PyGobject（四十九）布局容器之Layout

Gtk.Layout

Gtk.Layout支持滚动

继承关系

Gtk.Layout是Gtk.Container和Gtk.Scrollable的直接子类

Methods

方法修饰词	方法名及参数
static	new (hadjustment, vadjustment)
	get_bin_window ()
	get_hadjustment ()
	get_size ()
	get_vadjustment ()
	move (child_widget, x, y)
	put (child_widget, x, y)
	set_hadjustment (adjustment)
	set_size (width, height)
	set_vadjustment (adjustment)

Virtual Methods

Properties

Name	Type	Flags	Short Description
height	int	r/w/en	The height of the layout
width	int	r/w/en	The width of the layout

Signals

Name	Short Description

例子

代码：

#!/usr/bin/env python3
# Created by xiaosanyu at 16/7/11
# section 066
# 
# author: xiaosanyu
# website: yuxiaosan.tk \
#          http://blog.youkuaiyun.com/a87b01c14
# created: 16/7/11

TITLE = "Layout"
DESCRIPTION = """
Gtk.Layout is similar to Gtk.DrawingArea in that it’s a “blank slate” and
doesn’t do anything but paint a blank background by default.
"""

import gi

gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

HEIGHT = 20
NUM = 100


class LayoutWindow(Gtk.Window):
    def __init__(self):
        super(LayoutWindow, self).__init__(title="Layout Demo")
        self.set_size_request(200, 200)
        # va = Gtk.Adjustment(value=0, lower=0, upper=1000, step_increment=1, page_increment=1, page_size=0)
        # ha = Gtk.Adjustment(value=0, lower=0, upper=50, step_increment=1, page_increment=2, page_size=1)
        # self.layout = Gtk.Layout.new(hadjustment=ha, vadjustment=va)
        self.layout = Gtk.Layout.new(None, None)
        # important Sets the size of the scrollable area of the layout.
        self.layout.set_size(200, NUM * HEIGHT)
        # layout.set_size(100, 100)
        self.sw = Gtk.ScrolledWindow()
        self.sw.set_shadow_type(Gtk.ShadowType.ETCHED_IN)
        self.sw.set_policy(Gtk.PolicyType.ALWAYS, Gtk.PolicyType.ALWAYS)
        self.sw.add(self.layout)
        for i in range(NUM):
            self.layout.put(Gtk.Label("label" + str(i)), 20, HEIGHT * i)

        self.add(self.sw)


def main():
    win = LayoutWindow()
    win.connect("delete-event", Gtk.main_quit)
    win.show_all()
    Gtk.main()


if __name__ == "__main__":
    main()

代码解析：
最主要的就是这一句

self.layout.set_size(200, NUM * HEIGHT)

要不然不能滚动

代码下载地址：http://download.youkuaiyun.com/detail/a87b01c14/9594728