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# -*- coding: utf-8 -*-
"""
/***************************************************************************
Name : DB Manager
Description : Database manager plugin for QGIS
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 qgis.PyQt.QtCore import pyqtSignal
from qgis.PyQt.QtWidgets import QWidget, QTreeView, QMenu, QLabel
from qgis.core import QgsMapLayerRegistry, QgsMessageLog
from qgis.gui import QgsMessageBar, QgsMessageBarItem
from .db_model import DBModel, PluginItem
from .db_plugins.plugin import DBPlugin, Schema, Table
class DBTree(QTreeView):
selectedItemChanged = pyqtSignal(object)
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.doubleClicked.connect(self.addLayer)
self.selectionModel().currentChanged.connect(self.currentItemChanged)
self.expanded.connect(self.itemChanged)
self.collapsed.connect(self.itemChanged)
self.model().dataChanged.connect(self.modelDataChanged)
self.model().notPopulated.connect(self.collapse)
def refreshItem(self, item=None):
if item is None:
item = self.currentItem()
if item is 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 is None:
return
if isinstance(item, (DBPlugin, Schema, Table)):
return item.database()
return None
def currentSchema(self):
item = self.currentItem()
if item is None:
return
if isinstance(item, (Schema, Table)):
return item.schema()
return None
def currentTable(self):
item = self.currentItem()
if item is None:
return
if isinstance(item, Table):
return item
return None
def newConnection(self):
index = self.currentIndex()
if not index.isValid() or not isinstance(index.internalPointer(), PluginItem):
return
item = self.currentItem()
self.mainWindow.invokeCallback(item.addConnectionActionSlot, index)
def itemChanged(self, index):
self.setCurrentIndex(index)
self.selectedItemChanged.emit(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(self.tr("Rename"), self.rename)
menu.addAction(self.tr("Delete"), self.delete)
if isinstance(item, Table) and item.canBeAddedToCanvas():
menu.addSeparator()
menu.addAction(self.tr("Add to canvas"), self.addLayer)
elif isinstance(item, DBPlugin):
if item.database() is not None:
menu.addAction(self.tr("Re-connect"), self.reconnect)
menu.addAction(self.tr("Remove"), self.delete)
elif not index.parent().isValid() and item.typeName() in ("spatialite", "gpkg"):
menu.addAction(self.tr("New Connection..."), self.newConnection)
if not menu.isEmpty():
menu.exec_(ev.globalPos())
menu.deleteLater()
def rename(self):
item = self.currentItem()
if isinstance(item, (Table, Schema)):
self.edit(self.currentIndex())
def delete(self):
item = self.currentItem()
if isinstance(item, (Table, Schema)):
self.mainWindow.invokeCallback(item.database().deleteActionSlot)
elif isinstance(item, DBPlugin):
self.mainWindow.invokeCallback(item.removeActionSlot)
def addLayer(self):
table = self.currentTable()
if table is not None:
layer = table.toMapLayer()
layers = QgsMapLayerRegistry.instance().addMapLayers([layer])
if len(layers) != 1:
QgsMessageLog.logMessage(
self.tr("%1 is an invalid layer - not loaded").replace("%1", layer.publicSource()), "DBManagerPlugin")
msgLabel = QLabel(self.tr(
"%1 is an invalid layer and cannot be loaded. Please check the <a href=\"#messageLog\">message log</a> for further info.").replace(
"%1", layer.publicSource()), self.mainWindow.infoBar)
msgLabel.setWordWrap(True)
msgLabel.linkActivated.connect(self.mainWindow.iface.mainWindow().findChild(QWidget, "MessageLog").show)
msgLabel.linkActivated.connect(self.mainWindow.iface.mainWindow().raise_)
self.mainWindow.infoBar.pushItem(QgsMessageBarItem(msgLabel, QgsMessageBar.WARNING))
def reconnect(self):
db = self.currentDatabase()
if db is not None:
self.mainWindow.invokeCallback(db.reconnectActionSlot)
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