[Bugs] #3859 sugar URGE: Sugar scroll bar clicks should invoke page up/page down and not relocate the scroll cursor

[Sugar Labs Bugs]

#3859: Sugar scroll bar clicks should invoke page up/page down and not relocate
the scroll cursor
--------------------------+-------------------------------------------------
    Reporter:  greenfeld  |          Owner:  erikos  
        Type:  defect     |         Status:  new     
    Priority:  Urgent     |      Milestone:  0.98    
   Component:  sugar      |        Version:  0.97.x  
    Severity:  Major      |       Keywords:          
Distribution:  OLPC       |   Status_field:  Assigned
--------------------------+-------------------------------------------------

Comment(by humitos):

 This property ({{{gtk-primary-button-warps-slider}}}) has changed between
 gtk2 and Gtk3:

  * Gtk3 -> default TRUE
    * http://developer.gnome.org/gtk3/stable/GtkSettings.html#GtkSettings
 --gtk-primary-button-warps-slider

  * gtk2 -> default FALSE
    * http://developer.gnome.org/gtk/2.24/GtkSettings.html#GtkSettings
 --gtk-primary-button-warps-slider

 I tried to set it up when the Activity starts but it says that property
 does not exist.

 {{{
 >>> from gi.repository import Gtk
 >>> settings = Gtk.Settings.get_default()
 >>> settings.get_property('gtk-primary-button-warps-slider')
 Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
 TypeError: object of type `GtkSettings' does not have property `gtk-
 primary-button-warps-slider'
 >>>
 }}}

-- 
Ticket URL: <http://bugs.sugarlabs.org/ticket/3859#comment:8>
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