summaryrefslogtreecommitdiff
path: root/silx/gui/data/RecordTableView.py
diff options
context:
space:
mode:
authorPicca Frédéric-Emmanuel <picca@synchrotron-soleil.fr>2017-08-18 14:48:52 +0200
committerPicca Frédéric-Emmanuel <picca@synchrotron-soleil.fr>2017-08-18 14:48:52 +0200
commitf7bdc2acff3c13a6d632c28c4569690ab106eed7 (patch)
tree9d67cdb7152ee4e711379e03fe0546c7c3b97303 /silx/gui/data/RecordTableView.py
Import Upstream version 0.5.0+dfsg
Diffstat (limited to 'silx/gui/data/RecordTableView.py')
-rw-r--r--silx/gui/data/RecordTableView.py405
1 files changed, 405 insertions, 0 deletions
diff --git a/silx/gui/data/RecordTableView.py b/silx/gui/data/RecordTableView.py
new file mode 100644
index 0000000..ce6a178
--- /dev/null
+++ b/silx/gui/data/RecordTableView.py
@@ -0,0 +1,405 @@
+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2017 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 define model and widget to display 1D slices from numpy
+array using compound data types or hdf5 databases.
+"""
+from __future__ import division
+
+import itertools
+import numpy
+from silx.gui import qt
+import silx.io
+from .TextFormatter import TextFormatter
+from silx.gui.widgets.TableWidget import CopySelectedCellsAction
+
+__authors__ = ["V. Valls"]
+__license__ = "MIT"
+__date__ = "27/01/2017"
+
+
+class _MultiLineItem(qt.QItemDelegate):
+ """Draw a multiline text without hiding anything.
+
+ The paint method display a cell without any wrap. And an editor is
+ available to scroll into the selected cell.
+ """
+
+ def __init__(self, parent=None):
+ """
+ Constructor
+
+ :param qt.QWidget parent: Parent of the widget
+ """
+ qt.QItemDelegate.__init__(self, parent)
+ self.__textOptions = qt.QTextOption()
+ self.__textOptions.setFlags(qt.QTextOption.IncludeTrailingSpaces |
+ qt.QTextOption.ShowTabsAndSpaces)
+ self.__textOptions.setWrapMode(qt.QTextOption.NoWrap)
+ self.__textOptions.setAlignment(qt.Qt.AlignTop | qt.Qt.AlignLeft)
+
+ def paint(self, painter, option, index):
+ """
+ Write multiline text without using any wrap or any alignment according
+ to the cell size.
+
+ :param qt.QPainter painter: Painter context used to displayed the cell
+ :param qt.QStyleOptionViewItem option: Control how the editor is shown
+ :param qt.QIndex index: Index of the data to display
+ """
+ painter.save()
+
+ # set colors
+ painter.setPen(qt.QPen(qt.Qt.NoPen))
+ if option.state & qt.QStyle.State_Selected:
+ brush = option.palette.highlight()
+ painter.setBrush(brush)
+ else:
+ brush = index.data(qt.Qt.BackgroundRole)
+ if brush is None:
+ # default background color for a cell
+ brush = qt.Qt.white
+ painter.setBrush(brush)
+ painter.drawRect(option.rect)
+
+ if index.isValid():
+ if option.state & qt.QStyle.State_Selected:
+ brush = option.palette.highlightedText()
+ else:
+ brush = index.data(qt.Qt.ForegroundRole)
+ if brush is None:
+ brush = option.palette.text()
+ painter.setPen(qt.QPen(brush.color()))
+ text = index.data(qt.Qt.DisplayRole)
+ painter.drawText(qt.QRectF(option.rect), text, self.__textOptions)
+
+ painter.restore()
+
+ def createEditor(self, parent, option, index):
+ """
+ Returns the widget used to edit the item specified by index for editing.
+
+ We use it not to edit the content but to show the content with a
+ convenient scroll bar.
+
+ :param qt.QWidget parent: Parent of the widget
+ :param qt.QStyleOptionViewItem option: Control how the editor is shown
+ :param qt.QIndex index: Index of the data to display
+ """
+ if not index.isValid():
+ return super(_MultiLineItem, self).createEditor(parent, option, index)
+
+ editor = qt.QTextEdit(parent)
+ editor.setReadOnly(True)
+ return editor
+
+ def setEditorData(self, editor, index):
+ """
+ Read data from the model and feed the editor.
