[wxWidgets.git] / utils / wxPython / demo / CustomDragAndDrop.py


from wxPython.wx import *

import cPickle

#----------------------------------------------------------------------


class DoodlePad(wxWindow):
    def __init__(self, parent, log):
        wxWindow.__init__(self, parent, -1, style=wxSUNKEN_BORDER)
        self.log = log
        self.SetBackgroundColour(wxWHITE)
        self.lines = []
        self.x = self.y = 0
        self.SetCursor(wxStockCursor(wxCURSOR_PENCIL))

        EVT_LEFT_DOWN(self, self.OnLeftDown)
        EVT_LEFT_UP(self, self.OnLeftUp)
        EVT_RIGHT_UP(self, self.OnRightUp)
        EVT_MOTION(self, self.OnMotion)


    def OnPaint(self, event):
        dc = wxPaintDC(self)
        self.DrawSavedLines(dc)

    def DrawSavedLines(self, dc):
        dc.BeginDrawing()
        dc.SetPen(wxPen(wxBLUE, 3))
        for line in self.lines:
            for coords in line:
                apply(dc.DrawLine, coords)
        dc.EndDrawing()


    def OnLeftDown(self, event):
        if event.ControlDown():
            self.StartDragOpperation()
        else:
            self.curLine = []
            self.x, self.y = event.GetPositionTuple()
            self.CaptureMouse()


    def OnLeftUp(self, event):
        self.lines.append(self.curLine)
        self.curLine = []
        self.ReleaseMouse()

    def OnRightUp(self, event):
        self.lines = []
        self.Refresh()

    def OnMotion(self, event):
        if event.Dragging() and not event.ControlDown():
            dc = wxClientDC(self)
            dc.BeginDrawing()
            dc.SetPen(wxPen(wxBLUE, 3))
            coords = (self.x, self.y) + event.GetPositionTuple()
            self.curLine.append(coords)
            apply(dc.DrawLine, coords)
            self.x, self.y = event.GetPositionTuple()
            dc.EndDrawing()


    def StartDragOpperation(self):
        # pickle the lines list
        linesdata = cPickle.dumps(self.lines, 1)

        # create our own data format and use it in a
        # custom data object
        ldata = wxCustomDataObject(wxCustomDataFormat("DoodleLines"))
        ldata.SetData(linesdata)

        # Also create a Bitmap version of the drawing
        size = self.GetSize()
        bmp = wxEmptyBitmap(size.width, size.height)
        dc = wxMemoryDC()
        dc.SelectObject(bmp)
        dc.SetBackground(wxWHITE_BRUSH)
        dc.Clear()
        self.DrawSavedLines(dc)
        dc.SelectObject(wxNullBitmap)

        # Now make a data object for the bitmap and also a composite
        # data object holding both of the others.
        bdata = wxBitmapDataObject(bmp)
        data = wxDataObjectComposite()
        data.Add(ldata)
        data.Add(bdata)

        # And finally, create the drop source and begin the drag
        # and drop opperation
        dropSource = wxDropSource(self)
        dropSource.SetData(data)
        self.log.WriteText("Begining DragDrop\n")
        result = dropSource.DoDragDrop()
        self.log.WriteText("DragDrop completed: %d\n" % result)

#----------------------------------------------------------------------


class DoodleDropTarget(wxPyDropTarget):
    def __init__(self, window, log):
        wxPyDropTarget.__init__(self)
        self.log = log
        self.dv = window
        self.data = wxCustomDataObject(wxCustomDataFormat("DoodleLines"))
        self.SetDataObject(self.data)

    def OnEnter(self, x, y, d):
        self.log.WriteText("OnEnter: %d, %d, %d\n" % (x, y, d))
        return wxDragCopy

    def OnLeave(self):
        self.log.WriteText("OnLeave\n")

    def OnDrop(self, x, y):
        self.log.WriteText("OnDrop: %d %d\n" % (x, y))
        return true

    def OnData(self, x, y, d):
        self.log.WriteText("OnData: %d, %d, %d\n" % (x, y, d))
        if self.GetData():
            linesdata = self.data.GetData()
            lines = cPickle.loads(linesdata)
            self.dv.SetLines(lines)
        return d

