wxPython/demo/IntCtrl.py

   1
   2 import  wx
   3 import  wx.lib.intctrl
   4
   5 #----------------------------------------------------------------------
   6
   7 class TestPanel( wx.Panel ):
   8     def __init__( self, parent, log ):
   9
  10         wx.Panel.__init__( self, parent, -1 )
  11         self.log = log
  12         panel = wx.Panel( self, -1 )
  13
  14         self.set_min = wx.CheckBox( panel, -1, "Set minimum value:" )
  15         self.min = wx.lib.intctrl.IntCtrl( panel, size=( 50, -1 ) )
  16         self.min.Enable( False )
  17
  18         self.set_max = wx.CheckBox( panel, -1, "Set maximum value:" )
  19         self.max = wx.lib.intctrl.IntCtrl( panel, size=( 50, -1 ) )
  20         self.max.Enable( False )
  21
  22         self.limit_target = wx.CheckBox( panel, -1, "Limit control" )
  23         self.allow_none = wx.CheckBox( panel, -1, "Allow empty control" )
  24         self.allow_long = wx.CheckBox( panel, -1, "Allow long integers" )
  25
  26         label = wx.StaticText( panel, -1, "Resulting integer control:" )
  27         self.target_ctl = wx.lib.intctrl.IntCtrl( panel )
  28
  29         grid = wx.FlexGridSizer( 0, 2, 0, 0 )
  30         grid.Add( self.set_min, 0, wx.ALIGN_LEFT|wx.ALIGN_CENTER_VERTICAL|wx.ALL, 5 )
  31         grid.Add( self.min, 0, wx.ALIGN_LEFT|wx.ALL, 5 )
  32
  33         grid.Add(self.set_max, 0, wx.ALIGN_LEFT|wx.ALIGN_CENTER_VERTICAL|wx.ALL, 5 )
  34         grid.Add( self.max, 0, wx.ALIGN_LEFT|wx.ALL, 5 )
  35
  36         grid.Add( self.limit_target, 0, wx.ALIGN_LEFT|wx.ALL, 5 )
  37         grid.Add( (20, 0), 0, wx.ALIGN_LEFT|wx.ALL, 5 )
  38         grid.Add( self.allow_none, 0, wx.ALIGN_LEFT|wx.ALL, 5 )
  39         grid.Add( (20, 0), 0, wx.ALIGN_LEFT|wx.ALL, 5 )
  40         grid.Add( self.allow_long, 0, wx.ALIGN_LEFT|wx.ALL, 5 )
  41         grid.Add( (20, 0), 0, wx.ALIGN_LEFT|wx.ALL, 5 )
  42
  43         grid.Add( (20, 0), 0, wx.ALIGN_LEFT|wx.ALL, 5 )
  44         grid.Add( (20, 0), 0, wx.ALIGN_LEFT|wx.ALL, 5 )
  45
  46         grid.Add( label, 0, wx.ALIGN_LEFT|wx.ALIGN_CENTER_VERTICAL|wx.ALL, 5 )
  47         grid.Add( self.target_ctl, 0, wx.ALIGN_LEFT|wx.ALL, 5 )
  48
  49         outer_box = wx.BoxSizer( wx.VERTICAL )
  50         outer_box.AddSizer( grid, 0, wx.ALIGN_CENTRE|wx.ALL, 20 )
  51
  52         panel.SetAutoLayout( True )
  53         panel.SetSizer( outer_box )
  54         outer_box.Fit( panel )
  55         panel.Move( (50,50) )
  56         self.panel = panel
  57
  58         self.Bind(wx.EVT_CHECKBOX, self.OnSetMin, self.set_min)
  59         self.Bind(wx.EVT_CHECKBOX, self.OnSetMax, self.set_max)
  60         self.Bind(wx.EVT_CHECKBOX, self.SetTargetMinMax, self.limit_target)
  61         self.Bind(wx.EVT_CHECKBOX, self.OnSetAllowNone, self.allow_none)
  62         self.Bind(wx.EVT_CHECKBOX, self.OnSetAllowLong, self.allow_long)
  63
  64         self.Bind(wx.lib.intctrl.EVT_INT, self.SetTargetMinMax, self.min)
  65         self.Bind(wx.lib.intctrl.EVT_INT, self.SetTargetMinMax, self.max)
  66         self.Bind(wx.lib.intctrl.EVT_INT, self.OnTargetChange, self.target_ctl)
  67
  68
  69     def OnSetMin( self, event ):
  70         self.min.Enable( self.set_min.GetValue() )
  71         self.SetTargetMinMax()
  72
  73     def OnSetMax( self, event ):
