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1 | # superdoodle.py | |
2 | ||
3 | """ | |
4 | This module implements the SuperDoodle demo application. It takes the | |
5 | DoodleWindow previously presented and reuses it in a much more | |
6 | intelligent Frame. This one has a menu and a statusbar, is able to | |
7 | save and reload doodles, clear the workspace, and has a simple control | |
8 | panel for setting color and line thickness in addition to the popup | |
9 | menu that DoodleWindow provides. There is also a nice About dialog | |
10 | implmented using an wx.html.HtmlWindow. | |
11 | """ | |
12 | ||
13 | import wx # This module uses the new wx namespace | |
14 | import wx.html | |
15 | from wx.lib import buttons # for generic button classes | |
16 | from doodle import DoodleWindow | |
17 | ||
18 | import os, cPickle | |
19 | ||
20 | ||
21 | #---------------------------------------------------------------------- | |
22 | ||
23 | wx.RegisterId(5000) # Give a high starting value for the IDs, just for kicks | |
24 | ||
25 | idNEW = wx.NewId() | |
26 | idOPEN = wx.NewId() | |
27 | idSAVE = wx.NewId() | |
28 | idSAVEAS = wx.NewId() | |
29 | idCLEAR = wx.NewId() | |
30 | idEXIT = wx.NewId() | |
31 | idABOUT = wx.NewId() | |
32 | ||
33 | ||
34 | ||
35 | class DoodleFrame(wx.Frame): | |
36 | """ | |
37 | A DoodleFrame contains a DoodleWindow and a ControlPanel and manages | |
38 | their layout with a wx.BoxSizer. A menu and associated event handlers | |
39 | provides for saving a doodle to a file, etc. | |
40 | """ | |
41 | title = "Do a doodle" | |
42 | def __init__(self, parent): | |
43 | wx.Frame.__init__(self, parent, -1, self.title, size=(800,600), | |
44 | style=wx.DEFAULT_FRAME_STYLE | wx.NO_FULL_REPAINT_ON_RESIZE) | |
45 | self.CreateStatusBar() | |
46 | self.MakeMenu() | |
47 | self.filename = None | |
48 | ||
49 | self.doodle = DoodleWindow(self, -1) | |
50 | cPanel = ControlPanel(self, -1, self.doodle) | |
51 | ||
52 | # Create a sizer to layout the two windows side-by-side. | |
53 | # Both will grow vertically, the doodle window will grow | |
54 | # horizontally as well. | |
55 | box = wx.BoxSizer(wx.HORIZONTAL) | |
56 | box.Add(cPanel, 0, wx.EXPAND) | |
57 | box.Add(self.doodle, 1, wx.EXPAND) | |
58 | ||
59 | # Tell the frame that it should layout itself in response to | |
60 | # size events. | |
61 | self.SetAutoLayout(True) | |
62 | self.SetSizer(box) | |
63 | ||
64 | ||
65 | def SaveFile(self): | |
66 | if self.filename: | |
67 | data = self.doodle.GetLinesData() | |
68 | f = open(self.filename, 'w') | |
69 | cPickle.dump(data, f) | |
70 | f.close() | |
71 | ||
72 | ||
73 | def ReadFile(self): | |
74 | if self.filename: | |
75 | try: | |
76 | f = open(self.filename, 'r') | |
77 | data = cPickle.load(f) | |
78 | f.close() | |
79 | self.doodle.SetLinesData(data) | |
80 | except cPickle.UnpicklingError: | |
81 | wx.MessageBox("%s is not a doodle file." % self.filename, | |
82 | "oops!", style=wx.OK|wx.ICON_EXCLAMATION) | |
83 | ||
84 | ||
85 | def MakeMenu(self): | |
86 | # create the file menu | |
87 | menu1 = wx.Menu() | |
88 | ||
89 | # Using the "\tKeyName" syntax automatically creates a | |
90 | # wx.AcceleratorTable for this frame and binds the keys to | |
91 | # the menu items. | |
92 | menu1.Append(idOPEN, "&Open\tCtrl-O", "Open a doodle file") | |
93 | menu1.Append(idSAVE, "&Save\tCtrl-S", "Save the doodle") | |
94 | menu1.Append(idSAVEAS, "Save &As", "Save the doodle in a new file") | |
95 | menu1.AppendSeparator() | |
96 | menu1.Append(idCLEAR, "&Clear", "Clear the current doodle") | |
97 | menu1.AppendSeparator() | |
98 | menu1.Append(idEXIT, "E&xit", "Terminate the application") | |
99 | ||
100 | # and the help menu | |
101 | menu2 = wx.Menu() | |
102 | menu2.Append(idABOUT, "&About\tCtrl-H", "Display the gratuitous 'about this app' thingamajig") | |
103 | ||
104 | # and add them to a menubar | |
105 | menuBar = wx.MenuBar() | |
106 | menuBar.Append(menu1, "&File") | |
107 | menuBar.Append(menu2, "&Help") | |
108 | self.SetMenuBar(menuBar) | |
109 | ||
110 | self.Bind(wx.EVT_MENU, self.OnMenuOpen, id=idOPEN) | |
111 | self.Bind(wx.EVT_MENU, self.OnMenuSave, id=idSAVE) | |
112 | self.Bind(wx.EVT_MENU, self.OnMenuSaveAs, id=idSAVEAS) | |
113 | self.Bind(wx.EVT_MENU, self.OnMenuClear, id=idCLEAR) | |
114 | self.Bind(wx.EVT_MENU, self.OnMenuExit, id=idEXIT) | |
115 | self.Bind(wx.EVT_MENU, self.OnMenuAbout, id=idABOUT) | |
116 | ||
117 | ||
118 | ||
119 | wildcard = "Doodle files (*.ddl)|*.ddl|All files (*.*)|*.*" | |
120 | ||
121 | def OnMenuOpen(self, event): | |
122 | dlg = wx.FileDialog(self, "Open doodle file...", os.getcwd(), | |
123 | style=wx.OPEN, wildcard = self.wildcard) | |
124 | if dlg.ShowModal() == wx.ID_OK: | |
125 | self.filename = dlg.GetPath() | |
126 | self.ReadFile() | |
127 | self.SetTitle(self.title + ' -- ' + self.filename) | |
128 | dlg.Destroy() | |
129 | ||
130 | ||
131 | def OnMenuSave(self, event): | |
132 | if not self.filename: | |
133 | self.OnMenuSaveAs(event) | |
134 | else: | |
135 | self.SaveFile() | |
136 | ||
137 | ||
138 | def OnMenuSaveAs(self, event): | |
139 | dlg = wx.FileDialog(self, "Save doodle as...", os.getcwd(), | |
140 | style=wx.SAVE | wx.OVERWRITE_PROMPT, | |
141 | wildcard = self.wildcard) | |
142 | if dlg.ShowModal() == wx.ID_OK: | |
143 | filename = dlg.GetPath() | |
144 | if not os.path.splitext(filename)[1]: | |
145 | filename = filename + '.ddl' | |
146 | self.filename = filename | |
147 | self.SaveFile() | |
148 | self.SetTitle(self.title + ' -- ' + self.filename) | |
149 | dlg.Destroy() | |
150 | ||
151 | ||
152 | def OnMenuClear(self, event): | |
153 | self.doodle.SetLinesData([]) | |
154 | self.SetTitle(self.title) | |
155 | ||
156 | ||
157 | def OnMenuExit(self, event): | |
158 | self.Close() | |
159 | ||
160 | ||
161 | def OnMenuAbout(self, event): | |
162 | dlg = DoodleAbout(self) | |
163 | dlg.ShowModal() | |
164 | dlg.Destroy() | |
165 | ||
166 | ||
167 | ||
168 | #---------------------------------------------------------------------- | |
169 | ||
170 | ||
171 | class ControlPanel(wx.Panel): | |
172 | """ | |
173 | This class implements a very simple control panel for the DoodleWindow. | |
174 | It creates buttons for each of the colours and thickneses supported by | |
175 | the DoodleWindow, and event handlers to set the selected values. There is | |
176 | also a little window that shows an example doodleLine in the selected | |
177 | values. Nested sizers are used for layout. | |
178 | """ | |
179 | ||
180 | BMP_SIZE = 16 | |
181 | BMP_BORDER = 3 | |
182 | ||
183 | def __init__(self, parent, ID, doodle): | |
184 | wx.Panel.__init__(self, parent, ID, style=wx.RAISED_BORDER, size=(20,20)) | |
185 | ||
186 | numCols = 4 | |
187 | spacing = 4 | |
188 | ||
189 | btnSize = wx.Size(self.BMP_SIZE + 2*self.BMP_BORDER, | |
190 | self.BMP_SIZE + 2*self.BMP_BORDER) | |
191 | ||
192 | # Make a grid of buttons for each colour. Attach each button | |
193 | # event to self.OnSetColour. The button ID is the same as the | |
194 | # key in the colour dictionary. | |
195 | self.clrBtns = {} | |
196 | colours = doodle.menuColours | |
197 | keys = colours.keys() | |
198 | keys.sort() | |
