#!/usr/bin/env python
# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2016-2018 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
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# furnished to do so, subject to the following conditions:
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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"""This script shows a gallery of simple widgets provided by silx.

It shows the following widgets:

- :class:`~silx.gui.widgets.WaitingPushButton`:
  A button with a progress-like waiting animated icon.
"""

__authors__ = ["V. Valls"]
__license__ = "MIT"
__date__ = "02/08/2018"

import sys
import functools
import numpy

from silx.gui import qt
from silx.gui.colors import Colormap
from silx.gui.widgets.WaitingPushButton import WaitingPushButton
from silx.gui.widgets.ThreadPoolPushButton import ThreadPoolPushButton
from silx.gui.widgets.RangeSlider import RangeSlider
from silx.gui.widgets.LegendIconWidget import LegendIconWidget
from silx.gui.widgets.ElidedLabel import ElidedLabel


class SimpleWidgetExample(qt.QMainWindow):
    """This windows shows simple widget provided by silx."""

    def __init__(self):
        """Constructor"""
        qt.QMainWindow.__init__(self)
        self.setWindowTitle("Silx simple widget example")

        main_panel = qt.QWidget(self)
        main_panel.setLayout(qt.QVBoxLayout())

        layout = main_panel.layout()
        layout.addWidget(qt.QLabel("WaitingPushButton"))
        layout.addWidget(self.createWaitingPushButton())
        layout.addWidget(self.createWaitingPushButton2())

        layout.addWidget(qt.QLabel("ThreadPoolPushButton"))
        layout.addWidget(self.createThreadPoolPushButton())

        layout.addWidget(qt.QLabel("RangeSlider"))
        layout.addWidget(self.createRangeSlider())
        layout.addWidget(self.createRangeSliderWithBackground())

        panel = self.createLegendIconPanel(self)
        layout.addWidget(qt.QLabel("LegendIconWidget"))
        layout.addWidget(panel)

        panel = self.createElidedLabelPanel(self)
        layout.addWidget(qt.QLabel("ElidedLabel"))
        layout.addWidget(panel)

        self.setCentralWidget(main_panel)

    def createWaitingPushButton(self):
        widget = WaitingPushButton(text="Push me and wait for ever")
        widget.clicked.connect(widget.swapWaiting)
        return widget

    def createWaitingPushButton2(self):
        widget = WaitingPushButton(text="Push me")
        widget.setDisabledWhenWaiting(False)
        widget.clicked.connect(widget.swapWaiting)
        return widget

    def printResult(self, result):
        print(result)

    def printError(self, result):
        print("Error")
        print(result)

    def printEvent(self, eventName, *args):
        print("Event %s: %s" % (eventName, args))

    def takesTimeToComputePow(self, a, b):
        qt.QThread.sleep(2)
        return a ** b

    def createThreadPoolPushButton(self):
        widget = ThreadPoolPushButton(text="Compute 2^16")
        widget.setCallable(self.takesTimeToComputePow, 2, 16)
        widget.succeeded.connect(self.printResult)
        widget.failed.connect(self.printError)
        return widget

    def createRangeSlider(self):
        widget = RangeSlider(self)
        widget.setRange(0, 500)
        widget.setValues(100, 400)
        widget.sigValueChanged.connect(functools.partial(self.printEvent, "sigValueChanged"))
        widget.sigPositionChanged.connect(functools.partial(self.printEvent, "sigPositionChanged"))
        widget.sigPositionCountChanged.connect(functools.partial(self.printEvent, "sigPositionCountChanged"))
        return widget

    def createRangeSliderWithBackground(self):
        widget = RangeSlider(self)
        widget.setRange(0, 500)
        widget.setValues(100, 400)
        background = numpy.sin(numpy.arange(250) / 250.0)
        background[0], background[-1] = background[-1], background[0]
        colormap = Colormap("viridis")
        widget.setGroovePixmapFromProfile(background, colormap)
        return widget

    def createLegendIconPanel(self, parent):
        panel = qt.QWidget(parent)
        layout = qt.QVBoxLayout(panel)

        # Empty
        legend = LegendIconWidget(panel)
        layout.addWidget(legend)

        # Line
        legend = LegendIconWidget(panel)
        legend.setLineStyle("-")
        legend.setLineColor("blue")
        legend.setLineWidth(2)
        layout.addWidget(legend)

        # Symbol
        legend = LegendIconWidget(panel)
        legend.setSymbol("o")
        legend.setSymbolColor("red")
        layout.addWidget(legend)

        # Line and symbol
        legend = LegendIconWidget(panel)
        legend.setLineStyle(":")
        legend.setLineColor("green")
        legend.setLineWidth(2)
        legend.setSymbol("x")
        legend.setSymbolColor("violet")
        layout.addWidget(legend)

        # Colormap
        legend = LegendIconWidget(panel)
        legend.setColormap("viridis")
        layout.addWidget(legend)

        # Symbol and colormap
        legend = LegendIconWidget(panel)
        legend.setSymbol("o")
        legend.setSymbolColormap("viridis")
        layout.addWidget(legend)

        # Symbol (without surface) and colormap
        legend = LegendIconWidget(panel)
        legend.setSymbol("+")
        legend.setSymbolColormap("plasma")
        layout.addWidget(legend)

        # Colormap + Line + Symbol
        legend = LegendIconWidget(panel)
        legend.setColormap("gray")
        legend.setLineStyle("-")
        legend.setLineColor("white")
        legend.setLineWidth(3)
        legend.setSymbol(".")
        legend.setSymbolColormap("red")
        layout.addWidget(legend)

        return panel

    def createElidedLabelPanel(self, parent):
        panel = qt.QWidget(parent)
        layout = qt.QVBoxLayout(panel)

        label = ElidedLabel(parent)
        label.setText("A very long text which is far too long.")
        layout.addWidget(label)

        label = ElidedLabel(parent)
        label.setText("A very long text which is far too long.")
        label.setElideMode(qt.Qt.ElideMiddle)
        layout.addWidget(label)

        label = ElidedLabel(parent)
        label.setText("Basically nothing.")
        layout.addWidget(label)

        return panel


def main():
    """
    Main function
    """
    app = qt.QApplication([])
    sys.excepthook = qt.exceptionHandler
    window = SimpleWidgetExample()
    window.show()
    result = app.exec()
    # remove ending warnings relative to QTimer
    app.deleteLater()
    sys.excepthook = sys.__excepthook__
    sys.exit(result)


main()
