Interactive node-link visualizer turning adjacency maps into interactive diagrams with force-directed layout, selectable nodes, customizable per-node styles, lightweight quick-start API and runnable demo.
Koraph is a Compose Multiplatform graph visualization library for turning adjacency maps into interactive node-link diagrams.
Koraph is a Compose Multiplatform project that includes:
composeApp: demo app for Android, iOS, JS, and Wasmgraph-visualizer: reusable graph visualization library (Map<Key, List<Key>> input)You can try the web sample app at: https://rootachieve.github.io/Koraph/
Koraph releases are published to Maven Central:
// settings.gradle.kts
dependencyResolutionManagement {
repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
repositories {
google()
mavenCentral()
}
}
// build.gradle.kts
dependencies {
implementation("io.github.rootachieve:Koraph:<version>")
}
./gradlew :graph-visualizer:allTests
./gradlew :composeApp:assembleDebug
Use SimpleGraphVisualizer for a quick start without manually creating full node metadata.
enum class NodeKey { Gateway, Search, Users }
val adjacency = mapOf(
NodeKey.Gateway to listOf(NodeKey.Search, NodeKey.Users),
NodeKey.Search to listOf(NodeKey.Users),
)
SimpleGraphVisualizer(
adjacency = adjacency,
onSelectionChange = { selected ->
println("Selected node: ${selected?.name ?: "none"}")
},
)
You can also apply lightweight per-node customization with nodeInfoFactory.
SimpleGraphVisualizer(
adjacency = adjacency,
nodeInfoFactory = { key ->
NodeInfo(
name = key.name,
size = if (key == NodeKey.Gateway) 24f else 18f,
)
},
)
For full control, provide nodeInfo, tuned options, and custom style rules.
More detailed advanced usage documentation will be added in a future docs update.
Licensed under Apache-2.0. See LICENSE.
enum class NodeKey { Gateway, Search, Users, Alerts, Custom }
val adjacency: Map<NodeKey, List<NodeKey>> = mapOf(
NodeKey.Gateway to listOf(NodeKey.Search, NodeKey.Alerts),
NodeKey.Search to listOf(NodeKey.Users),
NodeKey.Users to listOf(NodeKey.Gateway),
)
val nodeInfo: Map<NodeKey, NodeInfo> = mapOf(
NodeKey.Gateway to NodeInfo(name = "Gateway", style = NodeShape.RoundedRect, size = 24f),
NodeKey.Search to NodeInfo(name = "Search", style = NodeShape.Circle, size = 18f),
NodeKey.Users to NodeInfo(name = "Users", style = NodeShape.Hexagon, size = 20f),
NodeKey.Alerts to NodeInfo(name = "Alerts", style = NodeShape.Diamond, size = 22f),
)
GraphVisualizer(
adjacency = adjacency,
nodeInfo = nodeInfo,
options = GraphVisualizerOptions.presentation().copy(
interaction = GraphInteractionConfig(
minScale = 0.4f,
maxScale = 6f,
tapSelectionPadding = 12f,
clearSelectionOnBackgroundTap = false,
),
label = GraphLabelConfig(widthDp = 120f, fontSizeSp = 13f),
layout = ForceLayoutConfig(centerTension = 0.035f),
),
nodeStyle = { input ->
val info = input.nodeInfo
NodeStyle(
shape = info.style,
fillColor = when (input.selectionState) {
SelectionState.Selected -> info.selectedColor
SelectionState.OtherSelected -> Color(0xFFD1D5DB)
SelectionState.NoneSelected -> info.color
},
strokeColor = when (input.selectionState) {
SelectionState.Selected -> info.selectedStrokeColor
SelectionState.OtherSelected -> Color(0xFF6B7280)
SelectionState.NoneSelected -> info.strokeColor
},
radius = info.size,
labelColor = info.labelColor,
)
},
)
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