wxPython/wx/lib/imagebrowser.py

   1 #----------------------------------------------------------------------------
   2 # Name:         BrowseImage.py
   3 # Purpose:      Display and Select Image Files
   4 #
   5 # Author:       Lorne White
   6 #
   7 # Version:      1.0
   8 # Date:         January 29, 2002
   9 # Licence:      wxWindows license
  10 #----------------------------------------------------------------------------
  11 # 1.0 Release
  12 # Create list of all available image file types
  13 # View "All Image" File Types as default filter
  14 # Sort the file list
  15 # Use newer "re" function for patterns
  16 #
  17 #----------------------------------------------------------------------------
  18 #
  19 # 12/08/2003 - Jeff Grimmett (grimmtooth@softhome.net)
  20 #
  21 # o Updated for wx namespace
  22 # o Corrected a nasty bug or two - see comments below.
  23 # o There was a duplicate ImageView.DrawImage() method. Que?
  24 #
  25
  26 #---------------------------------------------------------------------------
  27
  28 import  os
  29 import  sys
  30
  31 import  wx
  32
  33 dir_path = os.getcwd()
  34
  35 #---------------------------------------------------------------------------
  36
  37 def ConvertBMP(file_nm):
  38     if file_nm is None:
  39         return None
  40
  41     fl_fld = os.path.splitext(file_nm)
  42     ext = fl_fld[1]
  43     ext = ext[1:].lower()
  44
  45     image = wx.Image(file_nm, wx.BITMAP_TYPE_ANY)
  46     return image
  47
  48
  49 def GetSize(file_nm):       # for scaling image values
  50     image = ConvertBMP(file_nm)
  51     bmp = image.ConvertToBitmap()
  52     size = bmp.GetWidth(), bmp.GetHeight()
  53     return size
  54
  55
  56 class ImageView(wx.Window):
  57     def __init__(self, parent, id=-1, pos=wx.DefaultPosition, size=wx.DefaultSize):
  58         wx.Window.__init__(self, parent, id, pos, size)
  59         self.win = parent
  60         self.image = None
  61         self.back_color = 'WHITE'
  62         self.border_color = 'BLACK'
  63
  64         # Changed API of wx uses tuples for size and pos now.
  65         self.image_sizex = size[0]
  66         self.image_sizey = size[1]
  67         self.image_posx = pos[0]
  68         self.image_posy = pos[1]
  69         self.Bind(wx.EVT_PAINT, self.OnPaint)
  70
  71     def OnPaint(self, event):
  72         dc = wx.PaintDC(self)
  73         self.DrawImage(dc)
  74
  75
  76     def SetValue(self, file_nm):    # display the selected file in the panel
  77         image = ConvertBMP(file_nm)
  78         self.image = image
  79         self.Refresh()
  80
  81     def DrawBorder(self, dc):
  82         brush = wx.Brush(wx.NamedColour(self.back_color), wx.SOLID)
  83         dc.SetBrush(brush)
  84         dc.SetPen(wx.Pen(wx.NamedColour(self.border_color), 1))
  85         dc.DrawRectangle((0, 0), (self.image_sizex, self.image_sizey))
  86
  87     def DrawImage(self, dc):
  88         try:
  89             image = self.image
  90         except:
  91             return
  92
  93         self.DrawBorder(dc)
  94
  95         if image is None:
  96             return
  97
  98         bmp = image.ConvertToBitmap()
  99
 100         iwidth = bmp.GetWidth()   # dimensions of image file
 101         iheight = bmp.GetHeight()
 102
 103         diffx = (self.image_sizex - iwidth)/2   # center calc
 104         if iwidth >= self.image_sizex -10:      # if image width fits in window adjust
 105             diffx = 5
 106             iwidth = self.image_sizex - 10
 107
 108         diffy = (self.image_sizey - iheight)/2  # center calc
 109         if iheight >= self.image_sizey - 10:    # if image height fits in window adjust
 110             diffy = 5
 111             iheight = self.image_sizey - 10
 112
 113         image.Rescale(iwidth, iheight)      # rescale to fit the window
 114         image.ConvertToBitmap()
 115         bmp = image.ConvertToBitmap()
 116         dc.DrawBitmap(bmp, (diffx, diffy))        # draw the image to window
 117
 118
 119 class ImageDialog(wx.Dialog):
 120     def __init__(self, parent, set_dir = None):
