Source code for sas.qtgui.MainWindow.CategoryManager

import json
import os

from PyQt5 import QtGui
from PyQt5 import QtCore
from PyQt5 import QtWidgets

from collections import defaultdict
from sas.qtgui.Utilities.CategoryInstaller import CategoryInstaller
from sasmodels.sasview_model import load_standard_models

from .UI.CategoryManagerUI import Ui_CategoryManagerUI
from .UI.ChangeCategoryUI import Ui_ChangeCategoryUI

[docs]class ToolTippedItemModel(QtGui.QStandardItemModel): """ Subclass from QStandardItemModel to allow displaying tooltips in QTableView model. """ def __init__(self, parent=None): QtGui.QStandardItemModel.__init__(self, parent)
[docs] def headerData(self, section, orientation, role=QtCore.Qt.DisplayRole): """ Displays tooltip for each column's header :param section: :param orientation: :param role: :return: """ if role == QtCore.Qt.ToolTipRole: if orientation == QtCore.Qt.Horizontal: return str(self.header_tooltips[section]) return QtGui.QStandardItemModel.headerData(self, section, orientation, role)
[docs]class Categories(object): """ Container class for accessing model categories """ def __init__(self): self.master_category_dict = defaultdict(list) self.by_model_dict = defaultdict(list) self.model_enabled_dict = defaultdict(bool) self.models = {} # Prepare the master category list self.readCategoryInfo() # Prepare model->category lookup self.setupModelDict()
[docs] def readCategoryInfo(self): """ Reads the categories in from file """ categorization_file = CategoryInstaller.get_user_file() if not os.path.isfile(categorization_file): categorization_file = CategoryInstaller.get_default_file() with open(categorization_file, 'rb') as cat_file: self.master_category_dict = json.load(cat_file) self.regenerateModelDict() self.category_list = sorted(self.master_category_dict.keys())
[docs] def saveCategories(self): """ Serializes categorization info to file """ self.regenerateMasterDict() with open(CategoryInstaller.get_user_file(), 'w') as cat_file: json.dump(self.master_category_dict, cat_file)
[docs] def setupModelDict(self): """ create a dictionary for model->category mapping """ # Load the model dict models = load_standard_models() for model in models: # {model name -> model object} self.models[model.name] = model
[docs] def regenerateModelDict(self): """ Regenerates self.by_model_dict which has each model name as the key and the list of categories belonging to that model along with the enabled mapping """ self.by_model_dict = defaultdict(list) for category in self.master_category_dict: for (model, enabled) in self.master_category_dict[category]: self.by_model_dict[model].append(category) self.model_enabled_dict[model] = enabled
[docs] def regenerateMasterDict(self): """ regenerates self.master_category_dict from self.by_model_dict and self.model_enabled_dict """ self.master_category_dict = defaultdict(list) for model in self.by_model_dict: for category in self.by_model_dict[model]: self.master_category_dict[category].append\ ((model, self.model_enabled_dict[model]))
[docs] def modelToCategory(self): """ Getter for the model->category dict """ return self.by_model_dict
[docs] def modelDict(self): """ Getter for the model list """ return self.models
[docs] def categoryDict(self): """ Getter for the category dict """ return self.master_category_dict
[docs] def categoryList(self): """ Getter for the category list """ return self.category_list
[docs]class CategoryManager(QtWidgets.QDialog, Ui_CategoryManagerUI): def __init__(self, parent=None, manager=None): super(CategoryManager, self).__init__(parent) self.setupUi(self) # disable the context help icon self.setWindowFlags(self.windowFlags() & ~QtCore.Qt.WindowContextHelpButtonHint) self.communicator = manager.communicator() self.setWindowTitle("Category Manager") self.initializeGlobals() self.initializeModels() self.initializeSignals()
[docs] def initializeGlobals(self): """ Initialize global variables used in this class """ # Default checked state self.chkEnable.setCheckState(QtCore.Qt.Checked) # Modify is disabled by default self.cmdModify.setEnabled(False) # Data for chosen model self.model_data = None # Categories object self.categories = Categories()
[docs] def initializeModels(self): """ Set up models and views """ # Set the main models self._category_model = ToolTippedItemModel() self.lstCategory.setModel(self._category_model) # Proxy model for showing a subset of model content self.model_proxy = QtCore.QSortFilterProxyModel(self) self.model_proxy.setSourceModel(self._category_model) self.lstCategory.setModel(self.model_proxy) self.initializeModelList() self.setTableProperties(self.lstCategory) self.lstCategory.setAlternatingRowColors(True)
# self.lstCategory.setContextMenuPolicy(QtCore.Qt.CustomContextMenu) # self.lstCategory.setAttribute(QtCore.Qt.WA_MacShowFocusRect, False)
[docs] def initializeModelList(self): """ Model category combo setup """ self._category_model.clear() for ind, model in enumerate(self.categories.modelDict()): item = QtGui.QStandardItem(model) empty_item = QtGui.QStandardItem() empty_item.setEditable(False) # Add a checkbox to it item.setCheckable(True) item.setCheckState(QtCore.Qt.Checked) item.setEditable(False) current_category = self.categories.modelToCategory()[model] self._category_model.appendRow([item, empty_item]) self._category_model.item(ind, 1).setText(', '.join(i for i in current_category))
[docs] def initializeSignals(self): """ :return: """ self.cmdOK.clicked.connect(self.onClose) self.cmdModify.clicked.connect(self.onModify) self.cmdReset.clicked.connect(self.onReset) self.chkEnable.toggled.connect(self.onEnableAll) # every change in txtSearch self.txtSearch.textChanged.connect(self.onSearch) # Signals from the list selectionModel = self.lstCategory.selectionModel() selectionModel.selectionChanged.connect(self.onListSelection)
