wxPython/demo/DragAndDrop.py

   1
   2 from wxPython.wx import *
   3
   4 #----------------------------------------------------------------------
   5
   6 class ClipTextPanel(wxPanel):
   7     def __init__(self, parent, log):
   8         wxPanel.__init__(self, parent, -1)
   9         self.log = log
  10
  11         #self.SetFont(wxFont(10, wxSWISS, wxNORMAL, wxBOLD, False))
  12
  13         sizer = wxBoxSizer(wxVERTICAL)
  14         sizer.Add(wxStaticText(self, -1,
  15                                "Copy/Paste text to/from\n"
  16                                "this window and other apps"), 0, wxEXPAND|wxALL, 2)
  17
  18         self.text = wxTextCtrl(self, -1, "", style=wxTE_MULTILINE|wxHSCROLL)
  19         sizer.Add(self.text, 1, wxEXPAND)
  20
  21         hsz = wxBoxSizer(wxHORIZONTAL)
  22         hsz.Add(wxButton(self, 6050, " Copy "), 1, wxEXPAND|wxALL, 2)
  23         hsz.Add(wxButton(self, 6051, " Paste "), 1, wxEXPAND|wxALL, 2)
  24         sizer.Add(hsz, 0, wxEXPAND)
  25         sizer.Add(wxButton(self, 6052, " Copy Bitmap "), 0, wxEXPAND|wxALL, 2)
  26
  27         EVT_BUTTON(self, 6050, self.OnCopy)
  28         EVT_BUTTON(self, 6051, self.OnPaste)
  29         EVT_BUTTON(self, 6052, self.OnCopyBitmap)
  30
  31         self.SetAutoLayout(True)
  32         self.SetSizer(sizer)
  33
  34
  35     def OnCopy(self, evt):
  36         self.do = wxTextDataObject()
  37         self.do.SetText(self.text.GetValue())
  38         wxTheClipboard.Open()
  39         wxTheClipboard.SetData(self.do)
  40         wxTheClipboard.Close()
  41
  42
  43     def OnPaste(self, evt):
  44         do = wxTextDataObject()
  45         wxTheClipboard.Open()
  46         success = wxTheClipboard.GetData(do)
  47         wxTheClipboard.Close()
  48         if success:
  49             self.text.SetValue(do.GetText())
  50         else:
  51             wxMessageBox("There is no data in the clipboard in the required format",
  52                          "Error")
  53
  54     def OnCopyBitmap(self, evt):
  55         dlg = wxFileDialog(self, "Choose a bitmap to copy", wildcard="*.bmp")
  56         if dlg.ShowModal() == wxID_OK:
  57             bmp = wxBitmap(dlg.GetFilename(), wxBITMAP_TYPE_BMP)
  58             bmpdo = wxBitmapDataObject(bmp)
  59             wxTheClipboard.Open()
  60             wxTheClipboard.SetData(bmpdo)
  61             wxTheClipboard.Close()
  62
  63             wxMessageBox("The bitmap is now in the Clipboard.  Switch to a graphics\n"
  64                          "editor and try pasting it in...")
  65         dlg.Destroy()
  66
  67 #----------------------------------------------------------------------
  68
  69 class OtherDropTarget(wxPyDropTarget):
  70     def __init__(self, window, log):
  71         wxPyDropTarget.__init__(self)
  72         self.log = log
  73         self.do = wxFileDataObject()
  74         self.SetDataObject(self.do)
  75
  76     def OnEnter(self, x, y, d):
  77         self.log.WriteText("OnEnter: %d, %d, %d\n" % (x, y, d))
  78         return wxDragCopy
  79
  80     #def OnDragOver(self, x, y, d):
  81     #    self.log.WriteText("OnDragOver: %d, %d, %d\n" % (x, y, d))
  82     #    return wxDragCopy
  83
  84     def OnLeave(self):
  85         self.log.WriteText("OnLeave\n")
  86
  87     def OnDrop(self, x, y):
  88         self.log.WriteText("OnDrop: %d %d\n" % (x, y))
  89         return True
  90
  91     def OnData(self, x, y, d):
  92         self.log.WriteText("OnData: %d, %d, %d\n" % (x, y, d))
  93         self.GetData()
  94         self.log.WriteText("%s\n" % self.do.GetFilenames())
  95         return d
  96
  97
  98
  99
 100 class MyFileDropTarget(wxFileDropTarget):
 101     def __init__(self, window, log):
 102         wxFileDropTarget.__init__(self)
 103         self.window = window
 104         self.log = log
 105
 106     def OnDropFiles(self, x, y, filenames):
 107         self.window.SetInsertionPointEnd()
 108         self.window.WriteText("\n%d file(s) dropped at %d,%d:\n" %
 109                               (len(filenames), x, y))
 110         for file in filenames:
 111             self.window.WriteText(file + '\n')
 112
 113
 114 class MyTextDropTarget(wxTextDropTarget):
 115     def __init__(self, window, log):
 116         wxTextDropTarget.__init__(self)
 117         self.window = window
 118         self.log = log
 119
