AbstractGraphicalEditPart（GMF）的上下文相关帮助

Question

问题很简单：要添加上下文相关帮助，我按照标准步骤进行操作，但是一旦我尝试使用IWorkbenchHelpSystem中的SetHelp（）将块链接到上下文ID。第一个参数应为Control（swt）或IAction。void setHelp（Control control，String helpContextId）;。如何从damos.dml.Block对象类型引用控件？org.eclipselabs.damos.dml.blockTypes

FYI我已经尝试并访问了这些网站的所有内容

• http://rajakannappan.blogspot.com/2009/05/context-sensitive-help-in-eclipse.html
• https://help.eclipse.org/2019-03/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Fguide%2Fua_help_context.htm&cp=2_0_19_1_2
• https://help.eclipse.org/luna/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Freference%2Fextension-points%2Forg_eclipse_ui_commands.html

显示和搜索方法正常工作，但是我只需要设置帮助而不显示它，这样仅在调用帮助（F1或ctrl + F1）时才显示上下文帮助。

谢谢。经过尝试后，我想也许这种解决方法可以使我获得相同的结果，但NADA。

private Block getBlock() {
        EObject semanticElement = resolveSemanticElement();
        if (semanticElement instanceof Block) {
            Block block = (Block) semanticElement;
            PlatformUI.getWorkbench().getHelpSystem().search(block.getType().getName());
//PlatformUI.getWorkbench().getHelpSystem().setHelp(?, Activator.HELP_VIEW); Cannot cast block directly to Control 
PlatformUI.getWorkbench().getHelpSystem().displayHelp(Activator.HELP_VIEW);
                return block;
            } else {
                return null;
            }
        }

 @Override
protected NodeFigure createMainFigure() {
    blockFigure = new BlockFigure();
    // OB: java.awt.event.KeyEvent.VK_F1 is wrong, use SWT.F1
    blockFigure.setFocusTraversable(true);
    blockFigure.setRequestFocusEnabled(true);
    blockFigure.addMouseListener(new MouseListener.Stub() {
        @Override
        public void mousePressed(final MouseEvent me) {
            blockFigure.requestFocus();
        }
    });
    blockFigure.addKeyListener(new KeyListener.Stub() {

        @Override
        public void keyReleased(KeyEvent ke) {

        }

        @Override
        public void keyPressed(KeyEvent ke) {
            if (ke.keycode == SWT.F1) {
                PlatformUI.getWorkbench().getHelpSystem().search(getBlock().getType().getName());
                PlatformUI.getWorkbench().getHelpSystem().displayHelp(Activator.HELP_VIEW);
            }
        }
    });
    return blockFigure;
}

感谢您的任何帮助！

Answer 1

   public String getSelection() {
            String blockName = "SelectBlock";
            EObject element = null;
            EditPart part = getDiagramEditPart();
            EditPartViewer viewer = part.getViewer();
            List selectedList = viewer.getSelectedEditParts();
            try {
                GraphicalEditPart editPart = (GraphicalEditPart) selectedList.get(0);
                BlockEditPart blockPart = (BlockEditPart) editPart;
                viewer.getProperty("BlockFigure");
                NodeImpl node = (NodeImpl) blockPart.getModel();
                element = node.getElement();
            } catch (IndexOutOfBoundsException e) {
                // TODO: handle exception
                e.printStackTrace();
            }

            ISelection selection1 = viewer.getSelection();// EURêKA

            if (element instanceof Block) {
                Control control2 = getGraphicalViewer().getControl();
                blockName = ((Block) element).getType().getName();
                return blockName;
                // return part.getParent().getSelected();
            }
            return "SelectBlock";
        }

我可以选择一个块类型CTRL + F1并显示该块的帮助定义。