Python 2.7 在pyqt中,如何打印;Ctrl+;“关键”;在QLineEdit中,按Ctrl+;任意键
这里是我的kode,我为QLineEdit生成了一个事件,将按下的组合键放入文本行中,Shift键和Alt键可以,但Ctrl键不行。为什么Python 2.7 在pyqt中,如何打印;Ctrl+;“关键”;在QLineEdit中,按Ctrl+;任意键,python-2.7,pyqt4,Python 2.7,Pyqt4,这里是我的kode,我为QLineEdit生成了一个事件,将按下的组合键放入文本行中,Shift键和Alt键可以,但Ctrl键不行。为什么 #!/usr/bin/python import sys from PyQt4.QtCore import * from PyQt4.QtGui import * def main(): app = QApplication(sys.argv) w = MyWindow() w.show() sys.exit(app.ex
#!/usr/bin/python
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
def main():
app = QApplication(sys.argv)
w = MyWindow()
w.show()
sys.exit(app.exec_())
class MyWindow(QWidget):
def __init__(self, *args):
QWidget.__init__(self, *args)
self.la = QLabel("Press tab in this box:")
self.le = MyLineEdit()
layout = QVBoxLayout()
layout.addWidget(self.la)
layout.addWidget(self.le)
self.setLayout(layout)
self.connect(self.le, SIGNAL("press"),
self.update)
def update(self):
oldText = str(self.le.text())
self.le.setText(self.le.myText)
class MyLineEdit(QLineEdit):
def __init__(self, *args):
QLineEdit.__init__(self, *args)
self.myText = ""
def event(self, event):
if event.type() == QEvent.KeyPress:
if event.modifiers() & Qt.ControlModifier :
print event.text()
self.myText = "Ctrl+"+ event.text()
self.emit(SIGNAL("press"))
return True
return QLineEdit.event(self, event)
if __name__ == "__main__":
main()
在文本行中,我可以通过变量self.myText值在文本行中输入Shift键和Alt键,但不能在Ctrl键中输入。为什么
#!/usr/bin/python
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
def main():
app = QApplication(sys.argv)
w = MyWindow()
w.show()
sys.exit(app.exec_())
class MyWindow(QWidget):
def __init__(self, *args):
QWidget.__init__(self, *args)
self.la = QLabel("Press tab in this box:")
self.le = MyLineEdit()
layout = QVBoxLayout()
layout.addWidget(self.la)
layout.addWidget(self.le)
self.setLayout(layout)
self.connect(self.le, SIGNAL("press"),
self.update)
def update(self):
oldText = str(self.le.text())
self.le.setText(self.le.myText)
class MyLineEdit(QLineEdit):
def __init__(self, *args):
QLineEdit.__init__(self, *args)
self.myText = ""
def event(self, event):
if event.type() == QEvent.KeyPress:
if event.modifiers() & Qt.ControlModifier :
print event.text()
self.myText = "Ctrl+"+ event.text()
self.emit(SIGNAL("press"))
return True
return QLineEdit.event(self, event)
if __name__ == "__main__":
main()
当我们使用key()方法返回键的int值时,我们可以使用unichr()函数将int转换为char
原始示例不起作用的原因是,许多Ctrl+组合键会生成控制字符,例如Ctrl+J会生成换行符 捕获键盘组合的正确方法是使用,它适用于所有键,包括功能键、箭头键、页面上/下键等。您还可以使用来获取转换后的快捷键 以下是基于原始示例的演示:
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
def main():
app = QApplication(sys.argv)
w = MyWindow()
w.show()
sys.exit(app.exec_())
class MyWindow(QWidget):
def __init__(self, *args):
QWidget.__init__(self, *args)
self.la = QLabel("Press tab in this box:")
self.le = MyLineEdit()
layout = QVBoxLayout()
layout.addWidget(self.la)
layout.addWidget(self.le)
self.setLayout(layout)
self.le.keyPressed.connect(self.update)
def update(self, text):
self.le.setText(text)
MOD_MASK = (Qt.CTRL | Qt.ALT | Qt.SHIFT | Qt.META)
class MyLineEdit(QLineEdit):
keyPressed = pyqtSignal(str)
def keyPressEvent(self, event):
keyname = ''
key = event.key()
modifiers = int(event.modifiers())
if (modifiers and modifiers & MOD_MASK == modifiers and
key > 0 and key != Qt.Key_Shift and key != Qt.Key_Alt and
key != Qt.Key_Control and key != Qt.Key_Meta):
keyname = QKeySequence(modifiers + key).toString()
print('event.text(): %r' % event.text())
print('event.key(): %d, %#x, %s' % (key, key, keyname))
self.keyPressed.emit(keyname)
if __name__ == "__main__":
main()
非常感谢您的回答,以及如何能够捕获Ctrl+Alt+key、Ctrl+Shift+key、Alt+key、Alt+Shift+key@Tigran84. 我更新了我的答案。行编辑将只接受包含
MOD|u MASK
中修饰符的组合键。很抱歉,我从未见过这种分配MOD|u MASK=(Qt.CTRL | Qt.ALT | Qt.SHIFT | Qt.META),我可以在其中阅读this@Tigran84. 这只是一组正在或将在一起的标志(括号不起任何作用)。对不起,我的英语技能很差,我不明白这个网站是如何工作的