Mercurial Repositories > eric / file comparison
comparison: SqlBrowser/SqlConnectionWidget.py
SqlBrowser/SqlConnectionWidget.py
- changeset 0
- de9c2efb9d02
- child 13
- 1af94a91f439
equal
deleted
inserted
replaced
| -1:000000000000 | 0:de9c2efb9d02 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2009 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a widget showing the SQL connections. | |
| 8 """ | |
| 9 | |
| 10 from PyQt4.QtCore import * | |
| 11 from PyQt4.QtGui import * | |
| 12 from PyQt4.QtSql import QSqlDatabase | |
| 13 | |
| 14 class SqlConnectionWidget(QWidget): | |
| 15 """ | |
| 16 Class implementing a widget showing the SQL connections. | |
| 17 | |
| 18 @signal tableActivated(QString) emitted after the entry for a table has been activated | |
| 19 @signal schemaRequested(QString) emitted when the schema display is requested | |
| 20 @signal cleared() emitted after the connection tree has been cleared | |
| 21 """ | |
| 22 def __init__(self, parent = None): | |
| 23 """ | |
| 24 Constructor | |
| 25 | |
| 26 @param parent reference to the parent widget (QWidget) | |
| 27 """ | |
| 28 QWidget.__init__(self, parent) | |
| 29 | |
| 30 layout = QVBoxLayout(self) | |
| 31 layout.setMargin(0) | |
| 32 | |
| 33 self.__connectionTree = QTreeWidget(self) | |
| 34 self.__connectionTree.setObjectName("connectionTree") | |
| 35 self.__connectionTree.setHeaderLabels([self.trUtf8("Database")]) | |
| 36 self.__connectionTree.header().setResizeMode(QHeaderView.Stretch) | |
| 37 refreshAction = QAction(self.trUtf8("Refresh"), self.__connectionTree) | |
| 38 self.__schemaAction = QAction(self.trUtf8("Show Schema"), self.__connectionTree) | |
| 39 | |
| 40 self.connect(refreshAction, SIGNAL("triggered()"), self.refresh) | |
| 41 self.connect(self.__schemaAction, SIGNAL("triggered()"), self.showSchema) | |
| 42 | |
| 43 self.__connectionTree.addAction(refreshAction) | |
| 44 self.__connectionTree.addAction(self.__schemaAction) | |
| 45 self.__connectionTree.setContextMenuPolicy(Qt.ActionsContextMenu) | |
| 46 | |
| 47 layout.addWidget(self.__connectionTree) | |
| 48 | |
| 49 self.connect(self.__connectionTree, | |
| 50 SIGNAL("itemActivated(QTreeWidgetItem*, int)"), | |
| 51 self.__itemActivated) | |
| 52 self.connect(self.__connectionTree, | |
| 53 SIGNAL("currentItemChanged(QTreeWidgetItem*, QTreeWidgetItem*)"), | |
| 54 self.__currentItemChanged) | |
| 55 | |
| 56 self.__activeDb = "" | |
| 57 | |
| 58 def refresh(self): | |
| 59 """ | |
| 60 Public slot to refresh the connection tree. | |
| 61 """ | |
| 62 self.__connectionTree.clear() | |
| 63 self.emit(SIGNAL("cleared()")) | |
| 64 | |
| 65 connectionNames = QSqlDatabase.connectionNames() | |
| 66 | |
| 67 foundActiveDb = False | |
| 68 for name in connectionNames: | |
| 69 root = QTreeWidgetItem(self.__connectionTree) | |
| 70 db = QSqlDatabase.database(name, False) | |
| 71 root.setText(0, self.__dbCaption(db)) | |
| 72 if name == self.__activeDb: | |
| 73 foundActiveDb = True | |
| 74 self.__setActive(root) | |
| 75 if db.isOpen(): | |
| 76 tables = db.tables() | |
| 77 for table in tables: | |
| 78 itm = QTreeWidgetItem(root) | |
| 79 itm.setText(0, table) | |
| 80 | |
