Posted on 2008-01-08 10:27
Raul Gong 阅读(1887)
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eclipse
在制作eclipse插件的时候，时常需要对已经存在的视图做一些扩展，例如在project explorer中增加一个右键菜单，或者需要获取outline中当前选中项，等等。而这些操作的前提，是获取这些视图的id，然后通过获取视图的语句获取到视图，并进行下一步操作。
例如：如果是在view中：
IViewPart part = getViewSite().getPage().findView("org.eclipse.ui.views.ContentOutline");
如果是在action中：
IViewPart part = Plugin.getDefault().getWorkbench().getActiveWorkbenchWindow().getActivePage().findView("org.eclipse.ui.views.ContentOutline");
可见获取到视图的id是很重要的。如何获取id呢，有很多方法，我觉得比较常用的是以下两种：
1.通过手动查找目标视图所在的插件的plugin.xml中对改视图的定义，获得视图id。
描述：我觉得这是最保险的办法，因为所有的视图都必定有一个plugin.xml定义，但是找到这个plugin.xml还是需要一些操作，可能会耗费一些时间。
步骤：
a.点击“工具栏”－>“Search”－>“Search”，或者热键“ctrl+h”。选“ Plugin Search”。
b.Search for 选"Extention Point"，Limit to 选“References”，External Scope 选“Enabled Plug-ins only”。
c.下面的scope选“Worksapaces”。
d.上面的Search String框填入我们要搜索的插件的扩展点的名字，这里我们要找视图插件，所以填入：org.eclipse.ui.views
e.点击search以后，在底部Search视图内列出很多搜索结果，任意选中一个，双击，可以看到editor内打开了该plugin.xml，选中编辑器底部的Extentions，用图形化的方式来查看会更快捷。
f.可以看到该插件使用的扩展点已经以列表的形式列出，我们查找的org.eclipse.ui.views扩展点也已经选中，展开选中的扩展点，可以看到它实现了哪些view，点击某一个，可以在页面右边看到该视图的详细信息，第一项即是视图的id。
我们无法知道目标视图在搜索结果中的哪个plugin中，所以可能会耗费一些时间，建议在查看搜索结果时，通过对视图的分类分析，确定一个大概范围再进行查看。
同时，用这种方法也可以查找其他扩展点的实现插件。
2.通过代码直接读出该视图的id。
描述：通过这种方法，可以直接用鼠标点击某个你想知道的视图，控制台会打印出该视图的id和所属插件的id。
步骤：
a.通过插件向导新建一个插件，并使用Available Templates中的Plugin with a view模板，点finish。
b.对自动创建的SampleView代码进行修改，修改结果如下。其中主要步骤有三个：实现IPartListener2接口，编写isActivePart()方法，调用isActivePart()方法。
package com.raul.learn.sampleview.views;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.part.*;
import org.eclipse.jface.viewers.*;
import org.eclipse.swt.graphics.Image;
import org.eclipse.jface.action.*;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.ui.*;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.SWT;
import com.raul.learn.sampleview.Activator;
/** *//**
* This sample class demonstrates how to plug-in a new
* workbench view. The view shows data obtained from the
* model. The sample creates a dummy model on the fly,
* but a real implementation would connect to the model
* available either in this or another plug-in (e.g. the workspace).
* The view is connected to the model using a content provider.
* <p>
* The view uses a label provider to define how model
* objects should be presented in the view. Each
* view can present the same model objects using
* different labels and icons, if needed. Alternatively,
* a single label provider can be shared between views
* in order to ensure that objects of the same type are
* presented in the same way everywhere.
* <p>
*/
public class SampleView extends ViewPart implements IPartListener2
{
private TableViewer viewer;
private Action action1;
private Action action2;
private Action doubleClickAction;
/**//*
* The content provider class is responsible for
* providing objects to the view. It can wrap
* existing objects in adapters or simply return
* objects as-is. These objects may be sensitive
* to the current input of the view, or ignore
* it and always show the same content
* (like Task List, for example).
*/
class ViewContentProvider implements IStructuredContentProvider {
public void inputChanged(Viewer v, Object oldInput, Object newInput) {
}
public void dispose() {
}
public Object[] getElements(Object parent) {
return new String[] { "One", "Two", "Three" };
}
}
class ViewLabelProvider extends LabelProvider implements ITableLabelProvider {
public String getColumnText(Object obj, int index) {
return getText(obj);
}
public Image getColumnImage(Object obj, int index) {
return getImage(obj);
}
public Image getImage(Object obj) {
return PlatformUI.getWorkbench().
getSharedImages().getImage(ISharedImages.IMG_OBJ_ELEMENT);
}
}
class NameSorter extends ViewerSorter {
}
/** *//**
* The constructor.
