SqlBrowser/SqlConnectionWidget.py

Sat, 02 Jan 2010 18:52:53 +0000

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sat, 02 Jan 2010 18:52:53 +0000
changeset 18
3b1f5d872fd7
parent 13
1af94a91f439
child 453
a81097a85889
child 792
a13346916170
permissions
-rw-r--r--

More renaming to eric5.

0
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1 # -*- coding: utf-8 -*-
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2
13
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3 # Copyright (c) 2009 - 2010 Detlev Offenbach <detlev@die-offenbachs.de>
0
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4 #
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5
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6 """
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7 Module implementing a widget showing the SQL connections.
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8 """
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9
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10 from PyQt4.QtCore import *
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11 from PyQt4.QtGui import *
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12 from PyQt4.QtSql import QSqlDatabase
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13
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14 class SqlConnectionWidget(QWidget):
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15 """
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16 Class implementing a widget showing the SQL connections.
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17
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18 @signal tableActivated(QString) emitted after the entry for a table has been activated
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19 @signal schemaRequested(QString) emitted when the schema display is requested
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20 @signal cleared() emitted after the connection tree has been cleared
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21 """
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22 def __init__(self, parent = None):
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23 """
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24 Constructor
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25
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26 @param parent reference to the parent widget (QWidget)
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27 """
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28 QWidget.__init__(self, parent)
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29
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30 layout = QVBoxLayout(self)
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31 layout.setMargin(0)
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32
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33 self.__connectionTree = QTreeWidget(self)
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34 self.__connectionTree.setObjectName("connectionTree")
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35 self.__connectionTree.setHeaderLabels([self.trUtf8("Database")])
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36 self.__connectionTree.header().setResizeMode(QHeaderView.Stretch)
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37 refreshAction = QAction(self.trUtf8("Refresh"), self.__connectionTree)
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38 self.__schemaAction = QAction(self.trUtf8("Show Schema"), self.__connectionTree)
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39
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40 self.connect(refreshAction, SIGNAL("triggered()"), self.refresh)
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41 self.connect(self.__schemaAction, SIGNAL("triggered()"), self.showSchema)
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42
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43 self.__connectionTree.addAction(refreshAction)
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44 self.__connectionTree.addAction(self.__schemaAction)
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45 self.__connectionTree.setContextMenuPolicy(Qt.ActionsContextMenu)
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46
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47 layout.addWidget(self.__connectionTree)
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48
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49 self.connect(self.__connectionTree,
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50 SIGNAL("itemActivated(QTreeWidgetItem*, int)"),
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51 self.__itemActivated)
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52 self.connect(self.__connectionTree,
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53 SIGNAL("currentItemChanged(QTreeWidgetItem*, QTreeWidgetItem*)"),
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54 self.__currentItemChanged)
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55
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56 self.__activeDb = ""
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57
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58 def refresh(self):
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59 """
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60 Public slot to refresh the connection tree.
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61 """
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62 self.__connectionTree.clear()
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63 self.emit(SIGNAL("cleared()"))
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64
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65 connectionNames = QSqlDatabase.connectionNames()
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66
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67 foundActiveDb = False
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68 for name in connectionNames:
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69 root = QTreeWidgetItem(self.__connectionTree)
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70 db = QSqlDatabase.database(name, False)
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71 root.setText(0, self.__dbCaption(db))
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72 if name == self.__activeDb:
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73 foundActiveDb = True
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74 self.__setActive(root)
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75 if db.isOpen():
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76 tables = db.tables()
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77 for table in tables:
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78 itm = QTreeWidgetItem(root)
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79 itm.setText(0, table)
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80
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81 if not foundActiveDb and connectionNames:
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82 self.__activeDb = connectionNames[0]
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83 self.__setActive(self.__connectionTree.topLevelItem(0))
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84
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85 self.__connectionTree.doItemsLayout()
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86
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87 def showSchema(self):
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88 """
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89 Public slot to show schema data of a database.
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90 """
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91 cItm = self.__connectionTree.currentItem()
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92 if cItm is None or cItm.parent() is None:
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93 return
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94 self.__setActive(cItm.parent())
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95 self.emit(SIGNAL("schemaRequested(QString)"), cItm.text(0))
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96
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97 def __itemActivated(self, itm, column):
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98 """
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99 Private slot handling the activation of an item.
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100
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101 @param itm reference to the item (QTreeWidgetItem)
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102 @param column column that was activated (integer)
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103 """
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104 if itm is None:
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105 return
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106
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107 if itm.parent() is None:
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108 self.__setActive(itm)
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109 else:
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110 self.__setActive(itm.parent())
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111 self.emit(SIGNAL("tableActivated(QString)"), itm.text(0))
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112
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113 def __currentItemChanged(self, current, previous):
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114 """
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115 Private slot handling a change of the current item.
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116
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117 @param current reference to the new current item (QTreeWidgetItem)
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118 @param previous reference to the previous current item (QTreeWidgetItem)
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119 """
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120 self.__schemaAction.setEnabled(
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121 current is not None and current.parent() is not None)
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122
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123 def __dbCaption(self, db):
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124 """
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125 Private method to assemble a string for the caption.
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126
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127 @param db reference to the database object (QSqlDatabase)
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128 @return caption string (string)
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129 """
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130 nm = db.driverName()
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131 nm += ":"
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132 if db.userName():
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133 nm += db.userName()
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parents:
diff changeset
134 nm += "@"
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135 nm += db.databaseName()
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parents:
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136 return nm
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137
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138 def __setBold(self, itm, bold):
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139 """
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140 Private slot to set the font to bold.
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141
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142 @param itm reference to the item to be changed (QTreeWidgetItem)
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143 @param bold flag indicating bold (boolean)
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144 """
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145 font = itm.font(0)
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146 font.setBold(bold)
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147 itm.setFont(0, font)
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148
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149 def currentDatabase(self):
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150 """
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151 Public method to get the current database.
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152
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153 @return reference to the current database (QSqlDatabase)
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154 """
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155 return QSqlDatabase.database(self.__activeDb)
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156
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157 def __setActive(self, itm):
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Detlev Offenbach <detlev@die-offenbachs.de>
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158 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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159 Private slot to set an item to active.
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parents:
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160
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161 @param itm reference to the item to set as the active item (QTreeWidgetItem)
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parents:
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162 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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163 for index in range(self.__connectionTree.topLevelItemCount()):
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parents:
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164 if self.__connectionTree.topLevelItem(index).font(0).bold():
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parents:
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165 self.__setBold(self.__connectionTree.topLevelItem(index), False)
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166
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167 if itm is None:
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168 return
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parents:
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169
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170 self.__setBold(itm, True)
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parents:
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171 self.__activeDb = QSqlDatabase.connectionNames()[
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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172 self.__connectionTree.indexOfTopLevelItem(itm)]

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