forked from vnpy/vnpy.github.io
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathbasic-tutorial-8.html
581 lines (497 loc) · 62.4 KB
/
basic-tutorial-8.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
<!DOCTYPE html>
<html lang="zh"
>
<head>
<title>Python量化交易平台开发教程系列8-顶层GUI界面开发（2） - vn.py</title>
<!-- Using the latest rendering mode for IE -->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="/images/favicon.png" rel="icon">
<link rel="canonical" href="/basic-tutorial-8.html">
<meta name="author" content="用Python的交易员" />
<meta name="description" content="原创文章，转载请注明出处：用Python的交易员 前言 接上一篇，主要分为两块：展示动态语言特性简化GUI开发的组件以及功能调用组件。 动态语言的方便之处 ######################################################################## class AccountMonitor(QtGui.QTableWidget): """用于显示账户""" signal = QtCore.pyqtSignal(type(Event())) dictLabels = OrderedDict() dictLabels['AccountID'] = u'投资者账户' dictLabels['PreBalance'] = u'昨结' dictLabels['Withdraw'] = u'出金' dictLabels['Deposit'] = u'入金' dictLabels['FrozenCash'] = u'冻结资金' dictLabels['FrozenMargin'] = u'冻结保证金' dictLabels['FrozenCommission'] = u'冻结手续费' dictLabels['FrozenTransferFee ..." />
<meta property="og:site_name" content="vn.py" />
<meta property="og:type" content="article"/>
<meta property="og:title" content="Python量化交易平台开发教程系列8-顶层GUI界面开发（2）"/>
<meta property="og:url" content="/basic-tutorial-8.html"/>
<meta property="og:description" content="原创文章，转载请注明出处：用Python的交易员 前言 接上一篇，主要分为两块：展示动态语言特性简化GUI开发的组件以及功能调用组件。 动态语言的方便之处 ######################################################################## class AccountMonitor(QtGui.QTableWidget): """用于显示账户""" signal = QtCore.pyqtSignal(type(Event())) dictLabels = OrderedDict() dictLabels['AccountID'] = u'投资者账户' dictLabels['PreBalance'] = u'昨结' dictLabels['Withdraw'] = u'出金' dictLabels['Deposit'] = u'入金' dictLabels['FrozenCash'] = u'冻结资金' dictLabels['FrozenMargin'] = u'冻结保证金' dictLabels['FrozenCommission'] = u'冻结手续费' dictLabels['FrozenTransferFee ..."/>
<meta property="article:published_time" content="2015-07-14" />
<meta property="article:section" content="文章" />
<meta property="article:author" content="用Python的交易员" />
<!-- Bootstrap -->
<link rel="stylesheet" href="/theme/css/bootstrap.readable.min.css" type="text/css"/>
<link href="/theme/css/font-awesome.min.css" rel="stylesheet">
<link href="/theme/css/pygments/monokai.css" rel="stylesheet">
<link rel="stylesheet" href="/theme/css/style.css" type="text/css"/>
<script>
var _hmt = _hmt || [];
(function() {
var hm = document.createElement("script");
hm.src = "//hm.baidu.com/hm.js?e8c7573f82d43fa50c895a8e28c49ceb";
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(hm, s);
})();
</script>
</head>
<body>
<div class="navbar navbar-default navbar-fixed-top" role="navigation">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a href="/" class="navbar-brand">
<img src="/images/favicon.png" width=""/> vn.py </a>
</div>
<div class="collapse navbar-collapse navbar-ex1-collapse">
<ul class="nav navbar-nav">
<li><a href="/pages/quickstart.html">
Quick Start
</a></li>
<li><a href="/pages/tutorial.html">
教程
</a></li>
<li><a href="/pages/blog.html">
日志
</a></li>
<li><a href="/pages/screenshot.html">
截图
</a></li>
<li><a href="/pages/community.html">
社区
</a></li>
<li><a href="/pages/api.html">
API接口
</a></li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li><a href="/archives.html"><i class="fa fa-th-list"></i><span class="icon-label">Archives</span></a></li>
</ul>
</div>
<!-- /.navbar-collapse -->
</div>
</div> <!-- /.navbar -->
<!-- Banner -->
<style>
#banner{
background-image:url("/images/banner.png");
}
</style>
<div id="banner">
<div class="container">
<div class="copy">
<h1>vn.py</h1>
<p class="intro">Developed by traders, for traders.</p>
</div>
</div>
</div><!-- End Banner -->
<div class="container">
<div class="row">
<div class="col-sm-9">
<section id="content">
<article>
<header class="page-header">
<h1>
<a href="/basic-tutorial-8.html"
rel="bookmark"
title="Permalink to Python量化交易平台开发教程系列8-顶层GUI界面开发（2）">
Python量化交易平台开发教程系列8-顶层GUI界面开发（2）
</a>
</h1>
</header>
<div class="entry-content">
<div class="panel">
<div class="panel-body">
<footer class="post-info">
<span class="label label-default">Date</span>
<span class="published">
<i class="fa fa-calendar"></i><time datetime="2015-07-14T13:20:00+08:00"> 2015-07-14(周二)</time>
</span>
</footer><!-- /.post-info --> </div>
</div>
<p>原创文章，转载请注明出处：用Python的交易员</p>
<h2>前言</h2>
<p>接上一篇，主要分为两块：展示动态语言特性简化GUI开发的组件以及功能调用组件。</p>
<h2>动态语言的方便之处</h2>
<div class="highlight"><pre><span class="c">########################################################################</span>
<span class="k">class</span> <span class="nc">AccountMonitor</span><span class="p">(</span><span class="n">QtGui</span><span class="o">.</span><span class="n">QTableWidget</span><span class="p">):</span>
<span class="sd">"""用于显示账户"""</span>
