PyGobject（十九）布局容器之Alignment

本文链接：https://blog.youkuaiyun.com/a87b01c14/article/details/52037203

GtkAlignment

Gtk.Alignment

继承关系

Gtk.Alignment控制子部件的对齐方式和大小。

Gtk.Alignment是Gtk.Bin的直接子类
这里写图片描述

Methods

方法修饰词	方法名及参数
static	new (xalign, yalign, xscale, yscale)
	get_padding ()
	set (xalign, yalign, xscale, yscale)
	set_padding (padding_top, padding_bottom, padding_left, padding_right)

Virtual Methods

Properties

Name	Type	Flags	Short Description
bottom-padding	int	d/r/w	The padding to insert at the bottom of the widget. deprecated
left-padding	int	d/r/w	The padding to insert at the left of the widget. deprecated
right-padding	int	d/r/w	The padding to insert at the right of the widget. deprecated
top-padding	int	d/r/w	The padding to insert at the top of the widget. deprecated
xalign	float	d/r/w	水平对齐方式，0.0左对齐，1.0右对齐 deprecated
xscale	float	d/r/w	水平剩余空间分配给子部件，0.0不分配，1.0分配全部剩余空间 deprecated
yalign	float	d/r/w	垂直对齐方式，0.0上对齐，1.0下对齐 deprecated
yscale	float	d/r/w	垂直剩余空间分配给子部件，0.0不分配，1.0分配全部剩余空间 deprecated

Signals

Name	Short Description

例子

这里写图片描述
代码：

#!/usr/bin/env python3
# Created by xiaosanyu at 16/7/7
# section 020
TITLE = "Alignment"
DESCRIPTION = """
The Gtk.Alignment widget controls the alignment and size of its child widget.
It has four settings: xscale, yscale, xalign, and yalign.
"""
import gi

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

anchor = {"Left": (0, 0, 0, 0), "Right": (1, 0, 0, 0), "Top": (0.5, 0, 0, 0), "Buttom": (0.5, 1, 0, 0),
          "Center": (0.5, 0.5, 0, 0), "XFull": (0.5, 0.5, 1, 0), "YFull": (0.5, 0.5, 0, 1)}


class AlignmentWindow(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self, title="Alignment Example")
        self.set_size_request(500, 200)
        grid = Gtk.Grid()
        grid.set_border_width(20)
        grid.set_column_spacing(20)
        grid.set_row_spacing(20)

        for i, (key, value) in enumerate(anchor.items()):
            frame = Gtk.Frame.new()
            frame.set_shadow_type(Gtk.ShadowType.ETCHED_OUT)
            frame.set_size_request(150, 100)
            align = Gtk.Alignment.new(value[0], value[1], value[2], value[3])
            button = Gtk.Button(key)
            align.add(button)
            frame.add(align)
            grid.attach(frame, i % 3, i / 3, 1, 1)
        self.add(grid)


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


if __name__ == "__main__":
    main()

分析主要代码
定义七个Alignment参数

anchor = {"Left": (0, 0, 0, 0), "Right": (1, 0, 0, 0), "Top": (0.5, 0, 0, 0), "Buttom": (0.5, 1, 0, 0),
"Center": (0.5, 0.5, 0, 0), "XFull": (0.5, 0.5, 1, 0), "YFull": (0.5, 0.5, 0, 1)}

根据上述7组信息创建7个Alignment，每个Alignment中添加一个button，将这7个Alignment添加到7个frame中

for i, (key, value) in enumerate(anchor.items()):
    frame = Gtk.Frame.new()         
    frame.set_shadow_type(Gtk.ShadowType.ETCHED_OUT)
    frame.set_size_request(150, 100)
    align = Gtk.Alignment.new(value[0], value[1], value[2], value[3])
    button = Gtk.Button(key)
    align.add(button)
    frame.add(align)
    grid.attach(frame, i % 3, i / 3, 1, 1)