Re: [ve-dev] Customised Swing layout manager

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Re: [ve-dev] Customised Swing layout manager

From: Joe Winchester <WINCHEST@xxxxxxxxxx>
Date: Fri, 9 Sep 2005 14:07:30 +0100
Delivered-to: ve-dev@eclipse.org
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Hi Rashmi,

Is there anything being written to the ErrorLog when you select your layout manager from the drop down list in the property sheet ? You can see this using the Show View>Error Log.

You have myPackage as being the package with the MyLayout and also with the MyLayoutPolicyFactory. The VE has two sides to it - one is the Eclipse IDE that runs the viewer and editor code into which the MyLayoutPolicyFactory should go. The other is the VM that the VE uses to create its JavaBeans and this is the one MyLayout should be in. The same packages are not shared between the two.

The user experience for your user should be that the MyLayout.class file is in the build path of their Java project. By default it won't be (because it's not part of the JFC classes) so your user must do something to add it. The way the VE tends to do this is with a classpath container, and the tutorial on http://www.eclipse.org/articles/Article-VE-Custom-Widget/customwidget.html shows how to create a container.

In your plugin you should keep separate the code that runs in the IDE and is part of your plugin (which includes MyLayoutPolicyFactory) and the code that runs in the VE's target VM. If you look at something like the org.eclipse.ve.swt plugin you will see separate source folders - one called ve_swt and one called vm_swt. Look also at the file proxy.jars that redirects the VE in develpment mode so where it looks for a .jar file on the target VM it instead looks inside the /bin folder in the workbench.

To see whether your code is working or not a good place to start would be to maually change a JPanel to use your layout manager (i.e. using the Java source code) and make sure this compiles. Then open the VE in debug mode and debug into the ContainerGraphicalEditPart and the method createLayoutEditPolicy() which will go down the path where it looks for the correct policy factory to use for the layout manager.

Best regards,

Joe Winchester

Please respond to Discussions people developing code for the Visual Editor project <ve-dev@xxxxxxxxxxx>

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To: "Discussions people developing code for the Visual Editor project" <ve-dev@xxxxxxxxxxx>
cc:
Subject: Re: [ve-dev] Customised Swing layout manager

Hi All,
On creating a custom LayoutManager.override, I have been able to get the new LayoutManager display name shown in list for layout property in the property editor . The code I used in the .override file is as below.
<?xml version="1.0" encoding="UTF-8"?>
<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:org.eclipse.ve.internal.jcm="http:///org/eclipse/ve/internal/jcm.ecore"
xmlns:org.eclipse.ve.internal.cde.decorators="http:///org/eclipse/ve/internal/cde/decorators.ecore"
xmlns:org.eclipse.jem.java="java.xmi" xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore"
xmlns:event="event.xmi">
<event:Add featureName="eAnnotations">
<addedEObjects xsi:type="ecore:EAnnotation"
source="org.eclipse.ve.LayoutInfo">
<details
key="org.eclipse.ve.internal.jfc.core.layoutManagerClass"
value="mypackage.MyLayout"/>
<details
key="org.eclipse.ve.internal.jfc.core.layoutManagerDisplayName"
value="MyLayout"/>
</addedEObjects>

</event:Add>
</xmi:XMI>

How do We know that the class MyLayout has been initialized and recognised the LayoutManager class by VE. I have tried adding breakpoints to my LayoutManager class and running VE in debug mode. I have not been able to trace the class as the breakpoints are not being recognised.

MyLayout.override file is as below

<?xml version="1.0" encoding="UTF-8"?>
<event:AddMany xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:org.eclipse.ve.internal.jcm="http:///org/eclipse/ve/internal/jcm.ecore" xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore"
xmlns:codeGenHelpers="platform:/plugin/org.eclipse.ve.java.core/overrides/codegenHelpers.ecore"
xmlns:event="event.xmi"
featureName="eAnnotations">
<addedEObjects xsi:type="org.eclipse.ve.internal.jcm:BeanDecorator">
<keyedValues xsi:type="ecore:EStringToStringMapEntry"
key="org.eclipse.ve.internal.jfc.core.layoutpolicyfactoryclassnamekey"
value="My_Plugin/mypackage.MyLayoutPolicyFactory"/>
</addedEObjects>
<addedEObjects xsi:type="codeGenHelpers:CodeGenHelperClass"
source="codegen.CodeGenHelperClass"
modelled="true"/>
</event:AddMany>

Breakpoint added to MyLayoutPolicyFactory are not being recognized while testing the plugin.Is there anything wrong in the above declaration?
How do I run eclipse 3.1 in debug mode to track the process of execution of the classes that are referenced in the .override files?

