Matplotlib"pick_event"无法与FigureCanvasTkAgg在嵌入式图形中工作 [英] Matplotlib "pick_event" not working in embedded graph with FigureCanvasTkAgg

问题描述

我正在尝试处理一些事件，以与Tkinter框架中的嵌入式子图进行用户交互.像这样的示例

I'm trying to handle some events to perform user interactions with embedded subplots into a Tkinter frame. Like in this example

与"key_press_event"和"button_press_event"一起正常工作，但不适用于"pick_event".

Works fine with "key_press_event" and "button_press_event", but does not work with "pick_event".

我从链接中修改了该示例，只是在mpl_connect调用之后添加了以下代码:

I modified that example from the link, just adding the following piece of code after the mpl_connect calling:

def on_button_press(event):
    print('you pressed mouse button')

canvas.mpl_connect('button_press_event', on_button_press)

def on_pick(event):
    print('you picked:',event.artist)

canvas.mpl_connect('pick_event', on_pick)

为什么"pick_event"在嵌入的图形中不起作用?以及如何使其工作?

Why "pick_event" doesn't work into embedded graphs? And how do get it to work?

我的配置详细:

• Windows 10
• Python 3.5(conda版本)
• 通过pip安装的Matplotlib 1.5.3

提前谢谢！

推荐答案

好，我解决了...

大多数事件我们只需要使用mpl_connect方法即可发生.我的错误是，我没有注意到我们需要明确地说我们的情节是可拾取的"，将参数picker=True仅在完全单击艺术家的情况下才会触发事件，而picker=x其中x是整数，它是触发器的像素容限.因此，除了我在问题中插入的更改之外，我们还应该替换

Most events we just need to use mpl_connect method to the magic happen. My mistake is that I didn't notice that we need to say explictly that our plot is "pickable" putting a argument picker=True to only triggers the event if clicked exacly into the artist, and picker=x where x is an integer that is the pixel tolerance for the trigger. So beyond the changes I inserted for pick in the question, we should replace

a.plot(t, s)用于a.plot(t, s,picker=True)或a.plot(t, s,picker=10)，例如

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