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327 lines
12 KiB
Python
327 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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"""
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/***************************************************************************
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Name : DB Manager
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Description : Database manager plugin for QGIS
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Date : Oct 13, 2011
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copyright : (C) 2011 by Giuseppe Sucameli
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email : brush.tyler@gmail.com
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The content of this file is based on
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- PG_Manager by Martin Dobias (GPLv2 license)
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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"""
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from builtins import str
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from builtins import range
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from qgis.PyQt.QtCore import Qt, QModelIndex
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from qgis.PyQt.QtWidgets import QItemDelegate, QComboBox, QDialog, QPushButton, QDialogButtonBox, QMessageBox, QApplication
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from qgis.PyQt.QtCore import QItemSelectionModel, pyqtSignal
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from qgis.utils import OverrideCursor
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from .db_plugins.data_model import TableFieldsModel
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from .db_plugins.plugin import DbError, ConnectionError
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from .dlg_db_error import DlgDbError
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from .ui.ui_DlgCreateTable import Ui_DbManagerDlgCreateTable as Ui_Dialog
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class TableFieldsDelegate(QItemDelegate):
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""" delegate with some special item editors """
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columnNameChanged = pyqtSignal()
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def __init__(self, field_types, parent=None):
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QItemDelegate.__init__(self, parent)
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self.fieldTypes = field_types
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def createEditor(self, parent, option, index):
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# special combobox for field type
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if index.column() == 1:
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cbo = QComboBox(parent)
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cbo.setEditable(True)
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cbo.setFrame(False)
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for item in self.fieldTypes:
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cbo.addItem(item)
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return cbo
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return QItemDelegate.createEditor(self, parent, option, index)
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def setEditorData(self, editor, index):
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""" load data from model to editor """
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m = index.model()
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if index.column() == 1:
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txt = m.data(index, Qt.DisplayRole)
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editor.setEditText(txt)
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else:
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# use default
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QItemDelegate.setEditorData(self, editor, index)
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def setModelData(self, editor, model, index):
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""" save data from editor back to model """
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if index.column() == 1:
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model.setData(index, editor.currentText())
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else:
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# use default
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QItemDelegate.setModelData(self, editor, model, index)
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if index.column() == 0:
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self.columnNameChanged.emit()
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class DlgCreateTable(QDialog, Ui_Dialog):
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GEOM_TYPES = ["POINT", "LINESTRING", "POLYGON", "MULTIPOINT", "MULTILINESTRING", "MULTIPOLYGON",
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"GEOMETRYCOLLECTION"]
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def __init__(self, item, parent=None):
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QDialog.__init__(self, parent)
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self.item = item
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self.setupUi(self)
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self.db = self.item.database()
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self.schemas = self.db.schemas()
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self.hasSchemas = self.schemas is not None
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self.fieldTypes = self.db.connector.fieldTypes()
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m = TableFieldsModel(self, True) # it's editable
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self.fields.setModel(m)
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self.fields.setColumnHidden(3, True) # hide Default column
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d = TableFieldsDelegate(self.fieldTypes, self)
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self.fields.setItemDelegate(d)
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self.fields.setColumnWidth(0, 140)
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self.fields.setColumnWidth(1, 140)
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self.fields.setColumnWidth(2, 50)
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b = QPushButton(self.tr("&Create"))
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self.buttonBox.addButton(b, QDialogButtonBox.ActionRole)
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self.btnAddField.clicked.connect(self.addField)
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self.btnDeleteField.clicked.connect(self.deleteField)
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self.btnFieldUp.clicked.connect(self.fieldUp)
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self.btnFieldDown.clicked.connect(self.fieldDown)
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b.clicked.connect(self.createTable)
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self.chkGeomColumn.clicked.connect(self.updateUi)
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self.fields.selectionModel().selectionChanged.connect(self.updateUiFields)
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d.columnNameChanged.connect(self.updatePkeyCombo)
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self.populateSchemas()
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self.updateUi()
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self.updateUiFields()
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def populateSchemas(self):
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self.cboSchema.clear()
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if not self.hasSchemas:
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self.hideSchemas()
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return
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index = -1
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for schema in self.schemas:
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self.cboSchema.addItem(schema.name)
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if hasattr(self.item, 'schema') and schema.name == self.item.schema().name:
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index = self.cboSchema.count() - 1
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self.cboSchema.setCurrentIndex(index)
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def hideSchemas(self):
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self.cboSchema.setEnabled(False)
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def updateUi(self):
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useGeom = self.chkGeomColumn.isChecked()
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self.cboGeomType.setEnabled(useGeom)
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self.editGeomColumn.setEnabled(useGeom)
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self.spinGeomDim.setEnabled(useGeom)
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self.editGeomSrid.setEnabled(useGeom)
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self.chkSpatialIndex.setEnabled(useGeom)
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def updateUiFields(self):
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fld = self.selectedField()
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if fld is not None:
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up_enabled = (fld != 0)
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down_enabled = (fld != self.fields.model().rowCount() - 1)
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del_enabled = True
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else:
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up_enabled, down_enabled, del_enabled = False, False, False
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self.btnFieldUp.setEnabled(up_enabled)
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self.btnFieldDown.setEnabled(down_enabled)
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self.btnDeleteField.setEnabled(del_enabled)
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def updatePkeyCombo(self, selRow=None):
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""" called when list of columns changes. if 'sel' is None, it keeps current index """
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if selRow is None:
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selRow = self.cboPrimaryKey.currentIndex()
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self.cboPrimaryKey.clear()
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m = self.fields.model()
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for row in range(m.rowCount()):
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name = m.data(m.index(row, 0))
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self.cboPrimaryKey.addItem(name)
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self.cboPrimaryKey.setCurrentIndex(selRow)
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def addField(self):
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"""Adds new field to the end of field table """
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m = self.fields.model()
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newRow = m.rowCount()
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m.insertRows(newRow, 1)
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indexName = m.index(newRow, 0, QModelIndex())
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indexType = m.index(newRow, 1, QModelIndex())
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indexNull = m.index(newRow, 2, QModelIndex())
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m.setData(indexName, "new_field")
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colType = self.fieldTypes[0]
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if newRow == 0:
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# adding the first row, use auto-incrementing column type if any
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if "serial" in self.fieldTypes: # PostgreSQL
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colType = "serial"
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m.setData(indexType, colType)
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m.setData(indexNull, None, Qt.DisplayRole)
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m.setData(indexNull, Qt.Unchecked, Qt.CheckStateRole)
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# selects the new row
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sel = self.fields.selectionModel()
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sel.select(indexName, QItemSelectionModel.Rows | QItemSelectionModel.ClearAndSelect)
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# starts editing
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self.fields.edit(indexName)
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self.updatePkeyCombo(0 if newRow == 0 else None)
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def selectedField(self):
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sel = self.fields.selectedIndexes()
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if len(sel) < 1:
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return None
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return sel[0].row()
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def deleteField(self):
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"""Deletes selected field """
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row = self.selectedField()
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if row is None:
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QMessageBox.information(self, self.tr("DB Manager"), self.tr("No field selected."))