+
+ :param qt.QWidget editor: Editor widget
+ :param qt.QIndex index: Index of the data to display
+ """
+ text = index.model().data(index, qt.Qt.EditRole)
+ editor.setText(text)
+
+ def updateEditorGeometry(self, editor, option, index):
+ """
+ Update the geometry of the editor according to the changes of the view.
+
+ :param qt.QWidget editor: Editor widget
+ :param qt.QStyleOptionViewItem option: Control how the editor is shown
+ :param qt.QIndex index: Index of the data to display
+ """
+ editor.setGeometry(option.rect)
+
+
+class RecordTableModel(qt.QAbstractTableModel):
+ """This data model provides access to 1D slices from numpy array using
+ compound data types or hdf5 databases.
+
+ Each entries are displayed in a single row, and each columns contain a
+ specific field of the compound type.
+
+ It also allows to display 1D arrays of simple data types.
+ array.
+
+ :param qt.QObject parent: Parent object
+ :param numpy.ndarray data: A numpy array or a h5py dataset
+ """
+ def __init__(self, parent=None, data=None):
+ qt.QAbstractTableModel.__init__(self, parent)
+
+ self.__data = None
+ self.__is_array = False
+ self.__fields = None
+ self.__formatter = None
+ self.__editFormatter = None
+ self.setFormatter(TextFormatter(self))
+
+ # set _data
+ self.setArrayData(data)
+
+ # Methods to be implemented to subclass QAbstractTableModel
+ def rowCount(self, parent_idx=None):
+ """Returns number of rows to be displayed in table"""
+ if self.__data is None:
+ return 0
+ elif not self.__is_array:
+ return 1
+ else:
+ return len(self.__data)
+
+ def columnCount(self, parent_idx=None):
+ """Returns number of columns to be displayed in table"""
+ if self.__fields is None:
+ return 1
+ else:
+ return len(self.__fields)
+
+ def data(self, index, role=qt.Qt.DisplayRole):
+ """QAbstractTableModel method to access data values
+ in the format ready to be displayed"""
+ if not index.isValid():
+ return None
+
+ if self.__data is None:
+ return None
+
+ if self.__is_array:
+ if index.row() >= len(self.__data):
+ return None
+ data = self.__data[index.row()]
+ else:
+ if index.row() > 0:
+ return None
+ data = self.__data
+
+ if self.__fields is not None:
+ if index.column() >= len(self.__fields):
+ return None
+ key = self.__fields[index.column()][1]
+ data = data[key[0]]
+ if len(key) > 1:
+ data = data[key[1]]
+
+ if role == qt.Qt.DisplayRole:
+ return self.__formatter.toString(data)
+ elif role == qt.Qt.EditRole:
+ return self.__editFormatter.toString(data)
+ return None
+
+ def headerData(self, section, orientation, role=qt.Qt.DisplayRole):
+ """Returns the 0-based row or column index, for display in the
+ horizontal and vertical headers"""
+ if section == -1:
+ # PyQt4 send -1 when there is columns but no rows
+ return None
+
+ if role == qt.Qt.DisplayRole:
+ if orientation == qt.Qt.Vertical:
+ if not self.__is_array:
+ return "Scalar"
+ else:
+ return str(section)
+ if orientation == qt.Qt.Horizontal:
+ if self.__fields is None:
+ if section == 0:
+ return "Data"
+ else:
+ return None
+ else:
+ if section < len(self.__fields):
+ return self.__fields[section][0]
+ else:
+ return None
+ return None
+
+ def flags(self, index):
+ """QAbstractTableModel method to inform the view whether data
+ is editable or not.
+ """
+ return qt.QAbstractTableModel.flags(self, index)
+
+ def setArrayData(self, data):
+ """Set the data array and the viewing perspective.
+
+ You can set ``copy=False`` if you need more performances, when dealing
+ with a large numpy array. In this case, a simple reference to the data
+ is used to access the data, rather than a copy of the array.
+
+ .. warning::
+
+ Any change to the data model will affect your original data
+ array, when using a reference rather than a copy..
+
+ :param data: 1D numpy array, or any object that can be
+ converted to a numpy array using ``numpy.array(data)`` (e.g.
+ a nested sequence).
