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import sys
from datetime import datetime

from PySide6.QtWidgets import (
    QApplication, QMainWindow, QDialog, QPushButton, QWidget,
    QHBoxLayout, QVBoxLayout, QTextEdit, QDialogButtonBox, QLabel,
)


class DemoDialog(QDialog):
    """用于演示生命周期的对话框：把自身的事件转发到主窗口的日志框。"""

    def __init__(self, log_fn, parent=None):
        super().__init__(parent)
        self._log = log_fn
        self.setWindowTitle("Dialog")
        self.resize(300, 160)

        layout = QVBoxLayout(self)

        tip = QLabel("点击下方按钮，观察主窗口文本框中的事件日志")
        tip.setWordWrap(True)
        layout.addWidget(tip)

        box = QDialogButtonBox()
        btn_accept = box.addButton("接受(accept)", QDialogButtonBox.ButtonRole.AcceptRole)
        btn_reject = box.addButton("拒绝(reject)", QDialogButtonBox.ButtonRole.RejectRole)
        btn_hide = box.addButton("隐藏(hide)", QDialogButtonBox.ButtonRole.ActionRole)
        btn_close = box.addButton("关闭(close)", QDialogButtonBox.ButtonRole.DestructiveRole)
        layout.addWidget(box)

        # accept()/reject() 在非模态 show() 下等价于 hide()（仅隐藏，不销毁）
        btn_accept.clicked.connect(self.accept)
        btn_reject.clicked.connect(self.reject)
        btn_hide.clicked.connect(self.hide)
        btn_close.clicked.connect(self.close)

    # ---- 生命周期事件：重写以便记录到主窗口日志 ----
    def showEvent(self, event):
        self._log("Dialog.showEvent -> 对话框显示")
        super().showEvent(event)

    def hideEvent(self, event):
        self._log("Dialog.hideEvent -> 对话框隐藏")
        super().hideEvent(event)

    def closeEvent(self, event):
        self._log("Dialog.closeEvent -> 对话框关闭（默认仅隐藏，不销毁）")
        super().closeEvent(event)


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("主窗口")
        self.resize(400, 400)

        self.dialog = None  # 复用的对话框实例

        central = QWidget(self)
        self.setCentralWidget(central)
        layout = QVBoxLayout(central)

        # 顶部：两个按钮
        btn_row = QWidget()
        btn_layout = QHBoxLayout(btn_row)
        self.btn_new = QPushButton("show() 打开新 Dialog")
        self.btn_reuse = QPushButton("show() 重新打开隐藏的 Dialog")
        btn_layout.addWidget(self.btn_new)
        btn_layout.addWidget(self.btn_reuse)
        layout.addWidget(btn_row)

        # 底部：文本框（只读，用于展示 Dialog 的事件操作）
        self.log_edit = QTextEdit()
        self.log_edit.setReadOnly(True)
        layout.addWidget(self.log_edit, stretch=1)

        self.btn_new.clicked.connect(self.open_new_dialog)
        self.btn_reuse.clicked.connect(self.reopen_dialog)

        self.log("主窗口已启动")

    def log(self, msg):
        ts = datetime.now().strftime("%H:%M:%S")
        self.log_edit.append(f"[{ts}] {msg}")

    def open_new_dialog(self):
        # 每次新建一个 Dialog 实例，并用非模态的 show() 打开
        dlg = DemoDialog(self.log, self)
        self.dialog = dlg
        self.log("调用 dlg.show() 打开新的 Dialog（非模态）")
        dlg.show()

    def reopen_dialog(self):
        # 复用上一次创建的实例，演示对已隐藏/已关闭 Dialog 再次 show()
        if self.dialog is None:
            self.log("还没有创建过 Dialog，请先点击「show() 打开新 Dialog」")
            return
        if self.dialog.isVisible():
            self.log("Dialog 当前已可见，show() 不会重复触发 showEvent")
        self.log("调用 dlg.show() 重新打开之前隐藏/关闭的 Dialog")
        self.dialog.show()


app = QApplication(sys.argv)
window = MainWindow()
window.show()
app.exec()

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from PySide6.QtWidgets import QApplication, QMainWindow
from PySide6.QtCore import Qt


app = QApplication([])

window = QMainWindow()
# window.setWindowFlags(Qt.WindowType.Window)
# window.setWindowFlags(Qt.WindowType.Window | Qt.WindowType.FramelessWindowHint)
# window.setWindowFlags(Qt.WindowType.Dialog | Qt.WindowType.WindowStaysOnTopHint)
window.setWindowFlags(Qt.WindowType.Dialog | Qt.WindowType.MacWindowToolBarButtonHint)
window.show()

app.exec()