diff options
| -rw-r--r-- | gr-wxgui/src/python/common.py | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/gr-wxgui/src/python/common.py b/gr-wxgui/src/python/common.py index 9c97ce1ec..f355fd3ce 100644 --- a/gr-wxgui/src/python/common.py +++ b/gr-wxgui/src/python/common.py @@ -19,6 +19,41 @@ # Boston, MA 02110-1301, USA. # +import wx + +def bind_to_visible_event(win, callback): + """ + Bind a callback to a window when its visibility changes. + Specifically, callback when the window changes visibility + when a notebook tab event in one of the parents occurs. + @param win the wx window + @param callback a 1 param function + """ + #is the window visible in the hierarchy + def is_wx_window_visible(my_win): + while True: + parent = my_win.GetParent() + if not parent: return True #reached the top of the hierarchy + #if we are hidden, then finish, otherwise keep traversing up + if isinstance(parent, wx.Notebook) and parent.GetCurrentPage() != my_win: return False + my_win = parent + #call the callback, the arg is shown or not + def callback_factory(my_win, my_callback): + cache = [None] + def the_callback(*args): + visible = is_wx_window_visible(my_win) + if cache[0] != visible: my_callback(visible) + cache[0] = visible + return the_callback + handler = callback_factory(win, callback) + #bind the handler to all the parent notebooks + while win: + if isinstance(win, wx.Notebook): + win.Bind(wx.EVT_NOTEBOOK_PAGE_CHANGED, handler) + if not win.GetParent(): + win.Bind(wx.EVT_ACTIVATE, handler) + win = win.GetParent() + #A macro to apply an index to a key index_key = lambda key, i: "%s_%d"%(key, i+1) |