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Diffstat (limited to 'silx/gui/data/Hdf5TableView.py')
-rw-r--r-- | silx/gui/data/Hdf5TableView.py | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/silx/gui/data/Hdf5TableView.py b/silx/gui/data/Hdf5TableView.py new file mode 100644 index 0000000..5d79907 --- /dev/null +++ b/silx/gui/data/Hdf5TableView.py @@ -0,0 +1,414 @@ +# 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 + +__authors__ = ["V. Valls"] +__license__ = "MIT" +__date__ = "07/04/2017" + +import functools +import os.path +import logging +from silx.gui import qt +import silx.io +from .TextFormatter import TextFormatter +import silx.gui.hdf5 +from silx.gui.widgets import HierarchicalTableView + +_logger = logging.getLogger(__name__) + + +class _CellData(object): + """Store a table item + """ + def __init__(self, value=None, isHeader=False, span=None): + """ + Constructor + + :param str value: Label of this property + :param bool isHeader: True if the cell is an header + :param tuple span: Tuple of row, column span + """ + self.__value = value + self.__isHeader = isHeader + self.__span = span + + def isHeader(self): + """Returns true if the property is a sub-header title. + + :rtype: bool + """ + return self.__isHeader + + def value(self): + """Returns the value of the item. + """ + return self.__value + + def span(self): + """Returns the span size of the cell. + + :rtype: tuple + """ + return self.__span + + +class _TableData(object): + """Modelize a table with header, row and column span. + + It is mostly defined as a row based table. + """ + + def __init__(self, columnCount): + """Constructor. + + :param int columnCount: Define the number of column of the table + """ + self.__colCount = columnCount + self.__data = [] + + def rowCount(self): + """Returns the number of rows. + + :rtype: int + """ + return len(self.__data) + + def columnCount(self): + """Returns the number of columns. + + :rtype: int + """ + return self.__colCount + + def clear(self): + """Remove all the cells of the table""" + self.__data = [] + + def cellAt(self, row, column): + """Returns the cell at the row column location. Else None if there is + nothing. + + :rtype: _CellData + """ + if row < 0: + return None + if column < 0: + return None + if row >= len(self.__data): + return None + cells = self.__data[row] + if column >= len(cells): + return None + return cells[column] + + def addHeaderRow(self, headerLabel): + """Append the table with header on the full row. + + :param str headerLabel: label of the header. + """ + item = _CellData(value=headerLabel, isHeader=True, span=(1, self.__colCount)) + self.__data.append([item]) + + def addHeaderValueRow(self, headerLabel, value): + """Append the table with a row using the first column as an header and + other cells as a single cell for the value. + + :param str headerLabel: label of the header. + :param object value: value to store. + """ + header = _CellData(value=headerLabel, isHeader=True) + value = _CellData(value=value, span=(1, self.__colCount)) + self.__data.append([header, value]) + + def addRow(self, *args): + """Append the table with a row using arguments for each cells + + :param list[object] args: List of cell values for the row + """ + row = [] + for value in args: + if not isinstance(value, _CellData): + value = _CellData(value=value) + row.append(value) + self.__data.append(row) + + +class Hdf5TableModel(HierarchicalTableView.HierarchicalTableModel): + """This data model provides access to HDF5 node content (File, Group, + Dataset). Main info, like name, file, attributes... are displayed + """ + + def __init__(self, parent=None, data=None): + """ + Constructor + + :param qt.QObject parent: Parent object + :param object data: An h5py-like object (file, group or dataset) + """ + super(Hdf5TableModel, self).__init__(parent) + + self.__obj = None + self.__data = _TableData(columnCount=4) + self.__formatter = None + formatter = TextFormatter(self) + self.setFormatter(formatter) + self.setObject(data) + + def rowCount(self, parent_idx=None): + """Returns number of rows to be displayed in table""" + return self.__data.rowCount() + + def columnCount(self, parent_idx=None): + """Returns number of columns to be displayed in table""" + return self.__data.columnCount() + + 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 + + cell = self.__data.cellAt(index.row(), index.column()) + if cell is None: + return None + + if role == self.SpanRole: + return cell.span() + elif role == self.IsHeaderRole: + return cell.isHeader() + elif role == qt.Qt.DisplayRole: + value = cell.value() + if callable(value): + value = value(self.__obj) + return str(value) + 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 isSupportedObject(self, h5pyObject): + """ + Returns true if the provided object can be modelized using this model. + """ + isSupported = False + isSupported = isSupported or silx.io.is_group(h5pyObject) + isSupported = isSupported or silx.io.is_dataset(h5pyObject) + isSupported = isSupported or isinstance(h5pyObject, silx.gui.hdf5.H5Node) + return isSupported + + def setObject(self, h5pyObject): + """Set the h5py-like object exposed by the model + + :param h5pyObject: A h5py-like object. It can be a `h5py.Dataset`, + a `h5py.File`, a `h5py.Group`. It also can be a, + `silx.gui.hdf5.H5Node` which is needed to display some local path + information. + """ + if qt.qVersion() > "4.6": + self.beginResetModel() + + if h5pyObject is None or self.isSupportedObject(h5pyObject): + self.