PyQt4 滚动条与嵌入场景的交互不正确

Question

我有一个问题，结合PyQt4滚动条（主窗口上）与嵌入式场景-一切工作正常，直到我调整我的窗口，然后我的场景开始旅行与滚动条离开页面。你知道吗

下面是演示此行为的简化的完整代码（后面附有两个屏幕截图以明确显示此交互）：

import sys, os
from pyface.qt import QtGui, QtCore
os.environ['ETS_TOOLKIT'] = 'qt4'

from traits.api import HasTraits,Instance,on_trait_change
from traitsui.api import View,Item
from mayavi import mlab
from mayavi.core.ui.api import MayaviScene, MlabSceneModel, SceneEditor

class Mayavi_Scene(HasTraits):
    scene = Instance(MlabSceneModel, ())

    @on_trait_change('scene.activated')
    def update_scene(self):
        Mayavi_Scene.fig1 = mlab.figure(1, bgcolor=(.5,.5,.5))
        self.scene.mlab.clf(figure=Mayavi_Scene.fig1)
        testPlot = mlab.test_contour3d()

    view = View(Item('scene', editor = SceneEditor(scene_class=MayaviScene),
                    height=300, width=300, show_label=False),
                resizable=True,
                )

class P1(QtGui.QWidget):
    def __init__(self, parent=None):
        super(P1, self).__init__(parent)
        layout = QtGui.QGridLayout(self)
        layout.setContentsMargins(20,20,20,20)
        layout.setSpacing(10)

        self.label_edge1 = QtGui.QLabel('')
        self.label_edge1.setMargin(5)
        self.label_edge1.setFrameStyle(QtGui.QFrame.Panel | QtGui.QFrame.Sunken)
        layout.addWidget(self.label_edge1, 0, 0, 10, 10)
        self.label_edge1.show()

        self.label_avgVol = QtGui.QLabel('Test')
        self.label_avgVol.setMargin(5)
        self.label_avgVol.setFrameStyle(QtGui.QFrame.Box | QtGui.QFrame.Sunken)
        self.label_avgVol.setAlignment(QtCore.Qt.AlignCenter | QtCore.Qt.AlignVCenter)
        layout.addWidget(self.label_avgVol, 0, 0, 1, 10)
        self.label_avgVol.show()

        self.viz1 = Mayavi_Scene()
        self.ui1 = self.viz1.edit_traits(parent=self, kind='subpanel').control
        layout.addWidget(self.ui1, 1, 1, 1, 9)

class P2(QtGui.QWidget):    
    def __init__(self, parent=None):
        super(P2, self).__init__(parent)
        layout = QtGui.QGridLayout(self)
        layout.setContentsMargins(20,20,20,20)
        layout.setSpacing(10)

class MainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setGeometry(50, 50, 500, 500)   

        tab1 = P1(self)
        tab2 = P2(self)

        self.tabs = QtGui.QTabWidget(self)
        self.tabs.resize(250,150)

        self.tabs.addTab(tab1, 'Page 1')
        self.tabs.addTab(tab2, 'Page 2')

        self.setWindowTitle('SCROLLBAR ERROR EXAMPLE')

        self.groupscroll = QtGui.QHBoxLayout()
        self.groupscrollbox = QtGui.QGroupBox()

        self.MVB = QtGui.QVBoxLayout()
        self.MVB.addWidget(self.tabs)

        scroll = QtGui.QScrollArea()
        widget = QtGui.QWidget(self)
        widget.setLayout(QtGui.QHBoxLayout())
        widget.layout().addWidget(self.groupscrollbox)
        scroll.setWidget(widget)
        scroll.setWidgetResizable(True)
        self.groupscrollbox.setLayout(self.MVB)
        self.groupscroll.addWidget(scroll)
        self.setCentralWidget(scroll)
        self.show()

if __name__ == '__main__':
    app = QtGui.QApplication.instance()
    w = MainWindow()
    sys.exit(app.exec_())