[docs] def onClose(self): """ Save the category file before exiting """ self.categories.saveCategories() # Ask the fitting widget to reload the comboboxes self.communicator.updateModelCategoriesSignal.emit() self.close()
[docs] def selectedModels(self): """ Returns a list of selected models """ selected_models = [] selectionModel = self.lstCategory.selectionModel() selectedRows = selectionModel.selectedRows() for row in selectedRows: model_index = self.model_proxy.mapToSource(row) current_text = self._category_model.itemFromIndex(model_index).text() selected_models.append(self.categories.modelDict()[current_text]) return selected_models
[docs] def onListSelection(self): """ Respond to row selection and update GUI """ selected_items = self.selectedModels() self.cmdModify.setEnabled(len(selected_items) == 1)
[docs] def onReset(self): """ Reload the saved categories """ self.initializeGlobals() # Reload the Categories object self.categories = Categories() # Reload the model self.initializeModelList() self.setTableProperties(self.lstCategory) self.lstCategory.setAlternatingRowColors(True)
[docs] def onEnableAll(self, isChecked): """ Respond to the Enable/Disable All checkbox """ select = QtCore.Qt.Checked if isChecked else QtCore.Qt.Unchecked for row in range(self._category_model.rowCount()): self._category_model.item(row).setCheckState(select)
[docs] def onSearch(self): """ Respond to text entered in search field """ if self.txtSearch.isModified(): input_to_check = str(self.txtSearch.text()) # redefine the proxy model self.model_proxy.setFilterRegExp(QtCore.QRegExp(input_to_check, QtCore.Qt.CaseInsensitive, QtCore.QRegExp.FixedString))
[docs] def onModify(self): """ Show the Change Category dialog - modal """ # Selected category: selected_models = self.selectedModels() if len(selected_models) > 1: # Somehow we got more than one model - complain! raise AttributeError("Please select only one model.") change_dialog = ChangeCategory(parent=self, categories=self.categories, model=selected_models[0]) if change_dialog.exec_() != QtWidgets.QDialog.Accepted: return # Reload the model self.initializeModelList() self.setTableProperties(self.lstCategory) self.lstCategory.setAlternatingRowColors(True)
[docs] def setTableProperties(self, table): """ Setting table properties """ # Table properties table.verticalHeader().setVisible(False) table.setAlternatingRowColors(True) #table.setSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Expanding) table.setSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding) table.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows) table.resizeColumnsToContents() # Header header = table.horizontalHeader() header.setSectionResizeMode(QtWidgets.QHeaderView.ResizeToContents) header.ResizeMode(QtWidgets.QHeaderView.Interactive) self._category_model.setHeaderData(0, QtCore.Qt.Horizontal, "Model") self._category_model.setHeaderData(1, QtCore.Qt.Horizontal, "Category") self._category_model.header_tooltips = ['Select model', 'Change or create new category']
[docs]class ChangeCategory(QtWidgets.QDialog, Ui_ChangeCategoryUI): """ Dialog for adding/removing categories for a single model """ def __init__(self, parent=None, categories=None, model=None): super(ChangeCategory, self).__init__(parent) self.setupUi(self) # disable the context help icon self.setWindowFlags(self.windowFlags() & ~QtCore.Qt.WindowContextHelpButtonHint) self.model = model self.parent = parent self.categories = categories self.initializeElements() self.initializeList() self.initializeSignals()
[docs] def initializeElements(self): """ Initialize local GUI elements with information from the Categories object """ self.cbCategories.addItems(self.categories.categoryList()) self.setWindowTitle("Change Category for: "+ self.model.name) self.lblTitle.setText("Current categories for " + self.model.name) self.rbExisting.setChecked(True) self.onAddChoice()
[docs] def initializeList(self): """ Initialize the category list for the given model """ current_categories = self.categories.modelToCategory()[self.model.name] for cat in current_categories: self.lstCategories.addItem(cat)
[docs] def initializeSignals(self): """ Initialize signals for UI elements """ self.cmdAdd.clicked.connect(self.onAdd) self.cmdRemove.clicked.connect(self.onRemove) self.cmdOK.clicked.connect(self.onOK) self.cmdCancel.clicked.connect(self.close) # Signals from the list self.lstCategories.itemSelectionChanged.connect(self.onListSelection) # Signals from the radio buttons self.rbExisting.toggled.connect(self.onAddChoice)
[docs] def onAddChoice(self): """ Respond to the type selection for new category """ isNew = self.rbNew.isChecked() self.cbCategories.setEnabled(not isNew) self.txtNewCategory.setEnabled(isNew)
[docs] def onListSelection(self): """ Respond to selection in the category list view """ selected_items = self.selectedModels() self.cmdRemove.setEnabled(len(selected_items) > 0)
[docs] def selectedModels(self): """ Returns a list of selected models """ selected_categories = [] selectedRows = self.lstCategories.selectedItems() selected_categories = [str(row.text()) for row in selectedRows] return selected_categories
[docs] def onAdd(self): """ Add the chosen category to the list """ if self.rbExisting.isChecked(): new_category = self.cbCategories.currentText() else: new_category = self.txtNewCategory.text() # Display the current value as txt if new_category: self.lstCategories.addItem(new_category)
[docs] def onRemove(self): """ Remove selected categories in the list """ selectedRows = self.lstCategories.selectedItems() if not selectedRows: return for row in selectedRows: self.lstCategories.takeItem(self.lstCategories.row(row))
[docs] def onOK(self): """ Accept the new categories for the model """ # Read in the categories self.categories.modelToCategory()[self.model.name] = self.listCategories() self.accept()
[docs] def listCategories(self): """ Returns the list of categories from the QListWidget """ return [str(self.lstCategories.item(i).text()) for i in range(self.lstCategories.count())]