#!/usr/bin/env python
# coding: utf-8

# #  Qt Demo
# 
# This will launch various Qt compatible packages
# 
# Nota: as of 2019-05-26th, PySide2-5.13+ compatibility is
#  - Ok for Qtconsole, Qtpy, pyzo, wppm, PyQtgraph, rx
#  - ToDo for Spyder, guidata, guiqwt
# 

# ## Qt4 & Qt5 Dedicated Graphic libraries: PyQtgraph, guidata, guiqwt

# In[ ]:


# PyQtgraph (Scientific Graphics and GUI Library for Python)
import pyqtgraph.examples; pyqtgraph.examples.run()


# In[ ]:


# Guidata (Python library generating graphical user interfaces for easy dataset editing and display)
from guidata import tests; tests.run()


# In[ ]:


# Guiqwt (Efficient 2D plotting Python library based on PythonQwt)
from guiqwt import tests; tests.run()


# In[ ]:


#QtDemo (if present)
get_ipython().system('if exist "%WINPYDIR%\\Lib\\site-packages\\PyQt5\\examples\\qtdemo\\qtdemo.py"  "%WINPYDIR%\\python.exe" "%WINPYDIR%\\Lib\\site-packages\\PyQt5\\examples\\qtdemo\\qtdemo.py"')
get_ipython().system('if exist "%WINPYDIR%\\Lib\\site-packages\\PyQt4\\examples\\demos\\qtdemo\\qtdemo.pyw""%WINPYDIR%\\pythonw.exe" "%WINPYDIR%\\Lib\\site-packages\\PyQt4\\examples\\demos\\qtdemo\\qtdemo.pyw"')
get_ipython().system('if exist "%WINPYDIR%\\Lib\\site-packages\\PySide2\\examples\\datavisualization" "%WINPYDIR%\\python.exe" "%WINPYDIR%\\Lib\\site-packages\\PySide2\\examples\\datavisualization\\bars3d.py"')


# ## Reactive programing: rx

# In[ ]:


# from https://github.com/ReactiveX/RxPY/blob/master/examples/timeflie
import sys

import rx
from rx import operators as ops
from rx.subjects import Subject
from rx.concurrency.mainloopscheduler import QtScheduler

try:
    from PyQt5 import QtCore
    from PyQt5.QtWidgets import QApplication, QWidget, QLabel
except ImportError:
    try:
        from PySide2 import QtCore
        from PySide2.QtWidgets import QApplication, QLabel, QWidget
    except ImportError:
        raise ImportError('Please ensure either PyQT5 or PySide2 is available!')


class Window(QWidget):

    def __init__(self):
        QWidget.__init__(self)
        self.setWindowTitle("Rx for Python rocks")
        self.resize(600, 600)
        self.setMouseTracking(True)

        # This Subject is used to transmit mouse moves to labels
        self.mousemove = Subject()

    def mouseMoveEvent(self, event):
        self.mousemove.on_next((event.x(), event.y()))


def main():
    app = QApplication(sys.argv)
    scheduler = QtScheduler(QtCore)

    window = Window()
    window.show()

    text = 'TIME FLIES LIKE AN ARROW'

    def on_next(info):
        label, (x, y), i = info
        label.move(x + i*12 + 15, y)
        label.show()

    def handle_label(label, i):
        delayer = ops.delay(i * 0.100)
        mapper = ops.map(lambda xy: (label, xy, i))

        return window.mousemove.pipe(
            delayer,
            mapper,
            )

    labeler = ops.flat_map_indexed(handle_label)
    mapper = ops.map(lambda c: QLabel(c, window))

    rx.from_(text).pipe(
        mapper,
        labeler,
    ).subscribe(on_next, on_error=print, scheduler=scheduler)

    sys.exit(app.exec_())


if __name__ == '__main__':
    main()


# In[ ]:


get_ipython().system('pip download --dest  C:\\WinP\\a QtPy')


# In[ ]: