PyGobject（七十五）Gtk.Widget之Gtk.Scrollbar

最新推荐文章于 2024-05-30 21:14:51 发布

原创最新推荐文章于 2024-05-30 21:14:51 发布 · 1.5k 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#Python #PyGobject #gtk+ #Scrollbar #Widget

PyGObject 同时被 2 个专栏收录

111 篇文章

订阅专栏

PyGobject详解

111 篇文章

订阅专栏

本文介绍了一个使用Python和Gtk库创建水平滚动条的示例。通过调整Gtk Scrollbar的属性，可以实现在文本中光标位置的变化。该示例展示了如何创建一个简单的窗口，并在其中添加一个文本视图和一个水平滚动条。

部署运行你感兴趣的模型镜像

GtkScrollbar

Gtk.Scrollbar

Gtk.Scrollbar滚动条，是同Gtk.Scale一样，是Gtk.Range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 (orientation, adjustment)

Virtual Methods

Properties

Name	Type	Flags	Short Description

Signals

Name	Short Description

例子

这里写图片描述
代码：

#!/usr/bin/env python3
# Created by xiaosanyu at 16/7/11
# section 119
# 
# author: xiaosanyu
# website: yuxiaosan.tk \
#          http://blog.youkuaiyun.com/a87b01c14
# created: 16/7/11

TITLE = "Scrollbar"
DESCRIPTION = """
The Gtk.Scrollbar widget is a horizontal or vertical scrollbar,
depending on the value of the Gtk.Orientable :orientation property.
"""

import gi

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

string = "Try to move the Scrollbar,watch carefully the text cursor changes!!"


class ScrollbarWindow(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self, title="Scrollbar Demo")
        gird = Gtk.Grid()
        textview = self.create_textview()
        self.buffer = textview.get_buffer()
        gird.attach(textview, 0, 0, 1, 1)
        sb = self.create_scrollbar()
        gird.attach(sb, 0, 1, 1, 1)
        self.add(gird)

    @staticmethod
    def create_textview():
        textview = Gtk.TextView()
        buffer = textview.get_buffer()
        buffer.set_text(string)
        buffer.place_cursor(buffer.get_start_iter())
        return textview

    def create_scrollbar(self):
        ad = Gtk.Adjustment(value=0, lower=0, upper=len(string), step_increment=1, page_increment=1,
                            page_size=0)
        sb = Gtk.Scrollbar(orientation=Gtk.Orientation.HORIZONTAL, adjustment=ad)
        sb.connect("value-changed", self.move)
        return sb

    def move(self, range):
        self.buffer.place_cursor(self.buffer.get_iter_at_offset(int(range.get_value())))
        # print("Move", range.get_value())


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


if __name__ == "__main__":
    main()