__obj = h5pyObject + else: + _logger.warning("Object class %s unsupported. Object ignored.", type(h5pyObject)) + self.__initProperties() + + if qt.qVersion() > "4.6": + self.endResetModel() + else: + self.reset() + + def __initProperties(self): + """Initialize the list of available properties according to the defined + h5py-like object.""" + self.__data.clear() + if self.__obj is None: + return + + obj = self.__obj + + hdf5obj = obj + if isinstance(obj, silx.gui.hdf5.H5Node): + hdf5obj = obj.h5py_object + + if silx.io.is_file(hdf5obj): + objectType = "File" + elif silx.io.is_group(hdf5obj): + objectType = "Group" + elif silx.io.is_dataset(hdf5obj): + objectType = "Dataset" + else: + objectType = obj.__class__.__name__ + self.__data.addHeaderRow(headerLabel="HDF5 %s" % objectType) + self.__data.addHeaderRow(headerLabel="Path info") + + self.__data.addHeaderValueRow("basename", lambda x: os.path.basename(x.name)) + self.__data.addHeaderValueRow("name", lambda x: x.name) + if silx.io.is_file(obj): + self.__data.addHeaderValueRow("filename", lambda x: x.filename) + + if isinstance(obj, silx.gui.hdf5.H5Node): + # helpful informations if the object come from an HDF5 tree + self.__data.addHeaderValueRow("local_basename", lambda x: x.local_basename) + self.__data.addHeaderValueRow("local_name", lambda x: x.local_name) + self.__data.addHeaderValueRow("local_filename", lambda x: x.local_file.filename) + + if hasattr(obj, "dtype"): + self.__data.addHeaderRow(headerLabel="Data info") + self.__data.addHeaderValueRow("dtype", lambda x: x.dtype) + if hasattr(obj, "shape"): + self.__data.addHeaderValueRow("shape", lambda x: x.shape) + if hasattr(obj, "size"): + self.__data.addHeaderValueRow("size", lambda x: x.size) + if hasattr(obj, "chunks") and obj.chunks is not None: + self.__data.addHeaderValueRow("chunks", lambda x: x.chunks) + + # relative to compression + # h5py expose compression, compression_opts but are not initialized + # for external plugins, then we use id + # h5py also expose fletcher32 and shuffle attributes, but it is also + # part of the filters + if hasattr(obj, "shape") and hasattr(obj, "id"): + dcpl = obj.id.get_create_plist() + if dcpl.get_nfilters() > 0: + self.__data.addHeaderRow(headerLabel="Compression info") + pos = _CellData(value="Position", isHeader=True) + hdf5id = _CellData(value="HDF5 ID", isHeader=True) + name = _CellData(value="Name", isHeader=True) + options = _CellData(value="Options", isHeader=True) + self.__data.addRow(pos, hdf5id, name, options) + for index in range(dcpl.get_nfilters()): + callback = lambda index, dataIndex, x: self.__get_filter_info(x, index)[dataIndex] + pos = _CellData(value=functools.partial(callback, index, 0)) + hdf5id = _CellData(value=functools.partial(callback, index, 1)) + name = _CellData(value=functools.partial(callback, index, 2)) + options = _CellData(value=functools.partial(callback, index, 3)) + self.__data.addRow(pos, hdf5id, name, options) + + if hasattr(obj, "attrs"): + if len(obj.attrs) > 0: + self.__data.addHeaderRow(headerLabel="Attributes") + for key in sorted(obj.attrs.keys()): + callback = lambda key, x: self.__formatter.toString(x.attrs[key]) + self.__data.addHeaderValueRow(headerLabel=key, value=functools.partial(callback, key)) + + def __get_filter_info(self, dataset, filterIndex): + """Get a tuple of readable info from dataset filters + + :param h5py.Dataset dataset: A h5py dataset + :param int filterId: + """ + try: + dcpl = dataset.id.get_create_plist() + info = dcpl.get_filter(filterIndex) + filterId, _flags, cdValues, name = info + name = self.__formatter.toString(name) + options = " ".join([self.__formatter.toString(i) for i in cdValues]) + return (filterIndex, filterId, name, options) + except Exception: + _logger.debug("Backtrace", exc_info=True) + return [filterIndex, None, None, None] + + def object(self): + """Returns the internal object modelized. + + :rtype: An h5py-like object + """ + return self.__obj + + 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 + 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.reset() + + +class Hdf5TableView(HierarchicalTableView.HierarchicalTableView): + """A widget to display metadata about a HDF5 node using a table.""" + + def __init__(self, parent=None): + super(Hdf5TableView, self).__init__(parent) + self.setModel(Hdf5TableModel(self)) + + def isSupportedData(self, data): + """ + Returns true if the provided object can be modelized using this model. + """ + return self.model().isSupportedObject(data) + + def setData(self, data): + """Set the h5py-like object exposed by the model + + :param h5pyObject: A h5py-like object. It can be a `h5py.Dataset`, + a `h5py.File`, a `h5py.Group`. It also can be a, + `silx.gui.hdf5.H5Node` which is needed to display some local path + information. + """ + self.model().setObject(data) + header = self.horizontalHeader() + if qt.qVersion() < "5.0": + setResizeMode = header.setResizeMode + else: + setResizeMode = header.setSectionResizeMode + setResizeMode(0, qt.QHeaderView.Fixed) + setResizeMode(1, qt.QHeaderView.Stretch) + header.setStretchLastSection(True) |