Thank You & Best Regards,
Rashmi Ramachandra

-----Original Message-----
From: ve-dev-bounces@xxxxxxxxxxx [mailto:ve-dev-bounces@xxxxxxxxxxx]On Behalf Of Peter Walker
Sent: Friday, August 26, 2005 9:00 PM
To: Discussions people developing code for the Visual Editor project
Subject: NL:Re: [ve-dev] Customised Swing layout manager

Rashmi,
To clarify about what override file to create, for SWT layouts use Layout.override, for AWT/Swing layouts, use LayoutManager.override.

Regards...

Peter Walker

Rich Kulp/Raleigh/IBM@IBMUS
Sent by: ve-dev-bounces@xxxxxxxxxxx

08/26/2005 09:50 AM

Please respond to
Discussions people developing code for the Visual Editor project

To	Discussions people developing code for the Visual Editor project <ve-dev@xxxxxxxxxxx>
cc
Subject	Re: [ve-dev] Customised Swing layout manager

Hi,

A little typo, to get your layout manager to show in the property sheet you create an override for Layout.override, not Container.override. You just create a new override, put the extension point in to pick it up as an override and add another annotation. See the Layout.override that already exists to see how to do that.

Rich

Joe Winchester <WINCHEST@xxxxxxxxxx>
Sent by: ve-dev-bounces@xxxxxxxxxxx

08/26/2005 08:24 AM

Please respond to
Discussions people developing code for the Visual Editor project

To	Discussions people developing code for the Visual Editor project <ve-dev@xxxxxxxxxxx>
cc
Subject	Re: [ve-dev] Customised Swing layout manager

Hi Rashmi,

The best way is to look at how this is done for a layout manager like, say, BorderLayout. There is a file BorderLayout.override and this defines the decorator for a factory, and the factory lets you control things like GEF edit policies (that you will need to build). Look at the existing factories and you should get a feel for how to do this.

To get your layout manager to appear in the drop down list of available layout managers in the property sheet look at Container.override. You could change the base file to add your own which would work OK for you, but better would be to have your own Container.override in your own plugin and defined your own layout manager.

If you need help understanding how to create a plugin and get started with .override try the Visual Editor tutorial on eclipse corner and the VE homepage.

Best regards and please keep us informed of how you get on,

Joe Winchester

Please respond to Discussions people developing code for the Visual Editor project <ve-dev@xxxxxxxxxxx>

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To: <ve-dev@xxxxxxxxxxx>
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Subject: [ve-dev] Customised Swing layout manager Hi all, I have implemented a swing layout manager along with the constraints class. I loaded it to the eclipse enviroment as a bundle in the plugin. Now when i use this layout in a visual class I am able to arrange the components by changing the constraints values from the source view. But i am unable to move the component on the design view(changing the constraints from the properties and design view) .Can you help me out to solve my layout poblem. Do i need to implement some a layout assistant that will interface with my layout manager and the visualeditor. Best Regards -Rashmi _______________________________________________ ve-dev mailing list ve-dev@xxxxxxxxxxx https://dev.eclipse.org/mailman/listinfo/ve-dev _______________________________________________ ve-dev mailing list ve-dev@xxxxxxxxxxx https://dev.eclipse.org/mailman/listinfo/ve-dev_______________________________________________ ve-dev mailing list ve-dev@xxxxxxxxxxx https://dev.eclipse.org/mailman/listinfo/ve-dev_______________________________________________ ve-dev mailing list ve-dev@xxxxxxxxxxx https://dev.eclipse.org/mailman/listinfo/ve-dev

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- Re: [ve-dev] Customised Swing layout manager
  - From: Rashmi H. Ramachandra

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