Open
Description
Bug summary
Zoom/Pan not working properly in the following PyQt5 example with new version of Matplotlib. (I checked with 3.4.0 and 3.4.3)
Everything works properly with matplotlib 3.3.4 (Check gifs)
Problem occurs only when multiple plots are embedded.
After sometime of switching between figures and zooming/panning following error is shown.
Traceback (most recent call last):
File "\lib\site-packages\matplotlib\cbook\__init__.py", line 270, in process
func(*args, **kwargs)
File "\lib\site-packages\matplotlib\backend_bases.py", line 3074, in _zoom_pan_handler
self.release_pan(event)
File "\lib\site-packages\matplotlib\backend_bases.py", line 3147, in release_pan
ax.end_pan()
File "\lib\site-packages\matplotlib\axes\_base.py", line 4239, in end_pan
del self._pan_start
AttributeError: _pan_start
Thanks
Code for reproduction
import sys
import os
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QAbstractItemView, QAction, QApplication, QFileDialog, QInputDialog
from PyQt5.uic import loadUiType
from matplotlib.figure import Figure
from matplotlib.backends.backend_qt5agg import (
FigureCanvasQTAgg as FigureCanvas,
NavigationToolbar2QT as NavigationToolbar)
Ui_MainWindow, QMainWindow = loadUiType('window.ui')
class Main(QMainWindow, Ui_MainWindow):
def __init__(self, ):
super(Main, self).__init__()
self.setupUi(self)
self.fig_dict = {}
self.figdata_dict = {}
self.mplfigs.itemClicked.connect(self.changefig)
fig = Figure()
self.addmpl(fig)
def changefig(self, item):
text = item.text()
text = str(text)
self.rmmpl()
self.addmpl(self.fig_dict[text])
def addfig(self, name, fig):
self.fig_dict[name] = fig
self.mplfigs.addItem(name)
def addmpl(self,fig):
self.canvas = FigureCanvas(fig)
self.mplvl.addWidget(self.canvas)
self.canvas.draw()
self.toolbar = NavigationToolbar(self.canvas,self.mplwindow, coordinates=2)
self.toolbar.zoom()
self.mplvl.addWidget(self.toolbar)
def rmmpl(self,):
self.mplvl.removeWidget(self.canvas)
self.canvas.close()
self.mplvl.removeWidget(self.toolbar)
self.toolbar.close()
if __name__ == '__main__':
fig1 = Figure()
ax1f1 = fig1.add_subplot(111)
ax1f1.plot([1,2,3,1,2,3])
fig2 = Figure()
ax1f2 = fig2.add_subplot(111)
ax1f2.plot([100,200,300,400,100,200,300])
ax1f2.plot([200,300,400,200,300,400])
app = QApplication(sys.argv)
main = Main()
main.addfig('Oneplot', fig1)
main.addfig('Twoplots', fig2)
main.show()
sys.exit(app.exec_())Actual outcome
Expected outcome
Operating system
Windows 10 64-bit
Matplotlib Version
3.4.3
Matplotlib Backend
pyqt5
Python version
3.9.7
Jupyter version
No response
Other libraries - window.ui
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>1280</width>
<height>768</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralwidget">
<layout class="QHBoxLayout" name="horizontalLayout">
<item>
<widget class="QWidget" name="mplwindow" native="true">
<property name="sizePolicy">
<sizepolicy hsizetype="Expanding" vsizetype="Preferred">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="mouseTracking">
<bool>false</bool>
</property>
<property name="focusPolicy">
<enum>Qt::ClickFocus</enum>
</property>
<layout class="QVBoxLayout" name="mplvl"/>
</widget>
</item>
<item>
<widget class="QListWidget" name="mplfigs">
<property name="sizePolicy">
<sizepolicy hsizetype="Fixed" vsizetype="Expanding">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>200</width>
<height>0</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>200</width>
<height>16777215</height>
</size>
</property>
<property name="focusPolicy">
<enum>Qt::NoFocus</enum>
</property>
</widget>
</item>
</layout>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>1280</width>
<height>21</height>
</rect>
</property>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>
Installation
pip
Conda channel
No response