How to set the Content to show Green Circle in Tool Window Follow

Please show the code calling setIcon(). What IDE version are you using?

These are the methods I would like to implement. I am making sure that every content has a unique name. Please let me know if there is a better way.

public static void setContentActive(Project project, String contentName) {
    getCpWindow(project).getContentManager().findContent(contentName).setIcon(PluginIcons.TOOL_WINDOW);
}

public static void setContentInactive(Project project, String contentName) {
    getCpWindow(project).getContentManager().findContent(contentName).setIcon(null);
}

getCpWindow:

public static ToolWindow getCpWindow(Project project) {
    return ToolWindowManager.getInstance(project).getToolWindow("CPWindow");
}

And here is the line from PluginIcons:

public interface PluginIcons {
    Icon TOOL_WINDOW = IconLoader.getIcon("/icons/tool-window.png");
}

The TOOL_WINDOW (13 x 13) is just used as an example. I would like any way to indicate that a process is runnning in the content, either with an Icon or with the green circle under the name. Thanks

First of all, "green indicator" is additional layer for some base icon, so it cannot be added to the text directly. We still don't have API for showing icon for a certain content (tab of tool window), instead of it there is a piece of magic:

content.putUserData(ToolWindow.SHOW_CONTENT_ICON, Boolean.TRUE);
content.setIcon({baseIcon});

After that, you can manage icons like this:

content.setIcon(myLiveState ? ExecutionUtil.getLiveIndicator({baseIcon}) : {baseIcon});

Thank you so much Vassiliy, works like a charm!