/b-gtk/fix-viz

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Add options to viz treeview to not show the line graph, and to only show the main line.
Set the revision browser to use these options.

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Lines of Context:
ui.py
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        super(GtkProgressBar, self).__init__()
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        self.set_fraction(0.0)
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        self._stack = stack
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        self.current = None
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        self.total = None
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    def finished(self):
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        self._stack.remove(self)
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        self.pulse()
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    def update(self, msg=None, current=None, total=None):
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        if current:
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            self.current = current
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        if total:
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            self.total = total
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        if msg is not None:
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            self.set_text(msg)
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        if None not in (self.current, self.total):
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            self.set_fraction(1.0 * self.current / self.total)
 
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        self.set_fraction(1.0 * current / total)
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        while gtk.events_pending():
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            gtk.main_iteration()
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class GtkWindowProgressBarStack(gtk.Window):
 
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class GtkProgressBarStack(gtk.Window):
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    def __init__(self):
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        super(GtkWindowProgressBarStack, self).__init__(type=gtk.WINDOW_TOPLEVEL)
 
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        super(GtkProgressBarStack, self).__init__(type=gtk.WINDOW_TOPLEVEL)
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        self.set_border_width(0)
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        self.set_title("Progress")
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        self.set_position(gtk.WIN_POS_CENTER_ALWAYS)
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    def remove(self, pb):
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        self.vbox.remove(pb)
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        if len(self.vbox.get_children()) == 0: # If there is nothing to show, don't leave a ghost window here
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             self.destroy()
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class PasswordDialog(gtk.Dialog):
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        """Return a nested progress bar.
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        """
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        if self._progress_bar_stack is None:
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            self._progress_bar_stack = GtkWindowProgressBarStack()
 
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            self._progress_bar_stack = GtkProgressBarStack()
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        return self._progress_bar_stack.get_nested()
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    def set_progress_bar_vbox(self, vbox):