  74         self.max.Enable( self.set_max.GetValue() )
  75         self.SetTargetMinMax()
  76
  77
  78     def SetTargetMinMax( self, event=None ):
  79         min = max = None
  80         self.target_ctl.SetLimited( self.limit_target.GetValue() )
  81
  82         if self.set_min.GetValue():
  83             min = self.min.GetValue()
  84
  85         if self.set_max.GetValue():
  86             max = self.max.GetValue()
  87
  88         cur_min, cur_max = self.target_ctl.GetBounds()
  89
  90         if min != cur_min and not self.target_ctl.SetMin( min ):
  91             self.log.write( "min (%d) > current max (%d) -- bound not set\n" % ( min, self.target_ctl.GetMax() ) )
  92             self.min.SetForegroundColour( wx.RED )
  93         else:
  94             self.min.SetForegroundColour( wx.BLACK )
  95
  96         self.min.Refresh()
  97
  98         if max != cur_max and not self.target_ctl.SetMax( max ):
  99             self.log.write( "max (%d) < current min (%d) -- bound not set\n" % ( max, self.target_ctl.GetMin() ) )
 100             self.max.SetForegroundColour( wx.RED )
 101         else:
 102             self.max.SetForegroundColour( wx.BLACK )
 103
 104         self.max.Refresh()
 105
 106         if min != cur_min or max != cur_max:
 107             new_min, new_max = self.target_ctl.GetBounds()
 108             self.log.write( "current min, max:  (%s, %s)\n" % ( str(new_min), str(new_max) ) )
 109
 110
 111     def OnSetAllowNone( self, event ):
 112         self.target_ctl.SetNoneAllowed( self.allow_none.GetValue() )
 113
 114
 115     def OnSetAllowLong( self, event ):
 116         self.target_ctl.SetLongAllowed( self.allow_long.GetValue() )
 117
 118
 119     def OnTargetChange( self, event ):
 120         ctl = event.GetEventObject()
 121         value = ctl.GetValue()
 122         ib_str = [ "  (out of bounds)", "" ]
 123         self.log.write( "integer value = %s%s\n" % ( str(value), ib_str[ ctl.IsInBounds(value) ] ) )
 124
 125
 126 #----------------------------------------------------------------------
 127
 128 def runTest( frame, nb, log ):
 129     win = TestPanel( nb, log )
 130     return win
 131
 132 #----------------------------------------------------------------------
 133
 134 overview = """<html><body>
 135 <P>
 136 <B>IntCtrl</B> provides a control that takes and returns integers as
 137 value, and provides bounds support and optional value limiting.
 138 <P>
 139 <P>
 140 Here's the API for IntCtrl:
 141 <DL><PRE>
 142     <B>IntCtrl</B>(
 143          parent, id = -1,
 144          <B>value</B> = 0,
 145          <B>min</B> = None,
 146          <B>max</B> = None,
 147          <B>limited</B> = False,
 148          <B>allow_none</B> = False,
 149          <B>allow_long</B> = False,
 150          <B>default_color</B> = wxBLACK,
 151          <B>oob_color</B> = wxRED,
 152          pos = wxDefaultPosition,
 153          size = wxDefaultSize,
 154          style = 0,
 155          name = "integer")
 156 </PRE>
 157 <UL>
 158     <DT><B>value</B>
 159     <DD>If no initial value is set, the default will be zero, or
 160     the minimum value, if specified.  If an illegal string is specified,
 161     a ValueError will result. (You can always later set the initial
 162     value with SetValue() after instantiation of the control.)