    #def OnDragOver(self, x, y, d):
    #    self.log.WriteText("OnDragOver: %d, %d, %d\n" % (x, y, d))
    #    return wxDragCopy


class DoodleViewer(wxWindow):
    def __init__(self, parent, log):
        wxWindow.__init__(self, parent, -1, style=wxSUNKEN_BORDER)
        self.log = log
        self.SetBackgroundColour(wxWHITE)
        self.lines = []
        self.x = self.y = 0
        dt = DoodleDropTarget(self, log)
        self.SetDropTarget(dt)

    def SetLines(self, lines):
        self.lines = lines
        self.Refresh()

    def OnPaint(self, event):
        dc = wxPaintDC(self)
        self.DrawSavedLines(dc)

    def DrawSavedLines(self, dc):
        dc.BeginDrawing()
        dc.SetPen(wxPen(wxRED, 3))
        for line in self.lines:
            for coords in line:
                apply(dc.DrawLine, coords)
        dc.EndDrawing()

#----------------------------------------------------------------------

class CustomDnDPanel(wxPanel):
    def __init__(self, parent, log):
        wxPanel.__init__(self, parent, -1)

        self.SetFont(wxFont(10, wxSWISS, wxNORMAL, wxBOLD, false))

        sizer = wxBoxSizer(wxHORIZONTAL)
        text = wxStaticText(self, -1,
                            "Draw a little picture in this window\n"
                            "then Ctrl-Drag it to the lower \n"
                            "window or to another application\n"
                            "that accepts BMP's as a drop target.\n\n"
                            "The lower window is accepting a\n"
                            "custom data type that is a pickled\n"
                            "Python list of lines data.")
        sizer.Add(text, 1, wxALL, 10)

        insizer = wxBoxSizer(wxVERTICAL)
        insizer.Add(DoodlePad(self, log), 1, wxEXPAND|wxALL, 5)
        insizer.Add(DoodleViewer(self, log), 1, wxEXPAND|wxALL, 5)

        sizer.Add(insizer, 1, wxEXPAND)
        self.SetAutoLayout(true)
        self.SetSizer(sizer)


#----------------------------------------------------------------------
#----------------------------------------------------------------------

class TestPanel(wxPanel):
    def __init__(self, parent, log):
        wxPanel.__init__(self, parent, -1)

        self.SetAutoLayout(true)
        sizer = wxBoxSizer(wxVERTICAL)

        msg = "Custom Drag-And-Drop"
        text = wxStaticText(self, -1, "", style=wxALIGN_CENTRE)
        text.SetFont(wxFont(24, wxSWISS, wxNORMAL, wxBOLD, false))
        text.SetLabel(msg)
        w,h = text.GetTextExtent(msg)
        text.SetSize(wxSize(w,h+1))
        text.SetForegroundColour(wxBLUE)
        sizer.Add(text, 0, wxEXPAND|wxALL, 5)
        sizer.Add(wxStaticLine(self, -1), 0, wxEXPAND)

        sizer.Add(CustomDnDPanel(self, log), 1, wxEXPAND)

        self.SetSizer(sizer)


#----------------------------------------------------------------------

def runTest(frame, nb, log):
    win = TestPanel(nb, log)
    return win


if __name__ == '__main__':
    import sys
    class DummyLog:
        def WriteText(self, text):
            sys.stdout.write(text)

    class TestApp(wxApp):
        def OnInit(self):
            self.MakeFrame()
            return true

        def MakeFrame(self, event=None):
            frame = wxFrame(None, -1, "Custom Drag and Drop", size=(550,400))
            menu = wxMenu()
            menu.Append(6543, "Window")
            mb = wxMenuBar()
            mb.Append(menu, "New")
            frame.SetMenuBar(mb)
            EVT_MENU(frame, 6543, self.MakeFrame)
            panel = TestPanel(frame, DummyLog())
            frame.Show(true)
            self.SetTopWindow(frame)


    app = TestApp(0)
    app.MainLoop()

#----------------------------------------------------------------------


overview = """\
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.

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.

