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
 124
 125 class FileDropPanel(wxPanel):
 126     def __init__(self, parent, log):
 127         wxPanel.__init__(self, parent, -1)
 128
 129         #self.SetFont(wxFont(10, wxSWISS, wxNORMAL, wxBOLD, false))
 130
 131         sizer = wxBoxSizer(wxVERTICAL)
 132         sizer.Add(wxStaticText(self, -1, " \nDrag some files here:"),
 133                   0, wxEXPAND|wxALL, 2)
 134
 135         self.text = wxTextCtrl(self, -1, "",
 136                                style = wxTE_MULTILINE|wxHSCROLL|wxTE_READONLY)
 137         dt = MyFileDropTarget(self, log)
 138         self.text.SetDropTarget(dt)
 139         sizer.Add(self.text, 1, wxEXPAND)
 140
 141         sizer.Add(wxStaticText(self, -1, " \nDrag some text here:"),
 142                   0, wxEXPAND|wxALL, 2)
 143         self.text2 = wxTextCtrl(self, -1, "",
 144                                style = wxTE_MULTILINE|wxHSCROLL|wxTE_READONLY)
 145         dt = MyTextDropTarget(self.text2, log)
 146         self.text2.SetDropTarget(dt)
 147         sizer.Add(self.text2, 1, wxEXPAND)
 148
 149         self.SetAutoLayout(true)
 150         self.SetSizer(sizer)
 151
 152
 153     def WriteText(self, text):
 154         self.text.WriteText(text)
 155
 156     def SetInsertionPointEnd(self):
 157         self.text.SetInsertionPointEnd()
 158
 159
 160 #----------------------------------------------------------------------
 161 #----------------------------------------------------------------------
 162
 163 class TestPanel(wxPanel):
 164     def __init__(self, parent, log):
 165         wxPanel.__init__(self, parent, -1)
 166
 167         self.SetAutoLayout(true)
 168         outsideSizer = wxBoxSizer(wxVERTICAL)
 169
 170         msg = "Clipboard / Drag-And-Drop"
 171         text = wxStaticText(self, -1, "", style=wxALIGN_CENTRE)
 172         text.SetFont(wxFont(24, wxSWISS, wxNORMAL, wxBOLD, false))
 173         text.SetLabel(msg)
 174         w,h = text.GetTextExtent(msg)
 175         text.SetSize(wxSize(w,h+1))
 176         text.SetForegroundColour(wxBLUE)
 177         outsideSizer.Add(text, 0, wxEXPAND|wxALL, 5)
 178         outsideSizer.Add(wxStaticLine(self, -1), 0, wxEXPAND)
 179
 180         inSizer = wxBoxSizer(wxHORIZONTAL)
 181         inSizer.Add(ClipTextPanel(self, log), 1, wxEXPAND)
 182         inSizer.Add(FileDropPanel(self, log), 1, wxEXPAND)
 183
 184         outsideSizer.Add(inSizer, 1, wxEXPAND)
 185         self.SetSizer(outsideSizer)
 186
 187
 188 #----------------------------------------------------------------------
 189
 190 def runTest(frame, nb, log):
 191     win = TestPanel(nb, log)
 192     return win
 193
 194 #----------------------------------------------------------------------
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207 overview = """\
 208 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.
 209
 210 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.
 211
 212 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.
 213
 214 """