vaadin/classic-components

Vaadin web components

This package contains all Vaadin web components (free and commercial).

See https://github.com/vaadin/web-components for more details.

classic-components's Issues

GridLayout classic does not scroll inside flow VerticalLayout

Ist just a VerticalLayout with a H1 as header, the GridLayout and a FormLayout below.

If you scroll you can see, that the GridLayout remains static, only the H1 and the FormLayout take part in scrolling.

`
VerticalLayout vLayout = new VerticalLayout();
vLayout.add(new H1("Some Header Above"));

	GridLayout gridLayout = new GridLayout(5, 5);
	for (int row = 0; row < gridLayout.getRows(); row++) {
		TextField text = new TextField("GridLayoutRow " + row);
		gridLayout.addComponent(text, 0, row);
	}
	
	FormLayout formLayout = new FormLayout();
	formLayout.setResponsiveSteps(new ResponsiveStep("0", 2));
	for (int i = 0; i < 30; i++) {
		TextField text = new TextField("FormLayout " + i);
		formLayout.add(text);
	}
	
	vLayout.add(gridLayout);
	vLayout.add(formLayout);

`

Performance Issue with classic components GridLayout

We use a generated GUI based on classic GridLayout.

Our MultiLineGridLayout is a subclass of com.vaadin.classic.v8.ui.GridLayout similar to the old Vaadin8 Version of the classic.

When displaying the component I have to wait more than 5 seconds until the GridLayout is displayed.
The flow component above is displayed immediately.
We had no such behaviour in Vaadin8.

Is there a performance problem in com.vaadin.classic.v8.ui.GridLayout?