如何从 keyPressEvent 中获取 F1 或 F2 等字母值？

Question

I want to print key value like ['a', 'b', ... , 'f11', 'f12']

def keyPressEvent(self,e):
    print(e.key())

but when i press f1, the function key, then it printed the value 16777264. how can i convert 16777264 to f1?

Answer 1

key() returns an int that can be matched using the QtCore.Qt.Key enum.

Qt provides F key identifiers up to F35, so you can build a simple map and check it in the key event.

class FKeyTest(QtWidgets.QWidget):
    fKeys = {}
    for f in range(1, 36):
        fKeys[getattr(QtCore.Qt, 'Key_F{}'.format(f))] = 'F{}'.format(f)

    def keyPressEvent(self, event):
        key = self.fKeys.get(event.key())
        if key:
            print(key)

Answer 2

Compare it with the QtCore.Qt.Key enum. See here .

if e.key() == QtCore.Qt.Key_F1:

Also, if you want the name of an arbitrary key press, you can use this:

from PyQt5.QtCore import Qt
keys = {}
for key, value in vars(Qt).items():
    if isinstance(value, Qt.Key):
        keys[value] = key

keys[16777264]
>>> 'Key_F1'