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else:
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self.fields.model().removeRows(row, 1)
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self.updatePkeyCombo()
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def fieldUp(self):
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""" move selected field up """
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row = self.selectedField()
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if row is None:
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QMessageBox.information(self, self.tr("DB Manager"), self.tr("No field selected."))
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return
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if row == 0:
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QMessageBox.information(self, self.tr("DB Manager"), self.tr("Field is already at the top."))
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return
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# take row and reinsert it
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rowdata = self.fields.model().takeRow(row)
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self.fields.model().insertRow(row - 1, rowdata)
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# set selection again
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index = self.fields.model().index(row - 1, 0, QModelIndex())
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self.fields.selectionModel().select(index, QItemSelectionModel.Rows | QItemSelectionModel.ClearAndSelect)
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self.updatePkeyCombo()
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def fieldDown(self):
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""" move selected field down """
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row = self.selectedField()
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if row is None:
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QMessageBox.information(self, self.tr("DB Manager"), self.tr("No field selected."))
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return
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if row == self.fields.model().rowCount() - 1:
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QMessageBox.information(self, self.tr("DB Manager"), self.tr("Field is already at the bottom."))
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return
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# take row and reinsert it
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rowdata = self.fields.model().takeRow(row)
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self.fields.model().insertRow(row + 1, rowdata)
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# set selection again
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index = self.fields.model().index(row + 1, 0, QModelIndex())
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self.fields.selectionModel().select(index, QItemSelectionModel.Rows | QItemSelectionModel.ClearAndSelect)
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self.updatePkeyCombo()
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def createTable(self):
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"""Creates table with chosen fields, optionally add a geometry column """
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if not self.hasSchemas:
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schema = None
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else:
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schema = str(self.cboSchema.currentText())
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if len(schema) == 0:
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QMessageBox.information(self, self.tr("DB Manager"), self.tr("A valid schema must be selected first."))
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return
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table = str(self.editName.text())
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if len(table) == 0:
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QMessageBox.information(self, self.tr("DB Manager"), self.tr("A valid table name is required."))
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return
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m = self.fields.model()
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if m.rowCount() == 0:
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QMessageBox.information(self, self.tr("DB Manager"), self.tr("At least one field is required."))
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return
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useGeomColumn = self.chkGeomColumn.isChecked()
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if useGeomColumn:
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geomColumn = str(self.editGeomColumn.text())
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if len(geomColumn) == 0:
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QMessageBox.information(self, self.tr("DB Manager"), self.tr("A name is required for the geometry column."))
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return
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geomType = self.GEOM_TYPES[self.cboGeomType.currentIndex()]
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geomDim = self.spinGeomDim.value()
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try:
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geomSrid = int(self.editGeomSrid.text())
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except ValueError:
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geomSrid = 0
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useSpatialIndex = self.chkSpatialIndex.isChecked()
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flds = m.getFields()
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pk_index = self.cboPrimaryKey.currentIndex()
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if pk_index >= 0:
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flds[pk_index].primaryKey = True
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# commit to DB
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with OverrideCursor(Qt.WaitCursor):
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try:
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if not useGeomColumn:
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self.db.createTable(table, flds, schema)
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else:
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geom = geomColumn, geomType, geomSrid, geomDim, useSpatialIndex
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self.db.createVectorTable(table, flds, geom, schema)
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except (ConnectionError, DbError) as e:
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DlgDbError.showError(e, self)
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# clear UI
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self.editName.clear()
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self.fields.model().removeRows(0, self.fields.model().rowCount())
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self.cboPrimaryKey.clear()
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self.chkGeomColumn.setChecked(False)
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self.chkSpatialIndex.setChecked(False)
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self.editGeomSrid.clear()
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self.cboGeomType.setEnabled(False)
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self.editGeomColumn.setEnabled(False)
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self.spinGeomDim.setEnabled(False)
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self.editGeomSrid.setEnabled(False)
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self.chkSpatialIndex.setEnabled(False)
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QMessageBox.information(self, self.tr("DB Manager"), self.tr("Table created successfully."))
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