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qbasemodel.py
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qbasemodel.py
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#!/usr/bin/env python
#############################################################################
##
## This file is part of Taurus, a Tango User Interface Library
##
## http://www.tango-controls.org/static/taurus/latest/doc/html/index.html
##
## Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
##
## Taurus is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Taurus is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public License
## along with Taurus. If not, see <http://www.gnu.org/licenses/>.
##
#############################################################################
"""This module provides base widget that displays a Qt view widget envolved
by a toolbar and a status bar (optional)"""
__all__ = ["QBaseModelWidget", "TaurusBaseModelWidget",
"BaseToolBar", "FilterToolBar", "EditorToolBar", "SelectionToolBar",
"RefreshToolBar", "PerspectiveToolBar"]
__docformat__ = 'restructuredtext'
from taurus.external.qt import Qt
from taurus.qt.qtgui.util import ActionFactory
from taurus.qt.qtgui.resource import getIcon, getThemeIcon
from taurus.qt.qtgui.base import TaurusBaseWidget
class BaseToolBar(Qt.QToolBar):
def __init__(self, name=None, view=None, parent=None, designMode=False):
if name is None:
name = "Base toolbar"
self._viewWidget = view or parent
Qt.QToolBar.__init__(self, name, parent)
self.setIconSize(Qt.QSize(16, 16))
self.setFloatable(False)
self.setMovable(False)
def viewWidget(self):
return self._viewWidget
class FilterToolBar(BaseToolBar):
"""Internal widget providing quick filter to be placed in a _QToolArea"""
def __init__(self, view=None, parent=None, designMode=False):
BaseToolBar.__init__(self, name="Taurus filter toolbar", view=view,
parent=parent, designMode=designMode)
filterLineEdit = self._filterLineEdit = Qt.QLineEdit(self)
filterLineEdit.setSizePolicy(Qt.QSizePolicy(Qt.QSizePolicy.Preferred,
Qt.QSizePolicy.Preferred))
filterLineEdit.setToolTip("Quick filter")
Qt.QObject.connect(filterLineEdit,
Qt.SIGNAL("textChanged(const QString &)"),
self.onFilterChanged)
Qt.QObject.connect(filterLineEdit,
Qt.SIGNAL("textEdited(const QString &)"),
self.onFilterEdited)
self.addWidget(filterLineEdit)
af = ActionFactory()
self._clearFilterAction = af.createAction(self, "Clear",
icon=getThemeIcon("edit-clear"),
tip="Clears the filter",
triggered=self.onClearFilter)
self.addAction(self._clearFilterAction)
def getFilterLineEdit(self):
return self._filterLineEdit
def onClearFilter(self):
self.getFilterLineEdit().setText("")
self.emit(Qt.SIGNAL("clearFilterTriggered"))
def onFilterChanged(self, text=None):
text = text or self.getFilterLineEdit().text()
self.emit(Qt.SIGNAL("filterChanged"), text)
def onFilterEdited(self, text=None):
text = text or self.getFilterLineEdit().text()
self.emit(Qt.SIGNAL("filterEdited"), text)
def setFilterText(self, text):
self.getFilterLineEdit().setText(text)
class EditorToolBar(BaseToolBar):
"""Internal widget to be placed in a _QToolArea providing buttons for
moving, adding and removing items from a view based widget"""
def __init__(self, view=None, parent=None, designMode=False):
BaseToolBar.__init__(self, name="Taurus editor toolbar", view=view,
parent=parent, designMode=designMode)
af = ActionFactory()
self._addAction = af.createAction(self, "New item",
icon=getThemeIcon("list-add"),
tip="Add new item",
triggered=self.onAdd)
self._removeAction = af.createAction(self, "Remove item",
icon=getThemeIcon("list-remove"),
tip="Remove item",
triggered=self.onRemove)
self._moveTopAction = af.createAction(self, "To top",
icon=getThemeIcon("go-top"),
tip="Move selected item to top",
triggered=self.onMoveTop)
self._moveUpAction = af.createAction(self, "Move up",
