colorDialog.py

# Copyright (c) <2015-Present> Tzutalin
# Copyright (C) 2013  MIT, Computer Science and Artificial Intelligence Laboratory. Bryan Russell, Antonio Torralba,
# William T. Freeman. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
# associated documentation files (the "Software"), to deal in the Software without restriction, including without
# limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
# Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of
# the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
# NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
# CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
try:
    from PyQt5.QtGui import *
    from PyQt5.QtCore import *
    from PyQt5.QtWidgets import QColorDialog, QDialogButtonBox
except ImportError:
    from PyQt4.QtGui import *
    from PyQt4.QtCore import *

BB = QDialogButtonBox


class ColorDialog(QColorDialog):

    def __init__(self, parent=None):
        super(ColorDialog, self).__init__(parent)
        self.setOption(QColorDialog.ShowAlphaChannel)
        # The Mac native dialog does not support our restore button.
        self.setOption(QColorDialog.DontUseNativeDialog)
        # Add a restore defaults button.
        # The default is set at invocation time, so that it
        # works across dialogs for different elements.
        self.default = None
        self.bb = self.layout().itemAt(1).widget()
        self.bb.addButton(BB.RestoreDefaults)
        self.bb.clicked.connect(self.checkRestore)

    def getColor(self, value=None, title=None, default=None):
        self.default = default
        if title:
            self.setWindowTitle(title)
        if value:
            self.setCurrentColor(value)
        return self.currentColor() if self.exec_() else None

    def checkRestore(self, button):
        if self.bb.buttonRole(button) & BB.ResetRole and self.default:
            self.setCurrentColor(self.default)