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# -*- coding: utf-8 -*-
"""
/***************************************************************************
Name : DB Manager
Description : Database manager plugin for QGIS
Date : Oct 13, 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. *
* *
***************************************************************************/
"""
from qgis.PyQt.QtCore import Qt, pyqtSignal
from qgis.PyQt.QtWidgets import QDialog, QMessageBox, QApplication
from .db_plugins.data_model import TableFieldsModel, TableConstraintsModel, TableIndexesModel
from .db_plugins.plugin import BaseError
from .dlg_db_error import DlgDbError
from .dlg_field_properties import DlgFieldProperties
from .dlg_add_geometry_column import DlgAddGeometryColumn
from .dlg_create_constraint import DlgCreateConstraint
from .dlg_create_index import DlgCreateIndex
from .ui.ui_DlgTableProperties import Ui_DbManagerDlgTableProperties as Ui_Dialog
class DlgTableProperties(QDialog, Ui_Dialog):
aboutToChangeTable = pyqtSignal()
def __init__(self, table, parent=None):
QDialog.__init__(self, parent)
self.table = table
self.setupUi(self)
self.db = self.table.database()
m = TableFieldsModel(self)
self.viewFields.setModel(m)
m = TableConstraintsModel(self)
self.viewConstraints.setModel(m)
m = TableIndexesModel(self)
self.viewIndexes.setModel(m)
self.btnAddColumn.clicked.connect(self.addColumn)
self.btnAddGeometryColumn.clicked.connect(self.addGeometryColumn)
self.btnEditColumn.clicked.connect(self.editColumn)
self.btnDeleteColumn.clicked.connect(self.deleteColumn)
self.btnAddConstraint.clicked.connect(self.addConstraint)
self.btnDeleteConstraint.clicked.connect(self.deleteConstraint)
self.btnAddIndex.clicked.connect(self.createIndex)
self.btnAddSpatialIndex.clicked.connect(self.createSpatialIndex)
self.btnDeleteIndex.clicked.connect(self.deleteIndex)
self.refresh()
def refresh(self):
self.populateViews()
self.checkSupports()
def checkSupports(self):
allowEditColumns = self.db.connector.hasTableColumnEditingSupport()
self.btnEditColumn.setEnabled(allowEditColumns)
self.btnDeleteColumn.setEnabled(allowEditColumns)
self.btnAddGeometryColumn.setEnabled(self.db.connector.canAddGeometryColumn((self.table.schemaName(), self.table.name)))
self.btnAddSpatialIndex.setEnabled(self.db.connector.canAddSpatialIndex((self.table.schemaName(), self.table.name)))
def populateViews(self):
self.populateFields()
self.populateConstraints()
self.populateIndexes()
def populateFields(self):
""" load field information from database """
m = self.viewFields.model()
m.clear()
for fld in self.table.fields():
m.append(fld)
for col in range(4):
self.viewFields.resizeColumnToContents(col)
def currentColumn(self):
""" returns row index of selected column """
sel = self.viewFields.selectionModel()
indexes = sel.selectedRows()
if len(indexes) == 0:
QMessageBox.information(self, self.tr("DB Manager"), self.tr("nothing selected"))
return -1
return indexes[0].row()
def addColumn(self):
""" open dialog to set column info and add column to table """
dlg = DlgFieldProperties(self, None, self.table)
if not dlg.exec_():
return
fld = dlg.getField()
QApplication.setOverrideCursor(Qt.WaitCursor)
self.aboutToChangeTable.emit()
try:
# add column to table
self.table.addField(fld)
self.refresh()
except BaseError as e:
DlgDbError.showError(e, self)
return
finally:
QApplication.restoreOverrideCursor()
def addGeometryColumn(self):
""" open dialog to add geometry column """
dlg = DlgAddGeometryColumn(self, self.table)
if not dlg.exec_():
return
self.refresh()
def editColumn(self):
""" open dialog to change column info and alter table appropriately """
index = self.currentColumn()
if index == -1:
return
m = self.viewFields.model()
# get column in table
# (there can be missing number if someone deleted a column)
fld = m.getObject(index)
dlg = DlgFieldProperties(self, fld, self.table)
if not dlg.exec_():
return
new_fld = dlg.getField(True)
QApplication.setOverrideCursor(Qt.WaitCursor)
self.aboutToChangeTable.emit()
try:
fld.update(new_fld.name, new_fld.type2String(), new_fld.notNull, new_fld.default2String())
self.refresh()
except BaseError as e:
