e7d0a4140b
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15812 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
347 lines
10 KiB
Python
347 lines
10 KiB
Python
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from wxPython.wx import *
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import cPickle
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#----------------------------------------------------------------------
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class DoodlePad(wxWindow):
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def __init__(self, parent, log):
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wxWindow.__init__(self, parent, -1, style=wxSUNKEN_BORDER)
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self.log = log
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self.SetBackgroundColour(wxWHITE)
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self.lines = []
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self.x = self.y = 0
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self.SetMode("Draw")
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EVT_LEFT_DOWN(self, self.OnLeftDown)
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EVT_LEFT_UP(self, self.OnLeftUp)
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EVT_RIGHT_UP(self, self.OnRightUp)
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EVT_MOTION(self, self.OnMotion)
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EVT_PAINT(self, self.OnPaint)
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def SetMode(self, mode):
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self.mode = mode
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if self.mode == "Draw":
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self.SetCursor(wxStockCursor(wxCURSOR_PENCIL))
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else:
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self.SetCursor(wxSTANDARD_CURSOR)
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def OnPaint(self, event):
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dc = wxPaintDC(self)
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self.DrawSavedLines(dc)
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def DrawSavedLines(self, dc):
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dc.BeginDrawing()
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dc.SetPen(wxPen(wxBLUE, 3))
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for line in self.lines:
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for coords in line:
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apply(dc.DrawLine, coords)
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dc.EndDrawing()
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def OnLeftDown(self, event):
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if self.mode == "Drag":
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self.StartDragOpperation()
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elif self.mode == "Draw":
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self.curLine = []
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self.x, self.y = event.GetPositionTuple()
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self.CaptureMouse()
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else:
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wxBell()
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self.log.write("unknown mode!\n")
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def OnLeftUp(self, event):
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self.lines.append(self.curLine)
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self.curLine = []
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self.ReleaseMouse()
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def OnRightUp(self, event):
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self.lines = []
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self.Refresh()
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def OnMotion(self, event):
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if event.Dragging() and not self.mode == "Drag":
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dc = wxClientDC(self)
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dc.BeginDrawing()
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dc.SetPen(wxPen(wxBLUE, 3))
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coords = (self.x, self.y) + event.GetPositionTuple()
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self.curLine.append(coords)
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apply(dc.DrawLine, coords)
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self.x, self.y = event.GetPositionTuple()
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dc.EndDrawing()
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def StartDragOpperation(self):
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# pickle the lines list
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linesdata = cPickle.dumps(self.lines, 1)
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# create our own data format and use it in a
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# custom data object
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ldata = wxCustomDataObject(wxCustomDataFormat("DoodleLines"))
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ldata.SetData(linesdata)
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# Also create a Bitmap version of the drawing
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size = self.GetSize()
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bmp = wxEmptyBitmap(size.width, size.height)
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dc = wxMemoryDC()
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dc.SelectObject(bmp)
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dc.SetBackground(wxWHITE_BRUSH)
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dc.Clear()
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self.DrawSavedLines(dc)
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dc.SelectObject(wxNullBitmap)
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# Now make a data object for the bitmap and also a composite
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# data object holding both of the others.
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bdata = wxBitmapDataObject(bmp)
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data = wxDataObjectComposite()
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data.Add(ldata)
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data.Add(bdata)
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# And finally, create the drop source and begin the drag
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# and drop opperation
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dropSource = wxDropSource(self)
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dropSource.SetData(data)
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self.log.WriteText("Begining DragDrop\n")
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result = dropSource.DoDragDrop(wxDrag_AllowMove)
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self.log.WriteText("DragDrop completed: %d\n" % result)
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if result == wxDragMove:
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self.lines = []
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self.Refresh()
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#----------------------------------------------------------------------
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class DoodleDropTarget(wxPyDropTarget):
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def __init__(self, window, log):
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wxPyDropTarget.__init__(self)
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self.log = log
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self.dv = window
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# specify the type of data we will accept
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self.data = wxCustomDataObject(wxCustomDataFormat("DoodleLines"))
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self.SetDataObject(self.data)
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# some virtual methods that track the progress of the drag
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def OnEnter(self, x, y, d):
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self.log.WriteText("OnEnter: %d, %d, %d\n" % (x, y, d))
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return d
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def OnLeave(self):
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self.log.WriteText("OnLeave\n")
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def OnDrop(self, x, y):
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self.log.WriteText("OnDrop: %d %d\n" % (x, y))
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return true
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def OnDragOver(self, x, y, d):
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#self.log.WriteText("OnDragOver: %d, %d, %d\n" % (x, y, d))
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# The value returned here tells the source what kind of visual
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# feedback to give. For example, if wxDragCopy is returned then
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# only the copy cursor will be shown, even if the source allows
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# moves. You can use the passed in (x,y) to determine what kind
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# of feedback to give. In this case we return the suggested value
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# which is based on whether the Ctrl key is pressed.
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return d
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# Called when OnDrop returns true. We need to get the data and
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# do something with it.
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def OnData(self, x, y, d):
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self.log.WriteText("OnData: %d, %d, %d\n" % (x, y, d))
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# copy the data from the drag source to our data object
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if self.GetData():
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# convert it back to a list of lines and give it to the viewer
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linesdata = self.data.GetData()
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lines = cPickle.loads(linesdata)
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self.dv.SetLines(lines)
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return d # what is returned signals the source what to do
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# with the original data (move, copy, etc.) In this
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# case we just return the suggested value given to us.
