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Add onZoomChange prop to Graph #354

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merged 4 commits into from
Aug 8, 2020
Merged

Add onZoomChange prop to Graph #354

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a701d2d
Add onZoomChange prop to Graph
TranquilMarmot Aug 3, 2020
99741c0
Merge branch 'master' of github.com:TranquilMarmot/react-d3-graph int…
TranquilMarmot Aug 8, 2020
9ae61b6
Debounce onZoomChange
TranquilMarmot Aug 8, 2020
5985df2
Show current zoom in sandbox
TranquilMarmot Aug 8, 2020
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13 changes: 12 additions & 1 deletion src/components/graph/Graph.jsx
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Original file line number Diff line number Diff line change
Expand Up @@ -101,6 +101,10 @@ import { merge, throwErr } from "../../utils";
* window.alert(`Node ${nodeId} moved to new position x= ${x} y= ${y}`);
* };
*
* const onZoomChange = function(newZoom) {
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* window.alert(`Graph is now zoomed at ${newZoom}`);
* };
*
*
* <Graph
* id='graph-id' // id is mandatory, if no id is defined rd3g will throw an error
Expand All @@ -115,7 +119,8 @@ import { merge, throwErr } from "../../utils";
* onMouseOverNode={onMouseOverNode}
* onMouseOutNode={onMouseOutNode}
* onMouseOverLink={onMouseOverLink}
* onMouseOutLink={onMouseOutLink}/>
* onMouseOutLink={onMouseOutLink}
* onZoomChange={onZoomChange}/>
*/
export default class Graph extends React.Component {
/**
Expand Down Expand Up @@ -302,6 +307,12 @@ export default class Graph extends React.Component {
d3SelectAll(`#${this.state.id}-${CONST.GRAPH_CONTAINER_ID}`).attr("transform", transform);

this.state.config.panAndZoom && this.setState({ transform: transform.k });

// only send zoom change events if the zoom has changed (_zoomed() also gets called when panning)
if (this.props.onZoomChange && this.state.previousZoom !== transform.k) {
this.setState({ previousZoom: transform.k });
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this.props.onZoomChange(transform.k);
}
};

/**
Expand Down