Screen.py

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#!/usr/bin/env python3
""" @brief   Physical display (Screen and monitors).                                """
 
#============================================================================#
# EVOLIFE  http://evolife.telecom-paris.fr             Jean-Louis Dessalles  #
# Telecom Paris  2022-04-11                                www.dessalles.fr  #
# -------------------------------------------------------------------------- #
# License:  Creative Commons BY-NC-SA                                        #
#============================================================================#
# Documentation: https://evolife.telecom-paris.fr/Classes                    #
#============================================================================#
 
 
 
try:    from PyQt5 import QtWidgets
except ImportError:             # compatibility with PyQt4
        from PyQt4 import QtGui as QtWidgets
 
class Screen_:
    """ Stores characteristics of physical display 
    """
    
    def __init__(self, MainApp):
        """ Stores available physical screens
        """
        self.width = 1920   # will be changed
        self.height = 1080  # will be changed
        self.ratio = 1      # comparison with default screen
        screen_rect = MainApp.desktop().screenGeometry()
        self.ratio = screen_rect.width() / self.width
        self.width, self.height = screen_rect.width(), screen_rect.height()
        self.displays = []
        for Disp in range(0,8):
            D = QtWidgets.QDesktopWidget().screenGeometry(Disp)
            if D:   self.displays.append(D)
            else:   break
        self.currentScreen = 0
        # print(self.displays)
        
    def resize(self, *Coord):
        """ applies screen's display ratio to coordinates
        """
        return list(map(lambda x: int(x * self.ratio), Coord))
        
    def locate(self, *Coord):
        """ calls 'resize' (for high definition screen and optional screen change)
        """
        return self.changeScreen(list(self.resize(*Coord)))
    
    def switchScreen(self):
        """ Chave the value of 'currentScreen'
        """
        self.currentScreen = len(self.displays) - self.currentScreen - 1
    
    def changeScreen(self, Coord):
        """ translates coordinates to display on current screen
        """
        # print('Change coordinates:', Coord, end=' ')
        Coord = [Coord[0] + self.displays[self.currentScreen].left(), 
                 Coord[1] + self.displays[self.currentScreen].top()] \
                 + Coord[2:]
        # print('to ', Coord)
        return Coord
        
__author__ = 'Dessalles'