The two data objects are combined in a wxDataObjectComposite and the rest is handled by the framework.
"""
Commit	Line	Data
b1462dfa RD	1
	2	from wxPython.wx import *
	3
	4	import cPickle
	5
	6	#----------------------------------------------------------------------
	7
	8
	9	class DoodlePad(wxWindow):
	10	def __init__(self, parent, log):
	11	wxWindow.__init__(self, parent, -1, style=wxSUNKEN_BORDER)
	12	self.log = log
	13	self.SetBackgroundColour(wxWHITE)
	14	self.lines = []
	15	self.x = self.y = 0
	16	self.SetCursor(wxStockCursor(wxCURSOR_PENCIL))
	17
	18	EVT_LEFT_DOWN(self, self.OnLeftDown)
	19	EVT_LEFT_UP(self, self.OnLeftUp)
	20	EVT_RIGHT_UP(self, self.OnRightUp)
	21	EVT_MOTION(self, self.OnMotion)
	22
	23
	24	def OnPaint(self, event):
	25	dc = wxPaintDC(self)
	26	self.DrawSavedLines(dc)
	27
	28	def DrawSavedLines(self, dc):
	29	dc.BeginDrawing()
	30	dc.SetPen(wxPen(wxBLUE, 3))
	31	for line in self.lines:
	32	for coords in line:
	33	apply(dc.DrawLine, coords)
	34	dc.EndDrawing()
	35
	36
	37	def OnLeftDown(self, event):
	38	if event.ControlDown():
	39	self.StartDragOpperation()
	40	else:
	41	self.curLine = []
	42	self.x, self.y = event.GetPositionTuple()
	43	self.CaptureMouse()
	44
	45
	46	def OnLeftUp(self, event):
	47	self.lines.append(self.curLine)
	48	self.curLine = []
	49	self.ReleaseMouse()
	50
	51	def OnRightUp(self, event):
	52	self.lines = []
	53	self.Refresh()
	54
	55	def OnMotion(self, event):
	56	if event.Dragging() and not event.ControlDown():
	57	dc = wxClientDC(self)
	58	dc.BeginDrawing()
	59	dc.SetPen(wxPen(wxBLUE, 3))
	60	coords = (self.x, self.y) + event.GetPositionTuple()
	61	self.curLine.append(coords)
	62	apply(dc.DrawLine, coords)
	63	self.x, self.y = event.GetPositionTuple()
	64	dc.EndDrawing()
65
66
67	def StartDragOpperation(self):
68	# pickle the lines list
69	linesdata = cPickle.dumps(self.lines, 1)
70
71	# create our own data format and use it in a
72	# custom data object
73	ldata = wxCustomDataObject(wxCustomDataFormat("DoodleLines"))
74	ldata.SetData(linesdata)
75
76	# Also create a Bitmap version of the drawing
77	size = self.GetSize()
78	bmp = wxEmptyBitmap(size.width, size.height)
79	dc = wxMemoryDC()
80	dc.SelectObject(bmp)
81	dc.SetBackground(wxWHITE_BRUSH)
82	dc.Clear()
83	self.DrawSavedLines(dc)
84	dc.SelectObject(wxNullBitmap)
85
86	# Now make a data object for the bitmap and also a composite
87	# data object holding both of the others.
88	bdata = wxBitmapDataObject(bmp)
89	data = wxDataObjectComposite()
90	data.Add(ldata)
91	data.Add(bdata)
92
93	# And finally, create the drop source and begin the drag
94	# and drop opperation
95	dropSource = wxDropSource(self)
96	dropSource.SetData(data)
97	self.log.WriteText("Begining DragDrop\n")
98	result = dropSource.DoDragDrop()
99	self.log.WriteText("DragDrop completed: %d\n" % result)
100
101	#----------------------------------------------------------------------
102
103
104	class DoodleDropTarget(wxPyDropTarget):
105	def __init__(self, window, log):
106	wxPyDropTarget.__init__(self)
107	self.log = log
108	self.dv = window
109	self.data = wxCustomDataObject(wxCustomDataFormat("DoodleLines"))
110	self.SetDataObject(self.data)
111
112	def OnEnter(self, x, y, d):
113	self.log.WriteText("OnEnter: %d, %d, %d\n" % (x, y, d))
114	return wxDragCopy
115
116	def OnLeave(self):
117	self.log.WriteText("OnLeave\n")
118
119	def OnDrop(self, x, y):
120	self.log.WriteText("OnDrop: %d %d\n" % (x, y))
121	return true
122
123	def OnData(self, x, y, d):
124	self.log.WriteText("OnData: %d, %d, %d\n" % (x, y, d))
125	if self.GetData():
126	linesdata = self.data.GetData()
127	lines = cPickle.loads(linesdata)
128	self.dv.SetLines(lines)
129	return d
130
131	#def OnDragOver(self, x, y, d):
132	# self.log.WriteText("OnDragOver: %d, %d, %d\n" % (x, y, d))
133	# return wxDragCopy
134
135
136
