<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="scrolledwindow.py" xml:lang="gl">

  <info>

    <title type="text">ScrolledWindow (Python)</title>

    <link type="guide" xref="beginner.py#scrolling"/>

    <link type="next" xref="paned.py"/>

    <revision version="0.1" date="2012-05-26" status="draft"/>

    <credit type="author copyright">

      <name>Marta Maria Casetti</name>

      <email its:translate="no">mmcasetti@gmail.com</email>

      <years>2012</years>

    </credit>

    <desc>Engade barras de desprazamento no seu widget fillo</desc>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>Fran Dieguez</mal:name>

      <mal:email>frandieguez@gnome.org</mal:email>

      <mal:years>2012-2013.</mal:years>

    </mal:credit>

  </info>

  <title>ScrolledWindow</title>

  <media type="image" mime="image/png" src="media/scrolledwindow.png"/>

  
Unha imaxe dunha xanela con desprazamento.

  <links type="section"/>

  <section id="code">

    <title>Código usado para xerar este exemplo</title>

    from gi.repository import Gtk

import sys

class MyWindow(Gtk.ApplicationWindow):

    def __init__(self, app):

        Gtk.Window.__init__(

            self, title="ScrolledWindow Example", application=app)

        self.set_default_size(200, 200)

        # the scrolledwindow

        scrolled_window = Gtk.ScrolledWindow()

        scrolled_window.set_border_width(10)

        # there is always the scrollbar (otherwise: AUTOMATIC - only if needed

        # - or NEVER)

        scrolled_window.set_policy(

            Gtk.PolicyType.ALWAYS, Gtk.PolicyType.ALWAYS)

        # an image - slightly larger than the window...

        image = Gtk.Image()

        image.set_from_file("gnome-image.png")

        # add the image to the scrolledwindow

        scrolled_window.add_with_viewport(image)

        # add the scrolledwindow to the window

        self.add(scrolled_window)

class MyApplication(Gtk.Application):

    def __init__(self):

        Gtk.Application.__init__(self)

    def do_activate(self):

        win = MyWindow(self)

        win.show_all()

    def do_startup(self):

        Gtk.Application.do_startup(self)

app = MyApplication()

exit_status = app.run(sys.argv)

sys.exit(exit_status)

  </section>

  <section id="methods">

    <title>Métodos útiles para o widget ScrollWindow</title>

    <list>

      <item>
set_policy(hscrollbar_policy, vscrollbar_policy) where each of the arguments is one of Gtk.Policy.AUTOMATIC, Gtk.Policy.ALWAYS, Gtk.Policy.NEVER regulates whether the horizontal and vertical scrollbars should appear: with AUTOMATIC they appear only if needed, ALWAYS and NEVER are self-explanatory.
</item>

      <item>
add_with_viewport(widget) is used to add the Gtk.Widget widget without native scrolling capabilities inside the window.
</item>

      <item>
set_placement(window_placement) sets the placement of the contents with respect to the scrollbars for the scrolled window. The options for the argument are Gtk.CornerType.TOP_LEFT (default: the scrollbars are on the bottom and on the right of the window), Gtk.CornerType.TOP_RIGHT, Gtk.CornerType.BOTTOM_LEFT, Gtk.CornerType.BOTTOM_RIGHT.
</item>

      <item>
set_hadjustment(adjustment) and set_vadjustment(adjustment) set the Gtk.Adjustment adjustment. This is the representation of a value with a lower and upper bound, together with step and page increments, and a page size, and it is constructed as Gtk.Adjustment(value, lower, upper, step_increment, page_increment, page_size) where the fields are of type float. (Note that step_increment is not used in this case, it can be set to 0.)
</item>

    </list>

  </section>

  <section id="references">

    <title>API References</title>

    
Neste exemplo empregaremos o seguinte:

    <list>

      <item>
<link href="http://developer.gnome.org/gtk3/unstable/GtkScrolledWindow.html">GtkScrolledWindow</link>
</item>

      <item>
<link href="http://developer.gnome.org/gtk3/unstable/gtk3-Standard-Enumerations.html">Standard Enumerations</link>
</item>

      <item>
<link href="http://developer.gnome.org/gtk3/unstable/GtkImage.html">GtkImage</link>
</item>

    </list>

  </section>

</page>