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QGIS/python/plugins/db_manager/db_manager.py
Nyall Dawson b369f1e1b0 Port dbmanager away from compiled resources 
These are not recommended, and removed in PyQt6
2024-02-28 11:23:47 +10:00

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"""
/***************************************************************************
Name : DB Manager
Description : Database manager plugin for QGIS
Date : May 23, 2011
copyright : (C) 2011 by Giuseppe Sucameli
email : brush.tyler@gmail.com
The content of this file is based on
- PG_Manager by Martin Dobias (GPLv2 license)
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
"""
import functools
from qgis.PyQt.QtCore import Qt, QByteArray, QSize
from qgis.PyQt.QtWidgets import QAction, QMainWindow, QApplication, QMenu, QTabWidget, QGridLayout, QSpacerItem, QSizePolicy, QDockWidget, QStatusBar, QMenuBar, QToolBar, QTabBar
from qgis.PyQt.QtGui import QIcon, QKeySequence
from qgis.gui import QgsMessageBar
from qgis.core import (
Qgis,
QgsApplication,
QgsSettings,
QgsMapLayerType
)
from qgis.utils import OverrideCursor
from .info_viewer import InfoViewer
from .table_viewer import TableViewer
from .layer_preview import LayerPreview
from .db_tree import DBTree
from .db_plugins.plugin import BaseError
from .dlg_db_error import DlgDbError
from .gui_utils import GuiUtils
class DBManager(QMainWindow):
def __init__(self, iface, parent=None):
QMainWindow.__init__(self, parent)
self.setAttribute(Qt.WidgetAttribute.WA_DeleteOnClose)
self.setupUi()
self.iface = iface
# restore the window state
settings = QgsSettings()
self.restoreGeometry(settings.value("/DB_Manager/mainWindow/geometry", QByteArray(), type=QByteArray))
self.restoreState(settings.value("/DB_Manager/mainWindow/windowState", QByteArray(), type=QByteArray))
self.toolBar.setIconSize(self.iface.iconSize())
self.toolBarOrientation()
self.toolBar.orientationChanged.connect(self.toolBarOrientation)
self.tabs.currentChanged.connect(self.tabChanged)
self.tree.selectedItemChanged.connect(self.itemChanged)
self.tree.model().dataChanged.connect(self.iface.reloadConnections)
self.itemChanged(None)
def closeEvent(self, e):
self.unregisterAllActions()
# clear preview, this will delete the layer in preview tab
self.preview.loadPreview(None)
# save the window state
settings = QgsSettings()
settings.setValue("/DB_Manager/mainWindow/windowState", self.saveState())
settings.setValue("/DB_Manager/mainWindow/geometry", self.saveGeometry())
QMainWindow.closeEvent(self, e)
def refreshItem(self, item=None):
with OverrideCursor(Qt.CursorShape.WaitCursor):
try:
if item is None:
item = self.tree.currentItem()
self.tree.refreshItem(item) # refresh item children in the db tree
except BaseError as e:
DlgDbError.showError(e, self)
def itemChanged(self, item):
with OverrideCursor(Qt.CursorShape.WaitCursor):
try:
self.reloadButtons()
# Force-reload information on the layer
self.info.setDirty()
# clear preview, this will delete the layer in preview tab
self.preview.loadPreview(None)
self.refreshTabs()
except BaseError as e:
DlgDbError.showError(e, self)
def reloadButtons(self):
db = self.tree.currentDatabase()
if not hasattr(self, '_lastDb'):
self._lastDb = db
elif db == self._lastDb:
return
# remove old actions
if self._lastDb is not None:
self.unregisterAllActions()
# add actions of the selected database
self._lastDb = db
if self._lastDb is not None:
self._lastDb.registerAllActions(self)
def tabChanged(self, index):
with OverrideCursor(Qt.CursorShape.WaitCursor):
try:
self.refreshTabs()
except BaseError as e:
DlgDbError.showError(e, self)
def refreshTabs(self):
index = self.tabs.currentIndex()
item = self.tree.currentItem()
table = self.tree.currentTable()
# enable/disable tabs
self.tabs.setTabEnabled(self.tabs.indexOf(self.table), table is not None)
self.tabs.setTabEnabled(self.tabs.indexOf(self.preview), table is not None and table.type in [table.VectorType,
table.RasterType] and table.geomColumn is not None)
# show the info tab if the current tab is disabled
if not self.tabs.isTabEnabled(index):
self.tabs.setCurrentWidget(self.info)
current_tab = self.tabs.currentWidget()
if current_tab == self.info:
self.info.showInfo(item)
elif current_tab == self.table:
self.table.loadData(item)
elif current_tab == self.preview:
self.preview.loadPreview(item)
