Source code for sas.qtgui.Perspectives.Fitting.ViewDelegate

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

import sas.qtgui.Utilities.GuiUtils as GuiUtils

[docs]class ModelViewDelegate(QtWidgets.QStyledItemDelegate): """ Custom delegate for appearance and behavior control of the model view """
[docs] def __init__(self, parent=None): """ Overwrite generic constructor to allow for some globals """ super(ModelViewDelegate, self).__init__() # Main parameter table view columns self.param_error=-1 self.param_property=0 self.param_value=1 self.param_min=2 self.param_max=3 self.param_unit=4
[docs] def fancyColumns(self): return [self.param_value, self.param_min, self.param_max, self.param_unit]
[docs] def addErrorColumn(self): """ Modify local column pointers Note: the reverse is never required! """ self.param_property=0 self.param_value=1 self.param_error=2 self.param_min=3 self.param_max=4 self.param_unit=5
[docs] def paint(self, painter, option, index): """ Overwrite generic painter for certain columns """ if index.column() in self.fancyColumns(): # Units - present in nice HTML options = QtWidgets.QStyleOptionViewItem(option) self.initStyleOption(options,index) style = QtWidgets.QApplication.style() if options.widget is None else options.widget.style() # Prepare document for inserting into cell doc = QtGui.QTextDocument() # Convert the unit description into HTML text_html = GuiUtils.convertUnitToHTML(str(options.text)) doc.setHtml(text_html) doc.setDocumentMargin(1) # delete the original content options.text = "" style.drawControl(QtWidgets.QStyle.CE_ItemViewItem, options, painter, options.widget); context = QtGui.QAbstractTextDocumentLayout.PaintContext() textRect = style.subElementRect(QtWidgets.QStyle.SE_ItemViewItemText, options) painter.save() rect = textRect.topLeft() x = rect.x() y = rect.y() x += 3 # magic value for rendering nice display in the table y += 2 # magic value for rendering nice display in the table rect.setX(x) rect.setY(y) painter.translate(rect) painter.setClipRect(textRect.translated(-rect)) # Draw the QTextDocument in the cell doc.documentLayout().draw(painter, context) painter.restore() else: # Just the default paint QtWidgets.QStyledItemDelegate.paint(self, painter, option, index)
[docs] def createEditor(self, widget, option, index): """ Overwrite generic editor for certain columns """ if not index.isValid(): return 0 if index.column() == self.param_value: #only in the value column editor = QtWidgets.QLineEdit(widget) validator = GuiUtils.DoubleValidator() editor.setValidator(validator) return editor if index.column() in [self.param_property, self.param_error, self.param_unit]: # Set some columns uneditable return None if index.column() in (self.param_min, self.param_max): # Check if the edit role is set if not (index.flags() & QtCore.Qt.ItemIsEditable): return None return super(ModelViewDelegate, self).createEditor(widget, option, index)
[docs] def setModelData(self, editor, model, index): """ Overwrite generic model update method for certain columns """ if index.column() in (self.param_min, self.param_max): try: value_float = float(editor.text()) except ValueError: # TODO: present the failure to the user # balloon popup? tooltip? cell background colour flash? return QtWidgets.QStyledItemDelegate.setModelData(self, editor, model, index)
[docs]class PolyViewDelegate(QtWidgets.QStyledItemDelegate): """ Custom delegate for appearance and behavior control of the polydispersity view """ POLYDISPERSE_FUNCTIONS = ['rectangle', 'array', 'lognormal', 'gaussian', 'schulz'] combo_updated = QtCore.pyqtSignal(str, int) filename_updated = QtCore.pyqtSignal(int)
[docs] def __init__(self, parent=None): """ Overwrite generic constructor to allow for some globals """ super(PolyViewDelegate, self).__init__() self.poly_parameter = 0 self.poly_pd = 1 self.poly_error = None self.poly_min = 2 self.poly_max = 3 self.poly_npts = 4 self.poly_nsigs = 5 self.poly_function = 6 self.poly_filename = 7
[docs] def editableParameters(self): return [self.poly_pd, self.poly_min, self.poly_max, self.poly_npts, self.poly_nsigs]
[docs] def columnDict(self): return {self.poly_pd: 'width', self.poly_min: 'min', self.poly_max: 'max', self.poly_npts: 'npts', self.poly_nsigs: 'nsigmas'}
