PyQt4 - 如何禁用所有热键（本机键盘快捷键）

Question

我有一个PyQt4 GUI，里面有很多库（比如Mayavi），这些库本身就有自己的内部键盘快捷键（已经存在而没有输入任何代码来设置它们）。一个这样的关键是Mayavi的s - 如果你在悬停在Mayavi图上时按下这个按钮，将出现一个保存窗口。更糟糕的是，在悬停时按下字母p将完全冻结该窗口上的所有相机控件。

我在4月份发了一篇关于如何在这些嵌入式库（Mayavi）中关闭这些快捷方式的类似帖子 - 然而，5个月之后，似乎这样的知识非常难以捉摸。

非常感谢任何有关此事的帮助。

更新：我根据论坛反馈编辑了原帖 - 非常抱歉混淆了这个问题;希望下面的代码更清楚：

import sys, os
from pyface.qt import QtGui, QtCore
os.environ['ETS_TOOLKIT'] = 'qt4'
from traits.api import HasTraits,Instance,on_trait_change,Int
from traitsui.api import View,Item,VGroup
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)

        self.label_avgVol = QtGui.QLabel('PyQt window without Mayavi')
        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, 3)
        self.label_avgVol.show()

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

        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, 4, 3)
        self.label_edge1.show()

        self.label_avgVol = QtGui.QLabel('PyQt window with Mayavi')
        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, 3)
        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, 1)

        self.button = QtGui.QPushButton("Test", self)
        layout.addWidget(self.button, 2, 1, 1, 1)
        self.button.show()


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

        tab1 = P1(self)
        tab2 = P2(self)
        global tabs
        tabs = QtGui.QTabWidget(self)
        tabs.addTab(tab1, 'eventFilter works')
        tabs.addTab(tab2, 'eventFilter ignored')
        self.setCentralWidget(tabs)
        self.show()

        self.installEventFilter(self)

    def eventFilter(self, source, event):
        if event.type() == QtCore.QEvent.KeyPress:
            print('KeyPress: %s [%r]' % (event.key(), source))
            return True
            #event.ignore()

        return super(MainWindow, self).eventFilter(source, event)

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