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POGtkSourceView Scroll to Line with Gobject Introspection [python]
 

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    <p>I have successfully created a python GTK application using Gobject Introspection, and opened a source file in a GTKSourceView Widget. </p> <p>I am attempting to scroll to place a specific line (line 150) into the center of the screen when the user clicks a button.</p> <p>I have read <a href="https://stackoverflow.com/questions/10625099/how-to-programmatically-scroll-to-a-specific-line-in-gtktextview-gtksourceview">how to (programmatically) scroll to a specific line in gtktextview/gtksourceview</a></p> <p>and also the documentation surrounding GtkSourceViews, GTKTextView, and the buffer objects for both of these (it is my understanding that the sourceview inherits from the textview)</p> <p>I have attempted to use the following methods:</p> <p>-getting an iterator at line 150, and then using the scroll_to_iter() method - getting an iterator at line 150, making a mark at the iterator, and then using the scroll_to_mark() method</p> <p>I know the iterators and marks are correct, because i can successfully use the place_cursor(iter) method and it successfully places the marker at the end of line 150, however either scrolling to the mark or the iterator using the given methods does nothing. </p> <p>The scroll to mark method does not return a value, but the iterator method is returning false.</p> <p>Can anyone please suggest a way to achieve this?</p> <p>My testing code is as follows:</p> <pre><code>from gi.repository import Gtk from gi.repository import GObject from gi.repository import GtkSource class MyApplication (Gtk.Window): def __init__(self, *args, **kwargs): Gtk.Window.__init__(self, *args, **kwargs) self.set_title("SourceView Test") self.set_size_request(400, 400) self.connect("destroy", Gtk.main_quit) self.create_widgets() self.show_all() def create_widgets(self): self.sourceview=GtkSource.View.new() self.lm = GtkSource.LanguageManager.new() self.scrolledwindow = Gtk.ScrolledWindow() vbox = Gtk.VBox() self.add(vbox) vbox.pack_start(self.scrolledwindow,True,True,0) self.scrolledwindow.add_with_viewport(self.sourceview) self.scrolledwindow.show_all() button = Gtk.Button("Jump To Line") button.connect("clicked", self.scroll_to_line_and_mark) self.open_file_in_srcview("/home/tel0s/source_android/system/core/adb/adb.c") vbox.pack_start(button, False, False, 5) def open_file_in_srcview(self,filename,*args,**kwargs): self.buffer = self.sourceview.get_buffer() self.filename = filename self.language = self.lm.guess_language(self.filename,None) self.sourceview.set_show_line_numbers(True) if self.language: self.buffer.set_highlight_syntax(True) self.buffer.set_language(self.language) else: print 'No language found for file "%s"' % self.filename self.buffer.set_highlight_syntax(False) txt = open(self.filename).read() self.buffer.set_text(txt) self.buffer.place_cursor(self.buffer.get_start_iter()) def scroll_to_line_and_mark(self,*args,**kwargs): print "setting iterator" iterator = self.sourceview.get_buffer().get_iter_at_line(150) print iterator print "scrolling to iter" if self.sourceview.scroll_to_iter(iterator,0, False, 0.5, 0.5): print "done!" else: print "scrolling failed!!" if __name__ == "__main__": MyApplication() Gtk.main() </code></pre>
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