objectContribution 和 command 之间缺少链接

Missing link between objectContribution and command(objectContribution 和 command 之间缺少链接)

问题描述

当使用 objectContribution 元素(它是 org.eclipse.ui.popupMenus-扩展点)，我经常(实际上总是)想委托给一些命令而不是自己实现一些动作(因为通常，我已经实现了命令和处理程序).我通过使用 ICommandService 和 IHandlerService 来做到这一点，但感觉应该有一种方法可以以编程方式实现这一点.我可以使用 viewerContribution 而不是 objectContribution，但是只有在选择某些对象类型时，我才会失去显示菜单条目的简单方法.理想情况下，我想使用我的处理程序已经存在的启用检查来应用到 objectContribution 定义的菜单条目.

When using the objectContribution-element (which is part of the org.eclipse.ui.popupMenus-extension point), I often (practically always) want to delegate to some command instead of implementing some action myself (since usually, I have the command and a handler already implemented). I'm doing this by using ICommandService and IHandlerService, but it feels there should be a way to achieve this programmatically. I could use viewerContribution instead of objectContribution, but then I would lose the easy way of showing the menu entry only when certain object types are selected. Ideally, I would like to use the enablement-checks that already exist for my handlers to apply to the menu entry defined by the objectContribution.

推荐答案

好的，这就是我所缺少的:我不得不使用 org.eclipse.ui.popupMenus 扩展点而不是使用 org.eclipse.ui.menus-带有 menuContribution 的扩展点，其 locationURI-属性指向 popup:org.eclipse.ui.popup.any?after=additions.这个 menuContribution 可以包含一个 command-元素(实现直接绑定到现有命令的目标)，并且这个 command-元素的 visibleWhen-元素可以通过 checkEnabled-属性绑定到绑定命令的处理程序的激活状态(实现只有在启用命令处理程序满足).

Ok, here's what I was missing: instead of using the org.eclipse.ui.popupMenus-extension point, I had to use the org.eclipse.ui.menus-extension point with a menuContribution that has its locationURI-attribute pointing to popup:org.eclipse.ui.popup.any?after=additions. This menuContribution can include a command-element (achieving the goal of binding directly to an existing command), and this command-element´s visibleWhen-element can be bound to the activation status of the bound command's handler via the checkEnabled-attribute (achieving the goal of having the popup-menu entry visible only when the enablement for the command handler is satisfied).

不好的是 org.eclipse.ui.menus-extension 点的文档指出 org.eclipse.ui.popupMenus-extension 点是被认为已弃用，但 org.eclipse.ui.popupMenus 的文档没有提及这一事实.

What's bad is that the documentation of the org.eclipse.ui.menus-extension point states that the org.eclipse.ui.popupMenus-extension point is to be considered deprecated, but the documentation of org.eclipse.ui.popupMenus does not mention this fact.

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