From d5f12417ec369d70921d4a36cbfc722cb459c079 Mon Sep 17 00:00:00 2001
From: muzing <muzi2001@foxmail.com>
Date: Sat, 23 Jul 2022 10:11:35 +0800
Subject: [PATCH] Add 03-11-01-04
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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QComboBox-数据获取
---
 .../01-QComboBox-组合下拉框/04-QComboBox-数据获取.py | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 03-QtWidgets-常用控件/11-ComboBox-下拉框/01-QComboBox-组合下拉框/04-QComboBox-数据获取.py

diff --git a/03-QtWidgets-常用控件/11-ComboBox-下拉框/01-QComboBox-组合下拉框/04-QComboBox-数据获取.py b/03-QtWidgets-常用控件/11-ComboBox-下拉框/01-QComboBox-组合下拉框/04-QComboBox-数据获取.py
new file mode 100644
index 0000000..19d66ae
--- /dev/null
+++ b/03-QtWidgets-常用控件/11-ComboBox-下拉框/01-QComboBox-组合下拉框/04-QComboBox-数据获取.py
@@ -0,0 +1,67 @@
+import sys
+
+from PySide6 import QtWidgets
+
+"""
+QComboBox 数据获取
+除在条目操作1中已经介绍的按索引获取条目信息外，还可以之间获取当前条目等
+
+获取总条目数量
+.count() -> int
+
+获取条目的属性
+.itemData(index: int, role: int = Qt.UserRole) -> QVariant
+.itemDelegate() -> QAbstractItemDelegate
+.itemIcon(index: int) -> QIcon
+.itemText(index: int) -> str
+
+获取当前条目的属性
+.currentData(role: Qt.UserRole) -> QVariant
+.currentIndex() -> int
+.currentText() -> str
+
+查找文本或数据，返回匹配项的索引
+.findText(text: str, flags: Qt.MatchFlags) -> int
+.findData(data: QVariant, role: int = Qt.UserRole, flags: Qt.MatchFlags) -> int
+
+
+"""
+
+
+class MyWidget(QtWidgets.QWidget):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.setWindowTitle("QComboBox-数据获取")
+        self.resize(800, 600)
+        self.setup_ui()
+        self.test()
+
+    def setup_ui(self) -> None:
+        """设置界面"""
+        self.cbb = QtWidgets.QComboBox(self)
+        self.cbb.move(200, 200)
+        self.cbb.resize(400, 60)
+        self.cbb.addItems([str(i) for i in range(100, 110)])  # 通过列表推导式快速添加多个条目
+        self.cbb.addItem("110", {"key": "value"})  # 将一个字典作为Data存入
+
+    def test(self) -> None:
+        """测试获取数据功能"""
+
+        # 获取最后一项的数据
+        print(f"末项数据为：{self.cbb.itemData(self.cbb.count() - 1)}")
+
+        # 测试获取当前项的属性
+        self.cbb.currentIndexChanged.connect(lambda: print(f"当前文本为：{self.cbb.currentText()}"))  # type: ignore
+        self.cbb.currentIndexChanged.connect(lambda: print(f"当前数据为：{self.cbb.currentData()}"))  # type: ignore
+        self.cbb.currentIndexChanged.connect(lambda: print(f"当前索引为：{self.cbb.currentIndex()}"))  # type: ignore
+
+        # 测试查找功能
+        index_102 = self.cbb.findText("102")  # 查找文本为102的项，返回找到的索引
+        print(self.cbb.itemText(index_102))  # 根据索引获取该项的文本
+
+
+if __name__ == "__main__":
+    app = QtWidgets.QApplication(sys.argv)
+    window = MyWidget()
+    window.show()
+    sys.exit(app.exec())