Source Code for Module library.pyjamas.django.Form

  1  """ Pyjamas Django Forms Integration 
  2   
  3      Copyright (C) 2009 Luke Kenneth Casson Leighton <lkcl@lkcl.net> 
  4   
  5  """ 
  6   
  7  from pyjamas.ui.TextBox import TextBox 
  8  from pyjamas.ui.Grid import Grid 
  9  from pyjamas.ui.FormPanel import FormPanel 
 10  #from pyjamas.ui.Composite import Composite 
 11  from pyjamas.log import writebr 
 12   
 13  from pyjamas.ui.TextBox import TextBox 
 14   
 15 -class CharField(TextBox): 
 16 -    def __init__(self, **kwargs): 
 17          TextBox.__init__(self) 
 18          self.max_length = kwargs.get('max_length', None) 
 19          self.min_length = kwargs.get('min_length', None) 
 20          self.required = kwargs.get('required', None) 
 21          if kwargs.get('initial'): 
 22              self.setValue(kwargs['initial']) 
 23   
 24 -    def setValue(self, val): 
 25          if val is None: 
 26              val = '' 
 27          self.setText(val) 
 28   
 29 -    def getValue(self): 
 30          return self.getText() 
 31   
 32 -class IntegerField(TextBox): 
 33 -    def __init__(self, **kwargs): 
 34          #writebr("MAKING INTEGERFIELD from kwargs: %s" % kwargs) 
 35          TextBox.__init__(self) 
 36          self.required = kwargs.get('required', None) 
 37          if kwargs.get('initial'): 
 38              self.setValue(kwargs['initial']) 
 39   
 40 -    def setValue(self, val): 
 41          if val is None: 
 42              val = '' 
 43          self.setText(val) 
 44   
 45 -    def getValue(self): 
 46          writebr('GETTING VALUE< self.text: %s' % self.getText()) 
 47          return int(self.getText()) 
 48   
 49 -class FloatField(TextBox): 
 50 -    def __init__(self, **kwargs): 
 51          TextBox.__init__(self) 
 52          self.max_length = kwargs.get('max_length', None) 
 53          self.min_length = kwargs.get('min_length', None) 
 54          self.required = kwargs.get('required', None) 
 55          if kwargs.get('initial'): 
 56              self.setValue(kwargs['initial']) 
 57   
 58 -    def setValue(self, val): 
 59          if val is None: 
 60              val = '' 
 61          self.setText(val) 
 62   
 63 -    def getValue(self): 
 64          return self.getText() 
 65   
 66  widget_factory = {'CharField': CharField, 
 67                    'IntegerField': IntegerField, 
 68                    'FloatField': FloatField 
 69                   } 
 70   
 71 -class FormSaveGrid: 
 72   
 73 -    def __init__(self, sink): 
 74          self.sink = sink 
 75   
 76 -    def onRemoteResponse(self,  response, request_info): 
 77   
 78          method = request_info.method 
 79   
 80          writebr(repr(response)) 
 81          writebr("%d" % len(response)) 
 82          writebr("%s" % repr(response.keys())) 
 83   
 84          self.sink.save_respond(response) 
 85   
 86 -class FormGetGrid: 
 87   
 88 -    def __init__(self, sink): 
 89          self.sink = sink 
 90   
 91 -    def onRemoteResponse(self,  response, request_info): 
 92   
 93          method = request_info.method 
 94   
 95          writebr(method) 
 96          writebr(repr(response)) 
 97          writebr("%d" % len(response)) 
 98          writebr("%s" % repr(response.keys())) 
 99   
100          self.sink.do_get(response) 
101   
102 -    def onRemoteError(self, code, message, request_info): 
103          writebr("Server Error or Invalid Response: ERROR %d" % code + " - " + message + ' - Remote method : ' + request_info.method) 
104   
105 -class FormDescribeGrid: 
106   
107 -    def __init__(self, sink): 
108          self.sink = sink 
109   
110 -    def onRemoteResponse(self,  response, request_info): 
111   
112          method = request_info.method 
113   
114   
115          self.sink.do_describe(response) 
116   
117 -    def onRemoteError(self, code, message, request_info): 
118          writebr("Server Error or Invalid Response: ERROR %d" % code + " - " + message + ' - Remote method : ' + request_info.method) 
119   
120 -class Form(FormPanel): 
121   
122 -    def __init__(self, svc, **kwargs): 
123   
124          self.describe_listeners = [] 
125          if kwargs.has_key('listener'): 
126              listener = kwargs.pop('listener') 
