光标位置在TextView中已更改 [英] Cursor position changed in textview

问题描述

在PyGTK中，无论何时将光标移到我的应用程序的textview中，我都希望获得光标的当前位置.因此，我需要创建一个回调函数并连接到信号.但是我不确定从哪里得到该信号.

In PyGTK, I want to get the current position of the cursor whenever the cursor is moved inside a textview in my app. So I need to create a callback function and connect to a signal. But I'm not sure from where to get that signal.

推荐答案

您要监视缓冲区的cursor-position属性，请查看下面的示例以监视光标位置.

You want to monitor the cursor-position property of the buffer, look at the example here below for monitoring the cursor position.

from gi.repository import Gtk

class CursorSample(Gtk.Application):
    def __init__(self):
        Gtk.Application.__init__(self, application_id="org.app.CursorSample")

        self.buffer = Gtk.TextBuffer()
        self.buffer.connect("notify::cursor-position",
                            self.on_cursor_position_changed)

        self.tw = Gtk.TextView()
        self.tw.set_buffer(self.buffer)
        self.tw.props.wrap_mode = Gtk.WrapMode.CHAR

    def do_activate(self):
        main_window = Gtk.Window(Gtk.WindowType.TOPLEVEL)
        main_window.add(self.tw)
        self.add_window(main_window)
        main_window.set_position(Gtk.WindowPosition.CENTER)
        main_window.show_all()

    def on_cursor_position_changed(self, buffer, data=None):
        print buffer.props.cursor_position

if __name__ == "__main__":
    cursorsample = CursorSample()
    cursorsample.run(None)

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