<span class="n">signal</span> <span class="o">=</span> <span class="n">QtCore</span><span class="o">.</span><span class="n">pyqtSignal</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">Event</span><span class="p">()))</span>
<span class="n">dictLabels</span> <span class="o">=</span> <span class="n">OrderedDict</span><span class="p">()</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'AccountID'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'投资者账户'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'PreBalance'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'昨结'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'Withdraw'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'出金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'Deposit'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'入金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'FrozenCash'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'冻结资金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'FrozenMargin'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'冻结保证金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'FrozenCommission'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'冻结手续费'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'FrozenTransferFee'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'冻结过户费'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'FrozenStampTax'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'冻结印花税'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'Commission'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'手续费'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'TransferFee'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'过户费'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'StampTax'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'印花税'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'CurrMargin'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'当前保证金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'Available'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'可用资金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'WithdrawQuota'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'可取资金'</span>
<span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">eventEngine</span><span class="p">,</span> <span class="n">parent</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="sd">"""Constructor"""</span>
<span class="nb">super</span><span class="p">(</span><span class="n">AccountMonitor</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="n">parent</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__eventEngine</span> <span class="o">=</span> <span class="n">eventEngine</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dictAccount</span> <span class="o">=</span> <span class="p">{}</span> <span class="c"># 用来保存账户对应的单元格</span>
<span class="bp">self</span><span class="o">.</span><span class="n">initUi</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">registerEvent</span><span class="p">()</span>
<span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">initUi</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">""""""</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setWindowTitle</span><span class="p">(</span><span class="s">u'账户'</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setColumnCount</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dictLabels</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setHorizontalHeaderLabels</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dictLabels</span><span class="o">.</span><span class="n">values</span><span class="p">())</span>
<span class="bp">self</span><span class="o">.</span><span class="n">verticalHeader</span><span class="p">()</span><span class="o">.</span><span class="n">setVisible</span><span class="p">(</span><span class="bp">False</span><span class="p">)</span> <span class="c"># 关闭左边的垂直表头</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setEditTriggers</span><span class="p">(</span><span class="n">QtGui</span><span class="o">.</span><span class="n">QTableWidget</span><span class="o">.</span><span class="n">NoEditTriggers</span><span class="p">)</span> <span class="c"># 设为不可编辑状态</span>
<span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">registerEvent</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">""""""</span>
<span class="bp">self</span><span class="o">.</span><span class="n">signal</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">updateAccount</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__eventEngine</span><span class="o">.</span><span class="n">register</span><span class="p">(</span><span class="n">EVENT_ACCOUNT</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">signal</span><span class="o">.</span><span class="n">emit</span><span class="p">)</span>
