wxPython/wx/lib/filebrowsebutton.py

   1 #----------------------------------------------------------------------
   2 # Name:        wxPython.lib.filebrowsebutton
   3 # Purpose:     Composite controls that provide a Browse button next to
   4 #              either a wxTextCtrl or a wxComboBox.  The Browse button
   5 #              launches a wxFileDialog and loads the result into the
   6 #              other control.
   7 #
   8 # Author:      Mike Fletcher
   9 #
  10 # RCS-ID:      $Id$
  11 # Copyright:   (c) 2000 by Total Control Software
  12 # Licence:     wxWindows license
  13 #----------------------------------------------------------------------
  14 # 12/02/2003 - Jeff Grimmett (grimmtooth@softhome.net)
  15 #
  16 # o 2.5 Compatability changes
  17 #
  18
  19 import  os
  20 import  types
  21
  22 import  wx
  23
  24 #----------------------------------------------------------------------
  25
  26 class FileBrowseButton(wx.Panel):
  27     """
  28     A control to allow the user to type in a filename or browse with
  29     the standard file dialog to select file
  30     """
  31     def __init__ (self, parent, id= -1,
  32                   pos = wx.DefaultPosition,
  33                   size = wx.DefaultSize,
  34                   style = wx.TAB_TRAVERSAL,
  35                   labelText= "File Entry:",
  36                   buttonText= "Browse",
  37                   toolTip= "Type filename or click browse to choose file",
  38                   # following are the values for a file dialog box
  39                   dialogTitle = "Choose a file",
  40                   startDirectory = ".",
  41                   initialValue = "",
  42                   fileMask = "*.*",
  43                   fileMode = wx.OPEN,
  44                   # callback for when value changes (optional)
  45                   changeCallback= lambda x:x
  46         ):
  47         """
  48         :param labelText:      Text for label to left of text field
  49         :param buttonText:     Text for button which launches the file dialog
  50         :param toolTip:        Help text
  51         :param dialogTitle:    Title used in file dialog
  52         :param startDirectory: Default directory for file dialog startup
  53         :param fileMask:       File mask (glob pattern, such as *.*) to use in file dialog
  54         :param fileMode:       wx.OPEN or wx.SAVE, indicates type of file dialog to use
  55         :param changeCallback: Optional callback called for all changes in value of the control
  56         """
  57
  58         # store variables
  59         self.labelText = labelText
  60         self.buttonText = buttonText
  61         self.toolTip = toolTip
  62         self.dialogTitle = dialogTitle
  63         self.startDirectory = startDirectory
  64         self.initialValue = initialValue
  65         self.fileMask = fileMask
  66         self.fileMode = fileMode
  67         self.changeCallback = changeCallback
  68         self.callCallback = True
  69
  70
  71         # create the dialog
  72         self.createDialog(parent, id, pos, size, style )
  73         # Setting a value causes the changeCallback to be called.
  74         # In this case that would be before the return of the
  75         # constructor. Not good. So a default value on
  76         # SetValue is used to disable the callback
  77         self.SetValue( initialValue, 0)
  78
  79
  80     def createDialog( self, parent, id, pos, size, style ):
  81         """Setup the graphic representation of the dialog"""
  82         wx.Panel.__init__ (self, parent, id, pos, size, style)
  83         self.SetMinSize(size) # play nice with sizers
  84
  85         box = wx.BoxSizer(wx.HORIZONTAL)
  86
  87         self.label = self.createLabel( )
  88         box.Add( self.label, 0, wx.CENTER )
  89
  90         self.textControl = self.createTextControl()
  91         box.Add( self.textControl, 1, wx.LEFT|wx.CENTER, 5)
  92
  93         self.browseButton = self.createBrowseButton()
  94         box.Add( self.browseButton, 0, wx.LEFT|wx.CENTER, 5)
  95
  96         # add a border around the whole thing and resize the panel to fit
  97         outsidebox = wx.BoxSizer(wx.VERTICAL)
  98         outsidebox.Add(box, 1, wx.EXPAND|wx.ALL, 3)
  99         outsidebox.Fit(self)
 100
 101         self.SetAutoLayout(True)
 102         self.SetSizer( outsidebox )
 103         self.Layout()
 104         if type( size ) == types.TupleType:
 105             size = apply( wx.Size, size)