137	class DoodleViewer(wxWindow):
138	def __init__(self, parent, log):
139	wxWindow.__init__(self, parent, -1, style=wxSUNKEN_BORDER)
140	self.log = log
141	self.SetBackgroundColour(wxWHITE)
142	self.lines = []
143	self.x = self.y = 0
144	dt = DoodleDropTarget(self, log)
145	self.SetDropTarget(dt)
146
147	def SetLines(self, lines):
148	self.lines = lines
149	self.Refresh()
150
151	def OnPaint(self, event):
152	dc = wxPaintDC(self)
153	self.DrawSavedLines(dc)
154
155	def DrawSavedLines(self, dc):
156	dc.BeginDrawing()
157	dc.SetPen(wxPen(wxRED, 3))
158	for line in self.lines:
159	for coords in line:
160	apply(dc.DrawLine, coords)
161	dc.EndDrawing()
162
163	#----------------------------------------------------------------------
164
165	class CustomDnDPanel(wxPanel):
166	def __init__(self, parent, log):
167	wxPanel.__init__(self, parent, -1)
168
169	self.SetFont(wxFont(10, wxSWISS, wxNORMAL, wxBOLD, false))
170
171	sizer = wxBoxSizer(wxHORIZONTAL)
899493dd RD	172	text = wxStaticText(self, -1,
	173	"Draw a little picture in this window\n"
	174	"then Ctrl-Drag it to the lower \n"
	175	"window or to another application\n"
	176	"that accepts BMP's as a drop target.\n\n"
	177	"The lower window is accepting a\n"
	178	"custom data type that is a pickled\n"
	179	"Python list of lines data.")
	180	sizer.Add(text, 1, wxALL, 10)
b1462dfa RD	181
	182	insizer = wxBoxSizer(wxVERTICAL)
	183	insizer.Add(DoodlePad(self, log), 1, wxEXPAND\|wxALL, 5)
	184	insizer.Add(DoodleViewer(self, log), 1, wxEXPAND\|wxALL, 5)
	185
	186	sizer.Add(insizer, 1, wxEXPAND)
	187	self.SetAutoLayout(true)
	188	self.SetSizer(sizer)
	189
	190
	191
	192
	193	#----------------------------------------------------------------------
	194	#----------------------------------------------------------------------
	195
	196	class TestPanel(wxPanel):
	197	def __init__(self, parent, log):
	198	wxPanel.__init__(self, parent, -1)
	199
	200	self.SetAutoLayout(true)
	201	sizer = wxBoxSizer(wxVERTICAL)
	202
4120ef2b	203	msg = "Custom Drag-And-Drop"
b1462dfa RD	204	text = wxStaticText(self, -1, "", style=wxALIGN_CENTRE)
b1462dfa RD	205	text.SetFont(wxFont(24, wxSWISS, wxNORMAL, wxBOLD, false))
4120ef2b RD	206	text.SetLabel(msg)
	207	w,h = text.GetTextExtent(msg)
	208	text.SetSize(wxSize(w,h+1))
b1462dfa RD	209	text.SetForegroundColour(wxBLUE)
	210	sizer.Add(text, 0, wxEXPAND\|wxALL, 5)
	211	sizer.Add(wxStaticLine(self, -1), 0, wxEXPAND)
	212
	213	sizer.Add(CustomDnDPanel(self, log), 1, wxEXPAND)
	214
	215	self.SetSizer(sizer)
	216
	217
	218	#----------------------------------------------------------------------
	219
	220	def runTest(frame, nb, log):
	221	win = TestPanel(nb, log)
	222	return win
	223
899493dd RD	224
	225	if __name__ == '__main__':
	226	import sys
	227	class DummyLog:
	228	def WriteText(self, text):
	229	sys.stdout.write(text)
	230
	231	class TestApp(wxApp):
	232	def OnInit(self):
	233	self.MakeFrame()
	234	return true
	235
	236	def MakeFrame(self, event=None):
	237	frame = wxFrame(None, -1, "Custom Drag and Drop", size=(550,400))
	238	menu = wxMenu()
	239	menu.Append(6543, "Window")
	240	mb = wxMenuBar()
	241	mb.Append(menu, "New")
	242	frame.SetMenuBar(mb)
	243	EVT_MENU(frame, 6543, self.MakeFrame)
	244	panel = TestPanel(frame, DummyLog())
	245	frame.Show(true)
	246	self.SetTopWindow(frame)
	247
	248
	249
	250	app = TestApp(0)
	251	app.MainLoop()
	252
b1462dfa RD	253	#----------------------------------------------------------------------
	254
	255
	256
	257
	258
	259
	260
	261
	262
	263
	264
	265
	266	overview = """\
dafb483b	267	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.
b1462dfa RD	268
	269	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.
	270
	271	The two data objects are combined in a wxDataObjectComposite and the rest is handled by the framework.
	272	"""
899493dd	273