199 | cGrid = wx.GridSizer(cols=numCols, hgap=2, vgap=2) | |
200 | for k in keys: | |
201 | bmp = self.MakeBitmap(colours[k]) | |
202 | b = buttons.GenBitmapToggleButton(self, k, bmp, size=btnSize ) | |
203 | b.SetBezelWidth(1) | |
204 | b.SetUseFocusIndicator(False) | |
205 | self.Bind(wx.EVT_BUTTON, self.OnSetColour, b) | |
206 | cGrid.Add(b, 0) | |
207 | self.clrBtns[colours[k]] = b | |
208 | self.clrBtns[colours[keys[0]]].SetToggle(True) | |
209 | ||
210 | ||
211 | # Make a grid of buttons for the thicknesses. Attach each button | |
212 | # event to self.OnSetThickness. The button ID is the same as the | |
213 | # thickness value. | |
214 | self.thknsBtns = {} | |
215 | tGrid = wx.GridSizer(cols=numCols, hgap=2, vgap=2) | |
216 | for x in range(1, doodle.maxThickness+1): | |
217 | b = buttons.GenToggleButton(self, x, str(x), size=btnSize) | |
218 | b.SetBezelWidth(1) | |
219 | b.SetUseFocusIndicator(False) | |
220 | self.Bind(wx.EVT_BUTTON, self.OnSetThickness, b) | |
221 | tGrid.Add(b, 0) | |
222 | self.thknsBtns[x] = b | |
223 | self.thknsBtns[1].SetToggle(True) | |
224 | ||
225 | # Make a colour indicator window, it is registerd as a listener | |
226 | # with the doodle window so it will be notified when the settings | |
227 | # change | |
228 | ci = ColourIndicator(self) | |
229 | doodle.AddListener(ci) | |
230 | doodle.Notify() | |
231 | self.doodle = doodle | |
232 | ||
233 | # Make a box sizer and put the two grids and the indicator | |
234 | # window in it. | |
235 | box = wx.BoxSizer(wx.VERTICAL) | |
236 | box.Add(cGrid, 0, wx.ALL, spacing) | |
237 | box.Add(tGrid, 0, wx.ALL, spacing) | |
238 | box.Add(ci, 0, wx.EXPAND|wx.ALL, spacing) | |
239 | self.SetSizer(box) | |
240 | self.SetAutoLayout(True) | |
241 | ||
242 | # Resize this window so it is just large enough for the | |
243 | # minimum requirements of the sizer. | |
244 | box.Fit(self) | |
245 | ||
246 | ||
247 | ||
248 | def MakeBitmap(self, colour): | |
249 | """ | |
250 | We can create a bitmap of whatever we want by simply selecting | |
251 | it into a wx.MemoryDC and drawing on it. In this case we just set | |
252 | a background brush and clear the dc. | |
253 | """ | |
254 | bmp = wx.EmptyBitmap(self.BMP_SIZE, self.BMP_SIZE) | |
255 | dc = wx.MemoryDC() | |
256 | dc.SelectObject(bmp) | |
257 | dc.SetBackground(wx.Brush(colour)) | |
258 | dc.Clear() | |
259 | dc.SelectObject(wx.NullBitmap) | |
260 | return bmp | |
261 | ||
262 | ||
263 | def OnSetColour(self, event): | |
264 | """ | |
265 | Use the event ID to get the colour, set that colour in the doodle. | |
266 | """ | |
267 | colour = self.doodle.menuColours[event.GetId()] | |
268 | if colour != self.doodle.colour: | |
269 | # untoggle the old colour button | |
270 | self.clrBtns[self.doodle.colour].SetToggle(False) | |
271 | # set the new colour | |
272 | self.doodle.SetColour(colour) | |
273 | ||
274 | ||
275 | def OnSetThickness(self, event): | |
276 | """ | |
277 | Use the event ID to set the thickness in the doodle. | |
278 | """ | |
279 | thickness = event.GetId() | |
280 | if thickness != self.doodle.thickness: | |
281 | # untoggle the old thickness button | |
282 | self.thknsBtns[self.doodle.thickness].SetToggle(False) | |
283 | # set the new colour | |
284 | self.doodle.SetThickness(thickness) | |
285 | ||
286 | ||
287 | ||
288 | #---------------------------------------------------------------------- | |
289 | ||
290 | class ColourIndicator(wx.Window): | |
291 | """ | |
292 | An instance of this class is used on the ControlPanel to show | |
293 | a sample of what the current doodle line will look like. | |
294 | """ | |