 106         self.SetDimensions(-1, -1, size.width, size.height, wx.SIZE_USE_EXISTING)
 107
 108 #        if size.width != -1 or size.height != -1:
 109 #            self.SetSize(size)
 110
 111     def SetBackgroundColour(self,color):
 112         wx.Panel.SetBackgroundColour(self,color)
 113         self.label.SetBackgroundColour(color)
 114
 115     def createLabel( self ):
 116         """Create the label/caption"""
 117         label = wx.StaticText(self, -1, self.labelText, style =wx.ALIGN_RIGHT )
 118         font = label.GetFont()
 119         w, h, d, e = self.GetFullTextExtent(self.labelText, font)
 120         label.SetSize((w+5, h))
 121         return label
 122
 123     def createTextControl( self):
 124         """Create the text control"""
 125         textControl = wx.TextCtrl(self, -1)
 126         textControl.SetToolTipString( self.toolTip )
 127         if self.changeCallback:
 128             textControl.Bind(wx.EVT_TEXT, self.OnChanged)
 129             textControl.Bind(wx.EVT_COMBOBOX, self.OnChanged)
 130         return textControl
 131
 132     def OnChanged(self, evt):
 133         if self.callCallback and self.changeCallback:
 134             self.changeCallback(evt)
 135
 136     def createBrowseButton( self):
 137         """Create the browse-button control"""
 138         button =wx.Button(self, -1, self.buttonText)
 139         button.SetToolTipString( self.toolTip )
 140         button.Bind(wx.EVT_BUTTON, self.OnBrowse)
 141         return button
 142
 143
 144     def OnBrowse (self, event = None):
 145         """ Going to browse for file... """
 146         current = self.GetValue()
 147         directory = os.path.split(current)
 148         if os.path.isdir( current):
 149             directory = current
 150             current = ''
 151         elif directory and os.path.isdir( directory[0] ):
 152             current = directory[1]
 153             directory = directory [0]
 154         else:
 155             directory = self.startDirectory
 156         dlg = wx.FileDialog(self, self.dialogTitle, directory, current,
 157                             self.fileMask, self.fileMode)
 158
 159         if dlg.ShowModal() == wx.ID_OK:
 160             self.SetValue(dlg.GetPath())
 161         dlg.Destroy()
 162
 163
 164     def GetValue (self):
 165         """
 166         retrieve current value of text control
 167         """
 168         return self.textControl.GetValue()
 169
 170     def SetValue (self, value, callBack=1):
 171         """set current value of text control"""
 172         save = self.callCallback
 173         self.callCallback = callBack
 174         self.textControl.SetValue(value)
 175         self.callCallback =  save
 176
 177
 178     def Enable (self, value):
 179         """ Convenient enabling/disabling of entire control """
 180         self.label.Enable (value)
 181         self.textControl.Enable (value)
 182         return self.browseButton.Enable (value)
 183
 184     def GetLabel( self ):
 185         """ Retrieve the label's current text """
 186         return self.label.GetLabel()
 187
 188     def SetLabel( self, value ):
 189         """ Set the label's current text """
 190         rvalue = self.label.SetLabel( value )
 191         self.Refresh( True )
 192         return rvalue
 193
 194
 195
 196
 197 class FileBrowseButtonWithHistory( FileBrowseButton ):
 198     """
 199     with following additions:
 200         __init__(..., history=None)
 201
 202             history -- optional list of paths for initial history drop-down
 203                 (must be passed by name, not a positional argument)
 204                 If history is callable it will must return a list used
 205                 for the history drop-down
 206
 207             changeCallback -- as for FileBrowseButton, but with a work-around
 208                 for win32 systems which don't appear to create wx.EVT_COMBOBOX
 209                 events properly.  There is a (slight) chance that this work-around
 210                 will cause some systems to create two events for each Combobox
 211                 selection. If you discover this condition, please report it!
 212
 213             As for a FileBrowseButton.__init__ otherwise.
 214
 215         GetHistoryControl()
 216             Return reference to the control which implements interfaces
 217             required for manipulating the history list.  See GetHistoryControl
 218             documentation for description of what that interface is.
