如果您不想将子窗口部件集中在任何东西上。如果你只想要主QWidget
,制定儿童无焦点政策;
例如,希望是有帮助的;
import sys
from PyQt4 import QtGui, QtCore
class QCustomWidget (QtGui.QWidget):
def __init__ (self, parent = None):
super(QCustomWidget, self).__init__(parent)
myQLayout = QtGui.QVBoxLayout()
self.my1QPushButton = QtGui.QPushButton('Test 1', self)
self.my2QPushButton = QtGui.QPushButton('Test 2', self)
self.setChildrenFocusPolicy(QtCore.Qt.NoFocus)
myQLayout.addWidget(self.my1QPushButton)
myQLayout.addWidget(self.my2QPushButton)
self.setLayout(myQLayout)
def setChildrenFocusPolicy (self, policy):
def recursiveSetChildFocusPolicy (parentQWidget):
for childQWidget in parentQWidget.findChildren(QtGui.QWidget):
childQWidget.setFocusPolicy(policy)
recursiveSetChildFocusPolicy(childQWidget)
recursiveSetChildFocusPolicy(self)
def keyPressEvent (self, eventQKeyEvent):
messageQMessageBox = QtGui.QMessageBox(QtGui.QMessageBox.Question, 'Question', 'Hello Main', QtGui.QMessageBox.Yes)
messageQMessageBox.exec_()
QtGui.QWidget.keyPressEvent(self, eventQKeyEvent)
appQApplication = QtGui.QApplication(sys.argv)
windowQCustomWidget = QCustomWidget()
windowQCustomWidget.setFixedSize(640, 480)
windowQCustomWidget.show()
sys.exit(appQApplication.exec_())
QWidget.setFocusPolicy(self, Qt.FocusPolicy 策略) 参考 http://pyqt.sourceforge.net/Docs/PyQt4/qwidget.html#setFocusPolicy
FocusPolicy 枚举参考 http://pyqt.sourceforge.net/Docs/PyQt4/qt.html#FocusPolicy-enum
小部件中的当前光标,按下按键后有效。
案例1:纯QWidget
:这种情况下它可以跟踪所有按键,因为焦点是自我QWidget
.
import sys
from PyQt4 import QtGui, QtCore
class QCustomWidget (QtGui.QWidget):
def __init__ (self, parent = None):
super(QCustomWidget, self).__init__(parent)
myQLayout = QtGui.QVBoxLayout()
self.setLayout(myQLayout)
def keyPressEvent (self, eventQKeyEvent):
messageQMessageBox = QtGui.QMessageBox(QtGui.QMessageBox.Question, 'Question', 'Hello', QtGui.QMessageBox.Yes)
messageQMessageBox.exec_()
QtGui.QWidget.keyPressEvent(self, eventQKeyEvent)
appQApplication = QtGui.QApplication(sys.argv)
windowQCustomWidget = QCustomWidget()
windowQCustomWidget.setFixedSize(640, 480)
windowQCustomWidget.show()
sys.exit(appQApplication.exec_())
案例2:添加按钮QWidget
:这种情况无法跟踪箭头键,因为它的焦点按钮和箭头键已通过设置新的焦点位置使用。 (如果您在 Linux 中使用 Windows 风格,您可以看到焦点网格线)
import sys
from PyQt4 import QtGui, QtCore
class QCustomWidget (QtGui.QWidget):
def __init__ (self, parent = None):
super(QCustomWidget, self).__init__(parent)
myQLayout = QtGui.QVBoxLayout()
self.my1QPushButton = QtGui.QPushButton('Test 1', self)
self.my2QPushButton = QtGui.QPushButton('Test 2', self)
myQLayout.addWidget(self.my1QPushButton)
myQLayout.addWidget(self.my2QPushButton)
self.my1QPushButton.keyPressEvent = self.button1KeyPressEvent
self.my2QPushButton.keyPressEvent = self.button2KeyPressEvent
self.setLayout(myQLayout)
def keyPressEvent (self, eventQKeyEvent):
messageQMessageBox = QtGui.QMessageBox(QtGui.QMessageBox.Question, 'Question', 'Hello Main', QtGui.QMessageBox.Yes)
messageQMessageBox.exec_()
QtGui.QWidget.keyPressEvent(self, eventQKeyEvent)
def button1KeyPressEvent (self, eventQKeyEvent):
messageQMessageBox = QtGui.QMessageBox(QtGui.QMessageBox.Question, 'Question', 'Hello Button 1', QtGui.QMessageBox.Yes)
messageQMessageBox.exec_()
QtGui.QPushButton.keyPressEvent(self.my1QPushButton, eventQKeyEvent)
def button2KeyPressEvent (self, eventQKeyEvent):
messageQMessageBox = QtGui.QMessageBox(QtGui.QMessageBox.Question, 'Question', 'Hello Button 2', QtGui.QMessageBox.Yes)
messageQMessageBox.exec_()
QtGui.QPushButton.keyPressEvent(self.my2QPushButton, eventQKeyEvent)
appQApplication = QtGui.QApplication(sys.argv)
windowQCustomWidget = QCustomWidget()
windowQCustomWidget.setFixedSize(640, 480)
windowQCustomWidget.show()
sys.exit(appQApplication.exec_())
我不知道 PyQt 返回的箭头键的 ASCII 是什么,但你可以避免这种情况。在 pyQt 中有 ENUMQtCore.Qt.Key
,你可以阅读类参考资料;
Example:
def keyPressEvent (self, eventQKeyEvent):
key = eventQKeyEvent.key()
if key == QtCore.Qt.Key_F1:
print 'Help'
elif key == QtCore.Qt.Key_F5:
print 'Reload'
elif key == QtCore.Qt.Key_Left:
print 'Left'
elif key == QtCore.Qt.Key_Up:
print 'Up'
elif key == QtCore.Qt.Key_Right:
print 'Right'
elif key == QtCore.Qt.Key_Down:
print 'Down'
也可以看看:Qt.Key ENUM 参考 http://pyqt.sourceforge.net/Docs/PyQt4/qt.html