想建一个Report Editor,只显示Preview
不像一般的Report Editor那样有Layout, Master Page,Script, Preview等多页编辑器

以下是我的plugin.xml代码,问题出在如果只设Preview一个FormPage,出不了图,必须设两个FormPage,然后运行从Layout点Preview才能正常出图.不知道什么原因,希望大家帮帮我

<extension
point="org.eclipse.ui.editors">
<editor
class="org.eclipse.birt.report.designer.ui.editors.ReportEditorProxy"
icon="icons/report.gif"
id="com.ingres.advisor.Editor"
name="Report Editor">
</editor>
</extension>
<extension
point="org.eclipse.birt.report.designer.ui.editors.multiPageEditorContributor">
<targetEditor
targetEditorId="com.ingres.advisor.Editor">
<formPage
class="org.eclipse.birt.report.designer.ui.editors.pages.ReportLayoutEditorFormPage"
id="com.ingres.advisor.layout"
visible="true"
displayName="%layout">
</formPage>
<formPage
class="org.eclipse.birt.report.designer.ui.preview.editors.ReportPreviewFormPage"
id="com.ingres.advisor.preview"
visible="true"
displayName="%preview">
</formPage>
</targetEditor>
</extension>