diff -r 561e97413395 -r f325dfdc8f6b Snapshot/SnapshotTimer.py
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Snapshot/SnapshotTimer.py Mon Apr 09 17:02:31 2012 +0200
@@ -0,0 +1,117 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2012 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing the snapshot timer widget.
+"""
+
+from PyQt4.QtCore import pyqtSignal, Qt, QTimer, QRect
+from PyQt4.QtGui import QWidget, QApplication, QPainter, QToolTip, QPalette
+
+
+class SnapshotTimer(QWidget):
+ """
+ Class implementing the snapshot timer widget.
+
+ @signal timeout() emitted after the timer timed out
+ """
+ timeout = pyqtSignal()
+
+ def __init__(self):
+ """
+ Constructor
+ """
+ super().__init__(None)
+
+ self.setWindowFlags(Qt.WindowStaysOnTopHint | Qt.FramelessWindowHint |
+ Qt.X11BypassWindowManagerHint)
+
+ self.__timer = QTimer()
+ self.__textRect = QRect()
+ self.__time = 0
+ self.__length = 0
+ self.__toggle = True
+
+ # text is taken from paintEvent with maximum number plus some margin
+ self.resize(
+ self.fontMetrics().width(
+ self.trUtf8("Snapshot will be taken in %n seconds", "", 99)) + 6,
+ self.fontMetrics().height() + 4)
+
+ self.__timer.timeout.connect(self.__bell)
+
+ def start(self, seconds):
+ """
+ Public method to start the timer.
+
+ @param seconds timeout value (integer)
+ """
+ screenGeom = QApplication.desktop().screenGeometry()
+ self.move(screenGeom.width() // 2 - self.size().width() // 2, screenGeom.top())
+ self.__toggle = True
+ self.__time = 0
+ self.__length = seconds
+ self.__timer.start(1000)
+ self.show()
+
+ def stop(self):
+ """
+ Public method to stop the timer.
+ """
+ self.setVisible(False)
+ self.hide()
+ self.__timer.stop()
+
+ def __bell(self):
+ """
+ Private slot handling timer timeouts.
+ """
+ if self.__time == self.__length - 1:
+ self.hide()
+ else:
+ if self.__time == self.__length:
+ self.__timer.stop()
+ self.timeout.emit()
+
+ self.__time += 1
+ self.__toggle = not self.__toggle
+ self.update()
+
+ def paintEvent(self, evt):
+ """
+ Protected method handling paint events.
+
+ @param evt paint event (QPaintEvent)
+ """
+ painter = QPainter(self)
+
+ if self.__time < self.__length:
+ pal = QToolTip.palette()
+ textBackgroundColor = pal.color(QPalette.Active, QPalette.Base)
+ if self.__toggle:
+ textColor = pal.color(QPalette.Active, QPalette.Text)
+ else:
+ textColor = pal.color(QPalette.Active, QPalette.Base)
+ painter.setPen(textColor)
+ painter.setBrush(textBackgroundColor)
+ helpText = self.trUtf8("Snapshot will be taken in %n seconds", "",
+ self.__length - self.__time)
+ textRect = painter.boundingRect(self.rect().adjusted(2, 2, -2, -2),
+ Qt.AlignHCenter | Qt.TextSingleLine, helpText)
+ painter.drawText(textRect, Qt.AlignHCenter | Qt.TextSingleLine, helpText)
+
+ def enterEvent(self, evt):
+ """
+ Protected method handling the mouse cursor entering the widget.
+
+ @param evt enter event (QEvent)
+ """
+ screenGeom = QApplication.desktop().screenGeometry()
+ if self.x() == screenGeom.left():
+ self.move(
+ screenGeom.x() + (screenGeom.width() // 2 - self.size().width() // 2),
+ screenGeom.top())
+ else:
+ self.move(screenGeom.topLeft())
