如何重置Eclipse e4 RCP应用程序的透视图?

问题描述

在application.e4xmi文件中构建透视图后，我无法通过调用IWorkbenchPage.resetPerspective()来重置透视图.

After building a perspective in application.e4xmi file, I am unable to reset perspective by calling IWorkbenchPage.resetPerspective().

推荐答案

我认为这可以节省其他人的时间，也可以自己记录下来.

I thought this may save others some time, as well as document it for myself.

重置e4透视图的技巧如下(假定是基本应用程序，带有PerspectiveStack元素的e4xmi):

The trick to being able to reset an e4 perspective is as follows (assumes a basic application.e4xmi with PerspectiveStack element):

1. 在application.e4xmi文件中，在"Application/TrimmedWindow"节点下找到PerspectiveStack.记录/设置其ID.
2. 在Eclipse 4模型编辑器中，将您的Perspective从您的PerspectiveStack下方拖动到Application/Snippets. (这将使您的视角ID在IPerspectiveRegistry中注册，并提供原始状态.)

3. 创建新的CopyPerspectiveSnippetProcessor.这将在启动时将您的代码片段中的透视图复制到您的PerspectiveStack中.这样一来，您就不必在e4xmi文件中维护每个透视图元素的两个副本.

1. In your application.e4xmi file, locate your PerspectiveStack under your Application/TrimmedWindow node. Record/set its ID.
2. In Eclipse 4 Model Editor, drag your Perspective(s) from underneath your PerspectiveStack to Application/Snippets. (This will cause your perspective IDs to register with IPerspectiveRegistry, and provide a pristine state).

3. Create new CopyPerspectiveSnippetProcessor. This will copy the perspectives in your snippets to your PerspectiveStack on startup. This makes it so you don't have to maintain two copies of each perspective element in your e4xmi file.

package com.example.application.processors;

import org.eclipse.e4.core.di.annotations.Execute;
import org.eclipse.e4.ui.model.application.MApplication;
import org.eclipse.e4.ui.model.application.ui.MUIElement;
import org.eclipse.e4.ui.model.application.ui.advanced.MPerspective;
import org.eclipse.e4.ui.model.application.ui.advanced.MPerspectiveStack;
import org.eclipse.e4.ui.workbench.modeling.EModelService;

/**
 * Copies all snippet perspectives to perspective stack called "MainPerspectiveStack" In order to register/reset perspective and not have to sync two copies in
 * e4xmi.
 *
 */
public class CopyPerspectiveSnippetProcessor {
    private static final String MAIN_PERSPECTIVE_STACK_ID = "MainPerspectiveStack";

    @Execute
    public void execute(EModelService modelService, MApplication application) {
        MPerspectiveStack perspectiveStack = (MPerspectiveStack) modelService.find(MAIN_PERSPECTIVE_STACK_ID, application);

        // Only do this when no other children, or the restored workspace state will be overwritten.
        if (!perspectiveStack.getChildren().isEmpty())
            return;

        // clone each snippet that is a perspective and add the cloned perspective into the main PerspectiveStack
        boolean isFirst = true;
        for (MUIElement snippet : application.getSnippets()) {
            if (snippet instanceof MPerspective) {
                MPerspective perspectiveClone = (MPerspective) modelService.cloneSnippet(application, snippet.getElementId(), null);
                perspectiveStack.getChildren().add(perspectiveClone);
                if (isFirst) {
                    perspectiveStack.setSelectedElement(perspectiveClone);
                    isFirst = false;
                }
            }
        }
    }
}

将您的CopyPerspectiveSnippetProcess注册到您的plugin.xml文件中.

Register your CopyPerspectiveSnippetProcess into your plugin.xml file.

<extension id="MainAppModel" point="org.eclipse.e4.workbench.model">
    <processor beforefragment="false" class="com.example.application.processors.CopyPerspectiveSnippetProcessor"/>
</extension>

将透视图重置为正常状态.您还需要将透视图堆栈和当前透视图设置为可见，因为有时可以将它们设置为不可见.样本处理程序可能看起来像:

Reset the perspective as normal. You will also want to set the perspective stack and the current perspective to visible, as these can sometimes be set to invisible. A sample handler might look like:

import org.eclipse.e4.core.di.annotations.Execute;
import org.eclipse.e4.ui.model.application.MApplication;
import org.eclipse.e4.ui.model.application.ui.advanced.MPerspectiveStack;
import org.eclipse.e4.ui.workbench.modeling.EModelService;
import org.eclipse.ui.PlatformUI;

public class ResetPerspectiveHandler {
    private static final String MAIN_PERSPECTIVE_STACK_ID = "MainPerspectiveStack";

    @Execute
    public void execute(EModelService modelService, MApplication application) {
         MPerspectiveStack perspectiveStack = (MPerspectiveStack) modelService.find(MAIN_PERSPECTIVE_STACK_ID, application);
         PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().resetPerspective();
         perspectiveStack.getSelectedElement().setVisible(true);
         perspectiveStack.setVisible(true);
    }
}

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