def refreshActionSlot(self):
self.info.setDirty()
self.table.setDirty()
self.preview.setDirty()
self.refreshItem()
def importActionSlot(self):
db = self.tree.currentDatabase()
if db is None:
self.infoBar.pushMessage(self.tr("No database selected or you are not connected to it."),
Qgis.MessageLevel.Info, self.iface.messageTimeout())
return
outUri = db.uri()
schema = self.tree.currentSchema()
if schema:
outUri.setDataSource(schema.name, "", "", "")
from .dlg_import_vector import DlgImportVector
dlg = DlgImportVector(None, db, outUri, self)
dlg.exec()
def exportActionSlot(self):
table = self.tree.currentTable()
if table is None:
self.infoBar.pushMessage(self.tr("Select the table you want export to file."), Qgis.MessageLevel.Info,
self.iface.messageTimeout())
return
inLayer = table.toMapLayer()
if inLayer.type() != QgsMapLayerType.VectorLayer:
self.infoBar.pushMessage(
self.tr("Select a vector or a tabular layer you want export."),
Qgis.MessageLevel.Warning, self.iface.messageTimeout())
return
from .dlg_export_vector import DlgExportVector
dlg = DlgExportVector(inLayer, table.database(), self)
dlg.exec()
inLayer.deleteLater()
def runSqlWindow(self):
db = self.tree.currentDatabase()
if db is None:
self.infoBar.pushMessage(self.tr("No database selected or you are not connected to it."),
Qgis.MessageLevel.Info, self.iface.messageTimeout())
# force displaying of the message, it appears on the first tab (i.e. Info)
self.tabs.setCurrentIndex(0)
return
from .dlg_sql_window import DlgSqlWindow
query = DlgSqlWindow(self.iface, db, self)
dbname = db.connection().connectionName()
tabname = self.tr("Query ({0})").format(dbname)
index = self.tabs.addTab(query, tabname)
self.tabs.setTabIcon(index, db.connection().icon())
self.tabs.setCurrentIndex(index)
query.nameChanged.connect(functools.partial(self.update_query_tab_name, index, dbname))
def runSqlLayerWindow(self, layer):
from .dlg_sql_layer_window import DlgSqlLayerWindow
query = DlgSqlLayerWindow(self.iface, layer, self)
lname = layer.name()
tabname = self.tr("Layer ({0})").format(lname)
index = self.tabs.addTab(query, tabname)
# self.tabs.setTabIcon(index, db.connection().icon())
self.tabs.setCurrentIndex(index)
def update_query_tab_name(self, index, dbname, queryname):
if not queryname:
queryname = self.tr("Query")
tabname = "%s (%s)" % (queryname, dbname)
self.tabs.setTabText(index, tabname)
def showSystemTables(self):
self.tree.showSystemTables(self.actionShowSystemTables.isChecked())
def registerAction(self, action, menuName, callback=None):
""" register an action to the manager's main menu """
if not hasattr(self, '_registeredDbActions'):
self._registeredDbActions = {}
if callback is not None:
def invoke_callback(x):
return self.invokeCallback(callback)
if menuName is None or menuName == "":
self.addAction(action)
if menuName not in self._registeredDbActions:
self._registeredDbActions[menuName] = list()
self._registeredDbActions[menuName].append(action)
if callback is not None:
action.triggered.connect(invoke_callback)
return True
# search for the menu
actionMenu = None
helpMenuAction = None
for a in self.menuBar.actions():
if not a.menu() or a.menu().title() != menuName:
continue
if a.menu() != self.menuHelp:
helpMenuAction = a
actionMenu = a
break
# not found, add a new menu before the help menu
if actionMenu is None:
menu = QMenu(menuName, self)
if helpMenuAction is not None:
actionMenu = self.menuBar.insertMenu(helpMenuAction, menu)
else:
actionMenu = self.menuBar.addMenu(menu)
menu = actionMenu.menu()
menuActions = menu.actions()
# get the placeholder's position to insert before it
pos = 0
for pos in range(len(menuActions)):
if menuActions[pos].isSeparator() and menuActions[pos].objectName().endswith("_placeholder"):
menuActions[pos].setVisible(True)
break
if pos < len(menuActions):
before = menuActions[pos]
menu.insertAction(before, action)
else:
menu.addAction(action)
actionMenu.setVisible(True) # show the menu
if menuName not in self._registeredDbActions:
self._registeredDbActions[menuName] = list()
self._registeredDbActions[menuName].append(action)
if callback is not None:
action.triggered.connect(invoke_callback)
return True
def invokeCallback(self, callback, *params):
""" Call a method passing the selected item in the database tree,
the sender (usually a QAction), the plugin mainWindow and
optionally additional parameters.
