Mercurial Repositories > eric / file comparison
comparison: Helpviewer/OpenSearch/OpenSearchEngineModel.py
Helpviewer/OpenSearch/OpenSearchEngineModel.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 a model for search engines. | |
| 8 """ | |
| 9 | |
| 10 import re | |
| 11 | |
| 12 from PyQt4.QtCore import * | |
| 13 from PyQt4.QtGui import QPixmap, QIcon | |
| 14 | |
| 15 class OpenSearchEngineModel(QAbstractTableModel): | |
| 16 """ | |
| 17 Class implementing a model for search engines. | |
| 18 """ | |
| 19 def __init__(self, manager, parent = None): | |
| 20 """ | |
| 21 Constructor | |
| 22 | |
| 23 @param manager reference to the search engine manager (OpenSearchManager) | |
| 24 @param parent reference to the parent object (QObject) | |
| 25 """ | |
| 26 QAbstractTableModel.__init__(self, parent) | |
| 27 | |
| 28 self.__manager = manager | |
| 29 self.connect(manager, SIGNAL("changed()"), self.__enginesChanged) | |
| 30 | |
| 31 self.__headers = [ | |
| 32 self.trUtf8("Name"), | |
| 33 self.trUtf8("Keywords"), | |
| 34 ] | |
| 35 | |
| 36 def removeRows(self, row, count, parent = QModelIndex()): | |
| 37 """ | |
| 38 Public method to remove entries from the model. | |
| 39 | |
| 40 @param row start row (integer) | |
| 41 @param count number of rows to remove (integer) | |
| 42 @param parent parent index (QModelIndex) | |
| 43 @return flag indicating success (boolean) | |
| 44 """ | |
| 45 if parent.isValid(): | |
| 46 return False | |
| 47 | |
| 48 if count <= 0: | |
| 49 return False | |
| 50 | |
| 51 if self.rowCount() <= 1: | |
| 52 return False | |
| 53 | |
| 54 lastRow = row + count - 1 | |
| 55 | |
| 56 self.beginRemoveRows(parent, row, lastRow) | |
| 57 | |
| 58 nameList = self.__manager.allEnginesNames() | |
| 59 for index in range(row, lastRow + 1): | |
| 60 self.__manager.removeEngine(nameList[index]) | |
| 61 | |
| 62 # removeEngine emits changed() | |
| 63 #self.endRemoveRows() | |
| 64 | |
| 65 return True | |
| 66 | |
| 67 def rowCount(self, parent = QModelIndex()): | |
| 68 """ | |
| 69 Public method to get the number of rows of the model. | |
| 70 | |
| 71 @param parent parent index (QModelIndex) | |
| 72 @return number of rows (integer) | |
| 73 """ | |
| 74 if parent.isValid(): | |
| 75 return 0 | |
| 76 else: | |
| 77 return self.__manager.enginesCount() | |
| 78 | |
| 79 def columnCount(self, parent = QModelIndex()): | |
| 80 """ | |
| 81 Public method to get the number of columns of the model. | |
| 82 | |
| 83 @param parent parent index (QModelIndex) | |
| 84 @return number of columns (integer) | |
| 85 """ | |
| 86 return 2 | |
| 87 | |
| 88 def flags(self, index): | |
| 89 """ | |
| 90 Public method to get flags for a model cell. | |
| 91 | |
| 92 @param index index of the model cell (QModelIndex) | |
| 93 @return flags (Qt.ItemFlags) | |
| 94 """ | |
| 95 if index.column() == 1: | |
| 96 return Qt.ItemIsEnabled | Qt.ItemIsSelectable | Qt.ItemIsEditable | |
| 97 else: | |
| 98 return Qt.ItemIsEnabled | Qt.ItemIsSelectable | |
| 99 | |
| 100 def data(self, index, role): | |
| 101 """ | |
| 102 Public method to get data from the model. | |
| 103 | |
| 104 @param index index to get data for (QModelIndex) | |
| 105 @param role role of the data to retrieve (integer) | |
