wxPython/demo/DragAndDrop.py

   1 # 11/5/2003 - Jeff Grimmett (grimmtooth@softhome.net)
   2 #
   3 # o Updated for wx namespace
   4 # o Got rid of all the hardcoded window IDs.
   5 # o Fixed a bug in class TestPanel() (empty sizer Add())
   6 #
   7 # 11/25/2003 - Jeff Grimmett (grimmtooth@softhome.net)
   8 #
   9 # o Fixed a bug in the BMP file dialog; was using GetFilename()
  10 #   instead of GetPath() to get the file to load.
  11 #
  12
  13 import  wx
  14
  15 #----------------------------------------------------------------------
  16
  17 ID_CopyBtn      = wx.NewId()
  18 ID_PasteBtn     = wx.NewId()
  19 ID_BitmapBtn    = wx.NewId()
  20
  21 #----------------------------------------------------------------------
  22
  23 class ClipTextPanel(wx.Panel):
  24     def __init__(self, parent, log):
  25         wx.Panel.__init__(self, parent, -1)
  26         self.log = log
  27
  28         #self.SetFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.BOLD, False))
  29
  30         sizer = wx.BoxSizer(wx.VERTICAL)
  31         sizer.Add(
  32             wx.StaticText(
  33                 self, -1, "Copy/Paste text to/from\n"
  34                 "this window and other apps"
  35                 ),
  36             0, wx.EXPAND|wx.ALL, 2
  37             )
  38
  39         self.text = wx.TextCtrl(self, -1, "", style=wx.TE_MULTILINE|wx.HSCROLL)
  40         sizer.Add(self.text, 1, wx.EXPAND)
  41
  42         hsz = wx.BoxSizer(wx.HORIZONTAL)
  43         hsz.Add(wx.Button(self, ID_CopyBtn, " Copy "), 1, wx.EXPAND|wx.ALL, 2)
  44         hsz.Add(wx.Button(self, ID_PasteBtn, " Paste "), 1, wx.EXPAND|wx.ALL, 2)
  45         sizer.Add(hsz, 0, wx.EXPAND)
  46         sizer.Add(
  47             wx.Button(self, ID_BitmapBtn, " Copy Bitmap "),
  48             0, wx.EXPAND|wx.ALL, 2
  49             )
  50
  51         self.Bind(wx.EVT_BUTTON, self.OnCopy, id=ID_CopyBtn)
  52         self.Bind(wx.EVT_BUTTON, self.OnPaste, id=ID_PasteBtn)
  53         self.Bind(wx.EVT_BUTTON, self.OnCopyBitmap, id=ID_BitmapBtn)
  54
  55         self.SetAutoLayout(True)
  56         self.SetSizer(sizer)
  57
  58
  59     def OnCopy(self, evt):
  60         self.do = wx.TextDataObject()
  61         self.do.SetText(self.text.GetValue())
  62         wx.TheClipboard.Open()
  63         wx.TheClipboard.SetData(self.do)
  64         wx.TheClipboard.Close()
  65
  66
  67     def OnPaste(self, evt):
  68         do = wx.TextDataObject()
  69         wx.TheClipboard.Open()
  70         success = wx.TheClipboard.GetData(do)
  71         wx.TheClipboard.Close()
  72
  73         if success:
  74             self.text.SetValue(do.GetText())
  75         else:
  76             wx.MessageBox(
  77                 "There is no data in the clipboard in the required format",
  78                 "Error"
  79                 )
  80
  81     def OnCopyBitmap(self, evt):
  82         dlg = wx.FileDialog(self, "Choose a bitmap to copy", wildcard="*.bmp")
  83
  84         if dlg.ShowModal() == wx.ID_OK:
  85             bmp = wx.Bitmap(dlg.GetPath(), wx.BITMAP_TYPE_BMP)
  86             bmpdo = wx.BitmapDataObject(bmp)
  87             wx.TheClipboard.Open()
  88             wx.TheClipboard.SetData(bmpdo)
  89             wx.TheClipboard.Close()
  90
  91             wx.MessageBox(
  92                 "The bitmap is now in the Clipboard.  Switch to a graphics\n"
  93                 "editor and try pasting it in..."