<span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">updateAccount</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="p">):</span>
<span class="sd">""""""</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">event</span><span class="o">.</span><span class="n">dict_</span><span class="p">[</span><span class="s">'data'</span><span class="p">]</span>
<span class="n">accountid</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="s">'AccountID'</span><span class="p">]</span>
<span class="c"># 如果之前已经收到过这个账户的数据, 则直接更新</span>
<span class="k">if</span> <span class="n">accountid</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dictAccount</span><span class="p">:</span>
<span class="n">d</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dictAccount</span><span class="p">[</span><span class="n">accountid</span><span class="p">]</span>
<span class="k">for</span> <span class="n">label</span><span class="p">,</span> <span class="n">cell</span> <span class="ow">in</span> <span class="n">d</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="n">cell</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="n">label</span><span class="p">]))</span>
<span class="c"># 否则插入新的一行，并更新</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">insertRow</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="n">d</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">for</span> <span class="n">col</span><span class="p">,</span> <span class="n">label</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dictLabels</span><span class="o">.</span><span class="n">keys</span><span class="p">()):</span>
<span class="n">cell</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QTableWidgetItem</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="n">label</span><span class="p">]))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setItem</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">cell</span><span class="p">)</span>
<span class="n">d</span><span class="p">[</span><span class="n">label</span><span class="p">]</span> <span class="o">=</span> <span class="n">cell</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dictAccount</span><span class="p">[</span><span class="n">accountid</span><span class="p">]</span> <span class="o">=</span> <span class="n">d</span>
</pre></div>
<p>写过C++里Qt代码的人可能会有比较直观的感受，上面这段代码利用Python动态语言的特性偷了不少懒。</p>
<p>该账户监控组件AccountMonitor用于显示LTS账户相关的数据（可用资金、手续费、保证金等等）。在vn.lts的API封装中，通过onRspQryTradingAccount推送回来的账户数据已经被从C++结构体自动转换为了Python字典。</p>
<div class="highlight"><pre><span class="c">########################################################################</span>
<span class="k">class</span> <span class="nc">AccountMonitor</span><span class="p">(</span><span class="n">QtGui</span><span class="o">.</span><span class="n">QTableWidget</span><span class="p">):</span>
<span class="sd">"""用于显示账户"""</span>
<span class="n">signal</span> <span class="o">=</span> <span class="n">QtCore</span><span class="o">.</span><span class="n">pyqtSignal</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">Event</span><span class="p">()))</span>
<span class="n">dictLabels</span> <span class="o">=</span> <span class="n">OrderedDict</span><span class="p">()</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'AccountID'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'投资者账户'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'PreBalance'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'昨结'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'Withdraw'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'出金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'Deposit'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'入金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'FrozenCash'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'冻结资金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'FrozenMargin'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'冻结保证金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'FrozenCommission'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'冻结手续费'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'FrozenTransferFee'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'冻结过户费'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'FrozenStampTax'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'冻结印花税'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'Commission'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'手续费'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'TransferFee'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'过户费'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'StampTax'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'印花税'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'CurrMargin'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'当前保证金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'Available'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'可用资金'</span>