 121         wx.Dialog.__init__(self, parent, -1, "Image Browser", wx.DefaultPosition, (400, 400))
 122
 123         self.x_pos = 30     # initial display positions
 124         self.y_pos = 20
 125         self.delta = 20
 126
 127         size = wx.Size(80, 25)
 128
 129         self.set_dir = os.getcwd()
 130         self.set_file = None
 131
 132         if set_dir != None:
 133             if os.path.exists(set_dir):     # set to working directory if nothing set
 134                 self.set_dir = set_dir
 135
 136         self.dir_x = self.x_pos
 137         self.dir_y = self.y_pos
 138         self.DisplayDir()       # display the directory value
 139
 140         self.y_pos = self.y_pos + self.delta
 141
 142         btn = wx.Button(self, -1, ' Set Directory ', (self.x_pos, self.y_pos), size).SetDefault()
 143         self.Bind(wx.EVT_BUTTON, self.SetDirect, btn)
 144
 145         self.type_posy = self.y_pos     # save the y position for the image type combo
 146
 147         self.fl_ext = '*.bmp'   # initial setting for file filtering
 148         self.GetFiles()     # get the file list
 149
 150         self.y_pos = self.y_pos + self.delta + 10
 151
 152         self.list_height = 150
 153
 154     # List of Labels
 155         self.tb = tb = wx.ListBox(self, -1, (self.x_pos, self.y_pos),
 156                                   (160, self.list_height), self.fl_list,
 157                                   wx.LB_SINGLE )
 158         self.Bind(wx.EVT_LISTBOX, self.OnListClick, tb)
 159         self.Bind(wx.EVT_LISTBOX_DCLICK, self.OnListDClick, tb)
 160
 161         width, height = self.tb.GetSize()
 162         image_posx = self.x_pos + width + 20       # positions for setting the image window
 163         image_posy = self.y_pos
 164         image_sizex = 150
 165         image_sizey = self.list_height
 166
 167         self.fl_types = [
 168                     "All Images", "Bmp", "Gif", "Png", "Jpg", "Ico", "Pnm",
 169                     "Pcx", "Tif", "All Files"
 170                     ]
 171
 172         self.fl_ext_types = {
 173                 "All Images": "All",
 174                 "Bmp": "*.bmp",
 175                 "Gif": "*.gif",
 176                 "Png": "*.png",
 177                 "Jpg": "*.jpg",
 178                 "Ico": "*.ico",
 179                 "Pnm": "*.pnm",
 180                 "Pcx": "*.pcx",
 181                 "Tif": "*.tif",
 182                 "All Files": "*.*"
 183                 }
 184
 185         self.set_type = self.fl_types[0]    # initial file filter setting
 186         self.fl_ext = self.fl_ext_types[self.set_type]
 187
 188         self.sel_type = wx.ComboBox(self, -1, self.set_type, (image_posx , self.type_posy),
 189                                     (150, -1), self.fl_types, wx.CB_DROPDOWN)
 190         self.Bind(wx.EVT_COMBOBOX, self.OnSetType, self.sel_type)
 191
 192         self.image_view = ImageView( self, pos=(image_posx, image_posy),
 193                                      size=(image_sizex, image_sizey))
 194
 195         self.y_pos = self.y_pos + height + 20
 196
 197         btn = wx.Button(self, -1, ' Select ', (100, self.y_pos), size).SetDefault()
 198         self.Bind(wx.EVT_BUTTON, self.OnOk, btn)
 199
 200         wx.Button(self, wx.ID_CANCEL, 'Cancel', (250, self.y_pos), size)
 201
 202         self.y_pos = self.y_pos + self.delta
 203         fsize = (400, self.y_pos + 50)    # resize dialog for final vertical position
 204         self.SetSize(fsize)
 205
 206         self.ResetFiles()
 207
 208     def GetFiles(self):     # get the file list using directory and extension values
 209         if self.fl_ext == "All":
 210             all_files = []
 211
 212             for ftypes in self.fl_types[1:-1]:    # get list of all available image types
 213                 filter = self.fl_ext_types[ftypes]
 214                 #print "filter = ", filter
 215                 self.fl_val = FindFiles(self, self.set_dir, filter)
 216                 all_files = all_files + self.fl_val.files   # add to list of files
 217
 218             self.fl_list = all_files
 219         else:
 220             self.fl_val = FindFiles(self, self.set_dir, self.fl_ext)
