gridSchLibPrimitives_RowPrePaint(object sender, DataGridViewRowPrePaintEventArgs e)
{
if (_loading || e.RowIndex < 0)
{
return;
}
// Draw background depending on the "display mode" matching the current one
var primitive = (SchPrimitive)gridSchLibPrimitives.Rows[e.RowIndex].Tag;
if (!primitive.IsOfCurrentDisplayMode)
{
e.PaintCellsBackground(e.RowBounds, (e.State & DataGridViewElementStates.Selected) == DataGridViewElementStates.Selected);
using (var brush = new HatchBrush(HatchStyle.DiagonalCross, Color.FromKnownColor(KnownColor.ControlDark), Color.Transparent))
{
e.Graphics.FillRectangle(brush, e.RowBounds);
}
// Draw contents
e.PaintCellsContent(e.RowBounds);
e.Handled = true;
}
}