<span class="n">dictLabels</span><span class="p">[</span><span class="s">'WithdrawQuota'</span><span class="p">]</span> <span class="o">=</span> <span class="s">u'可取资金'</span>
</pre></div>
<p>首先通过原生API的.h头文件查询该结构体包含的字段内容，并选择觉得有用、需要显示出来的字段，使用Python内置的排序字典类OrderedDict创建标签显示的配置dictLabels，按照我们希望显示的顺序（从左到右）逐条输入到该字典中。字典的键是该字段的英文名称，值是该字段对应的中文名称。</p>
<div class="highlight"><pre> <span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">initUi</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">""""""</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setWindowTitle</span><span class="p">(</span><span class="s">u'账户'</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setColumnCount</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dictLabels</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setHorizontalHeaderLabels</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dictLabels</span><span class="o">.</span><span class="n">values</span><span class="p">())</span>
</pre></div>
<p>下一步在初始化表格时，表头的列数可以直接取dictLabels的长度，表头的标签内容可以直接取dictLabels的值列表。</p>
<div class="highlight"><pre> <span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">updateAccount</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="p">):</span>
<span class="sd">""""""</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">event</span><span class="o">.</span><span class="n">dict_</span><span class="p">[</span><span class="s">'data'</span><span class="p">]</span>
<span class="n">accountid</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="s">'AccountID'</span><span class="p">]</span>
<span class="c"># 如果之前已经收到过这个账户的数据, 则直接更新</span>
<span class="k">if</span> <span class="n">accountid</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dictAccount</span><span class="p">:</span>
<span class="n">d</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dictAccount</span><span class="p">[</span><span class="n">accountid</span><span class="p">]</span>
<span class="k">for</span> <span class="n">label</span><span class="p">,</span> <span class="n">cell</span> <span class="ow">in</span> <span class="n">d</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="n">cell</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="n">label</span><span class="p">]))</span>
<span class="c"># 否则插入新的一行，并更新</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">insertRow</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="n">d</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">for</span> <span class="n">col</span><span class="p">,</span> <span class="n">label</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dictLabels</span><span class="o">.</span><span class="n">keys</span><span class="p">()):</span>
<span class="n">cell</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QTableWidgetItem</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="n">label</span><span class="p">]))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setItem</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">cell</span><span class="p">)</span>
<span class="n">d</span><span class="p">[</span><span class="n">label</span><span class="p">]</span> <span class="o">=</span> <span class="n">cell</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dictAccount</span><span class="p">[</span><span class="n">accountid</span><span class="p">]</span> <span class="o">=</span> <span class="n">d</span>
</pre></div>
<p>在更新账户数据时，由于dictLabels中设置的需要显示的字段和收到的账户数据字典data中的键是一一对应的，我们可以直接对dictLabels中的键进行遍历读取data字典中对应的值，并更新到表格中。这段感觉比较难以用语言描述出来，直接读懂上面的代码可能更能明白其中的意思。</p>
<p>可以来比较下updateAccount函数的类C++的写法，也是作者在刚开始做GUI开发时使用的方法，现在回看起来真是繁琐。</p>
<div class="highlight"><pre> <span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">updateAccount</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="p">):</span>
<span class="sd">""""""</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">event</span><span class="o">.</span><span class="n">dict_</span><span class="p">[</span><span class="s">'data'</span><span class="p">]</span>
<span class="n">accountid</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="s">'AccountID'</span><span class="p">]</span>
<span class="c"># 如果之前已经收到过这个账户的数据, 则直接更新</span>
<span class="k">if</span> <span class="n">accountid</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dictAccount</span><span class="p">:</span>
<span class="n">d</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dictAccount</span><span class="p">[</span><span class="n">accountid</span><span class="p">]</span>
