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 372 </script>
 373 <title>EventManager Class Reference</title>
 374 </head>
 375 <body>
 376 <div id="header">
 377 <h1>EventManager Class Reference</h1>
 378 <div id="toc">
 379   <div id="toctitle">Table of Contents</div>
 380   <noscript><p><b>JavaScript must be enabled in your browser to display the table of contents.</b></p></noscript>
 381 </div>
 382 </div>
 383 <h2>1. Attributes</h2>
 384 <div class="sectionbody">
 385 <p><em>Italics</em> means private (in the sense that they shouldn't be set manually).</p>
 386 <div class="tableblock">
 387 <table rules="all"
 388 frame="hsides"
 389 cellspacing="0" cellpadding="4">
 390 <col width="251" />
 391 <col width="240" />
 392 <thead>
 393   <tr>
 394     <th align="left">
 395     Attribute
 396     </th>
 397     <th align="left">
 398     Description
 399     </th>
 400   </tr>
 401 </thead>
 402 <tbody valign="top">
 403   <tr>
 404     <td align="left">
 405     <strong>keyboard</strong>
 406     </td>
 407     <td align="left">
 408     keyboard event table
 409     </td>
 410   </tr>
 411   <tr>
 412     <td align="left">
 413     keyboard.pressed
 414     </td>
 415     <td align="left">
 416     keyboard pressed events
 417     </td>
 418   </tr>
 419   <tr>
 420     <td align="left">
 421     keyboard.released
 422     </td>
 423     <td align="left">
 424     keyboard release events
 425     </td>
 426   </tr>
 427   <tr>
 428     <td align="left">
 429     <strong>mouse</strong>
 430     </td>
 431     <td align="left">
 432     mouse event table
 433     </td>
 434   </tr>
 435   <tr>
 436     <td align="left">
 437     mouse.motion
 438     </td>
 439     <td align="left">
 440     mouse motion event
 441     </td>
 442   </tr>
 443   <tr>
 444     <td align="left">
 445     mouse.pressed
 446     </td>
 447     <td align="left">
 448     mouse pressed events
 449     </td>
 450   </tr>
 451   <tr>
 452     <td align="left">
 453     mouse.released
 454     </td>
 455     <td align="left">
 456     mouse released events
 457     </td>
 458   </tr>
 459   <tr>
 460     <td align="left">
 461     <strong>joystick</strong>
 462     </td>
 463     <td align="left">
 464     joystick event table
 465     </td>
 466   </tr>
 467   <tr>
 468     <td align="left">
 469     joystick.axis_motion
 470     </td>
 471     <td align="left">
 472     joystick axis motion events
 473     </td>
 474   </tr>
 475   <tr>
 476     <td align="left">
 477     joystick.ball_motion
 478     </td>
 479     <td align="left">
 480     joystick ball motion events
 481     </td>
 482   </tr>
 483   <tr>
 484     <td align="left">
 485     joystick.hat_motion
 486     </td>
 487     <td align="left">
 488     joystick hat motion events
 489     </td>
 490   </tr>
 491   <tr>
 492     <td align="left">
 493     joystick.pressed
 494     </td>
 495     <td align="left">
 496     joystick button pressed events
 497     </td>
 498   </tr>
 499   <tr>
 500     <td align="left">
 501     joystick.released
 502     </td>
 503     <td align="left">
 504     joystick button released events
 505     </td>
 506   </tr>
 507   <tr>
 508     <td align="left">
 509     quit
 510     </td>
 511     <td align="left">
 512     quit event
 513     </td>
 514   </tr>
 515   <tr>
 516     <td align="left">
 517     <em>type</em>
 518     </td>
 519     <td align="left">
 520     state variable
 521     </td>
 522   </tr>
 523   <tr>
 524     <td align="left">
 525     <em>state</em>
 526     </td>
 527     <td align="left">
 528     state variable
 529     </td>
 530   </tr>
 531   <tr>
 532     <td align="left">
 533     <em>arg1</em>
 534     </td>
 535     <td align="left">
 536     state variable
 537     </td>
 538   </tr>
 539   <tr>
 540     <td align="left">
 541     <em>arg2</em>
 542     </td>
 543     <td align="left">
 544     state variable
 545     </td>
 546   </tr>
 547   <tr>
 548     <td align="left">
 549     <em>arg3</em>
 550     </td>
 551     <td align="left">
 552     state variable
 553     </td>
 554   </tr>
 555   <tr>
 556     <td align="left">
 557     <em>arg4</em>
 558     </td>
 559     <td align="left">
 560     state variable
 561     </td>
 562   </tr>
 563 </tbody>
 564 </table>
 565 </div>
 566 </div>
 567 <h2>2. Methods</h2>
 568 <div class="sectionbody">
 569 <div class="tableblock">
 570 <table rules="all"
 571 frame="hsides"
 572 cellspacing="0" cellpadding="4">
 573 <col width="171" />
 574 <col width="285" />
 575 <thead>
 576   <tr>
 577     <th align="left">
 578     Method
 579     </th>
 580     <th align="left">
 581     Description
 582     </th>
 583   </tr>
 584 </thead>
 585 <tbody valign="top">
 586   <tr>
 587     <td align="left">
 588     new(o)
 589     </td>
 590     <td align="left">