 219
 220         GetHistory()
 221             Return current history list
 222
 223         SetHistory( value=(), selectionIndex = None )
 224             Set current history list, if selectionIndex is not None, select that index
 225
 226         """
 227     def __init__( self, *arguments, **namedarguments):
 228         self.history = namedarguments.get( "history" )
 229         if self.history:
 230             del namedarguments["history"]
 231
 232         self.historyCallBack=None
 233         if callable(self.history):
 234             self.historyCallBack=self.history
 235             self.history=None
 236         apply( FileBrowseButton.__init__, ( self,)+arguments, namedarguments)
 237
 238
 239     def createTextControl( self):
 240         """Create the text control"""
 241         textControl = wx.ComboBox(self, -1, style = wx.CB_DROPDOWN )
 242         textControl.SetToolTipString( self.toolTip )
 243         textControl.Bind(wx.EVT_SET_FOCUS, self.OnSetFocus)
 244         if self.changeCallback:
 245             textControl.Bind(wx.EVT_TEXT, self.OnChanged)
 246             textControl.Bind(wx.EVT_COMBOBOX, self.OnChanged)
 247         if self.history:
 248             history=self.history
 249             self.history=None
 250             self.SetHistory( history, control=textControl)
 251         return textControl
 252
 253
 254     def GetHistoryControl( self ):
 255         """
 256         Return a pointer to the control which provides (at least)
 257         the following methods for manipulating the history list:
 258
 259             Append( item ) -- add item
 260             Clear() -- clear all items
 261             Delete( index ) -- 0-based index to delete from list
 262             SetSelection( index ) -- 0-based index to select in list
 263
 264         Semantics of the methods follow those for the wxComboBox control
 265         """
 266         return self.textControl
 267
 268
 269     def SetHistory( self, value=(), selectionIndex = None, control=None ):
 270         """Set the current history list"""
 271         if control is None:
 272             control = self.GetHistoryControl()
 273         if self.history == value:
 274             return
 275         self.history = value
 276         # Clear history values not the selected one.
 277         tempValue=control.GetValue()
 278         # clear previous values
 279         control.Clear()
 280         control.SetValue(tempValue)
 281         # walk through, appending new values
 282         for path in value:
 283             control.Append( path )
 284         if selectionIndex is not None:
 285             control.SetSelection( selectionIndex )
 286
 287
 288     def GetHistory( self ):
 289         """Return the current history list"""
 290         if self.historyCallBack != None:
 291             return self.historyCallBack()
 292         elif self.history:
 293             return list( self.history )
 294         else:
 295             return []
 296
 297
 298     def OnSetFocus(self, event):
 299         """When the history scroll is selected, update the history"""
 300         if self.historyCallBack != None:
 301             self.SetHistory( self.historyCallBack(), control=self.textControl)
 302         event.Skip()
 303
 304
 305     if wx.Platform == "__WXMSW__":
 306         def SetValue (self, value, callBack=1):
 307             """ Convenient setting of text control value, works
 308                 around limitation of wx.ComboBox """
 309             save = self.callCallback
 310             self.callCallback = callBack
 311             self.textControl.SetValue(value)
 312             self.callCallback =  save
 313
 314             # Hack to call an event handler
 315             class LocalEvent:
 316                 def __init__(self, string):
 317                     self._string=string
 318                 def GetString(self):
 319                     return self._string
 320             if callBack==1:
 321                 # The callback wasn't being called when SetValue was used ??
