Eclipse插件视图-如何动态添加和处理复合材料

Question

The Use Case is simple:

In a Scrolled Composite, I have a Dropdown menu and, when I select an item from it, several ChartComposites spawn in a grid layout underneath.

I then select the dropdown again, I click another item, all previously spawned composites are disposed and the view is populated with new ones.

Now for more details:

Both the Dropdown and the ChartComposites are contained in a regular Composite (because I can only set one Composite to the ScrolledComposite) which has a grid layout, because I want them arranged in a certain way.

The problem is I have no idea how I can call the createPartControl() after the view has been created in order to dispose of the composites I no longer want and create the new composites.

I tried using a Content Provider but I don't think it works for premade Composites, because the results were that the ChartComposites it was supposed to return got cast into Objects and were no longer...charts.

I considered using a StackLayout but I really need the GridLayout I currently have so that doesn't work.

So does anyone know a quick and easy way to dispose of and add composites to an already created view through listeners (select a dropdown item, push a button etc)?

Answer 1

You can use StackLayout and GridLayout to achieve this without having to mess around with dispose .

It is not clear from your question exactly what the GUI design is. The following code stacks multiple composite children:

Composite parent = new Composite(body, SWT.NONE);
parent.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
StackLayout layout = new StackLayout();
parent.setLayout(layout);

Composite child1 = new Composite(parent, SWT.NONE);
child1.setLayout(new GridLayout());
// TODO .... add controls to child1 for first 'page'

Composite child2 = new Composite(parent, SWT.NONE);
child2.setLayout(new GridLayout());
// TODO .... add controls to child2 for second 'page'

layout.topControl = child;
layout.layout();