I tried to get the following but did not find the right set of properties to modify.
I have a Windows forms application with an UltraToolbarsManager which displays a Ribbon with all its RibbonTabs collapsed. When the user clicks on a tab caption and that tab is displayed, I would like to display that tab in a semi-transparent way letting the form show through the tab transparency.
First, is it possible to do that?Second, how can I do that?
Thanks
If you want the Form to have different levels of transparency, you will have to use unmanaged code (if you are not familiar with using unmanaged code, I would not recommend trying to accomplish this). You will first have to make the drop down form a layered window. You can do this with the SetWindowLong api, passing in GWL_EXSTYLE for the nIndex and or-ing in WS_EX_LAYERED to the window's existing ex-style for the new dwNewLong. Then you will have to create a bitmap with various transparencies on it and use that in the UpdateLayeredWindow api to make the form have different transparencies on it.
I answered too fast. This is not exactly what I need. Now everything is transparent, including the Tools and their caption within RibbonGroups because we change the opacity of the parent form. I tried setting BackColorAlpha and ForegroundAlpha of almost everything trying to change the display but couldn't.
Do you have any other tricks up your sleeve?
Marcel Gosselin
Thanks, that worked perfectly
There is currently no property to do this. However, you could use a creation filter to accomplish this. Add the following class to your project and in the constructor of your Form, create a new instance of it and assign it to the CreationFilter property of your UltraToolbarsManager:
public class OpacityCreationFilter : IUIElementCreationFilter{ private UltraToolbarsManager manager;
public OpacityCreationFilter( UltraToolbarsManager manager ) { this.manager = manager; }
void IUIElementCreationFilter.AfterCreateChildElements( UIElement parent ) { }
bool IUIElementCreationFilter.BeforeCreateChildElements( UIElement parent ) { if ( parent is RibbonTabPageUIElement && this.manager.Ribbon.IsMinimized ) { Form form = parent.Control.FindForm();
const float opacity = 0.6f;
if ( form != null && form.Opacity != opacity ) form.Opacity = opacity; }
return false; }}