It's almost good. There is only a problem with the background color. It should be all white. (The invisible part is not white)
function AlaprajzMentes() {
let downloadLink = document.createElement('a');
downloadLink.setAttribute('download', 'alaprajz.jpg');
var planView = application.getHomeController(application.getHomes()[0]).getPlanController().getView();
var oldGridColor = planView.gridColor;
planView.gridColor = "white";
planView.repaint();
var canvas = document.createElement('canvas');
canvas.width = planView.getPreferredSize().width * 2;
canvas.height = planView.getPreferredSize().height * 2;
planView.paintComponent(new Graphics2D(canvas));
setTimeout(function () {
let dataURL = canvas.toDataURL('image/jpg');
let url = dataURL.replace(/^data:image\/jpg/, 'data:application/octet-stream');
downloadLink.setAttribute('href', url);
downloadLink.click();
planView.gridColor = oldGridColor;
planView.repaint();
}, 100);
}
