#####################################################################
# #
# /splash.py #
# #
# Copyright 2018, Christopher Billington #
# #
# This file is part of labscript_utils, in the labscript suite #
# (see http://labscriptsuite.org), and is licensed under the #
# Simplified BSD License. See the license.txt file in the root of #
# the project for the full license. #
# #
#####################################################################
import sys
from labscript_utils import dedent
try:
from qtutils.qt import QtWidgets, QtCore, QtGui, QT_ENV
except ImportError as e:
if 'DLL load failed' in str(e):
msg = """Failed to load Qt DLL. This can be caused by application shortcuts
not being configured to activate conda environments. Try running the
following from within the activated conda environment to fix the shortcuts:
desktop-app install blacs lyse runmanager runviewer"""
raise ImportError(dedent(msg))
raise
Qt = QtCore.Qt
# These are default in Qt6 and print a warning if set
if QT_ENV == 'PyQt5':
# Set auto high-DPI scaling - this ensures pixel metrics are scaled
# appropriately so that we don't get a weird mix of large fonts and small
# everything else on High DPI displays:
QtWidgets.QApplication.setAttribute(Qt.AA_EnableHighDpiScaling, True)
# Use high res pixmaps if available, instead of rendering at low resolution and
# upscaling:
QtWidgets.QApplication.setAttribute(Qt.AA_UseHighDpiPixmaps, True)
[docs]
class Splash(QtWidgets.QFrame):
w = 250
h = 230
imwidth = 150
imheight = 150
alpha = 0.875
icon_frac = 0.65
BG = '#ffffff'
FG = '#000000'
[docs]
def __init__(self, imagepath):
self.qapplication = QtWidgets.QApplication.instance()
if self.qapplication is None:
self.qapplication = QtWidgets.QApplication(sys.argv)
super().__init__()
self.icon = QtGui.QPixmap()
self.icon.load(imagepath)
if self.icon.isNull():
raise ValueError("Invalid image file: {}.\n".format(imagepath))
self.icon = self.icon.scaled(
self.imwidth, self.imheight, Qt.AspectRatioMode.KeepAspectRatio, Qt.TransformationMode.SmoothTransformation
)
self.text = 'Loading'
self.setWindowFlags(Qt.WindowType.SplashScreen)
self.setWindowOpacity(self.alpha)
self.label = QtWidgets.QLabel(self.text)
self.setStyleSheet(f"color: {self.FG}; background-color: {self.BG}; font-size: 10pt")
# Frame not necessary on macos, and looks ugly.
if sys.platform != 'darwin':
self.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
self.label.setWordWrap(True)
self.label.setAlignment(Qt.AlignmentFlag.AlignCenter)
self.resize(self.w, self.h)
image_label = QtWidgets.QLabel()
image_label.setPixmap(self.icon)
image_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
layout = QtWidgets.QVBoxLayout(self)
layout.addWidget(image_label)
layout.addWidget(self.label)
self._paint_pending = False
[docs]
def paintEvent(self, event):
self._paint_pending = False
return super().paintEvent(event)
[docs]
def update_text(self, text):
self.text = text
self.label.setText(text)
self._paint_pending = True
while self._paint_pending:
QtCore.QCoreApplication.processEvents(QtCore.QEventLoop.ProcessEventsFlag.AllEvents)
QtCore.QCoreApplication.sendPostedEvents()
if __name__ == '__main__':
import time
icon = '../../runmanager/runmanager/runmanager.svg'
splash = Splash(icon)
splash.show()
time.sleep(1)
splash.update_text('frombulating the dooberwhackies')
time.sleep(1)
splash.update_text(
'The quick brown fox jumped over the lazy dog to get to the other side'
)
time.sleep(1)
splash.hide()