Re: [platform-ui-dev] Restore a workbenchpage with an external memento.x

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Re: [platform-ui-dev] Restore a workbenchpage with an external memento.xml without closing eclipse 3.1

From: Nick Edgar <Nick_Edgar@xxxxxxxxxx>
Date: Thu, 26 Jan 2006 13:43:23 -0500
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Christoph,

Please post such questions to the newsgroups (e.g. the RCP newsgroup) 
instead of the developer mailing lists.
http://wiki.eclipse.org/index.php/Rich_Client_Platform#Newsgroups

Thanks,
Nick




Christoph Küpferle <c.kuepferle@xxxxxxx> 
Sent by: platform-ui-dev-bounces@xxxxxxxxxxx
01/26/2006 11:55 AM
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Subject
[platform-ui-dev] Restore a workbenchpage with an external memento.xml 
without closing eclipse 3.1






Hello everybody,

I am having a problem concerning a restore of a workbench page.

Reading the bug track from Bug 85373 - [RCP] Missing save/restore 
capabilities of workbench state 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=85373

I' ve got some insight concerning the concept of using the restore 
mechanism in eclipse 3.1 and the ideas for following releases. I am not 
sure if I encountered a bug or if my approach is wrong.

Use Case:
I want to switch Perspectives, during runtime and have the page set 
(restored) to a predefined state saved previously in a XMLMemento (same 
format as the workbech.xml in 
../.metadata/.plugins/org.eclipse.ui.workbench/ ) coming from somewhere 
in my file system. The views and editors are opened correctly according 
to the memento, the only problem I have is that every time I call 
WorkbenchPage.restoreState( IMemento myCustomMemento), the editor area 
is split in half (this is definitely not in the memento), where the one 
half is correctly stacked with the right editors, but the other half is 
just painted grey. If I randomly move the opened editors around the grey 
areas disappears suddenly and the page looks find now. Could this be an 
event problem or do I use the frame work in the wrong way.

the following method performs the switch to another perspective and its 
population with a predefined state from the Memento:

public static boolean nextPerspective(String urlWithPageState, String 
perspectiveID, IWorkbenchPage activePage)
{

        final IWorkbench workbench = PlatformUI.getWorkbench();

        final IPerspectiveRegistry registry = 
workbench.getPerspectiveRegistry();

        try {

            XMLMemento memento = XMLMemento.createReadRoot(new 
FileReader( urlWithPageState));
            IMemento windowMemento = 
memento.getChild(IWorkbenchConstants.TAG_WINDOW);
            IMemento pageMemento = 
windowMemento.getChild(IWorkbenchConstants.TAG_PAGE);

           IPerspectiveDescriptor realDesc = 
registry.findPerspectiveWithId(perspectiveID);
            IPerspectiveDescriptor oldPerspectiveDesc = 
activePage.getPerspective();
            activePage.closePerspective(oldPerspectiveDesc, true, false);

            ((WorkbenchPage) activePage).restoreState(pageMemento, null);
            activePage.setPerspective(realDesc);
            activePage.resetPerspective();

        } catch (IOException e) {
            e.printStackTrace();
            handleException(e, page);
            return false;
        } catch (WorkbenchException e) {
            e.printStackTrace();
            handleException(e, page);
            return false;
        }

        return true;
    }

XML Memento:

