Simple extension to control Viewer multi-selection by holding the CTRL button
This sample overrides the current Viewer mechanism for selecting elements through an Extension that leverages a custom Tool.
Every time a user clicks in the Viewer, it triggers the handleSingleClick function.
This function basically verifies if the CTRL key is selected, and if so, it aggregates the current element selected to select multiple elements.
When the CTRL key is released then it goes back to the default behavior.
You can also leverage the BoxSelection extension to retrieve all the elements in the view using the snippet below
async function getViewElements(viewer){
const tool = viewer.getExtension('Autodesk.BoxSelection').boxSelectionTool;
const {left: startX, top: startY, right: endX, bottom: endY} = viewer.impl.getCanvasBoundingClientRect();
tool.startPoint.set(startX, startY);
tool.endPoint.set(endX, endY);
let selection = await tool.getSelection();
console.log(selection);
}
This sample is licensed under the terms of the MIT License. Please see the LICENSE file for full details.
João Martins in/jpornelas