| 106 @return requested data (QVariant) | |
| 107 """ | |
| 108 if index.row() >= self.__manager.enginesCount() or index.row() < 0: | |
| 109 return QVariant() | |
| 110 | |
| 111 engine = self.__manager.engine(self.__manager.allEnginesNames()[index.row()]) | |
| 112 | |
| 113 if engine is None: | |
| 114 return QVariant() | |
| 115 | |
| 116 if index.column() == 0: | |
| 117 if role == Qt.DisplayRole: | |
| 118 return QVariant(engine.name()) | |
| 119 | |
| 120 elif role == Qt.DecorationRole: | |
| 121 image = engine.image() | |
| 122 if image.isNull(): | |
| 123 from Helpviewer.HelpWindow import HelpWindow | |
| 124 icon = HelpWindow.icon(QUrl(engine.imageUrl())) | |
| 125 else: | |
| 126 icon = QIcon(QPixmap.fromImage(image)) | |
| 127 return QVariant(icon) | |
| 128 | |
| 129 elif role == Qt.ToolTipRole: | |
| 130 description = self.trUtf8("<strong>Description:</strong> {0}")\ | |
| 131 .format(engine.description()) | |
| 132 if engine.providesSuggestions(): | |
| 133 description.append("<br/>") | |
| 134 description.append( | |
| 135 self.trUtf8("<strong>Provides contextual suggestions</strong>")) | |
| 136 | |
| 137 return QVariant(description) | |
| 138 elif index.column() == 1: | |
| 139 if role in [Qt.EditRole, Qt.DisplayRole]: | |
| 140 return QVariant( | |
| 141 ",".join(self.__manager.keywordsForEngine(engine))) | |
| 142 elif role == Qt.ToolTipRole: | |
| 143 return QVariant(self.trUtf8("Comma-separated list of keywords that may" | |
| 144 " be entered in the location bar followed by search terms to search" | |
| 145 " with this engine")) | |
| 146 | |
| 147 return QVariant() | |
| 148 | |
| 149 def setData(self, index, value, role = Qt.EditRole): | |
| 150 """ | |
| 151 Public method to set the data of a model cell. | |
| 152 | |
| 153 @param index index of the model cell (QModelIndex) | |
| 154 @param value value to be set (QVariant) | |
| 155 @param role role of the data (integer) | |
| 156 @return flag indicating success (boolean) | |
| 157 """ | |
| 158 if not index.isValid() or index.column() != 1: | |
| 159 return False | |
| 160 | |
| 161 if index.row() >= self.rowCount() or index.row() < 0: | |
| 162 return False | |
| 163 | |
| 164 if role != Qt.EditRole: | |
| 165 return False | |
| 166 | |
| 167 engineName = self.__manager.allEnginesNames()[index.row()] | |
| 168 keywords = re.split("[ ,]+", value.toString()) | |
| 169 self.__manager.setKeywordsForEngine(self.__manager.engine(engineName), keywords) | |
| 170 | |
| 171 return True | |
| 172 | |
| 173 def headerData(self, section, orientation, role = Qt.DisplayRole): | |
| 174 """ | |
| 175 Public method to get the header data. | |
| 176 | |
| 177 @param section section number (integer) | |
| 178 @param orientation header orientation (Qt.Orientation) | |
| 179 @param role data role (integer) | |
| 180 @return header data (QVariant) | |
| 181 """ | |
| 182 if orientation == Qt.Horizontal and role == Qt.DisplayRole: | |
| 183 try: | |
| 184 return QVariant(self.__headers[section]) | |
| 185 except IndexError: | |
| 186 pass | |
| 187 | |
| 188 return QVariant() | |
| 189 | |
| 190 def __enginesChanged(self): | |
| 191 """ | |
| 192 Private slot handling a change of the registered engines. | |
| 193 """ | |
| 194 QAbstractTableModel.reset(self) |
