wxPython/demo/DragAndDrop.py

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