<?xml version="1.0" encoding="UTF-8"?>
<workbench version="2.0" progressCount="13">
<workbenchAdvisor/>
<window maximized="true" x="132" y="132" width="1024" height="768">
<fastViewData fastViewLocation="1024"/>
<perspectiveBar>
<itemSize x="160"/>
</perspectiveBar>
<coolbarLayout locked="0">
<coolItem id="group.file" itemType="typeGroupMarker"/>
<coolItem id="org.eclipse.ui.workbench.file" 
itemType="typeToolBarContribution" x="95" y="22"/>
<coolItem id="additions" itemType="typeGroupMarker"/>
<coolItem id="KalypsoDSSPlanerClient.actionSet" 
itemType="typeToolBarContribution" x="59" y="22"/>
<coolItem id="org.eclipse.debug.ui.launchActionSet" 
itemType="typeToolBarContribution" x="49" y="22"/>
<coolItem id="org.eclipse.search.searchActionSet" 
itemType="typeToolBarContribution" x="36" y="22"/>
<coolItem id="group.nav" itemType="typeGroupMarker"/>
<coolItem id="org.eclipse.ui.workbench.navigate" 
itemType="typeToolBarContribution" x="108" y="22"/>
<coolItem id="group.editor" itemType="typeGroupMarker"/>
<coolItem id="org.eclipse.ui.DefaultTextEditor" 
itemType="typeToolBarContribution" x="-1" y="-1"/>
<coolItem id="group.help" itemType="typeGroupMarker"/>
<coolItem id="org.eclipse.ui.workbench.help" 
itemType="typeToolBarContribution" x="-1" y="-1"/>
</coolbarLayout>
<page label="&lt;Unknown Label&gt; - Kalypso Planer-Client Phase 2" 
focus="true">
<editors>
<editorArea activeWorkbook="DefaultEditorWorkbook">
<info part="DefaultEditorWorkbook">
<folder expanded="2" appearance="1">
<presentation 
id="org.eclipse.ui.presentations.WorkbenchPresentationFactory">
<part id="0"/>
</presentation>
</folder>
</info>
<info part="org.eclipse.ui.internal.EditorStack@45f4ae" 
relative="DefaultEditorWorkbook" relationship="4" ratioLeft="335" 
ratioRight="336" ratio="0.49925485">
<folder expanded="2" appearance="1">
<presentation 
id="org.eclipse.ui.presentations.WorkbenchPresentationFactory">
<part id="0"/>
</presentation>
</folder>
</info>
</editorArea>
<editor title="phase2.txt" name="phase2.txt" 
id="org.eclipse.ui.DefaultTextEditor" tooltip="MyTestProject/phase2.txt" 
partName="phase2.txt" workbook="DefaultEditorWorkbook" activePart="true" 
focus="true" 
path="D:/eclipse3.1/runtime-workspace/MyTestProject/phase2.txt">
<input factoryID="org.eclipse.ui.part.FileEditorInputFactory" 
path="/MyTestProject/phase2.txt"/>
</editor>
<editor title="filelInFolder2.txt" name="filelInFolder2.txt" 
id="org.eclipse.ui.DefaultTextEditor" 
tooltip="MyTestProject/Folder2/filelInFolder2.txt" 
partName="filelInFolder2.txt" 
workbook="org.eclipse.ui.internal.EditorStack@45f4ae" focus="true" 
path="D:/eclipse3.1/runtime-workspace/MyTestProject/Folder2/filelInFolder2.txt">
<input factoryID="org.eclipse.ui.part.FileEditorInputFactory" 
path="/MyTestProject/Folder2/filelInFolder2.txt"/>
</editor>
</editors>
<views>
<view id="org.kalypso.dss.planerclient.view.browser" partName="Kalypso 
Browser">
<viewState url="file:///D:/TEMP/Perspectives/DssPlanerClient.htm">
<scrolbars/>
</viewState>
</view>
<view id="org.eclipse.ui.views.ResourceNavigator" partName="Navigator">
<viewState sorter="1" LINK_NAVIGATOR_TO_EDITOR="1">
<filters>
<filter element="*.class" isEnabled="false"/>
<filter element=".*" isEnabled="true"/>
</filters>
<expanded>
<element path="/MyTestProject"/>
<element path="/MyTestProject/Folder1"/>
<element path="/MyTestProject/Folder2"/>
</expanded>
<selection>
<element path="/MyTestProject/phase2.txt"/>
</selection>
</viewState>
</view>
</views>
<perspectives 
activePerspective="org.kalypso.dss.planerclient.perspectiv.phase.two" 
activePart="org.eclipse.ui.DefaultTextEditor">
<perspective version="0.016" editorAreaVisible="1" fixed="0">
<descriptor id="org.kalypso.dss.planerclient.perspectiv.phase.two" 
label="Kalypso Planer-Client Phase 2" 
class="org.kalypso.dss.planerclient.perspectives.KalypsoDssPlanerPhaseTwoClientPerspectiveFactory"/>