 591     constructor
 592     </td>
 593   </tr>
 594   <tr>
 595     <td align="left">
 596     gather_events()
 597     </td>
 598     <td align="left">
 599     processes all pending events
 600     </td>
 601   </tr>
 602 </tbody>
 603 </table>
 604 </div>
 605 </div>
 606 <h2>3. Event Function Prototypes</h2>
 607 <div class="sectionbody">
 608 <div class="tableblock">
 609 <table rules="all"
 610 frame="hsides"
 611 cellspacing="0" cellpadding="4">
 612 <col width="251" />
 613 <col width="228" />
 614 <thead>
 615   <tr>
 616     <th align="left">
 617     Event
 618     </th>
 619     <th align="left">
 620     Prototype
 621     </th>
 622   </tr>
 623 </thead>
 624 <tbody valign="top">
 625   <tr>
 626     <td align="left">
 627     mouse.motion
 628     </td>
 629     <td align="left">
 630     function(x, y, xrel, yrel)
 631     </td>
 632   </tr>
 633   <tr>
 634     <td align="left">
 635     mouse.pressed
 636     </td>
 637     <td align="left">
 638     function(x, y)
 639     </td>
 640   </tr>
 641   <tr>
 642     <td align="left">
 643     mouse.released
 644     </td>
 645     <td align="left">
 646     function(x, y)
 647     </td>
 648   </tr>
 649   <tr>
 650     <td align="left">
 651     joystick.axis_motion
 652     </td>
 653     <td align="left">
 654     function(axis, axis_value)
 655     </td>
 656   </tr>
 657   <tr>
 658     <td align="left">
 659     joystick.ball_motion
 660     </td>
 661     <td align="left">
 662     function(ball, xrel, yrel)
 663     </td>
 664   </tr>
 665   <tr>
 666     <td align="left">
 667     joystick.hat_motion
 668     </td>
 669     <td align="left">
 670     function(hat, hat_value)
 671     </td>
 672   </tr>
 673   <tr>
 674     <td align="left">
 675     joystick.pressed
 676     </td>
 677     <td align="left">
 678     function(button)
 679     </td>
 680   </tr>
 681   <tr>
 682     <td align="left">
 683     joystick.released
 684     </td>
 685     <td align="left">
 686     function(button)
 687     </td>
 688   </tr>
 689   <tr>
 690     <td align="left">
 691     quit
 692     </td>
 693     <td align="left">
 694     function()
 695     </td>
 696   </tr>
 697 </tbody>
 698 </table>
 699 </div>
 700 </div>
 701 <h2>4. Notes</h2>
 702 <div class="sectionbody">
 703 <p>Joysticks and joystick buttons start numbering at 1, not 0.</p>
 704 </div>
 705 <h2>5. Usage</h2>
 706 <div class="sectionbody">
 707 <div class="listingblock">
 708 <div class="content"><!-- Generator: GNU source-highlight 2.4
 709 by Lorenzo Bettini
 710 http://www.lorenzobettini.it
 711 http://www.gnu.org/software/src-highlite -->
 712 <pre><tt><span style="font-style: italic"><span style="color: #9A1900">--create a new EventManager</span></span>
 713 evman <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">EventManager:new</span></span><span style="color: #990000">()</span>
 714
 715 <span style="font-style: italic"><span style="color: #9A1900">--add an event to exit when ESC is pressed</span></span>
 716 <span style="font-style: italic"><span style="color: #9A1900">-- assumes main loop is controlled by variable "done"</span></span>
 717 evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>ESCAPE<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> done <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">true</span></span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 718
 719 <span style="font-style: italic"><span style="color: #9A1900">--events to control a player object's movement</span></span>
 720 evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>UP<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>y_vel <span style="color: #990000">=</span> <span style="color: #990000">-</span><span style="color: #993399">1</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 721 evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>DOWN<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>y_vel <span style="color: #990000">=</span> <span style="color: #993399">1</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 722 evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>LEFT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>x_vel <span style="color: #990000">=</span> <span style="color: #990000">-</span><span style="color: #993399">1</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 723 evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>RIGHT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>x_vel <span style="color: #990000">=</span> <span style="color: #993399">1</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 724
