Source code for silx.gui.dialog.GroupDialog
# coding: utf-8
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"""This module provides a dialog widget to select a HDF5 group in a
tree.
.. autoclass:: GroupDialog
:members: addFile, addGroup, getSelectedDataUrl, setMode
"""
from silx.gui import qt
from silx.gui.hdf5.Hdf5TreeView import Hdf5TreeView
import silx.io
from silx.io.url import DataUrl
__authors__ = ["P. Knobel"]
__license__ = "MIT"
__date__ = "22/03/2018"
class _Hdf5ItemSelectionDialog(qt.QDialog):
SaveMode = 1
"""Mode used to set the HDF5 item selection dialog to *save* mode.
This adds a text field to type in a new item name."""
LoadMode = 2
"""Mode used to set the HDF5 item selection dialog to *load* mode.
Only existing items of the HDF5 file can be selected in this mode."""
def __init__(self, parent=None):
qt.QDialog.__init__(self, parent)
self.setWindowTitle("HDF5 item selection")
self._tree = Hdf5TreeView(self)
self._tree.setSelectionMode(qt.QAbstractItemView.SingleSelection)
self._tree.activated.connect(self._onActivation)
self._tree.selectionModel().selectionChanged.connect(
self._onSelectionChange)
self._model = self._tree.findHdf5TreeModel()
self._header = self._tree.header()
self._newItemWidget = qt.QWidget(self)
newItemLayout = qt.QVBoxLayout(self._newItemWidget)
self._labelNewItem = qt.QLabel(self._newItemWidget)
self._labelNewItem.setText("Create new item in selected group (optional):")
self._lineEditNewItem = qt.QLineEdit(self._newItemWidget)
self._lineEditNewItem.setToolTip(
"Specify the name of a new item "
"to be created in the selected group.")
self._lineEditNewItem.textChanged.connect(
self._onNewItemNameChange)
newItemLayout.addWidget(self._labelNewItem)
newItemLayout.addWidget(self._lineEditNewItem)
_labelSelectionTitle = qt.QLabel(self)
_labelSelectionTitle.setText("Current selection")
self._labelSelection = qt.QLabel(self)
self._labelSelection.setStyleSheet("color: gray")
self._labelSelection.setWordWrap(True)
self._labelSelection.setText("Select an item")
buttonBox = qt.QDialogButtonBox()
self._okButton = buttonBox.addButton(qt.QDialogButtonBox.Ok)
self._okButton.setEnabled(False)
buttonBox.addButton(qt.QDialogButtonBox.Cancel)
buttonBox.accepted.connect(self.accept)
buttonBox.rejected.connect(self.reject)
vlayout = qt.QVBoxLayout(self)
vlayout.addWidget(self._tree)
vlayout.addWidget(self._newItemWidget)
vlayout.addWidget(_labelSelectionTitle)
vlayout.addWidget(self._labelSelection)
vlayout.addWidget(buttonBox)
self.setLayout(vlayout)
self.setMinimumWidth(400)
self._selectedUrl = None
def _onSelectionChange(self, old, new):
self._updateUrl()
def _onNewItemNameChange(self, text):
self._updateUrl()
def _onActivation(self, idx):
# double-click or enter press
self.accept()
def setMode(self, mode):
"""Set dialog mode DatasetDialog.SaveMode or DatasetDialog.LoadMode
:param mode: DatasetDialog.SaveMode or DatasetDialog.LoadMode
"""
if mode == self.LoadMode:
# hide "Create new item" field
self._lineEditNewItem.clear()
self._newItemWidget.hide()
elif mode == self.SaveMode:
self._newItemWidget.show()
else:
raise ValueError("Invalid DatasetDialog mode %s" % mode)
def addFile(self, path):
"""Add a HDF5 file to the tree.
All groups it contains will be selectable in the dialog.
:param str path: File path
"""
self._model.insertFile(path)
def addGroup(self, group):
"""Add a HDF5 group to the tree. This group and all its subgroups
will be selectable in the dialog.
:param h5py.Group group: HDF5 group
"""
self._model.insertH5pyObject(group)
def _updateUrl(self):
nodes = list(self._tree.selectedH5Nodes())
subgroupName = self._lineEditNewItem.text()
if nodes:
node = nodes[0]
data_path = node.local_name
if subgroupName.lstrip("/"):
if not data_path.endswith("/"):
data_path += "/"
data_path += subgroupName.lstrip("/")
self._selectedUrl = DataUrl(file_path=node.local_filename,
data_path=data_path)
self._okButton.setEnabled(True)
self._labelSelection.setText(
self._selectedUrl.path())
def getSelectedDataUrl(self):
"""Return a :class:`DataUrl` with a file path and a data path.
Return None if the dialog was cancelled.
:return: :class:`silx.io.url.DataUrl` object pointing to the
selected HDF5 item.
"""
return self._selectedUrl
[docs]class GroupDialog(_Hdf5ItemSelectionDialog):
"""This :class:`QDialog` uses a :class:`silx.gui.hdf5.Hdf5TreeView` to
provide a HDF5 group selection dialog.
The information identifying the selected node is provided as a
:class:`silx.io.url.DataUrl`.
Example:
.. code-block:: python
dialog = GroupDialog()
dialog.addFile(filepath1)
dialog.addFile(filepath2)
if dialog.exec_():
print("File path: %s" % dialog.getSelectedDataUrl().file_path())
print("HDF5 group path : %s " % dialog.getSelectedDataUrl().data_path())
else:
print("Operation cancelled :(")
"""
def __init__(self, parent=None):
_Hdf5ItemSelectionDialog.__init__(self, parent)
# customization for groups
self.setWindowTitle("HDF5 group selection")
self._header.setSections([self._model.NAME_COLUMN,
self._model.NODE_COLUMN,
self._model.LINK_COLUMN])
def _onActivation(self, idx):
# double-click or enter press: filter for groups
nodes = list(self._tree.selectedH5Nodes())
node = nodes[0]
if silx.io.is_group(node.h5py_object):
self.accept()
def _updateUrl(self):
# overloaded to filter for groups
nodes = list(self._tree.selectedH5Nodes())
subgroupName = self._lineEditNewItem.text()
if nodes:
node = nodes[0]
if silx.io.is_group(node.h5py_object):
data_path = node.local_name
if subgroupName.lstrip("/"):
if not data_path.endswith("/"):
data_path += "/"
data_path += subgroupName.lstrip("/")
self._selectedUrl = DataUrl(file_path=node.local_filename,
data_path=data_path)
self._okButton.setEnabled(True)
self._labelSelection.setText(
self._selectedUrl.path())
else:
self._selectedUrl = None
self._okButton.setEnabled(False)
self._labelSelection.setText("Select a group")
