HYTOS

# coding: utf-8

""" This is engineering freeze item module """

import os.path

import copy, sys

try:

    from PyQt5.QtCore import *

    from PyQt5.QtGui import *

    from PyQt5.QtWidgets import *

except ImportError:

    try:

        from PyQt4.QtCore import Qt, QRectF, pyqtSignal, QT_VERSION_STR

        from PyQt4.QtGui import QGraphicsView, QGraphicsScene, QImage, QPixmap, QPainterPath, QFileDialog

    except ImportError:

        raise ImportError("ImageViewerQt: Requires PyQt5 or PyQt4.")

"""

    A {FreezeItem} is the graphical representation of a {LineNo.Freeze}.

"""

class QEngineeringFreezeItem(QGraphicsRectItem):

    """ This is engineering freeze item class """

    FREEZE_SIZE = 16

    def __init__(self, x, y, width, height):

        QGraphicsRectItem.__init__(self, x, y, width, height)

        self.__shadow = QGraphicsDropShadowEffect(blurRadius=20, offset=QPointF(0, 0))

        self.setGraphicsEffect(self.__shadow)

        self.__shadow.setEnabled(True)

        self.setFlags(QGraphicsItem.ItemIsSelectable)

        self.setToolTip('Freeze')

    def mouseDoubleClickEvent(self, event, isDataList=False):

        """ toggle freeze value """

        line_no = self.parentItem()

        freeze = not line_no.prop('Freeze')

        line_no.set_property('Freeze', freeze)

        self.update_freeze(freeze)

    def update_freeze(self, freeze):

        """ update graphics with given freeze value """

        self.setBrush(Qt.gray) if freeze else self.setBrush(Qt.white)

        self.update()