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