icon=getThemeIcon("go-up"),
tip="Move selected item up one level",
triggered=self.onMoveUp)
self._moveDownAction = af.createAction(self, "Move down",
icon=getThemeIcon("go-down"),
tip="Move selected item down one level",
triggered=self.onMoveDown)
self._moveBottomAction = af.createAction(self, "To bottom",
icon=getThemeIcon("go-bottom"),
tip="Move selected item to bottom",
triggered=self.onMoveBottom)
self.addAction(self._addAction)
self.addAction(self._removeAction)
self.addAction(self._moveTopAction)
self.addAction(self._moveUpAction)
self.addAction(self._moveDownAction)
self.addAction(self._moveBottomAction)
#self.setStyleSheet("QWidget {background : red; }")
def onAdd(self):
self.emit(Qt.SIGNAL("addTriggered"))
def onRemove(self):
self.emit(Qt.SIGNAL("removeTriggered"))
def onMoveTop(self):
self.emit(Qt.SIGNAL("moveTopTriggered"))
def onMoveUp(self):
self.emit(Qt.SIGNAL("moveUpTriggered"))
def onMoveDown(self):
self.emit(Qt.SIGNAL("moveDownTriggered"))
def onMoveBottom(self):
self.emit(Qt.SIGNAL("moveBottomTriggered"))
class SelectionToolBar(BaseToolBar):
def __init__(self, view=None, parent=None, designMode=False):
BaseToolBar.__init__(self, name="Taurus selection toolbar", view=view,
parent=parent, designMode=designMode)
af = ActionFactory()
self._selectAllAction = af.createAction(self, "Select All",
icon=getThemeIcon("edit-select-all"),
tip="Select all items",
triggered=self.onSelectAll)
self._clearSelectionAction = af.createAction(self, "Clear selection",
icon=getThemeIcon("edit-clear"),
tip="Clears current selection",
triggered=self.onclearSelection)
self.addAction(self._selectAllAction)
self.addAction(self._clearSelectionAction)
def onSelectAll(self):
self.emit(Qt.SIGNAL("selectAllTriggered"))
def onclearSelection(self):
self.emit(Qt.SIGNAL("clearSelectionTriggered"))
class RefreshToolBar(BaseToolBar):
def __init__(self, view=None, parent=None, designMode=False):
BaseToolBar.__init__(self, name="Taurus refresh toolbar", view=view,
parent=parent, designMode=designMode)
af = ActionFactory()
self._refreshAction = af.createAction(self, "Refresh",
icon=getThemeIcon("view-refresh"),
tip="Refresh view",
triggered=self.onRefresh)
self.addAction(self._refreshAction)
def onRefresh(self):
self.emit(Qt.SIGNAL("refreshTriggered"))
class PerspectiveToolBar(BaseToolBar):
def __init__(self, perspective, view=None, parent=None, designMode=False):
BaseToolBar.__init__(self, name="Taurus refresh toolbar", view=view,
parent=parent, designMode=designMode)
self._perspective = perspective
view = self.viewWidget()
b = self._perspective_button = Qt.QToolButton(self)
b.setToolTip("Perspective selection")
b.setPopupMode(Qt.QToolButton.InstantPopup)
b.setToolButtonStyle(Qt.Qt.ToolButtonTextBesideIcon)
menu = Qt.QMenu("Perspective", b)
b.setMenu(menu)
af = ActionFactory()
for persp, persp_data in view.KnownPerspectives.items():
label = persp_data["label"]
icon = getIcon(persp_data["icon"])
tip = persp_data["tooltip"]
action = af.createAction(self, label, icon=icon, tip=tip,
triggered=self.onSwitchPerspective)
action.perspective = persp
menu.addAction(action)
if persp == perspective:
b.setDefaultAction(action)
self._perspectiveAction = self.addWidget(b)
def switchPerspectiveButton(self):
"""Returns the QToolButton that handles the switch perspective.
:return: (PyQt4.QtGui.QToolButton) the switch perspective tool button
"""
return self._perspective_button
def onSwitchPerspective(self):
action = self.sender()
self._perspective = action.perspective
self._perspective_button.setDefaultAction(action)
self.emit(Qt.SIGNAL("perspectiveChanged"), action.perspective)
def perspective(self):
return self._perspective
class QBaseModelWidget(Qt.QMainWindow):
"""A pure Qt widget designed to display a Qt view widget (QTreeView for
example), envolved by optional toolbar and statusbar.