*/
public SampleView() {
Activator.getDefault().getWorkbench().getActiveWorkbenchWindow()
.getActivePage().addPartListener(this);
}
@Override
public void dispose() {
// TODO Auto-generated method stub
Activator.getDefault().getWorkbench().getActiveWorkbenchWindow()
.getActivePage().removePartListener(this);
super.dispose();
}
/** *//**
* This is a callback that will allow us
* to create the viewer and initialize it.
*/
public void createPartControl(Composite parent) {
viewer = new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
viewer.setContentProvider(new ViewContentProvider());
viewer.setLabelProvider(new ViewLabelProvider());
viewer.setSorter(new NameSorter());
viewer.setInput(getViewSite());
makeActions();
hookContextMenu();
hookDoubleClickAction();
contributeToActionBars();
}
private void hookContextMenu() {
MenuManager menuMgr = new MenuManager("#PopupMenu");
menuMgr.setRemoveAllWhenShown(true);
menuMgr.addMenuListener(new IMenuListener() {
public void menuAboutToShow(IMenuManager manager) {
SampleView.this.fillContextMenu(manager);
}
});
Menu menu = menuMgr.createContextMenu(viewer.getControl());
viewer.getControl().setMenu(menu);
getSite().registerContextMenu(menuMgr, viewer);
}
private void contributeToActionBars() {
IActionBars bars = getViewSite().getActionBars();
fillLocalPullDown(bars.getMenuManager());
fillLocalToolBar(bars.getToolBarManager());
}
private void fillLocalPullDown(IMenuManager manager) {
manager.add(action1);
manager.add(new Separator());
manager.add(action2);
}
private void fillContextMenu(IMenuManager manager) {
manager.add(action1);
manager.add(action2);
// Other plug-ins can contribute there actions here
manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
}
private void fillLocalToolBar(IToolBarManager manager) {
manager.add(action1);
manager.add(action2);
}
private void makeActions() {
action1 = new Action() {
public void run() {
showMessage("Action 1 executed");
}
};
action1.setText("Action 1");
action1.setToolTipText("Action 1 tooltip");
action1.setImageDescriptor(PlatformUI.getWorkbench().getSharedImages().
getImageDescriptor(ISharedImages.IMG_OBJS_INFO_TSK));
action2 = new Action() {
public void run() {
showMessage("Action 2 executed");
}
};
action2.setText("Action 2");
action2.setToolTipText("Action 2 tooltip");
action2.setImageDescriptor(PlatformUI.getWorkbench().getSharedImages().
getImageDescriptor(ISharedImages.IMG_OBJS_INFO_TSK));
doubleClickAction = new Action() {
public void run() {
ISelection selection = viewer.getSelection();
Object obj = ((IStructuredSelection)selection).getFirstElement();
showMessage("Double-click detected on "+obj.toString());
}
};
}
private void hookDoubleClickAction() {
viewer.addDoubleClickListener(new IDoubleClickListener() {
public void doubleClick(DoubleClickEvent event) {
doubleClickAction.run();
}
});
}
private void showMessage(String message) {
MessageDialog.openInformation(
viewer.getControl().getShell(),
"Sample View",
message);
}
/** *//**
* Passing the focus request to the viewer's control.
*/
public void setFocus() {
viewer.getControl().setFocus();
}
@Override
public void partActivated(IWorkbenchPartReference partRef) {
// TODO Auto-generated method stub
isActivePart();
}
@Override
public void partBroughtToTop(IWorkbenchPartReference partRef) {
// TODO Auto-generated method stub
}
@Override
public void partClosed(IWorkbenchPartReference partRef) {
// TODO Auto-generated method stub
}
@Override
public void partDeactivated(IWorkbenchPartReference partRef) {
// TODO Auto-generated method stub
}
@Override
public void partHidden(IWorkbenchPartReference partRef) {
// TODO Auto-generated method stub
}
@Override
public void partInputChanged(IWorkbenchPartReference partRef) {
// TODO Auto-generated method stub
}
@Override
public void partOpened(IWorkbenchPartReference partRef) {
// TODO Auto-generated method stub
}
@Override
public void partVisible(IWorkbenchPartReference partRef) {
// TODO Auto-generated method stub
}
private void isActivePart() {
IWorkbenchPart part = getViewSite().getPage().getActivePart();
//return part != null && part.equals(this);
System.out.println(part.getSite().getId());
part.getSite().getPluginId();
}
}
然后调插件，在运行环境中调出该视图，接着当你用鼠标点击你想知道的视图时，在开发环境中的控制台，就会打印出该视图的id以及所属插件的id。