133 lines
4.1 KiB
Python
133 lines
4.1 KiB
Python
from __future__ import annotations
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from PySide6.QtCore import Qt, QEvent
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from PySide6.QtGui import QPalette
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from PySide6.QtWidgets import QWidget, QVBoxLayout, QLabel, QPushButton
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class LockOverlay(QWidget):
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def __init__(self, parent: QWidget, on_unlock: callable):
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"""
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Widget that 'locks' the screen after a configured idle time.
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"""
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super().__init__(parent)
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self.setObjectName("LockOverlay")
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self.setAttribute(Qt.WA_StyledBackground, True)
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self.setFocusPolicy(Qt.StrongFocus)
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self.setGeometry(parent.rect())
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self._styling = False # <-- reentrancy guard
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self._last_dark: bool | None = None
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lay = QVBoxLayout(self)
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lay.addStretch(1)
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msg = QLabel("Locked due to inactivity", self)
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msg.setObjectName("lockLabel")
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msg.setAlignment(Qt.AlignCenter)
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self._btn = QPushButton("Unlock", self)
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self._btn.setObjectName("unlockButton")
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self._btn.setFixedWidth(200)
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self._btn.setCursor(Qt.PointingHandCursor)
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self._btn.setAutoDefault(True)
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self._btn.setDefault(True)
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self._btn.clicked.connect(on_unlock)
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lay.addWidget(msg, 0, Qt.AlignCenter)
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lay.addWidget(self._btn, 0, Qt.AlignCenter)
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lay.addStretch(1)
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self._apply_overlay_style()
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self.hide()
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def _is_dark(self, pal: QPalette) -> bool:
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"""
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Detect if dark mode is in use.
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"""
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c = pal.color(QPalette.Window)
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luma = 0.2126 * c.redF() + 0.7152 * c.greenF() + 0.0722 * c.blueF()
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return luma < 0.5
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def _apply_overlay_style(self):
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if self._styling:
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return
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dark = self._is_dark(self.palette())
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if dark == self._last_dark:
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return
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self._styling = True
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try:
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if dark:
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link = self.palette().color(QPalette.Link)
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accent_hex = link.name() # e.g. "#FFA500"
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r, g, b = link.red(), link.green(), link.blue()
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self.setStyleSheet(
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f"""
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#LockOverlay {{ background-color: rgb(0,0,0); }}
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#LockOverlay QLabel#lockLabel {{ color: {accent_hex}; font-weight: 600; }}
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#LockOverlay QPushButton#unlockButton {{
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color: {accent_hex};
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background-color: rgba({r},{g},{b},0.10);
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border: 1px solid {accent_hex};
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border-radius: 8px;
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padding: 8px 16px;
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}}
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#LockOverlay QPushButton#unlockButton:hover {{
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background-color: rgba({r},{g},{b},0.16);
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border-color: {accent_hex};
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}}
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#LockOverlay QPushButton#unlockButton:pressed {{
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background-color: rgba({r},{g},{b},0.24);
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}}
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#LockOverlay QPushButton#unlockButton:focus {{
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outline: none;
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border-color: {accent_hex};
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}}
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"""
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)
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else:
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# (light mode unchanged)
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self.setStyleSheet(
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"""
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#LockOverlay { background-color: rgba(0,0,0,120); }
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#LockOverlay QLabel#lockLabel { color: palette(window-text); font-weight: 600; }
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#LockOverlay QPushButton#unlockButton {
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color: palette(button-text);
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background-color: rgba(255,255,255,0.92);
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border: 1px solid rgba(0,0,0,0.25);
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border-radius: 8px;
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padding: 8px 16px;
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}
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#LockOverlay QPushButton#unlockButton:hover {
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background-color: rgba(255,255,255,1.0);
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border-color: rgba(0,0,0,0.35);
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}
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#LockOverlay QPushButton#unlockButton:pressed {
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background-color: rgba(245,245,245,1.0);
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}
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#LockOverlay QPushButton#unlockButton:focus {
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outline: none;
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border-color: palette(highlight);
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}
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"""
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)
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self._last_dark = dark
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finally:
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self._styling = False
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def changeEvent(self, ev):
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super().changeEvent(ev)
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# Only re-style on palette flips (user changed theme)
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if ev.type() in (QEvent.PaletteChange, QEvent.ApplicationPaletteChange):
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self._apply_overlay_style()
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def eventFilter(self, obj, event):
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if obj is self.parent() and event.type() in (QEvent.Resize, QEvent.Show):
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self.setGeometry(obj.rect())
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return False
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def showEvent(self, e):
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super().showEvent(e)
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self._btn.setFocus()
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