重构前

重构后

编辑：.gif以显示效果（注意对象是如何被其自身的帧覆盖的，该帧在结尾处包含对象，而不是与其一起移动；这就像3d场景对象没有被通知其周围的所有其他对象都在更改一样）：

Answer 1

我修改了添加滚动条的地方。你知道吗

import sys, os
from pyface.qt import QtGui, QtCore
os.environ['ETS_TOOLKIT'] = 'qt4'

from traits.api import HasTraits,Instance,on_trait_change
from traitsui.api import View,Item
from mayavi import mlab
from mayavi.core.ui.api import MayaviScene, MlabSceneModel, SceneEditor

class Mayavi_Scene(HasTraits):
    scene = Instance(MlabSceneModel, ())

    @on_trait_change('scene.activated')
    def update_scene(self):
        Mayavi_Scene.fig1 = mlab.figure(1, bgcolor=(.5,.5,.5))
        self.scene.mlab.clf(figure=Mayavi_Scene.fig1)
        testPlot = mlab.test_contour3d()

    view = View(Item('scene', editor = SceneEditor(scene_class=MayaviScene),
                    height=300, width=300, show_label=False),
                resizable=True,
                )

class P1(QtGui.QWidget):
    def __init__(self, parent=None):
        super(P1, self).__init__(parent)
        layout = QtGui.QGridLayout(self)
        layout.setContentsMargins(20,20,20,20)
        layout.setSpacing(10)

        self.label_edge1 = QtGui.QLabel('')
        self.label_edge1.setMargin(5)
        self.label_edge1.setFrameStyle(QtGui.QFrame.Panel | QtGui.QFrame.Sunken)
        layout.addWidget(self.label_edge1, 0, 0, 10, 10)
        self.label_edge1.show()

        self.label_avgVol = QtGui.QLabel('Test')
        self.label_avgVol.setMargin(5)
        self.label_avgVol.setFrameStyle(QtGui.QFrame.Box | QtGui.QFrame.Sunken)
        self.label_avgVol.setAlignment(QtCore.Qt.AlignCenter | QtCore.Qt.AlignVCenter)
        layout.addWidget(self.label_avgVol, 0, 0, 1, 10)
        self.label_avgVol.show()



        self.groupscroll = QtGui.QHBoxLayout()
        self.groupscrollbox = QtGui.QGroupBox()



        self.viz1 = Mayavi_Scene()
        self.ui1 = self.viz1.edit_traits(parent=self, kind='subpanel').control

        self.MVB = QtGui.QVBoxLayout()
        self.MVB.addWidget(self.ui1)

        scroll = QtGui.QScrollArea()
        widget = QtGui.QWidget(self)
        widget.setLayout(QtGui.QHBoxLayout())
        widget.layout().addWidget(self.groupscrollbox)
        scroll.setWidget(widget)
        scroll.setWidgetResizable(True)
        self.groupscrollbox.setLayout(self.MVB)
        self.groupscroll.addWidget(scroll)



        layout.addWidget(scroll, 1, 1, 1, 9)



class P2(QtGui.QWidget):    
    def __init__(self, parent=None):
        super(P2, self).__init__(parent)
        layout = QtGui.QGridLayout(self)
        layout.setContentsMargins(20,20,20,20)
        layout.setSpacing(10)

class MainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setGeometry(50, 50, 500, 500)   

        tab1 = P1(self)
        tab2 = P2(self)

        self.tabs = QtGui.QTabWidget(self)
        self.tabs.resize(250,150)

        self.tabs.addTab(tab1, 'Page 1')
        self.tabs.addTab(tab2, 'Page 2')

        self.setWindowTitle('SCROLLBAR ERROR EXAMPLE')


        self.setCentralWidget(self.tabs)
        self.show()

if __name__ == '__main__':
    app = QtGui.QApplication.instance()
    w = MainWindow()
    sys.exit(app.exec_())

在这种情况下，滚动条位于选项卡内部而不是外部。然后你会得到这样的结果：

但我不确定这是不是你想要的。你知道吗