 221             self.fl_list = self.fl_val.files
 222
 223         self.fl_list.sort()     # sort the file list
 224
 225     def DisplayDir(self):       # display the working directory
 226         wx.StaticText(self, -1, self.set_dir, (self.dir_x, self.dir_y), (250, -1))
 227
 228     def OnSetType(self, event):
 229         val = event.GetString()      # get file type value
 230         self.fl_ext = self.fl_ext_types[val]
 231         self.ResetFiles()
 232
 233     def OnListDClick(self, event):
 234         self.OnOk(0)
 235
 236     def OnListClick(self, event):
 237         val = event.GetSelection()
 238         self.SetListValue(val)
 239
 240     def SetListValue(self, val):
 241         file_nm = self.fl_list[val]
 242         self.set_file = file_val = os.path.join(self.set_dir, file_nm)
 243         self.image_view.SetValue(file_val)
 244
 245     def SetDirect(self, event):     # set the new directory
 246         dlg = wx.DirDialog(self)
 247         dlg.SetPath(self.set_dir)
 248
 249         if dlg.ShowModal() == wx.ID_OK:
 250             self.set_dir = dlg.GetPath()
 251             self.ResetFiles()
 252
 253         dlg.Destroy()
 254
 255     def ResetFiles(self):   # refresh the display with files and initial image
 256         self.DisplayDir()
 257         self.GetFiles()
 258
 259         # Changed 12/8/03 jmg
 260         #
 261         # o Clear listbox first
 262         # o THEN check to see if there are any valid files of the selected
 263         #   type,
 264         # o THEN if we have any files to display, set the listbox up,
 265         #
 266         # OTHERWISE
 267         #
 268         # o Leave it cleared
 269         # o Clear the image viewer.
 270         #
 271         # This avoids a nasty assert error.
 272         #
 273         self.tb.Clear()
 274
 275         if len(self.fl_list):
 276             self.tb.Set(self.fl_list)
 277
 278             try:
 279                 self.tb.SetSelection(0)
 280                 self.SetListValue(0)
 281             except:
 282                 self.image_view.SetValue(None)
 283         else:
 284             self.image_view.SetValue(None)
 285
 286     def GetFile(self):
 287         return self.set_file
 288
 289     def GetDirectory(self):
 290         return self.set_dir
 291
 292     def OnCancel(self, event):
 293         self.result = None
 294         self.EndModal(wx.ID_CANCEL)
 295
 296     def OnOk(self, event):
 297         self.result = self.set_file
 298         self.EndModal(wx.ID_OK)
 299
 300
 301 def OnFileDlg(self):
 302     dlg = wx.FileDialog(self, "Choose an Image File", ".", "",
 303                         "Bmp (*.bmp)|*.bmp|JPEG (*.jpg)|*.jpg", wx.OPEN)
 304
 305     if dlg.ShowModal() == wx.ID_OK:
 306         path = dlg.GetPath()
 307     else:
 308         path = None
 309
 310     dlg.Destroy()
 311     return path
 312
 313 class FindFiles:
 314     def __init__(self, parent, dir, mask):
 315         filelist = []
 316         dirlist = [".."]
 317         self.dir = dir
 318         self.file = ""
 319         mask = mask.upper()
 320         pattern = self.MakeRegex(mask)
 321
 322         for i in os.listdir(dir):
 323             if i == "." or i == "..":
 324                 continue
 325
 326             path = os.path.join(dir, i)
 327             path = path.upper()
 328             value = i.upper()
 329
 330             if pattern.match(value) != None:
 331                 filelist.append(i)
 332
 333             self.files = filelist
 334
 335     def MakeRegex(self, pattern):
 336         import re
 337         f = ""  # Set up a regex for file names
 338
 339         for ch in pattern:
 340             if ch == "*":
 341                 f = f + ".*"
 342             elif ch == ".":
 343                 f = f + "\."
 344             elif ch == "?":
 345                 f = f + "."
 346             else:
 347                 f = f + ch
 348
 349         return re.compile(f+'$')
 350
 351     def StripExt(self, file_nm):
 352         fl_fld = os.path.splitext(file_nm)
 353         fl_name = fl_fld[0]
 354         ext = fl_fld[1]
 355         return ext[1:]