 725 evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>released<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>UP<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>y_vel <span style="color: #990000">=</span> <span style="color: #993399">0</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 726 evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>released<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>DOWN<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>y_vel <span style="color: #990000">=</span> <span style="color: #993399">0</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 727 evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>released<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>LEFT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>x_vel <span style="color: #990000">=</span> <span style="color: #993399">0</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 728 evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>released<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>RIGHT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>x_vel <span style="color: #990000">=</span> <span style="color: #993399">0</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 729
 730 <span style="font-style: italic"><span style="color: #9A1900">--EventManager for a fictional menu object</span></span>
 731 menu_evman <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">EventManager:new</span></span><span style="color: #990000">()</span>
 732 menu_evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>UP<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> menu<span style="color: #990000">.</span><span style="font-weight: bold"><span style="color: #000000">next_item</span></span><span style="color: #990000">()</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 733 menu_evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>DOWN<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> menu<span style="color: #990000">.</span><span style="font-weight: bold"><span style="color: #000000">prev_item</span></span><span style="color: #990000">()</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 734 menu_evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>RETURN<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> menu<span style="color: #990000">.</span><span style="font-weight: bold"><span style="color: #000000">execute</span></span><span style="color: #990000">()</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 735
 736 <span style="font-style: italic"><span style="color: #9A1900">--Controlling a player with the mouse</span></span>
 737 <span style="font-style: italic"><span style="color: #9A1900">-- assume there exists a player:set_pos(x,y) method</span></span>
 738
 739 <span style="font-style: italic"><span style="color: #9A1900">--wrapper function for player:set_pos(x,y)</span></span>
 740 <span style="font-weight: bold"><span style="color: #0000FF">function</span></span> <span style="font-weight: bold"><span style="color: #000000">move_player</span></span><span style="color: #990000">(</span>x<span style="color: #990000">,</span>y<span style="color: #990000">)</span>
 741   <span style="font-weight: bold"><span style="color: #000000">player:set_pos</span></span><span style="color: #990000">(</span>x<span style="color: #990000">,</span>y<span style="color: #990000">)</span>
 742 <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 743
 744 evman<span style="color: #990000">.</span>mouse<span style="color: #990000">.</span>motion <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">move_player</span></span><span style="color: #990000">(</span>x<span style="color: #990000">,</span>y<span style="color: #990000">)</span>
 745 evman<span style="color: #990000">.</span>mouse<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>MouseButton<span style="color: #990000">.</span>BUTTON_LEFT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>firing <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">true</span></span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 746 evman<span style="color: #990000">.</span>mouse<span style="color: #990000">.</span>released<span style="color: #990000">[</span>MouseButton<span style="color: #990000">.</span>BUTTON_LEFT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>firing <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">false</span></span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 747
 748 <span style="font-style: italic"><span style="color: #9A1900">--quitting (assumes main loop is controlled by done variable)</span></span>
 749 evman<span style="color: #990000">.</span>quit <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> done <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">true</span></span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
 750
 751 </tt></pre></div></div>
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