我有一个令人讨厌的问题,过去几个月我一直无法解决。基本上,我使用jupyter / ipython笔记本来调用pyqt并显示3d几何数据。这是我将应用程序初始化为对象的方式,在添加一些多边形和点之后,我调用show():
class Figure(object):
'''
Main API functions
'''
def __init__(self):
print "... initializing canvas ..."
self.app = QApplication(sys.argv)
self.app.processEvents()
...
def show(self): #Show
self.GUI = GLWindow(data)
self.app.exec_()
我想通过笔记本电脑小组不断地互动/更新小部件。但是一旦我在jupyter笔记本中调用show()命令,我就无法运行任何更多单元格或更新小部件,因为笔记本输出排队(?)并被锁定:
#Initialize figure object inside the notebook
fig = plb.figure()
...
fig.show() #Locks out any further jupyter commands while widget on screen
fig.update() #Does not get executed until widget is closed
似乎通过笔记本调用的.show()函数放弃了对python内核(?)的控制,但它不清楚如何将其恢复,以及如何将其连接到正在显示的小部件。
鼠标和键盘事件确实与小部件交互,但它们使用小部件代码中的内部函数,如mouseMoveEvent():
class GLWindow(QtGui.QWidget):
def __init__(self, fig, parent=None):
QtGui.QWidget.__init__(self, parent)
self.glWidget = GLWidget(fig, parent=self)
...
class GLWidget(QtOpenGL.QGLWidget):
def __init__(self, fig, parent=None):
QtOpenGL.QGLWidget.__init__(self, parent)
...
def mouseMoveEvent(self, event):
buttons = event.buttons()
modifiers = event.modifiers()
dx = event.x() - self.lastPos.x()
dy = event.y() - self.lastPos.y()
...
我已尝试遵循相关建议,但我不了解如何使用小部件之外的连接或事件。
任何帮助都表示赞赏,我花了这么多时间试图解决这个令人尴尬的问题。猫
答案 0 :(得分:4)
我在jupyter论坛的帮助下找到了解决方案。显然,笔记本中有一个运行时技巧,可以让你动态地与glwindow交互。很高兴终于解决这个问题......
https://github.com/ipython/ipython/blob/master/examples/IPython%20Kernel/gui/gui-qt.py
以下是整个功能,以防将来删除该示例:
#!/usr/bin/env python
"""Simple Qt4 example to manually test event loop integration.
This is meant to run tests manually in ipython as:
In [5]: %gui qt
In [6]: %run gui-qt.py
Ref: Modified from http://zetcode.com/tutorials/pyqt4/firstprograms/
"""
from PyQt4 import QtGui, QtCore
class SimpleWindow(QtGui.QWidget):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.setGeometry(300, 300, 200, 80)
self.setWindowTitle('Hello World')
quit = QtGui.QPushButton('Close', self)
quit.setGeometry(10, 10, 60, 35)
self.connect(quit, QtCore.SIGNAL('clicked()'),
self, QtCore.SLOT('close()'))
if __name__ == '__main__':
app = QtCore.QCoreApplication.instance()
if app is None:
app = QtGui.QApplication([])
sw = SimpleWindow()
sw.show()
try:
from IPython.lib.guisupport import start_event_loop_qt4
start_event_loop_qt4(app)
except ImportError:
app.exec_()