Source Code for Module camelot.camelot.view.controls.filter

 1  #  ============================================================================ 
 2  # 
 3  #  Copyright (C) 2007-2008 Conceptive Engineering bvba. All rights reserved. 
 4  #  www.conceptive.be / project-camelot@conceptive.be 
 5  # 
 6  #  This file is part of the Camelot Library. 
 7  # 
 8  #  This file may be used under the terms of the GNU General Public 
 9  #  License version 2.0 as published by the Free Software Foundation 
10  #  and appearing in the file LICENSE.GPL included in the packaging of 
11  #  this file.  Please review the following information to ensure GNU 
12  #  General Public Licensing requirements will be met: 
13  #  http://www.trolltech.com/products/qt/opensource.html 
14  # 
15  #  If you are unsure which license is appropriate for your use, please 
16  #  review the following information: 
17  #  http://www.trolltech.com/products/qt/licensing.html or contact 
18  #  project-camelot@conceptive.be. 
19  # 
20  #  This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE 
21  #  WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 
22  # 
23  #  For use of this library in commercial applications, please contact 
24  #  project-camelot@conceptive.be 
25  # 
26  #  ============================================================================ 
27   
28  """Controls to filter data""" 
29   
30  import logging 
31  logger = logging.getLogger('camelot.view.controls.filter') 
32   
33  from PyQt4 import QtGui 
34  from PyQt4 import QtCore 
35   
36  _ = lambda x:x 
37   
38   
39 -class FilterList(QtGui.QScrollArea): 
40    """A list with filters that can be applied on a query in the tableview""" 
41    
42 -  def __init__(self, items, parent): 
43      """@param item list of tubles (name, choices) for constructing the 
44      different filterboxes 
45      """ 
46      QtGui.QScrollArea.__init__(self, parent) 
47      self.widget = QtGui.QWidget() 
48      layout = QtGui.QVBoxLayout() 
49      self.filters = [] 
50      layout.addWidget(QtGui.QLabel(_('Filter'), self)) 
51       
52      for filter,(name,options) in items: 
53        widget = filter.render(self, name, options) 
54        layout.addWidget(widget) 
55        self.filters.append(widget) 
56        self.connect(widget, 
57                     QtCore.SIGNAL('filter_changed'), 
58                     self.emit_filters_changed) 
59   
60      layout.addStretch() 
61      self.widget.setLayout(layout) 
62      self.setWidget(self.widget) 
63      self.setMaximumWidth(self.widget.width() + 10) 
64      if len(self.filters) == 0: 
65        self.setMaximumWidth(0) 
66   
67 -  def decorate_query(self, query): 
68      for filter in self.filters: 
69        query = filter.decorate_query(query) 
70      return query 
71   
72 -  def emit_filters_changed(self): 
73      logger.debug('filters changed') 
74      self.emit(QtCore.SIGNAL('filters_changed')) 
75   
76 -  def __del__(self): 
77      logger.debug('delete filter list') 
78