<span class="n">d</span><span class="p">[</span><span class="s">'AccountID'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'AccountID'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'PreBalance'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'PreBalance'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'Deposit'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'Deposit'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'FrozenCash'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'FrozenCash'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'FrozenMargin'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'FrozenMargin'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'FrozenCommission'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'FrozenCommission'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'FrozenTransferFee'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'FrozenTransferFee'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'FrozenStampTax'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'FrozenStampTax'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'Commission'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'Commission'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'TransferFee'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'TransferFee'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'StampTax'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'StampTax'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'CurrMargin'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'CurrMargin'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'Available'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'Available'</span><span class="p">]))</span>
<span class="n">d</span><span class="p">[</span><span class="s">'WithdrawQuota'</span><span class="p">]</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'WithdrawQuota'</span><span class="p">]))</span>
<span class="c"># 否则插入新的一行，并更新</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">insertRow</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="n">d</span> <span class="o">=</span> <span class="p">{}</span>
<span class="n">cellAccountID</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QTableWidgetItem</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'AccountID'</span><span class="p">]))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setItem</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">cellAccountID</span><span class="p">)</span>
<span class="n">d</span><span class="p">[</span><span class="s">'AccountID'</span><span class="p">]</span> <span class="o">=</span> <span class="n">cell</span>
<span class="n">cellPreBalance</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QTableWidgetItem</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="s">'PreBalance'</span><span class="p">]))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setItem</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">cellPreBalance</span><span class="p">)</span>
<span class="n">d</span><span class="p">[</span><span class="s">'PreBalance'</span><span class="p">]</span> <span class="o">=</span> <span class="n">cell</span>
<span class="o">...</span>
<span class="err">（后面的字段以此类推，这里请原谅作者实在不想写下去了，习惯遍历后复制粘贴都觉得麻烦）</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dictAccount</span><span class="p">[</span><span class="n">accountid</span><span class="p">]</span> <span class="o">=</span> <span class="n">d</span>
</pre></div>
<p>和上面的类C++写法相比，之前Python写法的优势就很明显了：</p>
<ul>
<li>
<p>代码行数显著减少（绝大部分都是重复内容），降低了coding时出错的概率，省下很多debug的时间</p>
</li>
<li>
<p>dictLabels可以直接作为配置来使用（类似于Java中使用很多配置文件），当需要增加或者移除某个字段时，用户只需更改dictLabels中的内容而无需改变initUi和updateAccount（这才是浪费无数debug时间的地方），同时修改的配置和本身的程序代码一样都是Python源代码文件（不像Java使用XML等其他文件进行配置）</p>
</li>
</ul>
<p>当然也存在一个缺点：理论上list遍历的使用降低了性能（GUI的更新耗时更长），但是作者以一个实际用户的经验可以告诉大家，这个性能上的牺牲微乎其微，考虑到vn.py的应用场景，这个缺点几乎可以忽略。</p>
<p>（限于作者本身的C++水平，以上这段编程语言的比较可能有不正确之处，欢迎读者指出。）</p>
<h2>功能调用组件</h2>
<div class="highlight"><pre><span class="c">########################################################################</span>
<span class="k">class</span> <span class="nc">LoginWidget</span><span class="p">(</span><span class="n">QtGui</span><span class="o">.</span><span class="n">QDialog</span><span class="p">):</span>
<span class="sd">"""登录"""</span>
<span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">mainEngine</span><span class="p">,</span> <span class="n">parent</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="sd">"""Constructor"""</span>
<span class="nb">super</span><span class="p">(</span><span class="n">LoginWidget</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__mainEngine</span> <span class="o">=</span> <span class="n">mainEngine</span>
<span class="bp">self</span><span class="o">.</span><span class="n">initUi</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">loadData</span><span class="p">()</span>
<span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">initUi</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""初始化界面"""</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setWindowTitle</span><span class="p">(</span><span class="s">u'登录'</span><span class="p">)</span>
