class MainWindow(QWidget):
def __init__(self):
super().__init__()
self.picture_label = None
self.next_button = None
self.picture_pixmap = None
self.init_main_window()
# init the main window of FamilyFrame and set layout
def init_main_window(self):
vLayout = QVBoxLayout()
self.picture_label = QLabel()
self.picture_label.setAlignment(QtCore.Qt.AlignCenter)
vLayout.addWidget(self.picture_label, QtCore.Qt.AlignCenter)
self.next_button = QPushButton('Next ->')
vLayout.addWidget(self.next_button, QtCore.Qt.AlignCenter)
self.picture_pixmap = QPixmap()
self.setLayout(vLayout)
self.setGeometry(0, 0, settings.WIDTH, settings.HEIGHT)
self.setWindowTitle('Family Frame')
self.center()
self.setStyleSheet('background-color: black;')
self.show()
# center window to center of screen
def center(self):
qr = self.frameGeometry()
cp = QDesktopWidget().availableGeometry().center()
qr.moveCenter(cp)
self.move(qr.topLeft())
# update the picture_label's pixmap to the new picture
def update_picture(self, picture):
self.fade_out_label()
self.swap_picture_pixmap(picture)
self.picture_label.setPixmap(self.picture_pixmap)
self.fade_in_label()
def swap_picture_pixmap(self, picture):
pixmap = QPixmap(picture.path_to_file)
fixed_pixmap = pixmap.scaled(settings.WIDTH, settings.HEIGHT,
QtCore.Qt.KeepAspectRatio,
QtCore.Qt.FastTransformation)
self.picture_pixmap.swap(fixed_pixmap)
def fade_out_label(self):
self.picture_label.effect = QGraphicsOpacityEffect()
self.picture_label.setGraphicsEffect(self.picture_label.effect)
self.picture_label.animation = QtCore.QPropertyAnimation(
self.picture_label.effect, b"opacity")
self.picture_label.animation.setDuration(500)
self.picture_label.animation.setStartValue(1)
self.picture_label.animation.setEndValue(0)
self.picture_label.animation.start()
def fade_in_label(self):
self.picture_label.effect = QGraphicsOpacityEffect()
self.picture_label.setGraphicsEffect(self.picture_label.effect)
self.picture_label.animation = QtCore.QPropertyAnimation(
self.picture_label.effect, b"opacity")
self.picture_label.animation.setDuration(500)
self.picture_label.animation.setStartValue(0)
self.picture_label.animation.setEndValue(1)
self.picture_label.animation.start()
def set_picture(self, picture):
self.swap_picture_pixmap(picture)
self.picture_label.setPixmap(self.picture_pixmap)
self.fade_in_label()
