matplotlib PyQT 위젯에서 Funcitoning하지 않는 이벤트 리스너

Question

나는 PyQt5 GUI에서 활용하려고하는 draggable matplotlib 객체 라이브러리를 가지고 있습니다. 객체 'event listeners은 독립형 matplotlib Figure 창에서 올바르게 작동하지만 그림이 QT 위젯에 포함되어있을 때는 작동하지 않습니다. QT 위젯에서 패치를 드래그하려고하면 두 플롯이 올바르게 렌더링되고 오류 메시지가 표시되지 않습니다.

객체 MCVE :

import matplotlib.patches as patches 

class _DragObj: 
    def __init__(self, ax): 
     self.parentcanvas = ax.figure.canvas 
     self.parentax = ax 

     self.clickpress = self.parentcanvas.mpl_connect('button_press_event', self.on_click) 
     self.clicked = False 

    def on_click(self, event): 
     if event.inaxes != self.parentax: return 

     self.mousemotion = self.parentcanvas.mpl_connect('motion_notify_event', self.on_motion) 
     self.clickrelease = self.parentcanvas.mpl_connect('button_release_event', self.on_release) 

     self.clickx = event.xdata 
     self.clicky = event.ydata 

     self.clicked = True 

    def on_release(self, event): 
     self.clicked = False 
     self.disconnect() 

    def disconnect(self): 
     self.parentcanvas.mpl_disconnect(self.mousemotion) 
     self.parentcanvas.mpl_disconnect(self.clickrelease) 
     self.parentcanvas.draw() 

    def stopdrag(self): 
     self.myobj.set_url('') 
     self.parentcanvas.mpl_disconnect(self.clickpress) 

class _DragPatch(_DragObj): 
    def __init__(self, ax, xy): 
     super().__init__(ax) 

     self.oldxy = xy 

    def on_motion(self, event): 
     if not self.clicked: return 
     if event.inaxes != self.parentax: return 

     oldx, oldy = self.oldxy 
     dx = event.xdata - self.clickx 
     dy = event.ydata - self.clicky 
     newxy = [oldx + dx, oldy + dy] 
     self.myobj.xy = newxy 

     self.parentcanvas.draw() 

    def on_release(self, event): 
     self.clicked = False 
     self.oldxy = self.myobj.xy 

     self.disconnect() 

class DragRectangle(_DragPatch): 
    def __init__(self, ax, xy, width, height, angle=0.0, **kwargs): 
     self.myobj = patches.Rectangle(xy, width, height, angle, **kwargs) 
     ax.add_artist(self.myobj) 

     super().__init__(ax, xy) 

작용하기 matplotlib 예 :

import minidrag 
import matplotlib.pyplot as plt 

fig = plt.figure() 
ax = fig.add_subplot(111) 
rect = minidrag.DragRectangle(ax, (0, 0), 2, 1) 

ax.set_xlim(-5, 5) 
ax.set_ylim(-5, 5) 

plt.show() 

비 기능적 PyQt는 예 :

import sys 
from PyQt5 import QtWidgets as QtW 
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas 
from matplotlib.backends.backend_qt5agg import NavigationToolbar2QT as NavigationToolbar 
from matplotlib.figure import Figure 
import minidrag 

class windowGUI(QtW.QDialog): 
    def __init__(self): 
     super().__init__() 

     # Set up figure 
     width_px = 800 
     height_px = 600 

     rect = QtW.QDesktopWidget().availableGeometry() 
     screenrez = (rect.width(), rect.height()) 
     left_px = (screenrez[0] - width_px)/2 
     top_px = (screenrez[1] - height_px)/2 
     self.setGeometry(left_px, top_px, width_px, height_px) 
     self.canvas = PlotCanvas() 

     layout = QtW.QVBoxLayout() 
     layout.addWidget(NavigationToolbar(self.canvas, self)) 
     layout.addWidget(self.canvas) 
     self.setLayout(layout) 

class PlotCanvas(FigureCanvas): 
    def __init__(self): 
     fig = Figure(frameon=False) 
     super().__init__(fig) 
     super().setSizePolicy(QtW.QSizePolicy.Expanding, QtW.QSizePolicy.Expanding) 
     super().updateGeometry() 

     ax = fig.add_subplot(111) 
     rect = minidrag.DragRectangle(ax, (0, 0), 2, 1) 

     ax.set_xlim(-5, 5) 
     ax.set_ylim(-5, 5) 

app = QtW.QApplication(sys.argv) 
window = windowGUI() 
window.show() 
sys.exit(app.exec_()) 

내가 파이썬 3.6.0를 사용하고,하기 matplotlib (2.0 .0), PyQt5 (5.8)

무엇이 누락 되었습니까?

Answer 1

끌기 이벤트가 아니라 캔버스가 직사각형을 원래 위치에 유지하면서 가비지 수집중인 minidrag.DragRectangle 인스턴스 만 문제가된다는 것을 알 수 있습니다. 당신이 인스턴스 변수로 사각형 설정할 수 있습니다 수정으로

:

self.rect = minidrag.DragRectangle(ax, (0, 0), 2, 1) 

(. Python2.7 및 PyQt4와 테스트가)