Fix graph interactivity: use NiceGUI element ref and requestAnimationFrame
The click handlers weren't attaching because getElementById couldn't find the container — Python's id() generated IDs that didn't survive NiceGUI's DOM rendering. Now uses getElement() with the NiceGUI element ID and defers JS via requestAnimationFrame to ensure the DOM is ready. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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@@ -428,28 +428,30 @@ def _render_graphviz(dot_source: str, selected_node_id: str | None = None):
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svg = src.pipe(format='svg').decode('utf-8')
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# (a) Keep SVG at natural size, let scroll container handle overflow
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container_id = f'graph-{id(dot_source)}'
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html_content = (
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f'<div id="{container_id}" '
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f'style="overflow: auto; max-height: 500px; width: 100%;">'
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html_el = ui.html(
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f'<div style="overflow: auto; max-height: 500px; width: 100%;">'
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f'{svg}</div>'
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)
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ui.html(html_content)
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# (b) + (c) JS click handlers + visual feedback
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# Use NiceGUI's element ID (getElement) for reliable DOM lookup
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sel_escaped = selected_node_id.replace("'", "\\'") if selected_node_id else ''
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ui.run_javascript(f'''
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(function() {{
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const container = document.getElementById('{container_id}');
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requestAnimationFrame(() => {{
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const wrapper = getElement({html_el.id});
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if (!wrapper) return;
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const container = wrapper.querySelector('div');
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if (!container) return;
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// CSS for interactivity
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const style = document.createElement('style');
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const uid = 'graph-' + {html_el.id};
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container.id = uid;
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style.textContent = `
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#{container_id} g.node {{ cursor: pointer; }}
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#{container_id} g.node:hover {{ filter: brightness(1.3); }}
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#{container_id} g.node.selected ellipse,
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#{container_id} g.node.selected polygon[stroke]:not([stroke="none"]) {{
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#${{uid}} g.node {{ cursor: pointer; }}
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#${{uid}} g.node:hover {{ filter: brightness(1.3); }}
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#${{uid}} g.node.selected ellipse,
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#${{uid}} g.node.selected polygon[stroke]:not([stroke="none"]) {{
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stroke: #f59e0b !important;
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stroke-width: 3px !important;
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}}
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@@ -462,7 +464,6 @@ def _render_graphviz(dot_source: str, selected_node_id: str | None = None):
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const title = g.querySelector('title');
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if (title) {{
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window.graphSelectedNode = title.textContent.trim();
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// Visual: remove old selection, add new
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container.querySelectorAll('g.node.selected').forEach(
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el => el.classList.remove('selected'));
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g.classList.add('selected');
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@@ -480,7 +481,7 @@ def _render_graphviz(dot_source: str, selected_node_id: str | None = None):
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}}
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}});
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}}
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}})();
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}});
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''')
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except ImportError:
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ui.label('Install graphviz Python package for graph rendering.').classes('text-warning')
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