second try...

Signed-off-by: fpdb-mme <jUrner@arcor.de>
This commit is contained in:
fpdb-mme 2009-10-27 09:01:06 +01:00
parent 9144c7ae68
commit 30103c5cb2

419
pyfpdb/DatabaseManager.py Normal file
View File

@ -0,0 +1,419 @@
import os
import pygtk
pygtk.require('2.0')
import gtk
#*******************************************************************************************************
class DatabaseManager(object):
DatabaseTypes = {}
def __init__(self, defaultDatabaseType=None):
self._defaultDatabaseType = defaultDatabaseType
def set_default_database_type(self, databaseType):
self._defaultDatabaseType = defaultDatabaseType
def get_default_database_type(self):
return self._defaultDatabaseType
class DatabaseTypeMeta(type):
def __new__(klass, name, bases, kws):
newKlass = type.__new__(klass, name, bases, kws)
if newKlass.Type is not None:
if newKlass.Type in DatabaseManager.DatabaseTypes:
raise ValueError('data base type already registered for: %s' % newKlass.Type)
DatabaseManager.DatabaseTypes[newKlass.Type] = newKlass
return newKlass
class DatabaseTypeBase(object):
__metaclass__ = DatabaseTypeMeta
Type = None
DBHasHost = 0x1
DBHasFile = 0x2
DBHasPort = 0x4
DBHasUser = 0x8
DBHasPassword = 0x10
DBHasDatabase = 0x20
DBHasName = 0x40
DBFlagsFileSystem = DBHasFile|DBHasName
DBFlagsServer = DBHasHost|DBHasPort|DBHasUser|DBHasPassword|DBHasDatabase|DBHasName
def __init__(self, host='', file='', port=0, user='', password='', database='', table='', name=''):
self.host = host
self.file = file
self.port = port
self.user = user
self.password = password
self.database = database
self.name = name
class DatabaseTypePostgres(DatabaseTypeBase):
Type = 'postgres'
Flags = DatabaseTypeBase.DBFlagsServer
def __init__(self, host='localhost', file='', port=5432, user='postgres', password='', database='fpdb', name=''):
DatabaseTypeBase.__init__(self, host=host, file=file, port=port, user=user, password=password, database=database, name=name)
class DatabaseTypeMysql(DatabaseTypeBase):
Type = 'mysql'
Flags = DatabaseTypeBase.DBFlagsServer
def __init__(self, host='localhost', file='root', port=3306, user='', password='', database='fpdb', name=''):
DatabaseTypeBase.__init__(self, host=host, file=file, port=port, user=user, password=password, database=database, name=name)
class DatabaseTypeSqLite(DatabaseTypeBase):
Type = 'sqlite'
Flags = DatabaseTypeBase.DBFlagsFileSystem
def __init__(self, host='', file='', port=0, user='', password='',database='', name=''):
DatabaseTypeBase.__init__(self, host=host, file=file, port=port, user=user, password=password, database=database, name=name)
#***************************************************************************************************************************
class MyFileChooserButton(gtk.HBox):
#NOTE: for some weird reason it is impossible to let the user choose a non exiting filename with gtk.FileChooserButton, so impl our own on the fly
def __init__(self):
gtk.HBox.__init__(self)
self.set_homogeneous(False)
self.entry = gtk.Entry()
self.button = gtk.Button('...')
self.button.connect('clicked', self.on_button_clicked)
# layout widgets
self.pack_start(self.entry, True, True)
self.pack_start(self.button, False, False)
def get_filename(self):
return self.entry.get_text()
def set_filename(self, name):
self.entry.set_text(name)
def on_button_clicked(self, button):
dlg = gtk.FileChooserDialog(
title='Choose an exiting database file or type in name of a new one',
parent=None,
action=gtk.FILE_CHOOSER_ACTION_SAVE,
buttons=(
gtk.STOCK_CANCEL, gtk.RESPONSE_REJECT,
gtk.STOCK_OK, gtk.RESPONSE_OK,
),
backend=None
)
dlg.connect('confirm-overwrite', self.on_dialog_confirm_overwrite)
dlg.set_default_response(gtk.RESPONSE_OK)
dlg.set_do_overwrite_confirmation(True)
if dlg.run() == gtk.RESPONSE_OK:
self.set_filename(dlg.get_filename())
dlg.destroy()
#TODO: when the user selects a sqLite database file we got three possible actions
# 1. user types in a new filename. easy one, create the file
# 2. user selectes a file with the intention to overwrite it
# 3. user selects a file with the intention to plug an existing database file in
#IDEA: impl open_existing as plug in, never overwrite, cos we can not guess
#PROBLEMS: how to validate an existing file is a database?
