import sys
from PyQt5.Qt import *
class Window(QWidget):
def __init__(self):
super().__init__()
self.city_dic = {
"北京": {
"东城": "001",
"西城": "002",
"朝阳": "003",
"丰台": "004"
},
"上海": {
"黄埔": "005",
"徐汇": "006",
"长宁": "007",
"静安": "008",
"松江": "009"
},
"广东": {
"广州": "010",
"深圳": "011",
"湛江": "012",
"佛山": "013"
}
}
self.setup_ui()
def setup_ui(self):
self.setWindowTitle("Qt桌面应用程序")
self.resize(300, 300)
self.label = QLabel(self)
self.label.move(50, 20)
self.combo_box_1 = QComboBox(self)
self.combo_box_1.resize(100, 30)
self.combo_box_1.move(0, 50)
self.combo_box_2 = QComboBox(self)
self.combo_box_2.resize(100, 30)
self.combo_box_2.move(100, 50)
self.font_combo_box = QFontComboBox(self)
self.font_combo_box.resize(100, 30)
self.font_combo_box.move(200, 50)
def current_font_changed(font):
for i in self.findChildren(QComboBox):
i.setFont(font)
self.font_combo_box.currentFontChanged.connect(current_font_changed)
def current_index_changed_2(index):
self.label.setText(self.combo_box_2.itemData(index))
self.label.adjustSize()
self.combo_box_2.currentIndexChanged.connect(current_index_changed_2)
def current_index_changed_1(index):
self.combo_box_2.blockSignals(True)
self.combo_box_2.clear()
self.combo_box_2.blockSignals(False)
for x, y in self.city_dic[self.combo_box_1.itemText(index)].items():
self.combo_box_2.addItem(x, y)
self.combo_box_1.currentIndexChanged.connect(current_index_changed_1)
# for i in self.city_dic.keys():
# self.combo_box_1.addItem(i)
self.combo_box_1.addItems(self.city_dic.keys())
if __name__ == '__main__':
app = QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec_())