The Qt model associated with the internal Qt view widget should be a
:class:`taurus.qt.qtcore.model.TaurusBaseModel`"""
KnownPerspectives = { }
DftPerspective = None
def __init__(self, parent=None, designMode=False, with_filter_widget=True,
with_selection_widget=True, with_refresh_widget=True,
perspective=None, proxy=None):
Qt.QMainWindow.__init__(self, parent)
self.setWindowFlags(Qt.Qt.Widget)
self._baseQModel = None
self._toolBars = []
if with_filter_widget:
if isinstance(with_filter_widget, (bool, int)):
self._with_filter_widget = FilterToolBar
else:
self._with_filter_widget = with_filter_widget
else:
self._with_filter_widget = None
if with_selection_widget:
if isinstance(with_selection_widget, (bool, int)):
self._with_selection_widget = SelectionToolBar
else:
self._with_selection_widget = with_selection_widget
else:
self._with_selection_widget = None
if with_refresh_widget:
if isinstance(with_refresh_widget, (bool, int)):
self._with_refresh_widget = RefreshToolBar
else:
self._with_refresh_widget = with_refresh_widget
else:
self._with_refresh_widget = None
self._proxyModel = proxy
toolBars = self.createToolArea()
self._viewWidget = self.createViewWidget()
statusbar = self.createStatusBar()
for toolBar in toolBars:
#toolBar.addSeparator()
self.addToolBar(toolBar)
self.setContentsMargins(0, 0, 0, 0)
self.setCentralWidget(self._viewWidget)
self.setStatusBar(statusbar)
if perspective is None:
perspective = self.DftPerspective
if len(self.KnownPerspectives) > 1:
p_bar = self._perspectiveBar = PerspectiveToolBar(perspective, view=self, parent=self)
self.connect(p_bar, Qt.SIGNAL("perspectiveChanged"), self.onSwitchPerspective)
self.addToolBar(p_bar)
else:
self._perspectiveBar = None
self._setPerspective(perspective)
def createViewWidget(self, klass=None):
raise NotImplementedError
def createStatusBar(self):
sb = Qt.QStatusBar()
sb.setSizeGripEnabled(False)
return sb
def createToolArea(self):
tb = [] # tb = self._toolArea = QToolArea(self)
if self._with_filter_widget:
f_bar = self._filterBar = self._with_filter_widget(view=self, parent=self)
Qt.QObject.connect(f_bar, Qt.SIGNAL("filterChanged"),
self.onFilterChanged)
tb.append(f_bar)
else:
self._filterBar = None
if self._with_selection_widget:
s_bar = self._selectionBar = self._with_selection_widget(view=self, parent=self)
Qt.QObject.connect(s_bar, Qt.SIGNAL("selectAllTriggered"),
self.onSelectAll)
Qt.QObject.connect(s_bar, Qt.SIGNAL("clearSelectionTriggered"),
self.onClearSelection)
tb.append(s_bar)
else:
self._selectionBar = None
if self._with_refresh_widget:
r_bar = self._refreshBar = self._with_refresh_widget(view=self, parent=self)
Qt.QObject.connect(r_bar, Qt.SIGNAL("refreshTriggered"),
self.onRefreshModel)
tb.append(r_bar)
else:
self._refreshBar = None
return tb
def getPerspectiveBar(self):
return self._perspectiveBar
def getFilterBar(self):
return self._filterBar
def getSelectionBar(self):
return self._selectionBar
def getRefreshBar(self):
return self._refreshBar
def onRefreshModel(self):
self.getQModel().refresh(True)
def onSelectAll(self):
view = self.viewWidget()
view.selectAll()
def onClearSelection(self):
view = self.viewWidget()
view.clearSelection()
def _onClicked (self, index):
'''Emits an "itemClicked" signal with with the clicked item and column
as arguments'''
item = self._mapToSource(index).internalPointer()
self.emit(Qt.SIGNAL('itemClicked'),item, index.column())
def _onDoubleClicked (self, index):
'''Emits an "itemDoubleClicked" signal with the clicked item and column
as arguments'''
item = self._mapToSource(index).internalPointer()
self.emit(Qt.SIGNAL('itemDoubleClicked'),item, index.column())
def viewWidget(self):
return self._viewWidget
def getQModel(self):
return self.viewWidget().model()
def getBaseQModel(self):
return self._baseQModel
def usesProxyQModel(self):
return isinstance(self.getQModel(), Qt.QAbstractProxyModel)
def _mapToSource(self, index):
if not self.usesProxyQModel():
return index
model = self.getQModel()
while isinstance(model, Qt.QAbstractProxyModel):
index = model.mapToSource(index)
model = model.sourceModel()
return index
def setQModel(self, qmodel):
self._baseQModel = qmodel
while isinstance(self._baseQModel, Qt.QAbstractProxyModel):
self._baseQModel = self._baseQModel.sourceModel()
view = self.viewWidget()
old_selection_model = view.selectionModel()
CC = 'currentChanged(const QModelIndex &,const QModelIndex &)'
SC = 'selectionChanged(QItemSelection &, QItemSelection &)'
if old_selection_model is not None:
Qt.QObject.disconnect(old_selection_model, Qt.SIGNAL(CC),
self.viewCurrentIndexChanged)
Qt.QObject.disconnect(old_selection_model, Qt.SIGNAL(SC),
self.viewSelectionChanged)
view.setModel(qmodel)
new_selection_model = view.selectionModel()