295 | def __init__(self, parent): | |
296 | wx.Window.__init__(self, parent, -1, style=wx.SUNKEN_BORDER) | |
297 | self.SetBackgroundColour(wx.WHITE) | |
298 | self.SetSize( (45, 45) ) | |
299 | self.colour = self.thickness = None | |
300 | self.Bind(wx.EVT_PAINT, self.OnPaint) | |
301 | ||
302 | ||
303 | def Update(self, colour, thickness): | |
304 | """ | |
305 | The doodle window calls this method any time the colour | |
306 | or line thickness changes. | |
307 | """ | |
308 | self.colour = colour | |
309 | self.thickness = thickness | |
310 | self.Refresh() # generate a paint event | |
311 | ||
312 | ||
313 | def OnPaint(self, event): | |
314 | """ | |
315 | This method is called when all or part of the window needs to be | |
316 | redrawn. | |
317 | """ | |
318 | dc = wx.PaintDC(self) | |
319 | if self.colour: | |
320 | sz = self.GetClientSize() | |
321 | pen = wx.Pen(self.colour, self.thickness) | |
322 | dc.BeginDrawing() | |
323 | dc.SetPen(pen) | |
324 | dc.DrawLine(10, sz.height/2, sz.width-10, sz.height/2) | |
325 | dc.EndDrawing() | |
326 | ||
327 | ||
328 | #---------------------------------------------------------------------- | |
329 | ||
330 | class DoodleAbout(wx.Dialog): | |
331 | """ An about box that uses an HTML window """ | |
332 | ||
333 | text = ''' | |
334 | <html> | |
335 | <body bgcolor="#ACAA60"> | |
336 | <center><table bgcolor="#455481" width="100%" cellspacing="0" | |
337 | cellpadding="0" border="1"> | |
338 | <tr> | |
339 | <td align="center"><h1>SuperDoodle</h1></td> | |
340 | </tr> | |
341 | </table> | |
342 | </center> | |
343 | <p><b>SuperDoodle</b> is a demonstration program for <b>wxPython</b> that | |
344 | will hopefully teach you a thing or two. Just follow these simple | |
345 | instructions: </p> | |
346 | <p> | |
347 | <ol> | |
348 | <li><b>Read</b> the Source... | |
349 | <li><b>Learn</b>... | |
350 | <li><b>Do!</b> | |
351 | </ol> | |
352 | ||
353 | <p><b>SuperDoodle</b> and <b>wxPython</b> are brought to you by | |
354 | <b>Robin Dunn</b> and <b>Total Control Software</b>, Copyright | |
355 | © 1997-2003.</p> | |
356 | </body> | |
357 | </html> | |
358 | ''' | |
359 | ||
360 | def __init__(self, parent): | |
361 | wx.Dialog.__init__(self, parent, -1, 'About SuperDoodle', | |
362 | size=(420, 380) ) | |
363 | ||
364 | html = wx.html.HtmlWindow(self, -1) | |
365 | html.SetPage(self.text) | |
366 | button = wx.Button(self, wx.ID_OK, "Okay") | |
367 | ||
368 | # constraints for the html window | |
369 | lc = wx.LayoutConstraints() | |
370 | lc.top.SameAs(self, wx.Top, 5) | |
371 | lc.left.SameAs(self, wx.Left, 5) | |
372 | lc.bottom.SameAs(button, wx.Top, 5) | |
373 | lc.right.SameAs(self, wx.Right, 5) | |
374 | html.SetConstraints(lc) | |
375 | ||
376 | # constraints for the button | |
377 | lc = wx.LayoutConstraints() | |
378 | lc.bottom.SameAs(self, wx.Bottom, 5) | |
379 | lc.centreX.SameAs(self, wx.CentreX) | |
380 | lc.width.AsIs() | |
381 | lc.height.AsIs() | |
382 | button.SetConstraints(lc) | |
383 | ||
384 | self.SetAutoLayout(True) | |
385 | self.Layout() | |
386 | self.CentreOnParent(wx.BOTH) | |
387 | ||
388 | ||
389 | #---------------------------------------------------------------------- | |
390 | ||
391 | class DoodleApp(wx.App): | |
392 | def OnInit(self): | |
393 | frame = DoodleFrame(None) | |
394 | frame.Show(True) | |
395 | self.SetTopWindow(frame) | |
396 | return True | |
397 | ||
398 | ||
399 | #---------------------------------------------------------------------- | |
400 | ||
401 | if __name__ == '__main__': | |
402 | app = DoodleApp(redirect=True) | |
403 | app.MainLoop() |