[Matplotlib-users] Widget event issue #5812

[Enkhbayar Erdenee]

Hello

I have an issue on widget events. I have created a figure which contains
several subplots. When click on one of the subplots, it shows another
figure. This new figure contains button and rectangle selector widgets.
Until this it works fine. Problem is nothing happens if I click on the
buttons or draw rectangle on this new figure. It works well (i mean button
onclick, line_select_callback events raise ), if I just create figure not
after click the subplots. I do not know what I am doing wrong. Please help
me.

By the way, I am using:
matplotlib.*version* : '1.4.3'
matplotlib.get_backend() : Qt4Agg
python: 2.7.10 | Anaconda 2.3.0 (64-bit)


Here is the some part of code that I having problem:


import sys

import cv2

from matplotlib.widgets import RectangleSelector

import matplotlib.pyplot as plt

from matplotlib.widgets import Button


def main_window():


    def open_figure(event):

        ax = event.inaxes

        if ax is None:

            # Occurs when a region not in an axis is clicked...

            return

        for i in xrange(len(event.canvas.figure.axes)):

            if event.canvas.figure.axes[i] is ax:

                plt.ion()

                # Show clicked image on new figure

                show_new_figure(im)


        fig = plt.figure(1)



        # some code which locates subplots

        # show images on subplots

        show_image(im)



        fig.canvas.mpl_connect('button_press_event', open_figure)

        plt.show()


def show_image(im):

    im = im[:, :, (2, 1, 0)]

    plt.cla()

    plt.imshow(im)

    plt.axis('off')

    plt.draw()

    # plt.show()


def show_new_figure(im):


    class Btn:

        def save(self, event):

            plt.close()

        def close(self, event):

            plt.close()

        def exit(self, event):

            sys.exit()


    callback = Btn()


    im = im[:, :, (2, 1, 0)]

    fig2, ax = plt.subplots(figsize=(10, 10))

    plt.cla()

    plt.imshow(im)


    axSave = plt.axes([0.5, 0.01, 0.1, 0.075])

    axClose = plt.axes([0.39, 0.01, 0.1, 0.075])

    axExit = plt.axes([0.6, 0.01, 0.1, 0.075])


    btnSave = Button(axSave, 'Save')

    btnSave.on_clicked(callback.save)

    btnClose = Button(axClose, 'Close')

    btnClose.on_clicked(callback.close)

    btnExit = Button(axExit, 'Exit')

    btnExit.on_clicked(callback.exit)


    # draw rectangle

    def line_select_callback(eclick, erelease):

        'eclick and erelease are the press and release events'

        x1, y1 = eclick.xdata, eclick.ydata

        x2, y2 = erelease.xdata, erelease.ydata

        print ("X, Y points: (%3.2f, %3.2f) --> (%3.2f, %3.2f)" % (x1, y1,
x2, y2))


    rs = RectangleSelector(ax, line_select_callback,

                           drawtype='box', useblit=True,

                           button=[1, 3],

                           minspanx=5, minspany=5,

                           rectprops=dict(facecolor='blue',
edgecolor='blue',

                                            alpha=1, fill=False),

                           spancoords='pixels')

    rs.set_active(True)


    plt.axis('off')

    plt.show()


Thank you for consideration.
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