def on_dialog_confirm_overwrite(self, dlg):
print dlg.get_filename()
gtk.FILE_CHOOSER_CONFIRMATION_CONFIRM
#The file chooser will present its stock dialog to confirm overwriting an existing file.
gtk.FILE_CHOOSER_CONFIRMATION_ACCEPT_FILENAME
#The file chooser will terminate and accept the user's choice of a file name.
gtk.FILE_CHOOSER_CONFIRMATION_SELECT_AGAIN
#
class DialogDatabaseProperties(gtk.Dialog):
def __init__(self, databaseManager, database=None,parent=None):
gtk.Dialog.__init__(self,
title="My dialog",
parent=parent,
flags=gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
buttons=(
gtk.STOCK_CANCEL, gtk.RESPONSE_REJECT,
gtk.STOCK_OK, gtk.RESPONSE_ACCEPT,
)
)
self.connect('response', self.on_dialog_response)
# setup widget
self.widgetDatabaseProperties = WidgetDatabaseProperties(databaseManager,database=database)
self.vbox.pack_start(self.widgetDatabaseProperties, True, True)
self.widgetDatabaseProperties.show_all()
def get_database(self):
return self.widgetDatabaseProperties.get_database()
def on_dialog_response(self, dlg, responseId):
if responseId == gtk.RESPONSE_REJECT:
pass
elif responseId == gtk.RESPONSE_ACCEPT:
pass
class WidgetDatabaseProperties(gtk.VBox):
def __init__(self, databaseManager, database=None):
gtk.VBox.__init__(self)
self.fieldWidgets = ( #fieldName--> fieldHandler
{
'label': gtk.Label('Name:'),
'widget': gtk.Entry(),
'getter': lambda widget, database: setattr(database, 'name', widget.get_text() ),
'setter': lambda widget, database: widget.set_text(database.name),
'isSensitive': lambda database: bool(database.Flags & database.DBHasName),
'tooltip': '',
},
{
'label': gtk.Label('File:'),
'widget': MyFileChooserButton(),
'getter': lambda widget, database: lambda widget, database: setattr(database, 'file', widget.get_filename() ),
'setter': lambda widget, database: widget.set_filename(database.file),
'isSensitive': lambda database: bool(database.Flags & database.DBHasFile),
'tooltip': '',
},
{
'label': gtk.Label('Host:'),
'widget': gtk.Entry(),
'getter': lambda widget, database: setattr(database, 'host', widget.get_text() ),
'setter': lambda widget, database: widget.set_text(database.host),
'isSensitive': lambda database: bool(database.Flags & database.DBHasHost),
'tooltip': '',
},
{
'label': gtk.Label('Port:'),
'widget': gtk.SpinButton(adjustment=gtk.Adjustment(value=0, lower=0, upper=999999, step_incr=1, page_incr=10) ),
'getter': lambda widget, database: setattr(database, 'port', widget.get_value() ),
'setter': lambda widget, database: widget.set_value(database.port),
'isSensitive': lambda database: bool(database.Flags & database.DBHasPort),
'tooltip': '',
},
{
'label': gtk.Label('User:'),
'widget': gtk.Entry(),
'getter': lambda widget, database: setattr(database, 'user', widget.get_text() ),
'setter': lambda widget, database: widget.set_text(database.user),
'isSensitive': lambda database: bool(database.Flags & database.DBHasUser),
'tooltip': '',
},
{
'label': gtk.Label('Pwd:'),
'widget': gtk.Entry(),
'getter': lambda widget, database: setattr(database, 'password', widget.get_text() ),
'setter': lambda widget, database: widget.set_text(database.password),
'isSensitive': lambda database: bool(database.Flags & database.DBHasPassword),
'tooltip': '',
},
{
'label': gtk.Label('DB:'),
'widget': gtk.Entry(),
'getter': lambda widget, database: setattr(database, 'database', widget.get_text() ),
'setter': lambda widget, database: widget.set_text(database.database),
'isSensitive': lambda database: bool(database.Flags & database.DBHasDatabase),
'tooltip': 'enter name of the database to create',
},
)
# setup database type combo
self.comboType = gtk.ComboBox()
listStore= gtk.ListStore(str, str)
self.comboType.set_model(listStore)
cell = gtk.CellRendererText()
self.comboType.pack_start(cell, True)
self.comboType.add_attribute(cell, 'text', 0)
# fill out combo with database type. we store (displayName, databaseType) in our model for later lookup
for dbType, dbDisplayName in sorted([(klass.Type, klass.Type) for klass in databaseManager.DatabaseTypes.values()]):
listStore.append( (dbDisplayName, dbType) )
self.comboType.connect('changed', self.on_combo_type_changed)
# init and layout field widgets
self.pack_start(self.comboType, False, False, 2)
table = gtk.Table(rows=len(self.fieldWidgets) +1, columns=2, homogeneous=False)
self.pack_start(table, False, False, 2)
for i,fieldWidget in enumerate(self.fieldWidgets):
fieldWidget['widget'].set_tooltip_text(fieldWidget['tooltip'])
table.attach(fieldWidget['label'], 0, 1, i, i+1, xoptions=gtk.FILL)
table.attach(fieldWidget['widget'], 1, 2, i, i+1)
# init widget
# if a database has been passed user is not allowed to change database type
if database is None:
self.comboType.set_button_sensitivity(gtk.SENSITIVITY_ON)
else:
self.comboType.set_button_sensitivity(gtk.SENSITIVITY_OFF)
# set current database
self.databaseManager = databaseManager
self.database= None
if database is None:
databaseType = self.databaseManager.get_default_database_type()
if databaseType is not None:
database = databaseType()
if database is not None:
self.set_database(database)
def on_combo_type_changed(self, combo):
i = self.comboType.get_active()
if i > -1:
# change database if necessary
currentDatabaseType = self.comboType.get_model()[i][1]
if currentDatabaseType != self.database.Type:
newDatabase = self.databaseManager.DatabaseTypes[currentDatabaseType]()
self.set_database(newDatabase)
def set_database(self, database):
self.database = database
# adjust database type combo if necessary
i = self.comboType.get_active()
if i == -1:
currentDatabaseType = None
else:
currentDatabaseType = self.comboType.get_model()[i][1]
if currentDatabaseType != self.database.Type:
for i, row in enumerate(self.comboType.get_model()):
if row[1] == self.database.Type:
self.comboType.set_active(i)
break
else:
raise ValueError('unknown database type')
# adjust field widgets to database
for fieldWidget in self.fieldWidgets:
isSensitive = fieldWidget['isSensitive'](self.database)
fieldWidget['widget'].set_sensitive(isSensitive)
fieldWidget['label'].set_sensitive(isSensitive)
fieldWidget['setter'](fieldWidget['widget'], self.database)
def get_database(self):
for fieldWidget in self.fieldWidgets:
fieldWidget['getter'](fieldWidget['widget'], self.database)
return self.database
#TODO: just boilerplate code
class DialogDatabase(gtk.Dialog):
def __init__(self, databaseManager, parent=None):
gtk.Dialog.__init__(self,
title="My dialog",
parent=parent,
flags=gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
buttons=(
gtk.STOCK_CANCEL, gtk.RESPONSE_REJECT,
gtk.STOCK_OK, gtk.RESPONSE_ACCEPT,
))
#self.set_size_request(260, 250)
self.databaseManager = databaseManager
#TODO: dono how to make word wrap work as expected
self.labelInfo = gtk.Label('database management')
self.labelInfo.set_line_wrap(True)
self.labelInfo.set_selectable(True)
self.labelInfo.set_single_line_mode(False)
self.labelInfo.set_alignment(0, 0)
# database management buttons
#TODO: bit messy the distinction New/Add/Edit. we'd have to pass three flags to DialogDatabaseProperties
# to handle this. maybe drop Edit (is just a Remove + Add), to keep things simple
self.buttonDatabaseNew = gtk.Button("New..")
