PHP+Gtk实例(求24点)

• 作者: Laruence(   )
• 本文地址: http://www.laruence.com/2009/05/26/871.html
• 转载请注明出处

最近要安排我为BIT提供的《PHP高级应用–关于PHP你不知道的》一门课的讲课素材, 其中有部分涉及到PHP和Gtk2开发桌面应用的部分, 于是抽空就想写一了一个demo出来.

这是一个经典的求24的算法的PHP实现, 加上了Gtk2的界面, 其实也没什么复杂的, 和MFC开发没什么太大的区别， 唯一的不爽， 就是要自己用代码来写布局。。。

有兴趣的同学可以看看.

后记: 这里有一个网页版的, 可以用来玩玩: http://www.laruence.com/stashes/compute.php

运行截图

完整源代码(PHP-Gtk example):

1. <?php
2. /**
3. * A 24 maker
4. * @version 1.0.0
5. * @author laruence<laruence at yahoo.com.cn>
6. * @copyright (c) 2009 http://www.laruence.com
7. */
8. class TwentyFourCal extends GtkWindow {
9. private $chalkboard;
10. private $inputs;
11. public $needle = 24;
12. public $precision = '1e-6';
13. function TwentyFourCal() {
14. parent::__construct();
15. $this->draw();
16. $this->show();
17. }
18. /**
19. * 画窗体方法
20. */
21. public function draw() {
22. $this->set_default_size(200, 200);
23. $this->set_title("24计算器");
24. $mesg = new GtkLabel('Please input 4 integer(0-99):');
25. $this->chalkboard = new GtkLabel();
26. $this->inputs = $inputs = array(
27. new GtkEntry(),
28. new GtkEntry(),
29. new GtkEntry(),
30. new GtkEntry()
31. );
32. /**
33. * container
34. */
35. $table = new GtkTable(4, 1, 0);
36. $layout = array(
37. 'left' => 0,
38. 'right' => 1,
39. 'top'     => 0,
40. 'bottom' => 1,
41. );
42. $vBox = new GtkVBox(false, true);
43. $vBox->pack_start($mesg);
44. foreach ( $inputs as $input ) {
45. $input->set_max_length(2);
46. $table->attach($input, $layout['left'], $layout['right'],
47. $layout['top']++, $layout['bottom']++);
48. }
49. $vBox->pack_start($table);
50. $button = new GtkButton("Calculate");
51. $button->connect("clicked", array($this, "calculate"));
52. $vBox->pack_start($this->chalkboard);
53. $vBox->pack_start($button, true, false);
54. $this->add($vBox);
55. }
56. public function show() {
57. $this->show_all(); // 显示窗体
58. }
59. private function notice($mesg) {
60. $this->chalkboard->set_text($mesg);
61. }
62. /**
63. * 取得用户输入方法
64. */
65. public function calculate() {
66. $operants = array();
67. $inputs = $this->inputs;
68. foreach ($inputs as $input) {
69. $number = $input->get_text();
70. if (!preg_match('/^\s*\d+\s*$/', $number)) {
71. $this->notice('pleas input for integer(0-99)');
72. return ;
73. }
74. array_push($operants, $number);
75. }
76. $length = count($operants);
77. try {
78. $this->search($operants, 4);
79. } catch (Exception $e) {
80. $this->notice($e->getMessage());
81. return;
82. }
83. $this->notice('can\'t compute!');
84. return;
85. }
86. /**
87. * 求24点算法PHP实现
88. */
89. private function search($expressions, $level) {
90. if ($level == 1) {
91. $result = 'return ' . $expressions[0] . ';';
92. if ( abs(eval($result) - $this->needle) <= $this->precision) {
93. throw new Exception($expressions[0]);
94. }
95. }
96. for ($i=0;$i<$level;$i++) {
97. for ($j=$i+1;$j<$level;$j++) {
98. $expLeft = $expressions[$i];
99. $expRight = $expressions[$j];
100. $expressions[$j] = $expressions[$level - 1];
101. $expressions[$i] = '(' . $expLeft . ' + ' . $expRight . ')';
102. $this->search($expressions, $level - 1);
103. $expressions[$i] = '(' . $expLeft . ' * ' . $expRight . ')';
104. $this->search($expressions, $level - 1);
105. $expressions[$i] = '(' . $expLeft . ' - ' . $expRight . ')';
106. $this->search($expressions, $level - 1);
107. $expressions[$i] = '(' . $expRight . ' - ' . $expLeft . ')';
108. $this->search($expressions, $level - 1);
109. if ($expLeft != 0) {
110. $expressions[$i] = '(' . $expRight . ' / ' . $expLeft . ')';
111. $this->search($expressions, $level - 1);
112. }
113. if ($expRight != 0) {
114. $expressions[$i] = '(' . $expLeft . ' / ' . $expRight . ')';
115. $this->search($expressions, $level - 1);
116. }
117. $expressions[$i] = $expLeft;
118. $expressions[$j] = $expRight;
119. }
120. }
121. return false;
122. }
123. function __destruct() {
124. Gtk::main_quit();
125. }
126. }
127. new TwentyFourCal();
128. Gtk::main(); //进入GTK主循环
129. ?>

GTK1的API Reference : http://gtk.php.net/manual/en/gtk.gtkentry.php

GTK2的API Reference: 很不完整