ToolBar in IContributionItem

Question

我有下面的代码片段，它可以工作，并使用从ToolBar内部的URI获取的项创建一个plugin.xml

IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
IMenuService menuService = window.getService(IMenuService.class);
ToolBarManager manager = new ToolBarManager(new ToolBar(body, SWT.BORDER));
menuService.populateContributionManager(manager, "toolbar:org.eclipse.ui.main.ribbon");
manager.update(true);

我将代码片段放入一个IContributionItem中，它就停止工作了。有一个例外：

org.eclipse.e4.core.di.InjectionException: org.eclipse.swt.SWTException: Widget is disposed
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:68)
    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:898)
    at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:121)
    at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:345)
    at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:278)
    at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:186)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:107)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:73)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:50)
    at org.eclipse.e4.ui.workbench.renderers.swt.ToolControlContribution.createControl(ToolControlContribution.java:58)
    at org.eclipse.jface.action.ControlContribution.fill(ControlContribution.java:101)
    at org.eclipse.jface.action.ToolBarManager.update(ToolBarManager.java:343)
    at org.eclipse.e4.ui.workbench.renderers.swt.ToolBarManagerRenderer.subscribeTopicUpdateToBeRendered(ToolBarManagerRenderer.java:212)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
Caused by: org.eclipse.swt.SWTException: Widget is disposed
    at org.eclipse.swt.SWT.error(SWT.java:4491)
    at org.eclipse.swt.SWT.error(SWT.java:4406)
    at org.eclipse.swt.SWT.error(SWT.java:4377)
    at org.eclipse.swt.widgets.Widget.error(Widget.java:482)
    at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:354)
    at org.eclipse.swt.widgets.Widget.addDisposeListener(Widget.java:224)
    at org.eclipse.e4.ui.workbench.renderers.swt.ToolBarManagerRenderer.addCleanupDisposeListener(ToolBarManagerRenderer.java:420)
    at org.eclipse.e4.ui.workbench.renderers.swt.ToolBarManagerRenderer.processContribution(ToolBarManagerRenderer.java:406)
    at org.eclipse.ui.internal.menus.WorkbenchMenuService.populateContributionManager(WorkbenchMenuService.java:342)
    at org.eclipse.ui.internal.menus.SlaveMenuService.populateContributionManager(SlaveMenuService.java:90)
    at org.eclipse.ui.internal.menus.SlaveMenuService.populateContributionManager(SlaveMenuService.java:81)
    at org.acme.project.RibbonContribution.createControl(RibbonContribution.java:29)

据我所知，没有控制(为什么要控制？)异常将在应用程序启动时抛出)。

控制台还显示了以下消息：

！消息无法从包'87‘创建类'org.eclipse.ui.internal.menus.CompatibilityWorkbenchWindowControlContribution’ 在分派事件topic=org/eclipse/e4/ui/model/ui/UIElement/visible/SET {ChangedElement=org.eclipse.e4.ui.model.application.ui.menu.impl.ToolControlImpl@b606cb6时消息异常(elementId: org.eclipse.core.internal.registry.ConfigurationElementHandle@3f，标记: null，contributorURI: null) (小部件: null，呈现器: org.eclipse.e4.ui.workbench.renderers.swt.ToolControlRenderer@5b9396d3，toBeRendered: true，onTop: false，可见: true，containerData: null，( bundleclass://org.eclipse.ui.workbench/org.eclipse.ui.internal.menus.CompatibilityWorkbenchWindowControlContribution，对象: null)，Widget=null，AttName=visible，NewValue=true，EventType=SET，OldValue=false}到处理程序org.eclipse.e4.ui.internal.di.UIEventObjectSupplier$UIEventHandler@24c8d8be

怎么一回事？我该怎么解决这个问题？如何将ToolBar添加到IContributionItem中

Answer 1

我用NPE in HandledContributionItem.canExecuteItem回答了这个问题

WorkbenchMenuService.populateContributionManager(ContributionManager, String)接受当前活动工作台部分来注册菜单。因此，在本例中，工具栏没有要创建的活动部分。

我找到了一个解决方法来修复这个巨大的E4错误。必须用以下行替换对populateContributionManager的调用：

    final MPart part = getSite().getService(MPart.class);
    String menuLocation = "toolbar:org.acme.menu";

    if (menuService instanceof WorkbenchMenuService) {
        ((WorkbenchMenuService) menuService).populateContributionManager(part, manager, menuLocation);
    } else if (menuService instanceof SlaveMenuService) {
        ((SlaveMenuService) menuService).populateContributionManager(part, manager, menuLocation);
    } else
        throw new UnsupportedOperationException("Do not know how to handle " + menuService); //$NON-NLS-1$