DlgDbError.showError(e, self)
return
finally:
QApplication.restoreOverrideCursor()
def deleteColumn(self):
""" delete currently selected column """
index = self.currentColumn()
if index == -1:
return
m = self.viewFields.model()
fld = m.getObject(index)
res = QMessageBox.question(self, self.tr("Are you sure"), self.tr("really delete column '%s'?") % fld.name,
QMessageBox.Yes | QMessageBox.No)
if res != QMessageBox.Yes:
return
QApplication.setOverrideCursor(Qt.WaitCursor)
self.aboutToChangeTable.emit()
try:
fld.delete()
self.refresh()
except BaseError as e:
DlgDbError.showError(e, self)
return
finally:
QApplication.restoreOverrideCursor()
def populateConstraints(self):
constraints = self.table.constraints()
if constraints is None:
self.hideConstraints() # not supported
return
m = self.viewConstraints.model()
m.clear()
for constr in constraints:
m.append(constr)
for col in range(3):
self.viewConstraints.resizeColumnToContents(col)
def hideConstraints(self):
index = self.tabs.indexOf(self.tabConstraints)
if index >= 0:
self.tabs.setTabEnabled(index, False)
def addConstraint(self):
""" add primary key or unique constraint """
dlg = DlgCreateConstraint(self, self.table)
if not dlg.exec_():
return
self.refresh()
def deleteConstraint(self):
""" delete a constraint """
index = self.currentConstraint()
if index == -1:
return
m = self.viewConstraints.model()
constr = m.getObject(index)
res = QMessageBox.question(self, self.tr("Are you sure"),
self.tr("really delete constraint '%s'?") % constr.name,
QMessageBox.Yes | QMessageBox.No)
if res != QMessageBox.Yes:
return
QApplication.setOverrideCursor(Qt.WaitCursor)
self.aboutToChangeTable.emit()
try:
constr.delete()
self.refresh()
except BaseError as e:
DlgDbError.showError(e, self)
return
finally:
QApplication.restoreOverrideCursor()
def currentConstraint(self):
""" returns row index of selected index """
sel = self.viewConstraints.selectionModel()
indexes = sel.selectedRows()
if len(indexes) == 0:
QMessageBox.information(self, self.tr("DB Manager"), self.tr("nothing selected"))
return -1
return indexes[0].row()
def populateIndexes(self):
indexes = self.table.indexes()
if indexes is None:
self.hideIndexes()
return
m = self.viewIndexes.model()
m.clear()
for idx in indexes:
m.append(idx)
for col in range(2):
self.viewIndexes.resizeColumnToContents(col)
def hideIndexes(self):
index = self.tabs.indexOf(self.tabIndexes)
if index >= 0:
self.tabs.setTabEnabled(index, False)
def createIndex(self):
""" create an index """
dlg = DlgCreateIndex(self, self.table)
if not dlg.exec_():
return
self.refresh()
def createSpatialIndex(self):
""" create spatial index for the geometry column """
if self.table.type != self.table.VectorType:
QMessageBox.information(self, self.tr("DB Manager"), self.tr("The selected table has no geometry"))
return
res = QMessageBox.question(self, self.tr("Create?"),
self.tr("Create spatial index for field %s?") % self.table.geomColumn,
QMessageBox.Yes | QMessageBox.No)
if res != QMessageBox.Yes:
return
# TODO: first check whether the index doesn't exist already
QApplication.setOverrideCursor(Qt.WaitCursor)
self.aboutToChangeTable.emit()
try:
self.table.createSpatialIndex()
self.refresh()
except BaseError as e:
DlgDbError.showError(e, self)
return
finally:
QApplication.restoreOverrideCursor()
def currentIndex(self):
""" returns row index of selected index """
sel = self.viewIndexes.selectionModel()
indexes = sel.selectedRows()
if len(indexes) == 0:
QMessageBox.information(self, self.tr("DB Manager"), self.tr("Nothing selected"))
return -1
return indexes[0].row()
def deleteIndex(self):
""" delete currently selected index """
index = self.currentIndex()
if index == -1:
return
m = self.viewIndexes.model()
idx = m.getObject(index)
res = QMessageBox.question(self, self.tr("Are you sure"), self.tr("really delete index '%s'?") % idx.name,
QMessageBox.Yes | QMessageBox.No)
if res != QMessageBox.Yes:
return
QApplication.setOverrideCursor(Qt.WaitCursor)
self.aboutToChangeTable.emit()
try:
idx.delete()
self.refresh()
except BaseError as e:
DlgDbError.showError(e, self)
return
finally:
QApplication.restoreOverrideCursor()
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