<span class="c"># 设置组件</span>
<span class="n">labelUserID</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QLabel</span><span class="p">(</span><span class="s">u'账号：'</span><span class="p">)</span>
<span class="n">labelMdPassword</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QLabel</span><span class="p">(</span><span class="s">u'行情密码：'</span><span class="p">)</span>
<span class="n">labelTdPassword</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QLabel</span><span class="p">(</span><span class="s">u'交易密码：'</span><span class="p">)</span>
<span class="n">labelMdAddress</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QLabel</span><span class="p">(</span><span class="s">u'行情服务器：'</span><span class="p">)</span>
<span class="n">labelTdAddress</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QLabel</span><span class="p">(</span><span class="s">u'交易服务器：'</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">editUserID</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QLineEdit</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">editMdPassword</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QLineEdit</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">editTdPassword</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QLineEdit</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">editMdAddress</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QLineEdit</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">editTdAddress</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QLineEdit</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">editUserID</span><span class="o">.</span><span class="n">setMinimumWidth</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="n">buttonLogin</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QPushButton</span><span class="p">(</span><span class="s">u'登录'</span><span class="p">)</span>
<span class="n">buttonCancel</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QPushButton</span><span class="p">(</span><span class="s">u'取消'</span><span class="p">)</span>
<span class="n">buttonLogin</span><span class="o">.</span><span class="n">clicked</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">login</span><span class="p">)</span>
<span class="n">buttonCancel</span><span class="o">.</span><span class="n">clicked</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">close</span><span class="p">)</span>
<span class="c"># 设置布局</span>
<span class="n">buttonHBox</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QHBoxLayout</span><span class="p">()</span>
<span class="n">buttonHBox</span><span class="o">.</span><span class="n">addStretch</span><span class="p">()</span>
<span class="n">buttonHBox</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="n">buttonLogin</span><span class="p">)</span>
<span class="n">buttonHBox</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="n">buttonCancel</span><span class="p">)</span>
<span class="n">grid</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QGridLayout</span><span class="p">()</span>
<span class="n">grid</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="n">labelUserID</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">grid</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="n">labelMdPassword</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">grid</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="n">labelTdPassword</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">grid</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="n">labelMdAddress</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">grid</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="n">labelTdAddress</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">grid</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editUserID</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="n">grid</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editMdPassword</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="n">grid</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editTdPassword</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="n">grid</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editMdAddress</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="n">grid</span><span class="o">.</span><span class="n">addWidget</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editTdAddress</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="n">grid</span><span class="o">.</span><span class="n">addLayout</span><span class="p">(</span><span class="n">buttonHBox</span><span class="p">,</span> <span class="mi">5</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setLayout</span><span class="p">(</span><span class="n">grid</span><span class="p">)</span>