+ """
+ if qt.qVersion() > "4.6":
+ self.beginResetModel()
+
+ self.__data = data
+ if isinstance(data, numpy.ndarray):
+ self.__is_array = True
+ elif silx.io.is_dataset(data) and data.shape != tuple():
+ self.__is_array = True
+ else:
+ self.__is_array = False
+
+
+ self.__fields = []
+ if data is not None:
+ if data.dtype.fields is not None:
+ for name, (dtype, _index) in data.dtype.fields.items():
+ if dtype.shape != tuple():
+ keys = itertools.product(*[range(x) for x in dtype.shape])
+ for key in keys:
+ label = "%s%s" % (name, list(key))
+ array_key = (name, key)
+ self.__fields.append((label, array_key))
+ else:
+ self.__fields.append((name, (name,)))
+ else:
+ self.__fields = None
+
+ if qt.qVersion() > "4.6":
+ self.endResetModel()
+ else:
+ self.reset()
+
+ def arrayData(self):
+ """Returns the internal data.
+
+ :rtype: numpy.ndarray of h5py.Dataset
+ """
+ return self.__data
+
+ def setFormatter(self, formatter):
+ """Set the formatter object to be used to display data from the model
+
+ :param TextFormatter formatter: Formatter to use
+ """
+ if formatter is self.__formatter:
+ return
+
+ if qt.qVersion() > "4.6":
+ self.beginResetModel()
+
+ if self.__formatter is not None:
+ self.__formatter.formatChanged.disconnect(self.__formatChanged)
+
+ self.__formatter = formatter
+ self.__editFormatter = TextFormatter(formatter)
+ self.__editFormatter.setUseQuoteForText(False)
+
+ if self.__formatter is not None:
+ self.__formatter.formatChanged.connect(self.__formatChanged)
+
+ if qt.qVersion() > "4.6":
+ self.endResetModel()
+ else:
+ self.reset()
+
+ def getFormatter(self):
+ """Returns the text formatter used.
+
+ :rtype: TextFormatter
+ """
+ return self.__formatter
+
+ def __formatChanged(self):
+ """Called when the format changed.
+ """
+ self.__editFormatter = TextFormatter(self, self.getFormatter())
+ self.__editFormatter.setUseQuoteForText(False)
+ self.reset()
+
+
+class _ShowEditorProxyModel(qt.QIdentityProxyModel):
+ """
+ Allow to custom the flag edit of the model
+ """
+
+ def __init__(self, parent=None):
+ """
+ Constructor
+
+ :param qt.QObject arent: parent object
+ """
+ super(_ShowEditorProxyModel, self).__init__(parent)
+ self.__forceEditable = False
+
+ def flags(self, index):
+ flag = qt.QIdentityProxyModel.flags(self, index)
+ if self.__forceEditable:
+ flag = flag | qt.Qt.ItemIsEditable
+ return flag
+
+ def forceCellEditor(self, show):
+ """
+ Enable the editable flag to allow to display cell editor.
+ """
+ if self.__forceEditable == show:
+ return
+ self.beginResetModel()
+ self.__forceEditable = show
+ self.endResetModel()
+
+
+class RecordTableView(qt.QTableView):
+ """TableView using DatabaseTableModel as default model.
+ """
+ def __init__(self, parent=None):
+ """
+ Constructor
+
+ :param qt.QWidget parent: parent QWidget
+ """
+ qt.QTableView.__init__(self, parent)
+
+ model = _ShowEditorProxyModel(self)
+ model.setSourceModel(RecordTableModel())
+ self.setModel(model)
+ self.__multilineView = _MultiLineItem(self)
+ self.setEditTriggers(qt.QAbstractItemView.AllEditTriggers)
+ self._copyAction = CopySelectedCellsAction(self)
+ self.addAction(self._copyAction)
+
+ def copy(self):
+ self._copyAction.trigger()
+
+ def setArrayData(self, data):
+ self.model().sourceModel().setArrayData(data)
+ if data is not None:
+ if issubclass(data.dtype.type, (numpy.string_, numpy.unicode_)):
+ # TODO it would be nice to also fix fields
+ # but using it only for string array is already very useful
+ self.setItemDelegateForColumn(0, self.__multilineView)
+ self.model().forceCellEditor(True)
+ else:
+ self.setItemDelegateForColumn(0, None)
+ self.model().forceCellEditor(False)