This method takes care to override and restore the cursor,
but also catches exceptions and displays the error dialog.
"""
with OverrideCursor(Qt.CursorShape.WaitCursor):
try:
callback(self.tree.currentItem(), self.sender(), self, *params)
except BaseError as e:
# catch database errors and display the error dialog
DlgDbError.showError(e, self)
def unregisterAction(self, action, menuName):
if not hasattr(self, '_registeredDbActions'):
return
if menuName is None or menuName == "":
self.removeAction(action)
if menuName in self._registeredDbActions:
if self._registeredDbActions[menuName].count(action) > 0:
self._registeredDbActions[menuName].remove(action)
action.deleteLater()
return True
for a in self.menuBar.actions():
if not a.menu() or a.menu().title() != menuName:
continue
menu = a.menu()
menuActions = menu.actions()
menu.removeAction(action)
if menu.isEmpty(): # hide the menu
a.setVisible(False)
if menuName in self._registeredDbActions:
if self._registeredDbActions[menuName].count(action) > 0:
self._registeredDbActions[menuName].remove(action)
# hide the placeholder if there're no other registered actions
if len(self._registeredDbActions[menuName]) <= 0:
for i in range(len(menuActions)):
if menuActions[i].isSeparator() and menuActions[i].objectName().endswith("_placeholder"):
menuActions[i].setVisible(False)
break
action.deleteLater()
return True
return False
def unregisterAllActions(self):
if not hasattr(self, '_registeredDbActions'):
return
for menuName in self._registeredDbActions:
for action in list(self._registeredDbActions[menuName]):
self.unregisterAction(action, menuName)
del self._registeredDbActions
def close_tab(self, index):
widget = self.tabs.widget(index)
if widget not in [self.info, self.table, self.preview]:
if hasattr(widget, "close"):
if widget.close():
self.tabs.removeTab(index)
widget.deleteLater()
else:
self.tabs.removeTab(index)
widget.deleteLater()
def toolBarOrientation(self):
button_style = Qt.ToolButtonStyle.ToolButtonIconOnly
if self.toolBar.orientation() == Qt.Orientation.Horizontal:
button_style = Qt.ToolButtonStyle.ToolButtonTextBesideIcon
widget = self.toolBar.widgetForAction(self.actionImport)
widget.setToolButtonStyle(button_style)
widget = self.toolBar.widgetForAction(self.actionExport)
widget.setToolButtonStyle(button_style)
def setupUi(self):
self.setWindowTitle(self.tr("DB Manager"))
self.setWindowIcon(GuiUtils.get_icon("dbmanager"))
self.resize(QSize(700, 500).expandedTo(self.minimumSizeHint()))
# create central tab widget and add the first 3 tabs: info, table and preview
self.tabs = QTabWidget()
self.info = InfoViewer(self)
self.tabs.addTab(self.info, self.tr("Info"))
self.table = TableViewer(self)
self.tabs.addTab(self.table, self.tr("Table"))
self.preview = LayerPreview(self)
self.tabs.addTab(self.preview, self.tr("Preview"))
self.setCentralWidget(self.tabs)
