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Toolbar Change Image Command When Pressed [message #663539]

Tue, 05 April 2011 14:41

Ricky de Klerck

Messages: 295
Registered: January 2011

Senior Member

Hi,

We're trying to achieve the following:

We have custom commands to change data in a view. These commands appear in the toolbar with an image. This works fine but when an image is clicked, a new image should appear (so the user knows which 'filter' is used). Allso just one image can appear 'pressed', because only one filter can be applied.

I hope it's clear, thanks in advance.

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Re: Toolbar Change Image Command When Pressed [message #663547 is a reply to message #663539]

Tue, 05 April 2011 14:55

Paul Webster

Messages: 6859
Registered: July 2009
Location: Ottawa

Senior Member

On 04/05/2011 10:41 AM, Ricky de Klerck wrote:
> Hi,
>
> We're trying to achieve the following:
> We have custom commands to change data in a view. These commands appear
> in the toolbar with an image. This works fine but when an image is
> clicked, a new image should appear (so the user knows which 'filter' is
> used). Allso just one image can appear 'pressed', because only one
> filter can be applied.

You want to add org.eclipse.ui.commands.IElementUpdater to your handler.
When it's time to update the icon for your commands, you would call
org.eclipse.ui.commands.ICommandService.refreshElements(Stri ng, Map) to
notify the framework it's time to request a UI refresh.

PW

--
Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Platform_Expression_Framework
http://wiki.eclipse.org/Menu_Contributions
http://wiki.eclipse.org/Menus_Extension_Mapping
http://help.eclipse.org/helios/index.jsp?topic=/org.eclipse. platform.doc.isv/guide/workbench.htm

Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions

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Re: Toolbar Change Image Command When Pressed [message #663605 is a reply to message #663547]

Tue, 05 April 2011 19:49

Ricky de Klerck

Messages: 295
Registered: January 2011

Senior Member

Thank you for the reply, I haven't tried it yet but it sounds like this is what I need.

So I should implement the interface for every handler and call this method? Before I call this method, I should change the images for every command?

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Re: Toolbar Change Image Command When Pressed [message #665483 is a reply to message #663539]

Thu, 14 April 2011 18:41

Johan Schulz

Messages: 20
Registered: November 2010

Junior Member

Quote:

So I should implement the interface for every handler and call this method? Before I call this method, I should change the images for every command?

You have to implement IElementUpdater for every handler. You can change the image, text, tooltip and dropMenuDownID (if its and toolbar button) in the implemented method from IElementUpdater.

afaik it is called automatically if the handler gets executed but you have to call refreshElements if you would like to change the appearance after some underlying condition has changed.

Johan

[Updated on: Thu, 14 April 2011 18:47]

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Re: Toolbar Change Image Command When Pressed [message #666734 is a reply to message #663539]

Fri, 22 April 2011 02:19

jim liu

Messages: 37
Registered: February 2011
Location: shanghai

Member

as javadoc said IElementUpdater
Everybody should go through the
ICommandService refreshElements(*) method.
but how can i get ICommandService,and then invoke IElementUpdater

java eclipse Search
http://javafind.appspot.com/

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Re: Toolbar Change Image Command When Pressed [message #666807 is a reply to message #666734]

Fri, 22 April 2011 17:21

Johan Schulz

Messages: 20
Registered: November 2010

Junior Member

You can get the service from the service registry. IServiceLocator

from ViewPart

getSite().getService( ICommandService.class )

from Handler impl.

PlatformUI.getWorkbench().getService( ICommandService.class )

Johan

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