 163     <BR>
 164     <DL><B>min</B>
 165     <DD>The minimum value that the control should allow.  This can be
 166     adjusted with SetMin().  If the control is not limited, any value
 167     below this bound will be colored with the current out-of-bounds color.
 168     <BR>
 169     <DT><B>max</B>
 170     <DD>The maximum value that the control should allow.  This can be
 171     adjusted with SetMax().  If the control is not limited, any value
 172     above this bound will be colored with the current out-of-bounds color.
 173     <BR>
 174     <DT><B>limited</B>
 175     <DD>Boolean indicating whether the control prevents values from
 176     exceeding the currently set minimum and maximum values (bounds).
 177     If <I>False</I> and bounds are set, out-of-bounds values will
 178     be colored with the current out-of-bounds color.
 179     <BR>
 180     <DT><B>allow_none</B>
 181     <DD>Boolean indicating whether or not the control is allowed to be
 182     empty, representing a value of <I>None</I> for the control.
 183     <BR>
 184     <DT><B>allow_long</B>
 185     <DD>Boolean indicating whether or not the control is allowed to hold
 186     and return a value of type long as well as int.  If False, the
 187     control will be implicitly limited to have a value such that
 188     -sys.maxint-1 &lt;= n &lt;= sys.maxint.
 189     <BR>
 190     <DT><B>default_color</B>
 191     <DD>Color value used for in-bounds values of the control.
 192     <BR>
 193     <DT><B>oob_color</B>
 194     <DD>Color value used for out-of-bounds values of the control
 195     when the bounds are set but the control is not limited.
 196 </UL>
 197 <BR>
 198 <BR>
 199 <DT><B>EVT_INT(win, id, func)</B>
 200 <DD>Respond to a wxEVT_COMMAND_INT_UPDATED event, generated when the
 201 value changes. Notice that this event will always be sent when the
 202 control's contents changes - whether this is due to user input or
 203 comes from the program itself (for example, if SetValue() is called.)
 204 <BR>
 205 <BR>
 206 <DT><B>SetValue(int)</B>
 207 <DD>Sets the value of the control to the integer value specified.
 208 The resulting actual value of the control may be altered to
 209 conform with the bounds set on the control if limited,
 210 or colored if not limited but the value is out-of-bounds.
 211 A ValueError exception will be raised if an invalid value
 212 is specified.
 213 <BR>
 214 <DT><B>GetValue()</B>
 215 <DD>Retrieves the integer value from the control.  The value
 216 retrieved will be sized as an int if possible or a long,
 217 if necessary.
 218 <BR>
 219 <BR>
 220 <DT><B>SetMin(min=None)</B>
 221 <DD>Sets the expected minimum value, or lower bound, of the control.
 222 (The lower bound will only be enforced if the control is
 223 configured to limit its values to the set bounds.)
 224 If a value of <I>None</I> is provided, then the control will have
 225 no explicit lower bound.  If the value specified is greater than
 226 the current lower bound, then the function returns 0 and the
 227 lower bound will not change from its current setting.  On success,
 228 the function returns 1.
 229 <DT><DD>If successful and the current value is
 230 lower than the new lower bound, if the control is limited, the
 231 value will be automatically adjusted to the new minimum value;
 232 if not limited, the value in the control will be colored with
 233 the current out-of-bounds color.
 234 <BR>
 235 <DT><B>GetMin()</B>
 236 <DD>Gets the current lower bound value for the control.
 237 It will return None if no lower bound is currently specified.
 238 <BR>
 239 <BR>
 240 <DT><B>SetMax(max=None)</B>
 241 <DD>Sets the expected maximum value, or upper bound, of the control.
 242 (The upper bound will only be enforced if the control is
 243 configured to limit its values to the set bounds.)
 244 If a value of <I>None</I> is provided, then the control will
 245 have no explicit upper bound.  If the value specified is less
 246 than the current lower bound, then the function returns 0 and
 247 the maximum will not change from its current setting. On success,
 248 the function returns 1.
 249 <DT><DD>If successful and the current value
 250 is greater than the new upper bound, if the control is limited
 251 the value will be automatically adjusted to the new maximum value;
 252 if not limited, the value in the control will be colored with the
 253 current out-of-bounds color.
