public void AddDependency(FunctionalDependency item)
{
bool closureGrowing = true;
if (!_dependencies.Contains(item)) _dependencies.Add(item);
_closures[item.X].Add(item.Y);
_EvaluateTransitiveClosure(item.X);
while (closureGrowing)
{
closureGrowing = false;
foreach (KeyValuePair<AttributeSet, AttributeSet> pair in _closures)
{
closureGrowing = closureGrowing || _EvaluateTransitiveClosure(pair.Key);
}
}
_CreateKeys();
}
private Paragraph _CreateDependencyEntry(FunctionalDependency fd)
{
Paragraph block;
InlineUIContainer container;
LinearGradientBrush removeBrush;
Button remove;
Path arrow;
GeometryGroup arrowLines;
removeBrush = new LinearGradientBrush(Colors.White, Colors.DarkGray, new Point(0.5, 0.0), new Point(0.5, 1.0));
removeBrush.GradientStops[0].Offset = 0.0;
removeBrush.GradientStops[1].Offset = 0.2;
remove = new Button();
remove.Content = "X";
remove.Tag = fd.GetHashCode();
remove.FontSize = 8;
remove.FontWeight = FontWeights.Bold;
remove.Foreground = Brushes.White;
remove.Margin = new Thickness(0.0, 0.0, 7.0, 0.0);
remove.Height = 15;
remove.Width = 15;
remove.VerticalContentAlignment = System.Windows.VerticalAlignment.Stretch;
remove.Background = removeBrush;
remove.ToolTip = "Remove this FD.";
remove.Click += new RoutedEventHandler(removeFdButton_Click);
container = new InlineUIContainer(remove);
container.BaselineAlignment = BaselineAlignment.Center;
block = new Paragraph();
block.Tag = fd.GetHashCode();
block.Inlines.Add(container);
block.Inlines.Add(fd.X.ToString());
arrow = new Path();
arrow.Margin = new Thickness(3.0, 0.0, 3.0, 0.0);
arrow.SnapsToDevicePixels = true;
arrow.Stroke = Brushes.Black;
arrow.StrokeThickness = 1.0;
arrow.FlowDirection = System.Windows.FlowDirection.LeftToRight;
arrow.HorizontalAlignment = HorizontalAlignment.Center;
arrow.VerticalAlignment = VerticalAlignment.Center;
arrowLines = new GeometryGroup();
arrowLines.Children.Add(new LineGeometry(new Point(10.0, 2.0), new Point(15.0, 6.0)));
arrowLines.Children.Add(new LineGeometry(new Point(0.0, 6.0), new Point(15.0, 6.0)));
arrowLines.Children.Add(new LineGeometry(new Point(10.0, 10.0), new Point(15.0, 6.0)));
arrow.Data = arrowLines;
block.Inlines.Add(arrow);
block.Inlines.Add(fd.Y.ToString());
return block;
}