在Eclipse RCP中显示视图时传递参数 [英] Passing parameters while showing a view in Eclipse RCP

问题描述

我正在创建eclipse RCP应用程序，并且在显示视图时我遇到了传递参数。
作为第一种方法，我尝试在View2中的View2中设置一个静态变量，并打开该视图（如下所示）。有用。

I am creating eclipse RCP application and I am stuck with passing parameter while showing a view. As the first approach, I tried setting a static variable in View2 from View1 and opened that view (as below). It works.

IWorkbenchPage activePage = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();               
String viewIdToClose = studentListView.ID;
IViewPart viewToClose = activePage.findView(viewIdToClose);
TableItem item = studentTable.getItem(studentTable.getSelectionIndex());
String text = item.getText(ListViewConstants.TABLE_COLUMN_ONE);
activePage.hideView(viewToClose);
try {
    String viewIdToOpen = StudentReview.ID;
    StudentReview.userId = text;
     activePage.showView(viewIdToOpen);                 
} catch (PartInitException e) {...}

由于这似乎不做一个很好的做法，我按照以下链接（接受的答案）中提到的建议进行尝试。
将参数传递给视图
。在这种方法中，我们只能在显示视图后传递参数。

As this doesn't seem to be a good approach, I tried as per the suggestion mentioned in the below link(accepted answer). Passing parameters to the view . In this approach, we can pass parameters only after showing the view.

但是我遇到的问题是，打开的视图应该在调用时选择行的值showView（）ie，我想根据View 1的选择填充View 2中的参数。
有什么办法可以实现吗？使用PULL而不是PUSH方法好吗？
任何建议是赞赏。
谢谢!!!

But the issue I have is, the view to be opened should have the value from selected row while calling showView() i.e, I want to populate the parameters in View 2 based on View 1's selection. Is there any way to achieve this? Is it good to use PULL instead of PUSH approach? Any suggestion is appreciated. Thanks!!!

更新1：
将参数传递给视图
接口：

UPDATE 1: Approach mentioned in Passing parameters to the view Interface:

public interface ICommunicationView extends IViewPart{
   public void accept(Object parameter);
}

调用accept（）：

Calling accept():

IWorkbenchPage activePage = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
String viewIdToClose = StudentListView.ID;
IViewPart viewToClose = activePage.findView(viewIdToClose);
TableItem item = studentTable.getItem(studentTable.getSelectionIndex());
String text = item.getText(ListViewConstants.TABLE_COLUMN_ONE);
activePage.hideView(viewToClose);
try {
   String viewIdToOpen = StudentReview.ID;
   ICommunicationView viewToOpen = (ICommunicationView) activePage.showView(viewIdToOpen);
   viewToOpen.accept(text);//Sending userId to Review view
} catch (PartInitException e) { ... }

StudentReviewView：

StudentReviewView:

private String studentId;
//getters and setters
@Override
public void accept(Object parameter) {
  setStudentId(parameter.toString());
}

public void createPartControl(final Composite parent) {
   ...
  System.out.println("Student Id" + this.getStudentId());    
}

将Student Id打印为null。

It prints Student Id as null.

我缺少一些明显的东西？

Am I missing something obvious?

谢谢！

推荐答案

当 activePage.showView（viewIdToOpen）打开视图时，平台调用 createPartControl C $ C>。所以不要在 createPartControl 上填充你的字段。在 setStudentId 被调用时执行。

Platform calls createPartControl when the view is opened by activePage.showView(viewIdToOpen). So don't populate your fields on createPartControl. Do it when setStudentId is called.

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