item_delegates.py

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#!/usr/bin/env python
 
# Copyright (c) 2011, Dorian Scholz, TU Darmstadt
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
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#   * Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
#   * Redistributions in binary form must reproduce the above
#     copyright notice, this list of conditions and the following
#     disclaimer in the documentation and/or other materials provided
#     with the distribution.
#   * Neither the name of the TU Darmstadt nor the names of its
#     contributors may be used to endorse or promote products derived
#     from this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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from python_qt_binding.QtCore import QModelIndex
from python_qt_binding.QtWidgets import QDoubleSpinBox, QItemDelegate
 
 
class SpinBoxDelegate(QItemDelegate):
 
    def __init__(self, min_value=0, max_value=100, decimals=2, *args):
        self._min = min_value
        self._max = max_value
        self._decimals = decimals
        super(SpinBoxDelegate, self).__init__(*args)
 
    def createEditor(self, parent, option, index):
        editor = QDoubleSpinBox(parent)
        editor.setDecimals(self._decimals)
        editor.setMaximum(self._min)
        editor.setMaximum(self._max)
        return editor
 
 
class DelegateUtil(object):
 
    """
    Find out the hierarchy level of the selected item.
    see: http://stackoverflow.com/a/4208240/577001
 
    :type model_index: QModelIndex
    :rtype: int
 
    :author: Isaac Saito
    """
    @staticmethod
    def _get_hierarchy_level(model_index):
        hierarchyLevel = 1
        seek_root = model_index
        while(seek_root.parent() != QModelIndex()):
            seek_root = seek_root.parent()
            hierarchyLevel += 1
        return hierarchyLevel