  94                 )
  95
  96         dlg.Destroy()
  97
  98 #----------------------------------------------------------------------
  99
 100 class OtherDropTarget(wx.PyDropTarget):
 101     def __init__(self, window, log):
 102         wx.PyDropTarget.__init__(self)
 103         self.log = log
 104         self.do = wx.FileDataObject()
 105         self.SetDataObject(self.do)
 106
 107     def OnEnter(self, x, y, d):
 108         self.log.WriteText("OnEnter: %d, %d, %d\n" % (x, y, d))
 109         return wx.DragCopy
 110
 111     #def OnDragOver(self, x, y, d):
 112     #    self.log.WriteText("OnDragOver: %d, %d, %d\n" % (x, y, d))
 113     #    return wx.DragCopy
 114
 115     def OnLeave(self):
 116         self.log.WriteText("OnLeave\n")
 117
 118     def OnDrop(self, x, y):
 119         self.log.WriteText("OnDrop: %d %d\n" % (x, y))
 120         return True
 121
 122     def OnData(self, x, y, d):
 123         self.log.WriteText("OnData: %d, %d, %d\n" % (x, y, d))
 124         self.GetData()
 125         self.log.WriteText("%s\n" % self.do.GetFilenames())
 126         return d
 127
 128
 129 class MyFileDropTarget(wx.FileDropTarget):
 130     def __init__(self, window, log):
 131         wx.FileDropTarget.__init__(self)
 132         self.window = window
 133         self.log = log
 134
 135     def OnDropFiles(self, x, y, filenames):
 136         self.window.SetInsertionPointEnd()
 137         self.window.WriteText("\n%d file(s) dropped at %d,%d:\n" %
 138                               (len(filenames), x, y))
 139
 140         for file in filenames:
 141             self.window.WriteText(file + '\n')
 142
 143
 144 class MyTextDropTarget(wx.TextDropTarget):
 145     def __init__(self, window, log):
 146         wx.TextDropTarget.__init__(self)
 147         self.window = window
 148         self.log = log
 149
 150     def OnDropText(self, x, y, text):
 151         self.window.WriteText("(%d, %d)\n%s\n" % (x, y, text))
 152
 153     def OnDragOver(self, x, y, d):
 154         return wx.DragCopy
 155
 156
 157 class FileDropPanel(wx.Panel):
 158     def __init__(self, parent, log):
 159         wx.Panel.__init__(self, parent, -1)
 160
 161         #self.SetFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.BOLD, False))
 162
 163         sizer = wx.BoxSizer(wx.VERTICAL)
 164         sizer.Add(
 165             wx.StaticText(self, -1, " \nDrag some files here:"),
 166             0, wx.EXPAND|wx.ALL, 2
 167             )
 168
 169         self.text = wx.TextCtrl(
 170                         self, -1, "",
 171                         style = wx.TE_MULTILINE|wx.HSCROLL|wx.TE_READONLY
 172                         )
 173
 174         dt = MyFileDropTarget(self, log)
 175         self.text.SetDropTarget(dt)
 176         sizer.Add(self.text, 1, wx.EXPAND)
 177
 178         sizer.Add(
 179             wx.StaticText(self, -1, " \nDrag some text here:"),
 180             0, wx.EXPAND|wx.ALL, 2
 181             )
 182
 183         self.text2 = wx.TextCtrl(
 184                         self, -1, "",
 185                         style = wx.TE_MULTILINE|wx.HSCROLL|wx.TE_READONLY
 186                         )
 187
 188         dt = MyTextDropTarget(self.text2, log)
 189         self.text2.SetDropTarget(dt)
 190         sizer.Add(self.text2, 1, wx.EXPAND)
 191
 192         self.SetAutoLayout(True)
 193         self.SetSizer(sizer)
 194
 195
 196     def WriteText(self, text):
 197         self.text.WriteText(text)
 198
 199     def SetInsertionPointEnd(self):
 200         self.text.SetInsertionPointEnd()
 201
 202
 203 #----------------------------------------------------------------------
 204 #----------------------------------------------------------------------
 205
 206 class TestPanel(wx.Panel):
 207     def __init__(self, parent, log):
 208         wx.Panel.__init__(self, parent, -1)
 209
 210         self.SetAutoLayout(True)
 211         outsideSizer = wx.BoxSizer(wx.VERTICAL)
 212
 213         msg = "Clipboard / Drag-And-Drop"
 214         text = wx.StaticText(self, -1, "", style=wx.ALIGN_CENTRE)
 215         text.SetFont(wx.Font(24, wx.SWISS, wx.NORMAL, wx.BOLD, False))
 216         text.SetLabel(msg)
 217
 218         w,h = text.GetTextExtent(msg)
 219         text.SetSize(wx.Size(w,h+1))
 220         text.SetForegroundColour(wx.BLUE)
 221         outsideSizer.Add(text, 0, wx.EXPAND|wx.ALL, 5)
 222         outsideSizer.Add(wx.StaticLine(self, -1), 0, wx.EXPAND)
 223
 224         inSizer = wx.BoxSizer(wx.HORIZONTAL)
 225         inSizer.Add(ClipTextPanel(self, log), 1, wx.EXPAND)
 226         inSizer.Add(FileDropPanel(self, log), 1, wx.EXPAND)
 227
 228         outsideSizer.Add(inSizer, 1, wx.EXPAND)
 229         self.SetSizer(outsideSizer)
 230
 231
 232 #----------------------------------------------------------------------
 233
 234 def runTest(frame, nb, log):
 235     win = TestPanel(nb, log)
 236     return win
 237
 238 #----------------------------------------------------------------------
 239
 240
 241 overview = """\
 242 <html>
 243 <body>
 244 This demo shows some examples of data transfer through clipboard or
 245 drag and drop. In wxWindows, these two ways to transfer data (either
 246 between different applications or inside one and the same) are very
 247 similar which allows to implement both of them using almost the same
 248 code - or, in other words, if you implement drag and drop support for
 249 your application, you get clipboard support for free and vice versa.
 250 <p>
 251 At the heart of both clipboard and drag and drop operations lies the
 252 wxDataObject class. The objects of this class (or, to be precise,
 253 classes derived from it) represent the data which is being carried by
 254 the mouse during drag and drop operation or copied to or pasted from
 255 the clipboard. wxDataObject is a "smart" piece of data because it
 256 knows which formats it supports (see GetFormatCount and GetAllFormats)
 257 and knows how to render itself in any of them (see GetDataHere). It
 258 can also receive its value from the outside in a format it supports if
 259 it implements the SetData method. Please see the documentation of this
 260 class for more details.
 261 <p>
 262 Both clipboard and drag and drop operations have two sides: the source
 263 and target, the data provider and the data receiver. These which may
 264 be in the same application and even the same window when, for example,
 265 you drag some text from one position to another in a word
 266 processor. Let us describe what each of them should do.
 267 </body>
 268 </html>
 269 """
 270
 271
 272 if __name__ == '__main__':
 273     import sys,os
 274     import run
 275     run.main(['', os.path.basename(sys.argv[0])])
 276