<span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">login</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""登录"""</span>
<span class="n">userid</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editUserID</span><span class="o">.</span><span class="n">text</span><span class="p">())</span>
<span class="n">mdPassword</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editMdPassword</span><span class="o">.</span><span class="n">text</span><span class="p">())</span>
<span class="n">tdPassword</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editTdPassword</span><span class="o">.</span><span class="n">text</span><span class="p">())</span>
<span class="n">mdAddress</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editMdAddress</span><span class="o">.</span><span class="n">text</span><span class="p">())</span>
<span class="n">tdAddress</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editTdAddress</span><span class="o">.</span><span class="n">text</span><span class="p">())</span>
<span class="n">brokerid</span> <span class="o">=</span> <span class="s">'2011'</span> <span class="c"># 这里因为LTS的BrokerID固定为2011</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__mainEngine</span><span class="o">.</span><span class="n">login</span><span class="p">(</span><span class="n">userid</span><span class="p">,</span> <span class="n">mdPassword</span><span class="p">,</span> <span class="n">tdPassword</span><span class="p">,</span> <span class="n">brokerid</span><span class="p">,</span> <span class="n">mdAddress</span><span class="p">,</span> <span class="n">tdAddress</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">loadData</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""读取数据"""</span>
<span class="n">f</span> <span class="o">=</span> <span class="n">shelve</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="s">'setting.vn'</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">setting</span> <span class="o">=</span> <span class="n">f</span><span class="p">[</span><span class="s">'login'</span><span class="p">]</span>
<span class="n">userid</span> <span class="o">=</span> <span class="n">setting</span><span class="p">[</span><span class="s">'userid'</span><span class="p">]</span>
<span class="n">mdPassword</span> <span class="o">=</span> <span class="n">setting</span><span class="p">[</span><span class="s">'mdPassword'</span><span class="p">]</span>
<span class="n">tdPassword</span> <span class="o">=</span> <span class="n">setting</span><span class="p">[</span><span class="s">'tdPassword'</span><span class="p">]</span>
<span class="n">mdAddress</span> <span class="o">=</span> <span class="n">setting</span><span class="p">[</span><span class="s">'mdAddress'</span><span class="p">]</span>
<span class="n">tdAddress</span> <span class="o">=</span> <span class="n">setting</span><span class="p">[</span><span class="s">'tdAddress'</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">editUserID</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="n">userid</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">editMdPassword</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="n">mdPassword</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">editTdPassword</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="n">tdPassword</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">editMdAddress</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="n">mdAddress</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">editTdAddress</span><span class="o">.</span><span class="n">setText</span><span class="p">(</span><span class="n">tdAddress</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="n">f</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">saveData</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""保存数据"""</span>
<span class="n">setting</span> <span class="o">=</span> <span class="p">{}</span>
<span class="n">setting</span><span class="p">[</span><span class="s">'userid'</span><span class="p">]</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editUserID</span><span class="o">.</span><span class="n">text</span><span class="p">())</span>
<span class="n">setting</span><span class="p">[</span><span class="s">'mdPassword'</span><span class="p">]</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editMdPassword</span><span class="o">.</span><span class="n">text</span><span class="p">())</span>
<span class="n">setting</span><span class="p">[</span><span class="s">'tdPassword'</span><span class="p">]</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editTdPassword</span><span class="o">.</span><span class="n">text</span><span class="p">())</span>
<span class="n">setting</span><span class="p">[</span><span class="s">'mdAddress'</span><span class="p">]</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editMdAddress</span><span class="o">.</span><span class="n">text</span><span class="p">())</span>
