Qt5 Matplotlib Designer插件

Question

我正在使用Python 3.6和PyQt-5.9.1與Qt Designer進行UI設計，我需要包含一些matplotlib圖。我發現爲了不修改從ui文件生成的python代碼，每次更新gui部分（這是Qt Designer的預期），我需要一個MatplotlibWidget插件set-在Qt設計器中。

我的問題是，我發現這個插件的引用是來自基於Python 2.7的Python（x，y）包，並且不適用於Python 3.x;或者PyQtdesginerplugins包在Python 3.x/Qt5環境中不起作用（已在此問題How do I add matplotlib plugin to Qt5.4 Designer plugins?中指出）。

有沒有可能在我的Python 3.6和Qt5環境中添加一個MatplotlibWidget到Qt Designer？這將有助於我們充分利用Qt Designer從應用程序邏輯中分離出ui。

Answer 1

下面你會發現一個用於Qt設計器的MatplotlibPlugin的PyQt5版本。

要使用它，請將兩個文件放在PYQTDESIGNERPATH環境變量中包含的目錄中，或放入directories that Qt Designer searches for its own plugins之一的「python」子目錄中。這兩個文件必須完全按照如下所示進行命名。

matplotlibwidget.py：

from PyQt5.QtCore import QSize 
from PyQt5.QtWidgets import QSizePolicy 
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as Canvas 
from matplotlib.figure import Figure 
from matplotlib import rcParams 

rcParams['font.size'] = 9 


class MatplotlibWidget(Canvas): 
    def __init__(self, parent=None, title='', xlabel='', ylabel='', 
       xlim=None, ylim=None, xscale='linear', yscale='linear', 
       width=4, height=3, dpi=100): 
     self.figure = Figure(figsize=(width, height), dpi=dpi) 
     self.axes = self.figure.add_subplot(111) 
     self.axes.set_title(title) 
     self.axes.set_xlabel(xlabel) 
     self.axes.set_ylabel(ylabel) 
     if xscale is not None: 
      self.axes.set_xscale(xscale) 
     if yscale is not None: 
      self.axes.set_yscale(yscale) 
     if xlim is not None: 
      self.axes.set_xlim(*xlim) 
     if ylim is not None: 
      self.axes.set_ylim(*ylim) 

     super(MatplotlibWidget, self).__init__(self.figure) 
     self.setParent(parent) 
     super(MatplotlibWidget, self).setSizePolicy(
      QSizePolicy.Expanding, QSizePolicy.Expanding) 
     super(MatplotlibWidget, self).updateGeometry() 

    def sizeHint(self): 
     return QSize(*self.get_width_height()) 

    def minimumSizeHint(self): 
     return QSize(10, 10) 

matplotlibplugin.py：

import os 
from PyQt5.QtGui import QIcon 
from PyQt5.QtDesigner import QPyDesignerCustomWidgetPlugin 
from matplotlib import rcParams 
from matplotlibwidget import MatplotlibWidget 

rcParams['font.size'] = 9 


class MatplotlibPlugin(QPyDesignerCustomWidgetPlugin): 
    def __init__(self, parent=None): 
     super(MatplotlibPlugin, self).__init__(parent) 
     self._initialized = False 

    def initialize(self, editor): 
     self._initialized = True 

    def isInitialized(self): 
     return self._initialized 

    def createWidget(self, parent): 
     return MatplotlibWidget(parent) 

    def name(self): 
     return 'MatplotlibWidget' 

    def group(self): 
     return 'PyQt' 

    def icon(self): 
     return QIcon(os.path.join(
      rcParams['datapath'], 'images', 'matplotlib.png')) 

    def toolTip(self): 
     return '' 

    def whatsThis(self): 
     return '' 

    def isContainer(self): 
     return False 

    def domXml(self): 
     return '<widget class="MatplotlibWidget" name="mplwidget">\n' \ 
       '</widget>\n' 

    def includeFile(self): 
     return 'matplotlibwidget'