具有 3 个不同选项的按钮

Button with 3 different options

有没有办法让一个按钮有两个选项? 我想要一个按钮,在选项一上,按钮会将其颜色更改为红色,在选项二上更改为黄色,在选项三上更改为绿色。再次按下(第 4 次)将从头开始(红色 --> 黄色 --> 绿色)。

到目前为止,我只能为按钮设置 2 个选项,但我创建的 destopapplication 的用户应该有 3 个选项。 到目前为止,这是我的代码(仅供参考:按钮在 QTableWidget 内,因此范围内的 x):

 for x in range(cell_num):
        self.button = QPushButton(' ',self)
        self.button.setFlat(True)
        self.table.setCellWidget(x, 5, self.button)  # lights_button

        self.button.clicked.connect(
            lambda state, w=self.table.cellWidget(x, 5), r=x, c=5: self.button_pushed(w, r, c)
        )



  def button_pushed(self, w, r, c):
        if w.text() != " ":
            w.setIcon(QIcon("..\image\green_button.png"))
            w.setText(" ")
        elif w.text() == "Likes/UnLikes/Normal":
            w.setIcon(QIcon("..\image\yellow_button.png"))
            w.setText(" Likes/Normal")
        else:
            w.setIcon(QIcon("..\image\darkred_button.png"))
            w.setText("  ")

你必须实现一个状态机,在这种情况下最好创建一个自定义按钮。

from itertools import cycle
from PyQt5 import QtCore, QtGui, QtWidgets

class Button(QtWidgets.QPushButton):
    RedState, YellowState, GreenState = range(3)

    def __init__(self, *args, **kwargs):
        super(Button, self).__init__(*args, **kwargs)
        self._current_state = Button.RedState
        self._states = cycle([Button.RedState, Button.YellowState, Button.GreenState])
        self.on_clicked()
        self.clicked.connect(self.on_clicked)

    def update_button(self):
        if self._current_state == Button.RedState:
            self.setIcon(QtGui.QIcon(r"..\image\green_button.png"))
            self.setText(" ")
        elif self._current_state == Button.YellowState:
            self.setIcon(QtGui.QIcon(r"..\image\yellow_button.png"))
            self.setText(" Likes/Normal")
        elif self._current_state == Button.GreenState:
            self.setIcon(QtGui.QIcon(r"..\image\darkred_button.png"))
            self.setText("  ")

    @QtCore.pyqtSlot()
    def on_clicked(self):
        self._current_state = next(self._states)
        self.update_button()

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

        self.table = QtWidgets.QTableWidget(10, 10)
        self.setCentralWidget(self.table)

        for x in range(self.table.rowCount()):
            button = Button(flat=True)
            self.table.setCellWidget(x, 5, button)

if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())