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Add LGraphCanvas.isNodeVisible (#711)

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Add LGraphCanvas.isNodeVisible or more efficient node visibility checks.
This commit is contained in:
Chenlei Hu
2025-03-06 15:20:51 -05:00
committed by GitHub
parent a5c2464c88
commit 54f96ca028
1 changed files with 19 additions and 1 deletions
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20
src/LGraphCanvas.ts
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@@ -464,7 +464,13 @@ export class LGraphCanvas implements ConnectionColorContext {
resizingGroup: LGraphGroup | null = null
/** @deprecated See {@link LGraphCanvas.selectedItems} */
selected_group: LGraphGroup | null = null
/** The nodes that are currently visible on the canvas. */
visible_nodes: LGraphNode[] = []
/**
* The IDs of the nodes that are currently visible on the canvas. More
* performant than {@link visible_nodes} for visibility checks.
*/
#visible_node_ids: Set<NodeId> = new Set()
node_over?: LGraphNode
node_capturing_input?: LGraphNode | null
highlighted_links: Dictionary<boolean> = {}
@@ -4017,6 +4023,15 @@ export class LGraphCanvas implements ConnectionColorContext {
return visible_nodes
}
/**
* Checks if a node is visible on the canvas.
* @param node The node to check
* @returns `true` if the node is visible, otherwise `false`
*/
isNodeVisible(node: LGraphNode): boolean {
return this.#visible_node_ids.has(node.id)
}
/**
* renders the whole canvas content, by rendering in two separated canvas, one containing the background grid and the connections, and one containing the nodes)
*/
@@ -4031,8 +4046,11 @@ export class LGraphCanvas implements ConnectionColorContext {
if (this.graph) this.ds.computeVisibleArea(this.viewport)
// Compute node size before drawing links.
if (this.dirty_canvas || force_canvas)
if (this.dirty_canvas || force_canvas) {
this.computeVisibleNodes(undefined, this.visible_nodes)
// Update visible node IDs
this.#visible_node_ids = new Set(this.visible_nodes.map(node => node.id))
}
if (
this.dirty_bgcanvas ||