| 81 if not foundActiveDb and connectionNames: | |
| 82 self.__activeDb = connectionNames[0] | |
| 83 self.__setActive(self.__connectionTree.topLevelItem(0)) | |
| 84 | |
| 85 self.__connectionTree.doItemsLayout() | |
| 86 | |
| 87 def showSchema(self): | |
| 88 """ | |
| 89 Public slot to show schema data of a database. | |
| 90 """ | |
| 91 cItm = self.__connectionTree.currentItem() | |
| 92 if cItm is None or cItm.parent() is None: | |
| 93 return | |
| 94 self.__setActive(cItm.parent()) | |
| 95 self.emit(SIGNAL("schemaRequested(QString)"), cItm.text(0)) | |
| 96 | |
| 97 def __itemActivated(self, itm, column): | |
| 98 """ | |
| 99 Private slot handling the activation of an item. | |
| 100 | |
| 101 @param itm reference to the item (QTreeWidgetItem) | |
| 102 @param column column that was activated (integer) | |
| 103 """ | |
| 104 if itm is None: | |
| 105 return | |
| 106 | |
| 107 if itm.parent() is None: | |
| 108 self.__setActive(itm) | |
| 109 else: | |
| 110 self.__setActive(itm.parent()) | |
| 111 self.emit(SIGNAL("tableActivated(QString)"), itm.text(0)) | |
| 112 | |
| 113 def __currentItemChanged(self, current, previous): | |
| 114 """ | |
| 115 Private slot handling a change of the current item. | |
| 116 | |
| 117 @param current reference to the new current item (QTreeWidgetItem) | |
| 118 @param previous reference to the previous current item (QTreeWidgetItem) | |
| 119 """ | |
| 120 self.__schemaAction.setEnabled( | |
| 121 current is not None and current.parent() is not None) | |
| 122 | |
| 123 def __dbCaption(self, db): | |
| 124 """ | |
| 125 Private method to assemble a string for the caption. | |
| 126 | |
| 127 @param db reference to the database object (QSqlDatabase) | |
| 128 @return caption string (string) | |
| 129 """ | |
| 130 nm = db.driverName() | |
| 131 nm += ":" | |
| 132 if db.userName(): | |
| 133 nm += db.userName() | |
| 134 nm += "@" | |
| 135 nm += db.databaseName() | |
| 136 return nm | |
| 137 | |
| 138 def __setBold(self, itm, bold): | |
| 139 """ | |
| 140 Private slot to set the font to bold. | |
| 141 | |
| 142 @param itm reference to the item to be changed (QTreeWidgetItem) | |
| 143 @param bold flag indicating bold (boolean) | |
| 144 """ | |
| 145 font = itm.font(0) | |
| 146 font.setBold(bold) | |
| 147 itm.setFont(0, font) | |
| 148 | |
| 149 def currentDatabase(self): | |
| 150 """ | |
| 151 Public method to get the current database. | |
| 152 | |
| 153 @return reference to the current database (QSqlDatabase) | |
| 154 """ | |
| 155 return QSqlDatabase.database(self.__activeDb) | |
| 156 | |
| 157 def __setActive(self, itm): | |
| 158 """ | |
| 159 Private slot to set an item to active. | |
| 160 | |
| 161 @param itm reference to the item to set as the active item (QTreeWidgetItem) | |
| 162 """ | |
| 163 for index in range(self.__connectionTree.topLevelItemCount()): | |
| 164 if self.__connectionTree.topLevelItem(index).font(0).bold(): | |
| 165 self.__setBold(self.__connectionTree.topLevelItem(index), False) | |
| 166 | |
| 167 if itm is None: | |
| 168 return | |
| 169 | |
| 170 self.__setBold(itm, True) | |
| 171 self.__activeDb = QSqlDatabase.connectionNames()[ | |
| 172 self.__connectionTree.indexOfTopLevelItem(itm)] |