[docs] def addErrorColumn(self): """ Modify local column pointers Note: the reverse is never required! """ self.poly_parameter = 0 self.poly_pd = 1 self.poly_error = 2 self.poly_min = 3 self.poly_max = 4 self.poly_npts = 5 self.poly_nsigs = 6 self.poly_function = 7 self.poly_filename = 8
[docs] def createEditor(self, widget, option, index): # Remember the current choice if not index.isValid(): return 0 elif index.column() == self.poly_filename: # Notify the widget that we want to change the filename self.filename_updated.emit(index.row()) return None elif index.column() in self.editableParameters(): self.editor = QtWidgets.QLineEdit(widget) validator = GuiUtils.DoubleValidator() self.editor.setValidator(validator) return self.editor else: QtWidgets.QStyledItemDelegate.createEditor(self, widget, option, index)
[docs] def paint(self, painter, option, index): """ Overwrite generic painter for certain columns """ if index.column() in (self.poly_pd, self.poly_min, self.poly_max): # Units - present in nice HTML options = QtWidgets.QStyleOptionViewItem(option) self.initStyleOption(options,index) style = QtWidgets.QApplication.style() if options.widget is None else options.widget.style() # Prepare document for inserting into cell doc = QtGui.QTextDocument() current_font = painter.font() doc.setDefaultFont(current_font) # Convert the unit description into HTML text_html = GuiUtils.convertUnitToHTML(str(options.text)) doc.setHtml(text_html) # delete the original content options.text = "" style.drawControl(QtWidgets.QStyle.CE_ItemViewItem, options, painter, options.widget); context = QtGui.QAbstractTextDocumentLayout.PaintContext() textRect = style.subElementRect(QtWidgets.QStyle.SE_ItemViewItemText, options) painter.save() rect = textRect.topLeft() y = rect.y() y += 5.0 # magic value for rendering nice display in the table rect.setY(y) painter.translate(rect) painter.setClipRect(textRect.translated(-rect)) # Draw the QTextDocument in the cell doc.documentLayout().draw(painter, context) painter.restore() else: # Just the default paint QtWidgets.QStyledItemDelegate.paint(self, painter, option, index)
[docs]class MagnetismViewDelegate(QtWidgets.QStyledItemDelegate): """ Custom delegate for appearance and behavior control of the magnetism view """
[docs] def __init__(self, parent=None): """ Overwrite generic constructor to allow for some globals """ super(MagnetismViewDelegate, self).__init__() self.mag_parameter = 0 self.mag_value = 1 self.mag_min = 2 self.mag_max = 3 self.mag_unit = 4
[docs] def editableParameters(self): return [self.mag_value, self.mag_min, self.mag_max]
[docs] def addErrorColumn(self): """ Modify local column pointers Note: the reverse is never required! """ self.mag_parameter = 0 self.mag_value = 1 self.mag_min = 3 self.mag_max = 4 self.mag_unit = 5
[docs] def createEditor(self, widget, option, index): # Remember the current choice current_text = index.data() if not index.isValid(): return 0 if index.column() in self.editableParameters(): editor = QtWidgets.QLineEdit(widget) validator = GuiUtils.DoubleValidator() editor.setValidator(validator) return editor else: QtWidgets.QStyledItemDelegate.createEditor(self, widget, option, index)
[docs] def paint(self, painter, option, index): """ Overwrite generic painter for certain columns """ if index.column() in (self.mag_value, self.mag_min, self.mag_max, self.mag_unit): # Units - present in nice HTML options = QtWidgets.QStyleOptionViewItem(option) self.initStyleOption(options,index) style = QtWidgets.QApplication.style() if options.widget is None else options.widget.style() # Prepare document for inserting into cell doc = QtGui.QTextDocument() current_font = painter.font() doc.setDefaultFont(current_font) # Convert the unit description into HTML text_html = GuiUtils.convertUnitToHTML(str(options.text)) doc.setHtml(text_html) # delete the original content options.text = "" style.drawControl(QtWidgets.QStyle.CE_ItemViewItem, options, painter, options.widget); context = QtGui.QAbstractTextDocumentLayout.PaintContext() textRect = style.subElementRect(QtWidgets.QStyle.SE_ItemViewItemText, options) painter.save() rect = textRect.topLeft() y = rect.y() y += 6.0 # magic value for rendering nice display in the table rect.setY(y) painter.translate(rect) painter.setClipRect(textRect.translated(-rect)) # Draw the QTextDocument in the cell doc.documentLayout().draw(painter, context) painter.restore() else: # Just the default paint QtWidgets.QStyledItemDelegate.paint(self, painter, option, index)