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HowTo reference images/icons in e4 [message #647142]

Tue, 04 January 2011 18:11

St Clair Clarke

Messages: 118
Registered: March 2010

Senior Member

Hello,

I am seeking help as to reference icons/images in my e4 project.

Here are my scenarios:
1. The image is in the same package as the xwt file
In this case my xwt code would be:

<Button text="Icon in the same package as xwt file" image="demo.gif"/>

2. Image is in a different package from the xwt file:
In this case I have attempted to use the URI:

 image="platform:/plugin/plugin-name/package-containing-icon/iconname.gif"

This does not work

I am just thinking that using this would means the plugin would have to be executed. B
ut suppose I am creating a small stand-alone XWT application - no plugin would be involved here and this URI does not work

3. Image is in icons directory on the root of the plugin
This is where I would like to keep my images/icons, but I do not know how to reference this folder.

I would appreciate any pointers I can get.

Thanks

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Re: HowTo reference images/icons in e4 [message #647780 is a reply to message #647142]

Sat, 08 January 2011 22:04

Yves YANG

Messages: 688
Registered: July 2009

Senior Member

"St Clair Clarke" <st_clair@flowja.com> wrote in message
news:ifvnid$5dp$1@news.eclipse.org...
> Hello,
> I am seeking help as to reference icons/images in my e4 project.
>
> Here are my scenarios:
> 1. The image is in the same package as the xwt file
> In this case my xwt code would be:
> <Button text="Icon in the same package as xwt file" image="demo.gif"/>
>
> 2. Image is in a different package from the xwt file:
> In this case I have attempted to use the URI:
>
> image=" platform:/plugin/plugin-name/package-containing-icon/iconnam e.gif "
> This does not work
>
> I am just thinking that using this would means the plugin would have to
> be executed. B
> ut suppose I am creating a small stand-alone XWT application - no plugin
> would be involved here and this URI does not work
>
> 3. Image is in icons directory on the root of the plugin
> This is where I would like to keep my images/icons, but I do not know
> how to reference this folder.
>
> I would appreciate any pointers I can get.

It is good point. By now, XWT is independ of the Eclipse Platform. So the
URI is not supported. You can use only Java resources.

As for the Eclipse platform or OSGi bundle support, please fill a bug.

Best regards
Yves YANG
>
> Thanks
>

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Re: HowTo reference images/icons in e4 [message #647782 is a reply to message #647780]

Sat, 08 January 2011 23:01

Erdal Karaca

Messages: 854
Registered: July 2009

Senior Member

I was able to achieve a "flexible solution" by implementing a String to Image converter, see:

org.eclipse.e4.xwt.XWT.registerConvertor(IConverter)

Example:

XWT.registerConvertor(new IConverter() {
public Object getFromType() {
return String.class;
}

public Object getToType() {
return Image.class;
}

public Object convert(Object fromObject) {
String path = (String) fromObject;
return ImageDescriptor.createFromURL(new URL(path)).createImage();
}
});

Of course, you must not forget to dispose the created image...

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Re: HowTo reference images/icons in e4 [message #647783 is a reply to message #647782]

Sat, 08 January 2011 23:03

Erdal Karaca

Messages: 854
Registered: July 2009

Senior Member

Note: that solution works because the default cconverters fail to create an image...

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Re: HowTo reference images/icons in e4 [message #647797 is a reply to message #647782]

Sun, 09 January 2011 11:22

Erdal Karaca

Messages: 854
Registered: July 2009

Senior Member

If you want the converter to be only available when osgi is running, you could use a declarative services component (component.xml, see PDE's "new component" wizard)...

Note: in e4 the declarative services plugin has to be running anyways.

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Re: HowTo reference images/icons in e4 [message #648041 is a reply to message #647782]

Mon, 10 January 2011 22:37

Yves YANG

Messages: 688
Registered: July 2009

Senior Member

Splendid! I forget this one.

yves
"Erdal Karaca" <erdal.karaca.de@googlemail.com> wrote in message
news:igaq2k$qmh$1@news.eclipse.org...
> I was able to achieve a "flexible solution" by implementing a String to
> Image converter, see:
>
> org.eclipse.e4.xwt.XWT.registerConvertor(IConverter)
>
> Example:
>
> XWT.registerConvertor(new IConverter() {
> public Object getFromType() {
> return String.class;
> }
>
> public Object getToType() {
> return Image.class;
> }
>
> public Object convert(Object fromObject) {
> String path = (String) fromObject;
> return ImageDescriptor.createFromURL(new URL(path)).createImage();
> }
> });
>
> Of course, you must not forget to dispose the created image...
>

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Re: HowTo reference images/icons in e4 [message #648189 is a reply to message #648041]

Tue, 11 January 2011 17:04

St Clair Clarke

Messages: 118
Registered: March 2010

Senior Member

Hello Yves,

It would be intersting to know how topics are chosen for answering.

Could you/someone review these two topics for me:
1.http:// www.eclipse.org/forums/index.php?t=msg&th=202351&sta rt=0&S=be0aec32fefccce6118e0cb39f9f806c

2. http:// www.eclipse.org/forums/index.php?t=msg&th=202409&sta rt=0&S=be0aec32fefccce6118e0cb39f9f806c

Thank you very much. The Trigger seems to have a problem cycling.

Thaks

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Re: HowTo reference images/icons in e4 [message #648226 is a reply to message #648189]

Tue, 11 January 2011 21:32

Erdal Karaca

Messages: 854
Registered: July 2009

Senior Member

I am sure that if someone knows the answer to your other questions, they will be answered. Though, I am not sure whether insisting on this is the right way...

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