Question

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。

Answer 1

我认为这可能会为其他人节省一些时间，并为自己记录。

能够重置e4透视图的技巧如下（假设使用PerspectiveStack元素的基本application.e4xmi）：

在application.e4xmi文件中，在Application / TrimmedWindow节点下找到PerspectiveStack。记录/设置其ID。
在Eclipse 4模型编辑器中，将Perspective（透视图）从PerspectiveStack下方拖到Application / Snippets。（这将导致您的透视ID向IPerspectiveRegistry注册，并提供原始状态。）

创建新的CopyPerspectiveSnippetProcessor。这将在启动时将片段中的透视图复制到PerspectiveStack。这使得您无需在e4xmi文件中维护每个透视元素的两个副本。

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CopyPerspectiveSnippetProcess注册到plugin.xml文件中。

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

正常重置视角。您还需要将透视图堆栈和当前透视图设置为可见，因为这些有时可以设置为不可见。示例处理程序可能如下所示：

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);
    }
}

Answer 2

重置透视图（当您在不清理工作空间的情况下为e4应用程序午餐时，将其他透视图切换为感知角度时）。

第1步：在应用程序级别的模型片段中添加一个附件。

步骤2：创建加载项类并实现EventHandler

第3步：在类中添加以下代码。

public class ResetPrespectiveAddOn implements EventHandler {

private static final String MY_PERSPECTIVE_ID = "myPrespectiveId";

@Inject
private IEventBroker broker;

@PostConstruct
public void loadPrespective() {

    broker.subscribe(UIEvents.ElementContainer.TOPIC_SELECTEDELEMENT, this);
}

@SuppressWarnings("restriction")
@Override
public void handleEvent(Event event) {

    //UIEvents.EventTags.ELEMENT is trigger  for all UI activity
    Object property = event.getProperty(UIEvents.EventTags.ELEMENT);
    if (!(property instanceof PerspectiveStackImpl)) {
        return;

    }

    // Reset perspective logic .
    IEclipseContext serviceContext = E4Workbench.getServiceContext();
    final IEclipseContext appContext = (IEclipseContext) serviceContext.getActiveChild();
    EModelService modelService = appContext.get(EModelService.class);
    MApplication application = serviceContext.get(MApplication.class);
    MWindow mWindow = application.getChildren().get(0);

    PerspectiveStackImpl perspectiveStack = (PerspectiveStackImpl) property;
    List<MPerspective> children = perspectiveStack.getChildren();
    for (MPerspective myPerspective : children) {
        if (myPerspective.getElementId().equals(MY_PERSPECTIVE_ID)) {

            //find active perspective
            MPerspective activePerspective = modelService.getActivePerspective(mWindow);
            if(activePerspective.getElementId().equals(MY_PERSPECTIVE_ID))

            //Reseting perspective  e3 way 
            PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().resetPerspective();


            // till now there is no direct e4 way to reset perspective 
            // but u can Add and remove e4 perspective with this code code              
            EPartService partService = serviceContext.get(EPartService.class);
            MPerspectiveStack perspectiveStack = (MPerspectiveStack) (MElementContainer<?>) activePerspective.getParent();
            int indexOf = perspectiveStack.getChildren().indexOf(activePerspective);
            perspectiveStack.getChildren().remove(indexOf);

            perspectiveStack.getChildren().add(myPerspective);
            partService.switchPerspective(myPerspective);
        }   
    }
}}

如何重置Eclipse e4 RCP应用程序的透视图？

2 个答案: