# ScrolledWindow (Python)

Marta Maria Casetti
mmcasetti@gmail.com 2012
Engade barras de desprazamento no seu widget fillo
Fran Dieguez
frandieguez@gnome.org 2012-2013.

# ScrolledWindow

Unha imaxe dunha xanela con desprazamento.

# Código usado para xerar este exemplo

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)

# Métodos útiles para o widget ScrollWindow

`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.

`add_with_viewport(widget)` is used to add the Gtk.Widget `widget` without native scrolling capabilities inside the window.

`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`.

`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`.)

# API References

Neste exemplo empregaremos o seguinte:

GtkScrolledWindow

Standard Enumerations

GtkImage