if new_selection_model is not None:
Qt.QObject.connect(new_selection_model, Qt.SIGNAL(CC),
self.viewCurrentIndexChanged)
Qt.QObject.connect(new_selection_model, Qt.SIGNAL(SC),
self.viewSelectionChanged)
view.setCurrentIndex(view.rootIndex())
self._updateToolBar()
def viewSelectionChanged(self, selected, deselected):
self.emit(Qt.SIGNAL("itemSelectionChanged"))
def viewCurrentIndexChanged(self, current, previous):
# if there is a proxy model we have to translate the selection
base_current = self._mapToSource(current)
base_previous = self._mapToSource(previous)
self._updateToolBar(current)
if base_current.isValid():
currentTaurusTreeItem = base_current.internalPointer()
else:
currentTaurusTreeItem = None
if base_previous.isValid():
previousTaurusTreeItem = base_previous.internalPointer()
else:
previousTaurusTreeItem = None
self.emit(Qt.SIGNAL("currentItemChanged"), currentTaurusTreeItem,
previousTaurusTreeItem)
def _updateToolBar(self, current=None, previous=None):
pass
def selectedItems(self):
"""Returns a list of all selected non-hidden items
:return: (list<TaurusTreeItem>)
"""
view = self.viewWidget()
return [self._mapToSource(index).internalPointer() for index in view.selectedIndexes()]
def onFilterChanged(self, filter):
if not self.usesProxyQModel():
return
proxy_model = self.getQModel()
if len(filter) > 0 and filter[0] != '^':
filter = '^' + filter
proxy_model.setFilterRegExp(filter)
#proxy_model.setFilterFixedString(filter)
#proxy_model.setFilterWildcard(filter)
#self.update()
def refresh(self):
self.getQModel().refresh()
#-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
# Perspective handling
#-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
def perspective(self):
return self._perspectiveBar.perspective()
def onSwitchPerspective(self, perspective):
old_qmodel = self.getQModel()
self._setPerspective(perspective)
#set the selectables as they where in the previous model
if hasattr(old_qmodel, "selectables"):
self.getQModel().setSelectables(old_qmodel.selectables())
#set the taurus model (if any) to the qmodel
if hasattr(self,'getModelObj'):
taurusModel = self.getModelObj()
if taurusModel is not None:
self.getQModel().setDataSource(taurusModel)
def _setPerspective(self, perspective):
qmodel_classes = self.KnownPerspectives[perspective]["model"]
qmodel_class, qmodel_proxy_classes = qmodel_classes[-1], qmodel_classes[-2::-1] #reversed
qmodel = qmodel_class(self)
qmodel_source = qmodel
if self._proxyModel is None: #applies the chain of proxies
for qmodel_proxy_class in qmodel_proxy_classes:
qproxy = qmodel_proxy_class(self)
qproxy.setSourceModel(qmodel_source)
qmodel_source = qproxy
else:
self._proxyModel.setSourceModel(qmodel_source)
qmodel_source = self._proxyModel
self.setQModel(qmodel_source)
#-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
# QMainWindow overwriting
#-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
def addToolBar(self, toolbar):
Qt.QMainWindow.addToolBar(self, toolbar)
self._toolBars.append(toolbar)
def insertToolBar(self, before, toolbar):
if isinstance(before, Qt.QToolBar):
index = self._toolBars.index(before)
else:
index = before
before = self._toolBars[before]
Qt.QMainWindow.insertToolBar(self, before, toolbar)
self._toolBars.insert(index, toolbar)
class TaurusBaseModelWidget(TaurusBaseWidget):
"""A class:`taurus.qt.qtgui.base.TaurusBaseWidget` that connects to a
taurus model. It must be used together with
class:`~taurus.qt.qtgui.base.QBaseModelWidget`"""
def __init__(self, designMode=False):#, perspective=None, proxy=None):
name = self.__class__.__name__
self.call__init__(TaurusBaseWidget, name, designMode=designMode)
#-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
# TaurusBaseWidget overwriting
#-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
def setModel(self, m):
TaurusBaseWidget.setModel(self, m)
view, modelObj = self.viewWidget(), self.getModelObj()
model = view.model()
if model is None:
return
model.setDataSource(modelObj)
#-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
# QT property definition
#-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
#: This property holds the unique URI string representing the model name
#: with which this widget will get its data from. The convention used for
#: the string can be found :ref:`here <model-concept>`.
#:
#: In case the property :attr:`useParentModel` is set to True, the model
#: text must start with a '/' followed by the attribute name.
#:
#: **Access functions:**
#:
#: * :meth:`TaurusBaseWidget.getModel`
#: * :meth:`TaurusBaseWidget.setModel`
#: * :meth:`TaurusBaseWidget.resetModel`
#:
#: .. seealso:: :ref:`model-concept`
model = Qt.pyqtProperty("QString", TaurusBaseWidget.getModel, setModel,
TaurusBaseWidget.resetModel)