# display close button for all tabs but the first 3 ones, i.e.
# HACK: just hide the close button where not needed (GS)
self.tabs.setTabsClosable(True)
self.tabs.tabCloseRequested.connect(self.close_tab)
tabbar = self.tabs.tabBar()
for i in range(3):
btn = tabbar.tabButton(i, QTabBar.ButtonPosition.RightSide) if tabbar.tabButton(i, QTabBar.ButtonPosition.RightSide) else tabbar.tabButton(i, QTabBar.ButtonPosition.LeftSide)
btn.resize(0, 0)
btn.hide()
# Creates layout for message bar
self.layout = QGridLayout(self.info)
self.layout.setContentsMargins(0, 0, 0, 0)
spacerItem = QSpacerItem(20, 40, QSizePolicy.Policy.Minimum, QSizePolicy.Policy.Expanding)
self.layout.addItem(spacerItem, 1, 0, 1, 1)
# init messageBar instance
self.infoBar = QgsMessageBar(self.info)
sizePolicy = QSizePolicy(QSizePolicy.Policy.Minimum, QSizePolicy.Policy.Fixed)
self.infoBar.setSizePolicy(sizePolicy)
self.layout.addWidget(self.infoBar, 0, 0, 1, 1)
# create database tree
self.dock = QDockWidget(self.tr("Providers"), self)
self.dock.setObjectName("DB_Manager_DBView")
self.dock.setFeatures(QDockWidget.DockWidgetFeature.DockWidgetMovable)
self.tree = DBTree(self)
self.dock.setWidget(self.tree)
self.addDockWidget(Qt.DockWidgetArea.LeftDockWidgetArea, self.dock)
# create status bar
self.statusBar = QStatusBar(self)
self.setStatusBar(self.statusBar)
# create menus
self.menuBar = QMenuBar(self)
self.menuDb = QMenu(self.tr("&Database"), self)
self.menuBar.addMenu(self.menuDb)
self.menuSchema = QMenu(self.tr("&Schema"), self)
actionMenuSchema = self.menuBar.addMenu(self.menuSchema)
self.menuTable = QMenu(self.tr("&Table"), self)
actionMenuTable = self.menuBar.addMenu(self.menuTable)
self.menuHelp = None # QMenu(self.tr("&Help"), self)
# actionMenuHelp = self.menuBar.addMenu(self.menuHelp)
self.setMenuBar(self.menuBar)
# create toolbar
self.toolBar = QToolBar(self.tr("Default"), self)
self.toolBar.setObjectName("DB_Manager_ToolBar")
self.addToolBar(self.toolBar)
# create menus' actions
# menu DATABASE
sep = self.menuDb.addSeparator()
sep.setObjectName("DB_Manager_DbMenu_placeholder")
sep.setVisible(False)
self.actionRefresh = QAction(QgsApplication.getThemeIcon("/mActionRefresh.svg"), self.tr("&Refresh"),
self.menuDb)
self.actionRefresh.triggered.connect(self.refreshActionSlot)
self.actionRefresh.setShortcut(QKeySequence("F5"))
self.menuDb.addAction(self.actionRefresh)
self.actionSqlWindow = QAction(GuiUtils.get_icon('mActionSQLWindow'),
self.tr("&SQL Window"),
self.menuDb)
self.actionSqlWindow.triggered.connect(self.runSqlWindow)
self.actionSqlWindow.setShortcut(QKeySequence("F2"))
self.menuDb.addAction(self.actionSqlWindow)
self.menuDb.addSeparator()
self.actionClose = QAction(QIcon(), self.tr("&Exit"), self.menuDb)
self.actionClose.triggered.connect(self.close)
self.actionClose.setShortcut(QKeySequence("CTRL+Q"))
self.menuDb.addAction(self.actionClose)
# menu SCHEMA
sep = self.menuSchema.addSeparator()
sep.setObjectName("DB_Manager_SchemaMenu_placeholder")
sep.setVisible(False)
actionMenuSchema.setVisible(False)
# menu TABLE
sep = self.menuTable.addSeparator()
sep.setObjectName("DB_Manager_TableMenu_placeholder")
sep.setVisible(False)
self.actionImport = self.menuTable.addAction(GuiUtils.get_icon("mActionDBImport"),
QApplication.translate("DBManager", "&Import Layer/File…"),
self.importActionSlot)
self.actionExport = self.menuTable.addAction(GuiUtils.get_icon("mActionDBExport"),
QApplication.translate("DBManager", "&Export to File…"),
self.exportActionSlot)
self.menuTable.addSeparator()
# self.actionShowSystemTables = self.menuTable.addAction(self.tr("Show system tables/views"), self.showSystemTables)
# self.actionShowSystemTables.setCheckable(True)
# self.actionShowSystemTables.setChecked(True)
actionMenuTable.setVisible(False)
# add actions to the toolbar
self.toolBar.addAction(self.actionRefresh)
self.toolBar.addAction(self.actionSqlWindow)
self.toolBar.addSeparator()
self.toolBar.addAction(self.actionImport)
self.toolBar.addAction(self.actionExport)
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