self.buttonDatabaseNew.set_tooltip_text('creates a new database')
self.buttonDatabaseNew.connect('clicked', self.on_button_database_new_clicked)
self.buttonDatabaseAdd = gtk.Button("Add..")
self.buttonDatabaseAdd.set_tooltip_text('adds an existing database')
self.buttonDatabaseAdd.connect('clicked', self.on_button_database_add_clicked)
self.buttonDatabaseEdit = gtk.Button("Edit..")
self.buttonDatabaseEdit.set_tooltip_text('edit database settings')
#self.buttonDatabaseEdit.connect('clicked', self.on_button_database_edit_clicked)
self.buttonDatabaseRemove = gtk.Button("Remove")
self.buttonDatabaseRemove.set_tooltip_text('removes the database from the list')
#TODO: i dont think we should do any real database management here. maybe drop it
self.buttonDatabaseDelete = gtk.Button("Delete")
self.buttonDatabaseDelete.set_tooltip_text('removes the database from the list and deletes it')
# database tree
self.treeDatabases = gtk.TreeView()
store = gtk.ListStore(str, str, str)
self.treeDatabases.set_model(store)
columns = ('Name', 'Status', 'Type')
for i, column in enumerate(columns):
col = gtk.TreeViewColumn(column, gtk.CellRendererText(), text=i)
self.treeDatabases.append_column(col)
# layout widgets
self.vbox.pack_start(self.labelInfo, False, False, 2)
self.vbox.pack_start(gtk.HSeparator(), False, False, 2)
hbox = gtk.HBox()
self.vbox.add(hbox)
hbox.set_homogeneous(False)
vbox = gtk.VBox()
hbox.pack_start(vbox, False, False, 2)
vbox.pack_start(self.buttonDatabaseNew, False, False, 2)
vbox.pack_start(self.buttonDatabaseAdd, False, False, 2)
vbox.pack_start(self.buttonDatabaseEdit, False, False, 2)
vbox.pack_start(self.buttonDatabaseRemove, False, False, 2)
vbox.pack_start(self.buttonDatabaseDelete, False, False, 2)
box = gtk.VBox()
vbox.pack_start(box, True, True, 0)
hbox.pack_start(gtk.VSeparator(), False, False, 2)
hbox.pack_end(self.treeDatabases, True, True, 2)
self.show_all()
#TODO: for some reason i have to click OK/Cancel twice to close the dialog
def on_button_database_new_clicked(self, button):
dlg = DialogDatabaseProperties(self.databaseManager, parent=self)
if dlg.run() == gtk.RESPONSE_REJECT:
pass
if dlg.run() == gtk.RESPONSE_ACCEPT:
database = dlg.get_database()
self.treeDatabases.get_model().append( (database.name, 'foo', database.Type) )
dlg.destroy()
def on_button_database_add_clicked(self, button):
dlg = DialogDatabaseProperties(self.databaseManager, parent=self)
if dlg.run() == gtk.RESPONSE_REJECT:
pass
if dlg.run() == gtk.RESPONSE_ACCEPT:
database = dlg.get_database()
self.treeDatabases.get_model().append( (database.name, 'foo', database.Type) )
dlg.destroy()
#def on_button_database_edit_clicked(self, button):
# dlg = DialogDatabaseProperties(self.databaseManager, parent=self)
# if dlg.run() == gtk.RESPONSE_REJECT:
# pass
# if dlg.run() == gtk.RESPONSE_ACCEPT:
# database = dlg.get_database()
# self.treeDatabases.get_model().append( (database.name, 'foo', database.Type) )
#
# dlg.destroy()
#**************************************************************************************************
if __name__ == '__main__':
#d = DialogDatabaseProperties(
# DatabaseManager(defaultDatabaseType=DatabaseTypeSqLite),
#database=DatabaseTypePostgres(),
# database=None,
# )
d = DialogDatabase(DatabaseManager(defaultDatabaseType=DatabaseTypeSqLite))
d.connect("destroy", gtk.main_quit)
d.run()
#gtk.main()