Re: [e4-dev] Problem with css theme switching

[Bogdan Gheorghe <gheorghe@xxxxxxxxxx>]

Hi Christian -

Take a look at ThemeEngine.setTheme
and put a breakpoint at the part where it tries to resolve the stylesheet
URL. Is the resolved URL valid for your stylesheets?

- Bogdan

From:	Christian Strotz <Christian.Strotz@xxxxxxxxxxxxx>
To:	"'e4-dev@xxxxxxxxxxx'" <e4-dev@xxxxxxxxxxx>
Date:	07/04/2012 10:26 AM
Subject:	[e4-dev] Problem with css theme switching
Sent by:	e4-dev-bounces@xxxxxxxxxxx

---

Hello together
 
In my e4 rcp app I use three different
css styles. With the org.eclipse.e4.ui.css.swt.theme bundle it’s
possible to switch between the themes.
 
What I have:
 
1.       In plugin.xml I
use the extension point of org.eclipse.e4.ui.css.swt.theme to register
my themes
 
<extension point="org.eclipse.e4.ui.css.swt.theme">
           
 <theme
           
        basestylesheeturi="css/default.css"
           
        id="themes.default"
           
        label="Default
Theme">
           
 </theme>
           
 <theme
           
        basestylesheeturi="css/bright.css"
           
        id="themes.bright"
           
        label="Bright
Theme">
           
 </theme>
           
 <theme
           
       basestylesheeturi="css/blue.css"
           
        id="themes.blue"
           
        label="Blue
Theme">
           
 </theme>
</extension>
 
2.  In build.properties I set that
all css files will be exported and the org.eclipse.e4.ui.css.swt.theme
is in the product configuration as dependency
3.  I defined some menus in Application.e4xmi
to switch between the themes
4.  The handler to switch between
the themes:
 
public
final
class
SwitchThemeHandler {
           
 @Execute
           
 public
void
execute(IThemeEngine engine, @Named(XmiIDs.COMMANDPARAMETERS_THEME_ID)
String themeId) {
           
        engine.setTheme(themeId, true);
           
 }
 
           
 @CanExecute
           
 public
boolean
canExecute(IThemeEngine engine, @Named(XmiIDs.COMMANDPARAMETERS_THEME_ID)
String themeId) {
           
        String activeThemeId = engine.getActiveTheme().getId();
           
        return
!activeThemeId.equals(themeId);
           
 }
}
 
It works great if I start the product
in eclipse. When I export the product I can properly run it without errors
but there is no style active and I can’t switch between it. When I go
into the exported plugin jar I can see my css files.
 
What is going wrong and how can I fix
it? 
 
greetings
Christian Strotz

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