<alwaysOnActionSet id="org.eclipse.ui.cheatsheets.actionSet"/>
<alwaysOnActionSet id="org.eclipse.search.searchActionSet"/>
<alwaysOnActionSet 
id="org.eclipse.ui.edit.text.actionSet.openExternalFile"/>
<alwaysOnActionSet id="org.eclipse.ui.edit.text.actionSet.navigation"/>
<alwaysOnActionSet 
id="org.eclipse.ui.edit.text.actionSet.convertLineDelimitersTo"/>
<alwaysOnActionSet id="org.eclipse.ui.externaltools.ExternalToolsSet"/>
<alwaysOnActionSet id="KalypsoDSSPlanerClient.actionSet"/>
<alwaysOnActionSet id="org.eclipse.ui.actionSet.keyBindings"/>
<alwaysOnActionSet id="org.eclipse.update.ui.softwareUpdates"/>
<new_wizard_action id="org.eclipse.ui.wizards.new.folder"/>
<new_wizard_action id="org.eclipse.ui.wizards.new.file"/>
<view id="org.eclipse.ui.views.ResourceNavigator"/>
<view id="org.kalypso.dss.planerclient.view.browser"/>
<layout>
<mainWindow>
<info part="org.eclipse.ui.editorss"/>
<info part="stickyFolderRight" relative="org.eclipse.ui.editorss" 
relationship="2" ratioLeft="754" ratioRight="252" ratio="0.74950296" 
folder="true">
<folder expanded="2" appearance="2">
<page label="LabelNotFound" content="org.eclipse.help.ui.HelpView"/>
<page label="LabelNotFound" content="org.eclipse.ui.internal.introview"/>
<page label="LabelNotFound" 
content="org.eclipse.ui.cheatsheets.views.CheatSheetView"/>
</folder>
</info>
<info part="topRight" relative="org.eclipse.ui.editorss" 
relationship="2" ratioLeft="653" ratioRight="353" ratio="0.64910537" 
folder="true">
<folder activePageID="org.eclipse.ui.views.ResourceNavigator" 
expanded="2" appearance="2">
<page label="Navigator" content="org.eclipse.ui.views.ResourceNavigator"/>
<presentation 
id="org.eclipse.ui.presentations.WorkbenchPresentationFactory">
<part id="0"/>
</presentation>
</folder>
</info>
<info part="bottomRight" relative="org.eclipse.ui.editorss" 
relationship="4" ratioLeft="440" ratioRight="227" ratio="0.6596702" 
folder="true">
<folder activePageID="org.kalypso.dss.planerclient.view.browser" 
expanded="2" appearance="2">
<page label="Kalypso Browser" 
content="org.kalypso.dss.planerclient.view.browser"/>
<presentation 
id="org.eclipse.ui.presentations.WorkbenchPresentationFactory">
<part id="0"/>
</presentation>
</folder>
</info>
</mainWindow>
</layout>
</perspective>
</perspectives>
<navigationHistory/>
<stickyState/>
</page>
<workbenchWindowAdvisor/>
<actionBarAdvisor/>
</window>
<mruList>
<file factoryID="org.eclipse.ui.part.FileEditorInputFactory" 
id="org.eclipse.ui.DefaultTextEditor" name="filelInFolder2.txt" 
tooltip="MyTestProject/Folder2/filelInFolder2.txt">
<persistable path="/MyTestProject/Folder2/filelInFolder2.txt"/>
</file>
<file factoryID="org.eclipse.ui.part.FileEditorInputFactory" 
id="org.eclipse.ui.DefaultTextEditor" name="phase2.txt" 
tooltip="MyTestProject/phase2.txt">
<persistable path="/MyTestProject/phase2.txt"/>
</file>
<file factoryID="org.eclipse.ui.part.FileEditorInputFactory" 
id="org.eclipse.ui.DefaultTextEditor" name="fileInFolder1.txt" 
tooltip="MyTestProject/Folder1/fileInFolder1.txt">
<persistable path="/MyTestProject/Folder1/fileInFolder1.txt"/>
</file>
<file factoryID="org.eclipse.ui.part.FileEditorInputFactory" 
id="org.eclipse.ui.DefaultTextEditor" name="phase1.txt" 
tooltip="MyTestProject/phase1.txt">
<persistable path="/MyTestProject/phase1.txt"/>
</file>
</mruList>
</workbench>


This method is called from the LocationListener.changed(LocationEvent 
event) of my own BrowserViewer (extends ViewPart and decorates the 
eclipse BrowserViewer) which allows me to browse different perspectives 
with a custom state.

What do I miss here??? Your help is realy appreciated.

Cheers
Christoph

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References:
- [platform-ui-dev] Restore a workbenchpage with an external memento.xml without closing eclipse 3.1
  - From: Christoph Küpferle

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