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db_tree.py
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db_tree.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
Name : DB Manager
Description : Database manager plugin for QuantumGIS
Date : May 23, 2011
copyright : (C) 2011 by Giuseppe Sucameli
email : brush.tyler@gmail.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
"""
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.core import QgsMapLayerRegistry
from .db_model import DBModel
from .db_plugins.plugin import DBPlugin, Schema, Table
class DBTree(QTreeView):
def __init__(self, mainWindow):
QTreeView.__init__(self, mainWindow)
self.mainWindow = mainWindow
self.setModel( DBModel(self) )
self.setHeaderHidden(True)
self.setEditTriggers(QTreeView.EditKeyPressed|QTreeView.SelectedClicked)
self.setDragEnabled(True)
self.setAcceptDrops(True)
self.setDropIndicatorShown(True)
self.connect(self.selectionModel(), SIGNAL("currentChanged(const QModelIndex&, const QModelIndex&)"), self.currentItemChanged)
self.connect(self, SIGNAL("expanded(const QModelIndex&)"), self.itemChanged)
self.connect(self, SIGNAL("collapsed(const QModelIndex&)"), self.itemChanged)
self.connect(self.model(), SIGNAL("dataChanged(const QModelIndex&, const QModelIndex&)"), self.modelDataChanged)
self.connect(self.model(), SIGNAL("notPopulated"), self.collapse)
def refreshItem(self, item=None):
if item == None:
item = self.currentItem()
if item == None: return
self.model().refreshItem(item)
def showSystemTables(self, show):
pass
def currentItem(self):
indexes = self.selectedIndexes()
if len(indexes) <= 0:
return
return self.model().getItem(indexes[0])
def currentDatabase(self):
item = self.currentItem()
if item == None: return
if isinstance(item, (DBPlugin, Schema, Table)):
return item.database()
return None
def currentSchema(self):
item = self.currentItem()
if item == None: return
if isinstance(item, (Schema, Table)):
return item.schema()
return None
def currentTable(self):
item = self.currentItem()
if item == None: return
if isinstance(item, Table):
return item
return None
def itemChanged(self, index):
self.setCurrentIndex(index)
self.emit( SIGNAL('selectedItemChanged'), self.currentItem() )
def modelDataChanged(self, indexFrom, indexTo):
self.itemChanged(indexTo)
def currentItemChanged(self, current, previous):
self.itemChanged(current)
def contextMenuEvent(self, ev):
index = self.indexAt( ev.pos() )
if not index.isValid():
return
if index != self.currentIndex():
self.itemChanged(index)
item = self.currentItem()
menu = QMenu(self)
if isinstance(item, (Table, Schema)):
menu.addAction("Rename", self.rename)
menu.addAction("Delete", self.delete)
if isinstance(item, Table):
menu.addSeparator()
menu.addAction("Add to QGis canvas", self.addLayer)
elif isinstance(item, DBPlugin) and item.database() is not None:
menu.addAction("Re-connect", self.reconnect)
if not menu.isEmpty():
menu.exec_(ev.globalPos())
menu.deleteLater()
def rename(self):
index = self.currentIndex()
item = self.model().getItem(index)
if isinstance(item, (Table, Schema)):
self.edit( index )
def delete(self):
item = self.currentItem()
if isinstance(item, (Table, Schema)):
self.mainWindow.invokeCallback(item.database().deleteActionSlot)
def addLayer(self):
table = self.currentTable()
if table is not None:
QgsMapLayerRegistry.instance().addMapLayer(table.toMapLayer())
def reconnect(self):
db = self.currentDatabase()
if db is not None:
self.mainWindow.invokeCallback(db.reconnectActionSlot)