I am having some problems with reparenting
I have a program which allows you to tab several sourceview widgets
(glorified textview widget), and there are 5 options for each
sourceview. So if you edit 10 text files, you would get 50 sourceview
widgets, and that is very expensive. Instead, I want to reuse the 10
sourceviews. An easy way to do this is via reparenting.
However, some wierd things happen when you go back to a tab you
previously visited. The sourceview becomes detached and more or less
floats over the window it is meant to be a child of. The problem goes
away if you resize the window. As a temporary fix I increase and
decrease the window size by one, sort of like jiggling it. Uncomment
lines 124-131 to activate it.
I have attached a minimal example which indicates what the problem is.
Anyone have any idea what may be causing this?
Thanks in advanced
Peyman Askari
#!/usr/bin/env python
import sys
try:
import pygtk
pygtk.require("2.0")
except:
pass
try:
import gtk
import gtk.glade
except:
sys.exit(1)
import gtksourceview
topology_blocked=[True]
window=gtk.Window()
debug=[False]
def create_text_view(editable=True):
"""Create the text entry widget
"""
#create source view widget
textView=gtksourceview.SourceView()
#make sure it is editable
textView.set_editable(editable)
#update its properties
textView.set_show_line_numbers(True)
textView.set_show_line_markers(False)
#create source buffer to replace text buffer
sourceBuffer=gtksourceview.SourceBuffer()
textView.set_buffer(sourceBuffer)
#update source buffer properties
sourceBuffer.set_highlight(True)
sourceBuffer.set_check_brackets(True)
sourceBuffer.set_max_undo_levels(100)
#need a languages manager to find Python language
languagesManager=gtksourceview.SourceLanguagesManager()
L=languagesManager.get_available_languages()
#cycle over all languages and look for 'Python'
for i in L:
if i.get_name()=='Python':
sourceLanguage=i
break
#assign the appropriate language to the source buffer
sourceBuffer.set_language(sourceLanguage)
#save a reference to the text box
#widgets['user_defined_connection_function_text_view']=textView
#create the scrolled window
scrolledWindow=gtk.ScrolledWindow()
#set the scrolled window policies
scrolledWindow.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
#first add the vBox to the scrolled windows
scrolledWindow.add(textView)
#call show on the widgets
textView.show()
scrolledWindow.show()
#set a minimum size
scrolledWindow.set_size_request(100,100)
return scrolledWindow
def create_development_notebook(editable=True):
"""Create topology with one tab, filled with a text view widget
"""
#the notebook as well as the labels for each tab
notebook=gtk.Notebook()
#set tabs to the left hand side
notebook.set_tab_pos(gtk.POS_TOP)
for i in range(3):
label=gtk.Label("Unsaved Document %d*"%i)
#append labels, and pass the page entries
notebook.append_page(create_text_view(editable=editable),label)
#call show on the notebook
notebook.show()
#put it in a vbox as it gets returned to a notebook append page method
vBox=gtk.VBox()
vBox.pack_start(notebook,expand=True,fill=True,padding=0)
vBox.show()
return (vBox,notebook)
def development_notebook_switch_page(notebook,data=None,current_page=-1):
"""Each time the page is changed, must ensure the v_paned window is attached to current page
"""
global topology_blocked
global window
global debug
if not topology_blocked[0]:
old_v_box=notebook.get_nth_page(notebook.get_current_page())
print old_v_box
label=old_v_box.get_children()[0]
print 'child->',old_v_box.get_children()[0]
#label.unparent()
#old_v_box.remove(label)
#print 'child->',old_v_box.get_children()[0]
new_v_box=notebook.get_nth_page(current_page)
#new_v_box.pack_start(label,expand=False,fill=False,padding=0)
label.reparent(new_v_box)
print new_v_box
#UNCOMMENT THE BELOW TO TEMPORARILY FIX PROBLEM
#if debug[0]:
# window.resize(window.get_size()[0]+1,window.get_size()[1]+1)
# debug[0]=not debug[0]
#else:
# window.resize(window.get_size()[0]-1,window.get_size()[1]-1)
# debug[0]=not debug[0]
#UNCOMMENT THE ABOVE TO TEMPORARILY FIX PROBLEM
def make_notebook():
global topology_blocked
global window
window.connect('destroy',on_main_window_destroy)
window.connect('delete_event',on_main_window_delete_event)
notebook=gtk.Notebook()
notebook.set_tab_pos(gtk.POS_BOTTOM)
L1=gtk.Label('Causes Problems')
L2=gtk.Label('Causes Problems')
L3=gtk.Label('Causes Problems')
notebook.append_page(create_development_notebook()[0],L1)
notebook.append_page(gtk.VBox(),L2)
notebook.append_page(gtk.VBox(),L3)
notebook.set_current_page(0)
#notebook.get_nth_page(0).pack_start(gtk.Label('one'),expand=False,fill=False,padding=0)
#connect the signals
notebook.connect('switch-page',development_notebook_switch_page)
window.add(notebook)
window.show_all()
topology_blocked[0]=False
def on_main_window_delete_event(widget,data=None):
"""Return false so the window gets destroyed
"""
return False
def on_main_window_destroy(widget,data=None):
"""Return false so the window gets destroyed
"""
gtk.main_quit()
if __name__ == '__main__':
try:
make_notebook()
gtk.main()
except KeyboardInterrupt:
sys.exit(1)
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