工作记录5月9日开始（不断更新中）

2006年5月9日
讨论了关于gmf的一些feature
2006年5月14日
1．阅读文章“Learn how to implement the Command pattern in Java ”
http://www.javaworld.com/javaworld/javatips/jw-javatip68.html
该文章主要讲了设计基于java语言特性的Command框架设计。

figure 1 关于Receiver和Invoker交互关系的序列图
The key idea here is that the concrete command registers itself with the Invoker and the Invoker calls it back, executing the command on the Receiver. the Command pattern completely decouples the object that invokes the operation  from the ones having the knowledge to perform it . This gives us a lot of flexibility: the object issuing a request must know only how to issue it; it doesn't need to know how the request will be carried out.
2006年5月15日

在eclipse newsgroup里面看到这样一个提问，也许对我们的项目有帮助：

How to call "Arrange all" during editor starts up?
When using ecore example editor to visualize ecore model, the diagram does not look nice when editor is up. The connections pass through the figures and very hard to read. Is there a way to invoke "Arrange all" function programmatically when editor is starting ?  Any help will be greatly appreciated.

答曰：
Never mind. I found a way to do this by sending an ArrangeRequest to diagram editpart in editor's initializeGraphicalViewer(). Hope this will help someone with similar question :)

Note：
虽然说的不是太清楚，但是总算觉得有法可依了！

2006年5月19日
console窗口类

org.eclipse.ui.console.MessageConsole

A console that displays messages. A message console may have one or more streams connected to it (MessageConsoleStream). Text written to streams is buffered and processed in a Job by the console's document partitioner.

Clients may instantiate this class; not intended to be subclassed.

org.eclipse.ui.dialogs.ListDialog

A dialog that prompts for one element out of a list of elements. Uses IStructuredContentProvider to provide the elements and ILabelProvider to provide their labels.

实现：

 1  ListDialog dialog  =   new  ListDialog(shell);
 2              dialog.setInput(status);
 3              dialog.setTitle(title);
 4              dialog.setContentProvider( new  IStructuredContentProvider() {
 5                   public   void  dispose() {
 6                       //  nothing to dispose
 7                  }
 8 
 9                   public  Object[] getElements(Object inputElement) {
10                       if  (status  !=   null   &&  status.isMultiStatus()  &&  status  ==  inputElement) {
11                           return  status.getChildren();
12                      }  else   if  (status  !=   null   &&  status  ==  inputElement) {
13                           return   new  Object[] {status};
14                      }
15                       return   new  Object[ 0 ];
16                  }
17 
18                   public   void  inputChanged(Viewer viewer, Object oldInput, Object newInput) {
19                       //  Do nothing.
20                  }
21              });
22              dialog.setLabelProvider( new  LabelProvider() {
23                   public  String getText(Object element) {
24                       if  (element  instanceof  IStatus) {
25                           return  ((IStatus)element).getMessage();
26                      }
27                       return   null ;
28                  }
29              });
30              dialog.setBlockOnOpen( true );
31              dialog.setMessage(ValidationMessages.BatchValidationDelegate_errorMessage);
32              
33               if  (ListDialog.OK  ==  dialog.open()) {
34                  Set errorSelections  =   new  HashSet();
35                   if  ( ! status.isMultiStatus()) {
36                      IConstraintStatus cstatus  =  (IConstraintStatus)status;
37                      errorSelections.add(cstatus.getTarget());
38                  }  else  {
39                      IStatus[] children  =  status.getChildren();
40                       for  ( int  i  =   0 ; i < children.length; i ++ ) {
41                          IConstraintStatus cstatus  =  (IConstraintStatus)children[i];
42                          errorSelections.add(cstatus.getTarget());
43                      }
44                  }
45                  editor.setSelectionToViewer(errorSelections);
46              }