eclipse-rcp - 确定 Eclipse GEF 中滚动图形查看器的可见区域大小

Question

我正在尝试使用 Eclipse GEF 创建一个简单的应用程序，该应用程序在 ScrollingGraphicalViewer 中显示图表。启动时，我希望图表在查看器内居中(想象一个星形布局，其中星形的中心位于 View 的中心)。

以下是我认为相关的代码部分:

我的看法:

public class View extends ViewPart {
    public static final String ID = "GEFProofOfConcept.view";

...         

    public void createPartControl(Composite parent) {
        viewer.createControl(parent);

        viewer.setRootEditPart(rootEditPart);
        viewer.setEditPartFactory(editPartFactory);

        viewer.setContents(DummyModelCreator.generateModel());          
    }

编辑部分代码:

@Override
protected void refreshVisuals() {
    Project project = (Project) getModel();

    // This is where the actual drawing is done,
    // Simply a rectangle with text
    Rectangle bounds = new Rectangle(50, 50, 75, 50);
    getFigure().setBounds(bounds);
    Label label = new Label(project.getName());
    projectFont = new Font(null, "Arial", 6, SWT.NORMAL);
    label.setFont(projectFont);
    label.setTextAlignment(PositionConstants.CENTER);
    label.setBounds(bounds.crop(IFigure.NO_INSETS));

    getFigure().add(label);

    setLocation();
}

private void setLocation() {
    Project project = (Project) getModel();

    if (project.isRoot()) {
        // Place in centre of the layout
        Point centrePoint = new Point(0, 0); // This is where I need the center of the view
        getFigure().setLocation(centrePoint);
    } else {
        ...
    }       
}

以及上述编辑部分的父级:

public class ProjectDependencyModelEditPart extends AbstractGraphicalEditPart {

@Override
protected IFigure createFigure() {
    Figure f = new FreeformLayer();
    f.setLayoutManager(new XYLayout());

    return f;
}
...

也欢迎该问题的替代解决方案，我肯定是 GEF(以及一般的 Eclipse)新手。

Answer 1

为任何感兴趣的人解决了这个问题:

        Dimension viewSize = (((FigureCanvas) getViewer().getControl()).getViewport().getSize());