from math import sqrt

try:
    from PyQt5 import QtCore
    from PyQt5 import QtGui
    from PyQt5 import QtWidgets
except ImportError:
    from PyQt4 import QtCore
    from PyQt4 import QtGui
    from PyQt4 import QtGui as QtWidgets


def newIcon(icon):
    return QtGui.QIcon(':/' + icon)


def newButton(text, icon=None, slot=None):
    b = QtWidgets.QPushButton(text)
    if icon is not None:
        b.setIcon(newIcon(icon))
    if slot is not None:
        b.clicked.connect(slot)
    return b


def newAction(parent, text, slot=None, shortcut=None, icon=None,
              tip=None, checkable=False, enabled=True):
    """Create a new action and assign callbacks, shortcuts, etc."""
    a = QtGui.QAction(text, parent)
    if icon is not None:
        a.setIcon(newIcon(icon))
    if shortcut is not None:
        if isinstance(shortcut, (list, tuple)):
            a.setShortcuts(shortcut)
        else:
            a.setShortcut(shortcut)
    if tip is not None:
        a.setToolTip(tip)
        a.setStatusTip(tip)
    if slot is not None:
        a.triggered.connect(slot)
    if checkable:
        a.setCheckable(True)
    a.setEnabled(enabled)
    return a


def addActions(widget, actions):
    for action in actions:
        if action is None:
            widget.addSeparator()
        elif isinstance(action, QtGui.QMenu):
            widget.addMenu(action)
        else:
            widget.addAction(action)


def labelValidator():
    return QtGui.QRegExpValidator(QtCore.QRegExp(r'^[^ \t].+'), None)


class struct(object):
    def __init__(self, **kwargs):
        self.__dict__.update(kwargs)


def distance(p):
    return sqrt(p.x() * p.x() + p.y() * p.y())


def fmtShortcut(text):
    mod, key = text.split('+', 1)
    return '<b>%s</b>+<b>%s</b>' % (mod, key)