view_id = view.id()
window = sublime.active_window()
window.attach_view( view_id )

    """
        Moves a view from its current window to this window object. It does nothing if the view 
        is already on the current window.

        @return bool True when the view is moved, otherwise False.
    """

import sublime
import sublime_plugin


class GatherAllWindowsHereCommand( sublime_plugin.TextCommand ):

    def run( self, edit ):
        windows        = sublime.windows()
        current_window = sublime.active_window()
        windows.remove( current_window )

        for window in windows:

                for view in window.views()
                    current_window.attach_view( view.id() )