Hi Rob,

I have been working trying to use the Register method but i believe is not working. First I have a doubt about what is the Groouping parameter. I don't know what I am supposed to put there.

I have a bunch of xamls files, I add them all at run time to a ResourceDictionary and register it with the ThemeManager, but it doesnt work. I have buttons to switch between styles whenever I select one of the built in Themes works fine, but I select one of mine and it just goes back to the default (which I believe is the IGTheme).

Any help you can give me would be greatly appreciated!

Thanks Rob,

We use the Theme="[current]" in the code, and it is not working still.

How can I know the available groups? And what if i want something to be aplied to everything and not just one control? Is this literal for those cases: ThemeManager.AllGroupingsLiteral? Because using this literal causes an exception.

Thanks in advance!

Hi Rob,

So i kept working and trying different things, debugging I could find a collection that shows groups. I don't understand how the whole grouping concept works.

I set "Ribbon" as the group, and my sample worked. It applies the changes to just about everything, even the DockManager and other controls. Why is that? Why the Ribbon group seems to apply changes to so many different controls? What controls do not change when the Ribbon is the group?

What is the group that covers everything? I am setting a theme so all my controls change with the theme, I wouldnt like to have some controls not changing because they don't belong to a group.

What would be the most generic group? "Primitives"?

Thanks!

Hi Dzyann,

Groupings are used to determine which controls actually use the registered theme.  If, for example, you have a XamRibbon, XamDataGrid and XamDockManager on the screen and you registered a theme for the "DockManager" group, when you set the current theme it's only going to apply the theme to the dock manager.  Even if your resource dictionary has styles for the ribbon and XamDataGrid, only the XamDockManager is actually going to accept the theme.

So let's say that you want to create a theme that targets multiple controls.  To do this you need to register the theme multiple times for each grouping that you want included. 

ThemeManager.Register("MyTheme", "Ribbon", dictionary);
ThemeManager.Register("MyTheme", "DockManager", dictionary);
ThemeManager.Register("MyTheme", "DataPresenter", dictionary);

I've attached a sample that demonstrates this.  The samples shows how the themes can be targeted at specific controls and how they can be applied to all controls.

Thanks Rob, your sample works like a charm. However when i do the same in the solution I am working on, when I add a theme for say the "Ribbon" grouping it actually applies changes to everything, not only the ribbon. Which is rather confusing, because i have tried reproducing the same in your example and I couldnt make it.

I will consider that my solution has something wrong, or there is maybe a weird bug that we are bumping into. But assuming we had the correct behavior and we wanted to apply styles to just about everything, how woudl you do it? I haven't seen any way to get all the groupings that are registered.

We have tried using the "Primitives" grouping and it seems that it applies changes to all the objects, is this correct? It would be great if that is the case. 

Thanks a lot for your assistance!

Hi Dzyann,

You can get the groupings registered for a particular theme by using ThemeManager.GetGroupingsForTheme().  Again, this will only show you the groupings that pertain to the actual controls that you have loaded into your application.

Actually, this should meet your requirement as long as you already have the controls you are planning to use in your application.  You can call the method passing in "IGTheme" and it will return a string array full of groupings.  You can then iterate over the array and Register your custom theme for each of the groupings. 

string[] groupings = ThemeManager.GetGroupingsForTheme("IGTheme");
foreach (string group in groupings)
    ThemeManager.Register("MyTheme", group, resourceDictionary);

I don't know if the Primitives group covers everything.  From my tests it seems like it does but it's probably safer to use the above code.

Hi Rob,

I know it has been a while since I asked this, but since we upgraded to Infragistics 2015.1 setting the Theme through the ThemeManager is not longer working.

For example, if at runtime we set:

ThemeManager.CurrentTheme = "Onyx";

Nothing happens. It seems like some major change on the ThemeManager has been introduced on infragistics 2015.1.

How can you change the Theme at runtime now? Also, is doing Theme="[current]" still a valid technique for setting the theme on the controls so it changes according to what the ThemeManager is using?

Thank you!

Hi Dzyann,

You're very welcome.  Let me know if you have any further questions on this matter.

Thanks a lot for your help!