private async void LabelTooltipOpening(object sender, ToolTipEventArgs e)
{
var chip = sender as MaterialDesignThemes.Wpf.Chip;
var label = chip.Content as string;
var query = string.Format("match(c:{0}) return count(c) as Count", label);
var g = await Neo4jDatabase.ExecuteQueryGraphAsync(query);
chip.ToolTip = string.Format("Database contains {0} instances", g.Values.First());
}
private async void EdgeToolTipOpening(object sender, ToolTipEventArgs e)
{
var container = sender as Button;
var relationshipGlyph = container.Content as string;
var relationship = relationshipGlyph.Replace("-[", "");
relationship = relationship.Replace("]-", "");
var query = string.Format("match ()-[c:{0}]-() return count(c) as Count", relationship);
var g = await Neo4jDatabase.ExecuteQueryGraphAsync(query);
container.ToolTip = string.Format("Database contains {0} instances", g.Values.First());
}
private async Task RepaintAsync()
{
this.Nodes.Children.Clear();
this.Relationships.Children.Clear();
// Get the names of the first 1000 labels, the first 1000 relationships
// and the count of nodes and relationships.
var metadataQuery = @"
CALL db.labels() YIELD label
RETURN {name:'labels', data:COLLECT(label)[..1000]} AS result
UNION ALL
CALL db.relationshipTypes() YIELD relationshipType
RETURN {name:'relationshipTypes', data:COLLECT(relationshipType)[..1000]} AS result
UNION ALL
MATCH () RETURN { name:'nodes', data:count(*) } AS result
UNION ALL
MATCH ()-[]->() RETURN { name:'relationships', data: count(*)} AS result";
var g = await Neo4jDatabase.ExecuteQueryGraphAsync(metadataQuery);
var parts = g.Values.ToArray();
var labelsPart = parts[0];
var labelValues = (labelsPart as Dictionary <string, object>)["data"];
IEnumerable <string> labels = (labelValues as List <object>).Select(o => o as string);
this.LabelsPrompt.Text = string.Format("Node Labels ({0})", labels.Count());
foreach (var label in labels)
{
var labelGlyph = new MaterialDesignThemes.Wpf.Chip()
{
Margin = new Thickness(5, 0, 5, 5),
Content = label,
IsDeletable = false,
ToolTip = "Calculating...",
};
labelGlyph.Click += (_, e) => { this.LabelClicked(label as string); };
labelGlyph.ToolTipOpening += this.LabelTooltipOpening;
this.Nodes.Children.Add(labelGlyph);
}
var relationshipsPart = parts[1];
var relationshipsValues = (relationshipsPart as Dictionary <string, object>)["data"];
var relationshipsList = (relationshipsValues as List <object>).Select(o => o as string);
long relationshipCount = relationshipsList.Count();
this.RelationshipsPrompt.Text = string.Format("Relationships ({0})", relationshipCount);
foreach (var relationship in relationshipsList)
{
var edgeGlyph = new Button()
{
Style = this.Resources["Edges"] as Style,
Margin = new Thickness(-4, -0, -4, 0),
Content = "-[" + (relationship as string) + "]-",
ToolTip = "Calculating...",
};
edgeGlyph.Click += (_, e) => { this.EdgeClicked(relationship as string); };
edgeGlyph.Width -= 24;
edgeGlyph.Height -= 8;
edgeGlyph.ToolTipOpening += this.EdgeToolTipOpening;
this.Relationships.Children.Add(edgeGlyph);
}
}