Mercurial Repositories > eric / file comparison
comparison: Helpviewer/History/HistoryModel.py
Helpviewer/History/HistoryModel.py
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| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2009 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing the history model. | |
| 8 """ | |
| 9 | |
| 10 from PyQt4.QtCore import * | |
| 11 | |
| 12 import Helpviewer.HelpWindow | |
| 13 | |
| 14 class HistoryModel(QAbstractTableModel): | |
| 15 """ | |
| 16 Class implementing the history model. | |
| 17 """ | |
| 18 DateRole = Qt.UserRole + 1 | |
| 19 DateTimeRole = Qt.UserRole + 2 | |
| 20 UrlRole = Qt.UserRole + 3 | |
| 21 UrlStringRole = Qt.UserRole + 4 | |
| 22 TitleRole = Qt.UserRole + 5 | |
| 23 MaxRole = TitleRole | |
| 24 | |
| 25 def __init__(self, historyManager, parent = None): | |
| 26 """ | |
| 27 Constructor | |
| 28 | |
| 29 @param historyManager reference to the history manager object (HistoryManager) | |
| 30 @param parent reference to the parent object (QObject) | |
| 31 """ | |
| 32 QAbstractTableModel.__init__(self, parent) | |
| 33 | |
| 34 self.__historyManager = historyManager | |
| 35 | |
| 36 self.__headers = [ | |
| 37 self.trUtf8("Title"), | |
| 38 self.trUtf8("Address"), | |
| 39 ] | |
| 40 | |
| 41 self.connect(self.__historyManager, SIGNAL("historyReset()"), | |
| 42 self.historyReset) | |
| 43 self.connect(self.__historyManager, SIGNAL("entryRemoved"), | |
| 44 self.historyReset) | |
| 45 self.connect(self.__historyManager, SIGNAL("entryAdded"), | |
| 46 self.entryAdded) | |
| 47 self.connect(self.__historyManager, SIGNAL("entryUpdated(int)"), | |
| 48 self.entryUpdated) | |
| 49 | |
| 50 def historyReset(self): | |
| 51 """ | |
| 52 Public slot to reset the model. | |
| 53 """ | |
| 54 self.reset() | |
| 55 | |
| 56 def entryAdded(self): | |
| 57 """ | |
| 58 Public slot to handle the addition of a history entry. | |
| 59 """ | |
| 60 self.beginInsertRows(QModelIndex(), 0, 0) | |
| 61 self.endInsertRows() | |
| 62 | |
| 63 def entryUpdated(self, row): | |
| 64 """ | |
| 65 Public slot to handle the update of a history entry. | |
| 66 | |
| 67 @param row row number of the updated entry (integer) | |
| 68 """ | |
| 69 idx = self.index(row, 0) | |
| 70 self.emit(SIGNAL("dataChanged(const QModelIndex&, const QModelIndex&)"), | |
| 71 idx, idx) | |
| 72 | |
| 73 def headerData(self, section, orientation, role = Qt.DisplayRole): | |
| 74 """ | |
| 75 Public method to get the header data. | |
| 76 | |
| 77 @param section section number (integer) | |
| 78 @param orientation header orientation (Qt.Orientation) | |
| 79 @param role data role (integer) | |
| 80 @return header data (QVariant) | |
| 81 """ | |
| 82 if orientation == Qt.Horizontal and role == Qt.DisplayRole: | |
| 83 try: | |
| 84 return QVariant(self.__headers[section]) | |
| 85 except IndexError: | |
| 86 pass | |
| 87 return QAbstractTableModel.headerData(self, section, orientation, role) | |
| 88 | |
| 89 def data(self, index, role = Qt.DisplayRole): | |
| 90 """ | |
| 91 Public method to get data from the model. | |
| 92 | |
| 93 @param index index of history entry to get data for (QModelIndex) | |
| 94 @param role data role (integer) | |
| 95 @return history entry data (QVariant) | |
| 96 """ | |
| 97 lst = self.__historyManager.history() | |
| 98 if index.row() < 0 or index.row() > len(lst): | |
| 99 return QVariant() | |
| 100 | |
| 101 itm = lst[index.row()] | |
| 102 if role == self.DateTimeRole: | |
| 103 return QVariant(itm.dateTime) | |
| 104 elif role == self.DateRole: | |
| 105 return QVariant(itm.dateTime.date()) | |
| 106 elif role == self.UrlRole: | |
| 107 return QVariant(QUrl(itm.url)) | |
| 108 elif role == self.UrlStringRole: | |
| 109 return QVariant(itm.url) | |
| 110 elif role == self.TitleRole: | |
| 111 return QVariant(itm.userTitle()) | |
| 112 elif role in [Qt.DisplayRole, Qt.EditRole]: | |
| 113 if index.column() == 0: | |
| 114 return QVariant(itm.userTitle()) | |
| 115 elif index.column() == 1: | |
| 116 return QVariant(itm.url) | |
| 117 elif role == Qt.DecorationRole: | |
| 118 if index.column() == 0: | |
| 119 return QVariant(Helpviewer.HelpWindow.HelpWindow.icon(QUrl(itm.url))) | |
| 120 | |
| 121 return QVariant() | |
| 122 | |
| 123 def columnCount(self, parent = QModelIndex()): | |
| 124 """ | |
| 125 Public method to get the number of columns. | |
| 126 | |
| 127 @param parent index of parent (QModelIndex) | |
| 128 @return number of columns (integer) | |
| 129 """ | |
| 130 if parent.isValid(): | |
| 131 return 0 | |
| 132 else: | |
| 133 return len(self.__headers) | |
| 134 | |
| 135 def rowCount(self, parent = QModelIndex()): | |
| 136 """ | |
| 137 Public method to determine the number of rows. | |
| 138 | |
| 139 @param parent index of parent (QModelIndex) | |
| 140 @return number of rows (integer) | |
| 141 """ | |
| 142 if parent.isValid(): | |
| 143 return 0 | |
| 144 else: | |
| 145 return len(self.__historyManager.history()) | |
| 146 | |
| 147 def removeRows(self, row, count, parent = QModelIndex()): | |
| 148 """ | |
| 149 Public method to remove history entries from the model. | |
| 150 | |
| 151 @param row row of the first history entry to remove (integer) | |
| 152 @param count number of history entries to remove (integer) | |
| 153 @param index of the parent entry (QModelIndex) | |
| 154 @return flag indicating successful removal (boolean) | |
| 155 """ | |
| 156 if parent.isValid(): | |
| 157 return False | |
| 158 | |
| 159 lastRow = row + count - 1 | |
| 160 self.beginRemoveRows(parent, row, lastRow) | |
| 161 lst = self.__historyManager.history()[:] | |
| 162 for index in range(lastRow, row - 1, -1): | |
| 163 del lst[index] | |
| 164 self.disconnect(self.__historyManager, SIGNAL("historyReset()"), | |
| 165 self.historyReset) | |
| 166 self.__historyManager.setHistory(lst) | |
| 167 self.connect(self.__historyManager, SIGNAL("historyReset()"), | |
| 168 self.historyReset) | |
| 169 self.endRemoveRows() | |
| 170 return True |