127              self.addDescribeListener(listener) 
128   
129          if kwargs.has_key('data'): 
130              data = kwargs.pop('data') 
131          else: 
132              data = None 
133   
134          FormPanel.__init__(self, **kwargs) 
135          self.svc = svc 
136          self.grid = Grid() 
137          self.grid.resize(0, 3) 
138          self.add(self.grid) 
139          self.describer = FormDescribeGrid(self) 
140          self.saver = FormSaveGrid(self) 
141          self.getter = FormGetGrid(self) 
142          self.formsetup(data) 
143   
144 -    def addDescribeListener(self, l): 
145          self.describe_listeners.append(l) 
146   
147 -    def add_widget(self, description, widget): 
148          """ adds a widget, with error rows interspersed 
149          """ 
150   
151          num_rows = self.grid.getRowCount() 
152          self.grid.resize((num_rows+1), 3) 
153          self.grid.setHTML(num_rows, 0, description) 
154          self.grid.setWidget(num_rows, 1, widget) 
155   
156 -    def get(self, **kwargs): 
157          writebr(repr(kwargs)) 
158          self.svc({}, {'get': kwargs}, self.getter) 
159   
160 -    def save(self, data=None): 
161          self.clear_errors() 
162          if data is None: 
163              data = self.getValue() 
164          self.data = data 
165          writebr(repr(self.data)) 
166          self.svc(data, {'save': None}, self.saver) 
167   
168 -    def save_respond(self, response): 
169   
170          if not response['success']: 
171              errors = response['errors'] 
172              self.set_errors(errors) 
173              for l in self.describe_listeners: 
174                  l.onErrors(self, errors) 
175              return 
176   
177          for l in self.describe_listeners: 
178              l.onSaveDone(self, response) 
179   
180 -    def formsetup(self, data=None): 
181   
182          if data is None: 
183              data = {} 
184          self.data = data 
185          self.svc(data, {'describe': None}, self.describer) 
186   
187 -    def clear_errors(self): 
188   
189          for idx, fname in enumerate(self.fields): 
190              self.grid.setHTML(idx, 2, None) 
191   
192 -    def set_errors(self, errors): 
193   
194          offsets = {} 
195          for idx, fname in enumerate(self.fields): 
196              offsets[fname] = idx 
197          for k, err in errors.items(): 
198              err = "<br />".join(err) 
199              idx = offsets[k] 
200              self.grid.setHTML(idx, 2, err) 
201   
202 -    def update_values(self, data = None): 
203          if data is not None: 
204              self.data = data 
205   
206          for idx, fname in enumerate(self.fields): 
207              val = None 
208              if self.data.has_key(fname): 
209                  val = self.data[fname] 
210              w = self.grid.getWidget(idx, 1) 
211              w.setValue(val) 
212   
213 -    def do_get(self, response): 
214          fields = response.get('instance', None) 
215          if fields: 
216              self.update_values(fields) 
217          for l in self.describe_listeners: 
218              l.onRetrieveDone(self, fields) 
219   
220 -    def do_describe(self, fields): 
221   
222          self.fields = fields.keys() 
223          for idx, fname in enumerate(self.fields): 
224              field = fields[fname] 
225              if self.data and self.data.has_key(fname): 
226                  field['initial'] = self.data[fname] 
227              field_type = field['type'] 
228              widget_kls = widget_factory.get(field_type, CharField) 
229              fv = {} 
230              for (k, v) in field.items(): 
231                  fv[str(k)] = v 
232              w = widget_kls(**fv) 
233              self.add_widget(field['label'], w) 
234   
235          for l in self.describe_listeners: 
236              l.onDescribeDone(self) 
237   
238 -    def getValue(self): 
239   
240          res = {} 
241          for idx, fname in enumerate(self.fields): 
242              w = self.grid.getWidget(idx, 1) 
243              val = w.getValue() 
244              res[fname] = val 
245              self.data[fname] = val 
246   
247          return res 
248