 120     def OnDropText(self, x, y, text):
 121         self.window.WriteText("(%d, %d)\n%s\n" % (x, y, text))
 122
 123     def OnDragOver(self, x, y, d):
 124         return wxDragCopy
 125
 126
 127 class FileDropPanel(wxPanel):
 128     def __init__(self, parent, log):
 129         wxPanel.__init__(self, parent, -1)
 130
 131         #self.SetFont(wxFont(10, wxSWISS, wxNORMAL, wxBOLD, False))
 132
 133         sizer = wxBoxSizer(wxVERTICAL)
 134         sizer.Add(wxStaticText(self, -1, " \nDrag some files here:"),
 135                   0, wxEXPAND|wxALL, 2)
 136
 137         self.text = wxTextCtrl(self, -1, "",
 138                                style = wxTE_MULTILINE|wxHSCROLL|wxTE_READONLY)
 139         dt = MyFileDropTarget(self, log)
 140         self.text.SetDropTarget(dt)
 141         sizer.Add(self.text, 1, wxEXPAND)
 142
 143         sizer.Add(wxStaticText(self, -1, " \nDrag some text here:"),
 144                   0, wxEXPAND|wxALL, 2)
 145         self.text2 = wxTextCtrl(self, -1, "",
 146                                style = wxTE_MULTILINE|wxHSCROLL|wxTE_READONLY)
 147         dt = MyTextDropTarget(self.text2, log)
 148         self.text2.SetDropTarget(dt)
 149         sizer.Add(self.text2, 1, wxEXPAND)
 150
 151         self.SetAutoLayout(True)
 152         self.SetSizer(sizer)
 153
 154
 155     def WriteText(self, text):
 156         self.text.WriteText(text)
 157
 158     def SetInsertionPointEnd(self):
 159         self.text.SetInsertionPointEnd()
 160
 161
 162 #----------------------------------------------------------------------
 163 #----------------------------------------------------------------------
 164
 165 class TestPanel(wxPanel):
 166     def __init__(self, parent, log):
 167         wxPanel.__init__(self, parent, -1)
 168
 169         self.SetAutoLayout(True)
 170         outsideSizer = wxBoxSizer(wxVERTICAL)
 171
 172         msg = "Clipboard / Drag-And-Drop"
 173         text = wxStaticText(self, -1, "", style=wxALIGN_CENTRE)
 174         text.SetFont(wxFont(24, wxSWISS, wxNORMAL, wxBOLD, False))
 175         text.SetLabel(msg)
 176         w,h = text.GetTextExtent(msg)
 177         text.SetSize(wxSize(w,h+1))
 178         text.SetForegroundColour(wxBLUE)
 179         outsideSizer.Add(text, 0, wxEXPAND|wxALL, 5)
 180         outsideSizer.Add(wxStaticLine(self, -1), 0, wxEXPAND)
 181
 182         inSizer = wxBoxSizer(wxHORIZONTAL)
 183         inSizer.Add(ClipTextPanel(self, log), 1, wxEXPAND)
 184         inSizer.Add(FileDropPanel(self, log), 1, wxEXPAND)
 185
 186         outsideSizer.Add(inSizer, 1, wxEXPAND)
 187         self.SetSizer(outsideSizer)
 188
 189
 190 #----------------------------------------------------------------------
 191
 192 def runTest(frame, nb, log):
 193     win = TestPanel(nb, log)
 194     return win
 195
 196 #----------------------------------------------------------------------
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209 overview = """\
 210 This demo shows some examples of data transfer through clipboard or drag and drop. In wxWindows, these two ways to transfer data (either between different applications or inside one and the same) are very similar which allows to implement both of them using almost the same code - or, in other words, if you implement drag and drop support for your application, you get clipboard support for free and vice versa.
 211
 212 At the heart of both clipboard and drag and drop operations lies the wxDataObject class. The objects of this class (or, to be precise, classes derived from it) represent the data which is being carried by the mouse during drag and drop operation or copied to or pasted from the clipboard. wxDataObject is a "smart" piece of data because it knows which formats it supports (see GetFormatCount and GetAllFormats) and knows how to render itself in any of them (see GetDataHere). It can also receive its value from the outside in a format it supports if it implements the SetData method. Please see the documentation of this class for more details.
 213
 214 Both clipboard and drag and drop operations have two sides: the source and target, the data provider and the data receiver. These which may be in the same application and even the same window when, for example, you drag some text from one position to another in a word processor. Let us describe what each of them should do.
 215
 216 """