从pyside开始chaco-traits弹出窗口的新事件循环？

Question

我想使用从PySide启动的chaco制作一张numpy图像滑块。我曾尝试使用matplotlib，但它缺乏更新的速度，所以我一直在尝试chaco。下面的脚本从初始化Pyside对话框开始，从这里我试图打开一个chaco/traits窗口，它用于显示numpy数组的不同视图，使用滑块滚动数组，像电影一样。该脚本，但我得到一个警告消息：

QCoreApplication::exec: The event loop is already running 

我想我可能需要使用其自己的线程或东西，开始查科窗口，但我不知道如何去做。任何帮助将不胜感激，脚本如下：

import numpy as np 
import sys 
from PySide.QtCore import * 
from PySide.QtGui import * 

app = QApplication(sys.argv) 

from traits.api import * 
from traitsui.api import * 
from enable.api import * 
from enable.component_editor import * 
from chaco.api import * 
from chaco.tools.api import * 
from chaco import * 


class chacoWindow(HasTraits): 
    #Chaco popup window with slider 
    plot = Instance(HPlotContainer) 
    #Slider max value is set using Frame 
    Frame = Int 
    high = 100 

    traits_view = View(Group(
        Item('plot', 
          editor=ComponentEditor(), 
          show_label=False), 
        Item('Frame', 
          editor = RangeEditor( 
          high_name = 'high', 
          format  = '%d', 
          is_float = False))), 
        width=1000, height=600, resizable=True, title="Track viewer") 

    def __init__(self, dataDict, arg1): 

     self.high = arg1 - 1 
     self.dataDict = dataDict 

     self.data1 = self.dataDict['Movie1'] 
     self.data2 = self.dataDict['Movie2'] 

     #Left plot 
     self.plotdata1 = ArrayPlotData(image1 = self.data1['0']) 
     plotLeft = Plot(self.plotdata1) 
     plotLeft.img_plot("image1")    
     #Right plot 
     self.plotdata2 = ArrayPlotData(image2 = self.data2['0']) 
     plotRight = Plot(self.plotdata2) 
     plotRight.img_plot("image2") 

     #Add some zoom/pan tools 
     plotLeft.tools.append(PanTool(plotLeft)) 
     plotLeft.tools.append(BetterZoom(plotLeft, zoom_factor=0.8, zoom_to_mouse = True)) 
     plotLeft.tools.append(DragZoom(plotLeft, drag_button="right")) 
     plotRight.tools.append(PanTool(plotRight)) 
     plotRight.tools.append(BetterZoom(plotRight)) 
     plotRight.tools.append(DragZoom(plotRight, drag_button="right")) 
     #Axes shared   
     plotLeft.range2d = plotRight.range2d 
     container = HPlotContainer(plotLeft, plotRight) 
     self.plot = container 

    def _Frame_changed(self): 
     #Change frame when slider changes 
     self.plotdata1.set_data("image1", self.data1[str(self.Frame)]) 
     self.plotdata2.set_data("image2", self.data2[str(self.Frame)]) 


class Form(QDialog): 
    #Basic form dialog using Pyside 
    def __init__(self, dataDict, parent=None): 
     super(Form, self).__init__(parent) 
     self.dataDict = dataDict 
     self.totalFrames = len(dataDict['Movie1']) 
     formatButton1 = QPushButton("Format 1")   
     buttonLayout = QHBoxLayout() 
     buttonLayout.addStretch() 
     buttonLayout.addWidget(formatButton1) 
     #Add VBox space for extra widgets 
     layout = QVBoxLayout()   
     layout.addLayout(buttonLayout) 
     self.setLayout(layout) 
     self.connect(formatButton1, SIGNAL("clicked()"), self.setChaco)      
     self.setWindowTitle('Master form') 

    def setChaco(self): 
     #Create chaco window instance 
     scatter = chacoWindow(dataDict, self.totalFrames) 
     scatter.configure_traits(self) 


if __name__ == "__main__":  
    #make some demo data 
    ar0 = np.zeros((25,25)) 
    ar0[10][10] = 1 
    ar1 = np.zeros((25,25)) 
    ar1[12][12] = 1  
    #Dictionary of images 
    dataDict = {'Movie1': {'0': ar0, '1':ar1, '2':ar0}, 
       'Movie2': {'0': ar1, '1':ar0, '2':ar1}} 
    form = Form(dataDict) 
    form.show() 
    app.exec_() 

Answer 1

我设法找到解决方案。更改此功能可解决此问题：

def setChaco(self): 
    #Create chaco window instance 
    scatter = chacoWindow(dataDict, self.totalFrames) 
    #Change this line: scatter.configure_traits(self) 
    scatter.edit_traits() 

这似乎是让PySide事件循环处理所有事情。