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# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2017-2018 European Synchrotron Radiation Facility
#
# 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.
#
# ###########################################################################*/
"""
This module provides the :class:`SceneWidget` content and parameters model.
"""
from __future__ import absolute_import, division
__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "11/01/2018"
import weakref
from ... import qt
from .core import BaseRow
from .items import Settings, nodeFromItem
def visitQAbstractItemModel(model, parent=qt.QModelIndex()):
"""Iterate over indices in the model starting from parent
It iterates column by column and row by row
(i.e., from left to right and from top to bottom).
Parent are returned before their children.
It only iterates through the children for the first column of a row.
:param QAbstractItemModel model: The model to visit
:param QModelIndex parent:
Index from which to start visiting the model.
Default: start from the root
"""
assert isinstance(model, qt.QAbstractItemModel)
assert isinstance(parent, qt.QModelIndex)
assert parent.model() is model or not parent.isValid()
for row in range(model.rowCount(parent)):
for column in range(model.columnCount(parent)):
index = model.index(row, column, parent)
yield index
index = model.index(row, 0, parent)
for index in visitQAbstractItemModel(model, index):
yield index
class Root(BaseRow):
"""Root node of :class:`SceneWidget` parameters.
It has two children:
- Settings
- Scene group
"""
def __init__(self, model, sceneWidget):
super(Root, self).__init__()
self._sceneWidget = weakref.ref(sceneWidget)
self.setParent(model) # Needed for Root
def children(self):
sceneWidget = self._sceneWidget()
if sceneWidget is None:
return ()
else:
return super(Root, self).children()
class SceneModel(qt.QAbstractItemModel):
"""Model of a :class:`SceneWidget`.
:param SceneWidget parent: The SceneWidget this model represents.
"""
def __init__(self, parent):
self._sceneWidget = weakref.ref(parent)
super(SceneModel, self).__init__(parent)
self._root = Root(self, parent)
self._root.addRow(Settings(parent))
self._root.addRow(nodeFromItem(parent.getSceneGroup()))
def sceneWidget(self):
"""Returns the :class:`SceneWidget` this model represents.
In case the widget has already been deleted, it returns None
:rtype: SceneWidget
"""
return self._sceneWidget()
def _itemFromIndex(self, index):
"""Returns the corresponding :class:`Node` or :class:`Item3D`.
:param QModelIndex index:
:rtype: Node or Item3D
"""
return index.internalPointer() if index.isValid() else self._root
def index(self, row, column, parent=qt.QModelIndex()):
"""See :meth:`QAbstractItemModel.index`"""
if column >= self.columnCount(parent) or row >= self.rowCount(parent):
return qt.QModelIndex()
item = self._itemFromIndex(parent)
return self.createIndex(row, column, item.children()[row])
def parent(self, index):
"""See :meth:`QAbstractItemModel.parent`"""
if not index.isValid():
return qt.QModelIndex()
item = self._itemFromIndex(index)
parent = item.parent()
ancestor = parent.parent()
if ancestor is not self: # root node
children = ancestor.children()
row = children.index(parent)
return self.createIndex(row, 0, parent)
return qt.QModelIndex()
def rowCount(self, parent=qt.QModelIndex()):
"""See :meth:`QAbstractItemModel.rowCount`"""
item = self._itemFromIndex(parent)
return item.rowCount()
def columnCount(self, parent=qt.QModelIndex()):
"""See :meth:`QAbstractItemModel.columnCount`"""
item = self._itemFromIndex(parent)
return item.columnCount()
def data(self, index, role=qt.Qt.DisplayRole):
"""See :meth:`QAbstractItemModel.data`"""
item = self._itemFromIndex(index)
column = index.column()
return item.data(column, role)
def setData(self, index, value, role=qt.Qt.EditRole):
"""See :meth:`QAbstractItemModel.setData`"""
item = self._itemFromIndex(index)
column = index.column()
if item.setData(column, value, role):
self.dataChanged.emit(index, index)
return True
return False
def flags(self, index):
"""See :meth:`QAbstractItemModel.flags`"""
item = self._itemFromIndex(index)
column = index.column()
return item.flags(column)
def headerData(self, section, orientation, role=qt.Qt.DisplayRole):
"""See :meth:`QAbstractItemModel.headerData`"""
if orientation == qt.Qt.Horizontal and role == qt.Qt.DisplayRole:
return 'Item' if section == 0 else 'Value'
else:
return None
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