<span class="n">setting</span><span class="p">[</span><span class="s">'tdAddress'</span><span class="p">]</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">editTdAddress</span><span class="o">.</span><span class="n">text</span><span class="p">())</span>
<span class="n">f</span> <span class="o">=</span> <span class="n">shelve</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="s">'setting.vn'</span><span class="p">)</span>
<span class="n">f</span><span class="p">[</span><span class="s">'login'</span><span class="p">]</span> <span class="o">=</span> <span class="n">setting</span>
<span class="n">f</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="c">#----------------------------------------------------------------------</span>
<span class="k">def</span> <span class="nf">closeEvent</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="p">):</span>
<span class="sd">"""关闭事件处理"""</span>
<span class="c"># 当窗口被关闭时，先保存登录数据，再关闭</span>
<span class="bp">self</span><span class="o">.</span><span class="n">saveData</span><span class="p">()</span>
<span class="n">event</span><span class="o">.</span><span class="n">accept</span><span class="p">()</span>
</pre></div>
<ol>
<li>
<p>主动调用组件通常在工作原理上较为简单，用户只需在界面上放置所需的组件（按钮、下拉框等），并将组件的信号和中层引擎暴露的功能函数连接上（参考上面的initUi和login方法）</p>
</li>
<li>
<p>对于一些我们希望保存下来省去每次输入麻烦的信息，这里推荐Python的shelve库，可以直接将Python中的数据对象以二进制的方式保存在文件中（文件后缀名可以自行定义）</p>
</li>
<li>
<p>在登录组件第一次创建时，我们从硬盘上的setting.vn文件中尝试读取登录账号等设置内容，同时每次在关闭该窗口时closeEvent方法会被自动触发，保存当前文本框中的设置内容到文件中</p>
</li>
</ol>
<h2>总结</h2>
<p>系列7和8两篇教程中已经基本覆盖了GUI界面开发的核心原理，剩下的更多细节以及开发中的一些奇技淫巧就留给读者自己去研究vn.py项目的源代码了，毕竟对于这套教程的目标读者，有能力去开发适合自己交易策略的量化平台才是最终目标：now it's time to get your hands dirty。 </p>
<p>至此，Python量化交易平台开发教程系列告一段落，作者接下来会将更多的精力放在vn.py项目本身的开发上。同时vn.py的社区已经初具规模，QQ群已经逐渐不能满足大家交流的需求，针对Python量化交易开发的一个论坛也已经初步搭好，近期将会开放，欢迎大家入驻。</p>
</div>
<!-- /.entry-content -->
</article>
</section>
</div>
<div class="col-sm-3" id="sidebar">
<aside>
<section class="well well-sm">
<ul class="list-group list-group-flush">
<li class="list-group-item"><h4><i class="fa fa-home fa-lg"></i><span class="icon-label">Social</span></h4>
<ul class="list-group" id="social">
<li class="list-group-item"><a href="http://github.com/vnpy/vnpy"><i class="fa fa-github-square fa-lg"></i> Github</a></li>
</ul>
</li>
<li class="list-group-item"><h4><i class="fa fa-external-link-square fa-lg"></i><span class="icon-label">Links</span></h4>
<ul class="list-group" id="links">
<li class="list-group-item">
<a href="http://github.com/vnpy/vnpy/tree/master/vn.trader" target="_blank">
交易平台
</a>
</li>
<li class="list-group-item">
<a href="http://github.com/vnpy/vnpy/tree/master/vn.event" target="_blank">
事件引擎
</a>
</li>
<li class="list-group-item">
<a href="http://github.com/vnpy/vnpy/tree/master/vn.ctp" target="_blank">
CTP接口
</a>
</li>
<li class="list-group-item">
<a href="http://github.com/vnpy/vnpy/tree/master/vn.xspeed" target="_blank">
飞创接口
</a>
</li>
<li class="list-group-item">
<a href="http://github.com/vnpy/vnpy/tree/master/vn.femas" target="_blank">
飞马接口
</a>
</li>
<li class="list-group-item">
<a href="https://github.com/vnpy/vnpy/tree/master/vn.lts" target="_blank">
LTS接口
</a>
</li>
<li class="list-group-item">
<a href="http://github.com/vnpy/vnpy/tree/master/vn.ksotp" target="_blank">
金仕达期权接口
</a>
</li>
<li class="list-group-item">
<a href="http://github.com/vnpy/vnpy/tree/master/vn.ksgold" target="_blank">
金仕达黄金接口
</a>
</li>
<li class="list-group-item">
<a href="http://github.com/vnpy/vnpy/tree/master/vn.sgit" target="_blank">
飞鼠接口
</a>
</li>
<li class="list-group-item">
<a href="http://github.com/vnpy/vnpy/tree/master/vn.oanda" target="_blank">
OANDA接口
</a>
</li>
<li class="list-group-item">
<a href="http://github.com/vnpy/vnpy/tree/master/vn.datayes" target="_blank">
通联数据接口
</a>
</li>
<li class="list-group-item">
<a href="http://github.com/vnpy/vnpy/tree/master/vn.demo" target="_blank">
开发DEMO
</a>
</li>
</ul>
</li>
</ul>
</section>
</aside>
</div>
</div>
</div>
<footer>
<div class="container">
<hr>
<div class="row">
<div class="col-xs-10">© 2016 用Python的交易员
· Powered by <a href="https://github.com/DandyDev/pelican-bootstrap3" target="_blank">pelican-bootstrap3</a>,
<a href="http://docs.getpelican.com/" target="_blank">Pelican</a>,
<a href="http://getbootstrap.com" target="_blank">Bootstrap</a> </div>
<div class="col-xs-2"><p class="pull-right"><i class="fa fa-arrow-up"></i> <a href="#">Back to top</a></p></div>
</div>
</div>
</footer>
<script src="/theme/js/jquery.min.js"></script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script src="/theme/js/bootstrap.min.js"></script>
<!-- Enable responsive features in IE8 with Respond.js (https://github.com/scottjehl/Respond) -->
<script src="/theme/js/respond.min.js"></script>
<script src="/theme/js/bodypadding.js"></script>
</body>
</html>