How to customize statusbar in eclipse? - eclipse

The plugin I made provides a tree viewer, and I want to display the number of items selected in the tree viewer in the status bar like eclipse's progressView.
How should I configure it?

Related

How to hide trim status bar controls programatically in RCP.

I have a combo control created in the trim status bar using eclipse RCP. I have multiple perspectives in the application. Please suggest a way to hide the combo control in the status bar for a particular perspective programatically (not via plugin.xml).
P.S: I am using NEON eclipse.

Customize Eclipse process console tool bar

I want to rearrange the tool bar buttons for Eclipse console and remove some items. Is this possible? Customizing the main menu bar and tool bar for the entire application can be done easily.
I'd like access to both the View action and Context menu options.
The Console View does not permit this.

changing UI and text of Updates available popup

I working on eclipse rcp project where I need to add updates available popup
to my eclipse rcp application. I could show the popup, but now my question is
can I change UI and text of that popup. I want the look of UI in my own desired.
Is it possible to customize the UI and text?
Please find the attached image.

Why some widgets do not get included in WindowBuilder?

Im using WindowBuilder tool to build a GUI for my application and I see that some widgets or tools don't get included in the Design view. In my case, I have created a new SWT Application window and I try to add DropDown Menu in the Application window and I always get a red icon when I take the DropDown menu from the palette to the design area. Can anyone tell me what is the problem in this case?
I found the mistake I was doing...It is not possible to directly add a DropDown Menu in the design editor. You first have to add a Menu and then add a DropDown Menu. And the widgets do work in all forms of applications you want to develop.

How to access to menu items?

I created a menu of RCP application only in plugin.xml. How to access to items of this menu programicaly to change their texts and images at runtime?
If you are using command framework to contribute those menu items, you can use org.eclipse.ui.commands.IElementUpdater to change the text and image.