Add initial data support

network.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"fmt"
+	"path"
+
+	"github.com/divan/graphx/formats"
+	"github.com/divan/graphx/graph"
+)
+
+// Network represents network graph and information, used for
+// for simulation and visualization.
+type Network struct {
+	Name        string
+	Description string
+	Data        *graph.Graph
+
+	NodesCount int
+}
+
+// LoadNetwork loads network information from the JSON file.
+// JSON format is specified in graphx/formats package.
+func LoadNetwork(file string) (*Network, error) {
+	name := path.Base(file)
+	desc := ""
+
+	g, err := formats.FromD3JSON(file)
+	if err != nil {
+		return nil, fmt.Errorf("open '%s': %v", file, err)
+	}
+
+	return &Network{
+		Name:        name,
+		Description: desc,
+		Data:        g,
+	}, nil
+}

network_selector.go

@@ -11,15 +11,14 @@ import (
 type NetworkSelector struct {
 	vecty.Core
 
-	description string
+	current  *Network
+	networks map[string]*Network
 	value    string
 }
 
 // NewNetworkSelector creates new NetworkSelector.
-func NewNetworkSelector(defaultValue string) *NetworkSelector {
-	return &NetworkSelector{
-		value: defaultValue,
-	}
+func NewNetworkSelector(defaultNet string) *NetworkSelector {
+	return &NetworkSelector{}
 }
 
 // Render implements the vecty.Component interface.
@@ -75,22 +74,20 @@ func (n *NetworkSelector) descriptionBlock() *vecty.HTML {
 			vecty.Style("font-style", "italic"),
 			vecty.Style("color", "blue"),
 		),
-		vecty.Text(n.description),
+		vecty.Text(n.current.Description),
 	)
 }
 
 // onChange implements handler for select input changed value
 func (n *NetworkSelector) onChange(e *vecty.Event) {
-	var desc string
 	value := e.Target.Get("value").String()
 	for i := 0; i < e.Target.Length(); i++ {
 		optValue := e.Target.Index(i).Get("value").String()
 		if optValue == value {
-			desc = e.Target.Index(i).Get("description").String()
+			//desc = e.Target.Index(i).Get("description").String()
 		}
 	}
 
 	n.value = value
-	n.description = desc
 	vecty.Rerender(n)
 }