PyGobject（六十四）Gtk.Widget之Gtk.Arrow

本文介绍如何使用 Gtk.Arrow 组件绘制指向四个基本方向（上、下、左、右）的简单箭头，并提供了一个 Python 示例代码，演示如何创建并显示带有不同阴影效果的箭头。

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GtkArrow

Gtk.Arrow

继承关系

Gtk.Arrow上下左右四个箭头

这里写图片描述

Methods

方法修饰词	方法名及参数
static	new (arrow_type, shadow_type)
	set (arrow_type, shadow_type)

Virtual Methods

Properties

Name	Type	Flags	Short Description
arrow-type	Gtk.ArrowType	r/w	The direction the arrow should point
shadow-type	Gtk.ShadowType	r/w	Appearance of the shadow surrounding the arrow

Signals

Name	Short Description

例子

这里写图片描述
代码：

#!/usr/bin/env python3
# Created by xiaosanyu at 16/7/14
# section 103
# 
# author: xiaosanyu
# website: yuxiaosan.tk \
#          http://blog.youkuaiyun.com/a87b01c14
# created: 16/7/14

TITLE = "Arrow"
DESCRIPTION = """
Gtk.Arrow should be used to draw simple arrows that
need to point in one of the four cardinal directions (up, down, left, or right).
"""
import gi

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


class ArrowWindow(Gtk.Window):
    def __init__(self, *args, **kwargs):
        Gtk.Window.__init__(self, title="Arrow Example")
        self.set_size_request(200, 200)
        grid = Gtk.Grid()
        grid.set_column_homogeneous(True)
        grid.set_row_homogeneous(True)
        arrow_left = Gtk.Arrow(arrow_type=Gtk.ArrowType.LEFT, shadow_type=Gtk.ShadowType.IN)
        arrow_right = Gtk.Arrow(Gtk.ArrowType.RIGHT)
        arrow_up = Gtk.Arrow(Gtk.ArrowType.UP)
        arrow_down = Gtk.Arrow(Gtk.ArrowType.DOWN)
        grid.attach(arrow_left, 0, 1, 1, 1)
        grid.attach(arrow_right, 2, 1, 1, 1)
        grid.attach(arrow_up, 1, 0, 1, 1)
        grid.attach(arrow_down, 1, 2, 1, 1)
        self.add(grid)


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


if __name__ == "__main__":
    main()