+++ /dev/null
-#!/usr/bin/env python
-
-"""
-http://www.grigoriev.ru/svgmath/ (MathML->SVG in Python)
-http://helm.cs.unibo.it/mml-widget/ (MathML widget in C++)
-"""
-
-from __future__ import with_statement
-
-import logging
-
-import util.qt_compat as qt_compat
-QtCore = qt_compat.QtCore
-QtGui = qt_compat.import_module("QtGui")
-
-from util import qui_utils
-import util.misc as misc_utils
-import history
-import operation
-
-
-_moduleLogger = logging.getLogger(__name__)
-
-
-class QCalcHistory(history.AbstractHistory):
-
- _CLOSE_COLUMN = 0
- _EQ_COLUMN = 1
- _RESULT_COLUMN = 2
-
- def __init__(self, errorReporter):
- super(QCalcHistory, self).__init__()
- self._prettyRenderer = operation.render_number()
- self._errorLog = errorReporter
-
- self._historyStore = QtGui.QStandardItemModel()
- self._historyStore.setHorizontalHeaderLabels(["", "Equation", "Result"])
- self._historyStore.itemChanged.connect(self._on_item_changed)
-
- self._historyView = QtGui.QTreeView()
- self._historyView.setModel(self._historyStore)
- self._historyView.setUniformRowHeights(True)
- self._historyView.setRootIsDecorated(False)
- self._historyView.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
- self._historyView.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
- self._historyView.setSelectionMode(QtGui.QAbstractItemView.SingleSelection)
- self._historyView.setHeaderHidden(True)
- self._historyView.activated.connect(self._on_row_activated)
-
- viewHeader = self._historyView.header()
- viewHeader.setSortIndicatorShown(True)
- viewHeader.setClickable(True)
-
- viewHeader.setResizeMode(self._CLOSE_COLUMN, QtGui.QHeaderView.ResizeToContents)
- viewHeader.setResizeMode(self._EQ_COLUMN, QtGui.QHeaderView.Stretch)
- viewHeader.setResizeMode(self._RESULT_COLUMN, QtGui.QHeaderView.ResizeToContents)
- viewHeader.setStretchLastSection(False)
-
- self._rowCount = 0
- self._programmaticUpdate = False
- self._closeIcon = qui_utils.get_theme_icon(("window-close", "general_close", "gtk-close"))
-
- @property
- def toplevel(self):
- return self._historyView
-
- def push(self, node):
- simpleNode = node.simplify()
-
- closeIcon = self._closeIcon
- icon = QtGui.QStandardItem(closeIcon, "")
- icon.setEditable(False)
- icon.setCheckable(False)
- equation = QtGui.QStandardItem(operation.render_operation(self._prettyRenderer, node))
- equation.setData(node)
- equation.setCheckable(False)
- eqFont = equation.font()
- eqFont.setPointSize(max(eqFont.pointSize() - 3, 5))
- equation.setFont(eqFont)
-
- result = QtGui.QStandardItem(operation.render_operation(self._prettyRenderer, simpleNode))
- result.setData(simpleNode)
- result.setEditable(False)
- result.setCheckable(False)
-
- row = (icon, equation, result)
- self._historyStore.appendRow(row)
-
- index = result.index()
- self._historyView.scrollToBottom()
- self._rowCount += 1
-
- def pop(self):
- if len(self) == 0:
- raise IndexError("Not enough items in the history for the operation")
-
- icon, equation, result = self._historyStore.takeRow(self._rowCount - 1)
- self._rowCount -= 1
- return equation.data()
-
- def peek(self):
- if len(self) == 0:
- raise IndexError("Not enough items in the history for the operation")
-
- icon, equation, result = self._historyStore.takeRow(self._rowCount - 1)
- row = (icon, equation, result)
- self._historyStore.appendRow(row)
-
- return equation.data()
-
- def clear(self):
- self._historyStore.clear()
- self._rowCount = 0
-
- def scroll_to_bottom(self):
- self._historyView.scrollToBottom()
-
- @misc_utils.log_exception(_moduleLogger)
- def _on_row_activated(self, index):
- with qui_utils.notify_error(self._errorLog):
- if index.column() == self._CLOSE_COLUMN:
- self._historyStore.removeRow(index.row(), index.parent())
- self._rowCount -= 1
- elif index.column() == self._EQ_COLUMN:
- self._duplicate_row(index)
- elif index.column() == self._RESULT_COLUMN:
- self._duplicate_row(index)
- else:
- raise NotImplementedError("Unsupported column to activate %s" % index.column())
-
- @misc_utils.log_exception(_moduleLogger)
- def _on_item_changed(self, item):
- with qui_utils.notify_error(self._errorLog):
- if self._programmaticUpdate:
- _moduleLogger.info("Blocking updating %r recursively" % item)
- return
- self._programmaticUpdate = True
- try:
- if item.column() in [self._EQ_COLUMN, self._RESULT_COLUMN]:
- self._update_input(item)
- else:
- raise NotImplementedError("Unsupported column to edit %s" % item.column())
- except StandardError, e:
- self._errorReporter.push_exception()
- finally:
- self._programmaticUpdate = False
-
- def _duplicate_row(self, index):
- item = self._historyStore.item(index.row(), self._EQ_COLUMN)
- self.push(item.data())
-
- def _parse_value(self, value):
- raise NotImplementedError("What?")
-
- def _update_input(self, item):
- node = item.data()
- try:
- eqNode = self._parse_value(str(item.text()))
- newText = operation.render_operation(self._prettyRenderer, eqNode)
-
- eqItem = self._historyStore.item(item.row(), self._EQ_COLUMN)
- eqItem.setData(eqNode)
- eqItem.setText(newText)
-
- resultNode = eqNode.simplify()
- resultText = operation.render_operation(self._prettyRenderer, resultNode)
- resultItem = self._historyStore.item(item.row(), self._RESULT_COLUMN)
- resultItem.setData(resultNode)
- resultItem.setText(resultText)
- except:
- oldText = operation.render_operation(self._prettyRenderer, node)
- item.setText(oldText)
- raise
-
- def __len__(self):
- return self._rowCount
-
- def __iter__(self):
- for i in xrange(self._rowCount):
- item = self._historyStore.item(i, self._EQ_COLUMN)
- if item is None:
- continue
- yield item.data()
projects / ejpi / blobdiff