Add 03-02-04-03.

QCheckBox-信号

03-QtWidgets-常用控件/02-Button-按钮控件/04-QCheckBox-复选框/03-QCheckBox-信号.py

@@ -0,0 +1,47 @@
+import sys
+
+from PySide6 import QtCore, QtGui, QtWidgets
+from PySide6.QtCore import Qt
+
+"""
+QCheckBox 信号
+QCheckBox除了继承父类QAbstractButton提供的信号，只有一个可用信号
+
+QCheckBox.stateChanged -> int  选中状态改变时发射此信号，新的选中状态作为参数传出，见Qt.CheckState
+"""
+
+
+class MyWidget(QtWidgets.QWidget):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.setWindowTitle("QCheckBox-信号")
+        self.resize(800, 600)
+        self.setup_ui()
+        self.test_01()
+
+    def setup_ui(self) -> None:
+        """设置界面"""
+        self.cb = QtWidgets.QCheckBox("PySide6", self)
+        self.cb.move(320, 200)
+        self.cb.setTristate(True)
+
+    def test_01(self) -> None:
+        """测试信号"""
+
+        @QtCore.Slot(int)
+        def test_slot(state: int) -> None:
+            if state == Qt.Checked:
+                print("复选框被选中了！")
+            elif state == Qt.Unchecked:
+                print("复选框被取消选中了！")
+            elif state == Qt.PartiallyChecked:
+                print("复选框被部分选中！")
+
+        self.cb.stateChanged.connect(test_slot)  # type: ignore
+
+
+if __name__ == "__main__":
+    app = QtWidgets.QApplication(sys.argv)
+    window = MyWidget()
+    window.show()
+    sys.exit(app.exec())