Source Code for Module teamwork.widgets.scale

  1  from teamwork.math.Interval import * 
  2   
  3  from Tkinter import * 
  4  import Pmw 
  5   
  6 -class IntervalScale(Pmw.MegaWidget): 
  7      """ Megawidget containing a scale, confidence and an indicator. 
  8      """ 
  9      confidenceValues = ['lo', 'med', 'hi'] 
 10       
 11 -    def __init__(self, parent = None, **kw): 
 12          # Define the megawidget options. 
 13          optiondefs = ( 
 14              ('color',       1,                None), 
 15              ('confidence',  1,                Pmw.INITOPT), 
 16              ('orient',      'vertical',       Pmw.INITOPT), 
 17              ('labelmargin', 0,                Pmw.INITOPT), 
 18              ('labelpos',    'w',             Pmw.INITOPT), 
 19              ('text',        '',               Pmw.INITOPT), 
 20              ('showvalue',   0,                self.showValue), 
 21              ('threshold',   (50,),            None), 
 22              ('value',       None,             None), 
 23          ) 
 24          self.defineoptions(kw, optiondefs) 
 25   
 26          # Initialise base class (after defining options). 
 27          Pmw.MegaWidget.__init__(self, parent) 
 28   
 29          # Create the components. 
 30          interior = self.interior() 
 31   
 32          # Create the indicator component. 
 33          # self.indicator = self.createcomponent('indicator', 
 34          #                                      (), None, 
 35          #                                     Frame, interior, 
 36          #                                      width = 16, 
 37          #                                      height = 16, 
 38          #                                      borderwidth = 2, 
 39          #                                      relief = 'raised') 
 40   
 41  ##        # Create the value component. 
 42  ##        self.value = self.createcomponent('value', (), None, 
 43  ##                                          Label, interior, width = 3) 
 44          self.group = self.createcomponent('Group', (), None, 
 45                                            Pmw.Group, interior, 
 46                                            tag_text=self['text'], 
 47                                            tag_font=('Helvetica',14,'bold')) 
 48          widget = self.group.component('tag') 
 49          self.activeFG = widget.cget('activeforeground') 
 50          self.disabledFG = widget.cget('disabledforeground') 
 51          # Create the scale component. 
 52          if self['orient'] == 'vertical': 
 53              # The default scale range seems to be 
 54              # the wrong way around - reverse it. 
 55              from_ = 100 
 56              to = 0 
 57          else: 
 58              from_ = 0 
 59              to = 100 
 60   
 61          # Draw scale widget 
 62          self.scale = self.createcomponent('scale', 
 63                                            (), None, Scale, 
 64                                            self.group.interior(), 
 65                                            orient = self['orient'], 
 66                                            # command = self.__doCommand, 
 67  ##                                          showvalue = 0, 
 68                                            length = 200, 
 69                                            from_ = from_, 
 70                                            to = to) 
 71   
 72   
 73          if self['orient'] == 'vertical': 
 74              self.scale.pack(side=LEFT,fill=Y,expand=YES) 
 75          else: 
 76              self.scale.pack(side=TOP,fill=X,expand=YES) 
 77   
 78          # Frame for any buttons 
 79          self.buttonFrame = Frame(self.group.interior()) 
 80          # Draw confidence widget, if applicable 
 81          if self['confidence']: 
 82              self.radio = self.createcomponent('radio',(),None, 
 83                                                Pmw.OptionMenu, 
 84                                                self.buttonFrame, 
 85                                                menubutton_width=3, 
 86                                                labelpos='w', 
 87                                                label_text='Confidence:', 
 88                                                items=self.confidenceValues 
 89                                                ) 
 90              self.radio.pack(side=LEFT,fill=Y,expand=YES) 
 91  ##            self.radio = self.createcomponent('radio', 
 92  ##                                              (), None, Pmw.RadioSelect, 
 93  ##                                              self.group.interior(), 
 94  ##                                              buttontype = 'radiobutton', 
 95  ##                                              labelpos = 'w', 
 96  ##                                              label_text = 'Confidence:', 
 97  ##                                              hull_borderwidth = 0, 
 98  ##                                              hull_relief = 'ridge', 
 99  ##                                              hull_width = 2, 
100  ##                                              frame_width = 2, 
101  ##                                              pady = 1, 
102  ##                                              padx = 1, 
103  ##                                              hull_height = 2, 
104  ##                                              frame_height = 2, 
105  ##                                              orient = self['orient'], 
106  ##                                              # command = self.__doCommand2, 
107  ##                                              ) 
108  ##            for text in self.confidenceValues: 
109  ##                self.radio.add(text) 
110  ##            if self['orient'] == 'vertical': 
111  ##                self.radio.pack(side=LEFT,fill=Y,expand=YES) 
112  ##            else: 
113  ##                self.radio.pack(side=TOP,fill=X,expand=YES) 
114          else: 
115              self.radio = None 
116          val = self['value'] 
117          self.setter(val) 
118          # Check keywords and initialise options. 
119          self.initialiseoptions() 
120          self.buttonFrame.pack() 
121          self.group.pack(side=TOP,fill=X,expand=YES) 
122   
123 -    def showValue(self): 
124          """Configures the value visibility on the scale""" 
125          self.scale.configure(showvalue=self['showvalue']) 
126           
127 -    def setter(self, val): 
128          if val is not None: 
129             conf = (val.hi - val.lo) / 2.0 
130             state = self.scale.cget('state') 
131             if state != NORMAL: 
132                 self.scale.configure(state=NORMAL) 
133             self.scale.set(val.mean()) 
134             self.scale.configure(state=state) 
135             if conf >= .4: 
136                 self.radio.invoke('lo') 
137             elif conf < .2: 
138                 self.radio.invoke('hi') 
139             else: 
140                 self.radio.invoke('med') 
141   
142 -    def get(self): 
143          mean = self.scale.get() 
144          confidence = self.radio.getcurselection() 
145          if confidence == 'lo': 
146              span = 0.4 
147          elif confidence == 'med': 
148              span = 0.2 
149          else: 
150              span = 0.0 
151          return Interval(mean-span,mean+span) 
152       
153 -    def __doCommand(self, valueStr): 
154          valueInt = self.scale.get() 
155          bottom = float(self['scale_from']) 
156          span = float(self['scale_to'])-bottom 
157          percent = (float(valueInt)-bottom)/span 
158          if self['color']: 
159              newColor = '#%02x%02x00' % \ 
160                         (int((1.0-percent)*255.),int(percent*255.)) 
161          else: 
162              value = int((1.0-percent)*255.) 
163              newColor = '#%02x%02x%02x' % (value,value,value) 
164          self.scale.configure(troughcolor=newColor) 
165  ##      self.value.configure(text = valueStr) 
166   
167 -    def setState(self,state=NORMAL): 
168          """Disables all editing widgets""" 
169          widget = self.group.component('tag') 
170          widget.configure(state=state) 
171          self.scale.configure(state=state) 
172          if state == NORMAL: 
173              self.scale.configure(fg=self.activeFG) 
174          else: 
175              self.scale.configure(fg=self.disabledFG) 
176          if self['confidence']: 
177              self.radio.component('menubutton').configure(state=state) 
178              if state == NORMAL: 
179                  self.radio.component('label').configure(fg=self.activeFG) 
180              else: 
181                  self.radio.component('label').configure(fg=self.disabledFG) 
182