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https://github.com/muziing/PySide6-Code-Tutorial.git
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89 lines
2.9 KiB
Python
89 lines
2.9 KiB
Python
import sys
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from PySide6 import QtWidgets
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"""
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QComboBox 案例：地区选择
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由2个combobox组成，分别用于选择省、市，选中城市后获得对应的邮政编码
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当第1个combobox的选中改变时，第2个combobox中的选项自动变换至对应列表
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当第2个combobox的选中改变时，使用QLabel显示该地的邮政编码
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"""
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class MyWidget(QtWidgets.QWidget):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.setWindowTitle("QComboBox-案例")
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self.resize(800, 600)
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# 创建存储城市信息的字典
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self.city_dic = {
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"北京": {
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"东城区": "100010",
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"西城区": "100032",
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"朝阳区": "100020",
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"丰台区": "100071",
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"石景山区": "100043",
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"海淀区": "100080",
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},
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"上海": {"黄浦区": "200001", "徐汇区": "200030", "长宁区": "200050"},
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}
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self.setup_ui()
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def setup_ui(self) -> None:
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"""设置界面并初始化"""
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self.province_cbb = QtWidgets.QComboBox()
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self.city_cbb = QtWidgets.QComboBox()
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self.code_label = QtWidgets.QLabel()
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# 使用布局管理器布局控件
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layout = QtWidgets.QHBoxLayout()
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layout.addWidget(self.province_cbb)
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layout.addWidget(self.city_cbb)
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layout.addWidget(self.code_label)
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self.setLayout(layout)
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# 初始化并连接信号
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self.province_cbb.addItems(self.city_dic.keys())
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self.province_cbb.currentTextChanged.connect(self.province_changed) # type: ignore
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self.city_cbb.currentIndexChanged.connect(self.city_changed) # type: ignore
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# 手动执行一次以为城市combobox添加初始项
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self.province_changed(self.province_cbb.currentText())
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def province_changed(self, pro_name: str) -> None:
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"""
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省份改变时的槽函数 \n
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:param pro_name: 新的省名
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:return: None
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"""
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# 先清空之前的条目
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self.city_cbb.clear()
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# 再添加条目
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cities = self.city_dic[pro_name]
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for city_name, city_code in cities.items():
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# 将城市名作为text、邮政代码作为data添加条目
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self.city_cbb.addItem(city_name, city_code)
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def city_changed(self, item_index: int) -> None:
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"""
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城市改变时的槽函数 \n
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:param item_index: 新的选中的条目索引
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:return: None
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"""
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city_name = self.city_cbb.itemText(item_index)
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city_code = self.city_cbb.itemData(item_index)
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self.code_label.setText(f"{city_name}的邮政编码为{city_code}")
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self.code_label.adjustSize() # 调节标签控件尺寸以适应新的内容
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if __name__ == "__main__":
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app = QtWidgets.QApplication(sys.argv)
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window = MyWidget()
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window.show()
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sys.exit(app.exec())
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