 322                 # So added this explicit call to it
 323                 self.changeCallback(LocalEvent(value))
 324
 325
 326 class DirBrowseButton(FileBrowseButton):
 327     def __init__(self, parent, id = -1,
 328                  pos = wx.DefaultPosition, size = wx.DefaultSize,
 329                  style = wx.TAB_TRAVERSAL,
 330                  labelText = 'Select a directory:',
 331                  buttonText = 'Browse',
 332                  toolTip = 'Type directory name or browse to select',
 333                  dialogTitle = '',
 334                  startDirectory = '.',
 335                  changeCallback = None,
 336                  dialogClass = wx.DirDialog,
 337                  newDirectory = False):
 338         FileBrowseButton.__init__(self, parent, id, pos, size, style,
 339                                   labelText, buttonText, toolTip,
 340                                   dialogTitle, startDirectory,
 341                                   changeCallback = changeCallback)
 342         self.dialogClass = dialogClass
 343         self.newDirectory = newDirectory
 344     #
 345
 346     def OnBrowse(self, ev = None):
 347         style=0
 348
 349         if self.newDirectory:
 350           style|=wx.DD_NEW_DIR_BUTTON
 351
 352         dialog = self.dialogClass(self,
 353                                   message = self.dialogTitle,
 354                                   defaultPath = self.startDirectory,
 355                                   style = style)
 356
 357         if dialog.ShowModal() == wx.ID_OK:
 358             self.SetValue(dialog.GetPath())
 359         dialog.Destroy()
 360     #
 361
 362
 363 #----------------------------------------------------------------------
 364
 365
 366 if __name__ == "__main__":
 367     #from skeletonbuilder import rulesfile
 368     class SimpleCallback:
 369         def __init__( self, tag ):
 370             self.tag = tag
 371         def __call__( self, event ):
 372             print self.tag, event.GetString()
 373     class DemoFrame( wx.Frame ):
 374         def __init__(self, parent):
 375             wx.Frame.__init__(self, parent, -1, "File entry with browse", size=(500,260))
 376             self.Bind(wx.EVT_CLOSE, self.OnCloseWindow)
 377             panel = wx.Panel (self,-1)
 378             innerbox = wx.BoxSizer(wx.VERTICAL)
 379             control = FileBrowseButton(
 380                 panel,
 381                 initialValue = "z:\\temp",
 382             )
 383             innerbox.Add(  control, 0, wx.EXPAND )
 384             middlecontrol = FileBrowseButtonWithHistory(
 385                 panel,
 386                 labelText = "With History",
 387                 initialValue = "d:\\temp",
 388                 history = ["c:\\temp", "c:\\tmp", "r:\\temp","z:\\temp"],
 389                 changeCallback= SimpleCallback( "With History" ),
 390             )
 391             innerbox.Add( middlecontrol, 0, wx.EXPAND )
 392             middlecontrol = FileBrowseButtonWithHistory(
 393                 panel,
 394                 labelText = "History callback",
 395                 initialValue = "d:\\temp",
 396                 history = self.historyCallBack,
 397                 changeCallback= SimpleCallback( "History callback" ),
 398             )
 399             innerbox.Add( middlecontrol, 0, wx.EXPAND )
 400             self.bottomcontrol = control = FileBrowseButton(
 401                 panel,
 402                 labelText = "With Callback",
 403                 style = wx.SUNKEN_BORDER|wx.CLIP_CHILDREN ,
 404                 changeCallback= SimpleCallback( "With Callback" ),
 405             )
 406             innerbox.Add(  control, 0, wx.EXPAND)
 407             self.bottommostcontrol = control = DirBrowseButton(
 408                 panel,
 409                 labelText = "Simple dir browse button",
 410                 style = wx.SUNKEN_BORDER|wx.CLIP_CHILDREN)
 411             innerbox.Add(  control, 0, wx.EXPAND)
 412             ID = wx.NewId()
 413             innerbox.Add( wx.Button( panel, ID,"Change Label",  ), 1, wx.EXPAND)
 414             self.Bind(wx.EVT_BUTTON, self.OnChangeLabel , id=ID)
 415             ID = wx.NewId()
 416             innerbox.Add( wx.Button( panel, ID,"Change Value",  ), 1, wx.EXPAND)
 417             self.Bind(wx.EVT_BUTTON, self.OnChangeValue, id=ID )
 418             panel.SetAutoLayout(True)
 419             panel.SetSizer( innerbox )
 420             self.history={"c:\\temp":1, "c:\\tmp":1, "r:\\temp":1,"z:\\temp":1}
 421
 422         def historyCallBack(self):
 423             keys=self.history.keys()
 424             keys.sort()
 425             return keys
 426
 427         def OnFileNameChangedHistory (self, event):
 428             self.history[event.GetString ()]=1
 429
 430         def OnCloseMe(self, event):
 431             self.Close(True)
 432         def OnChangeLabel( self, event ):
 433             self.bottomcontrol.SetLabel( "Label Updated" )
 434         def OnChangeValue( self, event ):
 435             self.bottomcontrol.SetValue( "r:\\somewhere\\over\\the\\rainbow.htm" )
 436
 437         def OnCloseWindow(self, event):
 438             self.Destroy()
 439
 440     class DemoApp(wx.App):
 441         def OnInit(self):
 442             wx.InitAllImageHandlers()
 443             frame = DemoFrame(None)
 444             frame.Show(True)
 445             self.SetTopWindow(frame)
 446             return True
 447
 448     def test( ):
 449         app = DemoApp(0)
 450         app.MainLoop()
 451     print 'Creating dialog'
 452     test( )
 453
 454
 455