 254 <BR>
 255 <DT><B>GetMax()</B>
 256 <DD>Gets the current upper bound value for the control.
 257 It will return None if no upper bound is currently specified.
 258 <BR>
 259 <BR>
 260 <DT><B>SetBounds(min=None,max=None)</B>
 261 <DD>This function is a convenience function for setting the min and max
 262 values at the same time.  The function only applies the maximum bound
 263 if setting the minimum bound is successful, and returns True
 264 only if both operations succeed.  <B><I>Note:</I></B> leaving out an argument
 265 will remove the corresponding bound.
 266 <DT><B>GetBounds()</B>
 267 <DD>This function returns a two-tuple (min,max), indicating the
 268 current bounds of the control.  Each value can be None if
 269 that bound is not set.
 270 <BR>
 271 <BR>
 272 <DT><B>IsInBounds(value=None)</B>
 273 <DD>Returns <I>True</I> if no value is specified and the current value
 274 of the control falls within the current bounds.  This function can also
 275 be called with a value to see if that value would fall within the current
 276 bounds of the given control.
 277 <BR>
 278 <BR>
 279 <DT><B>SetLimited(bool)</B>
 280 <DD>If called with a value of True, this function will cause the control
 281 to limit the value to fall within the bounds currently specified.
 282 If the control's value currently exceeds the bounds, it will then
 283 be limited accordingly.
 284 If called with a value of 0, this function will disable value
 285 limiting, but coloring of out-of-bounds values will still take
 286 place if bounds have been set for the control.
 287 <DT><B>IsLimited()</B>
 288 <DD>Returns <I>True</I> if the control is currently limiting the
 289 value to fall within the current bounds.
 290 <BR>
 291 <BR>
 292 <DT><B>SetNoneAllowed(bool)</B>
 293 <DD>If called with a value of True, this function will cause the control
 294 to allow the value to be empty, representing a value of None.
 295 If called with a value of false, this function will prevent the value
 296 from being None.  If the value of the control is currently None,
 297 ie. the control is empty, then the value will be changed to that
 298 of the lower bound of the control, or 0 if no lower bound is set.
 299 <DT><B>IsNoneAllowed()</B>
 300 <DD>Returns <I>True</I> if the control currently allows its
 301 value to be None.
 302 <BR>
 303 <BR>
 304 <DT><B>SetLongAllowed(bool)</B>
 305 <DD>If called with a value of True, this function will cause the
 306 control to allow the value to be a long. If called with a value
 307 of False, and the value of the control is currently a long value,
 308 the value of the control will be adjusted to fall within the
 309 size of an integer type, at either the sys.maxint or -sys.maxint-1,
 310 for positive and negative values, respectively.
 311 <DT><B>IsLongAllowed()</B>
 312 <DD>Returns <I>True</I> if the control currently allows its
 313 value to be of type long.
 314 <BR>
 315 <BR>
 316 <DT><B>SetColors(default_color=wxBLACK, oob_color=wxRED)</B>
 317 <DD>Tells the control what colors to use for normal and out-of-bounds
 318 values.  If the value currently exceeds the bounds, it will be
 319 recolored accordingly.
 320 <DT><B>GetColors()</B>
 321 <DD>Returns a tuple of <I>(default_color, oob_color)</I> indicating
 322 the current color settings for the control.
 323 <BR>
 324 <BR>
 325 <DT><B>Cut()</B>
 326 <DD>Will allow cuts to the clipboard of the text portion of the value,
 327 leaving the value of zero if the entire contents are "cut."
 328 <DT><B>Paste()</B>
 329 <DD>Will paste the contents of the clipboard to the selected portion
 330 of the value; if the resulting string does not represent a legal
 331 value, a ValueError will result.  If the result is out-of bounds,
 332 it will either be adjusted or colored as appropriate.
 333 </DL>
 334 </body></html>
 335 """
 336
 337
 338
 339 if __name__ == '__main__':
 340     import sys,os
 341     import run
 342     run.main(['', os.path.basename(sys.argv[0])])