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class DoodleViewer(wxWindow):
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def __init__(self, parent, log):
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wxWindow.__init__(self, parent, -1, style=wxSUNKEN_BORDER)
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self.log = log
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self.SetBackgroundColour(wxWHITE)
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self.lines = []
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self.x = self.y = 0
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dt = DoodleDropTarget(self, log)
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self.SetDropTarget(dt)
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EVT_PAINT(self, self.OnPaint)
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def SetLines(self, lines):
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self.lines = lines
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self.Refresh()
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def OnPaint(self, event):
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dc = wxPaintDC(self)
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self.DrawSavedLines(dc)
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def DrawSavedLines(self, dc):
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dc.BeginDrawing()
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dc.SetPen(wxPen(wxRED, 3))
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for line in self.lines:
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for coords in line:
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apply(dc.DrawLine, coords)
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dc.EndDrawing()
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#----------------------------------------------------------------------
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class CustomDnDPanel(wxPanel):
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def __init__(self, parent, log):
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wxPanel.__init__(self, parent, -1)
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self.SetFont(wxFont(10, wxSWISS, wxNORMAL, wxBOLD, false))
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# Make the controls
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text1 = wxStaticText(self, -1,
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"Draw a little picture in this window\n"
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"then switch the mode below and drag the\n"
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"picture to the lower window or to another\n"
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"application that accepts BMP's as a drop\n"
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"target.\n"
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)
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rb1 = wxRadioButton(self, -1, "Draw", style=wxRB_GROUP)
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rb1.SetValue(true)
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rb2 = wxRadioButton(self, -1, "Drag")
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rb2.SetValue(false)
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text2 = wxStaticText(self, -1,
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"The lower window is accepting a\n"
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"custom data type that is a pickled\n"
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"Python list of lines data.")
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self.pad = DoodlePad(self, log)
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view = DoodleViewer(self, log)
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# put them in sizers
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sizer = wxBoxSizer(wxHORIZONTAL)
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box = wxBoxSizer(wxVERTICAL)
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rbox = wxBoxSizer(wxHORIZONTAL)
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rbox.Add(rb1)
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rbox.Add(rb2)
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box.Add(text1, 0, wxALL, 10)
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box.Add(rbox, 0, wxALIGN_CENTER)
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box.Add(10,90)
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box.Add(text2, 0, wxALL, 10)
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sizer.Add(box)
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dndsizer = wxBoxSizer(wxVERTICAL)
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dndsizer.Add(self.pad, 1, wxEXPAND|wxALL, 5)
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dndsizer.Add(view, 1, wxEXPAND|wxALL, 5)
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sizer.Add(dndsizer, 1, wxEXPAND)
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self.SetAutoLayout(true)
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self.SetSizer(sizer)
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# Events
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EVT_RADIOBUTTON(self, rb1.GetId(), self.OnRadioButton)
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EVT_RADIOBUTTON(self, rb2.GetId(), self.OnRadioButton)
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def OnRadioButton(self, evt):
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rb = self.FindWindowById(evt.GetId())
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self.pad.SetMode(rb.GetLabel())
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#----------------------------------------------------------------------
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#----------------------------------------------------------------------
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class TestPanel(wxPanel):
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def __init__(self, parent, log):
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wxPanel.__init__(self, parent, -1)
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self.SetAutoLayout(true)
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sizer = wxBoxSizer(wxVERTICAL)
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msg = "Custom Drag-And-Drop"
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text = wxStaticText(self, -1, "", style=wxALIGN_CENTRE)
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text.SetFont(wxFont(24, wxSWISS, wxNORMAL, wxBOLD, false))
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text.SetLabel(msg)
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w,h = text.GetTextExtent(msg)
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text.SetSize(wxSize(w,h+1))
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text.SetForegroundColour(wxBLUE)
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sizer.Add(text, 0, wxEXPAND|wxALL, 5)
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sizer.Add(wxStaticLine(self, -1), 0, wxEXPAND)
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sizer.Add(CustomDnDPanel(self, log), 1, wxEXPAND)
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self.SetSizer(sizer)
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#----------------------------------------------------------------------
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def runTest(frame, nb, log):
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#win = TestPanel(nb, log)
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win = CustomDnDPanel(nb, log)
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return win
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if __name__ == '__main__':
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import sys
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class DummyLog:
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def WriteText(self, text):
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sys.stdout.write(text)
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class TestApp(wxApp):
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def OnInit(self):
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self.MakeFrame()
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return true
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def MakeFrame(self, event=None):
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frame = wxFrame(None, -1, "Custom Drag and Drop", size=(550,400))
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menu = wxMenu()
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menu.Append(6543, "Window")
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mb = wxMenuBar()
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mb.Append(menu, "New")
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frame.SetMenuBar(mb)
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EVT_MENU(frame, 6543, self.MakeFrame)
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panel = TestPanel(frame, DummyLog())
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frame.Show(true)
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self.SetTopWindow(frame)
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app = TestApp(0)
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app.MainLoop()
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#----------------------------------------------------------------------
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overview = """\
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This demo shows Drag and Drop using a custom data type and a custom data object. A type called "DoodleLines" is created and a Python Pickle of a list is actually transfered in the drag and drop opperation.
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A second data object is also created containing a bitmap of the image and is made available to any drop target that accepts bitmaps, such as MS Word.
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The two data objects are combined in a wxDataObjectComposite and the rest is handled by the framework.
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"""
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